中文说明：算术运算符和哈夫曼代码时使用中图像 compression.now 天的速度传输数据是非常关键的.so，使其更快我们到 comprees 需要的数据，使数据包的大小更小和变得更快的数据传输速率
English Description：
arithmetic and huffman code for using in image compression.now day the speed when transfer the data was very crucial .so in order to make it faster we need to comprees the data in order to make the packet size more smaller and the transfer rate for the data become more faster