dct和量化 之字扫描算法及编码,DCT and quantify the word scan algorithm and coding

DCT公式实现、DCT矩阵实现、AAN快速算法实现，及时间比较。-The DCT formula realize DCT matrix to achieve, AAN fast algorithm to achieve, and spend more time.

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