[Elecraft] K3 Questions

[David Woolley]

Corboy-Poteet wrote:
> David. let me pose a question: if you converted the digitized voice
> signal to mp3 or ogg format, is this similar to (or the same as) a

I don't know the fine details of ogg, but mp3 is certainly frequency 
domain, and I think ogg will be the same.

mp3 is fairly complicated, and designed for music, which is more 
demanding that speech.  It basically works by noting that the ear cannot 
detect weak sounds close in frequency to strong ones (the K2 is a bad 
ear!) and therefore doesn't bother encoding those weak frequencies, but 
in the end, everything is coded as the spectrum not the time domain 
signal.  (This is very simplified, because I cannot remember the fine 
details).

> freq domain data stream?  The data compression from CD wav file to mp3
> is around 10 to 1; you are certainly not storing a digital copy of the

Actually, that's the compression used to try and match CD quality.  For 
speech, you can get away with about 16kbs (good enough for mono language 
practice; if I remember correctly, the codec will go down to 8kbps).


-- 
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.