Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!lll-tis!ames!pasteur!agate!eris!doug
From: doug@eris (Doug Merritt)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Fixing flicker, & future frame rate issues
Message-ID: <9101@agate.BERKELEY.EDU>
Date: 22 Apr 88 21:37:00 GMT
References: <11157@ut-sally.UUCP> <8528@agate.BERKELEY.EDU> <11182@ut-sally.UUCP> <869@gethen.UUCP> <2988@leo.UUCP>
Sender: usenet@agate.BERKELEY.EDU
Reply-To: doug@eris.UUCP (Doug Merritt)
Organization: University of California, Berkeley
Lines: 32
Summary: Huh?

In article <2988@leo.UUCP> harald@leo.UUCP ( Harald Milne) writes:
>In article <869@gethen.UUCP>, farren@gethen.UUCP (Michael J. Farren) writes:
>> This is not what happens at all.  Non-interlaced mode does NOT have
>> "lines without information", and alternate half-frames are NOT absent.
>	If you don't believe me, record Amiga video in Interlace and
>Non-Interlace.  Interlace will look fine, where Non-Interlace will look like
>sh*t. There is information absent.

I'm not sure I understand this; it seems strange. My understanding is
that both the Amiga's interlaced *and* the non-interlaced video are
fully NTSC compatible, meaning that the video signal always sends first
a field of odd lines (starting at line 1), then a field of odd lines
(starting at line 2). If you look at any given field, you will see
that half the lines are missing...they won't be there until the next
field.

The only difference between interlaced and non-interlaced Amiga
video is that in the latter case, the odd fields are a duplicate
of the even fields, while in the former (interlaced) case, they
are new information.

Am I incorrect? If this is right, then the comment about recording
Amiga video doesn't make sense...the recording on an NTSC video
recorder should look exactly identical to the original Amiga display
(assuming a normal, non-fF display).

Or are you talking about something that *fF* does in non-interlaced
mode, that has some different effect than an Amiga that doesn't
have fF at all???

	Doug Merritt		doug@mica.berkeley.edu (ucbvax!mica!doug)
			or	ucbvax!unisoft!certes!doug
			or	sun.com!cup.portal.com!doug-merritt