这个文档主要讲了基于ETS300-706的图文标准及实现方法，对于英文不是很好的人来说，先在这里看一下teletext 包的基本分类，掌握大致的框架，再去细读ETS300-706可能会更好一点。-This document mainly stresses ETS300-706 based on the graphic standards and methods, for English is not very good people, look here first in the basic t