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A digital satellite newsgathering system

机译:数字卫星新闻采集系统

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摘要

MPEG2-based digital video technologies are being incorporated into satellite newsgathering (SNG) systems to lower broadcasters' sound and video signal transmission costs. Mitsubishi Electric has recently developed eight-phase digital phase-shiftkeying (PSK) modulation technologies and video bandwidth compression technologies that enable a single satellite transponder to carry four video channels—double the two-channel capacity of the previously used analog FM modulation system—while boostingvideo image quality. In addition, a demand assignment multiple access (DAMA) system has been developed to use excess transponder capacity for emergency communications. All data transmissions, including order wire signals, have been converted to digitalform.
机译:基于MPEG2的数字视频技术已被整合到卫星新闻采集(SNG)系统中,以降低广播公司的声音和视频信号传输成本。三菱电机最近开发了八相数字相移键控(PSK)调制技术和视频带宽压缩技术,这些技术使单个卫星转发器能够承载四个视频通道,是以前使用的模拟FM调制系统的两倍,是其两倍。提升视频图像质量。另外,已经开发了需求分配多路访问(DAMA)系统,以将多余的转发器容量用于紧急通信。所有数据传输,包括订单信号,都已转换为数字形式。

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