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:
Jun. 03, 2003
Filed:
Oct. 02, 2000
Masahiro Oohashi, Fukuoka, JP;
Tsuyoshi Nakamura, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
There is provided a DCT processor for performing at least one of DCT operation and inverse DCT operation for image data in unit blocks having different sizes. This DCT processor is provided with a bit slice circuit ( ) for outputting, bit by bit, the pixel data inputted for each column or row; a first butterfly operation circuit ( ) for subjecting the output data of the bit slice circuit ( ) to butterfly operation; a ROM address generation circuit ( ) for generating continuous ROM addresses; an RAC ( ) for reading the data corresponding to the ROM addresses from ROMs (ROM ˜ROM ) and accumulating the data by accumulation circuits ( ); and a second butterfly operation circuit for subjecting the output data of the RAC to butterfly operation.