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A Low Complexity Video Watermarking in H.264 Compressed Domain

机译:H.264压缩域中的低复杂度视频水印

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摘要

In this paper, a new blind and readable H.264 compressed domain watermarking scheme is proposed in which the embedding/extracting is performed using the syntactic elements of the compressed bit stream. As a result, it is not necessary to fully decode a compressed video stream both in the embedding and extracting processes. The method also presents an inexpensive spatiotemporal analysis that selects the appropriate submacroblocks for embedding, increasing watermark robustness while reducing its impact on visual quality. Meanwhile, the proposed method prevents bit-rate increase and restricts it within an acceptable limit by selecting appropriate quantized residuals for watermark insertion. Regarding watermarking demands such as imperceptibility, bit-rate control, and appropriate level of security, a priority matrix is defined which can be adjusted based on the application requirements. The resulted flexibility expands the usability of the proposed method.
机译:在本文中,提出了一种新的盲目可读H.264压缩域水印方案,其中使用压缩比特流的语法元素执行嵌入/提取。结果,在嵌入和提取过程中都不需要完全解码压缩的视频流。该方法还提出了一种便宜的时空分析方法,该方法可以选择合适的子宏块进行嵌入,从而提高水印的鲁棒性,同时减少对视觉质量的影响。同时,所提出的方法通过为水印插入选择适当的量化残差来防止比特率增加并将其限制在可接受的范围内。关于水印需求,例如不可感知性,比特率控制和适当的安全性,定义了优先级矩阵,可以根据应用程序要求对其进行调整。所产生的灵活性扩展了所提出方法的可用性。

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