Quote:
Originally Posted by Scottnot
From the quoted text:
In Table 9.3, “vertical lines” refers to the number of active lines in the picture. “Pixels” refers
to the number of pixels during the active line. “Aspect ratio” refers to the picture aspect ratio. “Picture rate” refers to the number of frames or fields per second. In the values for picture rate, “P” refers to progressive scanning, and “I” refers to interlaced scanning. Note that both 60.00 Hz and 59.94 (60x1000/1001) Hz picture rates are allowed. Dual rates are allowed also at the picture rates of 30 Hz and 24 Hz.
Table 9.3 Digital Television Standard Video Formats
Vertical lines Pixels Aspect ratio Picture rate
1080 1920 16:9 60I, 30P, 24P
720 1280 16:9 60P, 30P, 24P
480 704 16:9 and 4:3 60P, 60I, 30P, 24P
480 640 4:3 60P, 60I, 30P, 24P
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From what you are saying (I think) the vertical lines being at least 720 is what defines an HD set.
I had thought the next item - pixels - was the number of horizontal lines, but you are saying it is not - but is a measurement of pixels.
Can you elaborate on the 'Pixels' portion of this equation? I don't understand "during the active line".
Thanks