Différentes fonctions

MATLAB_CODE_SOURCE/diffBetweenSignals.m

@@ -0,0 +1,41 @@
+function [matches] = diffBetweenSignals(word,alphabet)
+
+delimitations = endpointdetection(word);
+lpcDico = cell(1,length(alphabet));
+
+for i=1:length(alphabet)
+    lpcDico{i} = lpc(cell2mat(alphabet(i)),50);
+end
+
+temp = 9999;
+slice = cell(1,length(delimitations));
+matches = zeros(1,length(delimitations));
+currentLetter = 0;
+
+for i=1:length(delimitations)
+    slice{i} = word(delimitations{i}(1):delimitations{i}(2));
+    lpcLetter = lpc(slice{i},50);
+    for j=1:length(alphabet)
+        tLpcLetter = lpcLetter;
+        tLpcDico = lpcDico{j};
+        if length(tLpcLetter) < length(tLpcDico)
+            tLpcLetter(length(tLpcDico)) = 0;
+        elseif length(tLpcLetter) > length(tLpcDico)
+            tLpcDico(length(tLpcLetter)) = 0;
+        end
+%         subplot(length(alphabet),1,j);
+%         plot([1:51],tLpcLetter,[1:51],tLpcDico);
+        diff = sqrt(sum((tLpcLetter-tLpcDico).^2));
+%         diff
+%         temp
+        if diff < temp
+            temp = diff;
+            currentLetter = j;
+        end
+    end
+%     return;
+    matches(i) = currentLetter;
+    currentLetter = 0;
+    temp = 9999;
+end
+end

MATLAB_CODE_SOURCE/displaySignals.m

@@ -0,0 +1,6 @@
+function displaySignals(signals)
+    for i=1:length(signals)
+        subplot(length(signals),1,i);
+        plot(cell2mat(signals(i)));
+    end
+end

MATLAB_CODE_SOURCE/endpointdetection.m

@@ -1,14 +1,41 @@
-function [startP, endP] = endpointdetection(inputSignal)
+function [points] = endpointdetection(inputSignal)
     P = inputSignal .^ 2;
     noiseValue = sum(P)/length(P);
+    plot(P)
+    line([0,length(inputSignal)],[noiseValue,noiseValue]);
+
+    points = {};
+    increment = 1;
+
     startDetected = 0;
+    startP = 0;
+    endP = 0;
+    remember = 0;
+    endCounter = 0;
     for i=1:length(P)
         if P(i) > noiseValue && startDetected == 0
             startP = i;
             startDetected = 1;
         elseif P(i) < noiseValue && startDetected == 1
-            endP = i;
-            return;
+            if endP == 0
+                endP = i;
+                remember = i;
+            elseif endCounter < 800
+                endCounter = endCounter+1;
+            elseif endCounter >= 800
+                points{increment} = [startP, endP];
+                startP = 0;
+                endP = 0;
+                remember = 0;
+                endCounter = 0;
+                increment = increment + 1;
+                startDetected = 0;
+            end
+        elseif P(i) > noiseValue && startDetected == 1
+            endP = 0;
+            remember = 0;
+            i = remember;
+            endCounter = 0;
         end
     end
 end

MATLAB_CODE_SOURCE/record2data.m

@@ -0,0 +1,5 @@
+function [R] = record2data(duration)
+recordSignal = record(8000, duration);
+signal = getaudiodata(recordSignal);
+R = cell2mat(detectVoiced(signal, 8000));
+end