Television – Bandwidth reduction system – Data rate reduction
Patent
1996-12-19
1999-04-13
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348462, 386 98, H04N 712, H04N 1102, H04N 1104
Patent
active
058943285
ABSTRACT:
A digital signal multiplexing method in which plural bitstreams can be multiplexed without buffer rupture at the time of decoding. At a step S1, the time of extracting each accessing unit AU, which is a processing unit prescribed from one bitstream to another, from a buffer to an associated decoder, from input plural bitstreams, is computed. At the next step S2, the constraint time concerning the delivery start time to the buffer of each accessing unit, is back-computed by processing proceeding in a temporally retrogressive direction, using the data of the extraction time of the accessing units AU, and by reading charging of the accessing units to the decoder buffers for the extraction of the accessing units from the decoder buffers. At the next step S3, the schedule of packetizing the accessing units is determined on the basis of the constraint time as found at step S2, by way of performing the scheduling. The plural bitstreams are multiplexed in accordance with the schedule.
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Chin Tommy P.
Sony Corporation
Vo Tung T.
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