prefix entropy

prefix entropy
префиксная энтропия

English-Russian Dictionary on Probability, Statistics, and Combinatorics. — Philadelphia and Moscow. Society for Industrial and Applied Mathematics and TVP Science Publishers. . 1994.

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  • Entropy encoding — In information theory an entropy encoding is a lossless data compression scheme that is independent of the specific characteristics of the medium. One of the main types of entropy coding creates and assigns a unique prefix free code to each… …   Wikipedia

  • Prefix code — A prefix code is a code, typically a variable length code, with the prefix property : no code word is a prefix of any other code word in the set. A code with code words {0, 10, 11} has the prefix property; a code consisting of {0, 1, 10, 11} does …   Wikipedia

  • Orders of magnitude (entropy) — The following list shows different orders of magnitude of entropy. Factor (J K−1) Value Item 10−24 9.5699×10−24 J K−1 entropy equivalent of one bit of information, = k ln 2[1] 1 5.74 J K−1 standard entropy of 1 mole of graphite …   Wikipedia

  • SI prefix — SI prefixes in everyday use Text Symbol Factor tera T 1000000000000 giga G 1000000 …   Wikipedia

  • Huffman coding — Huffman tree generated from the exact frequencies of the text this is an example of a huffman tree . The frequencies and codes of each character are below. Encoding the sentence with this code requires 135 bits, as opposed of 288 bits if 36… …   Wikipedia

  • information theory — the mathematical theory concerned with the content, transmission, storage, and retrieval of information, usually in the form of messages or data, and esp. by means of computers. [1945 50] * * * ▪ mathematics Introduction       a mathematical… …   Universalium

  • Orders of magnitude (data) — Computer memory types can be ordered into a magnitude hierarchy: memory at the top is fastest to access but holds little data, while each lower type holds more, but is slower to access An order of magnitude is generally a factor of ten. A… …   Wikipedia

  • Dictionary coder — A dictionary coder, also sometimes known as a substitution coder, is a class of lossless data compression algorithms which operate by searching for matches between the text to be compressed and a set of strings contained in a data structure… …   Wikipedia

  • Universal code (data compression) — In data compression, a universal code for integers is a prefix code that maps the positive integers onto binary codewords, with the additional property that whatever the true probability distribution on integers, as long as the distribution is… …   Wikipedia

  • Conversion of units — is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors. Contents 1 Techniques 1.1 Process 1.2 Multiplication factors …   Wikipedia

  • Alkane — Not to be confused with Alkene or Alkyne. Chemical structure of methane, the simplest alkane Alkanes (also known as paraffins or saturated hydrocarbons) are chemical compounds that consist only of hydrogen and carbon atoms and are bonded… …   Wikipedia


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