[Gllug] TV ExpressCard/USB - any recommendations/avoids?

[Chris Bell]

On Tue 17 Nov, Christopher Mocock wrote:
> 
> t.clarke wrote:
> > I have to say honestly that whilst an HD picture is very good it is not
> > '5 times more detail' than an SD picture as touted by the vendors!!
> 
> 1080p HD is approximately 2 million pixels, as opposed to about 400,000 
> pixels for SD, so it really is about 5 times the resolution. Granted it 
> may not appear 5 times better to the viewer, but there's only so much 
> detail that the human eye will consciously notice. As you rightly 
> pointed out, the compression will play a part in this.
> 

   I saw something about Crystal Palace transmitters being on low power
during the changeover period, and some DVB receivers see fewer channels at
present. Most receivers have upgradeable software, so a change to a
different flavour of DVB may be possible, although I suspect that some are
struggling with low memory resources. Some of the problems with compression
are patterning on fine detail, and break-up on movement. Compression is
normally done as late in the transmission chain as possible, so it may be
possible to get different problems from different transmitters.

-- 
Chris Bell www.chrisbell.org.uk (was www.overview.demon.co.uk)
Microsoft sells you Windows ... Linux gives you the whole house.

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