Information Hiding Algorithm for H.264/AVC Based on Encoding Mode
Information Hiding Algorithm for H.264/AVC Based on Encoding Mode
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发表时间：
2010
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通讯作者：
Xu Da-wen
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作者：
Xu Da-wen
提出了一种基于编码方式的H.264/AVC信息隐藏方案。通过调整给定宏块的编码方式，将秘密信息嵌入到i帧、p帧和b帧中。对于具有intra 4×4编码方式的宏块，通过调制某个4×4块的编码方式嵌入秘密数据。对于p帧和b帧的其他宏块，通过修改宏块的编码方式实现信息的隐藏。调制模式后，对宏块进行优化处理，提高编码效率。该算法通过在调制过程中引入速率失真代价，较好地平衡了速率失真。同时，它对视频质量和视频码率的影响较小。该方案能够快速检测出视频中的秘密信息，满足视频实时处理的要求。实验结果也证明了这是一种非常有效的方案。
A scheme of information hiding for H.264/AVC based on encoding mode is proposed. Secret information is embedded in I-frame, P-frame and B-frame through adjustment of the encoding mode of given macroblocks. For the macroblocks provided with the encoding mode of intra 4×4, secret data is embedded by modulating the encoding mode of some 4×4 block. For other macroblocks in P-frame and B-frame, the hiding of information is implemented by modifying the encoding mode of macroblock. After the modulation of mode, an optimized processing for the macroblock is carried out to improve the coding efficiency. By introducing the rate-distortion cost during the process of mode modulating, the proposed algorithm achieves a better balance of rate-distortion. Meanwhile, it has less influence on the quality of video and the bit-rate of video. This scheme could detect the secret information rapidly, which meets the requirement of the real-time processing of video. Experimental results also demonstrate that it is an extremely effective scheme.