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|Originally posted by John Mason:
If you measure broadcast (6-Mhz-channel) NTSC horizontal resolution, you'll see about 330 lines per picture height, or 1.33 X 330 = ~440 lines across the width of a 4:3 screen. Vertical static resolution will be about 336 lines (a Kell factor of about 0.7 X 480).
WPTV/WFLX West Palm Beach, FL
|Originally posted by David McRoy:
The current state of the art in NTSC decoder technology limits horizontal resolution to about 336 lines for OTA or cable analog reception, and that's just for luminance (the black and white part of the signal.) Chroma resolution (color) doesn't fair nearly so well...
|...and DVD much better (up to 500 or so for luminance.)|
|But for all standard-definition NTSC sources the numbr of horizontal scanning lines which contribute to vertical resolution is always 483. "480" is a shorthand approximation.|