Newsgroups: sci.engr.television.advanced
Subject: Re: From S-video to scart connection
References:  <[email protected]>
From: Tomi Holger Engdahl 
Date: 28 Dec 2001 14:30:03 +0200
Message-ID: 
Organization: Helsinki University of Technology, Finland
Lines: 49
X-Newsreader: Gnus v5.7/Emacs 20.7
John Mason  writes:

> Maurizio wrote:
> > 
> > I connected tv-out (S-video) of my notebook (Compaq Presario 705EA) with
> > scart tv-in of some tv (not new). I can see only black and white image. Why?
> > Compaq Technical Support say that is possible only S-video/S-video
> > connecting. I live in Italy (PAL). How can I see colour images on tv? Is a
> > cable's problem? Is possible convert from S-video to normal scart?
> > Thanks.
> > Maurizio
> 
> Believe scart has distinctly separate RGBHV signals, 

You believe wrong. 

The Scart is a twenty one pin connector plug developed by the European
community and found on the back of most European televisions and video
players. It is used in most of the consumer video equipments like
VCRs, TVs and DVD players to hand the audio and video connections all
using some connector. SCART connector supports stereo audio, composite
video, S-video, RGB and some control signals. SCART connector can use
to carry many signal formats, but it can't carry all of them at the
same time. Note that not all SCART connections in all equipment are
equivalent, connectors on other equipments might support more signal
format than others. Composite video and audio are practically always
supported, but there are lots of equipments which do not support RGB
or S-video. For example some TVs support RGB on one SCART and S-video
on other SCART (in addition to standard composite video format). 
The supported RGB signal format is RGBS (R, G, B and composite sync).

> while S-video only
> has a separate luminance and color signals. 

Some SCART implementations support S-video, some don't.

> You'd need an electronic
> transcoder to convert S-video into scart (5-wire component). You could
> expect to see B&W only with the setup you tried. --John

If the SCART you use supports S-video, then you get colors with
S-video nicely. If there is no S-video support, then you need to
convert the signal format to som supported format
(composite video or RGBS). 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/