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Dynamics and level compression - FM vs DAB



 
 
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Old September 11th 08, 09:53 AM posted to uk.rec.audio
tony sayer
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Posts: 2,042
Default Dynamics and level compression - FM vs DAB

In article , Jim Lesurf
scribeth thus
I have now put up a page that compares the dynamics and level compression
on FM with that on DAB. The page can be found at

http://www.audiomisc.co.uk/HFN/DABvs...ewithlike.html

This is an updated and expanded version of a short item that was published
in HFN. The results are broadly similar to the comparisons of FM with DTTV,
but I have been able to give more details of the level compression
behaviour. I've also covered BBC R1/4 as well as R3.

Slainte,

Jim


And from that I quote;!...

"However around the start of the Proms in 2006 i.e. after I’d written
the original article the BBC suddenly reduced the bitrate on R3 to 160
Kbps. The result was quite dire, and prompted a great deal of angry
complaints. Particularly because for most of the time the BBC were using
the ‘stolen’ bitrate to run a rolling trailer for a station that wasn't
on-air! One consequence was that the first weeks of Prom broadcasts on
DAB that year sounded awful. After initially trying to dismiss the
criticisms and pretend that the sound quality hadn't suffered, the BBC
finally relented and R3 on DAB reverted to mainly using 192 Kbps".

Good old auntie!, shows how deaf the poor old soul is getting and her
attitude to sound quality. Perhaps her ear trumpet needs blowing out?.

You'd think the old dear could use the greater bandwidth on satellite
but she is a stubborn old bitch..

Meanwhile over in Jerryland they use 192 on satellite for mere talk
stations preferring 256 or even on Bayern 4 320 K/bits

Now thats what I call digital quality)

You ought to treat yourself to a digital satellite system Jim there're
sod all money now!. Most all have a SPDIF out for connection to an
external DAC....

--
Tony Sayer

 




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