I was able to packetize a jpeg file, send it using RTTY encoded audio, and decode using dl-fldigi to reconstruct the picture – \u00a0with a 33% error rate.<\/p>\n
Details:<\/p>\n
Encode jpeg file (note: file should be fairly small with dimensions that are multiples of 16)\u00a0Using fsphil’s SSDV software:<\/p>\n
.\/ssdv -e -c KA1IS -i 1 24.jpeg test1.pkt<\/pre>\ndecode:<\/p>\n
.\/ssdv -d test1.pkt test3.jpeg<\/pre>\nRTTY:<\/p>\n
Currently using multimode to encode and dl-fldigi to decode. dl-fldigi is the only software that internally supports the SSDV packets.<\/p>\n
To get any results, RTTY must be at ascii, 8 bits, no parity, 2 stop bits. The other settings I will need to tweak for maximum throughput, but with this simple setup the error rate was way too high. Especially considering there was no radio involved.<\/p>\n
Any way it sort of works<\/p>\n
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I was able to packetize a jpeg file, send it using RTTY encoded audio, and decode using dl-fldigi to reconstruct the picture – \u00a0with a 33% error rate. Details: Encode jpeg file (note: file should be fairly small with dimensions that are multiples of 16)\u00a0Using fsphil’s SSDV software: .\/ssdv -e -c KA1IS -i 1 24.jpeg … <\/p>\n