在电报通讯中，电文是以二进制的0、1序列传送的。字符集中的字符的使用频率是不同的（比如e和t的使用较之q和z要频繁得多），哈夫曼编码可以使得编码的总长最短，从而相同的位长可以传送更多的信息。-In telegraph communications, the message is transmitted binary sequence 0,1. Frequency character sets are different (such as e q and t and z are used with much more frequently), Huffman coding may be such that the shortest length coding, so that the same bit length information can be transmitted more .