The video tracks come from ITABD published by Dynit and the audio comes from JPBD. For the video, ITABD has a better encoding and higher bitrate. So there are fewer compression flaws such as banding and blocking.
The original source quality is quite good, around native 878p. The main issues are severe aliasing and ringing in the lines. We have applied anti-aliasing and de-ringing treatments while preserving the source's sharpness. Some intense fight scenes show minor compression flaws, such as those seen in the third and last set of comparison images. We've employed a newly developed adaptive deblocking method and combined them with neural network algorithms for repairs. A few scenes display mild banding, especially chroma banding is more severe, which we've mitigated using adaptive de-banding. We carried out routine compensatory sharpening and adaptive denoising as a last step.