图文电视图文电视是利用电视信号帧消隐期间插人发送文字图像信息的技术来实现的。在电视台制作好节目后，把代表文字或图像信息的数据信号，按照一定的格式在帧扫描的回扫时间内插人到正常的电视信号中。节目内容经过计算机技术处理编辑后，利用现郁ｂ广播电视台同步发送... Teletext Teletext is a technique that uses the technique of sending text and image information during television signal frame blanking. After the program has been set up in the television station, data signals representative of text or image information are inserted into the normal television signal within a frame scan flyback time according to a certain format. After the content of the program is edited and processed by computer technology, it is sent synchronously by using radio station b