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IGCC: Color Format vs YCrCb settings

JM3028
Beginner
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I am a bit confused about the Color Format (General tab) and YCrCb (Color tab) settings as shown below.  

 

JM3028_0-1676862414687.png

 

JM3028_2-1676862737407.png

 

1) If  Color Format is set to RGB, I would have thought YCrCb be disabled automatically and locked.  Why does IGCC allows users to enable YCrCb in the Color tab?

 

2) If Color Format is set to YcbCr 420 or 440, I would have thought YCrCb be enabled automatically and locked.  Why does IGCC allows users to disable YCrCb in the Color tab?

 

In short, what is the purpose of having a YCrCb tab in the Color tab?

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7 Replies
Jean_Intel
Moderator
693 Views

Hello JM3028,

 

Thank you for posting on the Intel️® communities. We understand you are confused about the  Color Format (General tab) and YCrCb (Color tab) settings.

 

We will look further into this scenario and provide a response at our earliest convenience.

 

Best regards,

Jean O. 

Intel Customer Support Technician


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Jean_Intel
Moderator
669 Views

Hello JM3028,

 

After reviewing this matter, we can confirm that the difference is RGB can display darker and brighter scenes better than YCbCr444 however this is very dependent on what the customer does, so for example one or the other can work better for video editing, gaming, daily tasks, watching movies, etc

 

To properly answer your question we would like to confirm the following information:

  • Can you confirm if you have an HDMI display connected and what is the model? 
  • Do you want to have the option locked when he chooses one or the other?
  • Create a report using the following applications:
    • Intel®️ System Support Utility (Intel®️ SSU) 
    • Download the Intel SSU
    • Open the application and click "Scan" to see the system and device information. By default, Intel®️ SSU will take you to the "Summary View."
    • Click on the menu where it says: "Summary" to change it to "Detailed View."
    • To save your scan: click "Next"; then "Save."


  • Intel® Graphics Command Center:
    • Open the Intel Graphics Command Center
    • Navigate to the Support tab
    • Select System Diagnostic
    • Click Generate Report
    • Select Save and name the output file.


Best regards,

Jean O.

Intel Customer Support Technician


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JM3028
Beginner
652 Views

Hi Jean,

 

Thanks for your prompt response.   Followings are my clarification and additional information as requested:

 

  1. My computer is connected to two displays.  1st display is a FHD monitor;  connection is HDMI at the monitor and Display Port at the computer via a HDMI to DP adapter.  2nd display is a 4K Samsung S95B TV; connection is HDMI to HDMI.
  2. My primary objective is to have a combination of settings such that: (1) there is only "ONE" occurrence of YCrCb to RGB conversion, and  (2) the YCrCb to RGB conversion is carried out by my Samsung TV; the video information in the GPU/CPU always stays in the YCrCb color format.  Would setting  "Color Format" to "YCrCb_444/420" and enable "Luminance-based Color Model" under the "Color" tab fulfill my objective?
  3. Attached.
  4. Attached.

 

Since color format in video files is YCrCb, I am wondering what would happen when setting "Color Format" to "RGB and enable "Luminance-based Color Model" under the "Color" tab?  Does it mean GPU would convert YCrCB to RGB for processing and then convert back to YCrCb for output?  This is just of academic interest, I don't want this in my setup.

 

Thanks.

 

 

 

 

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Jean_Intel
Moderator
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Hello JM3028,

 

We will continue reviewing this matter internally. We will do further research on this matter and post the response on this thread once available.

 

Best regards,

Jean O.

Intel Customer Support Technician


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Jean_Intel
Moderator
586 Views

Hello JM3028,

 

We appreciate your patience.

 

YCbCr represents color as brightness and two color difference signals, while RGB represents color as red, green, and blue. It is needed depending on display capabilities and the variety of specs between all displays on the market depending on what you need the display for.

 

 As per your second question, you are right; the GPU will not convert them but will allow managing, again, based on display capabilities, which may vary from one display to another.

 

Best regards,

Jean O.


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Jean_Intel
Moderator
562 Views

Hello JM3028,

 

We hope you are doing fine.

 

We have not heard back from you. So we will close this thread. If you need any additional information, submit a new question, as this thread will no longer be monitored.

 

Best regards.

Jean O. 

Intel Customer Support Technician.


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JM3028
Beginner
547 Views

Hi Jean,

 

Based on my interpretation of your reply, I would take:

 

"When  "Color Format" is set to "YCrCb_444/420" and "Luminance-based Color Model" is enabled under the "Color" tab,  videos will be output in YCrCb and GPU will not convert YCrCb to RGB for manipulating and processing."

 

If I haven't misinterpreted  your reply, I am happy to have this thread closed, and aske subsequent questions in another thread.

 

Thanks.

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