【摘要】 用图文电视技术构成电视数据广播系统可以同时传送电视信号和数字信号 ,这种新通信技术的设计和安装很方便 ,能节约设备的购置和安装投资 ,可实现双向闭路电视教学、多媒体教学、教学管理、计算机网络通信等多系统的合一更多还原

【Abstract】 By using teletext technique to constitute the television data and broadcast system to transfer these two kinds of signals at the same time, the design and fixed of this new communication technology is very convenient. It can save interest of the equipments and the instrument, and makes the double to face television networks, the multimedia teaching system, the teaching manage, and the computer network into one.更多还原