Tag Archive: High-definition television


From HD to 3D

Paper glasses for viewing Anaglyphs.

Since it’s launch in the beginning of the millenia, HD has been popular with all technology enthusiasts and couch potatoes alike. It has a evolved from a 720p format all the way up to a 1080i format (check my post about HD & ATT Uverse for more about this). Well, there is only so much fine tuning you can do to HD before we start seeing the cellular structure of people, and I don’t see that as being appealing to anyone but biologist. So where do we go next?…. Along with eye popping color, why not an eye popping picture all together?…. 3D TV of course.  Most people have seen at least one 3D movie, I mean every movie theater features at least 2 3D films at any given time these days. Few people though, have seen a 3D TV in action.

Did you know that the first 3D movie debuted in 1922? 3D is not a new technology although it has, like other technologies, evolved tremendously. The technology behind 3D has all to do with light. In essence, that is how we are able to see anything at all. Light enters your eyes and bounces off of the rods and cons which creates a picture in your mind. When an object is still, the light from it reaches each eye at the same time.When an object is moving, the light no longer reaches each eye at the same time. This is what creates the three dimensional picture that is real life. On a TV, the screen itself never moves therefor, the light from the screen always reaches your each eye at the same time which your brain interprets as a flat or or two-dimensional moving picture. For a 3D TV to create a 3D picture, it has to show you the same image in two slightly different locations to try and somewhat mimic how light reflects off of a real object ultimately creating depth. In order to create this double image that will be properly interpreted by your brain, special lenses are needed. Many people are familiar with 3D glasses which use special lenses. The two identical images that a 3D TV produces are filtered by 3D glasses so that your brain can interpret it as one three dimensional image. 3D glasses will either use passive lenses which use the red and blue color scheme to unify the double picture or they may use the more advanced active lenses which rely on fast flashing double images and infrared technology. Either way, you need 3D glasses to view 3D movie as it is meant to be seen. Without 3D glasses, you will see a somewhat blurry double image which will soon give you a headache.  Just as an HD TV needs the assistance of an HD receiver in order to broadcast HD channels, so does a 3D TV need 3D glasses to properly display a 3D picture. This has probably been the biggest obstacle to the mainstream popularity of 3D TVs. Although they have been available for a couple of years now, the idea of having to put on special glasses to view movies is not appealing to many. Another obstacle is the availability of live 3D programming. TV providers have few options for individuals who want to view 3D channels. For example, AT&T Uverse TV offers one 3D channel, ESPN 3D but I’ve heard that they may be dropping it until 3D picks up a little more popularity. Watching the same 3D DVDs over and over again is far from what we are used to today with all the variety of programs available on the hundreds of channels at out finger tips. Until more networks begin to make shows and movies in a 3D format, 3D TVs will remain far behind HD TVs.

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HD and AT&T Uverse

Not_HD_ready_logo

Image via Wikipedia

In technology years, high definition service is already old news although still very popular. It keeps it’s popularity because different factors that effect HD keep getting better. Sometimes it’s a new TV that re-invigorates it or a new format or, as of recently, a network update like that which AT&T Uverse TV service has implemented. Link any chain, HD is only as strong as it’s weakest link. In the case the weakest link has always been the service provider. Now, with fiber optics to patch up the gaps, TV service providers, like AT&T, can really maximize what the technology has to offer. High Definition is a form of television that offers superior digital quality above the current standard definition service. HD offers a 16:9 aspect ratio as compared to SD which is 4:3 which means that the screen is wider than it is tall with an HD TV. It is meant to mimic the movie theater view. Aside from the aspect ratio, HD also provides a crystal clear and quality picture. That is achieved because HD offers a higher resolution by using more than 2 Million pixels. A pixel is simply a very small point on your TV that holds a very small piece of an image. The more pixels you have the more detailed the picture on the screen is. By comparison, a standard definition TV  uses about 500,00 pixels (way less than half of what an HD TV offers). In order to view something in High definition, an HD receiver, HD programming, and an HD TV are required.

  • HD receiver/ set top box: Cable companies or any other TV company must provide you with an HD enabled receiver in order for you to view HD from your HD TV. TV companies usually have standard receivers (for standard definition TVs), HD receivers, Standard-DVR receivers (with recording capabilities), and HD-DVR receivers. Most TV companies will provide one receiver for free (usually a not a DVR) and any additional receivers you may need will require a monthly rental fee.
  • HD TV: You can buy an HD TV anywhere theses days and the prices get lower and lower as the technology becomes more common place. By the way, HD TVs come in different levels. The levels are usually 720i, 720p, 1080i, and 1080p. An HD TV that is 1080p is the best of them all and is closer to blue ray quality than any of other other levels. Make sure to talk with an employee in the electronics store/ department to get a better explanation of what would be better for your preference (and budget).
  • HD Programming: Now that you have an HD TV and an HD receiver, you will need HD channels to watch. This is the service that allows your HD receiver and your HD TV to have access to the HD channel range. Keep in mind, not all channels are offered in HD. Those channels that are available in HD are usually duplicates of the standard version. For example, channel 3 is ABC in standard definition but channel 403 is ABC in high definition. In order for a channel to be available in HD, the network that owns the channel has to use HD cameras to film shows or movies. Those that do not o this, will only be able to offer programming in SD regardless of the what equipment you have.

Remember that last link in the chain, the service provider. If you are going to spend all kinds of money on a fancy HD TV, then make sure to choose the TV provider that can maximize what you paid for. If you have Uverse or FiOS services available in your area, that’s the winner.

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