Huffman编码1． 给出信源符号的一阶概率分布，并计算信源符号熵和单字符Huffman码表。2． 计算每信源的平均字长，并与信源符号熵比较。3． 比较压缩效果。-Huffman coding 1. Source symbols are given first-order probability distribution, and calculate the entropy source and single-character symbols Huffman code table. 2. C