Digital audio watermarking method based on invariant characteristic of histogram

Abstract

The invention provides a digital audio watermarking method based on an invariant characteristic of a histogram, which is characterized by comprising non-downsampling discrete wavelet transform, frequency domain histogram extraction, digital audio watermarking embedment, and digital audio watermarking detection. The digital audio watermarking method comprises the following steps: firstly carrying out the non-downsampling wavelet transform on original audio watermarking to obtain a low-frequency area with audio information and a high-frequency area with audio information; secondly, extracting the frequency domain histograms with the invariant characteristic from the audio low-frequency area; thirdly, processing the obtained frequency domain histograms, and grouping the frequency domain histograms, wherein each group contains four bins; for each group, the watermarking embedment for each watermarking position is finished by depending on reallocation of coefficients of the adjacent four bins in each group; and finally reaching the purpose of the digital watermarking embedment by revising the coefficient relationship of the adjacent four bins in each group in the frequency domain histograms. The digital audio watermarking method can preferably resist common attacks and synchronization attacks.

Description

technical field [0001] The digital audio watermarking method based on the invariant characteristic of the histogram of the present invention relates to the fields of digital multimedia anti-counterfeiting and information security protection, and is specifically a new digital audio watermarking method capable of resisting desynchronization attacks. Background technique [0002] With the rapid development of digital media technology and the widespread use of the Internet, it is very important to protect copyright and authenticate the source and integrity. Digital watermarking (Digital Watermarking) has thus been highly valued by people, and has become a hot spot in international academic research. The so-called digital audio watermarking is to use the method of data embedding to hide a mark (watermark) with a specific meaning in the digital In audio products, it is used to prove the creator's ownership of his works, and as the basis for identification and prosecution of illega...

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to research and design a novel digital audio watermarking method based on histogram invariant characteristics, so as to solve the problem that the exhaustive search scheme has a large amount of calculation and false alarm rate. Higher weaknesses; the combination scheme of spread spectrum watermark and spread spectrum code cannot realize the blind detection of watermark information; the scheme of using the important features of original audio has the disadvantages of unstable feature point extraction and too many thresholds required, which is not conducive to practical application; synchronization code watermark The solution generally has problems such as limited watermark capacity and difficulty in resisting malicious attacks.

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