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<title>arithenco</title>
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@import url("scilab_code.css");
@import url("xml_code.css");
@import url("c_code.css");
@import url("style.css");
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<span class="path" dir="ltr"><a href="index.html">FOSSEE_Communication_Systems_Toolbox</a> >> <a href="section_1f049b1e3111e3d1d538e7603f77f589.html">FOSSEE_Communication_Systems_Toolbox</a> > arithenco</span>
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<div class="refnamediv"><h1 class="refname">arithenco</h1>
<p class="refpurpose">This function encodes the given sequence using aritmetic coding</p></div>
<div class="refsynopsisdiv"><h3 class="title">Syntax</h3>
<div class="synopsis"><pre><span class="default">CODE</span><span class="default"> = </span><span class="default">ARITHENCO</span><span class="default">(</span><span class="default">SEQ</span><span class="default">, </span><span class="default">COUNT</span><span class="default">)</span></pre></div></div>
<div class="refsection"><h3 class="title">Description</h3>
<p class="para">CODE = ARITHENCO(SEQ, COUNT) encodes the given sequence (SEQ) using arithmetic coding.
COUNT is vector whihc gives information about the source statistics (i.e. frequency of each symbol in the source alphabet)
CODE is the binary arithmetic code
Source Alphabet is assumed to be {1,2,....N} where N is a positive integer
Therefore, sequence should be finite and positive
Length of the COUNT should match the length of the source alphabet</p>
<p class="para"></p></div>
<div class="refsection"><h3 class="title">Examples</h3>
<div class="programlisting"><table border="0" width="100%"><tr><td width="98%"><pre class="scilabcode"><span class="scilabid">counts</span> <span class="scilaboperator">=</span> <span class="scilabopenclose">[</span><span class="scilabnumber">40</span> <span class="scilabnumber">1</span> <span class="scilabnumber">9</span><span class="scilabopenclose">]</span><span class="scilabdefault">;</span>
<span class="scilabid">len</span> <span class="scilaboperator">=</span> <span class="scilabnumber">4</span><span class="scilabdefault">;</span>
<span class="scilabid">seq</span> <span class="scilaboperator">=</span> <span class="scilabopenclose">[</span><span class="scilabnumber">1</span> <span class="scilabnumber">3</span> <span class="scilabnumber">2</span> <span class="scilabnumber">1</span><span class="scilabopenclose">]</span>
<span class="scilabid">code</span> <span class="scilaboperator">=</span> <span class="scilabid">arithenco</span><span class="scilabopenclose">(</span><span class="scilabid">seq</span><span class="scilabdefault">,</span><span class="scilabid">counts</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span>
<a class="scilabcommand" href="scilab://disp">disp</a><span class="scilabopenclose">(</span><span class="scilabid">code</span><span class="scilabopenclose">)</span></pre></td><td valign="top"><a href="scilab://scilab.execexample/"><img src="ScilabExecute.png" border="0"/></a></td><td valign="top"><a href="scilab://scilab.editexample/"><img src="ScilabEdit.png" border="0"/></a></td><td></td></tr></table></div></div>
<div class="refsection"><h3 class="title">Bibliography</h3>
<p class="para">Sayood, K., Introduction to Data Compression, Morgan Kaufmann, 2000, Chapter 4, Section 4.4.3.</p></div>
<div class="refsection"><h3 class="title">Authors</h3>
<ul class="itemizedlist"><li class="member">Pola Lakshmi Priyanka, IIT Bombay</li></ul></div>
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