CA2147013A1 - Muting apparatus for a compressed audio/video signal receiver - Google Patents

Muting apparatus for a compressed audio/video signal receiver

Info

Publication number
CA2147013A1
CA2147013A1 CA002147013A CA2147013A CA2147013A1 CA 2147013 A1 CA2147013 A1 CA 2147013A1 CA 002147013 A CA002147013 A CA 002147013A CA 2147013 A CA2147013 A CA 2147013A CA 2147013 A1 CA2147013 A1 CA 2147013A1
Authority
CA
Canada
Prior art keywords
audio
video
component
synchronization
compressed audio
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
Application number
CA002147013A
Other languages
French (fr)
Other versions
CA2147013C (en
Inventor
Douglas Edward Lankford
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics 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
Application filed by Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of CA2147013A1 publication Critical patent/CA2147013A1/en
Application granted granted Critical
Publication of CA2147013C publication Critical patent/CA2147013C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H04N21/4396—Processing of audio elementary streams by muting the audio signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/602—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for digital sound signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
    • H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
    • H04N7/56—Synchronising systems therefor

Abstract

A compressed audio/video, A/V, receiver provides A/V component timing reference signals (PTS's) coincident with reproduction of associated decompressed component signals. Synchronization apparatus generates a function of the difference of occurring component audio and video PTS's. This function, which is indicative of relative audio and video synchronization, is compared with a predetermined threshold value, and a mute control signal is generated when the threshold is exceeded. Muting circuitry, responsive to the control signal disables audio reproduction when the reproduced audio and video component signal timing deviate from mutual synchronization.
CA002147013A 1994-05-17 1995-04-13 Muting apparatus for a compressed audio/video signal receiver Expired - Fee Related CA2147013C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US245,113 1994-05-17
US08/245,113 US5467139A (en) 1993-09-30 1994-05-17 Muting apparatus for a compressed audio/video signal receiver

Publications (2)

Publication Number Publication Date
CA2147013A1 true CA2147013A1 (en) 1995-11-18
CA2147013C CA2147013C (en) 2004-12-07

Family

ID=22925345

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002147013A Expired - Fee Related CA2147013C (en) 1994-05-17 1995-04-13 Muting apparatus for a compressed audio/video signal receiver

Country Status (12)

Country Link
US (1) US5467139A (en)
EP (1) EP0683604B1 (en)
JP (1) JP3932059B2 (en)
KR (1) KR100366401B1 (en)
CN (1) CN1088305C (en)
BR (1) BR9502039A (en)
CA (1) CA2147013C (en)
DE (1) DE69527573T2 (en)
MY (1) MY112618A (en)
PL (1) PL177313B1 (en)
RU (1) RU2150792C1 (en)
TW (1) TW325632B (en)

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Also Published As

Publication number Publication date
EP0683604A3 (en) 1998-10-28
PL308615A1 (en) 1995-11-27
CN1116390A (en) 1996-02-07
JP3932059B2 (en) 2007-06-20
TW325632B (en) 1998-01-21
BR9502039A (en) 1996-01-16
PL177313B1 (en) 1999-10-29
RU2150792C1 (en) 2000-06-10
EP0683604B1 (en) 2002-07-31
CA2147013C (en) 2004-12-07
US5467139A (en) 1995-11-14
CN1088305C (en) 2002-07-24
KR100366401B1 (en) 2003-02-26
JPH0846884A (en) 1996-02-16
DE69527573D1 (en) 2002-09-05
EP0683604A2 (en) 1995-11-22
DE69527573T2 (en) 2003-01-09
KR950035369A (en) 1995-12-30
RU95107648A (en) 1997-02-10
MY112618A (en) 2001-07-31

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