ADV8005 VSPs and input timing

Hi,

I have the EVAL-ADV8005-SMZ evaluation board. I'm using an USB-to-Serial adapter with putty terminal session to communicate with the board.

In the ADV8005 Hardware Reference Manual (UG-707), in sections 1.2.1.1 and 1.2.1.3 features of both VSPs are presented. Both VSPs state they have "Input timing up to 1080p". What does this mean exactly? Does it mean that these VSPs are, for example, not able to accept input with native 4K resolutions, such as a 3840x2160 signal?

Kind regards,