Compressed domain video watermarking using EZW and chaos

Video watermarking is must for data security in today's developing world. It is a big challenge as it has too much of data handling and also many compression techniques that may hamper the watermark due to their compression strategies. Thus, in real situations, watermark extraction and providing video security becomes very difficult. Hence, it is essential to have a simple and elegant method of video watermarking. In this paper, we propose a blind watermarking technique in EZW compressed domain. The binary watermark is embedded in video before compression to generate the key. The processed watermarked video is encoded using 3D-DWT and compressed using EZW algorithm. The output obtained from EZW and key generated during watermark embedding is scrambled using chaotic scrambling. At receiver side, the key is used for watermark extraction. As the method uses chaotic scrambling it is also secured and provides a good amount of security over unsecured channels. The proposed method is found to be simple and robust even under compression.