Research On H.264 Video Information Hiding Based On Coding Technology

With the rapid development of the Internet and video technology,people's lives and work have become more convenient.However,at the same time it has also brought a lot of security risks.Due to the easy copying and easy transmission characteristics of digital video have caused serious damage to the interests of the authors.The combination of information hiding technology and H.264 encoding provides a new direction for the solution of security problems.H.264 video information hiding technology has become a research hotspot in the field of information security.This paper focuses on the following research work for H.264 video information hiding:1)An information hiding scheme for H.264 video is proposed based on N-dimensional cubic coding.The QDCT coefficients of the I4 ? 4 macro-block are selected from coding units for information hiding,and pairing coefficients that can suppress intra-frame distortion drift are introduced.The I4 ? 4 macro-block is divided into several regions,each region's embeddable block is selected,and as many as possible pairing coefficients are selected from the embeddable blocks as coding units.After the coding unit is determined,N-dimensional cubic coding is performed to embed the secret data into the coding domain.Experiment results show that the scheme not only ensures the video quality,but also greatly increases the embedded capacity.2)An information hiding technology for H.264 video is proposed based on matrix coding,and the characteristics of the stego-video histogram are improved through preprocessing in the scheme.Matrix encoding is used to hide the information in the I4 ? 4 non-zero pairing coefficients,however,it causes distortion of the histogram distortion of the stego-video,and the secret communication is easily noticeable.In order to improve the histogram performance of stego-video,a preprocessing scheme is designed in this paper.This scheme can theoretically restrain the change of the stego-video histogram.Experimental results show that the scheme not only has better image quality,but also inhibits the bit rate growth and the change of histogram characteristics.