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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"><html><head> <title>Description of pv2note</title> <meta name="keywords" content="pv2note"> <meta name="description" content="pv2note: Note segmentation on a give pitch vector"> <meta http-equiv="Content-Type" content="text/html; charset=big5"> <meta name="generator" content="m2html © 2003 Guillaume Flandin"> <meta name="robots" content="index, follow"> <link type="text/css" rel="stylesheet" href="../m2html.css"></head><body><a name="_top"></a><div><a href="../index.html">Home</a> > <a href="index.html">melodyRecognition</a> > pv2note.m</div><!--<table width="100%"><tr><td align="left"><a href="../index.html"><img alt="<" border="0" src="../left.png"> Master index</a></td><td align="right"><a href="index.html">Index for melodyRecognition <img alt=">" border="0" src="../right.png"></a></td></tr></table>--><h1>pv2note</h1><h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>pv2note: Note segmentation on a give pitch vector</strong></div><h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="box"><strong>function note = pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt) </strong></div><h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="fragment"><pre class="comment"> pv2note: Note segmentation on a give pitch vector
Usage: note = pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt)
For example:
pv=[49.21841 48.33041 48.33041 47.76274 48.04425 48.04425 47.76274 48.33041 48.04425 48.04425 48.04425 47.48574 47.48574 47.48574 47.48574 47.48574 47.76274 48.04425 48.04425 47.76274 47.76274 47.76274 47.21309 47.21309 47.21309 47.21309 47.21309 51.48682 51.48682 51.48682 51.48682 51.83658 51.83658 51.83658 51.83658 51.83658 54.92247 54.09792 54.09792 54.09792 54.09792 54.09792 54.09792 54.92247 54.92247 54.92247 54.92247 54.50529 54.50529 54.92247 54.50529 54.50529 54.09792 54.50529 55.34996 54.92247 54.92247 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 53.31086 53.31086 53.31086 53.31086 56.23796 55.78827 55.78827 56.23796 56.69965 56.69965 56.69965 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 57.17399 57.17399 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 59.76274 59.76274 59.76274 59.21309 59.21309 59.21309 58.68037 58.68037 58.68037 58.68037 54.09792 54.09792 54.09792 54.50529 54.50529 54.09792 54.09792 54.50529 54.92247 54.50529 54.50529 54.09792 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 50.47805 51.48682 51.83658 52.19354 52.55803 52.19354 52.55803 51.83658 51.83658 52.55803 52.93035 52.93035 52.93035 52.93035 52.93035 51.14399 51.14399 54.50529 53.31086 52.55803 52.19354 52.19354 52.19354 52.55803 52.93035 54.09792 54.50529 54.92247 55.78827 56.23796 56.23796 55.78827 55.34996 54.09792 54.09792 54.09792 51.48682 50.15444 50.15444 50.80782 51.14399 51.14399 51.14399 51.14399 52.19354 52.19354 51.83658 51.83658 51.83658 51.48682 51.48682 51.48682 51.83658 51.83658 51.48682 51.48682 51.48682 51.48682 51.48682 50.80782 50.80782 52.55803 51.48682 51.14399 50.80782 51.14399 51.48682 51.48682 51.48682 50.80782 50.80782 50.80782 48.91732 48.62138 48.33041 48.33041 48.33041 48.04425 48.91732 48.91732 48.91732 49.21841 49.21841 48.91732 48.62138 48.33041 48.33041 48.33041 49.83678 48.62138 48.62138 48.62138 48.62138 48.62138 48.91732 49.52484 49.52484 48.91732 48.62138 48.33041];
timeUnit=256/8000;
pitchTh=0.8;
minNoteDuration=0.1;
plotOpt=1;
note=pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt);
fprintf('Hit return to hear the pitch vector...'); pause; fprintf('\n');
pvPlay(pv, timeUnit);
fprintf('Hit return to hear the segmented note...'); pause; fprintf('\n');
notePlay(note);</pre></div><!-- crossreference --><h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>This function calls:<ul style="list-style-image:url(../matlabicon.gif)"></ul>This function is called by:<ul style="list-style-image:url(../matlabicon.gif)"><li><a href="pv2midiFile.html" class="code" title="function pv2midiFile(pitchVec, pitchRate, midiFile)">pv2midiFile</a> pv2midiFile: Pitch vector to midi file conversion</li></ul><!-- crossreference --><h2><a name="_subfunctions"></a>SUBFUNCTIONS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><ul style="list-style-image:url(../matlabicon.gif)"><li><a href="#_sub1" class="code">function selfdemo</a></li></ul><h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2><div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function note = pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt)</a>0002 <span class="comment">% pv2note: Note segmentation on a give pitch vector</span>0003 <span class="comment">% Usage: note = pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt)</span>0004 <span class="comment">%</span>0005 <span class="comment">% For example:</span>0006 <span class="comment">% pv=[49.21841 48.33041 48.33041 47.76274 48.04425 48.04425 47.76274 48.33041 48.04425 48.04425 48.04425 47.48574 47.48574 47.48574 47.48574 47.48574 47.76274 48.04425 48.04425 47.76274 47.76274 47.76274 47.21309 47.21309 47.21309 47.21309 47.21309 51.48682 51.48682 51.48682 51.48682 51.83658 51.83658 51.83658 51.83658 51.83658 54.92247 54.09792 54.09792 54.09792 54.09792 54.09792 54.09792 54.92247 54.92247 54.92247 54.92247 54.50529 54.50529 54.92247 54.50529 54.50529 54.09792 54.50529 55.34996 54.92247 54.92247 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 53.31086 53.31086 53.31086 53.31086 56.23796 55.78827 55.78827 56.23796 56.69965 56.69965 56.69965 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 57.17399 57.17399 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 59.76274 59.76274 59.76274 59.21309 59.21309 59.21309 58.68037 58.68037 58.68037 58.68037 54.09792 54.09792 54.09792 54.50529 54.50529 54.09792 54.09792 54.50529 54.92247 54.50529 54.50529 54.09792 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 50.47805 51.48682 51.83658 52.19354 52.55803 52.19354 52.55803 51.83658 51.83658 52.55803 52.93035 52.93035 52.93035 52.93035 52.93035 51.14399 51.14399 54.50529 53.31086 52.55803 52.19354 52.19354 52.19354 52.55803 52.93035 54.09792 54.50529 54.92247 55.78827 56.23796 56.23796 55.78827 55.34996 54.09792 54.09792 54.09792 51.48682 50.15444 50.15444 50.80782 51.14399 51.14399 51.14399 51.14399 52.19354 52.19354 51.83658 51.83658 51.83658 51.48682 51.48682 51.48682 51.83658 51.83658 51.48682 51.48682 51.48682 51.48682 51.48682 50.80782 50.80782 52.55803 51.48682 51.14399 50.80782 51.14399 51.48682 51.48682 51.48682 50.80782 50.80782 50.80782 48.91732 48.62138 48.33041 48.33041 48.33041 48.04425 48.91732 48.91732 48.91732 49.21841 49.21841 48.91732 48.62138 48.33041 48.33041 48.33041 49.83678 48.62138 48.62138 48.62138 48.62138 48.62138 48.91732 49.52484 49.52484 48.91732 48.62138 48.33041];</span>0007 <span class="comment">% timeUnit=256/8000;</span>0008 <span class="comment">% pitchTh=0.8;</span>0009 <span class="comment">% minNoteDuration=0.1;</span>0010 <span class="comment">% plotOpt=1;</span>0011 <span class="comment">% note=pv2note(pv, timeUnit, pitchTh, minNoteDuration, plotOpt);</span>0012 <span class="comment">% fprintf('Hit return to hear the pitch vector...'); pause; fprintf('\n');</span>0013 <span class="comment">% pvPlay(pv, timeUnit);</span>0014 <span class="comment">% fprintf('Hit return to hear the segmented note...'); pause; fprintf('\n');</span>0015 <span class="comment">% notePlay(note);</span>0016 0017 <span class="comment">% Roger Jang, 20060527, 20070531</span>0018 0019 <span class="keyword">if</span> nargin<1, <a href="#_sub1" class="code" title="subfunction selfdemo">selfdemo</a>; <span class="keyword">return</span>; <span class="keyword">end</span>0020 <span class="keyword">if</span> nargin<2, timeUnit=256/8000; <span class="keyword">end</span>0021 <span class="keyword">if</span> nargin<3, pitchTh=0.8; <span class="keyword">end</span>0022 <span class="keyword">if</span> nargin<4, minNoteDuration=0.1; <span class="keyword">end</span>0023 <span class="keyword">if</span> nargin<5, plotOpt=0; <span class="keyword">end</span>0024 0025 note=[];0026 sameNotePv=pv(1);0027 <span class="keyword">for</span> i=2:length(pv)0028 notePitch=median(sameNotePv);0029 noteDuration=length(sameNotePv)*timeUnit;0030 <span class="keyword">if</span> abs(pv(i)-pv(i-1))>pitchTh & noteDuration>minNoteDuration <span class="comment">% If the pitch diff. is high and note duration is long...</span>0031 note=[note, notePitch, length(sameNotePv)*timeUnit]; <span class="comment">% The time unit is 1 second</span>0032 sameNotePv=pv(i);0033 <span class="keyword">else</span>0034 sameNotePv=[sameNotePv, pv(i)];0035 <span class="keyword">end</span>0036 <span class="keyword">end</span>0037 <span class="comment">% Process the last note</span>0038 note=[note, median(sameNotePv), length(sameNotePv)*timeUnit]; <span class="comment">% The time unit is 1 second</span>0039 0040 <span class="keyword">if</span> plotOpt0041 plot((1:length(pv))*timeUnit, pv, <span class="string">'.-g'</span>);0042 hold on; noteplot(note, 1); hold off0043 <span class="keyword">end</span>0044 0045 <span class="comment">% ====== Self demo</span>0046 <a name="_sub1" href="#_subfunctions" class="code">function selfdemo</a>0047 pv=[49.21841 48.33041 48.33041 47.76274 48.04425 48.04425 47.76274 48.33041 48.04425 48.04425 48.04425 47.48574 47.48574 47.48574 47.48574 47.48574 47.76274 48.04425 48.04425 47.76274 47.76274 47.76274 47.21309 47.21309 47.21309 47.21309 47.21309 51.48682 51.48682 51.48682 51.48682 51.83658 51.83658 51.83658 51.83658 51.83658 54.92247 54.09792 54.09792 54.09792 54.09792 54.09792 54.09792 54.92247 54.92247 54.92247 54.92247 54.50529 54.50529 54.92247 54.50529 54.50529 54.09792 54.50529 55.34996 54.92247 54.92247 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 54.50529 53.31086 53.31086 53.31086 53.31086 56.23796 55.78827 55.78827 56.23796 56.69965 56.69965 56.69965 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 57.17399 57.17399 57.17399 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 56.69965 59.76274 59.76274 59.76274 59.21309 59.21309 59.21309 58.68037 58.68037 58.68037 58.68037 54.09792 54.09792 54.09792 54.50529 54.50529 54.09792 54.09792 54.50529 54.92247 54.50529 54.50529 54.09792 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 53.69992 50.47805 51.48682 51.83658 52.19354 52.55803 52.19354 52.55803 51.83658 51.83658 52.55803 52.93035 52.93035 52.93035 52.93035 52.93035 51.14399 51.14399 54.50529 53.31086 52.55803 52.19354 52.19354 52.19354 52.55803 52.93035 54.09792 54.50529 54.92247 55.78827 56.23796 56.23796 55.78827 55.34996 54.09792 54.09792 54.09792 51.48682 50.15444 50.15444 50.80782 51.14399 51.14399 51.14399 51.14399 52.19354 52.19354 51.83658 51.83658 51.83658 51.48682 51.48682 51.48682 51.83658 51.83658 51.48682 51.48682 51.48682 51.48682 51.48682 50.80782 50.80782 52.55803 51.48682 51.14399 50.80782 51.14399 51.48682 51.48682 51.48682 50.80782 50.80782 50.80782 48.91732 48.62138 48.33041 48.33041 48.33041 48.04425 48.91732 48.91732 48.91732 49.21841 49.21841 48.91732 48.62138 48.33041 48.33041 48.33041 49.83678 48.62138 48.62138 48.62138 48.62138 48.62138 48.91732 49.52484 49.52484 48.91732 48.62138 48.33041];0048 timeUnit=256/8000;0049 pitchTh=0.8;0050 minNoteDuration=0.1;0051 plotOpt=1;0052 note=feval(mfilename, pv, timeUnit, pitchTh, minNoteDuration, plotOpt);0053 fprintf(<span class="string">'Hit return to hear the pitch vector...'</span>); pause; fprintf(<span class="string">'\n'</span>);0054 pvPlay(pv, timeUnit);0055 fprintf(<span class="string">'Hit return to hear the segmented note...'</span>); pause; fprintf(<span class="string">'\n'</span>);0056 notePlay(note, 1);</pre></div><hr><address>Generated on Thu 30-Oct-2008 12:52:18 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/">m2html</a></strong> © 2003</address></body></html>⌨️ 快捷键说明
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