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From Wikipedia:
Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color.
A literal term for SSTV is narrowband television. Analog broadcast television requires at least 6 MHz wide channels, because it transmits 25 or 30 picture frames per second (see ITU analog broadcast standards), but SSTV usually only takes up to a maximum of 3 kHz of bandwidth. It is a much slower method of still picture transmission, usually taking from about eight seconds to a couple of minutes, depending on the mode used, to transmit one image frame.
Since SSTV systems operate on voice frequencies, amateurs use it on shortwave (also known as HF by amateur radio operators), VHF and UHF radio.
SSTV: visuall, with extra headache!!
Although the format can transmit decent-quality color images (and encoding formats vary), it is usually a trade-off between transmission time, bandwidth, and signal integrity.
I envision this as essentially being a size-limited format (i.e. entries can only be X seconds long, or entry files can only be X megabytes large). With that limitation, the !!FUN!! is no longer just in designing the image, but making sure it's legible AND transmittable when converted to an SSTV signal!
Tools
The most comprehensive tool I've used to create SSTV broadcasts has been RX-SSTV. There are a few others, but this one I've found to be the most useful (also, super rad 90s webpage!!). It can be used to both broadcast and decode SSTV signals, although recording to a file is not supported. A virtual audio cable routed to Audacity works just fine though! The same thing with decoding: it uses a mic input. That can either be routed from your DAW of choice, playback through line-in or an ACTUAL microphone, or as mentioned before, a virtual audio cable.
This format would be a trick to set up properly, so if it gets accepted I'm pledging to create a guide on how to create an SSTV broadcast as well as decode one!
This format would give signalist points!
Any thoughts?
Slow-scan television (SSTV) is a picture transmission method, used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color.
A literal term for SSTV is narrowband television. Analog broadcast television requires at least 6 MHz wide channels, because it transmits 25 or 30 picture frames per second (see ITU analog broadcast standards), but SSTV usually only takes up to a maximum of 3 kHz of bandwidth. It is a much slower method of still picture transmission, usually taking from about eight seconds to a couple of minutes, depending on the mode used, to transmit one image frame.
Since SSTV systems operate on voice frequencies, amateurs use it on shortwave (also known as HF by amateur radio operators), VHF and UHF radio.
SSTV: visuall, with extra headache!!
Although the format can transmit decent-quality color images (and encoding formats vary), it is usually a trade-off between transmission time, bandwidth, and signal integrity.
I envision this as essentially being a size-limited format (i.e. entries can only be X seconds long, or entry files can only be X megabytes large). With that limitation, the !!FUN!! is no longer just in designing the image, but making sure it's legible AND transmittable when converted to an SSTV signal!
Tools
The most comprehensive tool I've used to create SSTV broadcasts has been RX-SSTV. There are a few others, but this one I've found to be the most useful (also, super rad 90s webpage!!). It can be used to both broadcast and decode SSTV signals, although recording to a file is not supported. A virtual audio cable routed to Audacity works just fine though! The same thing with decoding: it uses a mic input. That can either be routed from your DAW of choice, playback through line-in or an ACTUAL microphone, or as mentioned before, a virtual audio cable.
This format would be a trick to set up properly, so if it gets accepted I'm pledging to create a guide on how to create an SSTV broadcast as well as decode one!
This format would give signalist points!
Any thoughts?
