Television – Synchronization – Locking of video or audio to reference timebase
Patent
1996-03-29
1998-10-06
Chin, Wellington
Television
Synchronization
Locking of video or audio to reference timebase
348465, 3488453, 370392, 370473, H04L 700
Patent
active
058185399
ABSTRACT:
A transport decoder 110, for receiving and processing a transport data stream using MPEG-2 formats, includes connections to a physical layer channel interface (channel interface) 112, a buffer memory 114, a host microprocessor 116, audio and video decoders 118/120, and clock signal circuitry 122. Upon receipt of a discontinuity indicator, the transport packet headers are parsed and transport packet payloads are stored in memory. Subsequently, upon receipt of a next program counter reference (PCR) value, a counter is loaded with the received program counter reference value. Next, the data stored in memory is searched for a time stamp and, when one is found, the time stamp is retrieved. Finally, a timer interrupt is set for a point in time approximately one frame time before the time stamp value, and, when the timer interrupt occurs, the program counter reference value is sent to the decoders, thereby providing sufficient time for the decoders to process data.
REFERENCES:
patent: 5517250 (1996-05-01), Hoogenboom et al.
patent: 5588029 (1996-12-01), Maturi et al.
patent: 5650825 (1997-07-01), Naimpally et al.
patent: 5675654 (1997-10-01), Ryan
patent: 5699392 (1997-12-01), Dokic
patent: 5703877 (1997-12-01), Nuber et al.
Zoran Corporation, "Six Channel Dolby Digital Surround Processor", ZR38500, Nov. 1994, pp. 1-28.
C-Cube Microsystems, "CL9100 Multimode Video Decoder User's Manual", Preliminary Release, Oct. 19, 1994.
Meyer Edwin Robert
Naimpally Saiprasad V.
O'Hara Joseph P.
Ryan Robert T.
Chin Wellington
Hyun Soon-Dong
Matsushita Electric Corporation of America
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