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From: pselver@euler.mit.edu (Peter Selverstone)
Newsgroups: comp.sys.amiga.misc
Subject: Re: The 1/2 line artifact (Was: CBM Support is GREAT!)
Message-ID: <1991Mar22.155822.14957@galois.mit.edu>
Date: 22 Mar 91 15:58:22 GMT
References: <1991Mar13.062558.1013@galois.mit.edu> <976@cbmger.UUCP> <1991Mar19.192651.16390@hubcap.clemson.edu>
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In article <1991Mar19.192651.16390@hubcap.clemson.edu> ddyer@hubcap.clemson.edu (Doug Dyer) writes:
>peterk@cbmger.UUCP (Peter Kittel GERMANY) writes:
>
>>In article <1991Mar13.062558.1013@galois.mit.edu> pselver@euler.mit.edu (Peter Selverstone) writes:
>>>In article <19802@cbmvax.commodore.com> daveh@cbmvax.commodore.com (Dave Haynie) writes:
>>>>In article <13397@hubcap.clemson.edu> ddyer@hubcap.clemson.edu (Doug Dyer) writes:
>>>>>
>>>>>(specifically the deinterlacer's flickering black line)?  Is this a bug
>>>>>that they will fix or is it a feature? 
>>>>
>>>>Technically speaking, it's a feature.  Converting a full NTSC frame the way
>>>>the A3000's Amber chip does it is just guaranteed to give you that flickering
>>>>1/2 line.  That's an effect of the NTSC standard and the way its different
>>>>frames get displayed.
>>>
>>>No Dave, NTSC has nothing to do with it.  Don't believe everything
>>>you hear.  An interlaced field has 262.5 horizontal intervals which
>>>become 525 unique lines at twice frequency.  With a static image
>>>there is no reason for these lines to change.
>
>>Sorry to disagree. One of those fields (let's assume the odd one)
>>begins with *a half line starting in the middle of the screen*!
>
>Damn. Its a feature.  Does the flickerfixer do this too?

No.

>-- 
>Hi, I'm a .signature file! Weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!
>                      flames to comp.sys.ibm.pc.misc
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> Doug Dyer ddyer@hubcap.clemson.edu                       (2B)|!(2B) -> ?


-- 
Peter Selverstone  -  Spy Pond Systems - Arlington, MA  -  (617)648-7468
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