Accession Number:

AD0248989

Title:

STUDY OF VARIABLE SPEED FACSIMILE SCANNING TECHNIQUES

Descriptive Note:

Corporate Author:

DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

Personal Author(s):

Report Date:

1960-09-01

Pagination or Media Count:

29.0

Abstract:

WORK WAS BASICALLY OF A RESEARCH NATURE, THE INTENT BEING TO STUDY VARIABLE VELOCITY FACSIMILE SYSTEMS, TO EVALUATE THEM FROM A PRACTICAL VIEWPOINT, AND TO USE THIS BACKGROUND IN ATTEMPTING TO DEVELOP A VERSATILE AND PRACTICAL SYSTEM THAT WOULD BE USEFUL 1 IN CONSERVING BANDWIDTH OR 2 IN INCREASING THE SPEED OF FACSIMILE TRANSMISSION WITHIN A GIVEN BANDWIDTH. A SUMMARY IS GIVEN OF THE WORK DONE AND GENERAL CONCLUSIONS DERIVED FROM THIS WORK. THIS SUMMARY INCLUDES 1 A DISCUSSION OF THE METHODS USED IN HOLDING THE BANDWIDTH DOWN AND DESIGNINGA SYSTEM THAT HAS CONSIDERABLE TOLERANCE TO DELAY DISTORTION 2 A DSCRIPTION OF THE TWO SPEED BLACK AND WHITE SYSTEM FIRST BUILT, THE REASONS IT PROVED INADEQUATE AT THAT TIME AND A METHOD OF MAKING IT PRACTICAL 3 A DESCRIPTION OF THE CHIEF CIRCUIT PROBLEMS INVOLVED INBUILDING WORKING MODELS OF THE FM CONTROLLED HALF-TONE SYSTEM THAT CAME OUT OF THIS STUDY AND 4 A STATEMENT OF THE STATUS OF THE MODELSAT THE TERMINATION OF THE CONTRACT

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE