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. 05, 2000
Filed:
Feb. 26, 1998
Shuji Abe, Setagaya-ku, JP;
Michihiro Fukushima, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In the image decoding apparatus, the maximum absolute value of difference values of adjacent pixel data of each pixel block of image data is obtained as a feature of the image data. An optimum quantizing coefficient is selected for the maximum absolute value of the difference value. With the selected quantizing coefficient, the maximum absolute value is quantized. When the difference values of adjacent pixel data of each pixel block of image data concentrate in the vicinity of '0', they are quantized with a smaller quantizing coefficient. Thus, with an optimum quantizing coefficient, each pixel block of image data can be quantized. Consequently, quantizing errors can be reduced.