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. 17, 2000
Filed:
Dec. 16, 1994
Applicant:
Inventor:
Hideyuki Terane, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382233 ; 382246 ;
Abstract
Multiplications in an inverse quantization portion (202) are limited to only multiplications of an effective coefficient (NZ) by a quantization coefficient (Qi) corresponding thereto. An inverse zigzag transform is performed such that fixed values '0', the number of which corresponds to a block of Huffman codes, are previously arranged and the effective coefficient (NZ) is then overwritten in corresponding positions, rather than arranging data including the fixed values '0' and the effective coefficient (NZ). Thus, multiplications of ineffective coefficients are not required and the Huffman codes are decoded at a high speed.