New technologies are deeply transforming the broadcasting industry. What we have seen so far is only the beginning of a long story. Inevitably, industry regulations must adapt, which means that a wide-ranging rethink of current practices is required. In order to assess the likely evolution of the industry, this article decomposes it into a number of components, from conception of programmes to their broadcasting, including distribution, storage and licensing. Contrary to popular expectations, the analysis suggests that the current high degree of concentration will, if anything, increase. The policy implication is that regulation, so far driven by now obsolete technological constraints, should increasingly emphasize promoting competition.
Broadcasting by satellite has enable the subscriber to cable system, Broadcasting has been a very concentrated and closely regulated industry the limited number of broadcasters was traditionally explained by the ‘spectrum constraint’, Satellite can be constrained by the amount of power they can radiate towards the receiving station, which has necessitated the provision of very large earth station antennas at a limited number of sites around the globe. From these ‘gateway’ stations the telecommunication signals are rooted into the terrestrial network. Now, attention has turned to the broadband and interactive potential of satellite services, as well as the convergence with other technologies such as mobile communications, global positioning and the Internet.
Satellites are used for a large number of purposes. Common types include military (spy) and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit..Satellites are usually semi-independent computer controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.
Communication through satellites is usually done in the way described bellow:.
Television programs origin from a broadcasting studio, it could be a live broadcast or a taped TV program. The program is translated into a signal. The signal is sent up to the satellite with a process called – uplink. When it is received at the satellite, the signal is transmitted to another satellite using a process called turnaround, or it is transmitted back down to earth using a process called downlink. When a signal is down linked back to earth it is received by a satellite dish which we all know.
Because of the whole process of up linking and down linking, there is a transmission delay of a few seconds. This is why viewers of a cable channel will see it a few seconds before the viewers of a satellite channel.
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February 21, 2007 Our ability to observe the ocean is in the midst of a revolution. This is important because the ocean plays a central role in determining the Earth’s habitability, yet remains the least well observed portion of our planet. For decades, the ship has been the mainstay of seagoing ocean sciences. However, a ship can only be at one place at a time, can only carry a small number of scientists, and can only stay at sea for so long. We are breaking down those barriers, creating …
Help answer the question about satellite communication technology
How does my Military job translate into the civilian sector?Im in the United States Air Force. My job is Satellite communications and wide band technology. I was just wondering, when I get out of the service, how and who should I market myself to? (oh, and I have 6 1/2 years in)
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#1 by WPMixer on February 6, 2009 - 6:55 pm
me too, lookin forward to it, ill c u at benning
#2 by lonelywannabe on February 6, 2009 - 7:03 pm
Wireless is a part of electronics engineering which itself comes under electrical engineering. But electronics has developed into many fields and wireless is in almost all electronics from your remote TV to missiles and rockets, car alarms, mobile etc etc . So the basic is electronics. If you want to pursue wireless then you have to do digital communication, video compression, data transmission etc.
You need not go to US. In India itself very good colleges are available.