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Audio and video digital watermarking

Author: LiaoZuoMing
Tutor: ZhangMing
School: Zhejiang University
Course: Information and Communication Engineering
Keywords: Audio Digital Watermarking Video digital watermarking Wavelet Transform Statistical characteristics Image energy blocks
CLC: TP309.7
Type: Master's thesis
Year: 2008
Downloads: 195
Quote: 1
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Abstract


With the development of information and communication technology , digital information technology and digital products have been widely used in computer and network technology advances further promote the use and dissemination of digital products , at the same time , information security and copyright protection has become more to the more pressing needs of the digital watermark is in response to this demand . Digital watermark embedded data information in the raw data , to protect the integrity and attribution of ownership of digital information , but also widely used in the medical, legal evidence , notes , security and other fields . In this paper, based on the research of scholars and experts at home and abroad , improvement and innovation of the following algorithm : as quantified object wavelet parity coefficient and the difference between audio digital watermarking algorithm more resistant to attack individual coefficient to improve the the stability of the watermark embedding , while the watermark embedded noise dispersion to thereby obtain a high signal - to - noise ratio . Audio dual watermarking select different quantization strategy and quantitative parameters watermark embedding , and put forward a the dual watermark joint detection curve to characterize the performance of watermark embedding . Experimental results show that the dual watermark transparency , robust watermarking can effectively resist various signal attacks , the fragile watermark signal attack with high sensitivity , multi - purpose content authentication and copyright protection can be reached . Second generation watermarking algorithm , digital watermarking algorithm based on the characteristics of the video -based thinking and advantages of the statistical characteristics of video digital watermarking algorithm is proposed video digital watermarking algorithm based on the statistical properties of the energy eigenvalues ??. Since the image energy relationship stability in video compression algorithm uses statistical average , the algorithm can effectively resist frame attack and video compression re- encoding attacks . The experiments show that the algorithm has better robustness .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Encryption and decryption
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