Method and equipment for eliminating echoes during IP voice communication

Abstract

The invention discloses a method and equipment for eliminating echoes during IP voice communication. In the method, filtering is performed by using an LPC coefficient aliasing signal of an analog echo signal so as to conveniently filter real echo signals in the aliasing signal, so the real echo signals similar to an LPC coefficient spectrum structure can be filtered and simultaneously useful signals input by communication parties are reserved and the attenuation of the useful signals during wave filtering is avoided.

Description

technical field [0001] The invention relates to IP network communication technology, in particular to a method and equipment for eliminating echo during IP voice communication. Background technique [0002] With the rapid development of IP network technology, there are endless application layers based on IP network. Among them, IP voice communication is widely used because of its low communication cost. However, compared with the traditional telephone, due to the large delay of the IP network, usually more than 100ms, and the human ear can identify the echo greater than 50ms, therefore, echo interference often occurs in IP voice communication, reducing the Voice call quality. [0003] In order to eliminate the impact of actual echo signals on voice communication in the process of IP voice communication, various echo cancellation algorithms have been proposed in the industry. The principles are as follows: figure 1 shown. figure 1 In the process of IP voice communication, ...

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Problems solved by technology

[0007] Embodiments of the present invention provide a method and device for eliminating echo in IP voice communication, so as to solve the problem of attenuation of the voice input signal input by the communication party when filtering the echo signal in the process of IP voice communication

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