Picture comparison

This is the second thread I've seen about PQ and the different boxes. Interesting.

Rich

 

Are you watching a 4k content channel on the C61k ?
The 54 does not output 4k directly to a TV. Max is 1080p.

 

54 does not do 4K. C61k does. Is your display 4K? How do you have the scaling options set in each dtv receiver?

 

If you have a 4k TV, the upscaling will give you a much sharper picture than on a 1080 TV.

 

Is it a 4K TV?

Anyone know if the C61K will upscale on its own (i.e. output 4Kp60 when connected to an HD channel) or will it only output 720p/1080i when tuned to an HD channel?

 

Based on the resolutions that have been checked, you can force the directv box to scale to a certain resolution (when combined with setting Native to "off"). But you shouldn't do this. The video processing chipset in the directv hardware is generally going to do a much worse job than your tv will do.
The correct setup is to check all the resolutions your display supports, and then set Native to On: How to turn on Native Mode (DIRECTV new Genie menus) - The Solid Signal Blog . Make sure both your directv boxes are setup this same way and then try your test again.

 

I would think that a C61k would Not do that. It would then be sending a signal that the TV does Not know what to do with.

 

Also, assuming your Denon is 2017 or newer, make sure your Denon is not scaling, has Enhanced HDMI enabled, your C61K is plugged into the HDMI-In port closest to the HDMI-Out port, and that your cables are no more than 25' long

Denon 4K Help: 4K Source Devices and 4K AVR/TV Connections, HDR

 

He said later that the display is, in fact, a 4k display.

 

My reply was to post #8.

 

I see - however that poster didn't list what his display was...it was more a general question of whether the C61K could be forced to upscale everything to 4K (assuming one had a 4k display). (And I think, if memory serves me the answer is 'no' because on the settings screen it requires a non-4k resolution option be checked in addition to the 4k option - but I could be mistaken - if it doesn't force the additional option check and you can check only the 4k option then the answer is 'yes')

 

4K TVs upscale lesser resolutions to 4K before it comes to the TV screen for you to see.

 

Yep - of course they do. "4k" TVs have a native resolution of UHD (2160p) so anything that comes into them that's non-native must be either up-scaled (480p, 720p, 1080p) or de-interlaced (2160i - although there is no 2160i content) or both (480i, 1080i). Generally speaking, that poster (wanting to force the C61k to output everything as UHD) shouldn't do that (because the TV has better hardware to do it) unless he is trying to solve a specific problem that can't be solved another way...

 

It would only do that if it was connected to a 4K display (it knows by EDID, and the HDMI/HDCP version)

 

Theoretically the C61K should have an opportunity to do a better job upscaling, because it has the HEVC compressed data to work with. The TV only has the uncompressed HDMI, which gives it less information to work with.