Video steganalysis has become an important research direction of the information hiding.How to search for motion vector(MV)hidden traces in the compressed stream with various video formats and design an effective steganalysis algorithm are hotspots in current studying.Movement in the video can be divided into two groups:the imaging equipment movement and the movement of the subject.Due to the block-matching motion estimation in H.264,strong correlations among adjacent macroblock's MV are existed.However,MV-based information hiding will cause anomalies in the correlations between MV.This paper proposes a method of correlation measurement based on anomalous co-occurrence frequency between MV,and on this basis,combined with H.264 coding technology related to MV,designs a steganalysis algorithm for H.264 video.Experimental results demonstrate that the proposed method has the advantages of high speed,and can be used to effectively detect MV-based steganography in the H.264 video.
王丽娜, 王旻杰, 翟黎明, 任延珍. 基于相关性异常的H.264/AVC视频运动矢量隐写分析算法[J]. 电子学报, 2014, 42(8): 1457-1464.
WANG Li-na, WANG Min-jie, ZHAI Li-ming, REN Yan-zhen. H.264/AVC Video Steganalysis Algorithm Based on Motion Vector Abnormal Correlation. Chinese Journal of Electronics, 2014, 42(8): 1457-1464.
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