<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>GNU Radio 3.2.2 C++ API: cvsd_encode_sb.h File Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.7.3 --> <div id="top"> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">GNU Radio 3.2.2 C++ API</div> </td> </tr> </tbody> </table> </div> </div> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> initNavTree('cvsd__encode__sb_8h.html',''); </script> <div id="doc-content"> <div class="header"> <div class="summary"> <a href="#nested-classes">Classes</a> | <a href="#func-members">Functions</a> </div> <div class="headertitle"> <h1>cvsd_encode_sb.h File Reference</h1> </div> </div> <div class="contents"> <div class="textblock"><code>#include <gr_sync_decimator.h></code><br/> </div><div class="textblock"><div class="dynheader"> Include dependency graph for cvsd_encode_sb.h:</div> <div class="dyncontent"> <div class="center"><img src="cvsd__encode__sb_8h__incl.png" border="0" usemap="#cvsd__encode__sb_8h" alt=""/></div> <map name="cvsd__encode__sb_8h" id="cvsd__encode__sb_8h"> </map> </div> </div> <p><a href="cvsd__encode__sb_8h_source.html">Go to the source code of this file.</a></p> <table class="memberdecls"> <tr><td colspan="2"><h2><a name="nested-classes"></a> Classes</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="classcvsd__encode__sb.html">cvsd_encode_sb</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">This block performs CVSD audio encoding. Its design and implementation is modeled after the CVSD encoder/decoder specifications defined in the Bluetooth standard. <a href="classcvsd__encode__sb.html#_details">More...</a><br/></td></tr> <tr><td colspan="2"><h2><a name="func-members"></a> Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classboost_1_1shared__ptr.html">cvsd_encode_sb_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="cvsd__encode__sb_8h.html#a81a1b827a4ae3d3f532b1fa22a2c2a25">cvsd_make_encode_sb</a> (short min_step=10, short max_step=1280, double step_decay=0.9990234375, double accum_decay=0.96875, int K=32, int J=4, short pos_accum_max=32767, short neg_accum_max=-32767)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor parameters to initialize the CVSD encoder. The default values are modeled after the Bluetooth standard and should not be changed except by an advanced user. <a href="#a81a1b827a4ae3d3f532b1fa22a2c2a25"></a><br/></td></tr> </table> <hr/><h2>Function Documentation</h2> <a class="anchor" id="a81a1b827a4ae3d3f532b1fa22a2c2a25"></a><!-- doxytag: member="cvsd_encode_sb.h::cvsd_make_encode_sb" ref="a81a1b827a4ae3d3f532b1fa22a2c2a25" args="(short min_step=10, short max_step=1280, double step_decay=0.9990234375, double accum_decay=0.96875, int K=32, int J=4, short pos_accum_max=32767, short neg_accum_max=-32767)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">cvsd_encode_sb_sptr</a> cvsd_make_encode_sb </td> <td>(</td> <td class="paramtype">short </td> <td class="paramname"><em>min_step</em> = <code>10</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">short </td> <td class="paramname"><em>max_step</em> = <code>1280</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"><em>step_decay</em> = <code>0.9990234375</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">double </td> <td class="paramname"><em>accum_decay</em> = <code>0.96875</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>K</em> = <code>32</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>J</em> = <code>4</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">short </td> <td class="paramname"><em>pos_accum_max</em> = <code>32767</code>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">short </td> <td class="paramname"><em>neg_accum_max</em> = <code>-32767</code> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div> <div class="memdoc"> <p>Constructor parameters to initialize the CVSD encoder. The default values are modeled after the Bluetooth standard and should not be changed except by an advanced user. </p> <dl><dt><b>Parameters:</b></dt><dd> <table class="params"> <tr><td class="paramname">min_step</td><td>Minimum step size used to update the internal reference. Default: "10" </td></tr> <tr><td class="paramname">max_step</td><td>Maximum step size used to update the internal reference. Default: "1280" </td></tr> <tr><td class="paramname">step_decay</td><td>Decay factor applied to step size when there is not a run of J output 1s or 0s. Default: "0.9990234375" (i.e. 1-1/1024) </td></tr> <tr><td class="paramname">accum_decay</td><td>Decay factor applied to the internal reference during every interation of the codec. Default: "0.96875" (i.e. 1-1/32) </td></tr> <tr><td class="paramname">K;</td><td>Size of shift register; the number of output bits remembered by codec (must be less or equal to 32). Default: "32" </td></tr> <tr><td class="paramname">J;</td><td>Number of bits in the shift register that are equal; i.e. the size of a run of 1s, 0s. Default: "4" </td></tr> <tr><td class="paramname">pos_accum_max</td><td>Maximum integer value allowed for the internal reference. Default: "32767" (2^15 - 1 or MAXSHORT) </td></tr> <tr><td class="paramname">neg_accum_max</td><td>Minimum integer value allowed for the internal reference. Default: "-32767" (-2^15 + 1 or MINSHORT+1) </td></tr> </table> </dd> </dl> </div> </div> </div> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="cvsd__encode__sb_8h.html">cvsd_encode_sb.h</a> </li> <li class="footer">Generated on Thu Feb 17 2011 for GNU Radio 3.2.2 C++ API by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </li> </ul> </div> </body> </html>