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
I’m doing some discounts on assembled devices until the end of the week, TRQ is currently out of stock but it can be backordered and I’ll built one for you.
To illustrate, I’m using some media coverage of Black Friday in France, processed through #discret11 then #avemod 
Enclosure for FFG have been ordered, kits are almost ready, going back into building the first units now 🙋‍♂️🔧📺
#glitch #glitchart #glitchartistscollective #videoart #analogvideo #diy #syntonie #truqueur
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
#Repost holographic_thought_process ・・・
#glitch #glitchart #glitchartidtcollective #analogvideo #circuitbending #discret11
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
Capture card feedback, Discret11 in the loop 
#discret11
#glitch #glitchart #glitchartistscollective #analogglitch #analogvideo #videoart #circuitbending #circuitbentvideo #syntonie
holographic_thought_process explaining his DISCRET11 to draincain and I, was way too awesome. #discret11 #crt #glitchartistcollective #holographicthroughprocess #longuestgacartistname #bluex80 #exhibition #paris #france #art #glitch #glitched #analog #analogglitch #sheglitchr #draincain
#glitch #glitchart #glitchartistscollective 
#analogvideo #videoart
#discret11 #syntonie #doshinthegiant
Finally received those missing enclosure parts!!! (been almost 2 months 😤)
Pending #avemod orders will ship next week, and devices left are now available on the webshop. #discret11 will follow, and finally TRQ/#truqueur.
Thanks for your patience 🙏 
#syntonie #diy #glitch #glitchart #glitchartistscollective #analogvideo #videoart
Revive from ashes and rise: discret11 is back #discret11 #fluxus #encryption #glitchart #glitch #circuitbending #syntonie #CRT
@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
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_AUDIOTEST_1
#glitch #glitchart #discret11 #nava #RE303
Just received russian video chips for the Discret11! I had already tested the К174УП1, which is an equivalent of the TBA970 (video amp) but I have to test the K174XA11, which should be equivalent to TDA2593 (sync extractor), the leads looks rusted though, hope they work! #chips #circuitbending #analogglitch #syntonie #discret11 #DIY
#discret11 #diy #syntonie
ミファー
#glitch #discret11 #circuitbending #trinitron


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