Dissertation
Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication

Researches on H.264/AVC Video Streaming Information Hiding Technology

Author LiuZhengYan
Tutor YangGaoBo
School Hunan University
Course Computer Science and Technology
Keywords Information Hiding Video Watermarking H.264 Compressed Domain DCT
CLC TN919.8
Type Master's thesis
Year 2009
Downloads 186
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With the rapid development of information technology and computer networks , digital products, intellectual property protection is an urgent need to address the problem . Digital video copyright protection and covert communication , the development of multimedia technology an urgent and practical issues . Therefore , the digital video watermarking technology has been widely appreciated. Currently, more watermarking algorithm based on MPEG video coding standard H.264/AVC coding standard is the latest standard , high compression efficiency and adaptability of the network , with suitable relative lack of video watermarking . In this paper, the characteristics of the H.264/AVC coding standard encoding features tools , research H.264/AVC video directly in the compressed domain watermarking and information hiding techniques . The paper 's main work is as follows : first , a brief introduction of the H.264/AVC video coding standard analysis of the video watermark is compressed domain video watermarking applications and features of the existing literature typical video watermarking algorithm the summarized comparative analysis . The second proposed hiding algorithm based on the two-dimensional mapping relationship H.264/AVC information . The algorithm uses the structure of classic cube matrix to create a two - dimensional mapping relationship between the hidden information carrier DCT intermediate frequency coefficients . The simulation results show that , compared to the two-dimensional mapping method with the conventional one-dimensional map , can be obtained in the same carrier utilization case embedded cost less than conventional one-dimensional mapping ; algorithm with a small modification rate carrier , the PSNR value smaller features hidden information . Third , new features for H.264/AVC coding standard , H.264/AVC compressed domain video watermarking algorithm a resist collusion attack . Through the DC coefficient of the amount of change to produce the key to determine the embedding position of the watermark . Watermark is embedded by changing a non - zero quantized coefficients , each macro block is a 4 × 4 block . Simulation results show that the algorithm under the premise of ensuring the visual quality of the video , the effective resistance of collusion attack watermark embedding capacity relative to the Noorkami proposed algorithm has been greatly improved . Watermark extraction do not need to compress the stream fully decoded , and can meet the requirements of real-time blind detection .

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