Audio resampling method, device, equipment and storage medium

Abstract

The invention discloses an audio resampling method, a device, equipment and a storage medium, and the method comprises the steps: intercepting audio data at a current sampling rate, and obtaining to-be-resampled audio data comprising a first number of sampling points; performing filtering processing on each sampling point according to the target sampling rate to be resampled and a pre-stored target filtering coefficient table to obtain resampled audio data containing a second number of resampling points; wherein the target filtering coefficient contained in the target filtering coefficient table is obtained by performing interpolation processing on a reference filtering coefficient in a predetermined reference filtering coefficient table, the target table length of the target filtering coefficient is greater than the reference table length, and the reference table length of the reference filtering coefficient table is associated with a preset oversampling value and a filtering length value. Compared with the existing method, the method has the advantages that the determination time of the target filter coefficient table for resampling processing is better saved, and the overall time consumption of audio resampling processing is reduced, so that the response waiting time of an audio application with audio resampling after triggering is shortened.

Description

technical field [0001] The present invention relates to the technical field of audio processing, in particular to an audio resampling method, device, equipment and storage medium. Background technique [0002] Speex is a set of open source and free projects mainly for voice. It is currently widely used in voice projects. The resampling module in this project is a common means of sampling rate switching. It has a large number of applications in audio application products. It is an audio application product. The implementation of various functions in provides the underlying technical support. [0003] In audio applications, such as recording, playback, and voice change, etc., the conversion of the sampling rate is involved, which can be processed by the resampling module in Speex. However, when the audio data is resampled based on the existing resampling module of Speex , in the existing implementation of resampling, it is first necessary to determine the filter coefficient t...

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Problems solved by technology

[0003] In audio applications, such as recording, playback, and voice change, etc., the conversion of the sampling rate is involved, which can be processed by the resampling module in Speex. However, when the audio data is resampled based on the existing resampling module of Speex , in the existing implementation of resampling, it is first necessary to determine the filter coefficient table required for resampling processing in the filter coefficient initialization stage, but the determination of each filter coefficient in the filter coefficient table requires a large number of repeated calculations, which takes a long time, thus Increase the power consumption and resource occupation of the resampling execution carrier device, and at the same time cause the response waiting time after the audio application is triggered to become longer

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