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Analog
Video Format Standards |
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NTSC: |
NTSC
stands for the National Television System Committee of the Electronics
Industries Association. The organization defines the standard
format adopted by the FCC for television broadcast in the United
States, Japan, Canada, and Mexico. This is also called "composite
video" because all of the video information, luminance,
and color combined into a single analog signal. |
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PAL: |
PAL
stands for Phase Alternation by Line, the broadcast video standard
used in West Germany, Great Britain and most Western European
nations. By reversing the relative phase of the color signal
components on alternate scanning lines, this system avoids the
color distortion that appears in NTSC. Otherwise, PAL closely
resembles NTSC. Based on the 50 Hz power system, PAL displays
625 lines interlaced at 50 fields per second (25 frames per
second). |
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SECAM: |
SECAM
stands for Sequential Couleur A Memoire" (sequential color
with memory). Video format used in France, Eastern Europe, F.S.U
and some Middle Eastern countries. Like PAL, SECAM is based
on a 50 Hz power system, displaying interlaced lines at 50 fields
per second. The color information is transmitted sequentially
(R-Y followed by B-Y, etc.) for each line and conveyed by a
frequency modulated sub-carrier that avoids the distortion arising
during NTSC transmission. |
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