RE: re Digital TV !!!OFF TOPIC!!!

["Don McAllister" <donmc@xxxxxxx>]

As an aside, I reconnected my Cable set top box (Telewest) last night as
I kept it for free to Air stations after going over to SKY. I did some
direct comparisons to Sky last night whilst watching "Jerry
Maguire" on
C4. I have to admit the improvement in quality on the cable box over Sky
was extremely pronounced. The colours seemed more vivid and Sky seemed
to have a "cast" over the picture. In addition, the pixilation
and
banding over walls etc was hardly noticeable on the cable box but really
distracting on Sky - simmering away like mad. I must admit, when I first
went over to Sky I though the picture quality was better but I didn't do
a direct comparison. Perhaps I caught C4 on a bad night on Sky !

Bummer!

Don


> -----Original Message-----
> From: Andy Laurence [mailto:andylaurence@xxxxxxx]
> Sent: 21 January 2002 09:19
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] re Digital TV !!!OFF TOPIC!!!
>
> > True. Digital Terrestrial is CAPABLE of really high quality.
> > False. Digital Terrestrial currently gives a superior picture to
> analogue.
>
> ... ultimately.  It depends on how good the signal is in your area I
> expect.
> I get a *much* better picture with digital and as such never use
analogue.
>
> > Because most of the UHF spectrum is taken up with High Power
> transmitters
> > for the 4 main analogue channels (note Channel 5 is also very low
power
> in
> > many areas), they have only been able to allocate 6 frequencies
(or
> MUXES)
> > to each transmitter area for the digital transmissions.
> >
> > In a vain attempt to give viewers access to extra channels of
crap,
the
> > amount of bandwidth assigned to the channels is mostly inadequate
for a
> > decent quality picture so even fairly minor changes in a picture
can
> result
> > in pixelisation of the image.
>
> I only notice pixellation on dark scenes.
>
> > Another side effect of the extra compression is that the reduced
data
> rate
> > leaves little room  for error correction and because of the
limited
> > information transmitted in the first place, the slightest
interference
> will
> > cause horrendous breakup in picture and sound.
>
> I have to say that the aerial/leads are very important.  I have a
shared
> aerial (until I finally move into my new house), and rarely get to
watch
> channels 31-37.  Reception is normally fine in summer though.
>
> Andy
> --
> PC-Based Multimedia System
> http://www.andylaurence.pwp.blueyonder.co.uk/pcbmms
>
>
>
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