ldpc码在数字水印方面的研究，可加强对ldpc码的理解-the research about ldpc applied digital watermark,it can decrease ber and improve robutness

【谷速软件】matlab调试-LDPC编码译码方法研究及误码率实现 可以作为参考使用-[Valley] matlab software debugging-LDPC speed coding and decoding method can achieve BER research and use as a reference