Multistandard video decoder and decompression system for processing encoded bit streams including start codes and methods relating thereto
First Claim
1. A pipelined video decoder and decompression system for handling a plurality of separately encoded bit streams, said system comprising:
- a start code detector responsive to a single serial bit stream for generating control tokens and data tokens, said token including a plurality of data words, each data word having an extension bit which indicates a presence of additional words therein so that said start code detector detects overlapping start codes in said bit stream, a first start code thereby being ignored and a second start code used to create start code tokens;
a token decode circuit interactively associated with said start code detector, said token decode circuit for recognizing certain of said tokens as control tokens pertinent to a respective processing stage and for passing unrecognized control tokens to a succeeding stage; and
a reconfigurable decode and parser processing means responsive to a recognized control token for reconfiguring a particular stage to handle an identified data.
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Accused Products
Abstract
A pipeline video decoder and decompression system handles a plurality of separately encoded bit streams arranged as a single serial bit stream of digital bits and having separately encoded pairs of control codes and corresponding data carried in the serial bit stream. The pipeline system employs a plurality of interconnected stages to decode and decompress the single bit stream, including a start code detector. When in a search mode, the start code detector searches for a specific start code corresponding to one of multiple compression standards. The start code detector responding to the single serial bit stream generates control tokens and data tokens. A respective one of the tokens includes a plurality of data words. Each data word has an extension bit which indicates a presence of additional words therein. The data words are thereby unlimited in number. A token decode circuit positioned in certain of the stages recognizes certain of the tokens as control tokens pertinent to that stage and passes unrecognized control tokens to a succeeding stage. A reconfigurable decode and parser processing means positioned in certain of the stages is responsive to a recognized control token and reconfigures a particular stage to handle an identified data token. Methods relating to the decoder and decompression system include processing steps relating thereto.
283 Citations
4 Claims
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1. A pipelined video decoder and decompression system for handling a plurality of separately encoded bit streams, said system comprising:
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a start code detector responsive to a single serial bit stream for generating control tokens and data tokens, said token including a plurality of data words, each data word having an extension bit which indicates a presence of additional words therein so that said start code detector detects overlapping start codes in said bit stream, a first start code thereby being ignored and a second start code used to create start code tokens; a token decode circuit interactively associated with said start code detector, said token decode circuit for recognizing certain of said tokens as control tokens pertinent to a respective processing stage and for passing unrecognized control tokens to a succeeding stage; and a reconfigurable decode and parser processing means responsive to a recognized control token for reconfiguring a particular stage to handle an identified data. - View Dependent Claims (2, 3, 4)
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Specification