DISCRET 11

DISCRET 11: Video encryption from 1984

The circuit is based on the pirate decoder from Radio Plans magazine, 1984. This decoder permitted to watch TV shows from a quite famous French TV channel without paying, with the help of some specific ICs and some reflexion. It was based on two video delay line, a sync signal extractor and also a delayed/nondelayed line detection circuit.The original encryption working by delaying lines of the picture pseudo-randomly (with fixed delay times), Radio plan circuit was checking if the line was delayed or not, and with the 2 onboard delays, realign the lines of the picture to make it viewable. A Wikipedia page about this encryption is available (in French).

Discret11 keeps the delays, and also a quite similar sync extraction circuit as the one from the above schematic,however, the goal is to encrypt instead of decrypt, so the line detecting circuitry isn’t used. It’s replaced by frequency dividers, which divide the line frequency in subdivision, so the delayed picture appear every 2, 4, 8 lines, selectable using two rotary switches. The occurency of delayed lines can be set to random (with a circuit based on Random Gate from Yves Usson/Yusynth), in an attempt to reproduce the original encryption (a pseudo-random sequence of a length of 6 frames). The delay times, fixed on the base circuit, can be modified using potentiometers, which will delay the whole line but will also affect color the line (as the phase of the chrominance signal is delayed with the rest of the signal). A wipe between original, non delayed, signal and the delayed signal has been added. Two potentiometers adds glitch effects, with a switch to turn them off.

The project is now available assembled through the webshop.

DOCUMENTATION

User Guide
Build guide
BOM
Schematics

Enclosure

Mouser BOM (does not include screws for enclosure)

#discret11 sur Instagram

Video devices ready for distorsion. Built units and DIY kits in stock (link in bio). From left to right: #avemod #discret11 #truqueur / #trq
Same video input, various glitch flavoured outputs.
#analogvideo #videoart #glitch #glitchart #glitchartistscollective #videosynth #diysynth #videodistorsion #analogglitch #syntonie
Building some CBV001 while waiting for panels, more boards, and also more components to put kits together.  FFG and TRQ will be back in stock in about two months, will be focusing on the modules and CBV001S for now.  Still two Discret11 in stock ready to ship, not planning on building more for now so time to get one 😉  #vu001 #vu002 #vu003 #vu004 #cbv001 #truqueur #falschfarbengenerator #discret11 #glitch #glitchart #glitchartistscollective #videoart #analogvideo #videosynthesis #analogglitch #videodistortion #DIY #syntonie #eurorack #eurorackvideo #modularsynth #videosynthesis #circuitbending #crt
#Repost of @drip_cuts 
・・・
//cubicles  #analogglitch #analogvideo #glitch #glitchart #glitchartistscollective #discret11 #truqueur #syntonie
Capture card feedback, Discret11 in the loop 
#discret11
#glitch #glitchart #glitchartistscollective #analogglitch #analogvideo #videoart #circuitbending #circuitbentvideo #syntonie
Experimenting with RaspPi through new #Discret11 by holographic_thought_process at #livecinemalab spektrum_berlin … wicked machine!
Building a proof-of-concept RPi frame sampler w. cyberboy666 ! Records ~30 seconds NTSE 24bit video when GPU split is set to 128MB - with some additional #discret11 for effect. Code up on http://github.com/autr/rpi-frame-sampler #raspberrypi #openframeworks #videocircuits #videosynth
#glitch #glitchart #glitchartistscollective 
#analogvideo #videoart
#discret11 #syntonie #doshinthegiant
#Repost holographic_thought_process ・・・
#glitch #glitchart #glitchartidtcollective #analogvideo #circuitbending #discret11
Revive from ashes and rise: discret11 is back #discret11 #fluxus #encryption #glitchart #glitch #circuitbending #syntonie #CRT
Latest Discret11 revision, just in time for Brighton Modular Meet this weekend 🛸〰️📺#glitch #glitchart #glitchartistscollective #DIY #circuitbending #discret11 #syntonie
#glitch #glitchart #glitchartistcollective #analogvideo #circuitbending #discret11
Been trying to replicate Discret11 encryption used in the mid 80s by Canal+ to crypt their broadcast. Starts to look good and random enough!
#glitch #glitchart #glitchartistcollective #discret11 #encryption #crt
Discret11 CV test. Slightly better quality available on my YT channel. Process:
Discret11 glitch effect is modulated by a sample and hold, this same sample and hold is also sent to a pitch quantizer to play the synth.
#discret11 #glitch #glitchart #glitchartistcollective #DIY #circuitbending #syntonie
DISCRET11_AUDIOTEST_1
#glitch #glitchart #discret11 #nava #RE303
@polygon1993 is beta testing the circuit I'm working on for a few months now. It's based on Discret11 encryption which was used by French TV in the 80s. More to come soon!!
#glitchart #analogic #discret11 #encryption #glitch #CRT
Started modifying the Discret11 to get some glitch out of it
#glitch #discret11 #syntonie #DIY


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