The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1999
Filed:
Aug. 22, 1997
Applicant:
Inventor:
Douglas P Chinnock, Tucson, AZ (US);
Assignee:
America Online, Inc., Dulles, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
382244 ; 395114 ;
Abstract
A data compression method that uses selective encoding is disclosed. A block of data is compressed using a combination of the LZ77 and Huffman coding techniques. Each compressed block consists of a pair of Huffman code trees that describe the representation of the compressed data part and a compressed data part. Compressed data may consist of literal data that has not been detected as duplicated and length/backward pairs indicating the location of a duplicated string. Compressed data is arranged in a deflate format.