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利用学校的有线电视网络及设备将讲座、会议等现场画面从演播室传送到教室是一种很好的视频传输方式,但用摄像机拍摄投影屏幕,有时会产生偏色和字迹模糊的问题,从而影响了视频传送的效果。笔者就这一现象进行了一些探究,尝试在理论与实践相结合的基础上,找出问题产生的原因及解决的方法。
Using a school’s cable network and equipment to deliver live images of lectures, conferences, etc., from the studio to the classroom is a good way to transfer video, but shooting a projection screen with a video camera can sometimes cause problems with color cast and blurred writing. Affect the effect of video transmission. The author made some explorations on this phenomenon and tried to find out the causes of the problems and the solutions based on the combination of theory and practice.