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. 25, 2009
Filed:
Feb. 20, 2003
Hiroyuki Ehara, Yokohama, JP;
Kazutoshi Yasunaga, Kyoto, JP;
Kazunori Mano, Nerima-ku, JP;
Yusuke Hiwasaki, Higashiyamato, JP;
Hiroyuki Ehara, Yokohama, JP;
Kazutoshi Yasunaga, Kyoto, JP;
Kazunori Mano, Nerima-ku, JP;
Yusuke Hiwasaki, Higashiyamato, JP;
Panasonic Corporation, Osaka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
At the speech encoding end, upon generation of an fixed excitation vector, the shape of an excitation vector output from pulse excitation codebookis identified in pulse excitation vector shape identifier, a dispersion vector used for excitation vectors of the shape is output from dispersion vector storage, and, in dispersion vector convolution processor, dispersion vector convolution processing of the excitation vector is performed. In particular, when a pulse excitation vector having a specific shape of high frequency of use is output from pulse excitation codebook, pulse excitation vector shape identifiercontrols dispersion vector storagein such a way that an additional dispersion vector prepared dedicated to the pulse excitation vector is output. By this means, it is possible to provide a technology that improves the quality of decoded speech and that decodes speech more natural and audible to the user.