Method and apparatus for efficiently decoding variable length en

Details Method and apparatus for efficiently decoding variable length en Method and apparatus for efficiently decoding variable length en

1996-05-13

1999-06-22

Couso, Jose L.

Image analysis

Image compression or coding

G06K 936

Patent

active

059150416

ABSTRACT:
The present invention relates to a method and apparatus for performing decoding of variable length data. It is particularly effective when decoding data encoded with a Huffman or such similar encoding method. The invention employs a plurality of decoding tables which permits a fixed length of bits to be decoded in a minimum number of indexes for the size of the index. Each table is constructed such that the given node indicates whether a unique character has been decoded or whether further decoding is necessary.
For data which is encoded in a manner similar to a Huffman code, a properly constructed table will yield the frequently used characters on a single index. Only less frequently used characters require multiple indexes into the plurality of tables.

REFERENCES:
patent: 4955066 (1990-09-01), Notenboom
patent: 5253053 (1993-10-01), Chu

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