Video Watermark Technology Based on DWT Domain
Jin Xiaohua · Journal of Suzhou Vocational University · 2009
Based on wavelet transform,it presented the technology of digital watermark used in the video streams.This solution designed the watermark algorithm on the encoding part of 8×8 pixel blocks in video bitstreams.After the VLC decoding and dequantization of video bitstreams,the harassed watermark was embedded on the DC share and some low-middle frequency AC shares of the DWT coefficients.Then the video bitstreams were resumed by the quantization and VLC encoding. The process of embedding and detecting watermark were discussed in detail.An analysis of the result of the method realized with MATLAB was given.