edge ai flows&mosaic explanation please.

Hi, I am gonna use ai model on bbai-64.
There is an edge ai that Texas Instrument supply for TDA4VM which is the chipset of bbai-64
According to the webpage below, there are a flow and mosaic.

They look like conversion region (something like region of interest) about input to output.
Is there someone draw the figure to help me understand briefly?

Thx a lot.