发明申请
US20050010403A1 Transcoder for speech codecs of different CELP type and method therefor
有权
用于不同CELP类型的语音编解码器的转码器及其方法
- 专利标题： Transcoder for speech codecs of different CELP type and method therefor
- 专利标题（中）： 用于不同CELP类型的语音编解码器的转码器及其方法
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申请号： US10749748申请日： 2003-12-30
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公开(公告)号： US20050010403A1公开(公告)日： 2005-01-13
- 发明人: Jongmo Sung , Hyun Kim , Do Kim , Jin Choi , Sung Yoon , Hong Kang , Ki Lee , Dae Youn
- 申请人： Jongmo Sung , Hyun Kim , Do Kim , Jin Choi , Sung Yoon , Hong Kang , Ki Lee , Dae Youn
- 优先权： KR2003-47455 20030711
- 主分类号： G10L19/12
- IPC分类号： G10L19/12 ; G10L19/14 ; G10L19/04
摘要：
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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