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. 17, 2008
Filed:
Dec. 28, 2000
High-speed search method for lsp quantizer using split vq and fixed codebook of g.729 speech encoder
Sang Won Kang, Kyung Ki-do, KR;
Chang Yong Son, Seoul, KR;
Won IL Lee, Kyung Ki-do, KR;
Yoo NA Sung, Seoul, KR;
Min Kyu Shim, Seoul, KR;
Seong Hoon Hong, Seoul, KR;
Sang Won Kang, Kyung Ki-do, KR;
Chang Yong Son, Seoul, KR;
Won Il Lee, Kyung Ki-do, KR;
Yoo Na Sung, Seoul, KR;
Min Kyu Shim, Seoul, KR;
Seong Hoon Hong, Seoul, KR;
C & S Technology Co., Ltd., Seoul, KR;
Abstract
A high-speed search method in a speech encoder using an order character of LSP (Line Spectrum Pair) parameters in an LSP parameter quantizer using SVQ (Split Vector Quantization) used in a low-speed transmission speech encoder, includes the steps of rearranging a codebook according to an element value of a reference row for determining a range of code vectors to be searched; and determining a search range by using an order character between a given target vector and an arranged code vector to obtain an optimal code vector. The method gives effects of reducing computational complexity required to search the codebook without signal distortion in quantizing the LSP parameters of the speech encoder using SVQ, and reducing computational complexity without loss of tone quality in G.729 fixed codebook search by performing candidate selection and search on the basis of the correlation value size of the pulse position index.