| 一种基于H.264半脆弱视频水印方案 |
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| 引用本文： | 吴国桢,冯桂.一种基于H.264半脆弱视频水印方案[J].通信技术,2012,45(1):112-114,118. |
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| 作者姓名： | 吴国桢 冯桂 |
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| 作者单位： | 华侨大学信息科学与工程学院,福建厦门,360121 |
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| 基金项目： | 福建省自然科学基金计划资助项目 |
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| 摘 要： | 这里提出一种基于H.264/AVC低比特率的半脆弱视频水印认证方案。将从I帧能量块中提取的特征码,以修改一对AC系数间的关系,完成水印在I帧的嵌入。在P帧中,引入参考水印位对运动分量的选择机制,并通过对所选运动分量奇偶性的调制完成水印嵌入。同时在I帧中采用Lagrangian优化算法和在P帧中采用拉格朗日代价函数式方案,有效地降低了水印嵌入带来的码率提升。实验证明了该算法的有效性。
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| 关 键 词： | 半脆弱视频水印 H.264/AVC 拉格朗日优化算法 |
A Semi-fragile Video Watermarking Scheme based on H.264 |
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| WU Guo-zhen
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FENG Gui.A Semi-fragile Video Watermarking Scheme based on H.264[J].Communications Technology,2012,45(1):112-114,118. |
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| Authors: | WU Guo-zhen FENG Gui |
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| Affiliation: | (School of Information Science and Engineering, Univ. of Overseas Chinese Xiameng Fujian 360121, China) |
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| Abstract: | A novel low-bit rate H. 264/AVC-based video certification scheme of semi-fragile watermarking is proposed. The signature code extracted from I-frame energy block is used to modify the relationship between a pair of AC coefficients, thus to complete the watermark embedment of watermarking in the I-frame. In the P-frame, by introduction of a reference watermark bit for selection of the movement component, and through modulation on parity of the selected movement component, the watermark embedment is completed. In the paper, the adoption of Lagrangian optimization algorithm in I-frame and Lagrangian cost function-type solution in P-frame could effectively reduce the rate-raising caused by improved watermarking embedment. Experiments prove the effectiveness and feasibility of this algorithm. |
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| Keywords: | semi-fragile watermarking H 264/AVC： Lagrangian |
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