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Audio Watermark Embedding and Extraction Based on Chaos and Wavelet Transform

A technology of wavelet transform and audio watermarking, applied in image watermarking, secure communication through chaotic signals, voice analysis, etc., can solve problems such as insufficient resistance to attacks, and achieve the effect of strengthening security and protecting copyrights

Active Publication Date: 2019-02-15
XIAN UNIV OF POSTS & TELECOMM
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Problems solved by technology

Today, a single watermark embedded in an audio copyright protection algorithm is no longer sufficient to resist attacks

Method used

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  • Audio Watermark Embedding and Extraction Based on Chaos and Wavelet Transform
  • Audio Watermark Embedding and Extraction Based on Chaos and Wavelet Transform
  • Audio Watermark Embedding and Extraction Based on Chaos and Wavelet Transform

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Embodiment Construction

[0066] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0067] An audio watermark embedding method based on chaos and wavelet transform, comprising the following steps:

[0068] Step 1, preprocessing the watermark, this step includes:

[0069] 1) Binary watermark scrambling

[0070] The Arnold transformation method of image scrambling is used to perform linear or non-linear transformation on the pixels in the watermark image matrix. The purpose is to cancel the correlation between the pixels of the watermark image and obtain the scrambled watermark image. The specific method is:

[0071] Let the image be S=[0,1]×[0,1], (x,y)∈S, let

[0072]

[0073] It is the expression of Arnold transformation. If Arnold transformation is used to scramble an image, in fact, x,y∈{0,1,2,L,N-1} of the discrete image can be set, then at this time The Arnold transform can be rewritten as

[0074]

[0075] In ...

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Abstract

The audio watermark embedding method based on chaos and wavelet transform comprises the following steps: step 1, preprocessing the watermark, 1) scrambling the binary watermark; 2) encrypting that binary watermark; 2, embeding that robust watermark and the fragile watermark into the low frequency and the high frequency of the wavelet domain respectively; The audio watermark extraction method basedon chaos and wavelet transform comprises the following steps: firstly, wavelet decomposition is carried out on the audio signal containing watermark to find out the position corresponding to the audio element whose low frequency or high frequency component is smaller than the original set threshold value, and then one-dimensional noise-like extraction operation is carried out; Secondly, the extracted noise-like image is transformed into two-dimensional image format and encrypted image. At last, that encrypt image is decrypted by chaos and inverse Arnold transform, and the embed watermark is obtained. It has the characteristics of strong concealment, high robustness and easy to detect attacks.

Description

technical field [0001] The invention belongs to the technical field of audio watermark embedding, in particular to an audio watermark embedding and extraction method based on chaos and wavelet transform. Background technique [0002] Digital watermarking refers to using the redundancy and randomness of multimedia data to embed some digital information representing special copyright into digital works without affecting the use value of the original digital works. On the other hand, it is an emerging technology that can detect and extract watermarks from digital works through extraction algorithms when needed, so as to detect the integrity of digital works and protect their copyrights. In the course of its development in the past 20 years, researchers' research on this technology has gradually matured. [0003] The first paper on image watermarking was published in 1990. After 1995, digital watermarking technology has received widespread attention and developed rapidly. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/16G06T1/00G10L19/018G10L19/02H04L9/00
CPCG06F21/16G06T1/0021G06T1/005G10L19/018G10L19/02H04L9/001
Inventor 魏雅娟刘意先任方范九伦郑茗化焦瑞芳杨磊
Owner XIAN UNIV OF POSTS & TELECOMM
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