To overcome the limitations of the usage of a fixed-screen broadcast system, expanding the applications of electronic screen.
以克服固定式屏幕播放系统存在的使用局限性，扩大电子屏幕的应用场合。
The designed system includes functions of audio and video broadcast, screen image broadcast, interaction of electronic whiteboard, real-time courseware making, etc.
所设计的系统具有视音频广播、屏幕图像广播、课件制作等功能。
The electronic device includes a tuner unit that receives broadcast waves;
电子装置包括：调谐器单元，其用于接收广播波；
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