Video and Image Processing Suite User Guide

ID 683416
Date 4/04/2022
Document Table of Contents

8.4.2. Horizontal Symmetry

There is 1 axis of symmetry across a vertical line through the center tap in the 2D coefficient array.

In this case, the number of vertical taps (M) may be even or odd, but the number of horizontal taps (N) must be even. With horizontal symmetry enabled, there are only ((N+1)/2)×M unique coefficient values, with the remaining values in the array being mirrored duplicates.

With run-time control of the coefficients enabled, the register map only includes addresses to update the ((N+1)/2)×M unique coefficient values, indexed for an example 5×5 array as shown in the figure below.