System for microprogrammable state machine in video parser disabling portion of processing stages responsive to sequence.sub.-- end token generating by token generator responsive to received data
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United States of America Patent
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Mar 2, 1999
Issued Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 24, 1993
priority date (Note) -
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Abstract
An MPEG video decompression method and apparatus utilizing a plurality of stages interconnected by a two-wire interface arranged as a pipeline processing machine. Control tokens and DATA Tokens pass over the single two-wire interface for carrying both control and data in token format. A token decode circuit is positioned in certain of the stages for recognizing certain of the tokens as control tokens pertinent to that stage and for passing unrecognized control tokens along the pipeline. Reconfiguration processing circuits are positioned in selected stages and are responsive to a recognized control token for reconfiguring such stage to handle an identified DATA Token. A wide variety of unique supporting subsystem circuitry and processing techniques are disclosed for implementing the system, including memory addressing, transforming data using a common processing block, time synchronization, asynchronous swing buffering, storing of video information, a parallel Huffman decoder, and the like.
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