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What is HDTV?

HDTV is also known as high definition TV. It provides a resolution up to six times that of a standard TV (a.k.a. sdtv). also, HDTV usually includes Dolby surround sound in its programming and provides aspect ratios of 16x9 (also known as widescreen).


What do i need to watch HDTV?

In order to experience HDTV, you need to purchase a TV that is capable of displaying an HDTV image. In order to choose that you need to know some information about what different types of HDTVs there are and there advantages/disadvantages. be sure to check out "choosing the right HDTV" section. also, You will need a method of receiving HDTV. many HDTVs today come with a tuner that is capable or receiving HDTV. most cable and satellite services offer HDTV for a nominal monthly fee above the standard subscription rate.


What is so good about HDTV?


  • Traditional standard definition analog televisions have about 330 lines of resolution (less than 480i/p).
  • VCRs have about 240 lines of resolution, which is why VHS recordings don't look as sharp as the original broadcast.
  • DVDs offer higher resolution than VCRs or standard definition TV, typically on the order of 480 lines of resolution aka 480i/p.
  • HD offers at least 720 lines of resolution, which is at least twice that of analog television. You can expect razor sharp images from HD
  • HDTV also offers Dolby 5.1 surround sound on many programs, bringing your ears into a 3d spectrum of sound.
  • HDTV is broadcast over digital TV waves, which have no ghosting or static so common to analog TV waves.

What does that 480i/480p/720p/1080i/1080p thing mean?

480i/480p/720p/1080i/1080p refers to the resolution of what you are watching.

  • 480i is what traditional programming is delivered at, also known as SDTV, or standard definition TV
  • 480p is the same as 480i, but with a progressive scan image. progressive scan images are all displayed at once, as opposed to interlaced images which draw half of the lines first then goes ahead and draws the rest of them. progressive scan reduces flicker and provides a more quality image.
  • 720p is a regular HDTV image offering 720 lines of resolution. many HDTV channels broadcast in 720p
  • 1080i is another HDTV broadcast resolution, interlacing 1080 lines of resolution, offering the highest quality image in broadcast TV today.
  • 1080p is the same resolution as 1080i, but with progressive scan for the most crisp image available today. devices that output 1080p signals would be game systems such as Microsoft's Xbox360, and Sony's Playstation 3, along with the 2 competing high definition movie disk standards, known as HD-DVD and Blu-ray disc.


   
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