In article , David Looser
scribeth thus
"tony sayer" wrote in message
...
In article , David Looser
scribeth thus
"tony sayer" wrote in message
...

Well the number of the bits and the way you use them do affect the
quality of both Sound and Vision;!..
--

Indeed, but it's not necessarily the case that it's "more bits the
better".
Some recent digital cameras with high "megapixel counts" produce poorer
pictures than older ones with fewer megapixels.

Why do you think that is?..

Lens quality, imager quality, DSP algorithm quality......But whilst the
megapixel count is mentioned in characters a foot high in the ads, the lens
is hardly mentioned, and the other two not at all. Not surprisingly the
public tend to get the idea that megapixels is all that matters.

Yes .. Oddly enough my 8 M/pixel produces worse pix than the old 3.5
one!..

And isn't that wonderful compared with the wife's ancient Canon..


In digital audio systems a lot is dependent on the codec in use and MP 2
which is what DAB uses wasn't designed for use at 112K or so whereas
AAC was!..
--

Indeed. Back in the early '90s I was employed in professional comparative
listening tests of low bit rate (8 - 9.6kb/s) voice codecs. The differences
between them were marked, but that didn't necessarily make it easy to pick a
"best". One might produce the most natural speech when there were no errors
in the bit stream, whilst another might cope far better under high
error-rate conditions. It could also depend on voices, tests were carried
out with a variety of languages (using appropriate listening test panels) to
avoid "language bias". So yes, I do know a bit about listening tests and
codec dependency!

You went involved in the MP2 codec tests for the development of DAB?..

David.



--
Tony Sayer