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From: hamilton@intersil.uucp (Fred Hamilton)
Newsgroups: comp.sys.amiga
Subject: Re: Color Bleeding in Video Titles
Message-ID: <212@intersil.uucp>
Date: 8 Nov 89 17:26:10 GMT
References: <735@orange9.qtp.ufl.edu> <745@tardis.Tymnet.COM> <2096@jato.Jpl.Nasa.Gov>
Distribution: na
Organization: Harris Semiconductor, Santa Clara CA
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In article <2096@jato.Jpl.Nasa.Gov>, hammock@mars.jpl.nasa.gov (Randy Hammock) writes:
> 
> As many people have stated, RED and BLUE are hard to reproduce under NTSC
> (Never Twice Same Color).  Something else that must be concidered is the
> saturation or level of the color.  At no time should you allow the any one
> color to exceed 12 on a scale of 0 to 15 when setting the color levels.
> Also, youe should not let the color level be set lower than 1.  This kind
> of cuts down on the number of colors that can be displayed but keeps the
> color signals within the normal limits of the NTSC signal levels.  I don't
> remember the values completely but, a color level should not exceed about
> 70% of the video level and should not be less than about 1%.  It has been
> 15 years since I played in a studio so I don't rememr the values exactly.

Actually, the best way to adjust the levels is to scale the signals once
they're in analog form.  This would allow you to keep the sixteen levels
per color, but stay within the saturation limits of NTSC.

> 
> Randy Hammock
> 
> AMIGA /// |   randy@jato.jpl.nasa.gov  Telos - Jet Propulsion Laboratory - NASA
>      ///  | hammock@mars.jpl.nasa.gov     ** GALILEO launch October 1989 **
>  \\\///   |--------------------------------------------------------------------
>   \XX/    | "If I wanted your opinions, I'd have given them to you!" - Mock
-- 
Fred Hamilton                  Any views, comments, or ideas expressed here
Harris Semiconductor           are entirely my own.  Even good ones.
Santa Clara, CA