Method and device for detecting MP3 file authenticity

A technology of authenticity and file, applied in the field of communication, it can solve the problems of human ear distinction, threat of authenticity of digital audio, low accuracy rate, etc., and achieve the effect of improving the accuracy rate

Inactive Publication Date: 2013-01-30
INSPUR BEIJING ELECTRONICS INFORMATION IND
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AI Technical Summary

Problems solved by technology

Due to the continuous enhancement of tampering technology, the human ear cannot distinguish them at all, which poses a threat to the authenticity of digital audio, so it is urgent to authenticate the authenticity and integrity of digital audio files
[0004] Among the existing detection algorithm

Method used

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  • Method and device for detecting MP3 file authenticity
  • Method and device for detecting MP3 file authenticity
  • Method and device for detecting MP3 file authenticity

Examples

Experimental program
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Example Embodiment

[0029] Example:

[0030] The number of quantized MDCT coefficients of the original MP3 file approximately obeys the Laplace distribution, but after the MP3 file is double MP3 compressed, the distribution of the quantized MDCT number will change, that is, the histogram distribution of the quantized MDCT coefficients will deviate from the Laplace distribution After double compression, the Fourier transform side lobe of the histogram presents obvious fluctuations. Based on this finding, as long as the quantized MDCT coefficient histogram sequence of the MP3 file to be tested is judged by the volatility of the curve after Fourier transform, It can detect whether the MP3 file is double-compressed.

[0031] like figure 1 As shown, the present embodiment provides a kind of detection method of MP3 file authenticity, comprises the following steps:

[0032] S101: extracting the eigenvalue of the fluctuation level of the curve after the Fourier transform of the quantized MDCT coefficie...

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Abstract

The invention discloses a method and a device for detecting MP3 file authenticity. The method comprises the steps of: extracting the horizontal curve fluctuation characteristic value of an MP3 file to be detected after Fourier transform of a quantized and improved MDCT (Modified Discrete Cosine Transform) coefficient histogram sequence; and comparing the horizontal fluctuation characteristic value with a preset threshold, and if the value is larger than the preset threshold, determining that the MP3 file is subjected to dual compression. According to the method and device provided by the invention, through analyzing MP3 quantized MDCT coefficient statistic distribution, and the curve fluctuation characteristic after Fourier transform of the quantized MDCT coefficient histogram sequence is extracted, so that dual MP3 compression is effectively detected, judgment and comparison are carried out by a one-dimensional characteristic only, and the detecting accuracy is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for detecting the authenticity of MP3 files. Background technique [0002] With the rapid development of multimedia technology and its wide application, there are many digital audio formats for storing sound information on the network, such as MP3, WAV, MIDI, WMA, etc., which have different applications in practice. As one of the most popular audio formats at present, MP3 has been widely used in music downloads from the Internet and digital recorders due to its small file capacity and high sound quality. MP3 occupies the mainstream position in the music formats downloaded from the Internet, and most Digital recorders also support the MP3 format. [0003] While MP3 files are widely used, the functions of the ever-developing digital audio processing and editing software are becoming more and more powerful. These software make the editing of audio content easier and ea...

Claims

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Application Information

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IPC IPC(8): G11B20/18
Inventor 陈光新
Owner INSPUR BEIJING ELECTRONICS INFORMATION IND
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