CA2185790A1 - Apparatus and methods for including codes in audio signals and decoding - Google Patents
Apparatus and methods for including codes in audio signals and decodingInfo
- Publication number
- CA2185790A1 CA2185790A1 CA002185790A CA2185790A CA2185790A1 CA 2185790 A1 CA2185790 A1 CA 2185790A1 CA 002185790 A CA002185790 A CA 002185790A CA 2185790 A CA2185790 A CA 2185790A CA 2185790 A1 CA2185790 A1 CA 2185790A1
- Authority
- CA
- Canada
- Prior art keywords
- code
- methods
- audio signal
- frequency component
- decoding
- 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
- 230000005236 sound signal Effects 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 3
- 238000011156 evaluation Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
- H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
- H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
- H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
- H04H60/40—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast time
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
- H04H60/38—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space
- H04H60/41—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
- H04H60/44—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas for identifying broadcast stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
- H04H60/45—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying users
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/56—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
- H04H60/58—Arrangements characterised by components specially adapted for monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 of audio
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/12—Arrangements for observation, testing or troubleshooting
- H04H20/14—Arrangements for observation, testing or troubleshooting for monitoring programmes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/13—Arrangements for device control affected by the broadcast information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/17—Arrangements for conditional access to broadcast information or to broadcast-related services on recording information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/61—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
- H04H60/63—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 for services of sales
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/61—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
- H04H60/66—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 for using the result on distributors' side
Abstract
Apparatus and methods for including a code (68) having at least one code frequency component in an audio signal (60) are provided.
The abilities of various frequency components in the audio signal to mask the code frequency component to human hearing are evaluated (64), and based on these evaluations an amplitude (76) is assigned to the code frequency component. Methods and apparatus for detecting a code in an encoded audio signal are also provided. A code frequency component in the encoded audio signal is detected based on an expected code amplitude or on a noise amplitude within a range of audio frequencies including the frequency of the code component.
The abilities of various frequency components in the audio signal to mask the code frequency component to human hearing are evaluated (64), and based on these evaluations an amplitude (76) is assigned to the code frequency component. Methods and apparatus for detecting a code in an encoded audio signal are also provided. A code frequency component in the encoded audio signal is detected based on an expected code amplitude or on a noise amplitude within a range of audio frequencies including the frequency of the code component.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/221,019 | 1994-03-31 | ||
US08/221,019 US5450490A (en) | 1994-03-31 | 1994-03-31 | Apparatus and methods for including codes in audio signals and decoding |
US08/408,010 | 1995-03-24 | ||
US08/408,010 US5764763A (en) | 1994-03-31 | 1995-03-24 | Apparatus and methods for including codes in audio signals and decoding |
PCT/US1995/003797 WO1995027349A1 (en) | 1994-03-31 | 1995-03-27 | Apparatus and methods for including codes in audio signals and decoding |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2185790A1 true CA2185790A1 (en) | 1995-10-12 |
CA2185790C CA2185790C (en) | 2008-03-11 |
Family
ID=26915413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002185790A Expired - Lifetime CA2185790C (en) | 1994-03-31 | 1995-03-27 | Apparatus and methods for including codes in audio signals and decoding |
Country Status (23)
Country | Link |
---|---|
US (3) | US6421445B1 (en) |
EP (1) | EP0753226B1 (en) |
JP (2) | JPH10500263A (en) |
CN (1) | CN1149366A (en) |
AT (1) | AT410047B (en) |
AU (1) | AU709873B2 (en) |
BR (1) | BR9507230A (en) |
CA (1) | CA2185790C (en) |
CH (1) | CH694652A5 (en) |
CZ (1) | CZ288497B6 (en) |
DE (1) | DE19581594T1 (en) |
DK (1) | DK176762B1 (en) |
FI (1) | FI115938B (en) |
GB (1) | GB2302000B (en) |
HU (7) | HU219667B (en) |
IL (1) | IL113190A (en) |
LU (1) | LU88820A1 (en) |
MX (1) | MX9604464A (en) |
NO (1) | NO322242B1 (en) |
NZ (2) | NZ331166A (en) |
PL (5) | PL177808B1 (en) |
SE (1) | SE519882C2 (en) |
WO (1) | WO1995027349A1 (en) |
Families Citing this family (172)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5812937B1 (en) * | 1993-04-08 | 2000-09-19 | Digital Dj Inc | Broadcast data system with multiple-tuner receiver |
PL177808B1 (en) | 1994-03-31 | 2000-01-31 | Arbitron Co | Apparatus for and methods of including codes into audio signals and decoding such codes |
GB9604659D0 (en) * | 1996-03-05 | 1996-05-01 | Central Research Lab Ltd | Audio signal identification |
AU2205297A (en) * | 1996-03-13 | 1997-10-01 | Digital D.J. Incorporated | Subcarrier injection system and method using adaptive level-shifted minimum shift keying |
JP3470864B2 (en) * | 1996-07-31 | 2003-11-25 | 日本ビクター株式会社 | Copyright information embedding device and recording medium |
JP3503434B2 (en) * | 1996-07-31 | 2004-03-08 | 日本ビクター株式会社 | Copyright information embedding device and recording medium |
US7607147B1 (en) | 1996-12-11 | 2009-10-20 | The Nielsen Company (Us), Llc | Interactive service device metering systems |
US6169789B1 (en) | 1996-12-16 | 2001-01-02 | Sanjay K. Rao | Intelligent keyboard system |
US8183998B2 (en) | 1996-12-16 | 2012-05-22 | Ip Holdings, Inc. | System for seamless and secure networking of implantable medical devices, electronic patch devices and wearable devices |
US6675383B1 (en) * | 1997-01-22 | 2004-01-06 | Nielsen Media Research, Inc. | Source detection apparatus and method for audience measurement |
AU5496498A (en) * | 1998-01-16 | 1999-08-02 | Kabusiki Kaisha Intellectual Cyber | Recording method for specifying master recording medium and method for specifying master recording medium |
BR9810699A (en) | 1998-05-12 | 2000-09-05 | Nielsen Media Res Inc | Television audience measurement system, process and device to identify a television program selected by a viewer, and software agent stored in memory in association with digital television equipment |
US7006555B1 (en) | 1998-07-16 | 2006-02-28 | Nielsen Media Research, Inc. | Spectral audio encoding |
US6272176B1 (en) * | 1998-07-16 | 2001-08-07 | Nielsen Media Research, Inc. | Broadcast encoding system and method |
US7515896B1 (en) | 1998-10-21 | 2009-04-07 | Parkervision, Inc. | Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships |
US6061551A (en) | 1998-10-21 | 2000-05-09 | Parkervision, Inc. | Method and system for down-converting electromagnetic signals |
US7379901B1 (en) | 1998-09-11 | 2008-05-27 | Lv Partners, L.P. | Accessing a vendor web site using personal account information retrieved from a credit card company web site |
US6868433B1 (en) | 1998-09-11 | 2005-03-15 | L.V. Partners, L.P. | Input device having positional and scanning capabilities |
US6704864B1 (en) | 1999-08-19 | 2004-03-09 | L.V. Partners, L.P. | Automatic configuration of equipment software |
US7386600B1 (en) | 1998-09-11 | 2008-06-10 | Lv Partners, L.P. | Launching a web site using a personal device |
US7191247B1 (en) | 1998-09-11 | 2007-03-13 | Lv Partners, Lp | Method for connecting a wireless device to a remote location on a network |
US6636896B1 (en) | 1998-09-11 | 2003-10-21 | Lv Partners, L.P. | Method and apparatus for utilizing an audibly coded signal to conduct commerce over the internet |
US6823388B1 (en) | 1998-09-11 | 2004-11-23 | L.V. Parners, L.P. | Method and apparatus for accessing a remote location with an optical reader having a programmable memory system |
US7392312B1 (en) * | 1998-09-11 | 2008-06-24 | Lv Partners, L.P. | Method for utilizing visual cue in conjunction with web access |
US6745234B1 (en) | 1998-09-11 | 2004-06-01 | Digital:Convergence Corporation | Method and apparatus for accessing a remote location by scanning an optical code |
US7440993B1 (en) | 1998-09-11 | 2008-10-21 | Lv Partners, L.P. | Method and apparatus for launching a web browser in response to scanning of product information |
US7392945B1 (en) | 1998-09-11 | 2008-07-01 | Lv Partners, L.P. | Portable scanner for enabling automatic commerce transactions |
US7236754B2 (en) | 1999-08-23 | 2007-06-26 | Parkervision, Inc. | Method and system for frequency up-conversion |
US6370371B1 (en) | 1998-10-21 | 2002-04-09 | Parkervision, Inc. | Applications of universal frequency translation |
US6813485B2 (en) * | 1998-10-21 | 2004-11-02 | Parkervision, Inc. | Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same |
US7039372B1 (en) | 1998-10-21 | 2006-05-02 | Parkervision, Inc. | Method and system for frequency up-conversion with modulation embodiments |
US7209725B1 (en) * | 1999-01-22 | 2007-04-24 | Parkervision, Inc | Analog zero if FM decoder and embodiments thereof, such as the family radio service |
US6879817B1 (en) | 1999-04-16 | 2005-04-12 | Parkervision, Inc. | DC offset, re-radiation, and I/Q solutions using universal frequency translation technology |
US6853690B1 (en) | 1999-04-16 | 2005-02-08 | Parkervision, Inc. | Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments |
US7065162B1 (en) | 1999-04-16 | 2006-06-20 | Parkervision, Inc. | Method and system for down-converting an electromagnetic signal, and transforms for same |
US7110444B1 (en) | 1999-08-04 | 2006-09-19 | Parkervision, Inc. | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations |
US7693230B2 (en) | 1999-04-16 | 2010-04-06 | Parkervision, Inc. | Apparatus and method of differential IQ frequency up-conversion |
US6871180B1 (en) * | 1999-05-25 | 2005-03-22 | Arbitron Inc. | Decoding of information in audio signals |
US10728381B2 (en) * | 1999-06-04 | 2020-07-28 | Raman K. Rao | Reconfigurable mobile device interfaces supporting authenticated high quality video, audio, TV and multimedia services |
JP4522509B2 (en) * | 1999-07-07 | 2010-08-11 | アルパイン株式会社 | Audio equipment |
US8295406B1 (en) | 1999-08-04 | 2012-10-23 | Parkervision, Inc. | Universal platform module for a plurality of communication protocols |
CA2809775C (en) | 1999-10-27 | 2017-03-21 | The Nielsen Company (Us), Llc | Audio signature extraction and correlation |
US6947893B1 (en) * | 1999-11-19 | 2005-09-20 | Nippon Telegraph & Telephone Corporation | Acoustic signal transmission with insertion signal for machine control |
GB2358999A (en) * | 2000-02-02 | 2001-08-08 | Central Research Lab Ltd | A system and method for labelling a signal |
JP2001275115A (en) * | 2000-03-23 | 2001-10-05 | Nec Corp | Electronic watermark data insertion device and detector |
US6968564B1 (en) * | 2000-04-06 | 2005-11-22 | Nielsen Media Research, Inc. | Multi-band spectral audio encoding |
US7010286B2 (en) | 2000-04-14 | 2006-03-07 | Parkervision, Inc. | Apparatus, system, and method for down-converting and up-converting electromagnetic signals |
US7466742B1 (en) * | 2000-04-21 | 2008-12-16 | Nielsen Media Research, Inc. | Detection of entropy in connection with audio signals |
US6879652B1 (en) * | 2000-07-14 | 2005-04-12 | Nielsen Media Research, Inc. | Method for encoding an input signal |
FR2815507B1 (en) * | 2000-10-16 | 2003-01-31 | Cit Alcatel | METHOD FOR MANAGING RADIO RESOURCES IN AN INTERACTIVE TELECOMMUNICATION NETWORK |
US7454453B2 (en) | 2000-11-14 | 2008-11-18 | Parkervision, Inc. | Methods, systems, and computer program products for parallel correlation and applications thereof |
US7010559B2 (en) * | 2000-11-14 | 2006-03-07 | Parkervision, Inc. | Method and apparatus for a parallel correlator and applications thereof |
US20020080976A1 (en) * | 2000-12-14 | 2002-06-27 | Schreer Scott P. | System and method for accessing authorized recordings |
US7072908B2 (en) * | 2001-03-26 | 2006-07-04 | Microsoft Corporation | Methods and systems for synchronizing visualizations with audio streams |
US6807528B1 (en) * | 2001-05-08 | 2004-10-19 | Dolby Laboratories Licensing Corporation | Adding data to a compressed data frame |
DE10129239C1 (en) | 2001-06-18 | 2002-10-31 | Fraunhofer Ges Forschung | Audio signal water-marking method processes water-mark signal before embedding in audio signal so that it is not audibly perceived |
US8572640B2 (en) * | 2001-06-29 | 2013-10-29 | Arbitron Inc. | Media data use measurement with remote decoding/pattern matching |
US7100181B2 (en) * | 2001-08-22 | 2006-08-29 | Nielsen Media Research, Inc. | Television proximity sensor |
US7072427B2 (en) | 2001-11-09 | 2006-07-04 | Parkervision, Inc. | Method and apparatus for reducing DC offsets in a communication system |
US7085335B2 (en) * | 2001-11-09 | 2006-08-01 | Parkervision, Inc. | Method and apparatus for reducing DC offsets in a communication system |
JP4166466B2 (en) * | 2001-12-19 | 2008-10-15 | ソニー株式会社 | Wireless communication system and wireless communication method, wireless communication apparatus and control method thereof, and computer program |
US20030131350A1 (en) * | 2002-01-08 | 2003-07-10 | Peiffer John C. | Method and apparatus for identifying a digital audio signal |
US7076558B1 (en) | 2002-02-27 | 2006-07-11 | Microsoft Corporation | User-centric consent management system and method |
US7321640B2 (en) * | 2002-06-07 | 2008-01-22 | Parkervision, Inc. | Active polyphase inverter filter for quadrature signal generation |
US7379883B2 (en) | 2002-07-18 | 2008-05-27 | Parkervision, Inc. | Networking methods and systems |
US7460584B2 (en) | 2002-07-18 | 2008-12-02 | Parkervision, Inc. | Networking methods and systems |
US7143028B2 (en) * | 2002-07-24 | 2006-11-28 | Applied Minds, Inc. | Method and system for masking speech |
US7460827B2 (en) * | 2002-07-26 | 2008-12-02 | Arbitron, Inc. | Radio frequency proximity detection and identification system and method |
US7239981B2 (en) | 2002-07-26 | 2007-07-03 | Arbitron Inc. | Systems and methods for gathering audience measurement data |
US9711153B2 (en) | 2002-09-27 | 2017-07-18 | The Nielsen Company (Us), Llc | Activating functions in processing devices using encoded audio and detecting audio signatures |
US8959016B2 (en) | 2002-09-27 | 2015-02-17 | The Nielsen Company (Us), Llc | Activating functions in processing devices using start codes embedded in audio |
AU2003269555A1 (en) * | 2002-10-16 | 2004-05-04 | Mazetech Co., Ltd. | Encryption processing method and device of a voice signal |
WO2004038538A2 (en) | 2002-10-23 | 2004-05-06 | Nielsen Media Research, Inc. | Digital data insertion apparatus and methods for use with compressed audio/video data |
US6845360B2 (en) * | 2002-11-22 | 2005-01-18 | Arbitron Inc. | Encoding multiple messages in audio data and detecting same |
CN1745374A (en) | 2002-12-27 | 2006-03-08 | 尼尔逊媒介研究股份有限公司 | Methods and apparatus for transcoding metadata |
US7042967B2 (en) * | 2003-03-03 | 2006-05-09 | Interdigital Technology Corporation | Reduced complexity sliding window based equalizer |
CN101521639A (en) * | 2003-03-03 | 2009-09-02 | 美商内数位科技公司 | Reduced complexity sliding window based equalizer |
JP2004297141A (en) * | 2003-03-25 | 2004-10-21 | Nippon Hoso Kyokai <Nhk> | View history acquisition system in data broadcast, transmitter, and receiver |
KR100948381B1 (en) * | 2003-05-15 | 2010-03-22 | 삼성전자주식회사 | Image Watermarking Method Using Human Visual System |
US7460684B2 (en) | 2003-06-13 | 2008-12-02 | Nielsen Media Research, Inc. | Method and apparatus for embedding watermarks |
CA2530012C (en) | 2003-06-20 | 2012-04-03 | Nielsen Media Research, Inc. | Signature-based program identification apparatus and methods for use with digital broadcast systems |
WO2005032144A1 (en) * | 2003-08-29 | 2005-04-07 | Nielsen Media Research, Inc. | Methods and apparatus to measure media consumption |
US7474739B2 (en) * | 2003-12-15 | 2009-01-06 | International Business Machines Corporation | Providing speaker identifying information within embedded digital information |
US8447668B2 (en) * | 2004-01-16 | 2013-05-21 | Keith Jentoft | Audio-equipped transaction card systems and approaches |
TWI404419B (en) * | 2004-04-07 | 2013-08-01 | Nielsen Media Res Inc | Data insertion methods , sysytems, machine readable media and apparatus for use with compressed audio/video data |
CN102592638A (en) | 2004-07-02 | 2012-07-18 | 尼尔逊媒介研究股份有限公司 | Method and apparatus for mixing compressed digital bit streams |
WO2006023770A2 (en) * | 2004-08-18 | 2006-03-02 | Nielsen Media Research, Inc. | Methods and apparatus for generating signatures |
US7672356B2 (en) * | 2005-05-19 | 2010-03-02 | Itt Manufacturing Enterprises, Inc. | Method and apparatus for detection of a frequency coded sequence in the presence of sinusoidal interference |
EP1739670A1 (en) * | 2005-06-29 | 2007-01-03 | Sony DADC Austria AG | Optical data carrier |
MX2008002317A (en) | 2005-08-16 | 2008-03-24 | Nielsen Media Res Inc | Display device on/off detection methods and apparatus. |
KR101541048B1 (en) * | 2005-09-26 | 2015-08-03 | 닐슨 미디어 리서치 인코퍼레이티드 | Methods and apparatus for metering computer-based media presentation |
US9015740B2 (en) | 2005-12-12 | 2015-04-21 | The Nielsen Company (Us), Llc | Systems and methods to wirelessly meter audio/visual devices |
JP4728860B2 (en) * | 2006-03-29 | 2011-07-20 | 株式会社東芝 | Information retrieval device |
US8151291B2 (en) | 2006-06-15 | 2012-04-03 | The Nielsen Company (Us), Llc | Methods and apparatus to meter content exposure using closed caption information |
EP2095560B1 (en) | 2006-10-11 | 2015-09-09 | The Nielsen Company (US), LLC | Methods and apparatus for embedding codes in compressed audio data streams |
US10885543B1 (en) | 2006-12-29 | 2021-01-05 | The Nielsen Company (Us), Llc | Systems and methods to pre-scale media content to facilitate audience measurement |
WO2008103738A2 (en) | 2007-02-20 | 2008-08-28 | Nielsen Media Research, Inc. | Methods and apparatus for characterizing media |
US8458737B2 (en) * | 2007-05-02 | 2013-06-04 | The Nielsen Company (Us), Llc | Methods and apparatus for generating signatures |
US8213521B2 (en) | 2007-08-15 | 2012-07-03 | The Nielsen Company (Us), Llc | Methods and apparatus for audience measurement using global signature representation and matching |
US20090074094A1 (en) * | 2007-09-14 | 2009-03-19 | Qualcomm Incorporated | Beacon symbols with multiple active subcarriers for wireless communication |
EP2210252B1 (en) | 2007-11-12 | 2017-05-24 | The Nielsen Company (US), LLC | Methods and apparatus to perform audio watermarking and watermark detection and extraction |
AU2012241085B2 (en) * | 2007-11-12 | 2014-10-23 | The Nielsen Company (Us), Llc | Methods and apparatus to perform audio watermarking and watermark detection and extraction |
US8457951B2 (en) | 2008-01-29 | 2013-06-04 | The Nielsen Company (Us), Llc | Methods and apparatus for performing variable black length watermarking of media |
US8600531B2 (en) | 2008-03-05 | 2013-12-03 | The Nielsen Company (Us), Llc | Methods and apparatus for generating signatures |
US9667365B2 (en) * | 2008-10-24 | 2017-05-30 | The Nielsen Company (Us), Llc | Methods and apparatus to perform audio watermarking and watermark detection and extraction |
AU2013203838B2 (en) * | 2008-10-24 | 2016-09-08 | The Nielsen Company (Us), Llc | Methods and apparatus to perform audio watermarking and watermark detection and extraction |
US8121830B2 (en) * | 2008-10-24 | 2012-02-21 | The Nielsen Company (Us), Llc | Methods and apparatus to extract data encoded in media content |
US8359205B2 (en) | 2008-10-24 | 2013-01-22 | The Nielsen Company (Us), Llc | Methods and apparatus to perform audio watermarking and watermark detection and extraction |
AU2013203820B2 (en) * | 2008-10-24 | 2016-08-04 | The Nielsen Company (Us), Llc | Methods and Apparatus to Extract Data Encoded in Media |
US9124769B2 (en) | 2008-10-31 | 2015-09-01 | The Nielsen Company (Us), Llc | Methods and apparatus to verify presentation of media content |
US8508357B2 (en) | 2008-11-26 | 2013-08-13 | The Nielsen Company (Us), Llc | Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking |
CN101420564A (en) * | 2008-12-02 | 2009-04-29 | 北京中星微电子有限公司 | Audio system identifying circuit and terminal |
US20100184479A1 (en) * | 2009-01-20 | 2010-07-22 | Griffin Jr Paul P | System and Apparatus for Communicating Digital Data through Audio Input/Output Ports |
US10008212B2 (en) * | 2009-04-17 | 2018-06-26 | The Nielsen Company (Us), Llc | System and method for utilizing audio encoding for measuring media exposure with environmental masking |
US20100268573A1 (en) * | 2009-04-17 | 2010-10-21 | Anand Jain | System and method for utilizing supplemental audio beaconing in audience measurement |
US20100268540A1 (en) * | 2009-04-17 | 2010-10-21 | Taymoor Arshi | System and method for utilizing audio beaconing in audience measurement |
CN104683827A (en) | 2009-05-01 | 2015-06-03 | 尼尔森(美国)有限公司 | Methods and apparatus to provide secondary content in association with primary broadcast media content |
US20130102241A1 (en) * | 2009-09-11 | 2013-04-25 | Lazer Spots, Llc | Targeted content insertion for devices receiving radio broadcast content |
US20130232198A1 (en) * | 2009-12-21 | 2013-09-05 | Arbitron Inc. | System and Method for Peer-to-Peer Distribution of Media Exposure Data |
US20110153391A1 (en) * | 2009-12-21 | 2011-06-23 | Michael Tenbrock | Peer-to-peer privacy panel for audience measurement |
EP2362384A1 (en) * | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark generator, watermark decoder, method for providing a watermark signal, method for providing binary message data in dependence on a watermarked signal and a computer program using improved synchronization concept |
EP2362386A1 (en) | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark generator, watermark decoder, method for providing a watermark signal in dependence on binary message data, method for providing binary message data in dependence on a watermarked signal and computer program using a two-dimensional bit spreading |
EP2362383A1 (en) | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark decoder and method for providing binary message data |
EP2362387A1 (en) | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark generator, watermark decoder, method for providing a watermark signal in dependence on binary message data, method for providing binary message data in dependence on a watermarked signal and computer program using a differential encoding |
EP2362385A1 (en) | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark signal provision and watermark embedding |
EP2362382A1 (en) | 2010-02-26 | 2011-08-31 | Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. | Watermark signal provider and method for providing a watermark signal |
US8713593B2 (en) * | 2010-03-01 | 2014-04-29 | Zazum, Inc. | Detection system and method for mobile device application |
US8855101B2 (en) * | 2010-03-09 | 2014-10-07 | The Nielsen Company (Us), Llc | Methods, systems, and apparatus to synchronize actions of audio source monitors |
US8768713B2 (en) * | 2010-03-15 | 2014-07-01 | The Nielsen Company (Us), Llc | Set-top-box with integrated encoder/decoder for audience measurement |
US9134875B2 (en) | 2010-03-23 | 2015-09-15 | VoteBlast, Inc. | Enhancing public opinion gathering and dissemination |
US8732605B1 (en) | 2010-03-23 | 2014-05-20 | VoteBlast, Inc. | Various methods and apparatuses for enhancing public opinion gathering and dissemination |
JP5573298B2 (en) * | 2010-03-31 | 2014-08-20 | ヤマハ株式会社 | Sound emission device |
US8676570B2 (en) | 2010-04-26 | 2014-03-18 | The Nielsen Company (Us), Llc | Methods, apparatus and articles of manufacture to perform audio watermark decoding |
US8619985B2 (en) * | 2010-04-27 | 2013-12-31 | Research In Motion Limited | Table splitting for cryptographic processes |
JP5857418B2 (en) * | 2011-03-02 | 2016-02-10 | 大日本印刷株式会社 | Method and apparatus for creating auditory masking data |
GB201105992D0 (en) * | 2011-04-08 | 2011-05-18 | Univ Surrey | Source detection by spectrum sensing |
US9380356B2 (en) | 2011-04-12 | 2016-06-28 | The Nielsen Company (Us), Llc | Methods and apparatus to generate a tag for media content |
US9210208B2 (en) | 2011-06-21 | 2015-12-08 | The Nielsen Company (Us), Llc | Monitoring streaming media content |
US9209978B2 (en) | 2012-05-15 | 2015-12-08 | The Nielsen Company (Us), Llc | Methods and apparatus to measure exposure to streaming media |
WO2013096314A1 (en) | 2011-12-19 | 2013-06-27 | The Nielsen Company (Us), Llc | Methods and apparatus for crediting a media presentation device |
US9692535B2 (en) | 2012-02-20 | 2017-06-27 | The Nielsen Company (Us), Llc | Methods and apparatus for automatic TV on/off detection |
US9812137B2 (en) * | 2012-07-25 | 2017-11-07 | Paypal, Inc. | Data communication using audio patterns systems and methods |
US9282366B2 (en) | 2012-08-13 | 2016-03-08 | The Nielsen Company (Us), Llc | Methods and apparatus to communicate audience measurement information |
US10158927B1 (en) | 2012-09-05 | 2018-12-18 | Google Llc | Systems and methods for detecting audio-video synchronization using timestamps |
US9099080B2 (en) | 2013-02-06 | 2015-08-04 | Muzak Llc | System for targeting location-based communications |
US9313544B2 (en) | 2013-02-14 | 2016-04-12 | The Nielsen Company (Us), Llc | Methods and apparatus to measure exposure to streaming media |
US9300645B1 (en) | 2013-03-14 | 2016-03-29 | Ip Holdings, Inc. | Mobile IO input and output for smartphones, tablet, and wireless devices including touch screen, voice, pen, and gestures |
US9711152B2 (en) | 2013-07-31 | 2017-07-18 | The Nielsen Company (Us), Llc | Systems apparatus and methods for encoding/decoding persistent universal media codes to encoded audio |
US20150039321A1 (en) | 2013-07-31 | 2015-02-05 | Arbitron Inc. | Apparatus, System and Method for Reading Codes From Digital Audio on a Processing Device |
US8918326B1 (en) | 2013-12-05 | 2014-12-23 | The Telos Alliance | Feedback and simulation regarding detectability of a watermark message |
US8768714B1 (en) | 2013-12-05 | 2014-07-01 | The Telos Alliance | Monitoring detectability of a watermark message |
US9824694B2 (en) | 2013-12-05 | 2017-11-21 | Tls Corp. | Data carriage in encoded and pre-encoded audio bitstreams |
US8768710B1 (en) | 2013-12-05 | 2014-07-01 | The Telos Alliance | Enhancing a watermark signal extracted from an output signal of a watermarking encoder |
US8768005B1 (en) | 2013-12-05 | 2014-07-01 | The Telos Alliance | Extracting a watermark signal from an output signal of a watermarking encoder |
US9699499B2 (en) | 2014-04-30 | 2017-07-04 | The Nielsen Company (Us), Llc | Methods and apparatus to measure exposure to streaming media |
US9462471B2 (en) * | 2014-06-27 | 2016-10-04 | Mcafee, Inc. | Identification of call participants |
EP3614382B1 (en) * | 2014-07-28 | 2020-10-07 | Nippon Telegraph And Telephone Corporation | Coding of a sound signal |
US9686031B2 (en) | 2014-08-06 | 2017-06-20 | The Nielsen Company (Us), Llc | Methods and apparatus to detect a state of media presentation devices |
JP6882168B2 (en) | 2014-10-15 | 2021-06-02 | エルアイエスエヌアール・インコーポレーテッド | Inaudible signaling tone |
US9804719B2 (en) * | 2014-10-23 | 2017-10-31 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device |
WO2016127333A1 (en) * | 2015-02-11 | 2016-08-18 | Harman International Industries, Incorporated | Mobile device positioning |
US9924224B2 (en) | 2015-04-03 | 2018-03-20 | The Nielsen Company (Us), Llc | Methods and apparatus to determine a state of a media presentation device |
US9130685B1 (en) | 2015-04-14 | 2015-09-08 | Tls Corp. | Optimizing parameters in deployed systems operating in delayed feedback real world environments |
US9762965B2 (en) | 2015-05-29 | 2017-09-12 | The Nielsen Company (Us), Llc | Methods and apparatus to measure exposure to streaming media |
US9454343B1 (en) | 2015-07-20 | 2016-09-27 | Tls Corp. | Creating spectral wells for inserting watermarks in audio signals |
US9626977B2 (en) | 2015-07-24 | 2017-04-18 | Tls Corp. | Inserting watermarks into audio signals that have speech-like properties |
US10115404B2 (en) | 2015-07-24 | 2018-10-30 | Tls Corp. | Redundancy in watermarking audio signals that have speech-like properties |
US10210545B2 (en) * | 2015-12-30 | 2019-02-19 | TCL Research America Inc. | Method and system for grouping devices in a same space for cross-device marketing |
US10460709B2 (en) * | 2017-06-26 | 2019-10-29 | The Intellectual Property Network, Inc. | Enhanced system, method, and devices for utilizing inaudible tones with music |
US10713335B2 (en) * | 2017-08-28 | 2020-07-14 | Visa International Service Association | System, method, and apparatus for detecting unlicensed performances of copyrighted creative works |
CN111091740A (en) * | 2020-01-14 | 2020-05-01 | 中仿智能科技(上海)股份有限公司 | Sound operating system of flight simulator |
US11564003B1 (en) | 2021-09-20 | 2023-01-24 | The Nielsen Company (Us), Llc | Systems, apparatus, and methods to improve watermark detection in acoustic environments |
Family Cites Families (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470240A (en) | 1945-07-31 | 1949-05-17 | Rca Corp | Limiting detector circuits |
US2662168A (en) | 1946-11-09 | 1953-12-08 | Serge A Scherbatskoy | System of determining the listening habits of wave signal receiver users |
US2573279A (en) | 1946-11-09 | 1951-10-30 | Serge A Scherbatskoy | System of determining the listening habits of wave signal receiver users |
US2660662A (en) | 1947-10-24 | 1953-11-24 | Nielsen A C Co | Search signal apparatus for determining the listening habits of wave signal receiver users |
US2660511A (en) | 1947-10-24 | 1953-11-24 | Nielsen A C Co | Lockout and recycling device for an apparatus for determining the listening habits of wave signal receiver users |
US2630525A (en) | 1951-05-25 | 1953-03-03 | Musicast Inc | System for transmitting and receiving coded entertainment programs |
US2766374A (en) | 1951-07-25 | 1956-10-09 | Internat Telementer Corp | System and apparatus for determining popularity ratings of different transmitted programs |
US3004104A (en) | 1954-04-29 | 1961-10-10 | Muzak Corp | Identification of sound and like signals |
NL154378B (en) | 1965-01-08 | 1977-08-15 | Frederik Adolf Nauta En Freder | SYSTEM AND DEVICE FOR RECORDING LISTENING AND / OR VIEWING DATA. |
US3492577A (en) | 1966-10-07 | 1970-01-27 | Intern Telemeter Corp | Audience rating system |
US3845391A (en) * | 1969-07-08 | 1974-10-29 | Audicom Corp | Communication including submerged identification signal |
JPS508907B1 (en) * | 1970-07-08 | 1975-04-08 | ||
JPS5619141B1 (en) | 1970-10-24 | 1981-05-06 | ||
JPS5221852B2 (en) | 1971-10-19 | 1977-06-14 | ||
US4025851A (en) | 1975-11-28 | 1977-05-24 | A.C. Nielsen Company | Automatic monitor for programs broadcast |
DE2757171C3 (en) | 1977-12-22 | 1980-07-10 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Method and arrangement for the transmission of two different pieces of information in a single transmission channel with a given bandwidth on a carrier wave |
US4225967A (en) | 1978-01-09 | 1980-09-30 | Fujitsu Limited | Broadcast acknowledgement method and system |
US4230990C1 (en) * | 1979-03-16 | 2002-04-09 | John G Lert Jr | Broadcast program identification method and system |
US4425642A (en) * | 1982-01-08 | 1984-01-10 | Applied Spectrum Technologies, Inc. | Simultaneous transmission of two information signals within a band-limited communications channel |
JPS58198934A (en) * | 1982-05-17 | 1983-11-19 | Sony Corp | Secret talk device |
US4450531A (en) | 1982-09-10 | 1984-05-22 | Ensco, Inc. | Broadcast signal recognition system and method |
US4639779A (en) | 1983-03-21 | 1987-01-27 | Greenberg Burton L | Method and apparatus for the automatic identification and verification of television broadcast programs |
US4967273A (en) | 1983-03-21 | 1990-10-30 | Vidcode, Inc. | Television program transmission verification method and apparatus |
US4805020A (en) | 1983-03-21 | 1989-02-14 | Greenberg Burton L | Television program transmission verification method and apparatus |
US4547804A (en) | 1983-03-21 | 1985-10-15 | Greenberg Burton L | Method and apparatus for the automatic identification and verification of commercial broadcast programs |
US4703476A (en) | 1983-09-16 | 1987-10-27 | Audicom Corporation | Encoding of transmitted program material |
FR2559002B1 (en) | 1984-01-27 | 1986-09-05 | Gam Steffen | METHOD AND DEVICE FOR DETECTING AUDIOVISUAL INFORMATION BROADCASTED BY A TRANSMITTER |
US4613904A (en) | 1984-03-15 | 1986-09-23 | Control Data Corporation | Television monitoring device |
US4697209A (en) | 1984-04-26 | 1987-09-29 | A. C. Nielsen Company | Methods and apparatus for automatically identifying programs viewed or recorded |
CA1208761A (en) | 1984-06-06 | 1986-07-29 | Cablovision Alma Inc. | Method and device for remotely identifying tv receivers displaying a given channel by means of an identification signal |
DE3506912A1 (en) * | 1985-02-27 | 1986-08-28 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | METHOD FOR TRANSMITTING AN AUDIO SIGNAL |
US4618995A (en) | 1985-04-24 | 1986-10-21 | Kemp Saundra R | Automatic system and method for monitoring and storing radio user listening habits |
US4626904A (en) | 1985-11-12 | 1986-12-02 | Control Data Corporation | Meter for passively logging the presence and identity of TV viewers |
GB8611014D0 (en) * | 1986-05-06 | 1986-06-11 | Emi Plc Thorn | Signal identification |
US4718106A (en) | 1986-05-12 | 1988-01-05 | Weinblatt Lee S | Survey of radio audience |
DE3703143A1 (en) * | 1987-02-03 | 1988-08-11 | Thomson Brandt Gmbh | METHOD FOR TRANSMITTING AN AUDIO SIGNAL |
US4843562A (en) | 1987-06-24 | 1989-06-27 | Broadcast Data Systems Limited Partnership | Broadcast information classification system and method |
US5394274A (en) | 1988-01-22 | 1995-02-28 | Kahn; Leonard R. | Anti-copy system utilizing audible and inaudible protection signals |
DE3806411C2 (en) * | 1988-02-29 | 1996-05-30 | Thomson Brandt Gmbh | Method of transmitting a sound signal and an additional signal |
US4945412A (en) | 1988-06-14 | 1990-07-31 | Kramer Robert A | Method of and system for identification and verification of broadcasting television and radio program segments |
US4955070A (en) | 1988-06-29 | 1990-09-04 | Viewfacts, Inc. | Apparatus and method for automatically monitoring broadcast band listening habits |
US5213337A (en) * | 1988-07-06 | 1993-05-25 | Robert Sherman | System for communication using a broadcast audio signal |
US5023929A (en) | 1988-09-15 | 1991-06-11 | Npd Research, Inc. | Audio frequency based market survey method |
GB8824969D0 (en) * | 1988-10-25 | 1988-11-30 | Emi Plc Thorn | Identification codes |
NL8901032A (en) * | 1988-11-10 | 1990-06-01 | Philips Nv | CODER FOR INCLUDING ADDITIONAL INFORMATION IN A DIGITAL AUDIO SIGNAL WITH A PREFERRED FORMAT, A DECODER FOR DERIVING THIS ADDITIONAL INFORMATION FROM THIS DIGITAL SIGNAL, AN APPARATUS FOR RECORDING A DIGITAL SIGNAL ON A CODE OF RECORD. OBTAINED A RECORD CARRIER WITH THIS DEVICE. |
US4943973A (en) * | 1989-03-31 | 1990-07-24 | At&T Company | Spread-spectrum identification signal for communications system |
US4972471A (en) | 1989-05-15 | 1990-11-20 | Gary Gross | Encoding system |
WO1991011062A1 (en) | 1990-01-18 | 1991-07-25 | Young Alan M | Method and apparatus for broadcast media audience measurement |
DE69127842T2 (en) * | 1990-03-09 | 1998-01-29 | At & T Corp | Hybrid perceptual coding of audio signals |
CA2036205C (en) | 1990-06-01 | 1996-11-19 | Russell J. Welsh | Program monitoring unit |
FR2681997A1 (en) * | 1991-09-30 | 1993-04-02 | Arbitron Cy | METHOD AND DEVICE FOR AUTOMATICALLY IDENTIFYING A PROGRAM COMPRISING A SOUND SIGNAL |
US5319735A (en) | 1991-12-17 | 1994-06-07 | Bolt Beranek And Newman Inc. | Embedded signalling |
EP0559348A3 (en) * | 1992-03-02 | 1993-11-03 | AT&T Corp. | Rate control loop processor for perceptual encoder/decoder |
JP3446216B2 (en) * | 1992-03-06 | 2003-09-16 | ソニー株式会社 | Audio signal processing method |
US5379345A (en) | 1993-01-29 | 1995-01-03 | Radio Audit Systems, Inc. | Method and apparatus for the processing of encoded data in conjunction with an audio broadcast |
US5450490A (en) * | 1994-03-31 | 1995-09-12 | The Arbitron Company | Apparatus and methods for including codes in audio signals and decoding |
PL177808B1 (en) | 1994-03-31 | 2000-01-31 | Arbitron Co | Apparatus for and methods of including codes into audio signals and decoding such codes |
US5404377A (en) | 1994-04-08 | 1995-04-04 | Moses; Donald W. | Simultaneous transmission of data and audio signals by means of perceptual coding |
-
1995
- 1995-03-27 PL PL95316631A patent/PL177808B1/en not_active IP Right Cessation
- 1995-03-27 DE DE19581594T patent/DE19581594T1/en not_active Ceased
- 1995-03-27 HU HU0004770A patent/HU219667B/en not_active IP Right Cessation
- 1995-03-27 BR BR9507230A patent/BR9507230A/en not_active IP Right Cessation
- 1995-03-27 CZ CZ19962840A patent/CZ288497B6/en not_active IP Right Cessation
- 1995-03-27 PL PL95333769A patent/PL180441B1/en not_active IP Right Cessation
- 1995-03-27 AT AT0902795A patent/AT410047B/en not_active IP Right Cessation
- 1995-03-27 CN CN95193182.2A patent/CN1149366A/en active Pending
- 1995-03-27 CA CA002185790A patent/CA2185790C/en not_active Expired - Lifetime
- 1995-03-27 PL PL95333766A patent/PL187110B1/en not_active IP Right Cessation
- 1995-03-27 AU AU21969/95A patent/AU709873B2/en not_active Expired
- 1995-03-27 CH CH02383/96A patent/CH694652A5/en not_active IP Right Cessation
- 1995-03-27 HU HU9602628A patent/HU219256B/en not_active IP Right Cessation
- 1995-03-27 HU HU0004768A patent/HU0004768D0/hu unknown
- 1995-03-27 MX MX9604464A patent/MX9604464A/en active IP Right Grant
- 1995-03-27 NZ NZ331166A patent/NZ331166A/en not_active IP Right Cessation
- 1995-03-27 JP JP7525787A patent/JPH10500263A/en active Pending
- 1995-03-27 HU HU0004765A patent/HU219628B/en not_active IP Right Cessation
- 1995-03-27 HU HU0004769A patent/HU219668B/en not_active IP Right Cessation
- 1995-03-27 HU HU0004766A patent/HU0004766D0/hu unknown
- 1995-03-27 WO PCT/US1995/003797 patent/WO1995027349A1/en active IP Right Grant
- 1995-03-27 NZ NZ283612A patent/NZ283612A/en not_active IP Right Cessation
- 1995-03-27 HU HU0004767A patent/HU219627B/en not_active IP Right Cessation
- 1995-03-27 PL PL95333768A patent/PL183573B1/en not_active IP Right Cessation
- 1995-03-27 EP EP95914900A patent/EP0753226B1/en not_active Expired - Lifetime
- 1995-03-27 PL PL95333767A patent/PL183307B1/en not_active IP Right Cessation
- 1995-03-27 GB GB9620181A patent/GB2302000B/en not_active Expired - Lifetime
- 1995-03-30 IL IL11319095A patent/IL113190A/en not_active IP Right Cessation
-
1996
- 1996-09-25 FI FI963827A patent/FI115938B/en not_active IP Right Cessation
- 1996-09-26 NO NO19964062A patent/NO322242B1/en not_active IP Right Cessation
- 1996-09-27 DK DK199601059A patent/DK176762B1/en not_active IP Right Cessation
- 1996-09-30 LU LU88820A patent/LU88820A1/en unknown
- 1996-09-30 SE SE9603570A patent/SE519882C2/en not_active IP Right Cessation
-
1998
- 1998-06-08 US US09/328,766 patent/US6421445B1/en not_active Expired - Lifetime
-
2002
- 2002-07-12 US US10/194,152 patent/US6996237B2/en not_active Expired - Fee Related
-
2005
- 2005-11-04 US US11/267,716 patent/US7961881B2/en not_active Expired - Fee Related
-
2006
- 2006-01-26 JP JP2006018287A patent/JP2006154851A/en active Pending
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2185790A1 (en) | Apparatus and methods for including codes in audio signals and decoding | |
PT753226E (en) | Apparatus and methods for including codes in audio signals and decoding | |
CA2467295A1 (en) | Method and apparatus for increasing receiver immunity to interference | |
FR2702903B1 (en) | Receiver of radio frequency signals. | |
FI883446A (en) | FOERFARANDE FOER TRANSMISSION AV DIGITALISKA AUDIOSIGNALER. | |
EP0673167A3 (en) | Signal encoding and decoding system allowing adding of signals in a form of frequency sample sequence upon decoding. | |
HUT70222A (en) | Apparatus for blocking snoring for sleeping persons | |
WO1997029586A3 (en) | Image data noise filtering | |
DE69419918D1 (en) | METHOD AND DEVICE FOR DETERMINING THE USE OF A SIGNAL | |
AU4766290A (en) | Doppler blood flow system and method using low frequency noise signal processing | |
EP0428173A3 (en) | Radio frequency signal amplifying circuit in radio receiver | |
DE69110225D1 (en) | Noise reduction circuit of an FM receiver. | |
EP0287524A3 (en) | Mixer dynamic control | |
DE69024310T2 (en) | Circuit for video signal noise reduction | |
EP0607898A3 (en) | Pi signal frequency filter and method of manufacture. | |
EP0632597A3 (en) | Audio signal transmitting apparatus and the method thereof. | |
EP0206264A3 (en) | Expanded partial response processing for analog signal enciphering and the like | |
AU1611495A (en) | Shaped digital noise signal generator and method | |
CA2123847A1 (en) | Low Frequency Discriminator Circuit | |
GB9608863D0 (en) | A circuit and method for automatically limiting the amplitude of broadcast audio signals | |
EP0592932A3 (en) | Procedure for attenuating the noise of a video signal, and noise attenuator. | |
GB2311425B (en) | Method of demodulating an input signal and demodulator for performing the method | |
FR2665809B1 (en) | DEVICE FOR IMPROVING THE QUALITY OF ELECTRIC, ELECTRO-ACOUSTIC AND / OR VIDEO SIGNALS. | |
AU6825590A (en) | Method of converting noise suppressed audio signals and an apparatus for the same | |
JPS642455A (en) | Automatic level control circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150327 |