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NTSC

NTSC

National Television System Committee. NTSC is the name of the analogue TV standard used in the USA, Canada, Mexico and Japan.

An NTSC picture is made of 525 scan lines of which 486 are visible. Each horizontal line provides 720 pixels. Thus the viewable area of an NTSC picture is 720 by 486. Whilst NTSC has a conventional non-widescreen aspect ratio of 4:3, each pixel is not square but are slightly narrower than they are tall.

An NTSC picture is interlaced, images are transmitted at 59.94Hz, giving approximately 30 complete frames per second.

cf SDTV, HDTV, PAL.

Relevant links:

http://people.csail.mit.edu/tbuehler/video/ntsc.html - NTSC Basics.
www.paradiso-design.net/videostandards_en.html - Television Standards - PAL to NTSC.

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