发明名称 |
Controlling echo during double-talk in a voice conference |
摘要 |
An echo canceller apparatus comprises a receive side attenuator coupled in a receive side signal path that is configured to couple from a conference call bridge to a caller; a convolution processor coupled to the receive side signal path at a convolution processor pick-off point; a double-talk detector coupled to the receive side signal path and to a sending side signal path that is configured to couple from the caller to the conference call bridge; and logic coupled to the receive side attenuator which when executed is responsive to a double-talk condition detected by the double-talk detector and operable to determine a level of echo canceled by the convolution processor, to determine an additional amount of attenuation to introduce, and to activate the receive side attenuator to introduce the additional attenuation. |
申请公布号 |
US8238548(B2) |
申请公布日期 |
2012.08.07 |
申请号 |
US20080028594 |
申请日期 |
2008.02.08 |
申请人 |
FRAUENTHAL JAMES C.;RAMALHO MICHAEL A.;SKRABUTENAS GARY;WILDFEUER HERBERT;CISCO TECHNOLOGY, INC. |
发明人 |
FRAUENTHAL JAMES C.;RAMALHO MICHAEL A.;SKRABUTENAS GARY;WILDFEUER HERBERT |
分类号 |
H04M9/08;H04M1/00;H04M3/42;H04M9/00 |
主分类号 |
H04M9/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|