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随着有线电视台多年的建设和发展,已步入光纤CATV时代。目前,各乡镇的光纤CATV系统已经开通,光纤网络的建成与完善,为会议电视系统的建设奠定了物质基础。利用CATV光纤网络中的回传或备用光纤,采用一根光纤实现乡镇到市台的上行图像、声音和数据信号的传输,下行信号的传输借用现有CATV系统中的一至三个频道,经过加密处理后和现有有线电视信号一起传至各乡镇分会场,经解密器解
With the many years of construction and development of cable television stations, it has entered the era of optical fiber CATV. At present, the optical fiber CATV system of all towns and villages has been opened up, and the completion and improvement of the optical fiber network have laid a material foundation for the construction of the conference television system. Using CATV optical network back-pass or backup optical fiber, the use of a fiber to achieve the township to the city of Taiwan uplink image, voice and data signal transmission, downlink signal transmission to borrow existing CATV system one to three channels, encrypted After processing and the existing cable TV signals transmitted to the township sub-venue, the decryptor solution