公开(公告)号：US5530724A

公开(公告)日：1996-06-25

申请号：US346445

申请日：1994-11-29

申请人： Robert J. Abrams ,  William J. Atkins ,  Victor E. Tomberlin

发明人： Robert J. Abrams ,  William J. Atkins ,  Victor E. Tomberlin

IPC分类号： H04B3/23 ,  H04M3/00 ,  H04L1/00 ,  H04M1/00 ,  H04M1/24 ,  H04M9/00

CPC分类号： H04M3/002 ,  H04B3/23

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.

摘要翻译： 可以根据入站传输路径上的原始信号，启用回波消除以消除出站传输路径上的回波。 回波消除器启动控制器监视包含在与通信建立相关联的呼叫发起消息中的数字化控制信息。 进行由双向通信信道携带的数字化信息的类型的确定。 基于数字化信息的类型，控制器使得回呼消除器在每个呼叫基础上被启用或禁用。 独立的回波消除器基于通过监视相关联的控制消息确定的在通信信道上承载的数字化信息的类型，在每个呼叫基础上提供自动启用/禁用。