Transformational Design of a Direction Detector for the Progressive ScanConversion Processor

摘要

This document discusses the transformational design of a direction detector usedin the progressive scan conversion processor. The purpose is to show the feasibility of transformational design for real life designs and in particular the use of transformational design for the synthesis of processing units for the PHIDEO silicon compilation system. The processor design is used to reduce screen flicker by doubling the screen frequency by means of interpolating intermediate lines of a field of an interlaced frame. The interpolation algorithm takes the presence of edges in a field into account. This report shows in detail the design of the Abs-Diff function which is extensively used in the algorithm. The design of the complete direction detector is shown in less detail. Based on the experience gained, a first attempt towards developing a systematic approach to transformational design is made.