所谓的图文电视是把文字和图形构成的图像信息,用数字编码处理的方法,插入视频信号的场消隐期间而进行发送和接收的一种电视广播,对电视接收机而言,需要增加图文电视解码器,才能收看图文电视广播。 A so-called teletext is a type of television broadcast in which image information composed of characters and figures is digitally encoded and transmitted and received while being inserted into a field blanking interval of a video signal. To a television receiver, it is necessary to increase Teletext decoder to view teletext.