This looks like the relevant patent for it: https://patents.google.com/patent/US... | Hacker News

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		vitovito on July 10, 2023 \| parent \| context \| favorite \| on: A quick look back at when Microsoft made an intera... This looks like the relevant patent for it: https://patents.google.com/patent/US6281939B1/en "Method and apparatus for decoding data encoded in the horizontal overscan portion of a video signal"

Zeetah on July 10, 2023 [–]

Good job finding it. The patient calls out two other key patents.

It also describes how the data is encoded.

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