A Method of Improving the Echo of IP Telephone

Abstract

The invention discloses a method for improving the echo of an IP telephone, which includes at least one audio channel, and each audio channel includes a recording thread, a receiving thread and a playing thread, and the recording thread uses an echo cancellation module to process the microphone sound collected each time. Audio processing, and transmit the processed audio data to the other party; the echo cancellation module includes a multi-band based echo delay determination method, a free step-based minimum mean square adaptive filtering method, a polyphase structure-based SSB Linear filter, comfort noise generator and double-ended detection algorithm; the receiving thread processes the audio data sent by the other party and sends it to the buffer, and the playing thread processes the audio data in the buffer and plays the processed audio data audio data. The beneficial effect of the invention is that by reducing the echo phenomenon in the passing process of the IP phone, the voice communication quality is improved, the practicability of the network phone can be increased, the application range of the network phone can be expanded, and the enterprise cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of digital voice processing, in particular to a method for improving IP telephone echo. Background technique [0002] IP telephony is a telephone communication technology that realizes calls through the Internet. Compared with traditional fixed-line telephones, IP telephony has many advantages such as low call cost, simple construction, and easy scalability. However, when using an IP phone to make a call, it is easily affected by the network or line, and there will be sound quality problems such as echo, which will affect the call quality. [0003] Existing methods for eliminating echoes mainly include the following: (1) Improvement of the speech environment, such as adding sound-absorbing materials to the walls, can suppress indirect acoustic echoes by reducing the reflection of speaker sound, but has little effect on direct echoes. (2) Using an echo suppressor, by comparing the received sound with the mic...

AI Technical Summary

Problems solved by technology

[0004] In addition, in the existing technical solutions, if the network environment is not good, the echo cancellation is not obvious and the original sound is greatly distorted when a single party, especially a multi-party call is made.

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