Research On Information Hiding Technology Based On H.264/AVC Video

At present,due to the rapid development of science and technology,people's life rhythm has become faster and faster.The development of network communication has brought the entire world into an information age.Private information,commercial information,and military information are all transmitted through public network channels.While network communication is convenient for us,it also brings great security risks to information security.Therefore,the requirements for information security and confidentiality in various industries are also increasing.The emergence of information hiding technology can largely protect our private information from being intercepted by criminals during transmission.It can embed information into common carriers,such as images,audio,video and other data for dissemination.The carrier objects after embedding the information will not have a significant difference in the senses,so that it is not easy to cause the third party to perceive.In this way,the information can be transmitted to complete a covert communication.H.264 / AVC is currently the most widely used and mature high-efficiency video encoder standard.It has higher encoding efficiency,lower transmission encoding rate,strong network adaptability and fault-tolerant recovery capability.Therefore,in the current research process of video-based information hiding technology,combining it with the H.264/AVC compression standard has become the main focus of the current research on the security and confidentiality of information.The main research content of this article is to combine the key technologies and principles of the H.264/AVC video coding standard,and analyze the process and characteristics of embedding information algorithms in the transform domain,as well as the characteristics of interframe prediction coding to predict motion vectors.The information hiding on the vector has been improved.The main research work is as follows:1.A steganography algorithm based on modified H.264/AVC video motion vector is proposed.In order to expand the amount of embedded information,the method sets two thresholds M1 and M2(M1>M2).Among them,M1 is used to pick out high-speed motion vectors,and M2 is used to pick out vector components of high-speed motionvectors.After modifying the selected motion vector,it will have less impact on the video.According to the embedding algorithm,experiment with different threshold groups,analyze the experimental results,determine the two optimal thresholds,and then use these two optimal thresholds for comparative experiments.Experiments show that this embedding method can complete the embedding of information and expand the amount of embedding information.2.In order to ensure the security and confidentiality of the embedded information,before embedding the information,the information to be embedded is mapped according to a certain algorithm,each four bits of the original information to be embedded are mapped into six bits,and then through the threshold and embedding The algorithm embeds the encrypted information into the motion vector of H.264/AVC video.Experiments show that this kind of mapping encryption can improve the security and confidentiality of embedded information.