Ringing artifacts on the output

[shivarama93]

Hello.. I was training EDVR with pre-deblur and TSA modules. I used the REDS4 dataset with some degradations from Real-ESRGAN such as random downsampling, blurring and different noises such as Gaussian, Poisson, JPEG etc. I am now getting some ringing artifacts on the testing data (which is blurry and noisy as well). The ringing artifacts are more in the middle region, but comparatively less in the top region as shown below,

I think that the reason for these artifacts is the pre-deblur block.
What maybe the issue I am facing here? What could be the solution for this problem?

Thank you in advance.