diff Code/Descriptors/Matlab/Common/detect_Silence.m @ 0:ea0c737c6323

first commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Code/Descriptors/Matlab/Common/detect_Silence.m	Thu Jul 26 14:46:25 2012 +0100
@@ -0,0 +1,37 @@
+function [ silenceSegments ] = detect_Silence( currentSampleName, OVERWRITE );
+
+%returns an array containing the start and end frames for non-silent segments
+
+% open original silence calculation
+fileName = [ currentSampleName '_silence.txt'];
+% read pitch metrics from file
+fileID = fopen( fileName );
+
+if( (fileID <= 0) || (OVERWRITE) ) %does the file exist?
+    % no
+    disp('WARNING: MISSING SILENCE FILE');
+    %calculate it
+    [x, fs, frameLength, noOfFrames] = openFile(  [ sampleFileName '.wav' ] ); 
+    limits = calculate_Silence( x, fs, frameLength );
+    % create voicing metrics file
+    fileID = fopen( fileName, 'w');
+    fprintf( fileID, 'non-silent start frame \t non-silent end frame \n ');
+    rowNum = size(limits);
+    rowNum = rowNum(1);
+    if( rowNum == 0 )
+        % there are no silent frames
+        fprintf( fileID, '%d \t %d \n', 0, 0 );
+    end
+    for i=1:rowNum
+         fprintf( fileID, '%d \t %d \n', limits(i,1), limits(i,2) );
+    end
+    fclose( fileID );
+    fileID = fopen( fileName );
+ end
+% 
+% strip off header
+junk = fscanf( fileID, '%s', 6 );
+silence = fscanf( fileID, '%d', inf );
+silenceSegments = [silence(1:2:end) silence(2:2:end)];
+fclose( fileID );
+