On 2 Dec 2013, at 23:18CET, Graham <[email protected]> wrote:
>
> You could even tailor it to letter frequencies, e.g. one short pulse for E,
> one long pulse for T, ...
>
> Ah , some sort of drifting oscillator ? the longer the 'on time' the
> more in moves
>
> would sound something like a Bird 'Chirping' could call it
> 'Chirp’ !
How about Time Encoded Speech? In one version you analyse the input waveform
segment by segment and compare each segment with a library of templates. You
then send the ID of the template which is the best match, its amplitude and its
duration. The speech waveform is reconstructed at the far endi.
John F5VLF
>
> --------------------------------------------------
> From: "Chris Trayner" <[email protected]>
> Sent: Monday, December 02, 2013 10:09 PM
> To: <[email protected]>
> Cc: "Robin Gape" <[email protected]>
> Subject: Re: LF: Article on VLF
>
> >
> > On 2013 Dec 2, at 18:31, John Rabson wrote:
> >
> >> I have received the following request from G4AEE of the Cave Radio &
> >> Electronics Group Journal editorial team:
> >>
> >> “[We wish] to include an article on what radio amateurs are doing at VLF
> >> ...
> >> Another aspect would be the likely performance of highly compressed speech.
> >
> >
> > Hey, I've got this great idea.
> > Rather than compress speech, why not render the message simpler? Rather
> > than the sounds you could just send the text, encoding the letters in some
> > way. You could turn the carrier on and off, say in short or long bursts,
> > with a group of such pulses to represent each letter.
> >
> > You could even tailor it to letter frequencies, e.g. one short pulse for E,
> > one long pulse for T, ...
> >
> > 73,
> > Chris
> > -----------------------
> > Dr Chris Trayner
> > School of Electronic & Electrical Engineering,
> > The University of Leeds,
> > Leeds LS2 9JT, United Kingdom
> > Tel: +44 113 34 32053
> > Fax: +44 113 34 32032
> >
> >
> >
> >
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