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"ghosting" on freeview picture quality



 
 
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  #1  
Old September 10th 07, 02:33 PM posted to uk.tech.digital-tv
tonyjeffs
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Posts: 2
Default "ghosting" on freeview picture quality

Our reception on one freeview has three large ghosting type vertical
bands on the left of the screen.
Another freeview box has a slight fuziness to large blocks of a single
colour in the picture.
A third is perfect.

I didn't think the above types of distortion were possible with a
digital signal. - I thought any distortion would be big squares of
pixellation or blocking as seen on Sky sometimes, sort of all-or-
nothing

Can anyone explain this?

Thanks

tony

  #2  
Old September 10th 07, 02:41 PM posted to uk.tech.digital-tv
Paul D.Smith
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Posts: 785
Default "ghosting" on freeview picture quality

Are they all SCART attached and have you tried removing all other boxes that
might be attached (VCR, PVR, DVD player etc)?

Paul DS


  #3  
Old September 10th 07, 02:59 PM posted to uk.tech.digital-tv
Dr Zoidberg
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Posts: 144
Default "ghosting" on freeview picture quality

tonyjeffs wrote:
Our reception on one freeview has three large ghosting type vertical
bands on the left of the screen.
Another freeview box has a slight fuziness to large blocks of a single
colour in the picture.
A third is perfect.

I didn't think the above types of distortion were possible with a
digital signal. - I thought any distortion would be big squares of
pixellation or blocking as seen on Sky sometimes, sort of all-or-
nothing

Can anyone explain this?

The ghosting is being introduced on the analogue connection from your STB to
the TV

--
Alex

"I laugh in the face of danger. Then I hide until it goes away"

www.drzoidberg.co.uk www.ebayfaq.co.uk


  #4  
Old September 10th 07, 06:35 PM posted to uk.tech.digital-tv
the dog from that film you saw[_2_]
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Posts: 423
Default "ghosting" on freeview picture quality


"tonyjeffs" wrote in message
oups.com...
Our reception on one freeview has three large ghosting type vertical
bands on the left of the screen.
Another freeview box has a slight fuziness to large blocks of a single
colour in the picture.
A third is perfect.

I didn't think the above types of distortion were possible with a
digital signal. - I thought any distortion would be big squares of
pixellation or blocking as seen on Sky sometimes, sort of all-or-
nothing

Can anyone explain this?




it's something happening between the box and your tv - maybe a crappy scart
lead, maybe the same for your tv scart socket. - or indeed the scart out of
the digibox.



--
Gareth.

That fly... is your magic wand.
http://www.last.fm/user/dsbmusic/


  #5  
Old September 11th 07, 11:41 AM posted to uk.tech.digital-tv
Roger Wilmut
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Posts: 143
Default "ghosting" on freeview picture quality

In article .com,
tonyjeffs wrote:

Our reception on one freeview has three large ghosting type vertical
bands on the left of the screen.
Another freeview box has a slight fuziness to large blocks of a single
colour in the picture.
A third is perfect.

I didn't think the above types of distortion were possible with a
digital signal. - I thought any distortion would be big squares of
pixellation or blocking as seen on Sky sometimes, sort of all-or-
nothing

Can anyone explain this?

Thanks

tony

Some TVs give breakthrough from their analogue tuner to the SCART
input. Try selecting a channel with nothing tuned on it (if the set
will let you do this) before switching to the SCART.
  #6  
Old September 12th 07, 09:38 AM posted to uk.tech.digital-tv
tonyjeffs
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Posts: 2
Default "ghosting" on freeview picture quality



Thanks
So the problem must be downstream of the freeview box.

I remembered something equivalent:
Our previous tv must have had analog breakthrough - Sky reception was
perfect via scart, but degraded if I plugged the tv ariel cable into
the back of the set at the same time. I partially solved it by
putting an attenuator between the ariel cable and the tv socket..

In this current case, there are no other devices attached to the tv,
so it could be the tv itself. The ghosting is very light, and is hard
to see unless the background is ideal.

I'll try a different scart lead.

Thanks
Tony

 




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