Pulse code modulation data compression for automated test equipment

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Development of automated test equipment for an advanced telemetry system requires continuous monitoring of PCM data while exercising telemetry inputs. This requirements leads to a large amount of data that needs to be stored and later analyzed. For example, a data stream of 4 Mbits/s and a test time of thirty minutes would yield 900 Mbytes of raw data. With this raw data, information needs to be stored to correlate the raw data to the test stimulus. This leads to a total of 1.8 Gb of data to be stored and analyzed. There is no method to analyze this amount ... continued below

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Pages: (7 p)

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Navickas, T.A. & Jones, S.G. May 1, 1991.

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Description

Development of automated test equipment for an advanced telemetry system requires continuous monitoring of PCM data while exercising telemetry inputs. This requirements leads to a large amount of data that needs to be stored and later analyzed. For example, a data stream of 4 Mbits/s and a test time of thirty minutes would yield 900 Mbytes of raw data. With this raw data, information needs to be stored to correlate the raw data to the test stimulus. This leads to a total of 1.8 Gb of data to be stored and analyzed. There is no method to analyze this amount of data in a reasonable time. A data compression method is needed to reduce the amount of data collected to a reasonable amount. The solution to the problem was data reduction. Data reduction was accomplished by real time limit checking, time stamping, and smart software. Limit checking was accomplished by an eight state finite state machine and four compression algorithms. Time stamping was needed to correlate stimulus to the appropriate output for data reconstruction. The software was written in the C programming language with a DOS extender used to allow it to run in extended mode. A 94--98% compression in the amount of data gathered was accomplished using this method. 1 fig.

Physical Description

Pages: (7 p)

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OSTI; NTIS; GPO Dep.

Source

  • International telemetering conference, Las Vegas, NV (United States), 4 Nov 1991

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  • Other: DE92000464
  • Report No.: KCP-613-4624
  • Report No.: CONF-911187--2
  • Grant Number: AC04-76DP00613
  • Office of Scientific & Technical Information Report Number: 5147242
  • Archival Resource Key: ark:/67531/metadc1054397

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 1, 1991

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  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 29, 2018, 12:11 p.m.

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Navickas, T.A. & Jones, S.G. Pulse code modulation data compression for automated test equipment, article, May 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1054397/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.