Data Hiding on H.264/AVC Compressed Video
Data Hiding on H.264/AVC Compressed Video
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DOI：
10.1007/978-3-540-74260-9_62
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发表时间：
2007-08
期刊：
影响因子：
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通讯作者：
Sung-Min Kim;Sang Beom Kim;Youpyo Hong;C. Won
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文献类型：
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作者：
Sung-Min Kim;Sang Beom Kim;Youpyo Hong;C. Won
在压缩视频流中嵌入水印比特的一个重要问题是水印后保持比特率不变。对于H.264/AVC等高效压缩方法来说，这是一个非常困难的问题，因为高度压缩的比特流中仅仅一个比特的改变就可能广泛影响视频内容。本文通过在H.264/AVC的上下文自适应可变长度编码(CAVLC)中的尾随位的符号位中嵌入水印位来解决这个问题。该算法在数据隐藏后不会产生比特率变化。此外，我们可以轻松平衡水印位的容量和视频的保真度。所提出的算法的简单性对于实时应用来说是一个额外的好处。我们的实验表明，数据隐藏后视频序列的PSNR高于43dB。
An important issue in embedding watermark bits in compressed video stream is to keep the bit-rate unchanged after the watermarking. This is a very difficult problem for high efficient compression methods such as H.264/AVC, because just one bit alteration in highly compressed bit-stream may widely affect the video content. In this paper we solve this problem by embedding watermark bit to the sign bit of theTrailing Onesin Context Adaptive Variable Length Coding (CAVLC) of H.264/AVC. The algorithm yields no bit-rate change after the data hiding. Also, we can easily balance between the capacity of the watermark bits and the fidelity of the video. The simplicity of the proposed algorithm is an added bonus for the real-time applications. Our experiments show that the PSNRs of the video sequences after the data hiding are higher than 43dB.