基于H.264的视频水印技术

针对H.264/AVC编码标准的新特性，提出一种基于H.264低比特率视频流的视频内容认证和版权保护方案。在H.264视频编码时，在传统差分能量水印（DEW）算法基础上，通过在水印嵌入过程中引入能量分布公式，改进了传统的差分能量水印算法，增加了嵌入的有效性和水印的稳健性；视频解码阶段提取水印，不需要原视频作参考，为盲检测。实验结果表明该方案具有较小的码率变化和视频失真，证明了该算法的有效性。

H.264-based watermarking for compressed video

Concerning the new features of the H.264/AVC video coding standard, a schema based on H.264 low bit-rate video stream was proposed. This paper improved the robustness and effectiveness of the traditional Differential Energy Watermarking (DEW) using the formula of energy distribution. The watermark extracting was carried out in the decode time and the original video was not needed during the process. The experimental results show that this schema can maintain a small change in bit-rate and keep small distortion, which means the proposed schema is effective.