基于二维映射关系的视频信息隐藏算法

提出一种新的基于H.264/AVC压缩域的视频信息隐藏算法。该算法利用魔方矩阵建立待隐藏的信息与载体DCT系数之间的二维映射关系，并提出嵌入代价和载体利用率等相关概念来验证此二维映射关系的有效性，从而在载体利用率相同的情况下能够获得比常规一维映射更低的嵌入代价。实验结果表明，该方法具有实用性强、对视频质量影响小等特点。

Video Information Hiding Algorithm Based on Two-dimensional Mapping Relationship

A novel information hiding algorithm for H.264/AVC is proposed. This algorithm establishes a relationship between hidden messages and the carriers of middle frequency DCT coefficients by applying the classic magic matrix. At the same time, two concepts of the utilization rate of carrier and embedding cost are proposed in order to authenticate the validity of this relationship. Compared with the conventional one-dimensional mapping method, the proposed method based on two-dimensional mapping can obtain lower embedding cost when the utilization rate of carrier is the same. Meanwhile, the proposed method not only has minor ratio of modification, but also preserves the visual quality of the video.