Audio restoration method and device, equipment and medium

Abstract

The embodiment of the invention relates to an audio restoration method and device, equipment and a medium. The method comprises the following steps: acquiring an audio frame signal to be processed; detecting a wave cutting interval existing in the audio frame signal, wherein the wave cutting interval comprises a plurality of continuous wave cutting points, and the wave cutting points are signal points of which the amplitudes exceed a preset threshold value; judging whether the detected wave cutting interval meets a specified interpolation condition or not according to a non-wave cutting point close to the wave cutting interval; and if yes, repairing the cut wave interval by adopting a specified interpolation method based on the non-cut wave point. According to the audio repairing method provided by the embodiment of the invention, the required operand is very low, so that the repairing time can be greatly shortened, and a quick and real-time audio repairing effect can be achieved.

Description

technical field [0001] The present disclosure relates to the technical field of audio processing, and in particular to an audio restoration method, device, equipment and medium. Background technique [0002] Audio transmission is involved in scenarios such as audio and video conferences, webcasts, and online courses, but audio clipping (clamping) may occur due to various reasons such as audio equipment, recording methods, and recording occasions, resulting in audio clipping. distortion. For example, when the gain of the microphone device used by the user is high and the volume of the playback device is set too high, the size of the near-end voice signal and the far-end echo signal collected by the microphone will easily exceed the threshold and the audio waveform will be clipped. That is, the portion of the waveform that exceeds the threshold is truncated. [0003] Most of the related technologies use more complex methods for audio restoration, such as using sparse synthes...

AI Technical Summary

Problems solved by technology

[0002] Audio transmission is involved in scenarios such as audio and video conferences, webcasts, and online courses, but audio clipping (clamping) may occur due to various reasons such as audio equipment, recording methods, and recording occasions, resulting in audio clipping. distortion

For example, when the gain of the microphone device used by the user is high and the volume of the playback device is set too high, the size of the near-end voice signal and the far-end echo signal collected by the microphone will easily exceed the threshold and the audio waveform will be clipped. That is, the portion of the waveform that exceeds the threshold is truncated

[0003] Most of the related technologies use more complex methods for audio restoration, such as using sparse synthesis and sparse analysis model methods, least mean square autoregressive model methods, and minimizing high-order derivative energy methods to perform audio restoration. However, this method is very computationally intensive and takes a long time to repair, making it difficult to achieve fast and real-time audio repair effects required in scenarios such as audio and video conferences, webcasts, and online courses.

Images