With the increasing application of advanced video coding (H.264/AVC) in the multimedia field, a great significance to research in video watermarking based on this video compression standard has been established. We propose a semifragile video watermarking algorithm, which can simultaneously implement frame attack and video tamper detection, herein. In this paper, the frame number is selected as the watermark information, and the relationship of the discrete cosine transform (DCT) nonzero coefficients is used as the authentication code. The subblocks, whose DCT nonzero coefficients are sufficiently complex, are selected to embed the watermark. The parities of these nonzero coefficients in the medium frequency are modulated to embed watermarks. The experimental results show that the visual quality of the embedded watermarked video is virtually unaffected, and the algorithm exhibits good robustness. Furthermore, the algorithm can correctly implement frame attack and video tamper detection.

中文翻译：

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基于H.264 / AVC的半脆弱视频水印算法

随着高级视频编码（H.264 / AVC）在多媒体领域的日益普及，基于此视频压缩标准的视频水印研究已具有重要意义。在此，我们提出了一种半脆弱的视频水印算法，该算法可以同时实现帧攻击和视频篡改检测。在本文中，选择帧号作为水印信息，并使用离散余弦变换（DCT）非零系数的关系作为认证码。的选择其DCT非零系数足够复杂的子块来嵌入水印。这些非零系数的中频奇偶校验被调制为嵌入水印。实验结果表明，嵌入水印视频的视觉质量几乎不受影响，算法具有很好的鲁棒性。此外，该算法可以正确实现帧攻击和视频篡改检测。