HDR: Projector Compatibilty Issues
Some Troubleshooting Tips
If you've confirmed that your projector and video source are compatible according to the manufacturer's test results or by matching specifications, but you're still not getting a 4K HDR image--or aren't sure if you are--here are some troubleshooting steps to try.
Make sure all of your devices are updated with the latest firmware.
Check to see if the projector recognizes the input as 4K HDR:
- For Epson models: Choose the Menu's Info option. If the projector recognizes the input as an HDR signal, the Color Format entry should show the color space and the text HDR, with a number from 1 to 4 to indicate the HDR mode.
- For JVC models: Go to the menu's Input tab. It should show the resolution as 3840x2160, the color as either 10 bit or 12 bit, and HDR as Yes.
- For Sony models: With the latest firmware at this writing, the Information Menu will show HDR if the projector detects HDR content. (Some models will not show this with older firmware.)
If your projector is indicating that it is receiving 4K HDR input and you don't see the effect, try making the room as dark as possible. Keep in mind that ambient light will wash out dark areas to reduce contrast ratio and hide much of HDR's advantage.
If your hardware has more than one HDMI port and they're not all HDMI 2.0a, make sure the cable is connected to an HDMI 2.0a port.
Make sure your HDMI cable can handle the bandwidth. Most standard HDMI cables are not UHD certified.
Make sure you're following the projector manufacturer's setting recommendations, if any, for HDR content.
Epson offers a FAQ here.
In addition, Epson recommends using the Bright Cinema setting for HDR content in most lighting conditions. It also says that with the current firmware at this writing, and the default setting of Auto for Dynamic Range, the projector uses its HDR 2 mode with HDR input. However, you should also experiment with manually changing the setting to HDR 1, HDR 3, and HDR 4. To change the setting, choose Signal, Advanced, Dynamic range, and then pick the setting you want.
HDR 2 is the default because Epson considers it the choice most people will prefer with most lighting conditions. HDR 1 gives a brighter image, which you might prefer in a room with more ambient light. HDR 3 and 4 give a darker image, which might be your preference in darker rooms. Of the four choices, HDR 4 is actually closest to the HDR10 specification according to Epson, but in our experience it is too dark even in a dark room with a small screen.
The disadvantage of setting HDR to one of its alternative modes with Epson's current firmware is that the projectors will then use that mode for all input signals, including SDR content, which messes up SDR image color and contrast. To avoid that happening, you need to manually switch the Dynamic Range setting back and forth between Auto and HDR 1, 3, or 4 as needed. Epson is also planning a firmware update that will let you change the HDR mode for the Auto setting to be any of the HDR modes. Once you change the HDR setting for Auto to user, you won't need to change the Dynamic Range setting manually when switching between HDR and SDR input.
JVC's recommendations are available here.
Sony doesn't have instructions online, but says their projectors need HDR set to Auto (the preferred setting) or On. With the latest firmware for all Sony projectors at this writing, the projector will detect the color space actually being used. If it detects BT.2020 in the data stream (as distinct from what the header says), it will automatically switch to it with no option to change the Color Space setting. Otherwise, it will use the current setting for Color Space, but you can manually change it by going to the Picture Menu, choosing Expert Setting, and then Color Space.
Sony says this is needed to give you better color quality with early HDR discs, many of which include a header indicating that they're using BT.2020 but were created from files using Rec.709 without adjusting the color values. The new firmware also lets you change the average picture brightness when viewing HDR content. You can adjust it to taste with the HDR Contrast setting in the Picture Menu.
|Contents:||Intro||Projector HDR Compatibility||Spec Matching||Troubleshooting Tips|