I did a tear down of this Monoprice dongle: https://tomverbeure.github.io/2023/11/26/Monoprice-Blackbird....
It terminates as an HDCP 2.0 endpoint and converts to HDCP 1.4. You’d still need an HDCP 1.4 sink to make it work though.
That was written by you?
I don't agree with this section:
> The HDCP converter simply announces itself as a final video endpoint… yet still repeats the content to its output port. Without a very expensive HDMI protocol analyzer, we can’t check if the source is tagging the content as type 0 or type 1, but there is no reason now to think that it’s not type 1.
There's no magic in the HDMI protocol that says type 1 vs type 0. Its just another HDCP message over DDC, but it is only sent to repeaters. In this case, since the HDCP Repeater is lying about not being a repeater, it isn't getting sent the StreamID Type information.
Great teardown. Can these things remove HDCP altogether? It seems like if it can report that the sink is HDCP2.x then it can do so even if it has no compliance at all right? So that would mean it streams an encrypted stream to something that needs to then still do the decryption? These devices seem like they'd be underpowered to do that in real time at 18 Gb/s.
I'm using the Monoprice multiviewer. It negotiates HDCP without a display attached. Other than being a bit big and expensive, and being unable to strip HDCP, it's a good solution.
I found the same device in generic packaging on AliExpress, but haven't had the chance to order that version, yet.
There are lots of professional SDI converters and such, but they are either $3k+ or "call for price".