modules/sound/help/en_US/mu2lin.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!--
    * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
    * Copyright (C) ????-2006 - INRIA - Scilab 
    * 
    * This file must be used under the terms of the CeCILL.
    * This source file is licensed as described in the file COPYING, which
    * you should have received as part of this distribution.  The terms
    * are also available at    
    * http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
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<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="en" xml:id="mu2lin">
    <refnamediv>
        <refname>mu2lin</refname>
        <refpurpose>mu-law encoding to linear signal</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Calling Sequence</title>
        <synopsis>mu=lin2mu(y)</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Arguments</title>
        <variablelist>
            <varlistentry>
                <term>y</term>
                <listitem>
                    <para>real vector</para>
                </listitem>
            </varlistentry>
            <varlistentry>
                <term>mu</term>
                <listitem>
                    <para>real vector</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>Description</title>
        <para>
            Utility fct: <literal>y=mu2lin(mu)</literal> converts mu-law encoded 8-bit audio signals,
            stored in the range 0 &lt;= mu &lt;= 255, to linear signal amplitude in 
            the range -s &lt; y &lt; s where s = 32124/32768 ~= .9803.  
            The input mu is often obtained using mget(...,'uc') to read 
            byte-encoded audio files.   Translation of C program by Craig Reese: 
            IDA/Supercomputing Research Center Joe Campbell: Department of Defense
        </para>
    </refsection>
    <refsection role="see also">
        <title>See Also</title>
        <simplelist type="inline">
            <member>
                <link linkend="mu2lin">mu2lin</link>
            </member>
        </simplelist>
    </refsection>
</refentry>