From one simple interface, your Roku TV provides access to virtually all your entertainment sources such as a game console, cable box, antenna or streaming channels like Netflix and YouTube. Among the sources you may want to connect are devices that produce a 4K (4K Ultra HD) or 4K HDR (4K High Dynamic Range) video signal, such as an Ultra HD Blu-ray™ player.
What is HDMI?
HDMI, or High-Definition Multimedia Interface® is the standard for connecting video and audio equipment. With a single cable, HDMI can deliver both the audio and video signals.
While the physical connectors remain unchanged, the HDMI standard continues to evolve as technology advances. Each version increases the audio and video capabilities, while maintaining support for advancements made in previous versions. Today, most devices take advantage of the elements of version 1.4 or version 2.0.
What is the difference between HDMI 1.4 and HDMI 2.0?
Already having support for high definition (HD) resolutions such as 720p, 1080i, and 1080p, the HDMI standard evolved when version 1.4 added support for basic 4K video. Following this advancement, the available bandwidth significantly increased for version 2.0 allowing it to improve upon 4K support with higher refresh rates, more color information, and support for HDR content.
Refresh rates are expressed in values like “25Hz” or “30Hz” which tells you how many times per second your TV screen refreshes, or redraws the image. The higher the number, the smoother and more realistic the picture appears. HDMI 1.4 supports 4K video at a maximum refresh rate of 30Hz while HDMI 2.0 adds support for higher refresh rates like 50Hz and 60Hz.
Devices that are only able to output HD resolutions such as cable or satellite boxes, generally only support elements of HDMI 1.4, while devices that output 4K and 4K HDR support elements of both HDMI 1.4 and HDMI 2.0. Correctly configuring the HDMI mode on your Roku TV helps ensure your devices output the correct 4K or 4K HDR image.
How do I configure the HDMI mode?
The HDMI mode can be configured independently for each HDMI input on your Roku TV to match the capabilities of each device.
Note: The HDMI mode can only be configured on 4K and 4K HDR Roku TV models.
- Press the Home button on your Roku TV remote to go to the main screen.
- Scroll up or down and select Settings.
- Select TV inputs.
- Choose the device or the HDMI input under Inputs being used.
- Note: If the HDMI input is not used, choose Set up input and add it to your home screen.
- Select HDMI mode and choose one of the following.
- Auto – Let your Roku TV try and determine the best setting. Use this option unless the picture is displayed incorrectly or you know the HDMI version the device supports.
- HDMI 1.4 – Compatible with devices designed to use elements of version 1.4, including support of all HD resolutions and limited 4K support at a maximum refresh rate of 30Hz. Most HDMI devices will display correctly in this mode, but you may not get an optimal 4K picture.
- HDMI 2.0 – Compatible with devices designed to use elements of version 2.0, including support of all HD resolutions and 4K support at a maximum refresh rate of 60 Hz. If you do not see an HDR image using Auto, try using this HDMI mode to view HDR content.
- Older HDMI devices may not display the picture correctly when the HDMI mode is set to HDMI 2.0.
- If you have a 4K or 4K HDR device connected to your Roku TV, we recommend you use Auto or HDMI 2.0.
What if the picture is blank or displays incorrectly after changing the HDMI mode?
If the picture is blank or not displayed correctly when switching your Roku TV to the input used by the device, the chosen HDMI mode is likely incompatible.
To recover, press the Home button on your remote to return to the main screen which will display properly. From the main screen, repeat the steps outlined above and choose a different HDMI mode for the input used by the device.