Double compression detection method towards MP3 (moving picture experts group audio Layer-3) digital audio file

A technology of digital audio and detection methods, which is applied in electrical digital data processing, speech analysis, speech recognition and other directions, and can solve the problems of low detection accuracy.

Inactive Publication Date: 2014-10-29
WUHAN UNIV
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AI Technical Summary

Problems solved by technology

[0005] The current re-compression detection algorithm for MP3 files has a higher detection accuracy when low bit rate is recompressed to high bit r

Method used

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  • Double compression detection method towards MP3 (moving picture experts group audio Layer-3) digital audio file
  • Double compression detection method towards MP3 (moving picture experts group audio Layer-3) digital audio file
  • Double compression detection method towards MP3 (moving picture experts group audio Layer-3) digital audio file

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Embodiment Construction

[0037] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0038] First of all, the following unified explanations are given for the relevant terms appearing in this technical solution:

[0039] Compressed audio: Refers to audio that has undergone lossy compression, such as MP3 and WMA files are lossy compressed;

[0040] One-time compressed MP3: refers to the MP3 audio file encoded and compressed by the original PCM signal through the MP3 encoder;

[0041] Recompress MP3: the process of decompressing the original MP3 audio into PCM signal, and then recompressing into MP3 audio at the same bit rate or different bit ...

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Abstract

The invention discloses a double compression detection method towards an MP3 (moving picture experts group audio Layer-3) digital audio file. The double compression detection method towards the MP3 digital audio file includes: using a pattern classification technology to extract features of the MP3 digital audio file; using classifier training and double compression determination to perform double compression detection on the MP3 digital audio file; using the classifier training and source code rate determination to perform source code rate detection on the MP3 digital audio file. The double compression detection method towards the MP3 digital audio file is based on calibration, uses difference value of numbers of average frame quantization MDCT coefficients of an original audio file and a calibrated audio file, which are equal to figures from 0 to 9, as the features to perform the detection, can solve the puzzles in detection of double compression at the same bit rate and double compression at bit rate from high to low as shown in experimental results, not only can identify whether the MP3 digital audio file is compressed or not, but also can accurately determine original compression code rate of the MP3 digital audio file, and thereby provides the basis for audio tamper detection.

Description

technical field [0001] The invention belongs to the technical field of digital media processing, and relates to a detection method for identifying whether an MP3 digital audio signal has undergone heavy compression. technical background: [0002] The digitization of multimedia technology and the advancement of various transmission technologies have resulted in rapid growth of digital media applications. Among them, the widespread use of recording equipment has led to more and more recorded materials appearing in various fields such as litigation, rights protection, news reports, and business negotiations. Since the audio information can be easily modified only by using an ordinary computer, in order to ensure the authenticity of the recording, audio tampering detection technology has become a necessary step for introducing audio evidence in many cases. [0003] The current digital audio forensics technology refers to detecting the authenticity and integrity of the content c...

Claims

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Application Information

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IPC IPC(8): G10L15/10G06F17/30
Inventor 任延珍范梦迪高雄智吴兴超赵思寒
Owner WUHAN UNIV
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