A noncodingRNA ncRNA is a functional RNA molecule that is not Translation genetics translated into a protein . Less frequently used synonyms are non protein codingRNA npcRNA , non messenger RNA nmRNA and functional RNA fRNA . The term small RNA sRNA is often used for short bacteria l ncRNAs. The DNA sequence from which a noncodingRNA is transcribed is often called an RNA gene . NoncodingRNA ... ray analysis. The first noncodingRNA to be characterised was an alanine tRNA found in baker s yeast ... by URNA in the early 1980s. Since then, the discovery of new noncoding RNAs has continued with snoRNAs , Xist , CRISPR and many more. ref name Edd01 cite journal author Eddy SR title NoncodingRNA ... RNA Long noncoding RNAs in disease Long noncoding RNAs in disease As with protein s, mutations ... M, Pickard MR, Hedge VL, Farzaneh F, Williams GT title GAS5, a non protein codingRNA, controls apoptosis .... Studies have suggested that p53 expression is subject to regulation by noncodingRNA. ref ... from 99 species of bacteria, archaea and eukaryota Nucleic acids DEFAULTSORT NonCodingRna Category RNA Category Molecular genetics ca ARN no codificant cs Nek duj c RNA de NoncodingRNA es ARN no codificante it RNAnon codificante ja RNA pl Niekoduj ce RNA ru ur ... Morris, KV editor year 2012 title Noncoding RNAs and Epigenetic Regulation of Gene Expression Drivers ... Noncoding RNAs hope or hype? journal Trends Genet volume 21 issue 5 pages 289 97 year 2005 pmid ... of transcription initiation of noncoding RNAs journal Nature volume 456 issue 7218 pages 130 4 year ... JS title Differentiating protein coding and noncoding RNA challenges and ambiguities journal PLoS ... Kloc M, Wilk K, Vargas D, Shirato Y, Bilinski S, Etkin LD title Potential structural role of noncoding ... noncoding RNAs in disease long mRNA like ncRNAs , ref name pmid11890990 cite journal author Pibouin .... Yet the term fRNA could also include Messenger RNA mRNA as this is RNAcoding for protein ... more details
Long noncodingRNA s long ncRNAs, lncRNA are generally considered somewhat arbitrarily as non protein ... 2007 , indicating at least four times more long noncoding than codingRNA sequences. However ... that escape from X inactivation might be mediated by expression of long noncodingRNA within the escaping ... JA, Kugel JF title NoncodingRNA regulators of RNA polymerase II transcription journal Nature Reviews ... of a novel noncodingRNA, MIAT, that confers risk of myocardial infarction journal Journal ... project identified 35,000 noncoding transcripts from 10,000 distinct loci that bear many signatures ... from noncoding transcripts. Genomic organisation of long ncRNAs The current landscape of the mammalian ... within a number of different coding and noncoding transcripts in the sense and antisense directions ... change relative to the chimpanzee genome occurs mainly in noncoding regions, many of which are transcribed ... and expression of similar noncoding ultraconserved elements was recently shown to be abnormal ... programmes to regulate adjacent protein coding gene expression. The RNA binding protein TLS, binds ... expression of noncoding repetitive sequences. The short interspersed nuclear SINE Alu sequence ... partner gene, CENPF CENP F in trans. Long noncoding RNAs in post transcriptional regulation .... Telomeric noncoding RNAs Telomeres form the terminal region of mammalian chromosomes and are essential ... an involvement for telomeric ncRNAs in various aspects of telomere biology. Long noncoding RNAs ... ref15855153 Sonkoly 2005 . Genome wide profiling revealed that many transcribed noncoding ... disease conditions are found within noncoding regions and the complex networks of noncoding transcription ... intergenic noncoding RNAs lincRNA Expand section more examples and references date December 2011 Intergenic refers to long noncoding RNAs that are transcribed from noncoding DNA sequences between protein ... small non messenger RNA behavioural alterations in BC1 RNA deleted mice journal Behavioural Brain Research ... more details
. Many noncoding RNAs have been identified within the bacteria genome where several of these have been classified as novel noncoding RNAs and may contribute to pathogenesis . ref name pmid17259222 ... ref Tiling array Tiling arrays and mutagenesis identified many noncoding RNAs within the L. monocytogenes genome and the location of these noncoding RNAs within the bacterial genome was confirmed by Rapid ... that the expression of many noncoding RNAs was dependent on the environment and that several of these noncoding RNAs act as as cis regulatory element cis regulatory elements . Comparisons between previously characterized noncoding RNAs and those present in the L. monocyotogenes genome identified 50 novel noncoding RNAs in L. monocyotogenes . An additional comparative study between the pathogenic L. monocytogenes strain and the non pathogenic L. innocua strain identified several noncoding ... small noncoding RNAs identified and the previously characterized noncoding RNAs present in L. monocytogenes Novel Noncoding RNAs class wikitable ID Start Stop Size 5 flanking gene sense of the gene ... noncoding RNAs class wikitable ID Rfam ID Rfam SAM riboswitch S box leader SAM RF00162 PrfA .... Family http rfam.sanger.ac.uk family RF01494 RF01494 . Category Listeriaceae Category NoncodingRNA ... RNA in Listeria monocytogenes. journal J Bacteriol volume 190 issue 18 pages 6264 70 year 2008 pmid ... glycine RF00504 6S SsrS RNA SsrS RF00013 Ribosomal protein L21 leader L21 RF00559 Ribosomal protein ... recognition particle RNA SRP RF00169 References reflist External links http rfam.sanger.ac.uk Rfam database ... more details
A conserved noncoding sequence CNS is a DNA sequence of noncoding DNA that is evolution arily Conserved sequence conserved . These sequences are of interest for their potential to gene regulation regulate gene production . ref name Hardison Cite journal last1 Hardison first1 RC. title Conserved noncoding sequences are reliable guides to regulatory elements. journal Trends Genet volume 16 issue 9 pages 369 72 month Sep year 2000 doi PMID 10973062 url http www.euchromatin.org Hardison1.htm ref CNSs in plants ref name Freeling Cite journal last1 Freeling first1 M last2 Subramaniam first2 S title ... cis acting regulatory elements . Conserved noncoding sequences can be important sites of evolutionary ... in noncoding sequences. journal Nature year 2007 pages 167 177 volume 447 issue 7141 pmid ... M. last2 Sumiyama first2 K. last3 Saitou first3 N. title Evolution of Conserved NonCoding Sequences ... first2 K. last3 Saitou first3 N. title Evolution of Conserved NonCoding Sequences Within the Vertebrate ... noncoding regions are thought to play a role in the evolution of eukaryotic complexity ... first1 Steven. last2 Gaut first2 BS. title Plant conserved noncoding sequences and paralogue evolution ... of sequence found mostly in eukaryotic organisms which interrupt the coding regions of genes, with basepair ... RNA transcripts , rather than in the introns. This suggests an important function operating at the post ... specific medicines that target RNA transcripts. ref name Jegga Cite journal last1 Jegga first1 AG. last2 ..., after the RNA template is degraded, a DNA strand complementary to the reverse transcribed ... is not highly sequence specific. The incorporation by LINE machinery of unrelated RNA transcripts gives rise to non functional processed pseudogenes. If a small gene s promoter is included in the transcribed ... into transcribed regions, alter rna splicing splicing patterns . A particular transposed element will be positively ... stronger than the selection in protein coding regions ref name Bejerano Cite journal last1 Bejerano ... more details
Orphan date August 2011 Infobox protein family Symbol Endonuclease NS Name Endonuclease NS image PDB 1smn EBI.jpg width caption identification of the serratia endonuclease dimer structural basis and implications for catalysis Pfam PF01223 Pfam clan CL0263 InterPro IPR001604 SMART PROSITE PDOC00821 MEROPS SCOP 1smn TCDB OPM family OPM protein CAZy CDD In molecular biology, enzymes in the DNA RNA non specific endonuclease family of bacteria l and eukaryotic endonucleases EC number 3.1.30. share the following characteristics they act on both DNA and RNA , bond cleavage cleave double stranded and single stranded nucleic acid s and require a divalent ion such as magnesium for their activity. A histidine has been shown to be essential for the activity of the Serratia marcescens nuclease . This residue chemistry residue is located in a conserved sequence conserved region which also contains an aspartic acid residue that could be implicated in the binding of the divalent ion. ref name pmid8078761 cite journal author Friedhoff P, Gimadutdinow O, Pingoud A title Identification of catalytically relevant amino acids of the extracellular Serratia marcescens endonuclease by alignment guided mutagenesis journal Nucleic Acids Res. volume 22 issue 16 pages 3280 7 year 1994 month August pmid 8078761 pmc 523719 doi 10.1093 nar 22.16.3280 url ref References reflist InterPro content IPR001604 Category Protein domains ... more details
wiktionary codingCoding may refer to Channel coding in coding theory Line coding Computer programming , the process of designing, writing, testing, debugging troubleshooting, and maintaining the source code of computer programs The process of Statistical classification of information Coding social sciences , refers to an analytical process in which data, in both quantitative form such as questionnaires results or qualitative such as interview transcripts are categorised to facilitate analysis Coding therapy , a controversial therapy used to treat addictions Legal coding , the process of creating summary or keyword data from a document. It is widely used in the legal profession to create a fast search index or database of documents for use in litigation A coding strand of DNA is translated into a protein product Present progressive tense for Code Blue emergency code Code Blue , which is a patient in Cardiac Arrest or Respiratory Arrest See also Code , a rule for converting a piece of information for example, a letter, word, phrase, or gesture into another form or representation one sign into another sign , not necessarily of the same type Entropy encoding , a lossless data compression scheme that is independent of the specific characteristics of the medium Source coding Medical coding disambiguation ... more details
, rRNA , snRNA s, and other noncodingRNA s, contain self complementary sequences that allow parts ... name transcriptome The most prominent examples of noncoding RNAs are transfer RNA tRNA and ribosomal ... noncoding RNAs involved in gene regulation, RNA processing and other roles. Certain RNAs are able ... ref cite journal author Mattick JS title Challenging the dogma the hidden layer of non protein coding ... article.cfm?articleID 00045BB6 5D49 1150 902F83414B7F4945 ref . These so called noncoding ... its intron s&mdash noncoding sections of the pre mRNA. The mRNA is then exported from the nucleus ... IPA en ra b .nju kle . k s d , or RNA , is one of the three major macromolecule s along with DNA and protein s that are essential for all known forms of life. Like DNA, RNA is made up of a long ... a nitrogenous base , a ribose sugar, and a phosphate group. The sequence of nucleotides allows RNA to encode genetic information. All cellular organisms use messenger RNA mRNA to carry the genetic information that directs the synthesis of proteins. In addition, some virus es use RNA instead of DNA as their genetic material perhaps a reflection of the suggested key role of RNA in the RNA world evolutionary history of life on Earth . ref Yarus, Michael 2011 . Getting Past the RNA World The Initial ... ref ref Cech TR. 2011 . The RNA Worlds in Context. Source Department of Chemistry and Biochemistry, Howard ... ref Like proteins, some RNA molecules play an active role in cells by catalyzing biological reactions ... molecules direct the assembly of proteins on ribosome s. This process uses transfer RNA tRNA molecules to deliver amino acids to the ribosome, where ribosomal RNA rRNA links amino acids together to form proteins. In 2011, it was demonstrated that the methylation of messenger RNA mRNA has a critical role in human energy balance biology energy homeostasis . This opens up the field of RNA epigenetics. ref http www.physorg.com news 2011 10 links common rna modification obesity.html ref The chemical ... more details
When referring to Transcription genetics DNA transcription , the coding strand is the DNA strand which has the same Nucleobase base sequence as the RNA transcript produced although with thymine replaced by uracil . It is this strand which contains codons , while the noncoding strand contains anti codons. Alternative terms for strands Wherever a gene exists on a DNA molecule , one strand is the coding strand or sense strand or non template strand , and the other is the noncoding strand also called the antisense strand antisense is a general term for a sequence of DNA or RNA that is complementary to mRNA http books.google.com books?id BrNpbPkzoxAC&pg PA129&lpg PA129&dq coding strand antisense&source web&ots t6yUAob0Km&sig O3UVL8ZYlFi0ljVYax8hp695sRo PPA75,M1 , anticoding strand, template strand, or transcribed strand . Strands in transcription bubble During Transcription genetics transcription , RNA polymerase unwinds a short section of the DNA double helix near the start of the gene. This unwound section is known as the transcription bubble . The RNA polymerase, and therefore the transcription bubble, travels along the noncoding strand in the opposite, 3 to 5 , direction, as well as polymerizing a newly synthesized strand in 5 to 3 or Upstream and downstream DNA downstream direction. The DNA double helix is rewound by RNA polymerase at the rear of the transcription bubble Lewin, pp 235 http books.google.com books?id BrNpbPkzoxAC&pg PA129&lpg PA129&dq coding strand antisense&source web&ots t6yUAob0Km&sig O3UVL8ZYlFi0ljVYax8hp695sRo PPA75,M1 . Like how a zipper works, only it unzips it and rezips it without going back and forth. RNA DNA hybrid Where the helix is unwound, the coding strand consists of unpaired bases, whilst the template strand consists of an RNA DNA composite ... nucleotides of the RNA transcript, complementary base paired to the template strand. The number ... York, USA. http books.google.com books?id BrNpbPkzoxAC&pg PA129&lpg PA129&dq coding strand antisense&source ... more details
The coding region of a gene , also known as the coding sequence or CDS , is that portion of a gene s DNA or RNA , composed of exon s, that codes for protein. The region is bounded nearer the Directionality molecular biology 5 end 5 end by a start codon and nearer the Directionality molecular biology 3 end 3 end with a stop codon . The coding region in mRNA is bounded by the five prime untranslated region and the three prime untranslated region , which are also parts of the exons. ref cite web last Twyman first Richard title Gene Structure publisher The Wellcome Trust date 1 August 2003 url http genome.wellcome.ac.uk doc WTD020755.html accessdate 6 April 2003 ref The coding region of an organism is sum total of the organism s genome that is composed of gene coding regions. ref Cite book last Goto et al. first Mami title Analysis of CpG Dinucleotide Frequency in Bacterial Genomes with Respect to Genomic Regions and Codon publisher The Fourth Annual International Conference on Computational Molecular Biology, Tokyo, Japan date April 8, 2000 url http recomb2000.ims.u tokyo.ac.jp Posters pdf 112.pdf accessdate 6 April 2009 ref Coding sequence annotation While identification of open reading frames within a DNA sequence is straightforward, identifying coding sequences is not, because the cell translates only a subset of all open reading frames to proteins. ref Citation last1 Furuno first1 Masaaki last2 Kasukawa first2 Takeya last3 Saito first3 Rintaro last4 Adachi first4 Jun last5 Suzuki first5 Harukazu last6 Baldarelli first6 Richard last7 Hayashizaki first7 Yoshihide last8 Okazaki first8 Yasushi title CDS Annotation in Full Length cDNA Sequence journal Genome Research volume 21 issue 9 pages 1478 1487 publisher Cold Spring Harbor Laboratory Press date September 2011 year 2011 url http genome.cshlp.org content 13 6b 1478.full.pdf html doi 10.1101 gr.1060303 accessdate 18 September ... that code not only for protein but also for other functional elements such as RNA genes and regulatory ... more details
Elias coding is term used for one of two types of lossless coding schemes used in digital communications Shannon Fano Elias coding , a precursor to arithmetic coding , in which probabilities are used to determine codewords Universal code data compression Universal coding using one of Elias three universal codes, each with predetermined codewords Elias delta coding Elias gamma coding Elias omega coding Disambig cs Eliasovy k dy ... more details
In coding theory and related engineering problems, coding gain is the measure in the difference between the signal to noise ratio SNR levels between the uncoded system and coded system required to reach the same bit error rate BER levels when used with the error correcting code ECC . Example If the uncoded BPSK system in AWGN environment has a Bit error rate BER of math 10 2 math at the SNR level 4 decibel dB , and the corresponding coded e.g. , BCH code BCH system has the same BER at an SNR level of 2.5dB, then we say the coding gain 4dB 2.5dB 1.5dB, due to the code used in this case BCH . Power limited regime In the power limited regime where the nominal spectral efficiency math rho le 2 math b 2D or b s Hz , i.e. the domain of binary signaling , the effective coding gain math gamma eff A math ... Pulse amplitude modulation PAM or 2× 2 Quadrature amplitude modulation QAM i.e. no coding . The nominal coding gain math gamma c A math is defined as math gamma c A d 2 min A over 4E b . math ... number of nearest neighbors per transmitted bit math K b A math is equal to one, the effective coding gain math gamma eff A math is approximately equal to the nominal coding gain math gamma c A math . However, if math K b A 1 math , the effective coding gain math gamma eff A math is less than the nominal coding gain math gamma c A math by an amount which depends on the steepness of the math P b ... is math rho 2k n math and the nominal coding gain is kd n . Example The table below lists the nominal spectral efficiency, nominal coding gain and effective coding gain at math P b E approx 10 ... limited regime math rho 2b 2D math , i.e. the domain of non binary signaling , the effective coding gain math gamma eff A math of a signal set math A math at a given target error rate ... QAM i.e. no coding . The nominal coding gain math gamma c A math is defined as math gamma c A 2 rho ... II, Lecture Notes sections 5.3, 5.5, 6.3, 6.4 Category Coding theory Category Error detection and correction ... more details
. Disadvantages of cowboy coding In cowboy coding, the lack of formal software project management ... developers Cowboy coding can be common at the hobbyist or student level where developers may initially ... more than just the basic coding a software project requires. This can result in time required ... with the client concerning requirements. Cowboy coding can accentuate this problem by not scaling ... iteration. Non managed projects may have few unit testing unit tests or working iterations, leaving an incomplete project unusable. Advantages of cowboy coding Developers maintain a free form working ... can begin with cowboy coding techniques before later selling them to commercial use or creating ... cowboy coding removes this burden. By coding in their own time, a hobby project may come to fruition ... cgi wiki?CowboyCoding Cowboy Coding definition at Wards Wiki http cowboyprogramming.com 2007 01 11 delving ... Coding Category Software development philosophies it Cowboy coding uk ... more details
Levenstein coding , or Levenshtein coding , is a universal code data compression universal code encoding the non negative integers developed by Vladimir Levenshtein . ref cite web url http www.compression.ru download articles int levenstein 1968 on the redundancy and delay.pdf title 1968 paper by V. I. Levenshtein in Russian ref ref cite book title Variable length codes for data compression author David Salomon publisher Springer year 2007 isbn 9781846289583 page 80 url http books.google.com books?id 81AfzW6vux4C&pg PA80&dq 22Levenstein coding 22&hl en&ei tYKZTIfzKJScsQP 1eWpAw&sa X&oi book result&ct result&resnum 3&ved 0CDgQ6AEwAg v onepage&q&f false ref The code of 0 number zero is 0 to code a positive number Initialize the step count variable C to 1. Write the binary numeral system binary representation of the number without the leading 1 to the beginning of the code. Let M be the number of bits written in step 2. If M is not 0, increment C , repeat from step 2 with M as the new number. Write C 1 bits and a 0 to the beginning of the code. The code begins 0 0 1 10 2 110 0 3 110 1 4 1110 0 00 5 1110 0 01 6 1110 0 10 7 1110 0 11 8 1110 1 000 9 1110 1 001 10 1110 1 010 11 1110 1 011 12 1110 1 100 13 1110 1 101 14 1110 1 110 15 1110 1 111 16 11110 0 00 0000 17 11110 0 00 0001 To decode a Levenstein coded integer Count the number of 1 bits until a 0 is encountered. If the count is zero, the value is zero, otherwise Start with a variable N , set it to a value of 1 and repeat count minus 1 times Read N bits, prepend 1 , assign the resulting value to N The Levenstein code of a positive integer is always one bit longer than the Elias omega coding Elias omega code of that integer. However, there is a Levenstein code for zero, whereas Elias omega coding would require the numbers to be shifted so that a zero is represented by the code for one instead. See also Elias omega coding Iterated logarithm References reflist Compression Methods DEFAULTSORT Levenshtein Coding Category Numeration ... more details
Merge from Correlation coding Independent spike coding Phase of firing code Population coding Rate coding Sparse coding Temporal coding NeuroElectroDynamics discuss Talk Neural coding Merger possibilities date July 2010 Neural coding is a neuroscience related field concerned with how sensory and other ... neural coding is to characterize the relationship between the Stimulus physiology stimulus and the individual ... coding scheme for neural networks , SJ Thorpe Parallel processing in neural systems, 1990 ref . Overview ... , amplitude and shape , they are typically treated as identical stereotyped events in neural coding ... Temporal coding ISI s between two successive spikes in a spike train often vary, apparently randomly ...? Nature Reviews Neuroscience 6 389 397 ref The study of neural coding involves measuring and characterizing ..., or certain aspects of that stimulus, from the spike sequences it evokes. Coding schemes A sequence, or train , of spikes may contain information based on different coding schemes. In motor neurons ... of the United States of America 94 12740 12741 ref Whether neurons use rate coding or temporal coding is a topic of intense debate within the neuroscience community, even though there is no clear definition of what these terms mean. Rate coding Rate coding is a traditional coding scheme, assuming ... rate increases, generally non linearly, with increasing stimulus intensity. ref name Kandel Kandel ..., rate coding is inefficient but highly robust with respect to the ISI noise . ref name Stein The concept ... rate coding, precisely calculating firing rate is very important. In fact, the term firing rate ... over time or an average over several repetitions of experiment. In rate coding, learning is based on activity ... problem with this approach is that it can not be the coding scheme used by neurons in the brain ... neuron and average over N repeated runs. Thus, the time dependent firing rate coding relies on the implicit assumption that there are always populations of neurons. Temporal coding Image with unknown ... more details
In digital communications , differential coding is a technique used to provide unambiguous signal reception when using some types of modulation . It makes data to be transmitted to depend not only on the current bit or symbol , but also on the previous one. The common types of modulation that require differential coding include phase shift keying and quadrature amplitude modulation . Purposes of differential coding To demodulate BPSK one needs to make a local oscillator synchronous with the remote one. This is accomplished by a carrier recovery circuit. However, a carrier can be recovered in different ways, depending upon a valid phases count 2 for BPSK . For this coding, if a carrier is recovered incorrectly, the received data are inverted. Assuming that math x i math is a bit intended for transmission, and math y i math is a bit actually transmitted differentially encoded , if math y i y i 1 oplus x i, qquad 1 math is transmitted, then on the decoding side math x i y i oplus y i 1 . qquad 2 math can be reconstructed, where math oplus math indicates binary addition binary or modular ... differential coding Image Differential coding encoder.png right thumb A differential encoder Image Differential coding decoder.png right thumb A differential decoder A method illustrated above can ... frame synchronizer and sometimes it isn t. Generally speaking, a differential coding applies to symbols ... and infinite impulse response IIR , the latter is non recursive and thus finite impulse response .... Generalized differential coding Using the relation math y i 1 oplus x i y i math is not the only ... y 0 math and math u 0 math . Applications Differential coding is widely used in satellite communications ... and QAM modulations. Drawbacks Differential coding has one significant drawback it leads to error ... to resolve a phase ambiguity Differential coding is not the only way to deal with a phase ambiguity ... Station Standard IESS 308 Digital Video Broadcasting DVB framing structure, channel coding and modulation ... more details
Unary coding , sometimes called thermometer code , is an entropy encoding that represents a natural number , n , with n ones followed by a zero if natural number is understood as non negative integer or with n &minus 1 ones followed by a zero if natural number is understood as strictly positive integer . For example 5 is represented as 111110 or 11110. Some representations use n or n &minus 1 zeros followed by a one. The ones and zeros are interchangeable without loss of generality. table border 1 cellpadding 2 tr th n non negative th n strictly positive th Unary code th Alternative tr td 0 td 1 td 0 td 1 tr td 1 td 2 td 10 td 01 tr td 2 td 3 td 110 td 001 tr td 3 td 4 td 1110 td 0001 tr td 4 td 5 td 11110 td 00001 tr td 5 td 6 td 111110 td 000001 tr td 6 td 7 td 1111110 td 0000001 tr td 7 td 8 td 11111110 td 00000001 tr td 8 td 9 td 111111110 td 000000001 tr td 9 td 10 td 1111111110 td 0000000001 table Unary coding is an optimally efficient encoding for the following discrete probability distribution math operatorname P n 2 n , math for math n 1,2,3,... math . In symbol by symbol coding, it is optimal for any geometric distribution math operatorname P n k 1 k n , math for which k &ge &phi 1.61803398879&hellip , the golden ratio , or, more generally, for any discrete distribution for which math operatorname P n ge operatorname P n 1 operatorname P n 2 , math for math n 1,2,3,... math . Although it is the optimal symbol by symbol coding for such probability distributions, Golomb coding achieves better compression capability for the geometric distribution because it does not consider input symbols independently, but rather implicitly groups the inputs ... index schemes like the Golomb Rice code . Unary coding is Prefix free code prefix free , and can ... ed, Morgan Kaufmann. Professor K.R Rao, EE5359 Principles of Digital Video Coding . Compression Methods Category Coding theory Category Data compression Category Lossless compression algorithms es C digo ... more details
code words can have effectively non integer bit lengths, whereas code words in Huffman coding can ... x 1 10010 In computer science and information theory , Huffman coding is an entropy encoding algorithm ... for the Construction of Minimum Redundancy Codes . Huffman coding uses a specific method for choosing ... probability distribution and a number of members which is a power of two , Huffman coding is equivalent to simple binary Block code block encoding , e.g., ASCII coding. Huffman coding is such a widespread ... s original algorithm is optimal for a symbol by symbol coding i.e. a stream of unrelated symbols with a known ... e.g., cat is more common than cta . Other methods such as arithmetic coding and LZW coding often have ... efficient coding, and generally adapt to the actual input statistics, the latter of which is useful ..., the limitations of Huffman coding should not be overstated it can be used adaptively, accommodating ... code. Huffman avoided the major flaw of the suboptimal Shannon Fano coding by building the tree ... symbol a sub i sub with non null probability is math h a i log 2 1 over w i . math The information entropy entropy H in bits is the weighted sum, across all symbols a sub i sub with non zero probability ... probability can be left out of the formula above. As a consequence of Shannon s source coding theorem ... Image Huffman coding example.svg thumb right 250px A source generates 4 different symbols math a 1 ... will retain the mathematical optimality of the Huffman coding while both minimizing variance ... coding is optimal when the probability of each input symbol is a negative power of two. Prefix ... or variable length before Huffman coding helps both to reduce that inefficiency and to take advantage ... language text . The worst case for Huffman coding can happen when the probability of a symbol exceeds ..., Golomb coding is a provably optimal run length code. Arithmetic coding produces some gains over Huffman coding, although arithmetic coding has higher computational complexity. Also, arithmetic coding ... more details
Merge to Neural coding discuss Talk Neural coding Merger possibilities date July 2010 The temporal coding is a type of neural coding which relies on precise timing of action potential s or inter spike interval s. Combined with traditional rate coding models, temporal coding can provide additional information with the same rate. There is no precise definition of temporal code. Actually almost any coding scheme that is not rate coding can be referred to as a temporal code. Unlike rate coding, the temporal coding model tries to account for short term stimuli producing a small number of spikes. For example, if a neuron is capable of firing at a maximum rate of 100 spikes per second, then a stimulus 10ms would likely elicit only a single spike. This model is especially important for sound localization , which occurs within the brain on the order of milliseconds. The discovery of spike timing dependent plasticity , where synaptic efficacy is modulated by the precise timing of spikes, provides strong evidence that temporal codes are used for cortical information transmission. It should not be confused with the coding of the temporal information. See also Sparse coding Independent spike coding Correlation coding Population coding Neural synchronization References Vanrullen, R., Guyonneau, R., and Thorpe, S. 2005 . Spike times make sense. Trends in Neurosciences , 28 1 1 4. Rullen, R. V. and Thorpe, S. J. 2001 . Rate Coding Versus Temporal Order Coding What the Retinal Ganglion Cells Tell the Visual Cortex. Neural Computation , 13 6 1255 1283. Dayan P, Abbott LF. Theoretical Neuroscience Computational and Mathematical Modeling of Neural Systems . Cambridge, Massachusetts The MIT Press 2001. ISBN 0 262 04199 5 Rieke F, Warland D, de Ruyter van Steveninck R, Bialek W. Spikes Exploring the Neural Code . Cambridge, Massachusetts The MIT Press 1999. ISBN 0 262 68108 0 Theunissen F, Miller ..., 2, 149 162 1995. Category Neural coding neuroscience stub ... more details
Unreferenced date December 2008 Notability Notability date December 2008 Diversity coding is a particular technique for antenna diversity and is implemented by Space time code space time coding . Category Radio resource management wireless stub ... more details
Arithmetic coding is a form of variable length code variable length entropy encoding used in lossless ... in fewer bits used in total. Arithmetic coding differs from other forms of entropy encoding such as Huffman coding in that rather than separating the input into component symbols and replacing each with a code, arithmetic coding encodes the entire message into a single number, a fraction n where ... P , see source coding theorem . Compression algorithms that use arithmetic coding start ... can even be adaptive coding adaptive , so that they continuously change their prediction of the data ... coding methods like arithmetic encoding can produce an output message that is larger than the input message, especially if the probability model is off. Adaptive arithmetic coding One advantage of arithmetic coding over other similar methods of data compression is the convenience of adaptation. Adaptation ... of symbols occurring during the encoding and decoding process. Adaptive arithmetic coding significantly ... better in the result. Precision and renormalization The above explanations of arithmetic coding contain ... 1111111 1 0101011 0 1111111 1 Arithmetic coding as a generalized change of radix Recall that in the case where the symbols had equal probabilities, arithmetic coding could be implemented by a simple change of base, or radix. In general, arithmetic and range coding may be interpreted as a generalized ... Connections with other compression methods Huffman coding Main Huffman coding There is great similarity between arithmetic coding and Huffman coding in fact, it has been shown that Huffman is just a specialized case of arithmetic coding but because arithmetic coding translates the entire message ... of 1 3, Huffman coding may produce the following code a tt 0 tt 50 b tt 10 tt 25 c tt 11 tt 25 This code has an expected 2 2 1 3 1.667 bits per symbol for Huffman coding, an inefficiency of 5 percent compared to log sub 2 sub 3 1.585 bits per symbol for arithmetic coding. For an alphabet 0 ... more details
Golomb coding is a lossless data compression method using a family of data compression codes invented ... code as an optimal prefix code , making Golomb coding highly suitable for situations in which the occurrence of small values in the input stream is significantly more likely than large values. Rice coding ... but possibly suboptimal prefix code Rice used this in an adaptive coding scheme, although Rice coding can refer to either that scheme or merely using that subset of Golomb codes. Whereas a Golomb ... and division by 2 can be implemented more efficiently in binary arithmetic . Rice coding ... methods. Overview Construction of codes Golomb coding uses a tunable parameter M to divide an input .... The quotient is sent in unary coding , followed by the remainder in truncated binary encoding . When math M 1 math Golomb coding is equivalent to unary coding. Image golomb rice code.svg Golomb ... to encode sequences of non negative numbers. However it is easily extended to accept sequences containing ..., where the remainder code uses simple truncated binary encoding, also named Rice coding other varying ... format Quotient Code Remainder Code , where Quotient Code in unary coding Write a q length string of 1 ... 1 2, Golomb coding can be used to encode runs of zero or more P nowiki nowiki s separated ... after the Linear predictive coding linear prediction step called adaptive FIR filter in Apple Lossless . Rice coding is also used in the FELICS lossless image codec. The Golomb Rice coder is used in the entropy coding stage of Rice Algorithm based lossless image codecs . One such experiment yields ... value and adding one if the input is negative , and then Rice Golomb coding is applied by varying ... ratios In those results, the Rice coding may create very long sequences of one bits for the quotient ... Variable Length Coding for Efficient Compression of Spacecraft Television Data, IEEE Transactions ... Universal Noiseless Coding Techniques, Jet Propulsion Laboratory, Pasadena, California, JPL Publication ... more details
Orphan date February 2009 Legal coding is the process of creating summary or keyword data from a document. It is widely used in the legal profession to create a fast search index or database of documents for use in litigation . Objective coding Objective coding is creating an index of Objectivity philosophy objective summary data from a document, and if discoverable , would include such information as dates, author, recipient and title. Subjective coding Subjective coding is the indexing of documents around subjectivity subjective data. This may be gleaned from templates, or more usually from a subjective reading by someone familiar with the topic. This is the more realiable way to determine factors such as importance of the document. External links http www.cenzatech.com legal.html http www.integra india.com litigation services.htm http www.intercomindia.com legal coding objective coding.html http www.intercomindia.com legal coding subjective coding.html http www.cchworkflow.com.au processing services coding.html http www.allzonems.com litigation outsource.htm DEFAULTSORT Legal Coding Category Legal citation Category Document management systems ... more details
cleanup date May 2011 Zen Coding is a set of Plug in computing plug ins for text editors that allow for high speed coding and editing in HTML , XML , Extensible Stylesheet Language XSL , and other structured code formats. The project was created by Sergey Chikuyonok in 2009 and continues to be actively developed by Chikuyonok and Zen Coding users. The tools have been incorporated into a number of high profile text editor s, some plug ins developed by the Zen Coding team and others implemented independently. However, Zen Coding is primarily independent from any text editor, as the engine works directly ... 21 zen coding a new way to write html code Smashing Magazine Zen Coding A Speedy Way To Write HTML CSS Code ref Zen Coding is an open source code distributed under an MIT License . Functions Expand abbreviations Zen Coding uses a specific syntax in order to expand small snippets of code, similar to CSS selectors, into full fledged HTML code. ref http mondaybynoon.com 2009 08 17 the art of zen coding bringing snippets to a new level Monday By Noon The Art of zen coding Bringing Snippets to a New ... www.downloadsquad.com 2010 04 30 if you code html zen coding will change your life Download Squad Review ... at the current cursor position. Unlike other HTML pair matchers, Zen Coding searches from the cursors ... 2009 11 21 zen coding a new way to write html code Smashing Magazine Zen Coding A Speedy ... Coding team Eclipse software Aptana Eclipse cross platform . TextMate Mac . Coda web development ... text editor plug ins were developed by third party groups with the official Zen Coding engine Adobe ... text editor plug ins were developed independently and with a different Zen Coding engine Emacs cross ... Windows Vim cross platform References Reflist External links http code.google.com p zen coding Zen Coding Google Project Page http www.emeditor.com modules feature1 rewrite tc 37.html How to Use Zen Coding Category Application programming interfaces ko ru Zen Coding ... more details
Merge to Neural coding discuss Talk Neural coding Merger possibilities date July 2010 The rate coding model of neuron al firing communication states that as the intensity of a stimulus increases the frequency or rate of action potential s, or spike firing , increases. Rate coding is sometimes called frequency coding . This phenomenon was originally shown by Edgar Adrian ED Adrian and Yngve Zotterman Y Zotterman in 1926. ref cite journal title The impulses produced by sensory nerve endings Part II The response of a single end organ. author Adrian ED & Zotterman Y. journal J Physiol Lond. year 1926 volume 61 pages 151 171 http www.ncbi.nlm.nih.gov pmc articles PMC1514782 ref In this simple experiment different weights were hung from a muscle . As the weight of the stimulus increased, the number of spikes recorded from sensory nerves innervating the muscle also increased. From these original experiments Adrian and Zotterman concluded that action potentials were unitary events, and that the frequency of events, and not individual event magnitude, was the basis for most inter neuronal communication. See also Neural coding Temporal coding Sparse coding Independent spike coding Correlation coding Population coding References references Dayan P & Abbott LF. Theoretical Neuroscience Computational and Mathematical Modeling of Neural Systems . Cambridge, Massachusetts The MIT Press 2001. ISBN 978 0 262 04199 7 Rieke F, Warland D, de Ruyter van Steveninck R, Bialek W. Spikes Exploring the Neural Code . Cambridge, Massachusetts The MIT Press 1999. ISBN 978 0 262 68108 7 Category Neural coding neuroscience stub ... more details
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