【摘要】 目前绝大部分无损数据隐藏方案,只能无损恢复嵌入数据,而在数据提取后,原始的视频载体无法完全恢复,本质上仍是有损隐藏算法。为了实现视频无损认证和隐蔽通信,提出基于直方图对的MPEG-4视频无损数据隐藏方法。通过直方图调整,在MPEG-4视频的帧内视频对象平面(I-VOP)的量化离散余弦变换(DCT)系数中隐藏数据。同时,在提取过程中不需要原视频的参与,获得嵌入数据并且完全恢复原始视频。理论分析与实验结果表明,该方法失真程度小,隐蔽性高,适用性大。更多还原

【Abstract】 In the most existing lossless data hiding schemes,hidden data can be extracted out without any distortion while the payload videos are lossy.So,they are not lossless in essence.In order to implement lossless video authentication and hidden communication,a lossless data hiding scheme of histogram pair was proposed for MPEG-4 videos.It embedded hidden data into the quantized Discrete Cosine Transform(DCT) coefficients of Intra Video Object Plane(I-VOP) by adjusting the histograms.In the process of data extracting,it can get embedded data blindly and reconstruct original videos without any distortion.Theory analysis and experimental results demonstrate that the proposed scheme has low distortion,high invisibility and wide availability.更多还原