发明名称 |
SPEECH CODING SYSTEM AND A METHOD OF ENCODING SPEECH |
摘要 |
A speech coding system of the code excited linear prediction (CELP) type comprises means (24,26) for filtering digitised speech samples to form perceptually weighted speech samples. Entries in a one-dimensional codebook (110) comprising frame length sequences are filtered in a perceptually weighted synthesis filter (28) to form a one-dimensional filtered codebook (38). The filtered codebook entries are compared with the perceptually weighted speech signals to obtain a codebook index which gives the minimum perceptually weighted error when the speech is resynthesised. Using a one-dimensional codebook (110) reduces the amount of computation which is required compared to using a two-dimensional codebook. |
申请公布号 |
EP0413391(A3) |
申请公布日期 |
1991.07.24 |
申请号 |
EP19900202178 |
申请日期 |
1990.08.10 |
申请人 |
PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES LIMITED;N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
MOULSLEY, TIMOTHY JAMES;ELLIOTT, PATRICK WILLIAM |
分类号 |
G10L19/00;G10L19/12;(IPC1-7):G10L9/14 |
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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