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（有时也称为霍夫曼编码）。-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 cons