发明名称 |
Speech encoding and decoding apparatus |
摘要 |
A speech encoding apparatus capable of averting the deterioration of synthesis speech quality in encoding the input speech and of generating a high-quality synthesis output speech through small quantities of computation. The apparatus comprises: a target speech generation part (28) for generating from the input speech a target speech vector of a vector length corresponding to a delay parameter; an adaptive codebook (30) for generating from previously generated excitation signals an adaptive vector of the vector length corresponding to the delay parameter; an adaptive code search part (31) for evaluating the distortion of a synthesis vector obtained from the adaptive vector with respect to the target speech vector so as to search for the adaptive vector conducive to the least distortion; and a frame code generation part (32) for generating an excitation signal of a frame length from the adaptive vector conducive to the least distortion. |
申请公布号 |
EP0810585(A3) |
申请公布日期 |
1998.11.11 |
申请号 |
EP19970101441 |
申请日期 |
1997.01.30 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YAMAURA, TADASHI;TASAKI, HIROHISA;TAKAHASI, SHINYA |
分类号 |
G10L19/00;G10L19/04;G10L19/08;G10L19/12;H03M7/30 |
主分类号 |
G10L19/00 |
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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