RE: RGB to Component. Ohh Eck.

["Rob Mouser" <rmouser@xxxxxxx>]

Thanks Keith. Serves me right for rushing into things that I don't fully
understand! The reason for going for the component unit was that my next
'upgrade treat' was to be a Iscan scaler which I understand only has
component inputs (+S-video.). Yes you're right it was partly to free up
an input, the s-video input which is rendered un-usable if you have
anything plugged into the composite input.
I'm sure Phil at Letsautomate will allow me a swap/credit. :-)
I was also being lazy in that I didn't want the hassle of re-soldering
my cabling at either end!!! I Guess I could make up a VGA to phono lead
at the patch panel end? Would save unsoldering my patch panel. Would
that work OK?

Many thanks

Rob Mouser



-----Original Message-----
From: Keith Doxey [mailto:ukha@xxxxxxx]
Sent: 23 July 2003 23:37
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] RGB to Component. Ohh Eck.

Hi Rob,

The picture will be slightly worse but I cant say by how much as I dont
have
the unit or any equipment capable of receiving component. This is not in
anyway a derogatory statement about the JS converter but a statement of
fact. Using an RGB to S-Video converter will also give a worse picture
than
an RGB signal simply because RGB is the purest form of analogue signal
you
can get.

People using an RGB to S converter to replace a Composite Video feed
will
notice quite an improvement in picture.

People using an RGB to Component converter to replace a Composite Video
feed
will notice a great improvement, likewise using Component to replace
S-Video
will also yeild an improvement as you are moving up the quality chain.

TV tubes, Plasma Screens, Projectors and LCD screens all create an image
>from
RGB.

Component was primarily introduced to the American market where TV sets
lacked any form of RGB input and it has wrongly been credited as the
purest
form of signal which it isnt. It is also known as YUV or YCrCb and
consists
of a monochrome picture containing the brigtness info, and two colour
difference signals that are decoded to give the individual colour
signals.

RGB is different in that the RGB signals are actually 3 monochrome
pictures
containing the brightness information for ONLY that colour. Because no
encoding or decoding takes place this is the purest form of signal.

An audio analogy would be Dolby Pro-Logic vs Dolby Digital. Dolby
Pro-Logic
has the surround and centre information encoded in with the left and
right
audio tracks and must be decoded whereas Dolby digital carries 6
discrete
audio channels. Because each channel is discrete there is no
"contamination"
>from

For more info read an article I wrote some time ago
http://www.kat5.tv/videoformats.html

One further point, if the colours are brighter then either the RGB
settings
were too low or you have the colour setting way too high for the
Component
input. That can make things look grainy due to saturation of some of the
circuitry. RGB will definately be the best.

Is there a reason why you didnt consider the RGB to Plasma converter and
it
is specifically designed to connect RGB signals to the VGA input on a
Plasma
screen and as VGA is an RGB signal you should get exactly the same
quality
but still leave your Composite input available which I believe was your
original reason for changing to component. Maybe John would take the
Component Converter back in exchange for a Plasma Converter.

To re-iterate, the fact that the picture is worse than RGB is not a
reflection on the Component converter but is due to the fact that
Component
is a lower quality standard than RGB.

Hope that helps

Keith

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


> -----Original Message-----
> From: Rob Mouser [mailto:rmouser@xxxxxxx]
> Sent: 23 July 2003 22:58
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] RGB to Component. Ohh Eck.
>
>
> Have you every heard the expression "If it aint broke don't fix
it!"?
>
> Well as part of the biggest Node '0' rebuild in living
> history (Well my
> history anyway.) I decided I would splash out on a RGB to Component
> Converter by JS Technology from Letsautomate
> (http://www.letsautomate.com/10895.cfm?)
as it seems to get rave
> reviews. I've used it between my Tivo and plasma which
> previously ran on
> RGB (Synch on Composite).
>
> Well all connected up, and.............
>
> The picture was worse! The colours are certainly MUCH brighter but the
> picture is really grainy, much worse than it was with RGB. I
> emailed the
> manufacturer and he just replied "You are getting more signal,
adjust
> the sharpness setting on your plasma".
>
> Well I've tried that but the picture is still poor.
>
> Any one got any clues? Anyone else got the unit?
>
> Ho hum!
>
>
>
> Many thanks
>
>
>
> Rob
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
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