Cancellation system and method for echo in VoIP communication

Abstract

The invention provides a cancellation system for an echo in VoIP communication. The cancellation system comprises a data synchronization unit, a microphone and an echo cancellation unit, wherein the data synchronization unit is used for synchronously storing played audio data to a first sound channel cache region when a sound card plays the audio data; the microphone is used for collecting environmental sound data and storing the environmental sound data to a second sound channel cache region, and the environmental sound data include near-end voice input data and play data from a loudspeaker; the echo cancellation unit is used for making the audio data stored in the first sound channel cache region serve as the estimated echo and performing echo cancellation on the data stored in the second sound channel cache region. The invention further provides a corresponding method. According to the cancellation system and method for the echo in the VoIP communication, a good echo cancellation effect can be achieved by synchronously caching the audio data played by the loudspeaker and using the cached audio data as the estimated echo for echo cancellation.

Description

Technical field [0001] The invention relates to the field of Internet of Things communication, and more specifically, to an echo cancellation system and method in VoIP communication. Background technique [0002] With the development of the Internet of Things, VoIP (Voice over IP) technology has become a widely used technology in the Internet of Things voice communication business by virtue of its advantages of high network bandwidth utilization and low call costs. Speakers and microphones are generally used when the calling party and the called party are in a VoIP call. It is often easy for the analog sound signal played by the speaker to be received by the microphone, so that an echo occurs when the sound signal is transmitted to the source. In addition, in network calls, the delay of the call is relatively long, which makes the echo situation more serious and seriously affects the quality of the call. [0003] In the current echo resolution solution, the correlation between the...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new echo cancellation system and method in VoIP communication for the above-mentioned problem of poor echo cancellation effect of embedded equipment in VoIP communication

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