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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
GB2292506B GB9521505A GB9521505A GB2292506B GB 2292506 B GB2292506 B GB 2292506B GB 9521505 A GB9521505 A GB 9521505A GB 9521505 A GB9521505 A GB 9521505A GB 2292506 B GB2292506 B GB 2292506B
Authority
GB
United Kingdom
Prior art keywords
sound signal
program including
automatically identifying
identifying
automatically
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.)
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.)
Filing date
Publication date
Priority claimed from FR9111989A external-priority patent/FR2681997A1/en
Application filed by Arbitron Inc filed Critical Arbitron Inc
Publication of GB9521505D0 publication Critical patent/GB9521505D0/en
Publication of GB2292506A publication Critical patent/GB2292506A/en
Application granted granted Critical
Publication of GB2292506B publication Critical patent/GB2292506B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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)

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

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)

Country Link
GB (1) GB2292506B (en)

Cited By (29)

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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
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

Families Citing this family (32)

* Cited by examiner, † Cited by third party
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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
US6584138B1 (en) 1996-03-07 2003-06-24 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Coding process for inserting an inaudible data signal into an audio signal, decoding process, coder and decoder
DE19640825C2 (en) * 1996-03-07 1998-07-23 Fraunhofer Ges Forschung Encoder for introducing an inaudible data signal into an audio signal and decoder 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
US5940135A (en) 1997-05-19 1999-08-17 Aris Technologies, Inc. Apparatus and method for encoding and decoding information in analog signals
EP1002388B1 (en) * 1997-05-19 2006-08-09 Verance Corporation Apparatus and method for embedding and extracting information in analog signals using distributed signal features
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
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
CA2310769C (en) 1999-10-27 2013-05-28 Nielsen Media Research, Inc. Audio signature extraction and correlation
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
DK1684265T3 (en) * 2005-01-21 2008-11-17 Unltd Media Gmbh Method of embedding a digital watermark into a usable signal
AU2005328684B2 (en) * 2005-03-08 2010-04-22 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
US8838977B2 (en) 2010-09-16 2014-09-16 Verance Corporation Watermark extraction and content screening in a networked environment
US8682026B2 (en) 2011-11-03 2014-03-25 Verance Corporation Efficient extraction of embedded watermarks in the presence of host content distortions
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
US8923548B2 (en) 2011-11-03 2014-12-30 Verance Corporation Extraction of embedded watermarks from a host content using a plurality of 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
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

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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

Patent Citations (5)

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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, † 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

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20120921