发明名称 |
VERFAHREN ZUR SPRACHKODIERUNG MITTELS ANALYSE DURCH SYNTHESE |
摘要 |
PCT No. PCT/FR96/00006 Sec. 371 Date Oct. 22, 1997 Sec. 102(e) Date Oct. 22, 1997 PCT Filed Jan. 3, 1996 PCT Pub. No. WO96/21220 PCT Pub. Date Jul. 11, 1996A linear prediction analysis is performed for each frame of a speech signal to determine the coefficients of a short-term synthesis filter and an open-loop analysis is performed to determine a degree of frame voicing. At least one closed-loop analysis is performed for each sub-frame to determine an excitation sequence which, when applied to the short-term synthesis filter, generates a synthetic signal representative of the speech signal. Each closed-loop analysis uses the impulse response of a filter consisting of the short-term synthesis filter and a perceptual weighting filter, by truncating the impulse response to a truncation length that is no greater than the number of samples per sub-frame and is dependent on the energy distribution of the response and the degree of voicing of the frame. |
申请公布号 |
DE69602421(D1) |
申请公布日期 |
1999.06.17 |
申请号 |
DE1996602421 |
申请日期 |
1996.01.03 |
申请人 |
MATRA NORTEL COMMUNICATIONS, QUIMPER, FR |
发明人 |
NAVARRO, WILLIAM, F-78140 VELIZY-VILLACOUBLAY, FR;MAUC, MICHEL, F-91140 VILLEBON SUR YVETTE, FR |
分类号 |
G10L11/06;G10L19/00;G10L19/08;G10L19/10;(IPC1-7):G10L9/14 |
主分类号 |
G10L11/06 |
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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