Mainconcept DVCPro CODEC

[enbidia]

Frame sizes in pixels (for 1.25 and 16:9)PAL 720x576, 25 fps (frames per second)NTSC 720x480, 30/29.97 fps

PAL Video size (square pixels): 1.25 (720x576) and 16:9 (1280x576)NTSC Video size (square pixels): 1.25 (600x480) and 16:9 (1013x480

What does above trying to indicate? I thought 4:3 digital NTSC has 0.9091 pixel aspect ratio at 720x480?

[edDV]

Beats me. Square pixel would be 768x576 for 4:3 and 1024x576 for 16:9

http://www.google.com/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial_s&hl=en&q=Adobe+premiere+guide&btnG=Google+Search
http://en.wikipedia.org/wiki/Serial_Digital_Interface
http://www.miranda.com/library.en/Digital%20Standards/Std_BW_booklet.pdf
http://www.t10.org/t11/document.98/98-492v1.pdf (table 2)

[BJ_M]

720/576 = 1.25
600/480 = 1.25



both of the above are correct for 5:4 ratio monitors and 1280 by 1024 pixels, and 1600 by 1280 pixels ratio panels ...

[enbidia]

If DVPro is 1.25 in aspect ratio whereas NTSC is 1.333. Wouldn't the image become stretched or cropped when captured to PC?

[BJ_M]

Standard TV has a 4:3 aspect ratio, not NTSC .. but "standard tv" these days often more and more means wide screen and 5:4 aspect ratios ... or 4:3 aspect ratio ..

in other words - being ntsc doesnt mean it has to be 4:3 BUT if it is ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"), and that requires a horizontal sampling rate of 13.5 MHz and an active line of 720 samples, then the pixel aspect ratio for 525-line video (NTSC) is 10:11. The pixel aspect ratio for 625-line video (PAL) is 59:54


but -- square pixels even then are not really square ! They have an aspect ratio of 768:767, which is very close to 1:1, but which is not truly exactly 1:1

[enbidia]

Why is it only 600x480 square pixels? If I'm capturing from standard 4:3 NTSC TV cannot I have 640x480 square pixels displayed on my PC screen?