After the data compression, people starts to consider how to transmit many video programs in the single channel.

视频信息数据压缩后，人们开始考虑如何在单个信道中，发送多个视频节目。

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It converts a single baseband video channel to an optical signal and transmits it up to 2.5 kilometers to a fiber optic receiver where it is converted back to baseband video for monitoring.

它转换成一个单一的基带视频通道的光信号，传送高达2.5公里，光纤接收器在那里会转换回到基带视频监测。

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The RealD Format combines left eye and right eye 3D image streams into a single channel for delivery of high-definition progressive or interlaced 3D video using today's Internet or broadcast infrastructure, including existing PCs, HD set-top boxes and DVRs, to any 3D-enabled display type.

ENGADGET: PopBox licenses RealD's side by side frame compatible 3D format