Fast JPEG huffman encoding and decoding

Details Fast JPEG huffman encoding and decoding Fast JPEG huffman encoding and decoding

2007-11-27

2007-11-27

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from number of pulses

C341S051000, C341S061000

Reissue Patent

active

10824613

ABSTRACT:
Huffman encoding, particularly from a packed data format, is simplified by using two different table formats depending on code length. Huffman tables are also reduced in size thereby. Decoding is performed in reduced time by testing for the length of valid Huffman codes in a compressed data stream and using an offset corresponding to a test criterion yielding a particular test result to provide a direct index into Huffman table symbol values while greatly reducing the size of look-up tables used for such a purpose.

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