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Audio coding and decoding methods, and audio coding and decoding devices

An audio coding and audio decoding technology, applied in the field of audio coding and decoding, can solve problems such as inconvenient marking of time, difficulty in retrieval and verification, etc., and achieve the effect of saving costs and improving efficiency

Inactive Publication Date: 2010-06-16
VIMICRO CORP +2
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Problems solved by technology

However, in the prior art, there is no solution for adding time information to audio data such as monitoring voice, which makes it impossible to conveniently mark the time when the original monitoring audio data was collected, which brings difficulties to subsequent retrieval and verification.

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  • Audio coding and decoding methods, and audio coding and decoding devices
  • Audio coding and decoding methods, and audio coding and decoding devices
  • Audio coding and decoding methods, and audio coding and decoding devices

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Embodiment Construction

[0038] In the embodiment of the present invention, it is considered that audio data is often divided into frames when compressed and encoded. In the audio compression coding standard, each frame of audio data defines a corresponding header syntax structure, which is used to transfer related information between codecs, such as coding mode, sampling frequency, number of channels, bit rate, and so on. Therefore, in the embodiment of the present invention, in order to carry the synchronized time information in the audio data without destroying the content of the audio data and facilitate the retrieval of audio data at a specific time, consider embedding the syntax of the corresponding time information in the frame header syntax, The time information is included in the compression-encoded audio data.

[0039] figure 1 It is a schematic flow diagram of the audio codec system for embedding time information in the present invention. First, the audio data is obtained through audio co...

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Abstract

The invention discloses audio coding and decoding methods, and audio coding and decoding devices. The audio coding method comprises the following steps of: acquiring audio data, and coding the acquired audio data; and according to a set embedding rule, embedding a syntax corresponding to time information into a frame head syntax of the current coding audio data frame to obtain audio coded data embedded with the time information. The audio decoding method comprises the following steps of: according to the syntax corresponding to the time information in frame head syntax of a decoded audio data frame, decoding the coded audio data to obtain the time information corresponding to the audio data frame. By using the technical scheme disclosed by the invention, the time information can be added into the audio data so that the audio data can perform time location retrieval.

Description

technical field [0001] The present invention relates to audio coding and decoding technology, in particular to an audio coding method, an audio decoding method, an audio coding device, and an audio decoding device. Background technique [0002] In monitoring applications, it is generally necessary to add time information (such as absolute time information: year, month, day, hour, minute, second, etc.) to the monitoring data for future retrieval and verification. However, in the prior art, there is no solution for adding time information to audio data such as monitoring voice, which makes it impossible to conveniently mark the time when the original monitoring audio data was collected, which brings difficulties to subsequent retrieval and verification. Contents of the invention [0003] In view of this, the present invention provides an audio encoding method and an audio decoding method on the one hand, and provides an audio encoding device and an audio decoding device on t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G06F17/30G10L19/008
Inventor 邱嵩冯宇红陈朝武李晓峰
Owner VIMICRO CORP
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