First of all, the processor used by HDW3849H-AS-PV is not good.
Can't handle too many 3DNR or 2DNR operations.
CMOS performance is not good, resulting in too many noises.
The processor is too late to compute.
Dahua 4K Chinese Camera (IPC-HFW4843F1-ZYL) has 1/1.8" CMOS+ SSC339G processor.
There...