Technique for initiating processing of a data stream of encoded video information
First Claim
1. In a video decompression system having a plurality of pipelined processing stages and an input data stream, the improvement characterized by:
- electrical circuitry for inserting tokens into the data stream, said tokens comprising a SEARCH-- MODE control token; and
a processing stage for receiving said input data stream, said stage including means for recognizing specified patterns in the data stream, and said processing stage entering a mode of operation responsive to said SEARCH-- MODE control token wherein data of the input data stream is ignored until said processing stage recognizes a start code in the data stream whereby said stage provides random access entry to the input data stream and error recovery.
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Accused Products
Abstract
A multi-standard video decompression apparatus has 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.
227 Citations
5 Claims
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1. In a video decompression system having a plurality of pipelined processing stages and an input data stream, the improvement characterized by:
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electrical circuitry for inserting tokens into the data stream, said tokens comprising a SEARCH-- MODE control token; and a processing stage for receiving said input data stream, said stage including means for recognizing specified patterns in the data stream, and said processing stage entering a mode of operation responsive to said SEARCH-- MODE control token wherein data of the input data stream is ignored until said processing stage recognizes a start code in the data stream whereby said stage provides random access entry to the input data stream and error recovery. - View Dependent Claims (2, 3, 4, 5)
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Specification