Hack Chan Lee, Chul Hoon Cho, Joong Won Song, Jae Chan Namgung

The KIPS Transactions:PartB , Vol. 8, No. 5, pp. 579-586, Oct. 2001
10.3745/KIPSTB.2001.8.5.579,   PDF Download:

Abstract

Digital watermarking is to embed imperceptible mark into image, video, audio, and text data to prevent the illegal copy of multimedia data, arbitrary modification, and also illegal sales of the copies without agreement of copyright ownership. In this paper, we study for the embedding and extraction of watermark key using wavelet in the luminance signal in order to implement the system to protect the copyright for image MPEG. First, the original image is analyzed into frequency domain by discrete wavelet transform. The RSA (Rivest, Shamir, Aldeman) public key of the coded target is RUN parameter of VLC (variable length coding). Because the high relationship among the adjacent RUN parameters effect the whole image, it prevents non-authorizer not to possess private key from behaving illegally. The Results show that the proposed method provides better moving picture and the high distortion more key of insert than direct coded method on low-frequency domain based DCT.

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