Coded data generation or conversion – Digital code to digital code converters – To or from number of pulses
Patent
1999-03-08
2000-11-28
Young, Brian
Coded data generation or conversion
Digital code to digital code converters
To or from number of pulses
341 87, 348390, 348416, H03M 740
Patent
active
061541559
ABSTRACT:
A method of coding and compressing telemetry data makes use of the fact that the telemetry frames are typically highly correlated at a distance, .delta., corresponding to commutation or data periodicities. The existence of such periodicity is used to render a portion of each frame to zeros. The next steps are to search for and remove correlations between the bits in a set of frames, denoted {F.sub.i *}. The compression algorithm implementing the method according to the invention has four sub-steps; Data preconditioning, Compression and coding of first frame, F.sub.1, Compression and coding of frames 2-.delta., F.sub.1 -F.sub..delta., and Compression and coding of F.sub..delta.+1 and on, the steady-state mode.
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patent: 5825424 (1998-10-01), Canfield et al.
patent: 5844608 (1998-12-01), Yu et al.
"Satellite Data Archives Algorithm," K. Nickels; C. Thacker, IEEE, 1991, p. 447.
"Efficient Run-Length Encodings," H. Tanaka; A. Leon-Garcia, IEEE Transactions on Information Theory, vol. 28, 1982, pp. 880-890.
Fergus Ross John Anderson
Grabb Mark Lewis
Hershey John Erik
Joshi Namita
Nowak Thomas Gerard
General Electric Company
Nguyen John
Snyder Marvin
Stoner Douglas E.
Young Brian
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