TURBO Codes in Digital Watermark Robust Algorithm Application
TURBO码在数字水印鲁棒算法中的应用

The low signal-to-noise ratio Turbo codes have the outstanding error correction performance, and already became the correspondence research front. A typical digital watermark system by theory may be equivalent to a communications system. In view of inserts the large capacity watermark difficulty major problem in the image, proposed applies the Turbo codes in the digital watermark system, uses for to enhance the watermark system robustness, uses the flag bit information in the algorithm the enhancement way, withdraws the secret information; uses the Turbo codes deco- ding method, restores the primitive watermark. The experimental result indicated that, specially under the Gauss noise influence, after the improvement plan obviously surpasses the original plan.