DPCM编码的联合信源信道译码，这是一个很重要的benchmark程序-DPCM coding joint source channel decoder, which is a very important benchmark procedures

编制一个哈夫曼编/译码器。利用哈夫曼编码进行通信可以大大提高信道利用率，缩短信息传输时间，降低传输成本。-Preparation of a Huffman encoder/decoder. Huffman coding communication can greatly improve the channel utilization, shorten the time of transmission of information, reduce the transmission cost.