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:
Aug. 16, 2005
Filed:
Apr. 30, 2003
Keisuke Touyama, Tokyo, JP;
Shiro Suzuki, Kanagawa, JP;
Minoru Tsuji, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an encoding apparatus (), a code table group exchange judgment unit () selects a group of code tables from a plurality of groups of code tables according to the property such as tonality of a spectrum signal D, and a quantization unit () encodes quantization coefficients using a code table included in the selected group. Then, a multiplexer () multiplexes a group index Dtogether with coefficient data D. Furthermore, in case resources for an encoder is small, and sound quality may have to be somewhat degraded so as to realize practical encoding speed, a code table number change judgment unit () changes or reduces the number of code tables to be used.