Error in planar YCbCr to RGB conversion on Gen11 CPU

[Matt_B]

I've encountered an error in the following functions:

• ippiYCbCr420ToRGB_8u_P3C3R
• ippiYCbCr422ToRGB_8u_P3C3R

I don't have access to a great variety of systems to test, but I do have Gen7 and Gen 8 which work fine and a Gen11 which does not. I discovered this issue with IPP version 2020.4.311. I upgraded to version 2021.5.3, and the problem remains.

Briefly, the output images from both functions executed on the Gen11 system contain distorted vertical banding.

The attached zip file contains a self-contained VisualStudio project (using IPP 2021.5.3) with sample input files, output files as generated on the problem system, and the Windows system information dump from the problem system.

Any ideas? I didn't find indication that anyone else has reported this so far.

Thanks,

-- Matt

[Matt_B]

By the way, the sample code also generates output using the following functions:

• ippiYCbCr420ToBGR_8u_P3C3R
• ippiYCbCr422ToBGR_8u_P3C3R

The output from both of these is good.

[ShanmukhS_Intel]

Hi Matt_B,

Thanks for posting on Intel Communities with issue details and project files.

We are working on your issue internally, We'll get back to you soon with an update.

Best regards,

Shanmukh.SS

[Ruqiu_C_Intel]

Hello Matt_B,

Thank you for your patience. We would like to let you know that the fixed is available in oneAPI 2023.1 which launched last week.

Regards,

Ruqiu