Method for reducing influence caused by echo to subjective perception in VoIP communication
A technology of subjective feeling and communication mode, applied in the direction of telephone communication, two-way sound reinforcement telephone system, interconnection device, etc., it can solve the problem of complicated external lines, the echo canceler of the access equipment cannot converge well, and the echo path is nonlinear. And other issues
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[0026] First, let me introduce that there are currently many communication methods in the industry that can be used to exchange information between access devices, such as RTCP-APP packets, and RTP extension headers. The embodiment of the present invention adopts the RTCP-APP package to introduce, and expands the RTCP-APP package to an in-band communication mode, which is used for exchanging parameters related to media streams and control messages between access devices. Refer to attached Figure 4 It can be seen that the extended RTCP-APP packet consists of two parts: media stream parameters and control messages. The parameters of the media flow include the gain from the IP side to the TDM side, the gain from the TDM side to the IP side, ERL, and Acom. Control messages are divided into request, response, and empty; the function of the request message is to request the peer to adjust parameters, including reducing the packaging interval of media packets, reducing the jitter b...
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