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:
Dec. 30, 2008
Filed:
Dec. 30, 2003
Jongmo Sung, Daejeon, KR;
Hyun Woo Kim, Seoul, KR;
DO Young Kim, Daejeon, KR;
Jin Kyu Choi, Seoul, KR;
Sung Wan Yoon, Kyungki-do, KR;
Hong Goo Kang, Seoul, KR;
Ki Seung Lee, Seoul, KR;
Dae Hee Youn, Seoul, KR;
Jongmo Sung, Daejeon, KR;
Hyun Woo Kim, Seoul, KR;
Do Young Kim, Daejeon, KR;
Jin Kyu Choi, Seoul, KR;
Sung Wan Yoon, Kyungki-do, KR;
Hong Goo Kang, Seoul, KR;
Ki Seung Lee, Seoul, KR;
Dae Hee Youn, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon-City, KR;
Abstract
A transcoder for use between speech codecs using different Code-Excited Linear Prediction (CELP) type and a method therefor are disclosed. The transcoder includes a decoding unit of an input CELP codec, a transcoding filter, a transcoding filter design unit, and an encoding unit of an output CELP codec. By substituting a post-filter and a perceptual weighting filter of a prior art with one transcoding filter, the calculation amount of the transcoder is reduced, and speech quality decoded at a receiving end is improved.