摘要
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。
In 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.
关键词
场逆程图文电视
有线电视网
图文电视系统
vitical backward interval teletext system
full channel teletext system
\ CATV net
