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. 10, 2002
Filed:
Jul. 21, 1999
Kenji Komori, Kanagawa, JP;
Tetsuo Kaneko, Kanagawa, JP;
Kazushi Sato, Chiba, JP;
Satoshi Mitsuhashi, Tokyo, JP;
Masami Goseki, Tokyo, JP;
Naofumi Yanagihara, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An MPEG downdecoder which eliminates picture quality deterioration ascribable to motion compensation. A decimating inverse discrete cosine transform unit performs 4×4 decimating IDCT if the DCT mode is the field mode. If the DCT mode is the frame mode, a decimating IDCT unit for frame mode applies IDCT to the totality of the coefficients of the DCT block and separates the DCT block into two pixel blocks in order to cope with the interlaced scanning. Each of the separated pixel blocks is processed with DCT. To reference picture data, pixels are interpolated using orthogonal transform by motion compensation units to generate virtual upper-order picture data of high resolution, which is processed with motion compensation. The motion-compensated virtual upper-order picture data is orthogonal transformed to decimate pixels to generate reference picture data used for addition.