Classic Slow Scan Television (SSTV) Demonstration

[anoori9000]

this is a lie, i recorded it its nothing. i did the sstv signal

[NoDisslike]

Very nice! the only problem is that there's no space between the pics!

[5UP7]

@gamax92 VIS codes had not been developed and were not used when the 8-second BW mode was in vogue. However, frame sequential RGB color using 8-second frames may use VIS codes of 1, 2, and 3 preceding R, G, and B frames respectively.

15 lines are transmitted each second followed by a 5 ms sync pulse (at 1200 Hz), yielding a video line length of 61.6666 ms. Divide this number by the number of pixels you have to send per line, and follow it with 5 ms of 1200 Hz horizontal sync.

[starmagstarmag]

Hi! I'm an artist based in London. I'm really interested in converting images to sound, and then assimilating them as images again. Could you please tell me if there is a way of transmitting an image from one laptop to another, across a gallery, using sound, during a live performance please? How would I even start investigating this? Thanks for uploading! hope you can help me. Jon

[5UP7]

@starmagstarmag Sorry to say, but this would never work with all the extraneous sounds and reverberation present in the room. :-(

[starmagstarmag]

@5UP7 Thank you for getting back to me. Do you know how I would convert a b&w image into sound and then reassimilate it as an image again? It doesnt necessarily have to be across a room. Can you direct me to a website please that would explain how to do this? i love the noise, and the images!! I think it is really really interesting.....and what would happen with the extraneous sounds and reverberation? would it simply not work at all? or would it interfere with the image? sorry to pester you!

[5UP7]

@starmagstarmag At a very fundamental levels, fax machines convert pictures to sound (so they can travel over telephone lines), and back to pictures again.

However, it would be more practical to use slow-scan television or facsimile software running on a PC with a sound card to perform this function.

> and what would happen with the extraneous sounds and reverberation? would it

> simply not work at all? or would it interfere with the image?

Probably both (total disaster).

[Aqlor]

@starmagstarmag that would be possible with error correcting codes, most of communications channels we use nowadays have noise,so codes have been developed so this can be corrected on the fly(think all the noise that is on the wifi and cellphone frequencies). You should use a different format for the images, unless you want to see it working "on the fly" as error correcting codes would require more information to be transmited.

[bben95]

@starmagstarmag i think you could do it if you used radio

[MaryStewart]

nifty!  musical and text sounds like barber clippers!

[TheChickenrun3]

is this alien audio porn?

[SuperTechieJ]

Fascinating.

There's a piece of software for Mac called MultiScan - it does the same thing for HAM radios.

[Mylenthes]

It comes out diagnol for me

[Jarkkoreviews1]

pause at 0:53

and 1:25

and 1:33

[Jack14112]

very cool

[ipaqmaster]

it may be 120x120 pixels but its still more HD than minecraft =P

[Rebel056]

at 0:27 (Grey) it sounds like boo from mario games

[camperian04]

@Rebel056 well now you know it was a SSTV color image XD

[SNESIvan]

This is B/W what?

[ipaqmaster]

@SNESIvan B/W 8 =)

[philipacentaur]

Cool. In what language did you write this software, and is there any chance of you sharing the code?

[5UP7]

@philipacentaur This was written in 'C' under Linux. There is no plan to release it at the present time since it is still a "work in progress". However, I recently completed some new hardware, and expect to generate some companion software to permit the generation of more SSTV video clips from my audio tape archive that goes back over 30 years. :-)

[philipacentaur]

@5UP7 And here I was, hoping that 'C' under Linux was the answer to that part of my question. Anyway, great stuff and thanks for sharing.

[5UP7]

@philipacentaur This was done using a combination of several small programs and scripts that I hobbled together rather quickly. Certainly nothing really polished or formal. The software that generated the SSTV audio, however, may get released some day as it may actually serve a useful purpose to a general population. Currently, I am using it to provide test signals to my homebrew SSTV demodulator and video scan converter, and it works rather well.

[NGBatNICdotMIL]

@5UP7 what prog do u use?

[rockcabbage]

So is there any possible, simple way to input an image in a computer program and have it translated to a SSTV "Song"?

[italicus84]

@rockcabbage MMSSTV does that. Simply record the wave audio with audacity while the program is playing the image. it works perfectly.

[Filmer1eX]

@italicus84 Or get MMV2WAV from the same site you got MMSSTV :) Can convert the mmv files recorded by mmsstv itself to wav and that way eliminate any possible artifacts caused by stereomix or whatever. I used that "audacity record and save" method too before I found this.

[picaticatara]

I liked the part where there was an annoying beeping sound.

[JackBond1234]

I wish I could do that, but my stupid USB headphones overrun any sound input capability for my whole computer unless it's going into the built in microphone. Useless.

[RagsTTiger]

MMSSTV wil decode this.

I started doing SSTV with a ROBOT hardware unit. We would save tones on a cassette, otherwise you only got one look, as the image disappeared off the screen.

Another classic TV mode check out NBTV. There are some example clips here on YouTube.

Now, with sound card software pictures on HF have post card quality.

[kargaroc386]

and MMSSTV can't decode this.

[robinheil]

lol Mr. Bean

[Ihaveapsp]

this is soooo cool, i was syncing the audio with MMSSTV and it actually works :D

[CptainDaniel]

0:43 scared the fuck out of me

[JimmyUnlimit3d]

@CptainDaniel me too haha

[elendless]

ok i shant see this anymore, play this and do not see it and see what i mean

[AcousticMinja]

SCIENCE

[breadtruck1978]

Fascinating.

Thanks to the video game "Portal," I am looking into what this is. Very neat.

[KoiKamiMauro]

Me as well.

[Hikikomorisama]

yeah same here, i heard about this but back then i thought it was usless. not anymore.

[dude195]

@breadtruck1978 Hehe. same here.

[AMFxCful]

@breadtruck1978 same

[psp3602]

@breadtruck1978 yeah me too

[MrUbister]

@breadtruck1978 OMG ME 2!!! XD

[raccoonnyc]

Very Clever.

[K7AGE]

Very cool, I remember watching this mode on old home built display. I was able to get MMSSTV to decode the audio from the video! Randy

[tribalmasters]

My MMSSTV decoded it but it was all slanted! I need to make some adjustments!!

[Amishman35]

On my PSP SSTV decoder, it slants from right to left going down, at about a 120 degree angle. I calibrated it to MMSSTV, which I calibrated to WWV.

[TheSwillMan]

Hah, Rowan Atkinson.