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Write a short note on HDTV resolution and explain its working
written 6.7 years ago by gravatar for teamques10 teamques10 ★ 68k •   modified 5.3 years ago
tv and video engineering
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written 6.7 years ago by gravatar for teamques10 teamques10 ★ 68k

  • The HDTV may be transmitted in the following resolutions:

    1. 1080p: 1920 x 1080 p = 2.07 Megapixels/sec.
    2. 1080i: 1920 x 1080 i = 2.07 Megapixels/sec.
    3. 720p: 1280 x 720 p = 9.21 Kilopixels/sec.

  • ‘p’ stands for progressive scanning and ‘i’ stands for interlaced scanning. If the HD TV transmission takes place at 2.07 Megahertz/frame then HD TV provides about 5 times as many pixels as those provided by SDTV this improve the resolution of picture to a great extent.

  • The number of pixels per frame as mentioned above will translate into frame rate of 60 frames per second outside India and 50 frames per second for India this rate is twice that of SDTV.
  • One of the most important parameter of HDTV is that its aspect ratio is 16:9 i.e. 1.78 as compared to the aspect ratio of 4:3 i.e. 1.33 of SDTV. This enhances the viewer’s experience due to wider screen.
  • The sound quality of HDTV is reproduces Dolby Digital sound which supports 5.1 surround sound format, this will result in theatre quality sound the file format and compression standard used for HDTV is MPEG-2.
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