On 24/02/2015 16:57, gareth wrote:
"Iain Young, G7III" wrote in message
...
On 24/02/15 12:47, gareth wrote:

What is the point of digital voice when there are already AM, SSB
and FM for those who want to appear indistinguishable from CBers?

Technical developments of new encoding techniques that reduce required
bandwidth, just as SSB improved over AM. You can get CODEC2 down to
way less than an SSB signal quite easily.

Those who subscribe to these digital voice apparatuses lack a single clue
about any underlying technical development

Sweeping statement.

I have used digital voice and I have built my own kit (non-ham but
basically the same as a digital voice front end) and wrote my own codecs
(both fractal lossy and various lossless codecs).
If you have trouble sleeping at night I am sure I can dig out my
dissertation and forward it. The technology is dated (I built my first
one using thick-film technology - that dates it a little) but the
underlying work is still valid.

Andy