Hi,
Briefly - the SSTV developers have their own algorithms more-or-less, what we are mostly interested in is the frequency at a point in time. Simplifying things further - we need to know frequency for each point in the line, the filtering we use to pre-process the incoming signal removes noise etc. After all - it's an analogue specification.
There would be no advantage to sampling at 48kHz instead of 8kHz, in fact it would use a lot more CPU to run the filters.
The filtering we use is very standard stuff, SSTV is a nice and simple concept, the big problem is combating noise, fading and multi-path interference.
Simon Brown, HB9DRV www.ham-radio-deluxe.com
----- Original Message ----- From: "Curt Nixon" cptcurt@flash.net
I wasn't so interested in the actual SSTV algorithms as I was in seeing if there is any visible difference in the result of different algorithm use--or is everyone using the same decoding kernel?