Elias coding is term used for one of two types of lossless coding schemes used in
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* Universal coding using one of Elias' three universal codes, each with predetermined codewords:
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Elias omega coding — is a universal code encoding the positive integers. Like Elias gamma coding and Elias delta coding, it works by prefixing the integer with a representation of its order of magnitude in a universal code. Unlike those other two codes, however,… … Wikipedia
Elias gamma coding — Elias gamma code is a universal code encoding positive integers. It is used most commonly when coding integers whose upper bound cannot be determined beforehand. To code a number: #Write it in binary. #Subtract 1 from the number of bits written… … Wikipedia
Elias delta coding — Elias delta code is a universal code encoding the positive integers. To code a number: #Write it in binary. #Count the bits and write down that number of bits in binary (X). #Use the binary digit written in step 1 again, remove the leading bit… … Wikipedia
Shannon–Fano coding — In the field of data compression, Shannon Fano coding is a suboptimal technique for constructing a prefix code based on a set of symbols and their probabilities (estimated or measured). The technique was proposed prior to the optimal technique of … Wikipedia
Exponential-Golomb coding — An Exponential Golomb code (or just Exp Golomb code) of order k is a type of universal code, parameterized by a whole number k. To encode a nonnegative integer in an order k exp Golomb code, one can use the following method: # Take the number in… … Wikipedia
Peter Elias — (* 23. November 1923 in New Brunswick, New Jersey; † 7. Dezember 2001 in Cambridge, Massachusetts) war ein US amerikanischer Wissenschaftler und Professor für Informationstheorie am MIT. Er war ein bedeutender Pionier der Informationstheorie,… … Deutsch 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
Levenshtein coding — is a universal code encoding the non negative integers developed by Vladimir Levenshtein.The code of zero is 0 ; to code a positive number: #Initialize the step count variable C to 1. #Write the binary representation of the number without the… … Wikipedia
Adaptive Huffman coding — (also called Dynamic Huffman coding) is an adaptive coding technique based on Huffman coding. It permits building the code as the symbols are being transmitted, having no initial knowledge of source distribution, that allows one pass encoding and … Wikipedia
Modified Huffman coding — is used in fax machines to encode black on white images (bitmaps). It combines the variable length codes of Huffman coding with the coding of repetitive data in run length encoding. External links Modified Huffman coding from UNESCO . Archived… … Wikipedia
