Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Fibonacci coding


Related Topics

In the News (Mon 21 Dec 09)

  
  Fibonacci coding - Encyclopedia, History, Geography and Biography
The Fibonacci code for a particular integer is exactly that of the integer's Fibonacci representation, except with the order of its digits reversed and an additional "1" appended to the end.
Fibonacci coding has a useful property that sometimes makes it attractive in comparison to other universal codes: it is easier to recover data from a damaged stream.
With Fibonacci coding, on the other hand, a changed bit may cause one token to be read as two, or cause two tokens to be read incorrectly as one, but reading a "0" from the stream will stop the errors from propagating further.
www.arikah.net /encyclopedia/Fibonacci_coding   (381 words)

  
 Fibonacci coding -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-20)
In (A science (or group of related sciences) dealing with the logic of quantity and shape and arrangement) mathematics, Fibonacci coding is a (Click link for more info and facts about universal code) universal code which encodes positive integers into binary (Click link for more info and facts about code word) code words.
The Fibonacci code is closely related to Fibonacci representation, a positional (Click link for more info and facts about numeral system) numeral system sometimes used by mathematicians.
With most other universal code, if a single (The cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press) bit is altered, none of the data that comes after it will be correctly read.
www.absoluteastronomy.com /encyclopedia/f/fi/fibonacci_coding.htm   (407 words)

  
 The "Fibonacci Code" as a Serial Data Code
Group codes achieve greater density by allowing a larger number of cells to pass without a transition, and are commonly used on such media as hard disk drives.
The Fibonacci code is sent in blocks of a pre-determined length, which can then be decoded to yield a binary number.
The result is a weighted code, just like decimal or hexadecimal or octal number representation, except with "column" weights which are the Fibonacci numbers instead of powers of the radix (base), and with the additional property that a single "0" code element uses up two columns.
home.comcast.net /~lkrakauer/codedata.htm   (1003 words)

  
 Data Compression -- Section 3
3.3 Universal Codes and Representations of the Integers
The result is an instantaneously decodable code since the total length of a codeword is exactly one greater than twice the number of zeros in the prefix; therefore, as soon as the first 1 of a codeword is encountered, its length is known.
That is, the Fibonacci representation is reversed and 1 is appended.
www.ics.uci.edu /~dan/pubs/DC-Sec3.html   (4346 words)

  
 Entropy encoding - Wikipedia, the free encyclopedia
An entropy encoding is a coding scheme that assigns codes to symbols so as to match code lengths with the probabilities of the symbols.
Typically, entropy encoders are used to compress data by replacing symbols represented by equal-length codes with symbols represented by codes proportional to the negative logarithm of the probability.
If the approximate entropy characteristics of a data stream are known in advance (especially for signal compression), a simpler static code such as unary coding, Elias gamma coding, Fibonacci coding, Golomb coding, or Rice coding may be useful.
en.wikipedia.org /wiki/Entropy_coding   (189 words)

  
 The Design and Analysis of Efficient Lossles Data Compression Systems
Rice coding, developed independently by Rice [53,54,55], is the same as Golomb coding except that only a subset of the parameter values may be used, namely the powers of 2.
This code can be decoded in parallel: each decoding processor can determine when the code for its event is complete, and the same concurrent write and prefix operation can determine where the remaining processors are to obtain their next bits.
Code lookup is assumed to be fast: the codes are small enough that the full code can be stored in each processor's memory, or perhaps distributed among small groups of nearby processors.
www.djvuzone.org /djvu/sci/yann/thesis/index.emb.html   (943 words)

  
 Fibonacci coding
Then, the Fibonacci coding of the message M given in the matrix form (1) consists of the multiplication of the initial matrix (1) by the coding matrix (4), that is:
The decoding of the code message E is executed in the following manner.
The code message E is represented in the matrix form and the code matrix E is multiplied by the inverse Q-matrix of the power of 5:
www.goldenmuseum.com /1508FibCode_engl.html   (301 words)

  
 codewalkers.com - php tutorials - Recursion in PHP - PHP Help
Fibonacci is another formula that works with recursion, but it also makes you examine if recursion is always the best thing to use in some cases.
If you are interested in how to calculate the Fibonacci sequence in a non-recursive manner, I've put together a short section at the end of this tutorial explaining an iterative method of calculating the sequence.
If this code were actual PHP code, it would allow you to start with a starting directory and go through each of the subdirectories doing something.
codewalkers.com /tutorials/39/3.html   (526 words)

  
 Data compression - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-20)
In computer science, data compression or source coding is the process of encoding information using fewer bits (or other information-bearing units) than a more obvious representation would use, thanks to specific encoding schemes.
One very simple means of compression, for example, is run-length encoding, wherein large runs of consecutive identical data values are replaced by a simple code with the data value and length of the run.
A current LZ based coding scheme that performs well is LZX, used in Microsoft's CAB format.
www.peekskill.us /project/wikipedia/index.php/Data_compression   (1208 words)

  
 Encyclopedia: Fibonacci coding   (Site not responding. Last check: 2007-10-20)
If the previous (next smaller) Fibonacci number is less than or equal to x, replace x with the difference, and append 1 to the output.
Repeat this step until the Fibonacci number 1 is encountered.
This method guarantees that there are no consecutive 1's in the Fibonacci representation of any number.
www.nationmaster.com /encyclopedia/Fibonacci-coding   (228 words)

  
 Data Compression -- Section 6
An error in the code representation constitutes a drastic loss and therefore extreme measures for protecting this part of the transmission are justified.
The Elias codes of Section 3.3 are not at all robust.
Lempel-Ziv codes appear to be promising, although the absence of a worst-case bound on the redundancy of an individual finite source ensemble is a drawback.
www.ics.uci.edu /~dan/pubs/DC-Sec678.html   (3614 words)

  
 The Math Forum - Math Library - Golden Ratio/Fibonacci   (Site not responding. Last check: 2007-10-20)
Fibonacci numbers are closely related to the golden ratio (also known as the golden mean, golden number, golden section) and golden string.
Explore applications of the Fibonacci series: Fibonacci ratios, Binet revisited, one over eighty-nine (examining the decimal expansion of 1/89), apartment buildings (an explanation of why the number of combinations for each set of a certain group of apartment buildings is a Fibonacci number), nature, Leonardo da Vinci.
Fibonacci and his original problem about rabbits that gave the series its name; the family trees of bees; the golden ratio and the Fibonacci series; the Fibonacci Spiral and sea shell shapes; branching plants; flower petal and seed-heads; and the leaf...more>>
mathforum.org /library/topics/golden_ratio   (2503 words)

  
 The life and numbers of Fibonacci
Fibonacci is perhaps best known for a simple series of numbers, introduced in Liber abaci and later named the Fibonacci numbers in his honour.
The Fibonacci numbers are studied as part of number theory and have applications in the counting of mathematical objects such as sets, permutations and sequences and to computer science.
This article was based on material written by Dr R. Knott, a lecturer in the Department of Computing Studies at the University of Surrey and additional material by Dr D. Quinney, a lecturer in the Department of Mathematics, University of Keele.
plus.maths.org /issue3/fibonacci   (937 words)

  
 Elias gamma coding -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-20)
Elias gamma code is a (Click link for more info and facts about universal code) universal code encoding the positive integers.
To code a (A concept of quantity derived from zero and units) number:
Gamma coding is used in applications where the largest encoded value is not known ahead of time, or to (A cloth pad or dressing (with or without medication) applied firmly to some part of the body (to relieve discomfort or reduce fever)) compress data in which small values are much more frequent than large values.
www.absoluteastronomy.com /encyclopedia/E/El/Elias_Gamma_coding.htm   (266 words)

  
 Auxilary Compression Transforms.
Elias Universal Coding is intended for universal coding of individual integers that can be distinguished in unmarked stream of bits.
Fibonacci Code is intended for universal coding of individual integers that can be distinguished in unmarked stream of bits.
The intention of Fibonacci Code is similar to Elias Code, however the method of encoding is quit different.
compressions.sourceforge.net /Auxilary.html   (1232 words)

  
 Wehner's Data Compression
Fibonacci knew this, but had discovered that there is now the possibility of finding approximations, like the popular 22/7 for pi.
When the data is presented as three bytes per pixel, Wehner coding learns to wrap it up as one code per pixel and then two, three, five and onward.
Where we exit from the Fibonacci sequence in order to compress the consecutive codes, we continue to count our way up the sequence in order to keep track of how many bits are needed.
www.wehner.org /compress   (11682 words)

  
 Find fibonacci code here   (Site not responding. Last check: 2007-10-20)
Fibonacci Numbers and Genetic Code Initial data about genetic code Among biological concepts, well formalized and having a level of the general scientific significance, the genetic code takes a special place.
We have a piece of code that calculates the Fibonacci sequence for a given iteration.
You can use the code that was provided in Fibonacci.java on Assignment 1 as a model for the linear time method.
www.futureseducation.com /futures-market30/fibonacci-code.html   (590 words)

  
 Stephen Pierce's Fibonacci Secrets   (Site not responding. Last check: 2007-10-20)
To his credit, Fibonacci is the person who adopted the decimal system and introduced Arabic arithmetic to the Western world.
Fibonacci is not really all that complex, and I don't mean to alarm you.
Your Fibonacci Secrets is a superb trading course explaining exactly how to use technical analysis to identify key support and resistance levels.
FibonacciSecrets.com   (5887 words)

  
 Data compression - Wikipedia, the free encyclopedia
In computer science, data compression or source coding is the process of encoding information using fewer bits (or other information-bearing units) than a more obvious representation would use, through use of specific encoding schemes.
For example, this article could be encoded with fewer bits if we accept the convention that the word "compression" is encoded as "comp".
Doyle and Carlson (2000) wrote that data compression "has one of the simplest and most elegant design theories in all of engineering".
en.wikipedia.org /wiki/Data_compression   (1197 words)

  
 Read about Fibonacci coding at WorldVillage Encyclopedia. Research Fibonacci coding and learn about Fibonacci coding ...   (Site not responding. Last check: 2007-10-20)
Research Fibonacci coding and learn about Fibonacci coding here!
universal code which encodes positive integers into binary
The Fibonacci code is closely related to Fibonacci representation, a positional
encyclopedia.worldvillage.com /s/b/Fibonacci_coding   (347 words)

  
 Fabulous Adventures In Coding : Results Of The Fibonacci Challenge Are In
Results Of The Fibonacci Challenge Are In Another bunch of good replies to my challenge of yesterday.
The definition of the Fibonacci numbers that I gave is called a "recurrence relation".
First off, please point out the sentence in which I stated that the problem was "calculate the nth fibonacci number".
blogs.msdn.com /ericlippert/archive/2004/05/20/136327.aspx   (1263 words)

  
 Find fibonacci matrix here   (Site not responding. Last check: 2007-10-20)
In the last decades the theory of Fibonacci numbers was supplemented by the theory of so-called...
Fibonacci numbers are implemented in Mathematica as Fibonacci [n].
A collection of 170 formula for Fibonacci numbers, Lucas numbers and the golden section, the G series (general Fibonacci), summations and binomial coefficients with references.
www.futureseducation.com /futures-market31/fibonacci-matrix.html   (503 words)

  
 Fibonacci coding   (Site not responding. Last check: 2007-10-20)
The Elias codes are asymptotically better, but Fibonacci is better for "small" numbers (up to 514228, when compared to Elias-delta).
These universal codes can be used to encode a sequence of positive integers as a compact bitstream.
The code below implements procs to encode a list of positive integers as a bitstream, and to decode a bitstream as a list of positive numbers.
tcl.mini.net /12324   (343 words)

  
 Open Directory - Science: Math: Applications: Communication Theory: Coding Theory   (Site not responding. Last check: 2007-10-20)
Coding Theory and Algebraic Geometry: an Interplay - A short explanation of Goppa codes by J. Hirschfeld.
On Woven Convolutional Codes - Thesis by Stefan Hoest.
Theory of Codes - Lecture notes from a course taught by Jean Berstel and Dominque Perrin.
dmoz.org /Science/Math/Applications/Communication_Theory/Coding_Theory   (371 words)

  
 Programs   (Site not responding. Last check: 2007-10-20)
Arithmetic coding is theoretically better than Huffman coding, it will usually yield a marginally better result, and after the latest optimization, it is even faster than huffman too!
Static-tree Huffman same as huffman coding, but not adaptive, meaning it is very fast, but compresses poorer.
The program is quite intelligent with respect to guessing filenames and extensions (the default extension for a compressed file is 'whc'), and it also stores information in the header about the used compression method, so you do not have to remember that.
www.mdjnet.dk /programs.html   (1145 words)

  
 [No title]   (Site not responding. Last check: 2007-10-20)
The students will be coding the Fibonacci sequence recursively.
The Fibonacci sequence is 0, 1, 1, 2, 3, 5, 8, 13,...where the first two terms are 0 and 1, and each term thereafter is the sum of the two preceding terms.
The parameter passed to the function should be an integer n, which is input by the user, and returns the nth number in the sequence.
www.iit.edu /~tandmud/TA/inlabs/0306.txt   (81 words)

  
 The Encoder   (Site not responding. Last check: 2007-10-20)
In telecommunication, bipolar encoding is a type of line code — a method of encoding digital information to make it resistant to certain forms of signal loss during transmission.
Like arithmetic coding, range encoding conceptually encodes all the symbols of the message into one number, unlike Huffman coding which assigns each symbol a bit-pattern and concatenates all the bit-patterns together.
Arithmetic coding can be thought of as a form of range encoding with the range starting at zero and extending to one.
www.the-encoder.info   (1861 words)

  
 Dyalog APL - Function memoization:   (Site not responding. Last check: 2007-10-20)
1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597 2584 4181 6765 © Notice that afib is coded to use its own name explicitly, rather than '’' © for the recursion.
This is so that the recursive call references the newly- © assigned derived function, whereas '’' would have referenced the original © function and circumvented the memoization.
© Perhaps surprisingly, the cache can be relied upon to supply the "base values" © of the recursion, thus simplifying the initial function coding.
www.dyalog.com /dfnsdws/s_memo.htm   (408 words)

  
 DataCompression.info - Huffman Coding   (Site not responding. Last check: 2007-10-20)
The decoder is one pass and uses a huffman code table at the beginning of the compressed file to decode the file.
The code from an article from by Sergey Ignatchenko from the October 1998 C User's Journal.
This type of Huffman coding follows some specific rules regarding the structure of the Huffman tree that simplify the process of transmitting the tree.
datacompression.info /Huffman.shtml   (3327 words)

  
 Low-Power VLSI
Since dynamic power dissipation is directly proportional to switching activity, I am currently working on giving new coding techniques which minimizes the switching activity over data bus.
Also, I am concentrating on designing new coding techniques to eliminating/reducing the crosstalk delay caused by opposite transitions on adjacent lines.
In that direction, we proposed a new bus encoding technique using a variant of binary Fibonacci representation of integers to eliminate crosstalk delay and give a recursive procedure to generate Fibonacci codewords.
www.iiit.net /~mutyam/Low-Power_VLSI.html   (401 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.