What are the transmission media for digital TV?
According to different transmission media, it is mainly divided into: terrestrial digital TV, cable digital TV (including optical fiber,
Copper shaft and hybrid network of both), satellite digital TV, etc.
What are the advantages and characteristics of digital TV?
(1) High definition and good audio effect. Because digital signals are used throughout the digital television process, they are not affected by program editing, transmission, rebroadcasting and reception. SDTV digital TV programs can reach DVD quality, and the definition is 4 times higher than current TV when watching HDTV programs, as clear as 35mm movies.
(2) High frequency band utilization. The original PAL channel can play 4 to 8 sets of SD digital TV.
(3) Good anti-interference performance. Solved the problems of flicker, ghosting, and bright color cross-talk in analog TV;
It can achieve high-quality reception of urban buildings, and mobile carriers can also receive clear digital TV programs.
(4) Facilitate the development of various integrated services and interactive services (including Internet services), which is conducive to the construction of "three networks in one" information infrastructure.
(5) Applications such as program encryption processing.
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