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. 02, 1997
Filed:
Sep. 27, 1995
Kenji Kishi, Yokohama, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A DCT circuit converts a specific block scanning signal into DCT coefficients. An encoder quantizes and Huffman-codes the image signal converted into DCT coefficients to compress it. A code memory stores the compressed image data obtained by quantizing and Huffman-coding a specific block scanning signal at the encoder. An IDCT circuit Huffman-decodes and inverse-quantizes the data read from the code memory and converts it into image data. An in-block horizontal scanning/in-block vertical scanning conversion circuit converts the image data into an in-block vertical scanning signal. An adaptive convolution filter effects the horizontal filtering of the in-block vertical scanning signal to remove the distortion of block boundary. An in-block vertical scanning/in-block horizontal scanning conversion circuit converts the image signal from which distortion has been removed into horizontal scanning direction. An adder circuit reconstructs and outputs the original image.