How Does HDTV Actually Work

It was in 1998, when the first high definition television (HDTV) sets were introduced. Television audience, for the first time were introduced to a detailed and brighter picture on their TV screens. Though HDTV doesn’t portray the exact representation of the world, it is very close to the real images and colors. The superior resolution it offers has made it a household TV as more and more consumers caught on it.

Although, when HDTVs were first introduced for commercial use, they wasn’t able to improve the picture quality significantly. This is because they were unable to catch HD signals quick enough. However, over time, as the televisions improved so did the digital signals, which eventually led to a surge in HDTV purchases. This is also why many satellite companies are offering new customer deals (Directv bundles etc.) as the demand for HDTV and HD content is on a constant rise.

This article will explain how HDTV is able to deliver superior resolution and picture quality.


Signal Broadcasting and Reception:

Like computers, HDTVs use digital signals to process images on your screens. Earlier, old-style standard definition televisions (SDTVs) used analog signals to transmit data. They which were quite vulnerable as they could easily be interrupted by rain, thunderstorm and bad weather, generally. Also, signal reception was contingent to the quality of TV sets.

However, since HDTVs broadcast signals digitally, they have a stronger reception which isn’t easily disrupted by bad weather. To get a signal for your HDTV, you can use any one of the following: An antenna, a cable or a satellite service. If you choose from the latter two, make sure to check in with your service provider if they offer packages which include HDTV stations.

Furthermore, TV sets today are of much better quality than ever as they support digital signal reception. Because of HDTV’s better compression techniques, there is no limit to the picture and sound data that can be transmitted through the signal. Thus, because of the consistent signal broadcasting and reception, HDTVs are able to decode and decrypt the message which allows to process the message (images) on TV screens.

More Pixels

Ever wondered how the images and pictures displayed by HDTV are clear, without showing any fuzziness or flicker? Of course you have!

Even when the picture is shown on large television screens, you must have noticed that it does not flicker. This is because HDTV has a much higher picture resolution than the traditional SDTV.

The old style SDTV had 480 lines of pixels which is not even close to today’s current HDTV standard. For a television to deliver a high definition image, it needs to have at least 1080 lines of interlaced pixels or 1080 progressive pixels. This increase in pixels ensures that viewers get to see a much more detailed image on their screens.

Also, if you switch to a larger screen sometime in the future (if you haven’t already), you would not experience any fuzziness as with the SDTV. This is because HDTV has a bigger aspect ratio of 16:9 which is compatible with TV screens today (which are rectangle compared to traditional screens that were squared shape with an aspect ratio of 4:3).

High definition televisions basically rely on the signal strength and its ability to receive and decode data in order to process content on the screen. Thanks to the digital signals, HDTV delivers picture quality better than ever.

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About the Author: Shameem

I am Shameem, Software Engineer, Web Addicted, Living in Chennai, India.

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