Huffman decoder
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United States of America Patent
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Jul 21, 1998
Issued Date -
N/A
app pub date -
Jun 16, 1995
filing date -
Jun 30, 1992
priority date (Note) -
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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. The apparatus includes a Huffman decoder for decoding data words encoded according to the Huffman coding provisions of either H.261, JPEG or MPEG standards. Data words in the tokens include an identifier that identifies the Huffman code standard under which the data words were coded. The Huffman decoder responds to the identifier and converts the received data words to JPEG Huffman coded data words. An index number into a lookup table is associated with each JPEG Huffman coded data word, and a decoded data word is generated corresponding to the index number.
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