发明名称 |
Embedded code-excited linear prediction speech coding and decoding apparatus and method |
摘要 |
Provides is an embedded code-excited linear prediction speech coding/decoding apparatus and method that can deal with the capacity change of speech transmission channel by modeling an error signal not coded at a core speech coder based on a transmission rate in a multiple pulse search mode or gain compensation mode and then transmitting it in an optimum mode. The apparatus includes a core speech coding unit for coding an input speech signal with spectral envelop and an excitation signal, a transmission rate determination unit for allocating the number of bits additionally allowed depending on a capacity of a transmission channel, and an embedded excitation signal coding unit for coding a residual excitation signal that is not coded in the core speech coding unit based on the number of additionally allowed bits using one of a multiple pulse excitation coding mode and a gain compensation mode. |
申请公布号 |
US8265929(B2) |
申请公布日期 |
2012.09.11 |
申请号 |
US20050297686 |
申请日期 |
2005.12.07 |
申请人 |
LEE MI-SUK;KIM DO-YOUNG;SUNG JONGMO;KIM HYUN-WOO;ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
LEE MI-SUK;KIM DO-YOUNG;SUNG JONGMO;KIM HYUN-WOO |
分类号 |
G10L19/02 |
主分类号 |
G10L19/02 |
代理机构 |
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地址 |
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