zig-zag code for beginner

基于JPEG的图像压缩代码，包含DCT变换，色度量化，霍夫曼编码，zig扫描等详细过程-Based on the JPEG image compression code, including DCT, color quantization, Huffman coding, zig scanning process in detail

该程序实现了基本的H.264视频编码标准。-This is a mini-program of H.264, an efficient video coding standard. This program includes zig-zag scan, entropy coding, IDCT and implements basic functions of H.264.