Audio coding and decoding method

An audio codec and audio coding technology, applied in speech analysis, instruments, etc., can solve the problems of increasing data delay and affecting the quality of audio calls, etc., and achieve the effect of less network delay

Inactive Publication Date: 2019-03-01
盐城雪堰机械设备有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] Existing packet loss compensation schemes need to retransmit all lost data frames, which will inevitably increase data delay and affect the quality of audio calls

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  • Audio coding and decoding method

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Embodiment Construction

[0030] figure 1 It is a schematic flowchart of an audio encoding and decoding method provided by an embodiment of the present invention, the method includes an audio encoding step and an audio decoding step, wherein:

[0031] One, the audio coding step comprises:

[0032] Step 1. Perform uniform quantization coding on the audio data to obtain uniform quantization coding data; perform non-uniform quantization coding on the audio data to obtain non-uniform quantization coding data, wherein the code rate of the uniform quantization coding is greater than that of the non-uniform quantization code rate, and the uniform quantization coding and the non-uniform quantization coding have the same frequency domain bandwidth.

[0033] The audio data is quantized and encoded twice, and the encoded data obtained by the two times of quantization and encoding are respectively filled into the current frame and the next frame of the audio data code stream. When the decoding end finds that the...

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Abstract

Embodiments of the invention disclose an audio coding and decoding method. The method comprises: performing uniform quantization coding and non-uniform quantization coding on audio data, acquiring uniform quantized coding data and non-uniform quantized coding data; and filling the uniform quantized coding data corresponding to current frame audio data to a current frame of a audio data code stream, filling the non-uniform quantized coding data to a next frame of the audio data code stream. The audio coding and decoding method does not require a transmitting end to retransmit entire lost data frames, and has less impact on network delay.

Description

technical field [0001] The invention relates to the technical field of audio and video codecs, in particular to an audio codec method. Background technique [0002] Audio packet loss and delays often occur during audio passthrough. Due to the time-varying nature of network conditions, the delay introduced by each node and terminal processing will eventually lead to random delay and packet loss. In order to improve network audio quality, it is necessary to use a suitable packet loss compensation method to compensate for lost audio data packets. [0003] The existing packet loss compensation scheme needs to retransmit all the lost data frames, which will inevitably increase the data delay, thereby affecting the quality of the audio call. Contents of the invention [0004] The purpose of the present invention is to provide an audio codec method, aiming at reducing network delay during audio transmission. [0005] An audio encoding and decoding method, comprising an audio e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008G10L19/032
CPCG10L19/008G10L19/032
Inventor 张敏
Owner 盐城雪堰机械设备有限公司
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