CA2405266A1 - System for providing scrambled content, and system for descrambling scrambled content - Google Patents
System for providing scrambled content, and system for descrambling scrambled content Download PDFInfo
- Publication number
- CA2405266A1 CA2405266A1 CA002405266A CA2405266A CA2405266A1 CA 2405266 A1 CA2405266 A1 CA 2405266A1 CA 002405266 A CA002405266 A CA 002405266A CA 2405266 A CA2405266 A CA 2405266A CA 2405266 A1 CA2405266 A1 CA 2405266A1
- Authority
- CA
- Canada
- Prior art keywords
- control word
- ecm
- scrambled content
- control
- word
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
- H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
Abstract
A system for providing scrambled content, comprising a control word generato r, each control word including a control word identifier, a scrambler for providing a stream of scrambled data packets, and an encryption device for providing entitlement control messages (ECM's). One or more consecutive packets are scrambled using the same control word (CW). Each packet includes a control word identifier. An ECM decryption device delivers control words to the descrambler and the descrambler descrambles the data packets of the scrambled content using a control word having a control word identifier corresponding with the control word identifier of the data packet to be descrambled. The system further comprises a storage device for storing scrambled content and means to control play back of the stored content, goin g fast forward and going backwards.
Claims (5)
1. System for providing scrambled content, comprising a control word generator, each control word including a control word identifier, a scrambler for providing a stream of scram-bled data packets, wherein one or more consecutive packets are scrambled using the same control word (CW) and wherein each packet includes a control word identifier identifying the con-trol word used, and an encryption device for providing entitle-ment control messages (ECM's), each ECM including at least a next control word (CW N), characterized in that the ECM encryp-tion device provides ECM's including a previous control word (CW p), a current control word (CW c) and a next control word (CW N).
2. System according to claim 1, wherein the ECM en-cryption device is accommodated in a smart card.
3. System for descrambling scrambled content, compris-ing a descrambler for descrambling the scrambled content, a de-cryption device for decrypting ECM's to obtain control words, wherein the ECM decryption device delivers control words to the descrambler, wherein the descrambler descrambles the data pack-ets of the scrambled content using a control word having a con-trol word identifier corresponding with the control word iden-tifier of the data packet to be descrambled, the system further comprising a storage device for storing scrambled content and a processing unit with means to control play back of the stored content, going fast forward and going backwards, wherein the processing unit is programmed to extract ECM's and to provide the ECM's to the ECM decryption device for decryption, charac-terized in that the processing unit is programmed to request the ECM decryption device to provide at least a next control word (CW N) at play back or going fast forward, and to provide at least a previous control word (CW p) and a current control word (CW c) at going backwards.
4. System according to claim 3, wherein the processing unit is programmed to request the ECM decryption device to pro-vide the current control word (CW c) together with a next con-trol word (CW N) at playback or going fast forward and to pro-vide the current control word (CW c) together with a previous control word (CW p) at going backwards.
5. System according to claim 3 or 4, wherein the ECM
decryption device is accommodated in a smart card.
decryption device is accommodated in a smart card.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00201277.1 | 2000-04-07 | ||
EP00201277A EP1143722B1 (en) | 2000-04-07 | 2000-04-07 | Data scrambling and descrambling system |
PCT/EP2001/003186 WO2001078387A2 (en) | 2000-04-07 | 2001-03-21 | Data scrambling and descrambling system |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2405266A1 true CA2405266A1 (en) | 2001-10-18 |
CA2405266C CA2405266C (en) | 2010-05-25 |
Family
ID=8171322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2405266A Expired - Fee Related CA2405266C (en) | 2000-04-07 | 2001-03-21 | System for providing scrambled content, and system for descrambling scrambled content |
Country Status (14)
Country | Link |
---|---|
US (1) | US7116892B2 (en) |
EP (1) | EP1143722B1 (en) |
JP (1) | JP4772252B2 (en) |
CN (1) | CN1190077C (en) |
AU (1) | AU2001260138B2 (en) |
BR (1) | BR0109835A (en) |
CA (1) | CA2405266C (en) |
DE (1) | DE60040724D1 (en) |
ES (1) | ES2315219T3 (en) |
HK (1) | HK1041143B (en) |
MX (1) | MXPA02009818A (en) |
TW (1) | TW540240B (en) |
WO (1) | WO2001078387A2 (en) |
ZA (1) | ZA200209032B (en) |
Families Citing this family (50)
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US7200859B1 (en) | 2000-11-22 | 2007-04-03 | Digeo, Inc. | Apparatus and method for intelligent multimedia compression and distribution |
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US20020116705A1 (en) * | 2001-02-20 | 2002-08-22 | Perlman Stephen G. | System and method for processing conditional access data |
US7046805B2 (en) | 2001-03-20 | 2006-05-16 | Digeo, Inc. | System and method for efficiently storing and processing multimedia content |
US9100457B2 (en) | 2001-03-28 | 2015-08-04 | Qualcomm Incorporated | Method and apparatus for transmission framing in a wireless communication system |
US8121296B2 (en) | 2001-03-28 | 2012-02-21 | Qualcomm Incorporated | Method and apparatus for security in a data processing system |
US8077679B2 (en) | 2001-03-28 | 2011-12-13 | Qualcomm Incorporated | Method and apparatus for providing protocol options in a wireless communication system |
US7386129B2 (en) | 2001-05-30 | 2008-06-10 | Digeo, Inc. | System and method for multimedia content simulcast |
US7093277B2 (en) | 2001-05-30 | 2006-08-15 | Digeo, Inc. | System and method for improved multi-stream multimedia transmission and processing |
US7352868B2 (en) | 2001-10-09 | 2008-04-01 | Philip Hawkes | Method and apparatus for security in a data processing system |
US7649829B2 (en) * | 2001-10-12 | 2010-01-19 | Qualcomm Incorporated | Method and system for reduction of decoding complexity in a communication system |
CA2434863C (en) * | 2001-12-19 | 2013-04-02 | Irdeto Access B.V. | Digital content distribution system |
US20050084106A1 (en) * | 2002-01-14 | 2005-04-21 | Jilles Venema | System for providing time dependent conditional access |
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EP1516485A1 (en) * | 2002-06-12 | 2005-03-23 | Koninklijke Philips Electronics N.V. | Trick play of an encrypted video stream |
JP4406815B2 (en) | 2002-06-26 | 2010-02-03 | ソニー株式会社 | Information processing apparatus and method, recording medium, and program |
US20040151315A1 (en) * | 2002-11-06 | 2004-08-05 | Kim Hee Jean | Streaming media security system and method |
JP2006511151A (en) * | 2002-12-20 | 2006-03-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Stream processing apparatus and method |
US7599655B2 (en) | 2003-01-02 | 2009-10-06 | Qualcomm Incorporated | Method and apparatus for broadcast services in a communication system |
KR101020523B1 (en) | 2003-02-10 | 2011-03-09 | 아이피지 일렉트로닉스 503 리미티드 | Generation of encrypted video information |
US8098818B2 (en) | 2003-07-07 | 2012-01-17 | Qualcomm Incorporated | Secure registration for a multicast-broadcast-multimedia system (MBMS) |
US8718279B2 (en) | 2003-07-08 | 2014-05-06 | Qualcomm Incorporated | Apparatus and method for a secure broadcast system |
US8724803B2 (en) | 2003-09-02 | 2014-05-13 | Qualcomm Incorporated | Method and apparatus for providing authenticated challenges for broadcast-multicast communications in a communication system |
US7647641B2 (en) * | 2003-12-23 | 2010-01-12 | Viacess | Method and system for conditional access applied to protection of content |
TW200603629A (en) * | 2004-04-22 | 2006-01-16 | Nagravision Sa | Method for processing contents intended for diffusion |
CN1722659B (en) * | 2004-07-13 | 2011-02-23 | 耶德托存取公司 | Method and system for processing multiplex data and method and system for decoding multiplex data flow |
US8359332B1 (en) | 2004-08-02 | 2013-01-22 | Nvidia Corporation | Secure content enabled drive digital rights management system and method |
US8402283B1 (en) | 2004-08-02 | 2013-03-19 | Nvidia Corporation | Secure content enabled drive system and method |
US8875309B1 (en) | 2004-12-15 | 2014-10-28 | Nvidia Corporation | Content server and method of providing content therefrom |
US8751825B1 (en) * | 2004-12-15 | 2014-06-10 | Nvidia Corporation | Content server and method of storing content |
US8788425B1 (en) | 2004-12-15 | 2014-07-22 | Nvidia Corporation | Method and system for accessing content on demand |
US8346807B1 (en) | 2004-12-15 | 2013-01-01 | Nvidia Corporation | Method and system for registering and activating content |
US8893299B1 (en) | 2005-04-22 | 2014-11-18 | Nvidia Corporation | Content keys for authorizing access to content |
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US20080270311A1 (en) * | 2007-04-27 | 2008-10-30 | General Instrument Corporation | Method and Apparatus for Composing a Digital Rights Management License Format |
US8590028B2 (en) | 2007-07-09 | 2013-11-19 | Infosys Limited | Content licensing and conditional access using a mobile device |
US8068608B2 (en) * | 2007-12-17 | 2011-11-29 | Broadcom Corporation | Video processing system for scrambling video streams with dependent portions and methods for use therewith |
CN101516022B (en) * | 2008-02-21 | 2010-12-08 | 上海明波通信技术有限公司 | Method for decoding encrypted information channel in transport stream mode |
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KR101133256B1 (en) * | 2009-02-27 | 2012-04-09 | 한국과학기술원 | Apparatus and method for processing timestamp using signature information in physical layer |
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JP4838422B2 (en) * | 1999-01-28 | 2011-12-14 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Transmission system |
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-
2000
- 2000-04-07 ES ES00201277T patent/ES2315219T3/en not_active Expired - Lifetime
- 2000-04-07 EP EP00201277A patent/EP1143722B1/en not_active Expired - Lifetime
- 2000-04-07 DE DE60040724T patent/DE60040724D1/en not_active Expired - Lifetime
-
2001
- 2001-03-21 US US10/257,219 patent/US7116892B2/en not_active Expired - Fee Related
- 2001-03-21 CN CNB018061141A patent/CN1190077C/en not_active Expired - Fee Related
- 2001-03-21 JP JP2001575712A patent/JP4772252B2/en not_active Expired - Fee Related
- 2001-03-21 AU AU2001260138A patent/AU2001260138B2/en not_active Ceased
- 2001-03-21 CA CA2405266A patent/CA2405266C/en not_active Expired - Fee Related
- 2001-03-21 MX MXPA02009818A patent/MXPA02009818A/en active IP Right Grant
- 2001-03-21 WO PCT/EP2001/003186 patent/WO2001078387A2/en active IP Right Grant
- 2001-03-21 BR BR0109835-7A patent/BR0109835A/en not_active IP Right Cessation
- 2001-04-02 TW TW090107828A patent/TW540240B/en not_active IP Right Cessation
-
2002
- 2002-04-09 HK HK02102620.2A patent/HK1041143B/en not_active IP Right Cessation
- 2002-11-06 ZA ZA200209032A patent/ZA200209032B/en unknown
Also Published As
Publication number | Publication date |
---|---|
AU2001260138B2 (en) | 2003-12-18 |
MXPA02009818A (en) | 2003-03-27 |
BR0109835A (en) | 2003-06-24 |
HK1041143A1 (en) | 2002-06-28 |
CN1421097A (en) | 2003-05-28 |
EP1143722A1 (en) | 2001-10-10 |
CN1190077C (en) | 2005-02-16 |
CA2405266C (en) | 2010-05-25 |
WO2001078387A3 (en) | 2002-10-24 |
TW540240B (en) | 2003-07-01 |
DE60040724D1 (en) | 2008-12-18 |
EP1143722B1 (en) | 2008-11-05 |
WO2001078387A2 (en) | 2001-10-18 |
US7116892B2 (en) | 2006-10-03 |
AU6013801A (en) | 2001-10-23 |
ZA200209032B (en) | 2003-08-28 |
JP2003530785A (en) | 2003-10-14 |
HK1041143B (en) | 2009-05-08 |
US20030152364A1 (en) | 2003-08-14 |
ES2315219T3 (en) | 2009-04-01 |
JP4772252B2 (en) | 2011-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20150323 |
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MKLA | Lapsed |
Effective date: 20150323 |