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:
Mar. 25, 2003
Filed:
Jul. 21, 1999
Kazushi Sato, Chiba, JP;
Kenji Komori, Kanagawa, JP;
Tetsuo Kaneko, Kanagawa, JP;
Satoshi Mitsuhashi, Tokyo, JP;
Masami Goseki, Tokyo, JP;
Takao Terao, Kanagawa, JP;
Naofumi Yanagihara, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An MPEG downdecoder is to be provided which eliminates dephasing of pixels during motion compensation to prevent deterioration of the picture quality ascribable to motion compensation. MPEG data of a high resolution picture are processed by decimating IDCT devices with 4×4 decimating IDCT to decode data of standard resolution picture data. In the case of the field motion prediction mode, a motion compensation device interpolates respective pixels of a macro-block of reference picture data stored in a frame memory to generate a macro-block constituted by pixels of ¼ pixel precision. In the case of the frame motion prediction mode, a motion compensation device interpolates respective pixels of macro-block of reference picture data stored in the frame memory to generate a macro-block constituted by pixels of ¼ pixel precision.