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GB2292506B - Method and apparatus for automatically identifying a program including a sound signal

GB2292506B - Method and apparatus for automatically identifying a program including a sound signal - Google PatentsMethod and apparatus for automatically identifying a program including a sound signal Info

Publication number: GB2292506B
Authority: GB; United Kingdom
Prior art keywords: sound signal; program including; automatically identifying; identifying; automatically
Prior art date: 1991-09-30
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.): Expired - Lifetime

Application number

GB9521505A

Other versions

GB9521505D0 (en

GB2292506A (en

Inventor

Michel Fardeau

Michel Briend

Marc Tommasi

Serge Galant

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nielsen Audio Inc

Original Assignee

Arbitron Inc

Priority date (The priority date 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 date listed.)

1991-09-30

Filing date

1992-09-22

Publication date

1996-05-01

1991-09-30 Priority claimed from FR9111989A external-priority patent/FR2681997A1/en

1992-09-22 Application filed by Arbitron Inc filed Critical Arbitron Inc

1995-12-20 Publication of GB9521505D0 publication Critical patent/GB9521505D0/en

1996-02-21 Publication of GB2292506A publication Critical patent/GB2292506A/en

1996-05-01 Application granted granted Critical

1996-05-01 Publication of GB2292506B publication Critical patent/GB2292506B/en

2012-09-22 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

230000005236 sound signal Effects 0.000 title 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
- H04H60/43—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 channels
- 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
- 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

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Multimedia (AREA)
Circuits Of Receivers In General (AREA)

GB9521505A 1991-09-30 1992-09-22 Method and apparatus for automatically identifying a program including a sound signal Expired - Lifetime GB2292506B (en) Applications Claiming Priority (2) Application Number Priority Date Filing Date Title FR9111989A FR2681997A1 (en) 1991-09-30 1991-09-30 METHOD AND DEVICE FOR AUTOMATICALLY IDENTIFYING A PROGRAM COMPRISING A SOUND SIGNAL GB9220005A GB2260246B (en) 1991-09-30 1992-09-22 Method and apparatus for automatically identifying a program including a sound signal Publications (3) Family ID=26228965 Family Applications (1) Application Number Title Priority Date Filing Date GB9521505A Expired - Lifetime GB2292506B (en) 1991-09-30 1992-09-22 Method and apparatus for automatically identifying a program including a sound signal Country Status (1) Cited By (29) * Cited by examiner, â Cited by third party Publication number Priority date Publication date Assignee Title US6879652B1 (en) 2000-07-14 2005-04-12 Nielsen Media Research, Inc. Method for encoding an input signal US6968564B1 (en) 2000-04-06 2005-11-22 Nielsen Media Research, Inc. Multi-band spectral audio encoding US7181022B2 (en) 1993-11-18 2007-02-20 Digimarc Corporation Audio watermarking to convey auxiliary information, and media embodying same US7248717B2 (en) 1994-11-16 2007-07-24 Digimarc Corporation Securing media content with steganographic encoding US7643649B2 (en) 1993-11-18 2010-01-05 Digimarc Corporation Integrating digital watermarks in multimedia content US7739705B2 (en) 2004-09-27 2010-06-15 The Nielsen Company (Us), Llc Methods and apparatus for using location information to manage spillover in an audience monitoring system US7756290B2 (en) 2000-01-13 2010-07-13 Digimarc Corporation Detecting embedded signals in media content using coincidence metrics US8204222B2 (en) 1993-11-18 2012-06-19 Digimarc Corporation Steganographic encoding and decoding of auxiliary codes in media signals US8406341B2 (en) 2004-01-23 2013-03-26 The Nielsen Company (Us), Llc Variable encoding and detection apparatus and methods US8451086B2 (en) 2000-02-16 2013-05-28 Verance Corporation Remote control signaling using audio watermarks US8549307B2 (en) 2005-07-01 2013-10-01 Verance Corporation Forensic marking using a common customization function US8548373B2 (en) 2002-01-08 2013-10-01 The Nielsen Company (Us), Llc Methods and apparatus for identifying a digital audio signal US8745404B2 (en) 1998-05-28 2014-06-03 Verance Corporation Pre-processed information embedding system US8806517B2 (en) 2002-10-15 2014-08-12 Verance Corporation Media monitoring, management and information system US8824242B2 (en) 2010-03-09 2014-09-02 The Nielsen Company (Us), Llc Methods, systems, and apparatus to calculate distance from audio sources US8885842B2 (en) 2010-12-14 2014-11-11 The Nielsen Company (Us), Llc Methods and apparatus to determine locations of audience members US9021516B2 (en) 2013-03-01 2015-04-28 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by measuring a crest factor US9106964B2 (en) 2012-09-13 2015-08-11 Verance Corporation Enhanced content distribution using advertisements US9118960B2 (en) 2013-03-08 2015-08-25 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by detecting signal distortion US9153006B2 (en) 2005-04-26 2015-10-06 Verance Corporation Circumvention of watermark analysis in a host content US9191704B2 (en) 2013-03-14 2015-11-17 The Nielsen Company (Us), Llc Methods and systems for reducing crediting errors due to spillover using audio codes and/or signatures US9208334B2 (en) 2013-10-25 2015-12-08 Verance Corporation Content management using multiple abstraction layers US9219928B2 (en) 2013-06-25 2015-12-22 The Nielsen Company (Us), Llc Methods and apparatus to characterize households with media meter data US9219969B2 (en) 2013-03-13 2015-12-22 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by analyzing sound pressure levels US9262794B2 (en) 2013-03-14 2016-02-16 Verance Corporation Transactional video marking system US9426525B2 (en) 2013-12-31 2016-08-23 The Nielsen Company (Us), Llc. Methods and apparatus to count people in an audience US9571606B2 (en) 2012-08-31 2017-02-14 Verance Corporation Social media viewing system US9596521B2 (en) 2014-03-13 2017-03-14 Verance Corporation Interactive content acquisition using embedded codes US11568439B2 (en) 2006-12-29 2023-01-31 The Nielsen Company (Us), Llc Systems and methods to pre-scale media content to facilitate audience measurement Families Citing this family (32) * Cited by examiner, â Cited by third party Publication number Priority date Publication date Assignee Title US6449377B1 (en) 1995-05-08 2002-09-10 Digimarc Corporation Methods and systems for watermark processing of line art images US6560349B1 (en) 1994-10-21 2003-05-06 Digimarc Corporation Audio monitoring using steganographic information ATE184140T1 (en) 1996-03-07 1999-09-15 Fraunhofer Ges Forschung CODING METHOD FOR INTRODUCING A NON-AUDIBLE DATA SIGNAL INTO AN AUDIO SIGNAL, DECODING METHOD, CODER AND DECODER DE19640814C2 (en) * 1996-03-07 1998-07-23 Fraunhofer Ges Forschung Coding method for introducing an inaudible data signal into an audio signal and method for decoding a data signal contained inaudibly in an audio signal US5828325A (en) * 1996-04-03 1998-10-27 Aris Technologies, Inc. Apparatus and method for encoding and decoding information in analog signals FR2759230B1 (en) * 1997-02-06 1999-04-30 Info Telecom METHODS OF INSERTING AND DECODING A DIGITAL MESSAGE INTO A CARRIER ACOUSTIC SIGNAL, AND CORRESPONDING DEVICES US6427012B1 (en) 1997-05-19 2002-07-30 Verance Corporation Apparatus and method for embedding and extracting information in analog signals using replica modulation WO1998053565A1 (en) * 1997-05-19 1998-11-26 Aris Technologies, Inc. Apparatus and method for embedding and extracting information in analog signals using distributed signal features US5940135A (en) 1997-05-19 1999-08-17 Aris Technologies, Inc. Apparatus and method for encoding and decoding information in analog signals 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 CA2809775C (en) 1999-10-27 2017-03-21 The Nielsen Company (Us), Llc Audio signature extraction and correlation EP1277295A1 (en) * 1999-10-27 2003-01-22 Nielsen Media Research, Inc. System and method for encoding an audio signal for use in broadcast program identification systems, by adding inaudible codes to the audio signal US7466742B1 (en) 2000-04-21 2008-12-16 Nielsen Media Research, Inc. Detection of entropy in connection with audio signals WO2005041109A2 (en) 2003-10-17 2005-05-06 Nielsen Media Research, Inc. Methods and apparatus for identifiying audio/video content using temporal signal characteristics SI1684265T1 (en) * 2005-01-21 2008-12-31 Unltd Media Gmbh Method of embedding a digital watermark in a useful signal CA2601037C (en) * 2005-03-08 2017-04-04 Nielsen Media Research, Inc. Variable encoding and detection apparatus and methods US8781967B2 (en) 2005-07-07 2014-07-15 Verance Corporation Watermarking in an encrypted domain US8259938B2 (en) 2008-06-24 2012-09-04 Verance Corporation Efficient and secure forensic marking in compressed US8838978B2 (en) 2010-09-16 2014-09-16 Verance Corporation Content access management using extracted watermark information US8682026B2 (en) 2011-11-03 2014-03-25 Verance Corporation Efficient extraction of embedded watermarks in the presence of host content distortions US8923548B2 (en) 2011-11-03 2014-12-30 Verance Corporation Extraction of embedded watermarks from a host content using a plurality of tentative watermarks US8615104B2 (en) 2011-11-03 2013-12-24 Verance Corporation Watermark extraction based on tentative watermarks US8533481B2 (en) 2011-11-03 2013-09-10 Verance Corporation Extraction of embedded watermarks from a host content based on extrapolation techniques US8745403B2 (en) 2011-11-23 2014-06-03 Verance Corporation Enhanced content management based on watermark extraction records US9323902B2 (en) 2011-12-13 2016-04-26 Verance Corporation Conditional access using embedded watermarks US9547753B2 (en) 2011-12-13 2017-01-17 Verance Corporation Coordinated watermarking US8726304B2 (en) 2012-09-13 2014-05-13 Verance Corporation Time varying evaluation of multimedia content US8869222B2 (en) 2012-09-13 2014-10-21 Verance Corporation Second screen content US9251549B2 (en) 2013-07-23 2016-02-02 Verance Corporation Watermark extractor enhancements based on payload ranking 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 US9848222B2 (en) 2015-07-15 2017-12-19 The Nielsen Company (Us), Llc Methods and apparatus to detect spillover Citations (5) * Cited by examiner, â Cited by third party Publication number Priority date Publication date Assignee Title US3004104A (en) * 1954-04-29 1961-10-10 Muzak Corp Identification of sound and like signals US4703476A (en) * 1983-09-16 1987-10-27 Audicom Corporation Encoding of transmitted program material EP0245037A2 (en) * 1986-05-06 1987-11-11 Thorn Emi Plc Signal identification EP0366381A2 (en) * 1988-10-25 1990-05-02 THORN EMI plc Signal identification system US4972471A (en) * 1989-05-15 1990-11-20 Gary Gross Encoding system

1992
- 1992-09-22 GB GB9521505A patent/GB2292506B/en not_active Expired - Lifetime

Patent Citations (5) * Cited by examiner, â Cited by third party Publication number Priority date Publication date Assignee Title US3004104A (en) * 1954-04-29 1961-10-10 Muzak Corp Identification of sound and like signals US4703476A (en) * 1983-09-16 1987-10-27 Audicom Corporation Encoding of transmitted program material EP0245037A2 (en) * 1986-05-06 1987-11-11 Thorn Emi Plc Signal identification EP0366381A2 (en) * 1988-10-25 1990-05-02 THORN EMI plc Signal identification system US4972471A (en) * 1989-05-15 1990-11-20 Gary Gross Encoding system Cited By (46) * Cited by examiner, â Cited by third party Publication number Priority date Publication date Assignee Title US8204222B2 (en) 1993-11-18 2012-06-19 Digimarc Corporation Steganographic encoding and decoding of auxiliary codes in media signals US7181022B2 (en) 1993-11-18 2007-02-20 Digimarc Corporation Audio watermarking to convey auxiliary information, and media embodying same US7643649B2 (en) 1993-11-18 2010-01-05 Digimarc Corporation Integrating digital watermarks in multimedia content US7248717B2 (en) 1994-11-16 2007-07-24 Digimarc Corporation Securing media content with steganographic encoding US9117270B2 (en) 1998-05-28 2015-08-25 Verance Corporation Pre-processed information embedding system US8745404B2 (en) 1998-05-28 2014-06-03 Verance Corporation Pre-processed information embedding system US7756290B2 (en) 2000-01-13 2010-07-13 Digimarc Corporation Detecting embedded signals in media content using coincidence metrics US8027510B2 (en) 2000-01-13 2011-09-27 Digimarc Corporation Encoding and decoding media signals US8107674B2 (en) 2000-02-04 2012-01-31 Digimarc Corporation Synchronizing rendering of multimedia content US8791789B2 (en) 2000-02-16 2014-07-29 Verance Corporation Remote control signaling using audio watermarks US8451086B2 (en) 2000-02-16 2013-05-28 Verance Corporation Remote control signaling using audio watermarks US9189955B2 (en) 2000-02-16 2015-11-17 Verance Corporation Remote control signaling using audio watermarks US6968564B1 (en) 2000-04-06 2005-11-22 Nielsen Media Research, Inc. Multi-band spectral audio encoding US6879652B1 (en) 2000-07-14 2005-04-12 Nielsen Media Research, Inc. Method for encoding an input signal US7451092B2 (en) 2000-07-14 2008-11-11 Nielsen Media Research, Inc. A Delaware Corporation Detection of signal modifications in audio streams with embedded code US8548373B2 (en) 2002-01-08 2013-10-01 The Nielsen Company (Us), Llc Methods and apparatus for identifying a digital audio signal US8806517B2 (en) 2002-10-15 2014-08-12 Verance Corporation Media monitoring, management and information system US8761301B2 (en) 2004-01-23 2014-06-24 The Nielsen Company (Us), Llc Variable encoding and detection apparatus and methods US9210416B2 (en) 2004-01-23 2015-12-08 The Nielsen Company (Us), Llc Variable encoding and detection apparatus and methods US8406341B2 (en) 2004-01-23 2013-03-26 The Nielsen Company (Us), Llc Variable encoding and detection apparatus and methods US9094710B2 (en) 2004-09-27 2015-07-28 The Nielsen Company (Us), Llc Methods and apparatus for using location information to manage spillover in an audience monitoring system US7739705B2 (en) 2004-09-27 2010-06-15 The Nielsen Company (Us), Llc Methods and apparatus for using location information to manage spillover in an audience monitoring system US9153006B2 (en) 2005-04-26 2015-10-06 Verance Corporation Circumvention of watermark analysis in a host content US9009482B2 (en) 2005-07-01 2015-04-14 Verance Corporation Forensic marking using a common customization function US8549307B2 (en) 2005-07-01 2013-10-01 Verance Corporation Forensic marking using a common customization function US11568439B2 (en) 2006-12-29 2023-01-31 The Nielsen Company (Us), Llc Systems and methods to pre-scale media content to facilitate audience measurement US8824242B2 (en) 2010-03-09 2014-09-02 The Nielsen Company (Us), Llc Methods, systems, and apparatus to calculate distance from audio sources US9250316B2 (en) 2010-03-09 2016-02-02 The Nielsen Company (Us), Llc Methods, systems, and apparatus to synchronize actions of audio source monitors US9217789B2 (en) 2010-03-09 2015-12-22 The Nielsen Company (Us), Llc Methods, systems, and apparatus to calculate distance from audio sources US8855101B2 (en) 2010-03-09 2014-10-07 The Nielsen Company (Us), Llc Methods, systems, and apparatus to synchronize actions of audio source monitors US8885842B2 (en) 2010-12-14 2014-11-11 The Nielsen Company (Us), Llc Methods and apparatus to determine locations of audience members US9258607B2 (en) 2010-12-14 2016-02-09 The Nielsen Company (Us), Llc Methods and apparatus to determine locations of audience members US9571606B2 (en) 2012-08-31 2017-02-14 Verance Corporation Social media viewing system US9106964B2 (en) 2012-09-13 2015-08-11 Verance Corporation Enhanced content distribution using advertisements US9021516B2 (en) 2013-03-01 2015-04-28 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by measuring a crest factor US9264748B2 (en) 2013-03-01 2016-02-16 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by measuring a crest factor US9332306B2 (en) 2013-03-08 2016-05-03 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by detecting signal distortion US9118960B2 (en) 2013-03-08 2015-08-25 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by detecting signal distortion US9219969B2 (en) 2013-03-13 2015-12-22 The Nielsen Company (Us), Llc Methods and systems for reducing spillover by analyzing sound pressure levels US9191704B2 (en) 2013-03-14 2015-11-17 The Nielsen Company (Us), Llc Methods and systems for reducing crediting errors due to spillover using audio codes and/or signatures US9262794B2 (en) 2013-03-14 2016-02-16 Verance Corporation Transactional video marking system US9380339B2 (en) 2013-03-14 2016-06-28 The Nielsen Company (Us), Llc Methods and systems for reducing crediting errors due to spillover using audio codes and/or signatures US9219928B2 (en) 2013-06-25 2015-12-22 The Nielsen Company (Us), Llc Methods and apparatus to characterize households with media meter data US9208334B2 (en) 2013-10-25 2015-12-08 Verance Corporation Content management using multiple abstraction layers US9426525B2 (en) 2013-12-31 2016-08-23 The Nielsen Company (Us), Llc. Methods and apparatus to count people in an audience US9596521B2 (en) 2014-03-13 2017-03-14 Verance Corporation Interactive content acquisition using embedded codes Also Published As Similar Documents Publication Publication Date Title GB2292506B (en) 1996-05-01 Method and apparatus for automatically identifying a program including a sound signal GB2219464B (en) 1992-09-23 Method and apparatus for processing a still picture signal ZA964876B (en) 1997-01-07 Method and apparatus for amplifying a signal EP0451649A3 (en) 1993-01-13 Method and apparatus for determining the location of a sound source GB2237166B (en) 1994-04-06 Apparatus and method for transmitting a data signal ZA892274B (en) 1989-11-29 Method and apparatus for processing sound signals IL91464A0 (en) 1990-04-29 Method and apparatus for sound imaging EP0461915A3 (en) 1993-05-05 Method and apparatus for performing a seek ZA896745B (en) 1991-01-30 Sound imaging method and apparatus EP0462381A3 (en) 1993-01-13 Method and apparatus for processing audio signal HK1000069A1 (en) 1997-11-07 Method and apparatus for positioning transducers GB8920000D0 (en) 1989-10-18 Apparatus and methods for controlling a signal device FI103930B (en) 1999-10-15 Apparatus and method for processing a sound signal GB9303887D0 (en) 1993-04-21 An apparatus and a method for automatically measuring the density of an object EP0561454A3 (en) 1994-05-18 Method and apparatus for editing an audio signal HK9595A (en) 1995-01-27 A method and device for processing an analog signal GB2232024B (en) 1994-01-12 Method and apparatus for recording and/or producing sound GB2326714B (en) 2000-06-21 A method of and apparatus for determining the quality of seismic data EP0469622A3 (en) 1992-10-21 Method and apparatus for demodulating a biphase-coded signal GB2269301B (en) 1996-01-03 Method and apparatus for detecting a signal sequence EP0589595A3 (en) 1994-09-28 Method and apparatus for detecting a supervisory audio tone EP0704840A3 (en) 1996-08-21 Tape dubbing and copy guard signal inserting method and apparatus GB9101771D0 (en) 1991-03-13 Method and apparatus for processing a signal AU5950590A (en) 1990-12-18 A method and an apparatus for identifying an object EP0448164A3 (en) 1992-09-09 Method and apparatus for processing a signal Legal Events Date Code Title Description 1999-07-21 732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) 2012-10-17 PE20 Patent expired after termination of 20 years

Expiry date: 20120921

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