Research And Implementation Of Information Hiding Technology In Video Transmission

Information hiding technology has been widely used in commercial,living and military fields,and video information hiding technology has also been quite mature.The hidden information from simple video clips recorded in the past to the current concealment of information in dynamic video transmission not only increases the number of embedded information but also increases the undetectability of the hidden information.In this paper,by analyzing the H.263 video coding protocol and VLC(variable-length coding)data in the post-encoding AC coefficient matrix,we design the hidden information of the distribution law of VLC variable-length codes in the code watershed.The video hiding algorithm is based on H.263 protocol real-time video information hiding transmission system to achieve the algorithm.The specific work is as follows:First,having learned some related concepts and hierarchical structure of H.263 protocol and having acquainted with the basic principle of H.263 video compression,including codec process and code stream process.The video information hiding algorithm based on H.263 variable-length code used in this paper is designed according to the structure of the code stream.Second,having made an analysis of the needs and design about the video information hiding function.Including the analysis of the video call software and the analysis of the needs of the hidden information embedding and extraction functions.The focus is on the design of the embedding and extraction functions.Finally,Completed the realization of the video information hiding function.The first is to implement the interface for information interaction,and then implement the function of data matching,embedding,and extraction of hidden information,and finally realize a complete real-time video information hiding function.The tested functions are tested.Which results show that the video information hiding algorithm based on H.263 variable-length code proposed in this paper has lower computational complexity and uses more features such as larger and more redundant video data.Information embedding in a macroblock not only has a large capacity for information embedding,but also effectively avoids the damage caused by non-linear quantization on hidden information,improves the security of information,and ensures the integrity of the hidden information extraction.