A Consideration on Arithmetic Operation Circuits of Video Signal Processing LSI-Picot

Abstract

A videosignal-processing LSI-Picot that processes standard TV signals at video-rate has been developed. Video signal processing for broadcast demands real-time processing, which means that the processor inputs and outputs data continuously. For special video effects it also demands high sampling frequency and highly precise geometrical transformation, wave generation, etc. The Picot is a processor versatile enough to meet these demands. It performs all operations in a 7Ons cycle with a precision of at least 16 bits (partly 22 bits). This paper discusses the configuration and word-length of the programmable circuits for geometrical transformation, effect wave generation, etc. The arithmetic operation circuits and the application of the Picot are also described.