The paper introduces briefly the optimum binary tree,the origination and principle of Huffman coding as well as the application situation at source coding in digital TV system.

• 简要介绍了最优二叉树,哈夫曼编码的来历,哈夫曼编码原理以及哈夫曼编码在数字电视系统信源编码中的应用情况。