Self-inspection method for clipping of meeting system microphone

Abstract

The invention discloses a self-inspection method for clipping of a meeting system microphone. The method comprises the following steps: step a, performing clipping judgment on voice data collected bya microphone; step b, reducing the analog gain of the microphone for clipping signals, playing a voice file again, and judging clipping condition till a non-clipping condition is judged. In the step a, voice signals A are automatically played through a loudspeaker of a meeting system, voice signals B are automatically collected through a local microphone, and whether the voice signals B are clipped is judged by comparing the maximum sound pressure level of the voice signals B and a set critical maximum sound pressure level during chipping. The method improves the accuracy of correlation computation of echo signals in reference signals and near-end signals for echo cancellation, thereby improving the echo cancellation effect and improving the audio quality during a communication process.

Description

technical field [0001] The invention belongs to the field of audio technology, in particular to audio processing technology in conference communication. Background technique [0002] With the development of VoIP technology and voice call technology, video conferencing systems / telephone voice conferencing systems are more and more widely used in various enterprises. In view of the characteristics of no time and geographical restrictions, low cost, and high communication efficiency, enterprises are increasingly favoring conference systems, and thus have higher and higher requirements for the quality of voice calls during their calls. Therefore, in order to meet the needs of enterprises for video / telephone The high requirements and high standards of the conference system, improving the audio quality during the conference, and achieving a better echo processing effect have become important goals and are also of great significance. [0003] Echo cancellation technology is a very...

AI Technical Summary

Problems solved by technology

However, when the loudspeaker of the conference system itself is relatively loud, due to the limitation of the device structure or volume, the distance between the microphone and the speaker is very small, and the microphone is close to the sound source. When the device is in a call, the sound played by the speaker collected by the local microphone may reach the maximum Acoustic input, resulting in clipping phenomenon; when the conference system is connected to a TV or other external sound reinforcement equipment, the loudspeaker loudness is high. When the device is in a call, the local microphone may collect the sound played by the speaker to reach the maximum acoustic input, resulting The clipping phenomenon leads to serious distortion of the voice data collected by the microphone, which is ultimately not conducive to the local echo cancellation effect, thus affecting the audio quality of VoIP voice calls

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