Scaling in Jetson Nano

Hi all,
I saw in the DeepStream sdk, for scaling we can use VIC/ISP for accelerating this operation.
I use opencv+ gstreamer in python with using NVDEC to decode the stream, but for resizing I have a problem. I use opencv resizer function and this use cpu usage,
1- What are the VIC / ISP? these are HW like NVDEC?
2- I want to know how I can use VIC or ISP for resizing?

Duplicated with Scaling in jetson nano