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:
May. 07, 1985
Filed:
Feb. 26, 1982
Applicant:
Inventor:
James A Kenemuth, Palo Alto, CA (US);
Assignee:
Prentice Corporation, Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
375 37 ; 358261 ; 3403 / ; 375122 ;
Abstract
A character base input data stream is encoded in compressed form by using a histogram of a sample of the data stream to determine the frequency of appearance of characters in the stream. A code for a character M+1 is generated in an encoder (112) to be of a length which is an inverse function of the frequency of appearance of character M+1 in the preceding M characters in the sample. Decoding can be achieved by forming a comparable sample window in a decoder (118) to which is applied an estimated index of the incoming character being decoded.