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VISUAL
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LCD & PLASMA TVs
What is HD (High Definition)?
High-definition signals require a high-definition television or computer monitor in order to be viewed. High-definition video has an aspect ratio of 16:9 (1.78:1). The aspect ratio of regular widescreen film shot today is typically 1.85:1 or 2.40:1 (sometimes traditionally quoted at 2.35:1). Standard-definition television (SDTV) has a 4:3 (1.33:1) aspect ratio, although in recent years many broadcasters have transmitted programs "squeezed" horizntally in 16-9 anamorphic format, in hopes that the viewer has a 16-9 set which stretches the image out to normal-looking proportions, or a set which "squishes" the image vertically to present a "letterbox" view of the image, again with correct proportions.
High-definition television (HDTV) resolution is 1080 or 720 lines. In contrast, regular digital television (DTV) is 486 lines (upon which NTSC is based) or 576 lines (upon which PAL/SECAM are based). However, since HD is broadcast digitally, its introduction sometimes coincides with the introduction of DTV. Additionally, current DVD quality is not high-definition, although the high-definition disc systems HD-DVD and Blu-ray are.
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LG 50PQ30R (Multisystem)
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Samsung LA-37A450 (Multisystem)
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Sony KLV-19T400A (Multisystem)
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LG 26LG30R (Multisystem)
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Sharp LC-32A53M (Multisystem)
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Panasonic TH-42PY800 (Multisystem)
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Panasonic TH-P42C10S (Multisystem)
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Sharp LC-32A37M (Multisystem)
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Sharp LC-46A66M (Multisystem)
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Sharp LC-42A66M (Multisystem)
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Samsung UA-40B6000 (Multisystem)
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LG 42PQ30R (Multisystem)
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Samsung LA-32B530 (Multisystem)
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Panasonic TH-L37X10S (Multisystem)
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Panasonic TH-P50C10R (Multisystem)
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Samsung LA-26B530 (Multsystem)
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