这是一篇关于turbo码的原始论文，Near optimum error correcting cod ing and decoding turbo codes，可供学习参考之用。-This is a turbo code of the original papers, Near optimum error correcting cod ing and decod ing turbo codes, and they can study reference.

这是一个有关Turbo码编译码的程序，译码采用的是MAP译码方法，挺好！-This is a Turbo codes in the process of decoding the MAP decoding methods, very good!

In this paper we propose a watermarking system that uses the biorthogonal discrete wavelet transform, DWT and the message is encoded before embedding. The proposed watermarking method is very simple, implying four steps: turbo coding of