视频字符的显示原理是将字符点阵信号与原始视频信号叠加。
The principle of displaying a video character is that a character dot matrix signal is superimposed upon an original video signal.
由于原始视频信号数据量巨大，必须经过压缩才能在无线网络中传输。
Original video data must be compressed for transmission in wireless network because of its high bandwidth.
由于原始视频信号数据量巨大，必须经过压缩才能在无线网络中传输。
Original video data must be compressed for transmission in wireless network because of its high bandwidth.
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