diff Code/Descriptors/Matlab/MPEG7/detect_HNR.m @ 4:92ca03a8fa99 tip

Update to ICASSP 2013 benchmark

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Code/Descriptors/Matlab/MPEG7/detect_HNR.m	Wed Feb 13 11:02:39 2013 +0000
@@ -0,0 +1,46 @@
+function [HNR] = detect_HNR( sampleWavFileName, OVERWRITE )
+
+sampleFileName = sampleWavFileName( 1 : length( sampleWavFileName ) - 4 );
+[x, fs, frameLength, noOfFrames] = openFile( sampleWavFileName );
+
+%---------------- GET THE SILENT FRAME VALUES -------------------
+
+% only wish to consider pitch values from voiced frames.
+% silent and unvoiced frames will produce pitch values that
+% are random and therefore will bias our results
+
+segmentFrames = detect_Silence( sampleWavFileName, 0 );
+[ silentFrames ] = getSilentDataArray( segmentFrames, noOfFrames );
+
+
+%---------------- GET THE PITCH VALUES --------------------------
+
+[ pitch ] = detect_pitch(  sampleWavFileName, 0 );
+
+% calculate the HNR
+
+% open original calculation
+fileName = [ sampleFileName '_HNR.txt'];
+% read pitch metrics from file
+fileID = fopen( fileName );
+
+if(( fileID <= 0 ) || ( OVERWRITE )) %does the file exist?
+    % no
+    disp('WARNING: MISSING HNR FILE');
+    %calculate it
+%     [x, fs, frameLength, noOfFrames] = openFile(  [ sampleFileName '.wav' ] );
+    y = buffer(x,frameLength);
+    harmonicToNoiseRatio = calculate_HNR( y, fs, noOfFrames, silentFrames, pitch );
+    
+    fileID = fopen( fileName, 'w');
+    for i = 1 : (noOfFrames-1) 
+        fprintf(fileID, '%d %s \n' , i, num2str( harmonicToNoiseRatio(i) ));
+    end
+    fclose( fileID );
+    fileID = fopen( fileName );
+end
+
+
+HNR = fscanf( fileID, '%f', inf );
+HNR = HNR(2:2:end);
+fclose(fileID);