Feature value extraction and authentication method for multi-format audio perceptual hash authentication
A technology of perceptual hash and authentication method, applied in the field of feature value extraction and authentication of multi-format audio perceptual hash authentication, which can solve the problems of single authentication audio format, low authentication efficiency, and uncommon authentication algorithms, and achieve content authentication. , High authentication efficiency, and the effect of small-scale tamper detection
Inactive Publication Date: 2017-03-15
LANZHOU UNIVERSITY OF TECHNOLOGY
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[0007] The purpose of the present invention is to solve the problems of the existing audio authentication algorithm authentication audio format is single, the authentication algorithm is not universal, and the authentication efficiency is low
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[0023] specific implementation plan
[0024] The technical train of thought that realizes the object of the present invention is: at first audio signal is carried out pre-emphasis processing, and the audio signal after processing is carried out global double number complex wavelet transform (DT-CWT), obtains the real wavelet coefficient of audio signal; Then real wavelet The coefficients are subjected to secondary difference and frame division, and the sum value under the natural logarithm of the frame coefficients is calculated as the audio signal feature vector; finally, the feature vector is hashed to generate a perceptual hash sequence, and the audio content authentication is realized through hash matching.
[0025] The present invention is a feature value extraction and authentication method of multi-format audio perceptual hash authentication, the steps of which are as follows:
[0026] (1) pre-emphasizing the audio signal S;
[0027] (2) Decompose the pre-emphasized si...
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A feature extraction and authentication method for multi-format audio perceptual Hashing authentication mainly aims to solve the problems that the audio format authenticated by an existing audio authentication algorithm is single, the authentication algorithm is not universal and authentication efficiency is low. The method is based on a dual tree complex wavelet transform (DT-CWT) principle, and includes the steps that global DT-CWT is carried out on preprocessed audio signals and a real wavelet coefficient of the audio signals is extracted; second order difference and framing are carried out on the real wavelet coefficient, and the sum of frame coefficients under a natural logarithm is calculated to serve as a feature vector of the audio signals; Hashing construction is carried out on the feature vector to generate a perceptual Hashing abstract sequence, and quick authentication of audio content is achieved through Hash match.
Description
technical field [0001] The invention belongs to the field of multimedia information security, and in particular relates to a feature value extraction and authentication method of multi-format audio perceptual hash authentication based on dual tree complex wavelet transform (DT-CWT). Background technique [0002] Audio multimedia communication is an important part of multimedia communication technology, and audio information often contains some sensitive content and important information. However, the openness of wireless and network communication channels and the widespread use of multimedia professional software make it difficult to guarantee the authenticity of audio multimedia information, and it is increasingly difficult to falsify untrue information. Therefore, in order to ensure reliable communication and content security of audio multimedia information, it is necessary to verify the authenticity and integrity of audio content. [0003] Audio Perceptual Hashing (Audio...
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IPC IPC(8): G06F21/32G10L19/087G10L19/032G10L25/45
CPCG06F21/32G10L19/032G10L19/087G10L25/45
Inventor 张秋余省鹏飞黄羿博杨仲平任占伟余爽
Owner LANZHOU UNIVERSITY OF TECHNOLOGY