> This fails even at the FRAND level because you're not "allowed" to implement it in open source software.

The same conditions apply to everyone: they do not discriminate—the ND in FRAND—open versus closed source. Everyone gets the same contract/NDA to sign.

If there was one contract/NDA for closed source, and another for open source, that would be discriminatory.

From the article:

> At this time an open source HDMI 2.1 implementation is not possible without running afoul of the HDMI Forum requirements.

I wonder on what basis. Perhaps an obligation to ensure the software resists reverse-engineering?