I currently have a Yamaha RX-V377 5.1 amp. I want to update to a 4k tv, and my current amplifier has only 4 hdmi 1.4 in and 1 out. Do I need to upgrade to HDCP 2.2 to get 4k video and audio? I have a cable box, nvidia shield tv, and apple tv plugged into the amp now and would like to stream 4k content from these. Any help or suggestions would be greatly appreciated.