DCT and PCA for face recognation

Matlab下，基于DCT&DWT 的音频数字水印的简单实现，包含了水印的生成和提取过程-Audio watermark based on DCT & DWT

Discrete Cosine Transform for JPEG

该图像压缩算法参考MG.Jordon博士发布的开源代码，作者对部分内容进行了优化，包括了帧内编码、帧间编码，DCT变换编码、自适应量化等。-The image compression algorithm reference Dr. MG.Jordon released the open source code, the author of some of the contents of the optimization, including the intra coding, inter fra

视频压缩编码，视频序列：IBBIBBIBB；I帧DCT直流系数不单独处理；B帧只做前向预测。(Video compression coding)