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Digital audio signal processing method

A signal processing, digital audio technology, applied in audio and video processing, embedding and reading data in digital audio coding, can solve the problems of increasing conversion operations, forced change of audio data, waste of equipment resources, etc.

Inactive Publication Date: 2018-04-03
李庆成 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, this will increase a large number of unnecessary conversion operations, on the other hand, it will inevitably cause the audio data format to be forcibly changed, which is not conducive to use and storage, and will bring unnecessary resources to related devices. waste

Method used

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Embodiment approach

[0018] As mentioned earlier, when embedding data, only "0 frame" with a scale value of "0" for the scaling factor of the frame side information is selected to perform the operation of embedding data. Therefore, when reading data, the aforementioned "0 frame" should also be selected, and other audio frames should be ignored. On this basis, one or more scale factors corresponding to a certain predetermined frequency band in the non-short window should also be selected as the read object of the embedded data. Then, read the values ​​of the predetermined embedded bits of these scale factors. Based on the aforementioned sensitivity reasons, non-short windows actually refer to: long windows, start windows, or end windows.

[0019] Corresponding to the previous selection scheme about the predetermined embedded bit in a scale factor, when reading data, it needs to correspond to the scheme used when embedding the data. A relatively optimized solution is to select only the lowest bit of ...

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Abstract

The invention provides a digital audio signal processing method, and the method comprises the specific steps: selecting frame 0 as an embedded audio frame based on an MP3 frame structure; selecting apredetermined embedded bit, and setting the predetermined embedded bit as a to-be-embedded value, wherein the scaling factor value of the frame edge information of the predetermined embedded bit is 0,and the predetermined embedded bit is located in the scaling factor of a predetermined band in a non-short window of an audio frame. The invention also provides a digital audio signal processing method, and the former frame 0 reads the value of the predetermined embedded bit of the scaling factor. The method can achieve the data embedding and reading of the former audio files or data after compression and coding.

Description

Technical field [0001] The invention relates to a digital audio signal processing method, in particular to a method for embedding and reading data in digital audio coding, and belongs to audio and video processing technology. Background technique [0002] Digital audio signal to carry information is a technology that the industry has paid wide attention to and invested considerable human and financial resources in research and development. With this technology, people can listen to music and watch TV programs normally while using devices with audio signal processing capabilities, such as mobile communication terminals, to obtain the aforementioned music or data information carried in TV programs. The applicant of the present invention has done a lot of analysis and research on embedded data in digital audio signals, and filed a Chinese patent application No. 201510447092.2. [0003] A technical solution for embedding data in uncompressed and encoded audio data is claimed in the af...

Claims

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Application Information

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IPC IPC(8): G10L19/018
CPCG10L19/018
Inventor 李庆成鹿毅忠陶玮
Owner 李庆成
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