Huffman编码属于熵编码的方法之一，是根据信源符号出现概率的分布特性而进行的压缩编码.Huffman编码的主要思想是：出现概率大的符号用长的码字表示；反之，出现概率小的符号用短的码字表示。-The Huffman coding is one of the entropy coding method, according to the source symbol occurrence probability distribution of the characteristics of the compression coding, the main idea is the Huffman coding means: the probability of the symbol with a long codeword　conversely, the probability is small symbols using a short code word.