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Re: [Discuss-gnuradio] Comb Filter (OT tangent)
From: |
Dave Dodge |
Subject: |
Re: [Discuss-gnuradio] Comb Filter (OT tangent) |
Date: |
Wed, 5 Jan 2005 20:25:13 -0500 |
User-agent: |
Mutt/1.4.2i |
On Wed, Jan 05, 2005 at 08:34:22AM -0500, Cory Papenfuss wrote:
> Maybe someone here knows how easy this would be to do.... I've been
> thinking of trying to make a "dummy" XVideo mode where it would tell an
> application that the card is doing color transformation from YUV->RGB, but
> it actually doesn't. If the vid card does sync-on-green, you could
> generate component video directly then.
>
> It seems like it would be a really easy way to get high-quality TVOUT
I don't know much about the signal-level details, but some things that
immediately come to mind:
- since (if I understand this correctly) you're talking about using an
RGB framebuffer and the RGB signal lines to generate YPrPb signals,
are the RGB voltage ranges going to be what you need?
- it would most likely work for progressive scan. Do you also need
the interlaced component formats?
There are some simple circuit designs floating around for DIY
RGB->component converters, so you could probably figure out
from those whether the signal itself will present any problems.
http://www.epanorama.net/links/videocircuits.html#rgbyuv
-Dave Dodge