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:
Jun. 24, 2008
Filed:
Nov. 29, 2001
Kazutoshi Yasunaga, Kyoto, JP;
Toshiyuki Morii, Kawasaki, JP;
Hiroyuki Ehara, Yokohama, JP;
Kazunori Mano, Musashino, JP;
Yusuke Hiwasaki, Musashino, JP;
Kazutoshi Yasunaga, Kyoto, JP;
Toshiyuki Morii, Kawasaki, JP;
Hiroyuki Ehara, Yokohama, JP;
Kazunori Mano, Musashino, JP;
Yusuke Hiwasaki, Musashino, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
The present invention carries out pre-selection on many LPC codevectors stored in an LSF codebookusing a weighted Euclidean distortion as a measure and carries out a full-code selection on the LPC codevectors left after the pre-selection using an amount of distortion in a spectral space as a measure. This makes it possible to improve the quantization performance of the LPC parameter vector quantizer and improve the quality of synthesized speech of the speech coder/decoder.