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From Middle French compression, from Latin compressio.



compression (plural compressions)

  1. an increase in density; the act of compressing, or the state of being compressed; compaction
  2. the cycle of an internal combustion engine during which the fuel and air mixture is compressed
  3. (computing) the process by which data is compressed
    • 2011, Marcelo A. Montemurro & Damián H. Zanette, “Universal Entropy of Word Ordering Across Linguistic Families”, PLoS ONE, accessed on 2012-09-26:
      Due to the presence of long-range correlations in language [21], [22] it is not possible to compute accurate measures of the entropy by estimating block probabilities directly. More efficient nonparametric methods that work even in the presence of long-range correlations are based on the property that the entropy of a sequence is a lower bound to any lossless compressed version of it [15]. Thus, in principle, it is possible to estimate the entropy of a sequence by finding its length after being compressed by an optimal algorithm. In our analysis, we used an efficient entropy estimator derived from the Lempel-Ziv compression algorithm that converges to the entropy [19], [23], [24], and shows a robust performance when applied to correlated sequences [25] (see Materials and Methods).
  4. (music) the electronic process by which any sound's gain is automatically controlled
  5. (astronomy) the deviation of a heavenly body from a spherical form

Derived terms[edit]



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