Huffman于1952年提出一种编码方法，该方法完全依据字符出现概率来构造异字头的平均长度最短的码字，有时称之为最佳编码，一般就叫作Huffman编码-A Huffman coding method proposed in 1952, the occurrence probability of the method is completely based on the average length of the different characters to construct shortest prefix code word is sometimes called the optimal coding, Huffman coding generally called