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.

Date of Patent:
Nov. 17, 1998

Filed:

Dec. 12, 1990
Applicant:
Inventors:

Paul S Houle, Costa Mesa, CA (US);

Alfred C Yu, Irvine, CA (US);

David Dvorman, Orange, CA (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ; H03M / ;
U.S. Cl.
CPC ...
341 51 ; 341 67 ; 341 76 ; 341106 ; 341107 ;
Abstract

A method and apparatus for processing data using data compression. During compression, a relationship between a next data word and a previous data word is determined and that relationship is encoded into variable bit-length code words, the bit-length being inversely proportional to the probability of occurrence of the relationship between the data words. The encoded relationships are transmitted rather than the data words themselves. In one embodiment, a look-up table of code words is stored which is indexed according to the possible relationships. A relationship is determined between the previous and next data words and the relationship is matched to the index to find the corresponding code word in the look-up table. The corresponding code word is retrieved from the look-up table, is substituted for the relationship, and is transmitted.


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