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Audio coding method, decoding method, device and audio coding and decoding system

A technology of audio coding and coding method, applied in the audio field, can solve problems such as large delay, and achieve the effect of reducing delay

Active Publication Date: 2022-04-15
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] In order to solve the problem that after the compressed data packet is lost, the receiving end needs to wait for the arrival of the redundant data packet before recovering and decoding, resulting in a relatively large time delay. Embodiments of the present invention provide an audio encoding method, decoding method, and device and audio codec system

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  • Audio coding method, decoding method, device and audio coding and decoding system
  • Audio coding method, decoding method, device and audio coding and decoding system

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Embodiment Construction

[0100] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0101] In order to facilitate the understanding of the various embodiments of the present invention, at first the relevant terms are explained:

[0102] Audio source data: Uncompressed digital audio data obtained by sampling, quantizing, and encoding conversion of the analog signal corresponding to the sound signal. The audio source data may be Pulse Code Modulation (English: Pulse Code Modulation, PCM for short) data.

[0103] Sampling rate: The number of samples extracted from a continuous analog signal and composed of a discrete signal per second.

[0104] Compression ratio: The ratio of the file size after audio data encoding compression to the file size before compression.

[0105] figure 1 It is a schematic diagram of an imple...

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Abstract

The invention discloses an audio encoding method, a decoding method, a device and an audio encoding and decoding system, belonging to the technical field of audio. The method includes: acquiring the i-th audio frame in n consecutive audio frames, encoding the i-th audio frame to obtain the i-th encoded data, and buffering the i-th encoded data to obtain the i-th redundant data, i is a positive integer, n is a positive integer, 1≤i≤n; the i-th coded data and at most m redundant data before the i-th redundant data are packed as the i-th audio data packets, where m is a preset positive integer. The invention reduces the time delay caused when audio data packets are lost.

Description

technical field [0001] The embodiments of the present application relate to the field of audio technology, and in particular, to an audio encoding method, decoding method, device, and audio encoding and decoding system. Background technique [0002] In order to reduce the data volume of audio data during transmission, the sending end encodes and compresses the audio source data to obtain compressed data, sends the compressed data to the receiving end, and the receiving end decodes the received compressed data to obtain audio source data. [0003] The audio source data is composed of continuous audio frames, and the audio frames are 20ms or 40ms audio data, and the audio frames are coded and compressed sequentially to obtain compressed data packets. In the case of a poor network, some data packets may be lost during the transmission of compressed data packets, and some audio frames in the audio data received by the receiving end will be lost, resulting in discontinuous or stu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/005G10L19/18
CPCG10L19/005G10L19/18G10L19/22H04L43/0829
Inventor 王兴鹤
Owner HANGZHOU HIKVISION DIGITAL TECH
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