Data processing: speech signal processing – linguistics – language – Speech signal processing – Psychoacoustic
Reexamination Certificate
2003-12-30
2008-12-30
Wozniak, James S (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Psychoacoustic
C704S219000, C704S220000, C704S223000, C704SE19049
Reexamination Certificate
active
07472056
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.
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Choi Jin Kyu
Kang Hong Goo
Kim Do Young
Kim Hyun Woo
Lee Ki Seung
Blakely , Sokoloff, Taylor & Zafman LLP
Electronics and Telecommunications Research Institute
Wozniak James S
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