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Video Synchronization Signal Generation Using Software

IP.com Disclosure Number: IPCOM000063673D
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Frazier, GR [+details]

Abstract

A method is described to generate a video synchronization signal which not only eliminates the need for specialized synchronization logic, but also enables parameters to be adjusted by simple microcode revisions. By making use of the timer interrupts, which many current microcomputers provide, the synchronization pulse generation can be done simultaneously with other control functions. The flow chart describes the video synchronization signal generation routine for the Intel 8051 microcomputer. A program which implements this flow chart may be used to drive both cathode ray tube displays as well as video cassette recorders requiring a composite video signal input.