Audio speed-change processing method and device

Abstract

The embodiment of the invention provides an audio speed-change processing method and device, and belongs to the technical field of the audio data processing. The audio speed-change processing method comprises the following steps: placing target data into a preset buffer area A; judging whether to-be-played audio data is stored in the preset buffer area B; if the to-be-played audio data is not stored in the preset buffer area B, collecting the data delay in the buffer area A and the buffer area B; judging whether the data delay is located in the preset interval; if the data delay is located inthe preset interval, directly placing the target data into the buffer area B from the buffer area A according to a first preset rate; if the data delay is not located in the preset interval, judging whether the data delay is less than a minimum value in the preset interval; if the data delay is less than the minimum value in the preset interval, placing the target data into the buffer area B fromthe buffer area A according to a second preset rate; if the data delay is not less than the minimum value in the preset interval, judging whether the data delay is greater than the maximum value in the preset interval; if the data delay is greater than the maximum value in the preset interval, placing the target data into the buffer area B from the buffer area A according to a third preset rate; and acquiring the to-be-played audio data stored in the buffer area B to play.

Description

technical field [0001] The present invention relates to the technical field of audio data processing, in particular to an audio variable speed processing method and device. Background technique [0002] At present, in real-time audio and video application scenarios, audio data is usually transmitted by UDP. Network fluctuations and mechanisms such as retransmission of packet loss at the transport layer will require the audio receiver to provide a certain amount of buffering to ensure the stability of audio playback. However, there are common static jitter buffer control algorithms and adaptive buffer control algorithms for buffer control. Among them, the static jitter buffer control algorithm is that the size of the buffer remains unchanged after the voice call is established. For data whose jitter exceeds the buffer size Packets will be discarded. Although the algorithm model is simple, the network jitter is large and the packet loss rate is high; or the network jitter is ...

AI Technical Summary

Problems solved by technology

And the algorithm is diverse and the model is complex

Therefore, when there is a network delay in the prior art, the voice delay cannot change correctly following the network delay.

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