Your SHIELD TV supports 4K Ultra HD (3840 x 2160p) resolution content when available from the applications of your choice.
To ensure that your SHIELD TV is optimized for 4K video output, keep your device updated with the latest system software.
Watching 4K content from SHIELD TV requires a 4K display with HDMI 2.0 and HDCP 2.2 support. Make sure SHIELD TV is connected to an HDMI input that supports HDCP 2.2. Consult your 4K display's user guide to find the correct HDMI port to plug SHIELD TV into for watching 4K content.
NOTE Most 4K streaming content requires HDCP
2.2 compatible ports. See your 4K display's user guide for further
details.
SHIELD TV also supports content rendered with 4:4:4, and 4:2:0 chroma subsampling frequency ratios.
Many receivers come with HDMI-ARC, HDMI-MHL, and HDMI-UHD ports.
Consider using the HDMI-UHD port for 4K support. Some TVs by default have UHD input disabled in TV settings, so please make sure that UHD is enabled in the settings for your TV for this input.
Most HDR TVs do not have HDR output enabled by default for HDMI. To enable HDR output from SHIELD, refer to your TV owner's manual. Here are the settings for some of the common TVs:
Samsung HDR TVs: Menu > Picture > Picture Options > HDMI UHD Color > On > Restart
LG HDR TVs: Home > HDMI > Settings > Advanced > Picture > HDMI ULTRA DEEP COLOR > On > Restart
Sony HDR TVs: Home > Settings > External inputs > HDMI signal format > HDMI [select the SHIELD input] > Enhanced mode (TV will reboot)
To watch Netflix shows in 4K or HDR, you may need to upgrade your Netflix service account to the "4 screen plan." Consult Netlfix's article on their latest requirements to stream 4K or HDR content. http://help.netflix.com/en/node/42384