Hardware implementation of gaussian noise generator using ICDF

I am implemententing a GNG using Verilog, the blovk diagram is attached below. The implementation is based on the IEEE paper "Hardware Architecture of a Gaussian Noise Generator Based on the Inversion Method". In this, i could not understand what exactly does the ROM_trans block needs to store. I understand it is a lookup table, but do not know what to store inside it. Also how will i determine the coefficients that needs to be stored in the ROM_coeffs block.

Need your timely help.Block Diagram