改程序包括了四种数字水印的隐写分析。四种方法都还不错。-Reform program, including four digital watermarking steganalysis. Four methods are pretty good.

音频水印算法实现，其中包括水印的嵌入，音频水印常用攻击，以及检测算法的实现。-Audio watermarking algorithms, including the watermark embedding, audio watermarking common attacks, and the detection algorithm.

echo waterwarking audio in matlab