一种基于CABAC的HEVC信息隐藏算法  

AN INFORMATION HIDING METHOD FOR HEVC BASED ON CABAC

作　　者：王子晔 封化民[1,2] 刘飚[2] 黄啸晨 鱼海洋 葛鸽 Wang Ziye;Feng Huamin;Liu Biao;Huang Xiaochen;Yu Haiyang;Ge Ge(School of Telecommunications Engineering,Xidian University,Xi’an 710071,Shaanxi,China;Beijing Electronic Science&Technology Institute,Beijing 100070,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]北京电子科技学院,北京100070

出　　处：《计算机应用与软件》2021年第2期119-125,共7页Computer Applications and Software

基　　金：国家重点研发计划项目(2018YFB0803600)。

摘　　要：针对现有基于HEVC视频信息隐藏算法中存在的嵌入容量和嵌入效率较低的问题,提出一种基于CABAC的HEVC信息隐藏算法。通过分析熵编码过程中指数哥伦布编码后缀与语法元素值的相关性,阐述使用指数哥伦布编码后缀作为信息嵌入载体的可行性,并选择语法元素abs_mvd_minus2经过一阶指数哥伦布编码产生的后缀作为嵌入载体,结合矩阵编码修改后缀值完成秘密信息的嵌入。实验结果表明,该算法对信息嵌入后重建视频图像的主客观质量基本没有影响,在减少载体修改量的同时,得到了较大的嵌入容量和较高的嵌入效率。Aiming at the problem that the existing information hiding algorithm for HEVC has low embedding efficiency and embedding capacity,an information hiding algorithm for HEVC based on CABAC is proposed.By analyzing the correlation between the suffix of the exponential Golomb code and the value of the syntax element during the process of the entropy encoding,the feasibility of making the suffix of the exponential Golomb code as an information embedded carrier was explained.Then,the suffix generated by the 1st-order exponential Golomb code of the syntax element abs_mvd_minus2 was selected as the embedded carrier.Finally,the suffix value was modified by the matrix coding to complete the embedding process of the secret information.The experimental results show that the algorithm has no effect on the subjective and objective quality of the reconstructed video images after information embedding in general.It also reduces the carrier modification and greatly improves the embedding capacity and the embedding efficiency.

关 键 词：HEVC 信息隐藏 CABAC 指数哥伦布编码 嵌入容量 嵌入效率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]