Re: RGBA with 8 samples on IR
Orad Hi-Tec Systems (orad_u++at++netvision.net.il)
Thu, 10 Oct 1996 14:47:26 +0300
Angus Dorbie wrote:
>
> On Oct 10, 9:39am, Orad Hi-Tec Systems wrote:
> > Subject: Re: RGBA with 8 samples on IR
> > Remi Arnaud wrote:
> > >
> > > Here is a message from Ziv Gigus <ziv++at++argus>
> > >
> > > IR's hardware was designed to support either 10 bit RGB (no A) or 12
> > > bit RGBA. It was never designed to support 10 bit RGBA and no future
> > > flavour of IR ever will.
> > >
> > WHY !?
> > As was mentioned, the alpha in the framebuffer is mostly needed by
> > applications in a video environment. Highest quality digital video
> > is 10 bits, never 12. (Also on the monitor side, it was mentioned that
> > the DACs dither to 10 bit). So what is really needed is 10 bit RGBA,
> > not 12 bit RGBA.
>
> But you may need more precision if you want to gamma correct before
> the DACs which is exactly what you do on iR.
>
Does the iR apply gamma tables on the Sirius channel (either
when it is independent or when it "steals" from another DG4 channel)?
Bye,
Moshe Nissim
Orad Hi-Tec Systems
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on Mon Aug 10 1998 - 17:53:45 PDT