DIGI SSTV is a way to send already compressed picture format to help no degrade the quality even more using traditional analog SSTV methods
some modes that offer DIGI SSTV is PSK63F and PSK220F in software called MultiPSK other software that offer this mode is called Easy Pal You can find a list of program in the Digital Mode Software page.
+Picture Quality is much better not as much static lines in the images
+pretty fast mode
Mode Audio Sample