详细论述了场逆程图文电视系统的实现，并提出了图文电视的发展方向。

The Teletext Television System in CATV Net Li Jin\ Huang RuiguangIn this paper, teletext system on vitical interval of television signals is introduced in detail and the developing direction——the full channel teletext system is also mentioned.vitical backward interval teletext system; full channel teletext system;\ CATV net