Researches on H.264/AVC Video Streaming Information Hiding Technology |
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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 |
Quotes | 2 |
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 .