Visual Robust Oblivious Watermarking Technique Using Error Correcting Code

Digital watermarking is an effective and popular technique to discourage illegal copying and distribution of copyrighted digital content. In this paper, an idea for enhancing the robustness of extracted watermarks is proposed. The digital watermarking of multimedia is viewed as a communications problem in which the watermark must be transmitted and received through a channel. The channel includes distortions resulting from attacks. Watermark can be treated as a transmitted signal, while the destruction of attackers is regarded as a noise distortion in channel. Error correcting code used in watermarking will have the feature that corrects errors of the extracted watermark automatically. The Golay code is used to detect and correct the errors of the extracted watermarks. The experimental results have demonstrated that the developed technique can survive subject to the JPEG lossy compression (up to 13.6% compression rate). As a consequence, the developed scheme has satisfied the basic requirements of watermarking such as robustness, capacity, and imperceptible.