Low Error Approximate Absolute Difference Hardware

Abstract

In this paper, we propose low error approximate absolute difference (LAD_X) hardware. LAD_X hardware has lower maximum and average error, and higher accuracy than the approximate absolute difference (AD) hardware in the literature. It has similar performance with and smaller area than the approximate AD hardware in the literature. The H.264 motion estimation (ME) hardware using LAD_X hardware performs higher quality ME than the H.264 ME hardware using the approximate AD hardware in the literature. It has similar performance with and smaller area than the H.264 ME hardware using the approximate AD hardware in the literature.