Abstract: Aiming at new features of the H.264/AVC video coding standard, a bi-watermark algorithm for H.264/AVC low bit-rate video stream is proposed. By embedding the robust watermark into DCT domain and fragile watermark into prediction error motion vectors respectively, the method can jointly achieve both copyright protection and authentication. Experimental results demonstrate that the video watermark scheme can achieve high robustness and good visual quality without increasing the overall bit-rate. The robust watermark can robustly survive some attacks such as Gaussian-noise, low-pass filter, re-encoder and rotation and so on, and the fragile watermark is sensitive to various attacks.

Key words: robust watermark, fragile watermark, H.264 standard

摘要： 针对H.264/AVC编码标准的新特性，提出一种基于H.264/AVC低比特率视频流的双水印算法，将鲁棒水印嵌入DCT域中，把脆弱水印嵌入运动矢量残差中，达到对视频版权保护和视频内容完整性认证的双重目的。实验结果表明，该算法对视频质量和码率的影响较小，鲁棒水印能有效抵抗高斯噪声、低通滤波、重编码以及轻微的抖动失真等常见的视频攻击，脆弱水印对视频内容的轻微修改具有较强的敏感性。

关键词: 鲁棒水印, 脆弱水印, H.264标准

CLC Number: 

• TP309