A Video Watermarking Scheme Based on the Region Character of Motion Vectors
A Video Watermarking Scheme Based on the Region Character of Motion Vectors
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作者：
Wang Pei
H.264是一种新的视频压缩标准，具有高压缩比、高视频质量和高复杂度的特点。由于压缩比高，一些常规的水印方案不能直接用于H.264。提出了一种基于运动矢量区域特征的视频水印方案。此外，计算复杂度降低了50%。从实验结果来看，嵌入水印后，原始图像与嵌入的水印图像没有差别。峰值信噪比波动控制在±0.1以内，码率增长控制在1%以内。在运动估计中，搜索点是原始搜索点的一半。因此，该方案是一种简单、高效的水印嵌入方法。通过对四个区域的判断，可以将水印的容量提高一倍。
H.264 is a new video compression standard with high compression rate,high video quality and high complexity. Because of the high compression rate,some normal watermarking scheme cant be used in H.264 directly. In this paper,a video watermarking scheme base on the region character of motion vectors is proposed. Moreover,computational complexity is reduced by 50%. From the experimental result,after embedded the watermark,there is no difference between the original image and that of embedded watermark. The fluctuation of PSNR is controlled within ±0.1 and the increase of bit rate is controlled within 1%. In motion estimation,Search points are half of the original one. So this scheme is an easy and high efficient method to embed watermark. And the capacity of watermark can be doubled by judging four regions.