Image Signal Processor On NVR Side Instead Of Camera?

I've been looking at ISP (Image Singal Processor) blocks and noticed that sometimes the ISP can reside in the sensor itslef, sometimes the ISP resides in the camera processor, and sometimes parts of the ISP resides in both. To simplify the camera, does anybody just encode the image, ship it over to a Network Video Recorder (NVR), decode there and conduct the ISP functions at the NVR? Would/could that help to make less expensive IP cameras? If I encode, ship, then decode a raw image (warts and all) and then try to conduct ISP functions on that decoded image... did I loose too much detail in the encode/decode process to do things like CFA crosstalk noise filtering, AE/ASB/AF, fish-eye dewarping, etc. Also, would there be concern about the integrity of the resultant data via a "post processing" at a remote NVR location??? Just curious if anybody is doing this and what the issues surrounding implementation might be.

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