摘要： 基于运动矢量和矩阵编码的视频隐写方法存在运动矢量修改率过高的问题。为此，提出一种低修改率的视频隐写方法。按照 H.264标准进行视频编码，通过预先定义的阈值选取幅值较大的运动矢量，根据相位角选取合适的运动分量，利用该分量在运动矢量中嵌入秘密信息，使用矩阵编码降低运动矢量的修改率。实验结果表明，该方法具有较高的载体数据利用率、较低的载体数据修改率和计算复杂度。
关键词:
视频隐写,
运动矢量,
矩阵编码,
修改率
Abstract: In this paper, a video steganographic method based on motion vectors and matrix encoding is proposed to solve the problem of motion vectors modification too high. Use H.264 standard to edit video coding. A set of the motion vectors with magnitude greater than a predefined threshold are selected. And the secret messages are embed in the horizontal or vertical component of those motion vectors through the proper range of the phase angle. The matrix encoding technique is also utilized to decrease the modification rate of motion vectors. Experimental results show that this method has high supporter data utilization rate, low supporter data modification rate and computational complexity.
Key words:
video steganographic,
motion vector,
matrix encoding,
modification rate
中图分类号:
赵李懿, 杨晓元, 钮可, 郭耀. 一种低修改率的视频隐写方法[J]. 计算机工程, 2011, 37(20): 130-132.
DIAO Li-Yi, YANG Xiao-Yuan, CHOU Ge, GUO Yao. Video Steganographic Method with Low Modification Rate[J]. Computer Engineering, 2011, 37(20): 130-132.