System displays image data in real time on 120,000-element raster scan with 2, 4, or 8 shades of grey. Designed for displaying planetary range Doppler data, system can be used for X-Y plotting, displaying alphanumerics, and providing image animation

Engle, A.

Martin, W. L.

Zygielbaum, A. I.

English

NASA Technical Reports Server

March 1973	 B73-10132 
•	 NASA TECH BRIEF 
NASA Pasadena Office
	 -4r 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage 
commercial application. Tech Briefs are available on a subscription basis from the National Technical Information 
Service, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Digital Video Display System 
A system has been developed for displaying image 
data in real time on a 120,000-element raster scan 
with 2, 4, or 8 shades of grey. Designed specifically 
for displaying planetary range Doppler data, the 
system can also be used for X-Y plotting, displaying 
alphanumerics, and providing image animation. All 
operating modes have on-line computation capabili-
ties for altering data point-by-point; the display can 
also be used to monitor the effect produced by the 
alteration of algorithms in the processing of data. 
The system consists basically of a digital computer 
interface, a data handler, an oscilloscope interface, a 
large-screen oscilloscope, and appropriate software. 
The following characteristics have been demonstrated: 
(1) A radar albedo map can be displayed in approxi-
mately 1/40 second; this is in contrast with the time 
required for construction of a map by prior-art 
methods (one week). (2) Observations can be made 
of a plot or curve as it is being developed point-by-
point. (8) Writing speed is 3000 lines of 40 char-
acters per minute; 600 alphanumeric characters can 
be displayed in four symbol sizes. 
Details of human response factors, data multiplex-
ing, data display, system hardware, and system pro-
gramming are available in a summary report.
Note: 
Requests for further information may be directed 
to:
Technology Utilization Officer 
NASA Pasadena Office 
4800 Oak Grove Drive 
Pasadena, California 91103 
Reference: TSP 73-10132 
Patent status: 
This invention has been patented by NASA (U.S. 
Patent No. 3,648,250). Inquiries concerning nonex-
clusive or exclusive license for its commercial devel-
opment should be addressed to: 
NASA Patent Counsel 
Mail Code 1 
NASA Pasadena Office 
4800 Oak Grove Drive 
Pasadena, California 91103 
Source: Arthur I. Zygielbaum,

Warren L. Martin, and Alexander Engel of

Caltech/JPL
under contract to

NASA Pasadena Office

(NPO-11342) 
Category 02 
This document was prepared under the sponsorship of the National
	 Government assumes any liability resulting from the use of the Aeronautics and Space Administration. Neither the United States
	 information contained in this document, or warrants that such use Government nor any person acting on behalf of the United States
	 will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19730000132 2020-03-17T06:44:43+00:00Z


Digital video display system

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