摘要： 提出一种应用于版权保护的压缩域视频水印算法。结合mpeg-2视频压缩过程，通过在特定位置插入不同游程的方法，实现游程编码过程的水印嵌入，在接收端可以直接从码流中提取水印，也可在游程解码过程中提取水印。实验结果表明，该算法计算复杂度低，实时性与现有视频处理设备兼容性好，且对视频质量影响小，具有良好的码率保持特性和抗再压缩能力。

关键词: 版权保护, 压缩域, 视频水印, mpeg-2标准, 游程编码, 码流

Abstract: This paper proposes a compressed domain video watermark algorithm for copyright protection. Combined with mpeg-2 video compression process, the watermark is embed in by Run-length Encoding(RLE) embedding different run-length codes in particular position, and in the receiver, it can be extracted directly from stream, and can be extracted when decoding run-length code. The algorithm has characteristics of low complexity and good real-time, and can be used in existing video processing equipment. Experimental results show that the proposed algorithm has only a few impacts on the quality of the video, and it has the rate maintenance and the anti- compression ability.

Key words: copyright protection, compressed domain, video watermark, mpeg-2 standard, Run-length Encoding(RLE), code stream

中图分类号: 

• TP309