RE: svideo->svideo vs. svideo->RGB

["Keith Doxey" <lists.diyha@xxxxxxx>]

Will do.


Keith 

www.diyha.co.uk 
www.kat5.tv 

-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 05 April 2002 13:53
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] svideo->svideo vs. svideo->RGB


Keith,

This is the best summary of this I've ever seen! Can you make sure it
goes
as a page up on your website so I can point non-list-members at it???

Regards,

Mark Harrison 
Head of Systems, eKingfisher 

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-----Original Message-----
From: Keith Doxey [mailto:lists.diyha@xxxxxxx]
Sent: 5 April 2002 13:40
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] svideo->svideo vs. svideo->RGB


NO.

Component is TOTALLY different to RGB

A TV (or any other LCD/CRT etc) displays 3 signals RED GREEN and BLUE.
These
contain the information that makes up the picture, additionally the TV
requires 2 timing signals - Horizontal and Vertical syncronisation pulses
to
define when each line or frame of the picture starts. 

It is how these make it to the display that ultimately decides how good
or
bad the picture is.

Starting witht he best and working down the list, here are the
definitions
and how many cables are required

RGBHV    5 cables

A PC outputs RGBHV from its VGA connector (I wont mention any digital
formats as that is not relevant to this topic).  That is the PUREST
form of
ANALOGUE video you will find as each of the 5 signals is transfered
discretely.

RGBS aka RGB    4 cables

Discrete colour signals but a COMPOSITE SYNC (S) signal containing
H&V
pulses. Many items of domestic video equipment that claim to output RGB
actually output RGB+CompositeVideo rather than RGB+CompositeSync. For a
TV
this is no problem but some monitors can get upset if they expect true
sync
pulses.


RGsB aka SyncOnGreen or SoG     3 cables

As RGBS except that instead of a separate Sync signal is sent on the
GREEN
colour signal just like Composite Video


Component Video aka Y-Cr-Cb    3 cables

A black and white composite video signal containing Luminance LUMA 
(Y)
Brightness information and composite sync. Cr and Cb are two signals
containing matrixed colour information to extrace the Red/Blue from the
picture information in the Y signal. One the red and blue is removed
the
only information left is green.

S-Video aka Y-C    2 cables

A black and white composite video signal containing Luminance LUMA 
(Y)
Brightness information and composite sync. CHROMA (C) contains ALL the
colour information.

Composite Video    1 cable

Almost the lowest of the low. Contains all information for RGB and HV. 

RF    can have many signals on 1 cable

The lowest of the low. Composite Video and usually Audio as well,
modulated
to a much higher frequency but can enable multiple signals to be
distributed
over the same cable by choosing different carrier frequencies






Keith 

www.diyha.co.uk 
www.kat5.tv 

-----Original Message-----
From: Dan Khan [mailto:dan@xxxxxxx]
Sent: 05 April 2002 12:02
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] svideo->svideo vs. svideo->RGB


On a similar off topic :)

My amp switches component video as well as svideo.  My tv has 2
rgb
scarts which are both used.

Is it possible to route signals from the component video outlets on the
amp, into an RGB-enabled scart socket on the TV?  I haven't managed
to
find a cable (online) that will do component video --> RGB scart.

Any ideas?

Thanks
-Dan




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