"Martin Schöön" wrote in message
news

On Fri, 20 Jan 2006 16:56:11 +0000, Serge Auckland wrote:
snip
When there was the 199? Football World Cup in France, I sold France
Telecom
a large number of automatic audio test meters so FT could test the 400+
ISDN
codecs they bought to provide audio feeds to the world's broadcasters.
These
ISDN codecs were being used on MP2 at 128kbps (pretty much as DAB is in
the
UK). Using spot frequencies, all tests were fine, as was audio quality
(mostly speech). but as soon as the automated sweep went through, the
frequency response had so many anomalies as to be meaningless. FT solemly
carried out the tests, failed every codec, but used them anyway....aren't
the French wonderful?........
Maybe they didn't plan on broadcasting frequency sweeps anyway.
:-)
/Martin
Quite right, but what amused me at the time is the way that they ran the
sweeps through all 400 odd codecs, and reported them all as having failed,
but clearly, as the sweep test was a nonsense, were happy to use them. It
made me wonder why they bothered to run a sweep test, but the spec said they
had to.........
S.