发明名称 |
Speech encoding method and apparatus including a codebook storing a plurality of code vectors for encoding a speech signal |
摘要 |
A speech encoding method including generating a reconstruction speech vector by using a code vector extracted from a codebook storing a plurality of code vectors for encoding a speech signal. In addition an input speech signal to be encoded is used as a target vector to generate an error vector representing the error of the reconstruction speech vector with respect to the target vector, and the error vector is passed through a perceptual weighting filter having a transfer function including the inverse characteristics of the transfer function of a filter for emphasizing the spectrum of a reconstructed speech signal. Thus a weighted error vector is generated, the codebook for a code vector that minimizes the weighted error vector is searched, and an index corresponding to the code vector found as an encoding parameter is output.
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申请公布号 |
US5926785(A) |
申请公布日期 |
1999.07.20 |
申请号 |
US19970911719 |
申请日期 |
1997.08.15 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
AKAMINE, MASAMI;AMADA, TADASHI |
分类号 |
G10L21/02;G10L19/00;G10L19/04;G10L19/08;G10L19/14;H03M7/30;(IPC1-7):G10L9/14 |
主分类号 |
G10L21/02 |
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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