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Understanding the HDTV TV Tuner
Soon, the entire world will be watching television in HDTV which makes the HDTV TV tuner a necessity. HDTV seems to be a magic term synonymous with electronics gadgets as projected in any news item or article appearing these days. If you were unaware, all this hype refers to the latest digital broadcasting format, High Definition Television. This means that the image resolution of the shows you are watching will be the greatest technology available today.
Simply put, an HDTV tuner receives MPEG-2 encoded packets from over-the-air or cable broadcasts. These packets are then provided to HDTV tuner software meant for that purpose. The downside is that you totally lose the data if the packets come in out of order. An HDTV tuner is therefore significantly different from analog broadcasts, in that it either delivers it all, or nothing at all. With analog tuners, even faint signals can be received and shown onscreen, but the picture quality will be very poor, producing the famous "snow" effect.
There are two important things to look for in your HDTV tuner: it should be able to get cable QAM and it ought to also allow for utilization with a PC processor. You ought to also realize the way it treats less strong and multi-path signals. Also, if you want to get an HDTV tuner, then cost is something you need to consider.
Signals which are obstructed and reflected by objects like trees and buildings are called multi-path signals. In these circumstances, you will receive a ghosted picture if you have an analog signal. HDTVs, conversely, run the risk of loss of data owing to multi-path signals affecting their capturing signals. Consequently packets will be lost, which will ultimately create erratic pictures or a flickering screen.
One mark of a high-quality HDTV tuner is the ability to pick up strong signals while filtering out the results of multi-path fading. Living where there are many obstacles means you'll have many multi-path signals. Under these circumstances, it's highly recommended that you select an HDTV tuner with an enhanced ability to filter multi-path signals.
Whether we like it or not, HDTV technology is here to stay. The problem is that there's so much HDTV stuff to choose from, it can be difficult figuring out what's essential and what's merely nice to have. Find out more about the choices in HDTV technology at Gizmos, Gadgets and Toys.
BuyTV, Episode 138, KWorld Digital ATSC QAM TV Tuner Box Reveiver