h.263的tmn算法。可以用来作编码方面的研究，虽然263编码逐渐淡出江湖，不过263+还是不错的，通过学习263，可以更好的掌握263+-h.263 tmn the algorithm. Code can be used for the study, although the 263 coding gradually fade away corners, but 263 is good, Through the study of 263, we can better grasp 263