面向立体视频的自适应数字水印算法  

Adaptive Digital Watermarking Algorithm for Stereo Video

作　　者：朱仲杰[1] 王玉儿[1] 蒋刚毅[2] 梁丰[1] 

机构地区：[1]浙江万里学院宁波市DSP重点实验室,宁波315100 [2]宁波大学电路与系统研究所,宁波315211

出　　处：《中国图象图形学报》2007年第1期68-72,共5页Journal of Image and Graphics

基　　金：浙江省自然科学基金项目(Y105592)

摘　　要：鉴于立体视频是未来视频技术的一个重要发展方向,对其产品的知识产权进行保护需要提前解决,以避免盗版和侵权现象。为此,在前期数字水印和立体视频研究工作的基础上,通过详细分析立体视频的特点后,给出了一种面向立体视频的自适应数字水印新算法。新算法是将水印信息添加到增强层码流的视差矢量数据上,这种水印信息的嵌入不仅对基本码流没有影响,而且不会影响到基本码流重建后的视频图像质量。该水印算法采用自适应策略,使得嵌入水印后的图像质量损失达到最小。其水印的嵌入和提取操作均基于压缩域进行,无需视频码流的完全解码,而且水印的提取使用盲检法,无需视频原图像。整个算法简单、快速、高效。通过不同测试序列的仿真实验结果显示,水印的嵌入对原图像影响很小,使用自适应算法进行水印嵌入后图像的峰值信噪比下降值均小于非自适应算法。Stereo video is an important future trend in video technologies and intellectual property rights protection for stereo video should be resolved in advance to avoid piracy. In this paper, based on our previous research work on both digital watermarking and stereo video, a novel adaptive digital watermarking algorithm for stereo video is proposed after analyzing the characteristics of stereo video. The watermark is embedded into disparity vectors of enhancement-layer stream, without affecting the structure of base-layer stream. The proposed algorithm is an adaptive one, which keep the quality degradation of the overall reconstructed video images being the smallest. The whole watermarking process is mainly performed in compressed domain without the need of the fully decoding of compressed stream. And watermark detection can be blindly performed without the need of the original video sequence. As a whole, the proposed algorithm is fast, simple. Experimental results with several stereo sequences show that the embedding of watermark has little affection on image quality and the degradation of PSNR with the adaptive algorithm is smaller than that with non-adaptive algorithm.

关 键 词：立体视频水印 视差矢量 自适应算法 压缩域 盲检 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]