Re: Jazz FM goes national mono on dab only

On Sep 8, 5:30 pm, hwh <iimeel...@xxxxxxxxxxxxxxxxxxx> wrote:
On 9/7/11 11:22 PM, Richard Evans wrote:

hwh wrote:
On 9/7/11 8:31 PM, Juan wrote:
En/na Kulin Remailer ha escrit:
A radio station broadcasting at 80kbps in mono must sound equal to a
station broadcasting at 160kbps Stereo. The only difference would be
stereo which enhances the sound.

No. DAB does not use separate left and right channels. To save bits they
use mono with a bit of side information.

Not exactly true, the lower frequencies are discrete stereo, while the
higher frequencies are intensity stereo, effectively mono with a
parameter for each sub band to define how far to the left or to the
right that sub band should be.

Yes well, I tried to explain it in terms that the average listener could
understand.
In short: it is fake stereo, just like those sixties records for which
only a mono recording was available.

It's not _that_ bad!!!

But it can only pan each frequency band to one location. This is
usually audibly different from the original signal, at least when
there's something present in more than one location in the stereo
sound stage (e.g. something on the left + something on the right).
It's more or less perfect for studio-based stereo speech programmes
where only one person talks at once, and pretty awful for most music.

Cheers,
David.
.

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