Television – Synchronization – Locking of video or audio to reference timebase
Patent
1996-02-26
1998-07-21
Lee, Michael B.
Television
Synchronization
Locking of video or audio to reference timebase
348423, 370509, 370474, 375362, 375376, H04N 9475, H04N 701
Patent
active
057841195
ABSTRACT:
In a video decoding device, a system decoding section analyzes header information included in multiplex data and performs various operations, including the separation of data, on the basis of the header information. An STC (System Time Clock) counter generates, based on an SCR (System Clock Reference)/PCR (Program Clock Reference) which is time reference data included in the multiplex data, a system clock synchronous to the system clock of a coding device. A video decoding section decodes video data included in the multiplex data in response to the system clock. Also, the video decoding section generates a clock for video display synchronous to the system clock and outputs the decoded video data in response to the clock for video display. The decoding device may additionally include an audio decoding section for decoding audio data included in the multiplex data in response to the system clock, generating a clock for audio output and synchronous to the system clock, and outputting the decoded audio data in response to the clock for audio output. The decoding device obviates frame slipping and other errors even when the clock of an input system, i.e., the coding side and the clock for representation at the decoding side are different from each other.
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ITU-T (International Telecommunication Union-telecommunication Recommendation H.222.0, "General Coding of Moving Pictures and Associated Audio" Geneva 1995, pp. 43-209, of which an English translation is not now available.
International Organization for Standardization, ISO/IEC JTC1/SC29/WG11, "Coding of Moving Pictures and Associated Audio", Nov. 1993.
Goto Eiitsu
Nakajima Hiroshi
Noda Yasumasa
Lee Michael B.
OKI Electric Industry Co., Ltd.
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