一种基于能量差比率与扩频的双重视频水印技术

Dual Video Watermarking Technique Based on Energy Difference Ratio and Spread Spectrum

提出了一种基于能量差比率与扩频的双重视频水印技术。首先在帧内预测变换和量化阶段,通过直接置换中低频DCT系数嵌入鲁棒水印,然后以能量差比率算法嵌入半脆弱水印。此外,该算法水印提取实现了盲检测。实验结果表明,提出的双重水印不会对视频文件大小造成影响,并且对重量化、块删除、共谋攻击等都具有很强的鲁棒性。

A dual video watermarking technique based on energy difference ratio and spread spectrum was proposed. Firstly, at the intra prediction, transform and quantization stage, it embeded robust watermarking by low-mid frequency DCT coefficients of direct-permutation. Further more, semiffragile watermarking was embedded by energy-difference-ratio algorithm. And besides, watermark extraction in this algorithm enabled the blind examination. Experimental results show that the proposed method will not affect the size of video files,and also has strong robustness under attacks such as re-quantization, block-deletion and collusion.