基于熵编码的立体视频加密与信息隐藏算法  

A Steganography Algorithm in Encrypted Stereoscopic Video Based on Entropy Coding

作　　者：高巍[1,2] 蒋刚毅[1] 郁梅[1] 骆挺[1,2] GAO Wei;JIANG Gangyi;YU Mei;LUO Ting(Faculty of Information Sciences and Engineering,Ningbo University,Ningbo 315211,China;College of Science and Technology,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]宁波大学科学技术学院,宁波315211

出　　处：《电子与信息学报》2020年第9期2158-2165,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61671258,61871247,61931022,61971247)。

摘　　要：针对立体视频的安全性,该文提出一种基于熵编码的立体视频加密与信息隐藏算法。首先,结合立体视频编码结构,分析误差漂移的物理机制,并根据立体视觉掩蔽效应,确定左右视点的加密帧和隐秘信息待嵌入帧。其次,在基于上下文自适应二进制算术编码(CABAC)的熵编码中,通过等长码字替换技术,实现立体视频的加密和信息隐藏。实验结果表明,视频码流经加密与信息隐藏之后格式兼容、比特率不变,视频感知质量无明显下降,在计算复杂度和码率增加率上有显著优势。For security of stereoscopic video,a video encryption and information hiding algorithm based on entropy coding is proposed.Firstly,with the analysis of Multi-view Video Coding(MVC),the physical mechanism of error drift is investigated.By applying the stereoscopic masking effect,the frames to be encrypted and the frames to be embedded are determined.Secondly,by using a Context-based Adaptive Binary Arithmetic Coding(CABAC)bin-string substitution technique,the encryption and data hiding of stereoscopic video are implemented.Experimental implementation reveals that the video stream has the format compatibility and the bit-rate remains unchanged after encryption and data hiding.The video quality degradation is negligible.The algorithm has significant advantages in computational complexity and rate increase.

关 键 词：立体视频编码 分层次B帧预测 隐秘域信息隐藏 熵编码 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]