This Article will, beginning from the theory and structure of digital TV, discuss the implementation of digital TV broadcasting system.

本文试从数字电视的原理及结构出发，讨论数字电视播出系统的实施。

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The scheme is not only to be implemented easily and to reduce maintenance cost but also greatly improves the efficiency and capacity of the mobile TV broadcasting system.

该授权机制不但易于实现，便于日常管理和维护，而且大大提高了整个移动数字电视广播系统的效率和容量。

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I thought back to the periodic interruption I'd grown up with in the mid-20th century — the ear-invading tone that was part of the radio and TV "emergency broadcasting system" test.

是我回想起我所成长的20世纪中页的耳熟能详的周期性断电，耳边回荡着“备用广播电视应急”测试的声音。

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