发明名称 |
VERFAHREN UND VORRICHTUNG ZUR UNTERDRÜCKUNG VON ECHOS |
摘要 |
In methods and apparatus for suppressing echo of a far end signal (114) encoded using LPC-based compression in a near end signal (112) encoded using LPC-based compression, parameters of each frame of the near end encoded signal (112) are processed without synthesizing a speech signal from the near end encoded signal (112) to determine whether sufficient echo to merit echo suppression is present in the frame. Upon determining that insufficient echo to merit echo suppression is present in the frame, the parameters of the frame are passed unmodified. Upon determining that sufficient echo to merit echo suppression is present in said frame, the parameters of the frame are modified without synthesizing a speech signal to suppress echo in the frame. The methods and apparatus are particularly suitable in codec bypass applications. |
申请公布号 |
DE69738501(T2) |
申请公布日期 |
2009.01.29 |
申请号 |
DE1997638501T |
申请日期 |
1997.10.15 |
申请人 |
NORTEL NETWORKS LTD. |
发明人 |
RABIPOUR, RAFI;HO, DOMINIC;FOODEEI, MAJID;SAIKALY, MADELEINE |
分类号 |
H04B3/20;G10L21/02;H04B7/015 |
主分类号 |
H04B3/20 |
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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