By design, if any link in the signal chain doesn’t support HDCP 2.2, the delivery device will automatically reduce a 2160p video stream to 1080p. The current version that 4K Ultra HD Blu-ray discs use is HDCP 2.2. If I’d read the info carefully, (I don’t as part of usability testing), then I’d have known that the mCable with its processor is a link in the HDCP (High-bandwidth Digital Content Protection) scheme that’s intended to foil pirates, and that it’s limited to HDCP 1.4. I was all set to simply leave the mCable in place when I finally tossed in a copy-protected Ultra Blu-ray disc to further test the claim that 4K UHD (2160p) was simply passed through. This table shows is what happens when the mCable outputs video in various to a Full HD (1080p) TV. Below is what happens when output to a 1080p TV. This is what happens when the mCable outputs video at various resolutions to a 4K Ultra HD TV.Ībove is the table for what the mCable does with various resolutions of video output to a 4K UHD TV.