Real-Time Ad Blocking via HDMI Man-in-the-Middle

Cyril Engmann

You bought the TV, and you pay for the subscription – so why do you still get ads? Modern streaming ads are baked into the stream as the content, out of reach of any network hacks. Minus is a small device that sits between your streaming box and your television and does the blocking in hardware, with no cloud dependency, using open models running on a single-board computer. It intercepts the signal between a streaming stick and the TV and goes after ads on the screen itself. This talk offers a hands-on look at the hardware and ML detection pipeline, and a broader case for the right to control what plays on a device you own.

Sunday 1700 Gramercy Park Suite


Cyril Engmann is a hardware and embedded systems engineer based in Brooklyn, where he runs The Garage Agency, a boutique shop specializing in early-stage product development for hardware startups. His work spans custom PCB design, firmware, cybersecurity, and Linux platform engineering. He builds things that shouldn’t exist yet, then writes about how they came to.