Voice call echo cancellation method and system, storage medium, and electronic device

Abstract

The invention discloses a voice call echo cancellation method and system, a storage medium, and an electronic device, and relates to the field of IP voice technology. The method comprises the following steps: obtaining a preset delay frame number of a user, and a position size of a memory occupied by an audio frame in audio playing and audio recording; applying for a first space for storing playing audio data in the memory, and defining a position for storing the playing audio data in the first space; when an audio playing thread needs to obtain the playing audio data, calling an audio playingfunction to store the current playing audio data at the beginning of the position for storing the playing audio data; when an audio recording thread generates audio collection data, calling an audiorecording function to obtain playing audio data of the position size of the memory occupied by an audio frame from the beginning position of the first space to serve as echo reference data; and calling an echo cancellation function to perform echo cancellation. By adoption of the voice call echo cancellation method and system, the synchronous alignment of the audio recording and playing can be ensured, and the echo recorded by the microphone can be effectively cancelled.

Description

Technical field [0001] The present invention relates to the technical field of IP voice, in particular to a method, storage medium, electronic equipment and system for eliminating voice call echo. Background technique [0002] In recent years, Voice over IP technology and its services have developed rapidly. Compared with traditional phones, voice over IP phones are favored by the market for their high network bandwidth utilization, low call costs, and flexible provision of rich value-added functions. . However, IP voice phones have also been criticized for their weaknesses such as poor voice quality. Among them, the echo problem is particularly prominent, which seriously affects the voice quality. Therefore, it has become inevitable to add echo cancellation algorithms to IP voice phone terminals. [0003] In an IP voice phone call, generally receiving the other party’s voice and transmitting it to the sound card for playback is performed in one thread, while collecting the local ...

AI Technical Summary

Problems solved by technology

However, voice-over-IP telephones are also criticized for their poor voice quality and other weaknesses. Among them, the echo problem is particularly prominent, which seriously affects the voice quality. Therefore, it is inevitable to add an echo cancellation algorithm to the voice-over-IP telephone terminal.

[0003] During an IP voice phone call, generally receiving the voice of the other party and transmitting it to the sound card for playback is carried out in one thread, while collecting the local voice and transmitting it to the other party is in another thread. When performing echo cancellation, the data in the playback thread needs to be used as a reference. However, there is a delay interval between the audio data recorded by the microphone and the audio data played by the speaker. It is very difficult to synchronize the data in the two threads. If it is not synchronized, the adaptive filter in the echo canceller will diverge, not only cannot eliminate the call echo, but also destroy the original collected sound, making it difficult to distinguish the sound transmitted to the sound card

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