A regional dct coefficients h264 based video watermarking

The present invention discloses a method of watermarking H264 video region based on the DCT coefficients, belonging to the field of multimedia information security. The present invention is a video I-frame first divided region by calculating the energy of each region, select the appropriate region of DCT coefficients of the video watermark embedding, the watermark is embedded in the dispersed plurality of macro blocks, improves the robustness of the watermark. Updating the video region using the DCT coefficient quantization step size dynamically, improve imperceptibility of the watermark. The present invention watermark is embedded in the video encoding compression, while reducing the impact of the bit rate of the video watermark embedding.