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:
Apr. 15, 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 pixel dephasing with the field DCT mode and the frame DCT mode without detracting from picture characteristics proper to interlaced pictures. To this end, a decimating IDCT unit effectuates 4×4 decimating IDCT if the DCT mode is the field mode. If the DCT mode is a frame mode, a decimating IDCT unit effectuates IDCT on the totality of coefficients of a DCT block to separate the coefficients into two pixel blocks associated with interlaced scanning. The decimating IDCT unit executes DCT on the separated two pixel blocks. The low-frequency components of the two pixel blocks are processed with IDCT and the two pixel blocks are synthesized.