Fast approximation to optimal compression of digital data

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United States of America Patent

PATENT NO 9390098
APP PUB NO 20110016097A1
SERIAL NO

12575767

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Abstract

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A “fast approximation” of compression of current data involves using information obtained from an earlier compression of similar data. It overcomes the iterative process of discovering a unique set of optimal symbols. Representatively, a dictionary of symbols corresponding to original data from an earlier compressed file is extracted. Original bits are then obtained from the symbols. Sequences of the original bits are identified in the current data of a current file under consideration. A new bit stream for the current file is created from the original bits and according to the symbols they represent. Every occurrence of the symbols is counted in the new bit stream and a path-weighted Huffman tree is created from the counted occurrences. A coding from the Huffman tree ensues, along with an end-of-file marker. The latter is stored in a new compression file, including the dictionary earlier extracted from the earlier compressed file.

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Patent Owner(s)

Patent OwnerAddress
JPMORGAN CHASE BANK N A AS SUCCESSOR AGENT10 S DEARBORN FLOOR L2 CHICAGO IL 60603

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Teerlink, Craig N Cedar Hills, US 15 193

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