Protection of Watermark Signals and Preservation of Original Images by Turbo Encoding

터보 코드의 적용을 통한 워터마크 신호 보호 및 원 영상의 화질 보존

This paper proposes on the implementation of efficient image transmission system by generation and protection of watermark signals. For this, the image structure understanding is performed for improving the image quality and the generation of watermark signals. Then, the histogram is constructed and the watermark signals are selected from this. At this stage, by embedding of the coefficients of curve fittness into the lower 4 its of the image data pixels, image quality degradation due to the embedding of watermark signals are prevented. Finally, turbo encoding is performed to solve the problem of watermark signal losses that may occur on channels when transmitting. Especially, a new interleaving method called semi-random interleaver is proposed.