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:
Nov. 23, 2010
Filed:
Oct. 11, 2007
Toshihiro Tanaka, Hyogo, JP;
Keiichi Ishida, Hyogo, JP;
Toshihiro Tanaka, Hyogo, JP;
Keiichi Ishida, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A coder has a binarizing circuit () for converting multivalued data into a binary symbol sequence, the multivalued data being generated from an input signal and having a plurality of contexts, an arithmetic code amount approximating circuit () for calculating a prediction code amount in the predetermined coding unit from the binary symbol sequence, and a coding circuit () for coding the input signal arithmetically on the basis of the prediction code amount. The arithmetic code amount approximating circuit () includes a selector () for dividing the binary symbol sequence into a plurality of groups based on the contexts, a plurality of code amount approximating circuits (-) for calculating, from the binary symbol sequence divided into a plurality of groups, the prediction code amount of the group based on at least the section range in arithmetic coding, and an adder () for adding the prediction code amounts from all code amount approximating circuits and outputting the prediction code amount in the specified coding unit.