When it comes to regular video material, it is very difficult to distinguish any quality differences between the 4:4:4 and 4:2:0 formats.
Almost all TV programs today are encoded 4:2:0 and 8 bits/pixel before being transmitted via Terrestrial, Cable or Satellite and Internet streaming. The savings are evident. For example, 4K UHD 4:4:4 8 bit/pix at 60 F/s requires 12 Gb/s data rate. In contrast, 4K UHD 4:2:0 8 bit/pix at 60 F/s requires 6 Gb/s data rate. For a change that is difficult to see on the TV screen, that is a reduction by two.
A table below shows that HDBaseT can support 4K UHD 4:2:0 8 bit/pixel at 60 F/s, which is the most widely used digital connectivity format over twisted pair today.
The HDMI 2.0 specification supports 4K UHD 4:2:0 8 bit/pixel at 60 frames per second as shown in the table below, where Black represents HDMI 1.4 and Orange represents HDMI 2.0.
Based on articles By Mike Tsinberg