发明名称 |
Echo canceler with automatic enablement/disablement on a per-call basis |
摘要 |
Echo cancellation can be enabled to cancel echoes on an outbound transmission path based on original signals on an inbound transmission path. A controller of echo canceler enablement monitors digitized control information contained in call origination messages associated with the establishment of communications. A determination of the type of digitized information to be carried by a two-way communication channel is made. The controller causes the echo canceler to be enabled or disabled on a per-call basis based on the type of digitized information. A stand-alone echo canceler provides automatic enablement/disablement on a per-call basis based on the type of digitized information to be carried on a communication channel as determined by monitoring associated control messages.
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申请公布号 |
US5530724(A) |
申请公布日期 |
1996.06.25 |
申请号 |
US19940346445 |
申请日期 |
1994.11.29 |
申请人 |
AT&T CORP. |
发明人 |
ABRAMS, ROBERT J.;ATKINS, WILLIAM J.;TOMBERLIN, VICTOR E. |
分类号 |
H04B3/23;H04M3/00;(IPC1-7):H04L1/00;H04M1/00;H04M1/24;H04M9/00 |
主分类号 |
H04B3/23 |
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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