发明名称 |
Apparatus and method for transcoding between CELP type codecs having different bandwidths |
摘要 |
The present invention overcomes problems of tandem coding method such as degradation of speech quality, increased system latency and computations. An apparatus for trans-coding between code excited linear prediction (CELP) type codecs with different bandwidths, includes: a format parameter translating unit for generating output formant parameters by translating formant parameters from input CELP format to output CELP format; a formant parameter quantizing unit for receiving the output format formant parameters and quantizing the output format formant filter coefficients; an excited parameter translating unit for generating output excitation parameters by translating excitation parameters from input CELP format to output CELP format; and an excitation quantizing unit for receiving the output format excitation parameters and quantizing the output format excitation parameters.
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申请公布号 |
US7684978(B2) |
申请公布日期 |
2010.03.23 |
申请号 |
US20030697909 |
申请日期 |
2003.10.30 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
SUNG JONGMO;PARK SANG TAICK;KIM DO YOUNG;KIM BONG TAE |
分类号 |
G10L19/12;G10L13/00;G10L19/00;G10L19/06;G10L19/14 |
主分类号 |
G10L19/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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