Started code for DSP final project

6th-Semester-Spring-2024/DSP/Labs/FinalProject/obj_evaluation/time_align.m

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+function time_align(ref_data, ref_Nsamples, ...
+    deg_data, deg_Nsamples, Utt_id)
+
+global Utt_DelayEst Utt_Delay Utt_DelayConf UttSearch_Start UttSearch_End 
+global Align_Nfft Downsample Window
+
+estdelay = Utt_DelayEst(Utt_id);
+
+H = zeros( 1, Align_Nfft);
+X1= zeros( 1, Align_Nfft);
+X2= zeros( 1, Align_Nfft);
+
+startr = (UttSearch_Start(Utt_id)- 1)* Downsample+ 1;
+startd = startr + estdelay;
+if ( startd < 0 )
+    startr = 1 -estdelay;
+    startd = 1;
+end
+
+while( ((startd + Align_Nfft) <= deg_Nsamples) && ...
+        ((startr + Align_Nfft) <= ((UttSearch_End(Utt_id)- 1) * Downsample)) )
+    X1= ref_data( startr: startr+ Align_Nfft- 1).* Window;    
+    X2= deg_data( startd: startd+ Align_Nfft- 1).* Window;  
+    
+    % find cross-correlation between X1 and X2
+    X1_fft= fft( X1, Align_Nfft );
+    X1_fft_conj= conj( X1_fft);
+    X2_fft= fft( X2, Align_Nfft );    
+    X1= ifft( X1_fft_conj.* X2_fft, Align_Nfft );        
+
+    X1= abs( X1);     
+    v_max = max( X1)* 0.99;
+    
+    X1_greater_vmax= find( X1 > v_max );
+    H( X1_greater_vmax )= H( X1_greater_vmax )+ v_max^ 0.125;
+    
+    startr = startr+ Align_Nfft/ 4;
+    startd = startd+ Align_Nfft/ 4;
+
+end
+
+X1= H;
+X2= 0;
+Hsum = sum( H);
+
+X2(1) = 1.0;
+kernel = Align_Nfft / 64;
+
+for count= 2: kernel
+    X2( count)= 1- (count- 1)/ kernel;
+    X2( Align_Nfft- count+ 2)= 1- (count- 1)/ kernel;
+end
+    
+X1_fft= fft( X1, Align_Nfft );
+X2_fft= fft( X2, Align_Nfft );
+
+X1= ifft( X1_fft.* X2_fft, Align_Nfft );
+
+if (Hsum> 0)
+    H= abs( X1)/ Hsum;
+else
+    H= 0;
+end
+
+[v_max, I_max] = max( H);
+if( I_max- 1 >= (Align_Nfft/2) )
+    I_max = I_max- Align_Nfft;
+end
+
+Utt_Delay(Utt_id) = estdelay + I_max- 1;
+Utt_DelayConf(Utt_id) = v_max; % confidence
+    
+
+    
+    
+