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

Method 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

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

1991-09-30Priority claimed from FR9111989Aexternal-prioritypatent/FR2681997A1/en

1992-09-22Application filed by Arbitron IncfiledCriticalArbitron Inc

1995-12-20Publication of GB9521505D0publicationCriticalpatent/GB9521505D0/en

1996-02-21Publication of GB2292506ApublicationCriticalpatent/GB2292506A/en

1996-05-01Application grantedgrantedCritical

1996-05-01Publication of GB2292506BpublicationCriticalpatent/GB2292506B/en

2012-09-22Anticipated expirationlegal-statusCritical

StatusExpired - Lifetimelegal-statusCriticalCurrent

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)

GB9521505A1991-09-301992-09-22Method and apparatus for automatically identifying a program including a sound signalExpired - LifetimeGB2292506B (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9111989AFR2681997A1 (en)	1991-09-30	1991-09-30	METHOD AND DEVICE FOR AUTOMATICALLY IDENTIFYING A PROGRAM COMPRISING A SOUND SIGNAL
GB9220005AGB2260246B (en)	1991-09-30	1992-09-22	Method and apparatus for automatically identifying a program including a sound signal

Publications (3)

Publication Number	Publication Date
GB9521505D0 GB9521505D0 (en)	1995-12-20
GB2292506A GB2292506A (en)	1996-02-21
GB2292506Btrue GB2292506B (en)	1996-05-01

Family

ID=26228965

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB9521505AExpired - LifetimeGB2292506B (en)	1991-09-30	1992-09-22	Method and apparatus for automatically identifying a program including a sound signal

Country Status (1)

Country	Link
GB (1)	GB2292506B (en)

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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
US9219969B2 (en)	2013-03-13	2015-12-22	The Nielsen Company (Us), Llc	Methods and systems for reducing spillover by analyzing sound pressure levels
US9219928B2 (en)	2013-06-25	2015-12-22	The Nielsen Company (Us), Llc	Methods and apparatus to characterize households with media meter data
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

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US6560349B1 (en)	1994-10-21	2003-05-06	Digimarc Corporation	Audio monitoring using steganographic information
WO1997033391A1 (en)	1996-03-07	1997-09-12	Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.	Coding process for inserting an inaudible data signal into an audio signal, decoding process, coder and decoder
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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
JP4251378B2 (en)*	1997-05-19	2009-04-08	ヴェランスコーポレーション	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
US6427012B1 (en)	1997-05-19	2002-07-30	Verance Corporation	Apparatus and method for embedding and extracting information in analog signals using replica modulation
US6272176B1 (en)*	1998-07-16	2001-08-07	Nielsen Media Research, Inc.	Broadcast encoding system and method
US7006555B1 (en)	1998-07-16	2006-02-28	Nielsen Media Research, Inc.	Spectral audio encoding
CA2310769C (en)	1999-10-27	2013-05-28	Nielsen Media Research, Inc.	Audio signature extraction and correlation
AU2881300A (en)*	1999-10-27	2001-05-08	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
ATE401645T1 (en)*	2005-01-21	2008-08-15	Unltd Media Gmbh	METHOD FOR EMBEDING A DIGITAL WATERMARK INTO 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
US8533481B2 (en)	2011-11-03	2013-09-10	Verance Corporation	Extraction of embedded watermarks from a host content based on extrapolation techniques
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
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
US8869222B2 (en)	2012-09-13	2014-10-21	Verance Corporation	Second screen content
US8726304B2 (en)	2012-09-13	2014-05-13	Verance Corporation	Time varying evaluation of multimedia 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

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Cited By (46)

* Cited by examiner, † 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
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
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
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
US9264748B2 (en)	2013-03-01	2016-02-16	The Nielsen Company (Us), Llc	Methods and systems for reducing spillover by measuring a crest factor
US9021516B2 (en)	2013-03-01	2015-04-28	The Nielsen Company (Us), Llc	Methods and systems for reducing spillover by measuring a crest factor
US9118960B2 (en)	2013-03-08	2015-08-25	The Nielsen Company (Us), Llc	Methods and systems for reducing spillover by detecting signal distortion
US9332306B2 (en)	2013-03-08	2016-05-03	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
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
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
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

Publication number	Publication date
GB9521505D0 (en)	1995-12-20
GB2292506A (en)	1996-02-21

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
SG46192A1 (en)	1998-02-20	Method and apparatus for positioning transducers
GB8920000D0 (en)	1989-10-18	Apparatus and methods for controlling a signal device
FI103930B1 (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
GB9205932D0 (en)	1992-04-29	Method and apparatus for editing an audio signal
SG171894G (en)	1995-06-16	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
GB2280556B (en)	1997-05-14	Method of processing a signal and apparatus therefor
EP0492961A3 (en)	1992-10-14	Method and apparatus for monitoring a sample
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
HK1007850B (en)	1999-04-23	Method and apparatus for automatically identifying a program including a sound signal

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