发明名称 |
VERFAHREN UND VORRICHTUNG ZUR RAUSCHUNTERDRÜCKUNG EINES DIGITALEN SPRACHSIGNALS |
摘要 |
<p>The invention concerns a method for suppressing noise in a digital speech signal processed by successive frames which consists in: computing the signal spectral components (Sn,f, Sn,i) on each frame; computing the maximised estimations (B'?n,i?) of spectral components of the noise included in the speech signal; carrying out a harmonic analysis of the signal to estimate a pitch; carrying out a spectral subtraction comprising at least a step consisting in subtracting respectively, from each spectral component of the speech signal on the frame (Sn,f), a quantity depending on parameters including the maximised estimation of the noise corresponding spectral component and the estimated pitch; and applying to the subtraction result a transform towards the time domain to construct an enhanced speech signal (s<3>).</p> |
申请公布号 |
DE69804329(D1) |
申请公布日期 |
2002.04.25 |
申请号 |
DE1998604329 |
申请日期 |
1998.09.16 |
申请人 |
MATRA NORTEL COMMUNICATIONS, QUIMPER;EADS DEFENCE AND SECURITY NETWORKS, MONTIGNY LE BRETONNEUX |
发明人 |
LOCKWOOD, PHILIP;LUBIARZ, STEPHANE |
分类号 |
G10L15/20;G10L15/02;G10L21/02;G10L21/0208;G10L21/0232;G10L21/0264;G10L25/90;H04B3/20;(IPC1-7):G10L21/02 |
主分类号 |
G10L15/20 |
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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