抄録
With the advent of digital video and digital broadcasting, copyright protection of video data has become an important issue. A novel method is described for digitally watermarking video data that is based on the discrete wavelet transform. The watermark is embedded in a multiresolution representation of each frame in the uncoded video by using controlled quantization. The watermark can be extracted directly from the decoded video without accessing the original video. Experimental results showed that the proposed method gives the watermarked image better quality and is robust against MPEG coding and re-coding. Also described is multiple watermarking with regard to generational copy control for video contents.
