Originally Posted by leedesert
The other useless thing is UHD Color mode. All it does is allow the TV to process UHD formats. It does nothing to the other formats so why would you want that off? That option should be on all the time.
... The point is if all it does is unlock the higher formats why does it even need to be off? It does nothing to the lower bandwidth.
Originally Posted by aron7awol
HDMI UHD Color mode does more than allow the TV to process UHD formats; it unlocks higher bandwidth HDMI modes. It can cause issues in certain cases which is why the setting exists.
, what happens when you turn ON the TV's "HDMI UHD Color" setting, is that it changes the E-EDID that is sent from the TV to the HDMI connected component. (It doesn't change the actual
"capabilities" of the TV.)
When a connected video source device is first powered ON, or first connected to the TV via HDMI, it sends a request for an E-EDID (Enhanced - Extended Display Identification Data).
E-EDID is a data structure provided by a digital display to describe and relay its capabilities and operational characteristics - such as display size & type, its supported resolutions, video and audio formats, refresh rates, bit-depth, color space, luminance data, etc - to a video source device.
This information, contained in the E-EDID, then allows the source device to generate and customize its video and audio data stream output for the unique capabilities and characteristics of the individual display.
The E-EDID information maximizes the functional compatibility between devices without requiring a user to configure them manually, thus reducing the potential for incorrect settings and adjustments that could compromise the quality of the displayed images.
Sounds great doesn't it? The problem is, it doesn't always work the way it should.
In some cases, the E-EDID can be missing information, or contain incorrect information. In other instances, the source device can have a difficult time reading the E-EDID information from the display, or get "confused" and simply misinterpret the information.
It is important to realize that all of these problems can potentially contribute to EDID-related issues. As a result of these issues, the connected device may output incorrect video and audio data, or, in some cases, not output any signal whatsoever.
Now getting back to the "HDMI UHD Color" setting...
said above, the reason you might want to leave it OFF in certain cases is that it can
and sometimes does
cause issues with certain HDMI connected components.
This as been reported by a number of forum members, including myself
, where we will completely lose all audio with a connected Satellite (as in my case) or Cable receiver. I have also seen cases where someone reported issues with the picture with this setting turned ON.
In fact, in the past, with previous Samsung TVs and
before UHD Blu-ray players and UHD gaming systems became available (which only happened earlier this year), the general recommendation was always
to leave this setting turned OFF. Unless you where connecting a high-end PC to your TV (which is only a very small percentage of users), the setting was not needed. This way, you would avoid possible issues caused by having it ON.
Samsung knows about the issues with this setting. In their documentation they state: "If it is set to ON with a device that supports only an HD or FHD signal, there is a chance that the TV may not have the proper picture quality or sound. In this case, leave it OFF."
I don't know exactly what causes the issues, but if I was to venture a "guess", I would say it probably has to do with the connected device having a difficult time reading the E-EDID information from the display, or simply misinterpreting the information - which results in the incorrect video or audio data being sent, or, as is the case with the audio for my Satellite receiver, not outputting the audio signal.
For more on this setting, see the "Spoiler!" below: