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提出了一种基于帧内预测模式调制的H.264视频信息隐藏算法。在模式选择过程,通过调制I帧亮度的4×4块的预测模式实现信息隐藏。通过引入嵌入/提取矩阵,使得在修改一个4×4块的预测模式时,能够嵌入3比特信息。在信息提取过程,不需要原始视频,也不需要完全解码,只需对帧内预测模式解码即可。实验结果表明,本文算法能大幅提高信息隐藏容量,且保证了视频感知质量,对比特率变化影响不大。
An H.264 video information hiding algorithm based on intra prediction mode modulation is proposed. In the mode selection process, information hiding is realized by a prediction mode of a 4 × 4 block that modulates the brightness of an I frame. By introducing an embedding / extracting matrix, 3 bits of information can be embedded when modifying a 4x4 block prediction mode. In the information extraction process, the original video is not needed, nor is it needed to be completely decoded, only the intra prediction mode can be decoded. The experimental results show that the proposed algorithm can greatly improve the information hiding capacity, and ensure the video perceived quality, little impact on the bit rate change.