CA2175556A1 - Method of masking data on a storage medium - Google Patents
Method of masking data on a storage mediumInfo
- Publication number
- CA2175556A1 CA2175556A1 CA002175556A CA2175556A CA2175556A1 CA 2175556 A1 CA2175556 A1 CA 2175556A1 CA 002175556 A CA002175556 A CA 002175556A CA 2175556 A CA2175556 A CA 2175556A CA 2175556 A1 CA2175556 A1 CA 2175556A1
- Authority
- CA
- Canada
- Prior art keywords
- track
- data
- location
- disk
- magneto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000003860 storage Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000000873 masking effect Effects 0.000 title claims abstract description 23
- 238000013518 transcription Methods 0.000 claims abstract description 15
- 230000035897 transcription Effects 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims 2
- 238000009877 rendering Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 11
- 239000000758 substrate Substances 0.000 description 8
- 239000011521 glass Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000013500 data storage Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 101100274524 Mus musculus Clec18a gene Proteins 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 208000028964 Congenital reticular ichthyosiform erythroderma Diseases 0.000 description 1
- 241000234435 Lilium Species 0.000 description 1
- 241000610375 Sparisoma viride Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
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- 238000005520 cutting process Methods 0.000 description 1
- 238000000688 desorption electrospray ionisation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- CFMYXEVWODSLAX-QOZOJKKESA-N tetrodotoxin Chemical compound O([C@@]([C@H]1O)(O)O[C@H]2[C@@]3(O)CO)[C@H]3[C@@H](O)[C@]11[C@H]2[C@@H](O)N=C(N)N1 CFMYXEVWODSLAX-QOZOJKKESA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10595—Control of operating function
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
-
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- G11—INFORMATION STORAGE
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- G11B20/10—Digital recording or reproducing
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- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
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- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
- G11B23/281—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs by changing the physical properties of the record carrier
- G11B23/282—Limited play
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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10592—Audio or video recording specifically adapted for recording or reproducing multichannel signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2525—Magneto-optical [MO] discs
- G11B2220/2529—Mini-discs
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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
Abstract
A method of masking data on a storage medium for selective playback upon demand or for transportation to another medium. The method comprising the stops of (a) determining the position of the start location on the storage medium, (b) determining the position of the stop location on the storage medium, (c) positioning at least one data track on the storage medium between the start location and the stop location such that the data track has, adjacent thereto, enough space or time for accepting a concealed data track, and (d) impressing data on the storage medium for generating the concealed track having a hidden recording area such that the hidden recording area contains concealed data which can be accessed upon demand for transcription to another medium or for playback. The present invention can be adapted for use with different storage media such as, for example, a compact disk, a read-only memory compact disk, a minidisk, a photo compact disk or the like. More particularly, the step of impressing data on the storage medium for generating the concealed track further comprises the step of generating the concealed track by identifying a position within the gap relative to either location or time for working with a player or transcriber and impressing the concealed track on the storage medium at the identified position.
Description
-~WO 95/17750 2 1 7 5 5 5 6 PCT/US94/14784 METHOD OF MASKING DATA ON A STORAGE MEDIUM
WO 95117750 2 1 7 5 5 5 6 PCTIUS94/14784 ~
FIELD OF lrEIE I~VENTION
The present invention relates to a method of masking data on a storage medium for selective playback upon demand or for transcription to another medium. Specifically, the present 5 invention relates to adapting a storage medium for recording information on such medium in gaps adjacent to the data tracks or at the end of the data tracks.
CROSS 1~ K ~ ~CE TO R~T,~TTi T~ APPLICATION
The present application is a c~ntinll~tion-in-part 10 application of the application of Randall Jamail and David Thomr.qrm, bearing U. S. Ser;al No. 08/301,040, filed September 6, 1994, entitled "Method of Selectively Con~e~lin~ Magneto-Optical Compact Disk Data For Playback Upon Demand,"
which was a continll~tion of the application of equal inventors 1~ bearing U. S. Serial No. 08/172,849, filed December 22, 1993, entitled "Method of Prerecording Data for Playback Upon Demand."
RA~KGROU~D OF TlEIE INV~NTION
Data storage media are well known. Particularly, optical 20 data storage media in the form of compact disks are well known. Compact disks are an alternative to long-playing records and m~n~tir. tape r"""?tt~ The disks with which consumers are familiar are optical read-only disks and the common disk player is designed specifically for this type of disk.
25 These disks have a reflective surface c--nt~inin~ pits which represent data in binary form. I~description of these pits and ~WO 95117750 2 1 7 5 5 5 6 Pcrlus94/14784 how they function is provided by W~tlrin~on, The Art of Digital Audio," Focal Press, Chapter 13.
Compact disks are currently produced by a pressing process similar to the process used to produce conventional long 5 playing records. The process is referred to herein as the Umastering'' process. The mastering process starts by first poliRhin~ a plain glass optical disk. The disk has an outside tli~mPtqr from 200 to 240 mm, a thi~lrnP~ of 6 mm and undergoes various cleaning and washing steps. The disk is then 10 coated with a thin chrome film or coupling agent, a step taken to produce ~lhP~ion between the glass disk and a layer of photo-Iesist, which is a photo-sensitive material. Data on a compact disk master tape are then transferred to the glass disk by a ~aser beam cutting method.
15 The glass disk is still completely flat after it is written on ~y the laser beam because pits are not formed until the glass is photographically developed. The disk surface is first made ~lPctri~-~lly conductive and then subjected to a nickel evaporation process. The disk, typically known as the glass 20 master, then undergoes nickel electrocasting, a process which is similar to that used in making analog phonograph records. A
series of metal repli-~tic-n~ follow, resulting in a disk called a stamper. The stamper is equivalent to a photographic negative in the sense that it is a reverse of the final compact disk; that is, 25 there are now bumps where there were pits. This stamper is then used to make a pressing on a transparent polymer such as polyvinyl chloride, poly(ethyl-metacrylate) or a polycarbonate.
The stamped surface is then plated with a reflective film such WO95/17750 2 1 7 5 5 5 6 PCT/US94/14784 ~
as aluminum or another metal, and finally a plastic coating is applied over the film to form a rigid structure.
The player operates by focusing a laser beam on the reflective metal through the substrate and then ~ tectin~
5 reflected light. The optical properties of the substrate, such as its thi(~kn~ and index of refraction, are thus critical to the player's detection systems and standard players are designed specifically with these parameters in mind.
The pits increase the optical path of the laser beam by an 10 amount equivalent to a half wavelength, thereby producing destructive interference when cnmhin.od with other (non-shifted) reflected beams. The presence of data thus takes the form of a drop in illL~ ;ily of the reflected light. The ~tectinn system on a standard player is thus designed to require greater 15 than 70% reflection when no destructive interference occurs and a mnd~ tinn amplitude greater than 30% when data is present. These illtWl~i~y limits, cnmhinPd with the focusing parameters, set the criteria for the compact disks and other optical data storage media which can be read or played on such 20 players. Media on which data can be recorded directly on and read directly from have a different configuration and operate under a somewhat different principle. One example is described in U.S. Pat. No. 4,719,615 (Feyrer et al.).
As optical information recording media of this type, 25 compact disks (herein referred to simply as "CD") have been practically developed and widely used as optical information recording media of ROM (read only memory) type wherein pits are already formed on a light ~ -g substrate by means ~wo 9r71l7750 2 1 7 5 5 5 6 PCIIUS94114784 of, for .oY~mrlP, a press and a reflective layer of a metal is formed on the surface having such pits. As a further progress from such a ROM type, optical inform~tion recording media have been proposed on which information can be recorded by 5 irradiating a laser beam to the substrate as the user requires.
Eor Example, Japanese Un~Y~min~d Patent pl]hli~ti~)n No.
89605/1979 discloses an optical information recording medium which comprises at least a transparent substrate, a light absul~ive layer ennt~inin~ a ccloring matter formed on the 10 substrate and a light reflective layer formed on the light abso~Liv~ layer, and on which information can optically be recorded and from which the recorded information can be reproduced.
To conduct the ~dy~ud~ ion by commercially available 15 CD players, optical recording media must be able to produce read-out signals which satisfy the CD standards whieh are ~c~ep~e~l world wide. To satisfy the CD standards, typical ui~uents are that the r~fl~ct~nce is at least 70~6; the block error rate is at most 3.0 Y 10-~; and when a push-pull method is 20 employed for tracking pits, the push-pull valve is from 0.04 to 0.07.
However, none of the conventional recording media co~prising a substrate ha~ing a pregroove, a light ab~ul~liv~d layer ~ ;.,g a coloring matter formed on the substrate and 25 a light reflective layer formed on this ab~,ul~live layer, uses all the aspects of the CD format satisfying the various c~nrlitionR
prescribed by the CD standards.
WO 95/17750 2 1 7 5 5 5 6 PCltUS94/14784 It is, therefore, a feature of the present invention to provide a method of recording data for masking or conce~lin~
the data for later playback upon demand.
A feature of the present invention is to provide a method of 5 masking data on a storage medium for selective playback upon demand or for transcription to another medium is provided.
Another feature of the present invention is to provide a method of masking data on a storage medium for po~it.ionin~ at least one data track on the storage medium such that the data 10 track has, adjacent thereto, enough space or time for accepting a conr~led data track.
Yet another feature of the present invention is to provide a method of masking data on a storage medium for pf~ a last data track on the storage medium such that the data track 15 has adjacent thereto, and after the last data track, enough space or time for accepting a ~-~n~e~ d data track.
Yet another feature of the present invention is to provide a method of masking data on a storage medium for impressing data on the storage medium for generating a c--ncP~l~d track.
20 Still another feature of the present invention is to provide a method of masking data on a storage medium for impressing data on the storage medium for generating a hidden recording area such that the hidden recording area contains c--nc~led data which can be accessed upon demand for transcription to 25 another medium or for playback.
Yet still another feature of the present invention is to provide a method of masking data on a storage medium such ae, for ~ le, ~ co~pact di~k, a rea~ nly memory compact ~0 95/~7750 2 1 7 5 5 5 6 PCTllJS94114784 disk, a mini-disk, a photo compact disk or the like for impressing data on the storage medium for generating a conr~lPd track which can be accessed upon demand for transcription to another medium or for playback.
A~1(1ition~1 features and advantages of the invention will be set forth in part in the description which follows, and in part will become apparent from the description, or may be learned by practice of the invention. The features and advantages of the invention may be realized by means of the cnmhin~ti~n~ and 10 steps particularly pointed out in the appe~ded claims.
SUMlvlARY OF THlE INVlENTION
To achieve the foregoing objects, features, and advantages and in accordance with the purpose of the invention as embodied and broadly ~ rih~d herein, a method of m~kin~
15 data on a storage medium for selective playback upon demand or for ~l~s~ l,ion to another medium is provided.
The method of masking data on a storage medium is typically used with a storage medium adapted for co.",lll."ic~t;-m with a player or transcriber such that the 20 storage medium has a start location and a stop location with at least one data track therebetween. Each data track can include a data recording area for recording or reproducing the data.
Also each track can include a start position indicative of a beginning location for the data recording area for that 25 ~articular track. Typically, the sta~t location precedes the first start position for the first track for either a location or a time of operation. The stop location follows the last data recording area WO 9~/17750 2 1 7 5 5 5 6 PCT/US94/14784 for the last track to be located with respect to position on the medium or time of operation ~eeof~i~ted with the medium.
Typically, the storage medium has a begin communication location at or in close ,ulu2~ lily to the start position inrlir~tin~
WO 95117750 2 1 7 5 5 5 6 PCTIUS94/14784 ~
FIELD OF lrEIE I~VENTION
The present invention relates to a method of masking data on a storage medium for selective playback upon demand or for transcription to another medium. Specifically, the present 5 invention relates to adapting a storage medium for recording information on such medium in gaps adjacent to the data tracks or at the end of the data tracks.
CROSS 1~ K ~ ~CE TO R~T,~TTi T~ APPLICATION
The present application is a c~ntinll~tion-in-part 10 application of the application of Randall Jamail and David Thomr.qrm, bearing U. S. Ser;al No. 08/301,040, filed September 6, 1994, entitled "Method of Selectively Con~e~lin~ Magneto-Optical Compact Disk Data For Playback Upon Demand,"
which was a continll~tion of the application of equal inventors 1~ bearing U. S. Serial No. 08/172,849, filed December 22, 1993, entitled "Method of Prerecording Data for Playback Upon Demand."
RA~KGROU~D OF TlEIE INV~NTION
Data storage media are well known. Particularly, optical 20 data storage media in the form of compact disks are well known. Compact disks are an alternative to long-playing records and m~n~tir. tape r"""?tt~ The disks with which consumers are familiar are optical read-only disks and the common disk player is designed specifically for this type of disk.
25 These disks have a reflective surface c--nt~inin~ pits which represent data in binary form. I~description of these pits and ~WO 95117750 2 1 7 5 5 5 6 Pcrlus94/14784 how they function is provided by W~tlrin~on, The Art of Digital Audio," Focal Press, Chapter 13.
Compact disks are currently produced by a pressing process similar to the process used to produce conventional long 5 playing records. The process is referred to herein as the Umastering'' process. The mastering process starts by first poliRhin~ a plain glass optical disk. The disk has an outside tli~mPtqr from 200 to 240 mm, a thi~lrnP~ of 6 mm and undergoes various cleaning and washing steps. The disk is then 10 coated with a thin chrome film or coupling agent, a step taken to produce ~lhP~ion between the glass disk and a layer of photo-Iesist, which is a photo-sensitive material. Data on a compact disk master tape are then transferred to the glass disk by a ~aser beam cutting method.
15 The glass disk is still completely flat after it is written on ~y the laser beam because pits are not formed until the glass is photographically developed. The disk surface is first made ~lPctri~-~lly conductive and then subjected to a nickel evaporation process. The disk, typically known as the glass 20 master, then undergoes nickel electrocasting, a process which is similar to that used in making analog phonograph records. A
series of metal repli-~tic-n~ follow, resulting in a disk called a stamper. The stamper is equivalent to a photographic negative in the sense that it is a reverse of the final compact disk; that is, 25 there are now bumps where there were pits. This stamper is then used to make a pressing on a transparent polymer such as polyvinyl chloride, poly(ethyl-metacrylate) or a polycarbonate.
The stamped surface is then plated with a reflective film such WO95/17750 2 1 7 5 5 5 6 PCT/US94/14784 ~
as aluminum or another metal, and finally a plastic coating is applied over the film to form a rigid structure.
The player operates by focusing a laser beam on the reflective metal through the substrate and then ~ tectin~
5 reflected light. The optical properties of the substrate, such as its thi(~kn~ and index of refraction, are thus critical to the player's detection systems and standard players are designed specifically with these parameters in mind.
The pits increase the optical path of the laser beam by an 10 amount equivalent to a half wavelength, thereby producing destructive interference when cnmhin.od with other (non-shifted) reflected beams. The presence of data thus takes the form of a drop in illL~ ;ily of the reflected light. The ~tectinn system on a standard player is thus designed to require greater 15 than 70% reflection when no destructive interference occurs and a mnd~ tinn amplitude greater than 30% when data is present. These illtWl~i~y limits, cnmhinPd with the focusing parameters, set the criteria for the compact disks and other optical data storage media which can be read or played on such 20 players. Media on which data can be recorded directly on and read directly from have a different configuration and operate under a somewhat different principle. One example is described in U.S. Pat. No. 4,719,615 (Feyrer et al.).
As optical information recording media of this type, 25 compact disks (herein referred to simply as "CD") have been practically developed and widely used as optical information recording media of ROM (read only memory) type wherein pits are already formed on a light ~ -g substrate by means ~wo 9r71l7750 2 1 7 5 5 5 6 PCIIUS94114784 of, for .oY~mrlP, a press and a reflective layer of a metal is formed on the surface having such pits. As a further progress from such a ROM type, optical inform~tion recording media have been proposed on which information can be recorded by 5 irradiating a laser beam to the substrate as the user requires.
Eor Example, Japanese Un~Y~min~d Patent pl]hli~ti~)n No.
89605/1979 discloses an optical information recording medium which comprises at least a transparent substrate, a light absul~ive layer ennt~inin~ a ccloring matter formed on the 10 substrate and a light reflective layer formed on the light abso~Liv~ layer, and on which information can optically be recorded and from which the recorded information can be reproduced.
To conduct the ~dy~ud~ ion by commercially available 15 CD players, optical recording media must be able to produce read-out signals which satisfy the CD standards whieh are ~c~ep~e~l world wide. To satisfy the CD standards, typical ui~uents are that the r~fl~ct~nce is at least 70~6; the block error rate is at most 3.0 Y 10-~; and when a push-pull method is 20 employed for tracking pits, the push-pull valve is from 0.04 to 0.07.
However, none of the conventional recording media co~prising a substrate ha~ing a pregroove, a light ab~ul~liv~d layer ~ ;.,g a coloring matter formed on the substrate and 25 a light reflective layer formed on this ab~,ul~live layer, uses all the aspects of the CD format satisfying the various c~nrlitionR
prescribed by the CD standards.
WO 95/17750 2 1 7 5 5 5 6 PCltUS94/14784 It is, therefore, a feature of the present invention to provide a method of recording data for masking or conce~lin~
the data for later playback upon demand.
A feature of the present invention is to provide a method of 5 masking data on a storage medium for selective playback upon demand or for transcription to another medium is provided.
Another feature of the present invention is to provide a method of masking data on a storage medium for po~it.ionin~ at least one data track on the storage medium such that the data 10 track has, adjacent thereto, enough space or time for accepting a conr~led data track.
Yet another feature of the present invention is to provide a method of masking data on a storage medium for pf~ a last data track on the storage medium such that the data track 15 has adjacent thereto, and after the last data track, enough space or time for accepting a ~-~n~e~ d data track.
Yet another feature of the present invention is to provide a method of masking data on a storage medium for impressing data on the storage medium for generating a c--ncP~l~d track.
20 Still another feature of the present invention is to provide a method of masking data on a storage medium for impressing data on the storage medium for generating a hidden recording area such that the hidden recording area contains c--nc~led data which can be accessed upon demand for transcription to 25 another medium or for playback.
Yet still another feature of the present invention is to provide a method of masking data on a storage medium such ae, for ~ le, ~ co~pact di~k, a rea~ nly memory compact ~0 95/~7750 2 1 7 5 5 5 6 PCTllJS94114784 disk, a mini-disk, a photo compact disk or the like for impressing data on the storage medium for generating a conr~lPd track which can be accessed upon demand for transcription to another medium or for playback.
A~1(1ition~1 features and advantages of the invention will be set forth in part in the description which follows, and in part will become apparent from the description, or may be learned by practice of the invention. The features and advantages of the invention may be realized by means of the cnmhin~ti~n~ and 10 steps particularly pointed out in the appe~ded claims.
SUMlvlARY OF THlE INVlENTION
To achieve the foregoing objects, features, and advantages and in accordance with the purpose of the invention as embodied and broadly ~ rih~d herein, a method of m~kin~
15 data on a storage medium for selective playback upon demand or for ~l~s~ l,ion to another medium is provided.
The method of masking data on a storage medium is typically used with a storage medium adapted for co.",lll."ic~t;-m with a player or transcriber such that the 20 storage medium has a start location and a stop location with at least one data track therebetween. Each data track can include a data recording area for recording or reproducing the data.
Also each track can include a start position indicative of a beginning location for the data recording area for that 25 ~articular track. Typically, the sta~t location precedes the first start position for the first track for either a location or a time of operation. The stop location follows the last data recording area WO 9~/17750 2 1 7 5 5 5 6 PCT/US94/14784 for the last track to be located with respect to position on the medium or time of operation ~eeof~i~ted with the medium.
Typically, the storage medium has a begin communication location at or in close ,ulu2~ lily to the start position inrlir~tin~
6 the b~ginnin~ of the data recording area for the respective track. The first start positi~n is indicative of the beginning of the data recording area for tlle first track and the start position for each subæeulu~:llL track, if any, is indicative of the be~innin~
of the data recording area for the respective track. The storage 10 medium is engaged at the begin commllnir~tion location for either recording or reproducing data for each l~b~e. li~,~ data track.
The method of the present invention comprising the steps of (a) determining the position of the start location on the 15 storage medium, (b) d~ illg the position of the stop location on the storage medium, (c) po.eitinnine at least one data track on the storage medium between the start location and the stop location such that the data track has, adjacent thereto, enough space or time for accepting a cnn~e~l~d data track, and 20 (d) hllpl~billg data on the storage medium for generating the çnnre~led track having a hidden recording area such that the hidden recording area contains çnn~PAl~d data which can be accessed upon demand for t~ranscription to another medium or for playback.
25 The present invention can be adapted for use with different storage media such as, for ~Y~m~l~, a compact disk, a read-only memory compact disk, a mini-disk, a photo compact disk or the like.
~WO 95/~7750 2 1 7 5 5 5 6 PCT/US94J14784 Particularly, the step of impressing data on the storage ~edium for generating the ~r)n~e~l~d track further comprises the step of generating the conres3l~d track by identifying a position within the gap relative t~ either location or time for 5 working with a player or transcriber and hll~ illg the cnnce~ d track on the storage medium at the i~l~ntifiPd position. The step of hllp~ g the c--nrP~lPd track on the storage medium at the i~rntifi~d position includes i",,uie~billg a recording area within the cnnre~led track, and illlple~i"g a 10 s~art position within the con<.~lPd track for in~ir~tinF the location where the recording area begins for the conce~led track~ The ætep of identifying a position within the gap comprises the step of identifying a position with respect to the begi~ l~.""~l""l;r~qtinn location or with respect to the start 15 location or alternately with respect to the start position.
RRT~li' Dl~ CRIE'TION OF T~ DRAWINGS
The ~c~mr~nying drawings which are ill~,ul~ul~lLdd in and c~n~titllte a part of the Pperifirs~tir,n, illustrate a preferred embodiment of the invention an~ together with the general 20 description of the illv~l~Lioll given above and the detailed description of the preferred embodiment given below, serve to explain the prinrirl~ of the invention.
FIG. 1 is a partial cross section perspective view of a conventional compact disk (Prior Art).
25 FIG. 2 is a flow diagram illustrating a preferred ~mho~lim~nt of the present invention.
g FIG. 3 is a flow diagram illustrating the sequence of track counts on a conventional CD (Prior Art).
FIG. 4 is a flow diagram of another embodiment of the method of the present invention.
5 FIG. 5 is a Sl`h~?mAtiC illustration of a representative configuration embodying a track layout A-lArt~hl~ for use with the present invention.
FIG. 6 is a generic illustration of the ~ sell~aLiv~
configuration as illustrated in FIG. 5.
FIG. 7 illustrates a l~ ative configuration of a track layout A-lApt~hlP for use with the present invention.
FIG. 8 illustrates an Pmhorlimant of a representative configuration wherein the track and recording areas are ;~Pnti"Al areas.
FIG. 9 illustrates another ~ se~ liv~ configuration of another track layout adaptable for use with the present invention.
FIG. 10 is a ærh~mAti~ illustrating more particularly a cnn~eAl~d track disposed within a gap as practiced by the 20 present illV~lli,iUll.
FIG. 11 illustrates yet another ~mhodim~nt of the present invention with the con(~e~l~d track at the end of the data medium.
FIG. 12 illustrates yet another ~mho~im~nt of the present 25 invention wherein two cnnl~Aled tracks are placed between two data tracks.
~WO 9S117750 2 1 7 5 5 5 6 PCTIUS94114784 FIG. 13 illustrates yet another embodiment of the present invention wherein a plurality of cnnr~led tracks are located at the end of a storage m~ m FIG. 14 is a flow chart illustrating one embodiment of the 5 method of masking data on a storage medium as taught by the present invention.
FIG. 15 is another flow chart illustrating a more detailed embodiment of the method of masking data on a storage medium as taught by the present invention.
10 The above general description and the following detailed dts. liluLiu-l are merely illubl~Liv~ of the generic invention, and iti~)n~l modes, advantages, an~ particulars of this invention will be readily suggested to those skilled in the art without departing from the spirit and scope of the invention.
DT'~.TATT,T'~.T) DESI~RTPTION OF
'l'h~ J~ Kl?h'.T) Ti'.MP~ODIMENTS
Reference will now be made in detail to the present LJ~dr.~ d embodiments of the invention as described in the ~cc~ mr~nying drawings.
20 The .presently ~dr~ d application of the present invention is for use with standard audio compact discs as found in, for f~mrle, music and record stores. However, the present invention can be adapted for use in other related storage media such as, for ~Y~mrlP, CD-ROM discs, mini-compact discs, 25 singlc~ m or multi-session Photo CDs, as well as 80-mm-~ m~ter CD discs. A wide selection of CD storage media is available for entert~inrn-~nt, ecl~ t;~)n, and business.
A typical disc can hold over 650 megabytes (MB) of information WO 95/17750 2 1 7 5 5 5 6 PCT/US941147~4 ~
-- the equivalent of 270,000 pages of text, up to eight hours of speech and music (depending on the sound quality), hundreds of high-rP~oll1ti~m images, or any comhin~ti~ n of text, sound and graphics.
Standard music CDs provide sound and music recorded in a format typically referred to as digital audio. The present invention is especially adaptable for use in the digital audio format. Prior formats for storage media are silent with respect to cfn-~e~linE tracks or data between or adjacent to ~3rcP~ihlP
10 tracks or data available for use.
Developers and industry producers have implf~m~nt.qd numerous and varied standards or protocols. Of particular relevance are the CD standards co-developed by Philips and Sony for the digital audio i~ormat. The Phillips/Sony digital 15 audio format is called CD Digital Audio." The Philips/Sony CD
Digital Audio te~hnology is available for license from Philips in what is called the "Red Book." The Red Book standards have become the industry standards in the digital audio industry.
T_e present invention providles a ~ienifi~nt adv~ncPm~nt to all 20 known industry standards for digital audio te-~hn~-lngy, inrlllrlinE the Red Book stanclards.
Further, the present invention has application to other known standards or protocols. Standards of relevance and possible application to the pr~sent invention are the Philips/Sony 2~ CD-ROM standards, known as the Yellow Book; the Philips/Sony CD-I standards, known the Green Book; the Philips/Sony Recordable CD standards, known as the Orange Book; the Philips/Sony CD-Video/Laser Disc standards; the ~ 0 95117750 2 1 7 5 5 5 6 PCT/US94/14784 Pllilips/Sony CD-ROM XA standards; the Philips/Sony CD-I
Ready standards; the Philips/Sony CD-I Bridge standards; the P~ilips/Kodak Photo CD standard; and the Philips/JVC Video CD sperific~tion standard, known as the White Book.
5 It is known in the industry to use a pre-gap on the compact disk. The pre-gap is a buffer between a start cr,mmllnic~tinn location on the ¢D and a first start mark indicative of a beginning location for the data recording area for the first track on the CD. The stau^t co,~ ..lic~tic-n location on 10 the CD is typically closer to the than the perimeter of the CD so that the CD is transcribed in an outward PYr~n(lin~ radial di~rection. The pre-gap is provided, indeed required, on CD's to assure that the player can align itself with the start mark.
Typically, the pre-gap is two (2) seconds on a CD. The pre-gap 15 can be termed a buffer.
The CD player provides an indexing merh~ni~m The inrl~Yi~ m~rh~ni~m reads from the CD a table of cnnhont~
The table of contents ~R~oci~ted with the CD determines, for m~l~, the start and finish location, and ~ e.,Live times for 20 the different tracks or groupings of data on the CD. The CD
table of contents information is read by the player and stored in memory. Based upon the table of contents information from the CD, the memory in the player knows, for PY~mrl~, where each track begins, each track ends and the length of the 2i respective track. Typically, the table of contents has the track lnr~tinn~ Each track has a b~innin~ index point and may have an ending in~ex point. Typically, the track will begin at index 1 and end at index 0. Thus, the begin play point is at WO 95/17750 2 1 7 5 5 5 6 PCIIUS94/14784 o track 1, index 1. If there are X tracks on a CD, the last play location would be track X, index 0. The location iflAntifi~d by track 1, index 1 is the begin play point.
H~l ~loro~ ~, the pre-gap provided a location point for 5 aligning the CD in the player. The CD players are lu~lulu~ lllled to locate the end of the pre-gap location, i.e. the predefined begin play location. Thereafter, the table of contents is read by the player and the player haæ been discovered to be ~lu~ ed to remember the lor~tilmR of each of the tracks on 10 the CD. It is advantageous to use the pre-gap as an auxiliary recording zone. Thus, a conventional CD could be divided into two (2) recording zones, the pre-gap zone and the normal zone.
Using the pre-gap zone provides a new realm of filn(~ti~)n~lity to the standard CD player market. No changes or 15 adj-lQ~nAntR need to be ma~e to the CD player whatsoever.
Typically, a CD player can access the pre-gap by pressing and holding the rewind button so that the player scrûlls to the heginnin~ of a pre-track. The length of the pre-track can be set during the time the CD's are m~nllfs~tllred. For ~Y~mrle, in a 20 conventional CD, to use the method of the present invention, termed the Justice SoundboardTM pre-track, the CD is inserted and the play button is pressled. After the play button engages the CD and the CD is aligned, the table of contents is read and the first track is pl~s~ ed for ~luCe~billg, the rewind button is 25 pressed and held providing that the player scrolls to the beginnin~ of the Justice Soundboard~ pre-track. When the front of the pre-track location is reached, the button can be released, and the pre-track zone data will be transcribed by the ~WO 95/17750 2 1 7 5 5 5 6 PCT/US94/14784 player. This provides the availability of multiple independent track recording on a conventional CD.
FIG. 2 is a flow diagram illustrating the method of the present invention. The method provides for locating the begin 5 play point on the medium sllffiriPntly remote from the first play l~cation for accepting data between the begin play point and the first play location. Data is h~ s~ed on the medium in the pretrack location, i.e., between tlle first play location and the begin play point. Then, data is placed on the media as normally 10 done, for PYamrl~, between the first play location and the last play location. Further, the met~od provides for an~FinF the player for locating the begin play point. The player can be further engaged to locate the first play location. Thereafter, the player is directed to transcribe the data from the media between 15 the first play location and the begin play point, i.e., from the pre-gap zone. Thereafter, the player is provided access to transcribe the J~ F data as normally would be transcribed from a CD by a player.
FIG. 4 illustrates another embodiment of the invention of 20 the present aprli(at~n The r~ethod ;tl~ntifi.od in the flow diagram ill.~l~ ed in FIG. 4 provides for locating the begin lPlay point on the media sllffi~ ntJy remLote from the first play location for accepting data in a pretrack or pre-gap zone. Data is i~ ed on the pretrack or pre-gap zone which is located 25 between the first play location and the begin play point.
Further, as normally done on CD media, data is impressed between the begin play point and the end play point. Typically, this is done in a series of tracks. Thereafter, the player is WO 95/17750 2 1 7 5 5 5 6 PCT/US94/14784 o engaged for locating the begi~n play point. After the begin play point is located, the player is further engaged to locate the first play location. The player can transcribe the data from the media between the first play location and the begin play location 5 so that the pretrack data is transcribed from the pre-gap zone.
Lastly, the player can transcribe the data as normally transcribed from between the first play location and the last play location. It can be appreciated that this same technique can be used in any medium. It is not just the CD medium in 10 which the technique can be incorporated.
FIG. 5 is a s(~hPm~tic illustration of a representative configuration embodying a track layout ~rt~hl.o for use with the present invention. FIG. 5 illustrates a storage medium having three data tracks 202, 204, 206. The data tracks 202, 15 204, 206 are preceded by a start location 102, and tPrmin~ted by a stop location 106. Between the data tracks 202, 204, 206 and the start location 102 and the stop location 106 are gaps G.
More particularly, the gaps G may be defined as a pre-gap Gp, a first mid-gap Gl, a second mid-gap G2 and an end gap GE. A
20 begin commllnic~qtion location 302 is typically provided for the first data track 202. Further, a begin commllnir~ti- n location 302, 304~ 306 may be provided for each lt~b~e~ ~iV~ data track 202, 204, 206. It can be appreciated by those skilled in the art that the begin commllnir~tirn location 302 may be the only 25 such location required. For IPY~m~ , the begin communication location 302 is typically ad~pted for use with a player or a transcriber so that the player or tr~n~rrihPr will know where to begin removing data from the storage medium. Each data ~WO 95117750 2 1 7 5 5 5 6 PCT/US94/14784 track 202, 204 206 has its respective recording area 212, 214, 2~6. Similarly, each recording area 212, 214, 216 has it6 respective start position 222, 224, 226.
- FIG. 6 is a generic illustration of the represe~ iv~
5 ccnfiguration as illustrated in FIG. 5. FIG. 6 illustrates that a plurality of tracks can be adapted for use with the storage medium and in conjunction with t~e present invention. FIG. 6 illustrates data tracks ranging from data track 1 through data track N. The data tracks provide for a following gap G1 10 through GX and GE. Of particular interest i6 the break away portion of FIG. 6 which illustrates that the data track 204 is spaced in time or distance from the subsequent illu~LIdled data track 21X. The data track 21X is po~itinn~d so as to be separated from data track 21X+1 by the gap GX. The data 15 track 21X+1 is spaced remotely from the la6t data track 21N.
T~e last data track 21N is illustrated being adjacent the end gap GE. The end gap GE s~a~ s tl1e data track 21N from the 6top location 106.
It can be appreciated by those skilled in the art that the 20 representative configurations adapted for use with the present iLvention can vary. FIGS. 7, 8 and 9 illu6trate variations of representative configurations whicl1 can be adapted for use with the present invention. FIG. 8 illu6trates an embodiment of a representative configuration wherein the track and recording 25 areas are i(l~nti~l areas 232, 234, 236. The start position 222, 224, 226 for the ~ 6~,liv~ track/recording areas 232, 234, 236 are used in a similar fashion as previously ~ c~ e-1 It can b6 appreciated that the track6 illu6trated may include cnnce~ d WO 951177~0 2 1 7 5 5 5 6 PCI/US94114784 o tracks pursuant to the present invention. Also, the pre-gap GP, mid-gaps Gl, G2 and end-gap GE are provided as ~liq~ll.qqad in FIGS. 5 and 6.
FIGS. 7 and 9 illustrate another representative 5 configuration of another track layout ~ rtohla for use with the present invention. The configurations of FIGS. 7 and 9 illustrate tracks without gaps. It can be appreciated that the tracks illUbl- dled may include con-~e~l~-l tracks ~ul ~ua l~ to the present invention. Particularly, FIG. 7 illustrates the track 202 10 abutting the track 204. ~so, the track 204 is illustrated abutting the track 206. The recording areas 2i2, 214, 216 are provided with respective start positions 222, 224, 226, as previously ~lix~ e~l. The pre-gap and post-gap of the s~L~ liv~ configurations can exist or not exist as the case 1~ may be. For OY~mP1~, FIGS ~, 7, 8, 9 illustrate a pre-gap GP
existing and not existing, similarly FIGS. 6, 7, 8, 9 illustrate the end-gap GE existing and not existing. The pre-gaps GP are i-lantifi~d by labels 102 and 104. The end-gaps GE are i~nt~ifiad by numerals 106 and 108.
FIG. 10 is a srhf~m~tic illustrating more particularly a c~nc~lod track disposed within a gap G1 as practiced by the present invention. FIG. 10 iillustrates a data track 202 and a data track 204 having a gap Gl there between. The data track 202 has a recording area 212 and a start position 222. The data 2~ tracks 202, 204 are preceded by a start location 102. The first data track 202 has a begin &~II".. l~ til~n location 302 aligned in the general vicinity of the start position 222. The data track 204 has a recording area 214 and a start position 224. Between ~0 95/17750 2 1 7 5 5 5 6 PCT/US94114784 the data tracks 202, 204, is the concealed track C202. The ccn~led track C202 comprises a recording area C212 and a start position C222. The gap Gl between the data tracks 202, - 204 includes the entirety of the cnn~ d track C202 and its 6 adjacent gaps GC1, Gc2~ It can be ~ iaLed by those skilled in the art that the gaps Gcl~ Gc2 ~.~Ror;~ted with the concealed track C202 can be of whatever rlimPnRione are desired with respect to time or location. Also, it can be appreciated by those skilled in the art that the gaps can be ~liRrl~-~ed or omitted 10 altogether such that the data track 202 abuts against the c--n( ~ d track C202, and the cnn( e~lPd track C202 abuts against the other data track 204, thus, providing an ~mho~limPnt without any gaps.
FIG. 11 illustrates yet another embodiment of the present v~liull with the cnnce~l~d track C202 at the end of the data m~;11m FIG. 11 illustrates a plurality of data tracks 201-20N
as illustrated with a break away. The break away provides that any number of data tracks can be disposed between the iLustrated data tracks 202, 20N. The cnn~e~ d track C202 20 having a recording area C212 and a start position C222 is disposed between the last data track 20N and the stop location 106. The gap GE between the last data track 20N and the stop lccation 106 provides for the full ~lim~n.cinn of the cnnt~ d track C202 and its respective gaps GC1, GCE- As previously 2~ ~liRcllRRe~ the le~e-,Liv-d gaps GC1~ GCE can be altered in si~e or f~limin~ted completely.
FIG. 12 illustrates yet another ~mho~im~nt of the present invention wherein two ~nnce~l~d tracks C202, C204 are placed WO 95/~7750 2 1 7 5 5 5 6 PCTIUS94/14784 o between two data tracks 202, 204. The concealed tracks C202, C204 are, for ~Y~m~le, placed near the beginning of the storage medium so as to be between the first two data tracks 202, 204.
The cnnre~ d tracks C202, C204 and their associated gaps GC1~
5 GC2, Gc3 fill the entire gap Gl between the first data track 202 and the second data track 204. Each cnnce~lR-l aata track C202, C204 has its recording area C212, C214 and start position C222, C224, reb~e~,iv~ly.
FIG. 13 illustrates yet another embodiment of the present 10 invention wherein a plurality of cnnre~l-?d tracks C202, C204 are located at the end of a storage medium. FIG. 13 illustrates two of the plurality of concealed tracks C20N-1, C20N disposed between the last data track 20N and the stop location 106. The cnnce~led data tracks C20N-1, C20N are disposed in the end 15 gap GE. The entire (lim~n~inn of the end gap GE includes the first cnnrP~led gap GC1, the concP~led track C20N-1, the second cnnc~ d gap Gc2~ the cnnre~l~d track C20N and the gap GCE.
In its srhem~tic r~ R~ inn, the Rmhorlim~nt of the invention illu~Ll~led in FIG. 13 eYpands the entire length of the 20 storage medium from the start location 102 to the stop location 106. It can be appreciated that numerous conre~led tracks can be placed in each respective gap between data tracks. Also, it can be appreciated that numerous cnnre~led tracks can be placed in the pre-gap just as easily as has been illustrated in the 25 mid-gaps and the end-gap.
Atl~it;nn~l advantages and mo~ifin~tinn will readily occur to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative ~0 95/17750 2 1 7 5 5 5 6 PCT~US94/14784 apparatus, and the illu~ Liv~ PYslmpl~s~ shown and described herein. Accordingly, the d~allu~ may be made from the details without departing from the ~pirit or scope of the disclosed general i~lV~ iVt~ concept.
of the data recording area for the respective track. The storage 10 medium is engaged at the begin commllnir~tion location for either recording or reproducing data for each l~b~e. li~,~ data track.
The method of the present invention comprising the steps of (a) determining the position of the start location on the 15 storage medium, (b) d~ illg the position of the stop location on the storage medium, (c) po.eitinnine at least one data track on the storage medium between the start location and the stop location such that the data track has, adjacent thereto, enough space or time for accepting a cnn~e~l~d data track, and 20 (d) hllpl~billg data on the storage medium for generating the çnnre~led track having a hidden recording area such that the hidden recording area contains çnn~PAl~d data which can be accessed upon demand for t~ranscription to another medium or for playback.
25 The present invention can be adapted for use with different storage media such as, for ~Y~m~l~, a compact disk, a read-only memory compact disk, a mini-disk, a photo compact disk or the like.
~WO 95/~7750 2 1 7 5 5 5 6 PCT/US94J14784 Particularly, the step of impressing data on the storage ~edium for generating the ~r)n~e~l~d track further comprises the step of generating the conres3l~d track by identifying a position within the gap relative t~ either location or time for 5 working with a player or transcriber and hll~ illg the cnnce~ d track on the storage medium at the i~l~ntifiPd position. The step of hllp~ g the c--nrP~lPd track on the storage medium at the i~rntifi~d position includes i",,uie~billg a recording area within the cnnre~led track, and illlple~i"g a 10 s~art position within the con<.~lPd track for in~ir~tinF the location where the recording area begins for the conce~led track~ The ætep of identifying a position within the gap comprises the step of identifying a position with respect to the begi~ l~.""~l""l;r~qtinn location or with respect to the start 15 location or alternately with respect to the start position.
RRT~li' Dl~ CRIE'TION OF T~ DRAWINGS
The ~c~mr~nying drawings which are ill~,ul~ul~lLdd in and c~n~titllte a part of the Pperifirs~tir,n, illustrate a preferred embodiment of the invention an~ together with the general 20 description of the illv~l~Lioll given above and the detailed description of the preferred embodiment given below, serve to explain the prinrirl~ of the invention.
FIG. 1 is a partial cross section perspective view of a conventional compact disk (Prior Art).
25 FIG. 2 is a flow diagram illustrating a preferred ~mho~lim~nt of the present invention.
g FIG. 3 is a flow diagram illustrating the sequence of track counts on a conventional CD (Prior Art).
FIG. 4 is a flow diagram of another embodiment of the method of the present invention.
5 FIG. 5 is a Sl`h~?mAtiC illustration of a representative configuration embodying a track layout A-lArt~hl~ for use with the present invention.
FIG. 6 is a generic illustration of the ~ sell~aLiv~
configuration as illustrated in FIG. 5.
FIG. 7 illustrates a l~ ative configuration of a track layout A-lApt~hlP for use with the present invention.
FIG. 8 illustrates an Pmhorlimant of a representative configuration wherein the track and recording areas are ;~Pnti"Al areas.
FIG. 9 illustrates another ~ se~ liv~ configuration of another track layout adaptable for use with the present invention.
FIG. 10 is a ærh~mAti~ illustrating more particularly a cnn~eAl~d track disposed within a gap as practiced by the 20 present illV~lli,iUll.
FIG. 11 illustrates yet another ~mhodim~nt of the present invention with the con(~e~l~d track at the end of the data medium.
FIG. 12 illustrates yet another ~mho~im~nt of the present 25 invention wherein two cnnl~Aled tracks are placed between two data tracks.
~WO 9S117750 2 1 7 5 5 5 6 PCTIUS94114784 FIG. 13 illustrates yet another embodiment of the present invention wherein a plurality of cnnr~led tracks are located at the end of a storage m~ m FIG. 14 is a flow chart illustrating one embodiment of the 5 method of masking data on a storage medium as taught by the present invention.
FIG. 15 is another flow chart illustrating a more detailed embodiment of the method of masking data on a storage medium as taught by the present invention.
10 The above general description and the following detailed dts. liluLiu-l are merely illubl~Liv~ of the generic invention, and iti~)n~l modes, advantages, an~ particulars of this invention will be readily suggested to those skilled in the art without departing from the spirit and scope of the invention.
DT'~.TATT,T'~.T) DESI~RTPTION OF
'l'h~ J~ Kl?h'.T) Ti'.MP~ODIMENTS
Reference will now be made in detail to the present LJ~dr.~ d embodiments of the invention as described in the ~cc~ mr~nying drawings.
20 The .presently ~dr~ d application of the present invention is for use with standard audio compact discs as found in, for f~mrle, music and record stores. However, the present invention can be adapted for use in other related storage media such as, for ~Y~mrlP, CD-ROM discs, mini-compact discs, 25 singlc~ m or multi-session Photo CDs, as well as 80-mm-~ m~ter CD discs. A wide selection of CD storage media is available for entert~inrn-~nt, ecl~ t;~)n, and business.
A typical disc can hold over 650 megabytes (MB) of information WO 95/17750 2 1 7 5 5 5 6 PCT/US941147~4 ~
-- the equivalent of 270,000 pages of text, up to eight hours of speech and music (depending on the sound quality), hundreds of high-rP~oll1ti~m images, or any comhin~ti~ n of text, sound and graphics.
Standard music CDs provide sound and music recorded in a format typically referred to as digital audio. The present invention is especially adaptable for use in the digital audio format. Prior formats for storage media are silent with respect to cfn-~e~linE tracks or data between or adjacent to ~3rcP~ihlP
10 tracks or data available for use.
Developers and industry producers have implf~m~nt.qd numerous and varied standards or protocols. Of particular relevance are the CD standards co-developed by Philips and Sony for the digital audio i~ormat. The Phillips/Sony digital 15 audio format is called CD Digital Audio." The Philips/Sony CD
Digital Audio te~hnology is available for license from Philips in what is called the "Red Book." The Red Book standards have become the industry standards in the digital audio industry.
T_e present invention providles a ~ienifi~nt adv~ncPm~nt to all 20 known industry standards for digital audio te-~hn~-lngy, inrlllrlinE the Red Book stanclards.
Further, the present invention has application to other known standards or protocols. Standards of relevance and possible application to the pr~sent invention are the Philips/Sony 2~ CD-ROM standards, known as the Yellow Book; the Philips/Sony CD-I standards, known the Green Book; the Philips/Sony Recordable CD standards, known as the Orange Book; the Philips/Sony CD-Video/Laser Disc standards; the ~ 0 95117750 2 1 7 5 5 5 6 PCT/US94/14784 Pllilips/Sony CD-ROM XA standards; the Philips/Sony CD-I
Ready standards; the Philips/Sony CD-I Bridge standards; the P~ilips/Kodak Photo CD standard; and the Philips/JVC Video CD sperific~tion standard, known as the White Book.
5 It is known in the industry to use a pre-gap on the compact disk. The pre-gap is a buffer between a start cr,mmllnic~tinn location on the ¢D and a first start mark indicative of a beginning location for the data recording area for the first track on the CD. The stau^t co,~ ..lic~tic-n location on 10 the CD is typically closer to the than the perimeter of the CD so that the CD is transcribed in an outward PYr~n(lin~ radial di~rection. The pre-gap is provided, indeed required, on CD's to assure that the player can align itself with the start mark.
Typically, the pre-gap is two (2) seconds on a CD. The pre-gap 15 can be termed a buffer.
The CD player provides an indexing merh~ni~m The inrl~Yi~ m~rh~ni~m reads from the CD a table of cnnhont~
The table of contents ~R~oci~ted with the CD determines, for m~l~, the start and finish location, and ~ e.,Live times for 20 the different tracks or groupings of data on the CD. The CD
table of contents information is read by the player and stored in memory. Based upon the table of contents information from the CD, the memory in the player knows, for PY~mrl~, where each track begins, each track ends and the length of the 2i respective track. Typically, the table of contents has the track lnr~tinn~ Each track has a b~innin~ index point and may have an ending in~ex point. Typically, the track will begin at index 1 and end at index 0. Thus, the begin play point is at WO 95/17750 2 1 7 5 5 5 6 PCIIUS94/14784 o track 1, index 1. If there are X tracks on a CD, the last play location would be track X, index 0. The location iflAntifi~d by track 1, index 1 is the begin play point.
H~l ~loro~ ~, the pre-gap provided a location point for 5 aligning the CD in the player. The CD players are lu~lulu~ lllled to locate the end of the pre-gap location, i.e. the predefined begin play location. Thereafter, the table of contents is read by the player and the player haæ been discovered to be ~lu~ ed to remember the lor~tilmR of each of the tracks on 10 the CD. It is advantageous to use the pre-gap as an auxiliary recording zone. Thus, a conventional CD could be divided into two (2) recording zones, the pre-gap zone and the normal zone.
Using the pre-gap zone provides a new realm of filn(~ti~)n~lity to the standard CD player market. No changes or 15 adj-lQ~nAntR need to be ma~e to the CD player whatsoever.
Typically, a CD player can access the pre-gap by pressing and holding the rewind button so that the player scrûlls to the heginnin~ of a pre-track. The length of the pre-track can be set during the time the CD's are m~nllfs~tllred. For ~Y~mrle, in a 20 conventional CD, to use the method of the present invention, termed the Justice SoundboardTM pre-track, the CD is inserted and the play button is pressled. After the play button engages the CD and the CD is aligned, the table of contents is read and the first track is pl~s~ ed for ~luCe~billg, the rewind button is 25 pressed and held providing that the player scrolls to the beginnin~ of the Justice Soundboard~ pre-track. When the front of the pre-track location is reached, the button can be released, and the pre-track zone data will be transcribed by the ~WO 95/17750 2 1 7 5 5 5 6 PCT/US94/14784 player. This provides the availability of multiple independent track recording on a conventional CD.
FIG. 2 is a flow diagram illustrating the method of the present invention. The method provides for locating the begin 5 play point on the medium sllffiriPntly remote from the first play l~cation for accepting data between the begin play point and the first play location. Data is h~ s~ed on the medium in the pretrack location, i.e., between tlle first play location and the begin play point. Then, data is placed on the media as normally 10 done, for PYamrl~, between the first play location and the last play location. Further, the met~od provides for an~FinF the player for locating the begin play point. The player can be further engaged to locate the first play location. Thereafter, the player is directed to transcribe the data from the media between 15 the first play location and the begin play point, i.e., from the pre-gap zone. Thereafter, the player is provided access to transcribe the J~ F data as normally would be transcribed from a CD by a player.
FIG. 4 illustrates another embodiment of the invention of 20 the present aprli(at~n The r~ethod ;tl~ntifi.od in the flow diagram ill.~l~ ed in FIG. 4 provides for locating the begin lPlay point on the media sllffi~ ntJy remLote from the first play location for accepting data in a pretrack or pre-gap zone. Data is i~ ed on the pretrack or pre-gap zone which is located 25 between the first play location and the begin play point.
Further, as normally done on CD media, data is impressed between the begin play point and the end play point. Typically, this is done in a series of tracks. Thereafter, the player is WO 95/17750 2 1 7 5 5 5 6 PCT/US94/14784 o engaged for locating the begi~n play point. After the begin play point is located, the player is further engaged to locate the first play location. The player can transcribe the data from the media between the first play location and the begin play location 5 so that the pretrack data is transcribed from the pre-gap zone.
Lastly, the player can transcribe the data as normally transcribed from between the first play location and the last play location. It can be appreciated that this same technique can be used in any medium. It is not just the CD medium in 10 which the technique can be incorporated.
FIG. 5 is a s(~hPm~tic illustration of a representative configuration embodying a track layout ~rt~hl.o for use with the present invention. FIG. 5 illustrates a storage medium having three data tracks 202, 204, 206. The data tracks 202, 15 204, 206 are preceded by a start location 102, and tPrmin~ted by a stop location 106. Between the data tracks 202, 204, 206 and the start location 102 and the stop location 106 are gaps G.
More particularly, the gaps G may be defined as a pre-gap Gp, a first mid-gap Gl, a second mid-gap G2 and an end gap GE. A
20 begin commllnic~qtion location 302 is typically provided for the first data track 202. Further, a begin commllnir~ti- n location 302, 304~ 306 may be provided for each lt~b~e~ ~iV~ data track 202, 204, 206. It can be appreciated by those skilled in the art that the begin commllnir~tirn location 302 may be the only 25 such location required. For IPY~m~ , the begin communication location 302 is typically ad~pted for use with a player or a transcriber so that the player or tr~n~rrihPr will know where to begin removing data from the storage medium. Each data ~WO 95117750 2 1 7 5 5 5 6 PCT/US94/14784 track 202, 204 206 has its respective recording area 212, 214, 2~6. Similarly, each recording area 212, 214, 216 has it6 respective start position 222, 224, 226.
- FIG. 6 is a generic illustration of the represe~ iv~
5 ccnfiguration as illustrated in FIG. 5. FIG. 6 illustrates that a plurality of tracks can be adapted for use with the storage medium and in conjunction with t~e present invention. FIG. 6 illustrates data tracks ranging from data track 1 through data track N. The data tracks provide for a following gap G1 10 through GX and GE. Of particular interest i6 the break away portion of FIG. 6 which illustrates that the data track 204 is spaced in time or distance from the subsequent illu~LIdled data track 21X. The data track 21X is po~itinn~d so as to be separated from data track 21X+1 by the gap GX. The data 15 track 21X+1 is spaced remotely from the la6t data track 21N.
T~e last data track 21N is illustrated being adjacent the end gap GE. The end gap GE s~a~ s tl1e data track 21N from the 6top location 106.
It can be appreciated by those skilled in the art that the 20 representative configurations adapted for use with the present iLvention can vary. FIGS. 7, 8 and 9 illu6trate variations of representative configurations whicl1 can be adapted for use with the present invention. FIG. 8 illu6trates an embodiment of a representative configuration wherein the track and recording 25 areas are i(l~nti~l areas 232, 234, 236. The start position 222, 224, 226 for the ~ 6~,liv~ track/recording areas 232, 234, 236 are used in a similar fashion as previously ~ c~ e-1 It can b6 appreciated that the track6 illu6trated may include cnnce~ d WO 951177~0 2 1 7 5 5 5 6 PCI/US94114784 o tracks pursuant to the present invention. Also, the pre-gap GP, mid-gaps Gl, G2 and end-gap GE are provided as ~liq~ll.qqad in FIGS. 5 and 6.
FIGS. 7 and 9 illustrate another representative 5 configuration of another track layout ~ rtohla for use with the present invention. The configurations of FIGS. 7 and 9 illustrate tracks without gaps. It can be appreciated that the tracks illUbl- dled may include con-~e~l~-l tracks ~ul ~ua l~ to the present invention. Particularly, FIG. 7 illustrates the track 202 10 abutting the track 204. ~so, the track 204 is illustrated abutting the track 206. The recording areas 2i2, 214, 216 are provided with respective start positions 222, 224, 226, as previously ~lix~ e~l. The pre-gap and post-gap of the s~L~ liv~ configurations can exist or not exist as the case 1~ may be. For OY~mP1~, FIGS ~, 7, 8, 9 illustrate a pre-gap GP
existing and not existing, similarly FIGS. 6, 7, 8, 9 illustrate the end-gap GE existing and not existing. The pre-gaps GP are i-lantifi~d by labels 102 and 104. The end-gaps GE are i~nt~ifiad by numerals 106 and 108.
FIG. 10 is a srhf~m~tic illustrating more particularly a c~nc~lod track disposed within a gap G1 as practiced by the present invention. FIG. 10 iillustrates a data track 202 and a data track 204 having a gap Gl there between. The data track 202 has a recording area 212 and a start position 222. The data 2~ tracks 202, 204 are preceded by a start location 102. The first data track 202 has a begin &~II".. l~ til~n location 302 aligned in the general vicinity of the start position 222. The data track 204 has a recording area 214 and a start position 224. Between ~0 95/17750 2 1 7 5 5 5 6 PCT/US94114784 the data tracks 202, 204, is the concealed track C202. The ccn~led track C202 comprises a recording area C212 and a start position C222. The gap Gl between the data tracks 202, - 204 includes the entirety of the cnn~ d track C202 and its 6 adjacent gaps GC1, Gc2~ It can be ~ iaLed by those skilled in the art that the gaps Gcl~ Gc2 ~.~Ror;~ted with the concealed track C202 can be of whatever rlimPnRione are desired with respect to time or location. Also, it can be appreciated by those skilled in the art that the gaps can be ~liRrl~-~ed or omitted 10 altogether such that the data track 202 abuts against the c--n( ~ d track C202, and the cnn( e~lPd track C202 abuts against the other data track 204, thus, providing an ~mho~limPnt without any gaps.
FIG. 11 illustrates yet another embodiment of the present v~liull with the cnnce~l~d track C202 at the end of the data m~;11m FIG. 11 illustrates a plurality of data tracks 201-20N
as illustrated with a break away. The break away provides that any number of data tracks can be disposed between the iLustrated data tracks 202, 20N. The cnn~e~ d track C202 20 having a recording area C212 and a start position C222 is disposed between the last data track 20N and the stop location 106. The gap GE between the last data track 20N and the stop lccation 106 provides for the full ~lim~n.cinn of the cnnt~ d track C202 and its respective gaps GC1, GCE- As previously 2~ ~liRcllRRe~ the le~e-,Liv-d gaps GC1~ GCE can be altered in si~e or f~limin~ted completely.
FIG. 12 illustrates yet another ~mho~im~nt of the present invention wherein two ~nnce~l~d tracks C202, C204 are placed WO 95/~7750 2 1 7 5 5 5 6 PCTIUS94/14784 o between two data tracks 202, 204. The concealed tracks C202, C204 are, for ~Y~m~le, placed near the beginning of the storage medium so as to be between the first two data tracks 202, 204.
The cnnre~ d tracks C202, C204 and their associated gaps GC1~
5 GC2, Gc3 fill the entire gap Gl between the first data track 202 and the second data track 204. Each cnnce~lR-l aata track C202, C204 has its recording area C212, C214 and start position C222, C224, reb~e~,iv~ly.
FIG. 13 illustrates yet another embodiment of the present 10 invention wherein a plurality of cnnre~l-?d tracks C202, C204 are located at the end of a storage medium. FIG. 13 illustrates two of the plurality of concealed tracks C20N-1, C20N disposed between the last data track 20N and the stop location 106. The cnnce~led data tracks C20N-1, C20N are disposed in the end 15 gap GE. The entire (lim~n~inn of the end gap GE includes the first cnnrP~led gap GC1, the concP~led track C20N-1, the second cnnc~ d gap Gc2~ the cnnre~l~d track C20N and the gap GCE.
In its srhem~tic r~ R~ inn, the Rmhorlim~nt of the invention illu~Ll~led in FIG. 13 eYpands the entire length of the 20 storage medium from the start location 102 to the stop location 106. It can be appreciated that numerous conre~led tracks can be placed in each respective gap between data tracks. Also, it can be appreciated that numerous cnnre~led tracks can be placed in the pre-gap just as easily as has been illustrated in the 25 mid-gaps and the end-gap.
Atl~it;nn~l advantages and mo~ifin~tinn will readily occur to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative ~0 95/17750 2 1 7 5 5 5 6 PCT~US94/14784 apparatus, and the illu~ Liv~ PYslmpl~s~ shown and described herein. Accordingly, the d~allu~ may be made from the details without departing from the ~pirit or scope of the disclosed general i~lV~ iVt~ concept.
Claims (10)
1. A method of recording data on a magneto-optical compact disk, mini-disk or other magneto-optical storage medium for concealing the data for selective playback upon express demand, the data operatively associated with the disk, the disk adapted for communication with a player or transcriber such that the disk has a start communication location and a terminate communication location with at least one track therebetween, each track including a data recording area for executing at least one of recording and reproducing the data, and each track including a start mark indicative of a beginning location for the data recording area for that track, the start communication location precedes the first start mark for the first track, and the stop communication location follows the last data recording area for the last track, the disk has a predefined begin play location which directs the player to begin playing at the begin play location such that the begin play location is at or in close proximity to the first start mark indicative of the beginning position for the first track, and the start mark for each track is identifiable by the player for determining the location on the magneto-optical medium to begin reproducing data for playback from the respective track, such that upon normal playback the disk is engaged for communication with the player at the begin play location and the data begins to be removed from the disk by the player at the first start mark of the first track which track contains the first data recording area, and further upon demand additional data can be removed from each data recording area on the disk by the player directed by the start mark for each track identified by communication between the player and the disk for determining the location on the disk to begin reproducing data for playback from the data recording area of each respective track, the method comprising the steps of:
(a) setting the position of the start communication location on the disk, (b) setting the position of the terminate communication location on the disk, (c) setting the position of the begin play location on the disk remote from the start communication location such that the begin play location initiates communication between the disk and the player, (d) disengaging along the disk in a direction remote from the begin play location and toward the start communication location sufficient to define a pre-gap track on the disk, the pre-gap track being between the begin play location and the start communication location for receiving data for recording and reproduction, the pre-gap track having a predetermined start location and end location based upon the amount of data to be impressed in the pre-gap track, (e) determining the size of the pre-gap track by at least one of time measurement along the magneto-optical medium or distance measurement along the magneto-optical medium, (f) impressing data on the disk within the pre-gap track for generating hidden data since the data in the pre-gap track is not affiliated with any combination of track and respective start mark which start mark is used by the player to receive direction for playing the respective track thus rendering the pre-gap track, and the associated hidden data, undetectable and concealed from the player, (g) impressing data on the disk in the data recording area associated with each combination of track and respective start mark such that the start mark comprises information indicative of a beginning position for the respective track, (h) engaging the player in communication with the disk for locating the begin play location, (i) further engaging the player to locate the start location of the pre-gap track, (j) demanding the player to play the hidden data from the pre-gap track between the start communication location and the begin play location, and (k) transcribing the player past the begin play location for playing the data from the disk between the begin play location and the terminate communication location.
(a) setting the position of the start communication location on the disk, (b) setting the position of the terminate communication location on the disk, (c) setting the position of the begin play location on the disk remote from the start communication location such that the begin play location initiates communication between the disk and the player, (d) disengaging along the disk in a direction remote from the begin play location and toward the start communication location sufficient to define a pre-gap track on the disk, the pre-gap track being between the begin play location and the start communication location for receiving data for recording and reproduction, the pre-gap track having a predetermined start location and end location based upon the amount of data to be impressed in the pre-gap track, (e) determining the size of the pre-gap track by at least one of time measurement along the magneto-optical medium or distance measurement along the magneto-optical medium, (f) impressing data on the disk within the pre-gap track for generating hidden data since the data in the pre-gap track is not affiliated with any combination of track and respective start mark which start mark is used by the player to receive direction for playing the respective track thus rendering the pre-gap track, and the associated hidden data, undetectable and concealed from the player, (g) impressing data on the disk in the data recording area associated with each combination of track and respective start mark such that the start mark comprises information indicative of a beginning position for the respective track, (h) engaging the player in communication with the disk for locating the begin play location, (i) further engaging the player to locate the start location of the pre-gap track, (j) demanding the player to play the hidden data from the pre-gap track between the start communication location and the begin play location, and (k) transcribing the player past the begin play location for playing the data from the disk between the begin play location and the terminate communication location.
2. A method of masking data on an magneto-optical medium for selective playback upon demand or for transcription to another medium, the magneto-optical medium adapted for communication with a player or transcriber such that the magneto-optical medium has a start location and a stop location with at least one data track therebetween, each data track including a data recording area for executing at least one of recording and reproducing the data, and each track including a start position indicative of a beginning location for the data recording area for that track, the start location precedes the first start position for the first track for at least one of location or time, and the stop location follows the last data recording area for the last track for at least one of location or time, the magneto-optical medium has a begin communication location at or in close proximity to the start position indicating the beginning of the data recording area for the respective track, the first start position is indicative of the beginning of the data recording area for the first track and the start position for each subsequent track, if any, is indicative of the beginning of the data recording area for the respective track, such that the magneto-optical medium is engaged at the begin communication location for executing at least one of recording and reproducing data for each respective data track, the method comprising the steps of:
(a) determining the position of the start location on the magneto-optical medium, (b) determining the position of the stop location on the magneto-optical medium, (c) positioning at least one data track on the storage medium between the start location and the stop location such that the data track has, adjacent thereto, at least one of sufficient location or time for accepting a concealed data track which sufficient location or time is defined as a gap, (d) impressing data on the magneto-optical medium and within the gap for generating the concealed track having a hidden recording area such that the hidden recording area is located after the start location on the storage medium and contains concealed data which can be accessed upon demand for transcription to another medium or for playback.
(a) determining the position of the start location on the magneto-optical medium, (b) determining the position of the stop location on the magneto-optical medium, (c) positioning at least one data track on the storage medium between the start location and the stop location such that the data track has, adjacent thereto, at least one of sufficient location or time for accepting a concealed data track which sufficient location or time is defined as a gap, (d) impressing data on the magneto-optical medium and within the gap for generating the concealed track having a hidden recording area such that the hidden recording area is located after the start location on the storage medium and contains concealed data which can be accessed upon demand for transcription to another medium or for playback.
3. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 2 further comprising the step of using a compact disk.
4. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 3 wherein the step of using a compact disk as the storage medium comprises using a read-only memory compact disk.
5. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 2 further comprising the step of using a mini-disk.
6. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 2 further comprising the step of using a photo compact disk.
7. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 2 wherein the step of impressing data on the magneto-optical medium for generating the concealed track further comprises the step of generating the concealed track comprising the steps of:
(a) identifying a position within the gap relative to at least one of location or time for operative association with a player/transcriber, (b) impressing the concealed track on the magneto-optical medium at the identified position comprising the steps of:
(1) impressing a recording area within the concealed track, and (2) impressing a start position within the concealed track for indicating the location where the recording area begins for the concealed track.
(a) identifying a position within the gap relative to at least one of location or time for operative association with a player/transcriber, (b) impressing the concealed track on the magneto-optical medium at the identified position comprising the steps of:
(1) impressing a recording area within the concealed track, and (2) impressing a start position within the concealed track for indicating the location where the recording area begins for the concealed track.
8. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 7 wherein the step of identifying a position within the gap comprises the step of identifying a position with respect to the begin communication location.
9. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 7 wherein the step of identifying a position within the gap comprises the step of identifying a position with respect to the start location.
10. The method of masking data on a magneto-optical medium for selective playback upon demand or for transcription to another medium as defined in claim 7 wherein the step of identifying a position within the gap comprises the step of identifying a position with respect to the start position.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17284993A | 1993-12-22 | 1993-12-22 | |
| US08/343,637 US5467327A (en) | 1993-12-22 | 1994-11-22 | Method of masking data on a storage medium |
| US08/172,849 | 1994-11-22 | ||
| US08/343,637 | 1994-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2175556A1 true CA2175556A1 (en) | 1995-06-29 |
Family
ID=26868527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002175556A Abandoned CA2175556A1 (en) | 1993-12-22 | 1994-12-19 | Method of masking data on a storage medium |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US5467327A (en) |
| EP (1) | EP0736212A4 (en) |
| JP (1) | JPH09507111A (en) |
| AU (1) | AU1517095A (en) |
| CA (1) | CA2175556A1 (en) |
| WO (1) | WO1995017750A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5467327A (en) * | 1993-12-22 | 1995-11-14 | Jamail; Randall | Method of masking data on a storage medium |
| US5808974A (en) * | 1993-12-22 | 1998-09-15 | Jamail; Randall H. | Method of masking data on a storage medium using a directory |
| AU3914895A (en) * | 1994-11-30 | 1996-06-06 | Sony Corporation | Data recording medium and record/playback apparatus using the data recording medium |
| US7103261B2 (en) * | 2001-06-04 | 2006-09-05 | William Grecia | Consumer friendly error correcting formating method for white book 2.0 video compact disc with CD-DA red book audio tracks |
| US20040174570A1 (en) * | 2002-12-02 | 2004-09-09 | Plunkett Richard Thomas | Variable size dither matrix usage |
| US7404616B2 (en) * | 2002-12-02 | 2008-07-29 | Silverbrook Research Pty Ltd | Printhead cartridge having an integrated circuit storing an identifier for use in mobile device |
| US7121639B2 (en) * | 2002-12-02 | 2006-10-17 | Silverbrook Research Pty Ltd | Data rate equalisation to account for relatively different printhead widths |
| US7740347B2 (en) | 2002-12-02 | 2010-06-22 | Silverbrook Research Pty Ltd | Ink usage tracking in a cartridge for a mobile device |
| US20050210179A1 (en) * | 2002-12-02 | 2005-09-22 | Walmsley Simon R | Integrated circuit having random clock or random delay |
| US6859160B1 (en) * | 2003-09-09 | 2005-02-22 | Lockheed Martin Corporation | System for estimating receiver utilization |
| DE102004009273A1 (en) * | 2004-02-26 | 2005-09-15 | Robert Bosch Gmbh | Navigation system with a drive for reading navigation data and method for operating a navigation system |
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| NL187413C (en) * | 1978-03-16 | 1991-09-16 | Philips Nv | REGISTRATION CARRIER, REGISTRATION CARRIER, METHOD FOR REGISTRATION CARRIER BODY AND DEVICE FOR CARRYING OUT A METHOD AND READING A REGISTRATED CARRIER. |
| JPS5687237A (en) * | 1979-12-14 | 1981-07-15 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing or reproducing device |
| US4719615A (en) * | 1983-08-22 | 1988-01-12 | Optical Data, Inc. | Erasable optical data storage medium |
| USRE34475E (en) * | 1984-07-02 | 1993-12-14 | U.S. Philips Corporation | Apparatus for automatically reproducing preferred selections from a record carrier |
| JPS6132265A (en) * | 1984-07-23 | 1986-02-14 | Hitachi Ltd | Recording control circuit of optical information recording and reproducing device |
| JP2512706B2 (en) * | 1985-05-27 | 1996-07-03 | 日立マクセル株式会社 | Optical information recording medium and manufacturing method thereof |
| US4872068A (en) * | 1987-01-28 | 1989-10-03 | Pioneer Electronic Corporation | Disk playing method resulting in reduced start-up time |
| DE3732983A1 (en) * | 1987-09-30 | 1989-04-13 | Thomson Brandt Gmbh | CD PLAYER WITH A MEMORY |
| US5036511A (en) * | 1988-02-05 | 1991-07-30 | Tandy Corporation | Recording method and apparatus |
| US5200948A (en) * | 1988-02-05 | 1993-04-06 | Tandy Corporation | Recording method and apparatus |
| DE3803982A1 (en) * | 1988-02-10 | 1990-01-25 | Igor Groza | Data carrier with duplication prevention |
| JP2680591B2 (en) * | 1988-02-15 | 1997-11-19 | シャープ株式会社 | Method for manufacturing optical memory device |
| US5103317A (en) * | 1988-04-25 | 1992-04-07 | Pioneer Electronic Corporation | Apparatus for playing recording medium having a selective special reproduction playback mode |
| DE3828519A1 (en) * | 1988-08-23 | 1990-03-15 | Cirbus Rudolf | Data disk with shutter |
| JP2637815B2 (en) * | 1989-02-13 | 1997-08-06 | パイオニア株式会社 | Information playback device |
| JP3060460B2 (en) * | 1989-05-15 | 2000-07-10 | ソニー株式会社 | Disk, disk recording device, and disk recording / reproducing device |
| KR930006580B1 (en) * | 1989-05-26 | 1993-07-21 | 샤프 가부시끼가이샤 | Recording and reproducing device |
| MY105953A (en) * | 1989-07-24 | 1995-02-28 | Taiyo Yuden Kk | Optical information recording medium and recording method. |
| US5255260A (en) * | 1989-07-28 | 1993-10-19 | Matsushita Electric Industrial Co., Ltd. | Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads |
| GB2235808A (en) * | 1989-08-11 | 1991-03-13 | Ernest Peter Small | Optically readable data carriers |
| EP0453108B2 (en) * | 1990-04-17 | 2003-07-02 | Pioneer Electronic Corporation | Player for audio disk and memory disk |
| JP2801739B2 (en) * | 1990-05-15 | 1998-09-21 | パイオニア株式会社 | Recording / reproducing method of multilayer recording film |
| JPH0467490A (en) * | 1990-07-06 | 1992-03-03 | Pioneer Electron Corp | Information storing device and information reproducing device |
| JP3032587B2 (en) * | 1990-12-28 | 2000-04-17 | ティーディーケイ株式会社 | Optical disc manufacturing method |
| US5293568A (en) * | 1991-06-28 | 1994-03-08 | Olympus Optical Co., Ltd. | Track-address judging method |
| US5297099A (en) * | 1991-07-10 | 1994-03-22 | Dallas Semiconductor Corp. | Integrated circuit with both battery-powered and signal-line-powered areas |
| JPH06203479A (en) * | 1992-12-30 | 1994-07-22 | Sony Corp | Recording medium and navigation system |
| JP3427410B2 (en) * | 1993-02-24 | 2003-07-14 | ソニー株式会社 | Optical disk recording device and optical disk reproducing device |
| JP2853724B2 (en) * | 1993-06-30 | 1999-02-03 | 日本ビクター株式会社 | Optical recording medium, its manufacturing method and its reproducing apparatus |
| US5539711A (en) * | 1993-11-08 | 1996-07-23 | Sony Corporation | Optical disc drive apparatus |
| US5467327A (en) * | 1993-12-22 | 1995-11-14 | Jamail; Randall | Method of masking data on a storage medium |
| US5471443A (en) * | 1993-12-22 | 1995-11-28 | Randall Jamail | Method of selectively concealing magneto-optical compact disk data for playback upon demand |
| US5526338A (en) * | 1995-03-10 | 1996-06-11 | Yeda Research & Development Co. Ltd. | Method and apparatus for storage and retrieval with multilayer optical disks |
-
1994
- 1994-11-22 US US08/343,637 patent/US5467327A/en not_active Expired - Fee Related
- 1994-12-19 EP EP95906688A patent/EP0736212A4/en not_active Withdrawn
- 1994-12-19 WO PCT/US1994/014784 patent/WO1995017750A1/en not_active Application Discontinuation
- 1994-12-19 AU AU15170/95A patent/AU1517095A/en not_active Abandoned
- 1994-12-19 JP JP7517599A patent/JPH09507111A/en active Pending
- 1994-12-19 CA CA002175556A patent/CA2175556A1/en not_active Abandoned
-
1995
- 1995-08-02 US US08/510,201 patent/US5608701A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995017750A1 (en) | 1995-06-29 |
| EP0736212A1 (en) | 1996-10-09 |
| EP0736212A4 (en) | 1996-12-27 |
| US5467327A (en) | 1995-11-14 |
| AU1517095A (en) | 1995-07-10 |
| JPH09507111A (en) | 1997-07-15 |
| US5608701A (en) | 1997-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |