Quick outlier-resilient entropy coder for space missions

Jordi Portell de Mora; Alberto G. Villafranca; Enrique García-Berro

doi:10.1117/1.3479585

1 July 2010 Quick outlier-resilient entropy coder for space missions

Jordi Portell de Mora, Alberto G. Villafranca, Enrique García-Berro

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 4, Issue 1, 041784 (July 2010). https://doi.org/10.1117/1.3479585

Abstract

More than a decade has passed since the Consultative Committee for Space Data Systems (CCSDS) made its recommendation for lossless data compression. The CCSDS standard is commonly used for scientific missions because it is a general-purpose lossless compression technique with a low computational cost which results in acceptable compression ratios. At the core of this compression algorithm it is the Rice coding method. Its performance rapidly degrades in the presence of outliers, as the Rice coder is conceived for noiseless data following geometric distributions. To overcome this problem we present here a new entropy coder, the so-called Prediction Error Coder (PEC), as well as its fully adaptive version (FAPEC) which we show is a reliable alternative to the CCSDS standard. We show that PEC and FAPEC achieve high compression ratios even when a large amount of outliers are present in the data. This is done by testing our compressors with synthetic and real data, comparing the compression ratios and processor requirements with those obtained using the CCSDS standard.

Citation Download Citation

Jordi Portell de Mora, Alberto G. Villafranca, and Enrique García-Berro "Quick outlier-resilient entropy coder for space missions," Journal of Applied Remote Sensing 4(1), 041784 (1 July 2010). https://doi.org/10.1117/1.3479585

Published: 1 July 2010

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