Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1995-01-27
1997-04-08
Tran, Thai Q.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 95, 386124, H04N 576, G11B 509, G11B 502, G11C 1518
Patent
active
056193378
ABSTRACT:
A system records a single program from a multi-program transport stream that is encoded according to the MPEG-2 standard. The system demultiplexes transport packets from the multi-program transport stream and records the demultiplexed packets on a digital video cassette recorder (DVCR). The system includes circuitry in the encoder which emulates a buffer in the digital recorder that is used to hold the packets to convert the bursty packet data into constant rate data for recording. This emulated buffer controls the overall rate at which packets of the selected program are inserted into the multi-program transport stream by the encoder. As each packet is recorded, a time stamp value, representing when the packet was demultiplexed and a clock count value, representing a number of pulses of a high-frequency system clock signal that occurred during a predetermined number of bytes of the demultiplexed packet are recorded with the demultiplexed packet. These values are used to regenerate timing signals for a single program transport stream when the recorded packet data is replayed from the tape.
REFERENCES:
patent: 5291486 (1994-03-01), Koyanagi
patent: 5294974 (1994-03-01), Naimpally et al.
patent: 5396497 (1995-03-01), Veltman
patent: 5414455 (1995-05-01), Hooper et al.
patent: 5455684 (1995-10-01), Fujinami et al.
patent: 5481543 (1996-01-01), Veltman
A. Guha et al., "Multichannel Joint Rate Control of VBR MPEG Encoded Video for DBS Applications", IEEE Transactions on Consumer Electronics, vol. 40, No. 3, pp. 616-623, Aug. 1994.
MPEG-2 system standard, ISO/IEC HTC1/CS29/WG11 NO721, rev 10, pp. 11-21, Jun. 1994.
Din Luanne P.
Matsushita Electric Corporation of America
Tran Thai Q.
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