Method and device for audio variable speed processing
A processing method and technology of a processing device, which are applied in the directions of image communication, selective content distribution, electrical components, etc., can solve the problems of delay variation of speech, complex algorithms and various models, and achieve the effect of rapid adjustment.
Active Publication Date: 2021-07-13
BEIJING CENTURY TAL EDUCATION TECH CO LTD
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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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[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary sk...
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An audio variable speed processing method and device provided by the embodiments of the present invention belong to the technical field of audio data processing. The audio speed change processing method includes putting the target data into a preset buffer A; judging whether audio data to be played is stored in the preset buffer B; if not, collecting the data delay between buffer B and buffer A; judging the data delay Whether it is within the preset interval; if so, put the target data directly from buffer A into buffer B according to the first preset rate; if not, judge whether the data delay is less than the minimum value in the preset interval; if so, put the target data Put the buffer A into the buffer B according to the second preset rate; if not, judge whether the data delay is greater than the maximum value in the preset interval; if so, put the target data from the buffer A into the buffer according to the third preset rate Area B: acquire the audio data to be played stored in buffer B and play it.
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 ...
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IPC IPC(8): H04N21/433H04N21/439
CPCH04N21/4331H04N21/4392H04N21/4394H04N21/4398
Inventor 张光
Owner BEIJING CENTURY TAL EDUCATION TECH CO LTD