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:
Dec. 01, 2009
Filed:
Feb. 15, 2005
Hiroshi Tabuchi, Hyogo, JP;
Akira Taguchi, Tokyo, JP;
Kazuhiro Shimauchi, Tokyo, JP;
Toshio Morohashi, Hyogo, JP;
Hiroshi Tabuchi, Hyogo, JP;
Akira Taguchi, Tokyo, JP;
Kazuhiro Shimauchi, Tokyo, JP;
Toshio Morohashi, Hyogo, JP;
TOA Corporation, Kobe-shi, JP;
Abstract
To improve the data compression ratio in the data compression/decompression method utilizing the down-sampling process. Image data in a DS area division unit () is divided into a plenty of DS areas and DS areas which are not important are converted into contracted data of the block size by down-sampling in a down-sampling unit (). A relocation unit () allocates two or more contracted data in one DS area, inserts file data into the other portion in the DS area, and removes the DS area where no contracted data is allocated, thereby reducing the entire image size. The image data thus contracted is inputted into a JPEG encoder () and subjected to a DCT process and a quantization process for each block. When performing restoration, decompression is performed by the JPEG decoder and the original location is restored. As for the contracted data, interpolation is performed to restore the image data.