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首页> 外文会议>International Conference on Digital Rights Management: Technologies, Issues Challenges and Systems(DRMTICS 2005); 20051031-1102; Sydney(AU) >A MPEG-2 Video Watermarking Algorithm with Compensation in Bit Stream
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A MPEG-2 Video Watermarking Algorithm with Compensation in Bit Stream

机译：具有比特流补偿的MPEG-2视频水印算法

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摘要

Some requirements for MPEG-2 video watermarking, such as invisibility, robustness, unchanged bitstream size and real time processing, are desirable. We firstly apply a DC-based embedding strategy to MPEG-2 compressed domain and embed the watermark by modifying the DC coefficients. The strategy has three advantages over the AC-based one. Then a MPEG-2 bitstream video watermarking scheme is proposed. The watermark is embedded in DC coefficients in I frames. Because these DC coefficients are differentially coded, error caused by watermark embedding will be propagated. In order to decrease the distortion to video quality caused by error propagation, we develop a compensation algorithm worked in bit-stream, which improves the quality of the watermarked video effectively. We also give a simple control scheme to ensure that the MPEG-2 bitstream keeps its original size after watermarking. The experimental results show that the watermark is robust while guaranteeing the invisibility and real-time processing.
机译：希望对MPEG-2视频加水印有一些要求，例如不可见性，鲁棒性，不变的比特流大小和实时处理。我们首先将基于DC的嵌入策略应用于MPEG-2压缩域，然后通过修改DC系数来嵌入水印。与基于AC的策略相比，该策略具有三个优点。然后提出了一种MPEG-2比特流视频水印方案。水印被嵌入I帧的DC系数中。因为这些DC系数是差分编码的，所以将传播由水印嵌入引起的误差。为了减少由于错误传播而导致的视频质量失真，我们开发了一种在比特流中工作的补偿算法，可以有效提高水印视频的质量。我们还给出了一种简单的控制方案，以确保在加水印后MPEG-2比特流保持其原始大小。实验结果表明，该水印具有鲁棒性，同时又保证了其不可见性和实时性。

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