Copyright authentication enhancement of digital watermarking based on intelligent human visual system scheme

Recently, According as digital technology with knowledge base society develops, illegal copy by user's vulnerability of copyright authentication becomes frequent. Therefore, it need research about user's copyright authentication method. In this paper, a watermark inserting adaptive method according to the sensitivity of human visual system (HVS) in DCT transform domain is proposed. Also, we proposed watermark techniques using adaptive voice information(VI). It effects that get in original image than method to use conventional image is less and shows robust watermark restoration ability form outside attack. Performance analysis is achieved about still image and restoration of watermark information using OFDM/QPSK still image transmission system in wireless channel environment. Analysis result, VI watermark performance that influence in original image is very small. And it could know that show high restoration performance.