Accession Number : AD0453094


Title :   GRAPHICAL DATA PROCESSING RESEARCH STUDY AND EXPERIMENTAL INVESTIGATION.


Descriptive Note : Quarterly progress rept. 5, 1 Jul-30 Sep 64,


Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF


Personal Author(s) : Brain,A E ; Duda,R O ; Hall,D J ; Munson,J H


Report Date : Oct 1964


Pagination or Media Count : 61


Abstract : Two groups of tests were run on the SDS 910 simulating the operation of MINOS II. In the first group, the operation of a single-bit output machine (the ninth output bit of MINOS II) was simulated and processed a data tape that MINOS II had previously been trained on. Results indicate that the performance of MINOS II is presently comparable with that of a perfect equivalent machine in which a disturbing noise level of 1% has been introduced. The second group of tests was concerned with the behavior of MINOS II on the 5-bit parity problem, the standard checkout test. The simulation showed that states in which a cycle recurs endlessly (trap states) occur with a frequency comparable to that observed experimentally. A review is presented of the carrier drive design problem as it exists in MINOS II. There are basic difficulties, and an alternative approach is suggested. MINOS II and the SDS 910 use paper tape for permanent program and data storage. This medium has been found to be relatively constraining, but the limitation has now been virtually removed by the EDIT program which allows great flexibility in error correction and duplication. (Author)


Descriptors :   *COMPUTER PROGRAMMING , *GRAPHICS , CHARACTER RECOGNITION , COMPUTER PROGRAMMING , DIGITAL COMPUTERS , SIMULATION , NOISE , CODING , PATTERN RECOGNITION , ITERATIONS , TABLES(DATA)


Distribution Statement : APPROVED FOR PUBLIC RELEASE