H.264 Video Authentication Based on Semi-fragile Watermarking

In the paper, we propose a system that uses H.264 video compressed and semi-fragile video watermarking to reach video recording automatically. In recent years, H.264 is a new advanced video compressed standard. It provides high compression efficiency and compress quality, compress the standard for the video compressed of new generation. Digital data is easy to be altered. One of the most important things is to prevent the data to be illegally used. We propose a system, watermark authentication code is used block sub-band index and coefficient modulation to embed in the quantized AC coefficient of I Frame. Using number of block corresponding to reach video data authentication. The experimental results show that the proposed system can detect the area of altered illegally. Additionally, results show that watermark embedding preserves the perceptual quality of the video.