发明名称 |
VOICE CODING METHOD, VOICE CODING APPARATUS, AND VOICE DECODING APPARATUS |
摘要 |
A gain unit scales a code vector Ci output from a configuration variable code book by a gain g after the positions of non-zero samples are controlled according to an index and transmission parameter p. A linear prediction synthesis filter input the multiplication result, and outputs a regenerated signal gACi. A subtracter outputs an error signal E by subtracting the regenerated signal gACi from an input signal X. A error power evaluation unit computes an error power according to an error signal E. The above described processes are performed on all code vectors Ci and gains g. The index i of the code vector Ci and the gain g with which the error power is the smallest are computed and transmitted to the decoder.
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申请公布号 |
US2003083868(A1) |
申请公布日期 |
2003.05.01 |
申请号 |
US19990386824 |
申请日期 |
1999.08.31 |
申请人 |
OTA YASUJI;SUZUKI MASANAO;TSUCHINAGA YOSHITERU |
发明人 |
OTA YASUJI;SUZUKI MASANAO;TSUCHINAGA YOSHITERU |
分类号 |
G10L19/08;G10L19/00;G10L19/04;G10L19/10;H03M7/30;H04B14/04;(IPC1-7):G10L19/10 |
主分类号 |
G10L19/08 |
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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