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000267_owner-lightwav…mail.webcom.com_Wed Aug 16 10:48:06 1995.msg
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To: lightwave@webcom.webcom.com
From: c404266@mizzou1.missouri.edu (John Ferrel)
Subject: (Digital) video resolution
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>If you read the PVR docs it clearly says that the image size it expects
>is 720 X 480. NTSC D1 videos is generally considered to be 720 X 480. D2
>is 752 X 480. While NTSC analog video is not pixel oriented it's not to
>difficult to relate to pixel oriented imagery based on the video systems
>frequency response and bandwith which will determine how many vertical
>lines or dots that the system can 'resolve'. It's not that rectangular
>pixels are 'better' it's just the way it is. The fact that a square pixel
>640 X 480 image is the default for AVID is simply a convenience for
>users, AVID is scaling that image to fit into NTSC space.
>
Aren't D1 & D2 supposed to be "broadcast quality"? AFAIK, NTSC has 525 scan
lines. Isn't 480 < 525. Is this number correct? ...Or is that 720 lines
by 480 pixels? I may be confused.
Thanks,
John
+++++++++++++++++++++++++++++++++++++++++++++++++
John Ferrel C404266@mizzou1.missouri.edu
Rm# 259
University of Missouri Research Reactor
Reactor Park
Columbia, MO 65211
(314) 882-5248 or 5338 Work
(314) 443-0077 Home
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c404266@mizzou1.missouri.edu (John Ferrel) sent this message.
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