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1. The difference between analog TV, digital TV, OTT and IPTV
(1) Analog TV: After receiving analog signals from satellites, they are all pushed to the user's TV terminal by broadcasting, and the terminal selects different programs by selecting different frequencies.
(2) Digital TV: Receive signals from satellites, pass video compression and digital processing, then pass QAM modulation, and then broadcast to user terminals via the network. The difference between digital TV and analog TV is that the transmitted content becomes digital.
(3) IPTV: The signal received from the satellite undergoes video compression processing, and then the compressed message is streamed through IP to become an IP message, which is transmitted to the user's home through the IP network, so it can make full use of the IP network. Reachability and the superiority of IP network transmission efficiency.
(4) OTT: Over The Top TV refers to video services based on the open Internet, which means to provide services on top of the network, emphasizing the irrelevance of the service to the physical network. Video programs transmitted via the Internet.
Simply put, the difference between IPTV and OTT is:
1) IPTV uses independent networking, while OTT is superimposed on the broadband network;
2) IPTV has QoS guarantee, but OTT does not;
3) IPTV broadcasts provide program sources in various places, with live TV broadcasting, but not OTT.
1.2 Definition and characteristics of IPTV
All IPTV systems use IP networks for video transmission, which is correct, but on the other hand, the systems that use IP networks for video transmission are all IPTV, which is wrong. IPTV transmits traditional broadcast channels to consumers on an IP network to replace terrestrial broadcast, CATV and satellite services. Although they all use IP networks, unlike Internet video broadcast on the public Internet, IPTV services are almost transmitted through a private network. From the terminal point of view, an IPTV set-top box is needed. It converts the incoming IPTV signal into a standard video signal for display on the TV at home.
The main features of IPTV are:
1) Continuous video stream: professionally produced content (such as sent from a TV broadcast network);
2) Hundreds of non-stop, continuous broadcasting channels;
3) Unified content format (all channels share one compression method and use the same bit rate)
4) Transmission on a dedicated network;
5) Watch on the home TV through a set-top box
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af.fmuser.org ->Afrikaans
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eu.fmuser.org ->Basque
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hi.fmuser.org ->Hindi
hu.fmuser.org ->Hungarian
is.fmuser.org ->Icelandic
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