HDTV

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HDTV

• Katherine Wolak

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High-definition Television

• HDTV-
• Television system that has twice the standard
  number of scanning lines per frame
• Produces pictures with greater detail

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How HDTV Works

• HD broadcasts use 420 and 8-bit quantization to
  save bandwidth
• The pixel aspect ratio of a HD signal is a
  "square" inch, which each pixel's height equals
  its width
• HDTV is capable of theatre-quality" audio
  because
• It uses the Dolby Digital (AC-3) format to
  support "5.1 surround sound
• Non-technical explanation of how it works
• Digitally broadcastless bandwidth
• Less bandwidthbetter picture
• Better picturemore vibrant/realistic colors

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History of HDTV

• In 1949, France launched 819 lines television,
  first high definition public television network
  (778 active lines). This 819 lines network
  remained operational until 1983.
• In 1958, the U.S.S.R created ?????????????
  (Transformer), the first high-resolution
  (definition) television system capable of
  producing an image composed of 1,125 lines of
  resolution for the purpose of television
  conferences among military commands as it was a
  military product, it was not commercialised.
• In 1969, Nippon Hoso Kvokai (NHK) first developed
  commercial, high-definition television, yet, the
  system was not commercialized until late in the
  1990s.
• First HDTV commercial experiments as NHK's MUSE
  required over four times the bandwidth of a
  standard definition broadcast, and despite the
  effort made to shrink the required bandwidth in
  about 2 times of that of the SDTV's, it still was
  distributable only by satellite.

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Current HDTVs

• Sony 52 BRAVIA XBR 1080p Flat-Panel LCD HDTV
• Starting at 3999.99
• Available at
• Best Buy
• http//www.sony.com
• Philips 19 Widescreen LCD HDTV
• Starting at 449.99
• Available at
• Target
• http//www.philips.com

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Needed to Use HDTV

• Components of a typical satellite HDTV system1.
  HDTV Monitor2. HD satellite receiver3. Standard
  satellite dish4. HDMI cable, DVI-D and audio
  cables, or audio and component video cables

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My Opinion of HDTV

• I have an HDTV, and it is so much better then
  SDTV. The picture quality is incredibly
  realistic. I love watching programs that come in
  HD because the picture is so crisp and real. I
  would recommend everyone get an HDTV, it pays off.

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Sources

• http//www.wikipedia.org
• http//www.cnet.com