-
Notifications
You must be signed in to change notification settings - Fork 3
/
pesqmod.c
1420 lines (1134 loc) · 50.5 KB
/
pesqmod.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*****************************************************************************
Perceptual Evaluation of Speech Quality (PESQ)
ITU-T Recommendations P.862, P.862.1, P.862.2.
Version 2.0 - October 2005.
****************************************
PESQ Intellectual Property Rights Notice
****************************************
DEFINITIONS:
------------
For the purposes of this Intellectual Property Rights Notice
the terms ‘Perceptual Evaluation of Speech Quality Algorithm’
and ‘PESQ Algorithm’ refer to the objective speech quality
measurement algorithm defined in ITU-T Recommendation P.862;
the term ‘PESQ Software’ refers to the C-code component of P.862.
These definitions also apply to those parts of ITU-T Recommendation
P.862.2 and its associated source code that are common with P.862.
NOTICE:
-------
All copyright, trade marks, trade names, patents, know-how and
all or any other intellectual rights subsisting in or used in
connection with including all algorithms, documents and manuals
relating to the PESQ Algorithm and or PESQ Software are and remain
the sole property in law, ownership, regulations, treaties and
patent rights of the Owners identified below. The user may not
dispute or question the ownership of the PESQ Algorithm and
or PESQ Software.
OWNERS ARE:
-----------
1. British Telecommunications plc (BT), all rights assigned
to Psytechnics Limited
2. Royal KPN NV, all rights assigned to OPTICOM GmbH
RESTRICTIONS:
-------------
The user cannot:
1. alter, duplicate, modify, adapt, or translate in whole or in
part any aspect of the PESQ Algorithm and or PESQ Software
2. sell, hire, loan, distribute, dispose or put to any commercial
use other than those permitted below in whole or in part any
aspect of the PESQ Algorithm and or PESQ Software
PERMITTED USE:
--------------
The user may:
1. Use the PESQ Software to:
i) understand the PESQ Algorithm; or
ii) evaluate the ability of the PESQ Algorithm to perform
its intended function of predicting the speech quality
of a system; or
iii) evaluate the computational complexity of the PESQ Algorithm,
with the limitation that none of said evaluations or its
results shall be used for external commercial use.
2. Use the PESQ Software to test if an implementation of the PESQ
Algorithm conforms to ITU-T Recommendation P.862.
3. With the prior written permission of both Psytechnics Limited
and OPTICOM GmbH, use the PESQ Software in accordance with the
above Restrictions to perform work that meets all of the following
criteria:
i) the work must contribute directly to the maintenance of an
existing ITU recommendation or the development of a new ITU
recommendation under an approved ITU Study Item; and
ii) the work and its results must be fully described in a
written contribution to the ITU that is presented at a formal
ITU meeting within one year of the start of the work; and
iii) neither the work nor its results shall be put to any
commercial use other than making said contribution to the ITU.
Said permission will be provided on a case-by-case basis.
ANY OTHER USE OR APPLICATION OF THE PESQ SOFTWARE AND/OR THE PESQ
ALGORITHM WILL REQUIRE A PESQ LICENCE AGREEMENT, WHICH MAY BE OBTAINED
FROM EITHER OPTICOM GMBH OR PSYTECHNICS LIMITED.
EACH COMPANY OFFERS OEM LICENSE AGREEMENTS, WHICH COMBINE OEM
IMPLEMENTATIONS OF THE PESQ ALGORITHM TOGETHER WITH A PESQ PATENT LICENSE
AGREEMENT. PESQ PATENT-ONLY LICENSE AGREEMENTS MAY BE OBTAINED FROM OPTICOM.
***********************************************************************
* OPTICOM GmbH * Psytechnics Limited *
* Naegelsbachstr. 38, * Fraser House, 23 Museum Street, *
* D- 91052 Erlangen, Germany * Ipswich IP1 1HN, England *
* Phone: +49 (0) 9131 53020 0 * Phone: +44 (0) 1473 261 800 *
* Fax: +49 (0) 9131 53020 20 * Fax: +44 (0) 1473 261 880 *
* E-mail: info@opticom.de, * E-mail: info@psytechnics.com, *
* www.opticom.de * www.psytechnics.com *
***********************************************************************
Further information is also available from www.pesq.org
*****************************************************************************/
#include <math.h>
#include <stdio.h>
#include "pesq.h"
#include "pesqpar.h"
#include "dsp.h"
#define CRITERIUM_FOR_SILENCE_OF_5_SAMPLES 500.
float Sl, Sp;
int Nb;
long InIIR_Nsos;
int *nr_of_hz_bands_per_bark_band;
double *centre_of_band_bark;
double *centre_of_band_hz;
double *width_of_band_bark;
double *width_of_band_hz;
double *pow_dens_correction_factor;
double *abs_thresh_power;
void input_filter(
SIGNAL_INFO * ref_info, SIGNAL_INFO * deg_info, float * ftmp )
{
DC_block( (*ref_info).data, (*ref_info).Nsamples );
DC_block( (*deg_info).data, (*deg_info).Nsamples );
apply_filters( (*ref_info).data, (*ref_info).Nsamples );
apply_filters( (*deg_info).data, (*deg_info).Nsamples );
}
void calc_VAD( SIGNAL_INFO * sinfo )
{
apply_VAD( sinfo, sinfo-> data, sinfo-> VAD, sinfo-> logVAD );
}
int id_searchwindows( SIGNAL_INFO * ref_info, SIGNAL_INFO * deg_info,
ERROR_INFO * err_info )
{
long Utt_num = 0;
long count, VAD_length;
long this_start;
int speech_flag = 0;
float VAD_value;
long del_deg_start;
long del_deg_end;
VAD_length = ref_info-> Nsamples / Downsample;
del_deg_start = MINUTTLENGTH - err_info-> Crude_DelayEst / Downsample;
del_deg_end =
((*deg_info).Nsamples - err_info-> Crude_DelayEst) / Downsample -
MINUTTLENGTH;
for (count = 0; count < VAD_length; count++)
{
VAD_value = ref_info-> VAD [count];
if( (VAD_value > 0.0f) && (speech_flag == 0) )
{
speech_flag = 1;
this_start = count;
err_info-> UttSearch_Start [Utt_num] = count - SEARCHBUFFER;
if( err_info-> UttSearch_Start [Utt_num] < 0 )
err_info-> UttSearch_Start [Utt_num] = 0;
}
if( ((VAD_value == 0.0f) || (count == (VAD_length-1))) &&
(speech_flag == 1) )
{
speech_flag = 0;
err_info-> UttSearch_End [Utt_num] = count + SEARCHBUFFER;
if( err_info-> UttSearch_End [Utt_num] > VAD_length - 1 )
err_info-> UttSearch_End [Utt_num] = VAD_length -1;
if( ((count - this_start) >= MINUTTLENGTH) &&
(this_start < del_deg_end) &&
(count > del_deg_start) )
Utt_num++;
}
}
err_info-> Nutterances = Utt_num;
return Utt_num;
}
void id_utterances( SIGNAL_INFO * ref_info, SIGNAL_INFO * deg_info,
ERROR_INFO * err_info )
{
long Utt_num = 0;
long Largest_uttsize = 0;
long count, VAD_length;
int speech_flag = 0;
float VAD_value;
long this_start;
long last_end;
long del_deg_start;
long del_deg_end;
VAD_length = ref_info-> Nsamples / Downsample;
del_deg_start = MINUTTLENGTH - err_info-> Crude_DelayEst / Downsample;
del_deg_end =
((*deg_info).Nsamples - err_info-> Crude_DelayEst) / Downsample -
MINUTTLENGTH;
for (count = 0; count < VAD_length ; count++)
{
VAD_value = ref_info-> VAD [count];
if( (VAD_value > 0.0f) && (speech_flag == 0) )
{
speech_flag = 1;
this_start = count;
err_info-> Utt_Start [Utt_num] = count;
}
if( ((VAD_value == 0.0f) || (count == (VAD_length-1))) &&
(speech_flag == 1) )
{
speech_flag = 0;
err_info-> Utt_End [Utt_num] = count;
if( ((count - this_start) >= MINUTTLENGTH) &&
(this_start < del_deg_end) &&
(count > del_deg_start) )
Utt_num++;
}
}
err_info-> Utt_Start [0] = SEARCHBUFFER;
err_info-> Utt_End [err_info-> Nutterances-1] = (VAD_length - SEARCHBUFFER);
for (Utt_num = 1; Utt_num < err_info-> Nutterances; Utt_num++ )
{
this_start = err_info-> Utt_Start [Utt_num];
last_end = err_info-> Utt_End [Utt_num - 1];
count = (this_start + last_end) / 2;
err_info-> Utt_Start [Utt_num] = count;
err_info-> Utt_End [Utt_num - 1] = count;
}
this_start = (err_info-> Utt_Start [0] * Downsample) + err_info-> Utt_Delay [0];
if( this_start < (SEARCHBUFFER * Downsample) )
{
count = SEARCHBUFFER +
(Downsample - 1 - err_info-> Utt_Delay [0]) / Downsample;
err_info-> Utt_Start [0] = count;
}
last_end = (err_info-> Utt_End [err_info-> Nutterances-1] * Downsample) +
err_info-> Utt_Delay [err_info-> Nutterances-1];
if( last_end > ((*deg_info).Nsamples - SEARCHBUFFER * Downsample) )
{
count = ( (*deg_info).Nsamples -
err_info-> Utt_Delay [err_info-> Nutterances-1] ) / Downsample -
SEARCHBUFFER;
err_info-> Utt_End [err_info-> Nutterances-1] = count;
}
for (Utt_num = 1; Utt_num < err_info-> Nutterances; Utt_num++ )
{
this_start =
(err_info-> Utt_Start [Utt_num] * Downsample) +
err_info-> Utt_Delay [Utt_num];
last_end =
(err_info-> Utt_End [Utt_num - 1] * Downsample) +
err_info-> Utt_Delay [Utt_num - 1];
if( this_start < last_end )
{
count = (this_start + last_end) / 2;
this_start =
(Downsample - 1 + count - err_info-> Utt_Delay [Utt_num]) / Downsample;
last_end =
(count - err_info-> Utt_Delay [Utt_num - 1]) / Downsample;
err_info-> Utt_Start [Utt_num] = this_start;
err_info-> Utt_End [Utt_num - 1] = last_end;
}
}
for (Utt_num = 0; Utt_num < err_info-> Nutterances; Utt_num++ )
if( (err_info-> Utt_End [Utt_num] - err_info-> Utt_Start [Utt_num])
> Largest_uttsize )
Largest_uttsize =
err_info-> Utt_End [Utt_num] - err_info-> Utt_Start [Utt_num];
err_info-> Largest_uttsize = Largest_uttsize;
}
void utterance_split( SIGNAL_INFO * ref_info, SIGNAL_INFO * deg_info,
ERROR_INFO * err_info, float * ftmp )
{
long Utt_id;
long Utt_DelayEst;
long Utt_Delay;
float Utt_DelayConf;
long Utt_Start;
long Utt_End;
long Utt_SpeechStart;
long Utt_SpeechEnd;
long Utt_Len;
long step;
long Best_ED1, Best_ED2;
long Best_D1, Best_D2;
float Best_DC1, Best_DC2;
long Best_BP;
long Largest_uttsize = 0;
Utt_id = 0;
while( (Utt_id < err_info-> Nutterances) &&
(err_info-> Nutterances < MAXNUTTERANCES) )
{
Utt_DelayEst = err_info-> Utt_DelayEst [Utt_id];
Utt_Delay = err_info-> Utt_Delay [Utt_id];
Utt_DelayConf = err_info-> Utt_DelayConf [Utt_id];
Utt_Start = err_info-> Utt_Start [Utt_id];
Utt_End = err_info-> Utt_End [Utt_id];
Utt_SpeechStart = Utt_Start;
while( (Utt_SpeechStart < Utt_End) && (ref_info-> VAD [Utt_SpeechStart] <= 0.0f) )
Utt_SpeechStart++;
Utt_SpeechEnd = Utt_End;
while( (Utt_SpeechEnd > Utt_Start) && (ref_info-> VAD [Utt_SpeechEnd] <= 0.0f) )
Utt_SpeechEnd--;
Utt_SpeechEnd++;
Utt_Len = Utt_SpeechEnd - Utt_SpeechStart;
if( Utt_Len >= 200 )
{
split_align( ref_info, deg_info, err_info, ftmp,
Utt_Start, Utt_SpeechStart, Utt_SpeechEnd, Utt_End,
Utt_DelayEst, Utt_DelayConf,
&Best_ED1, &Best_D1, &Best_DC1,
&Best_ED2, &Best_D2, &Best_DC2,
&Best_BP );
if( (Best_DC1 > Utt_DelayConf) && (Best_DC2 > Utt_DelayConf) )
{
for (step = err_info-> Nutterances-1; step > Utt_id; step-- )
{
err_info-> Utt_DelayEst [step +1] = err_info-> Utt_DelayEst [step];
err_info-> Utt_Delay [step +1] = err_info-> Utt_Delay [step];
err_info-> Utt_DelayConf [step +1] = err_info-> Utt_DelayConf [step];
err_info-> Utt_Start [step +1] = err_info-> Utt_Start [step];
err_info-> Utt_End [step +1] = err_info-> Utt_End [step];
err_info-> UttSearch_Start [step +1] = err_info-> Utt_Start [step];
err_info-> UttSearch_End [step +1] = err_info-> Utt_End [step];
}
err_info-> Nutterances++;
err_info-> Utt_DelayEst [Utt_id] = Best_ED1;
err_info-> Utt_Delay [Utt_id] = Best_D1;
err_info-> Utt_DelayConf [Utt_id] = Best_DC1;
err_info-> Utt_DelayEst [Utt_id +1] = Best_ED2;
err_info-> Utt_Delay [Utt_id +1] = Best_D2;
err_info-> Utt_DelayConf [Utt_id +1] = Best_DC2;
err_info-> UttSearch_Start [Utt_id +1] = err_info-> UttSearch_Start [Utt_id];
err_info-> UttSearch_End [Utt_id +1] = err_info-> UttSearch_End [Utt_id];
if( Best_D2 < Best_D1 )
{
err_info-> Utt_Start [Utt_id] = Utt_Start;
err_info-> Utt_End [Utt_id] = Best_BP;
err_info-> Utt_Start [Utt_id +1] = Best_BP;
err_info-> Utt_End [Utt_id +1] = Utt_End;
}
else
{
err_info-> Utt_Start [Utt_id] = Utt_Start;
err_info-> Utt_End [Utt_id] = Best_BP + (Best_D2 - Best_D1) / (2 * Downsample);
err_info-> Utt_Start [Utt_id +1] = Best_BP - (Best_D2 - Best_D1) / (2 * Downsample);
err_info-> Utt_End [Utt_id +1] = Utt_End;
}
if( (err_info-> Utt_Start [Utt_id] - SEARCHBUFFER) * Downsample + Best_D1 < 0 )
err_info-> Utt_Start [Utt_id] =
SEARCHBUFFER + (Downsample - 1 - Best_D1) / Downsample;
if( (err_info-> Utt_End [Utt_id +1] * Downsample + Best_D2) >
((*deg_info).Nsamples - SEARCHBUFFER * Downsample) )
err_info-> Utt_End [Utt_id +1] =
((*deg_info).Nsamples - Best_D2) / Downsample - SEARCHBUFFER;
}
else Utt_id++;
}
else Utt_id++;
}
for (Utt_id = 0; Utt_id < err_info-> Nutterances; Utt_id++ )
if( (err_info-> Utt_End [Utt_id] - err_info-> Utt_Start [Utt_id])
> Largest_uttsize )
Largest_uttsize =
err_info-> Utt_End [Utt_id] - err_info-> Utt_Start [Utt_id];
err_info-> Largest_uttsize = Largest_uttsize;
}
void utterance_locate( SIGNAL_INFO * ref_info, SIGNAL_INFO * deg_info,
ERROR_INFO * err_info, float * ftmp )
{
long Utt_id;
id_searchwindows( ref_info, deg_info, err_info );
for (Utt_id = 0; Utt_id < err_info-> Nutterances; Utt_id++)
{
crude_align( ref_info, deg_info, err_info, Utt_id, ftmp);
time_align(ref_info, deg_info, err_info, Utt_id, ftmp );
}
id_utterances( ref_info, deg_info, err_info );
utterance_split( ref_info, deg_info, err_info, ftmp );
}
void short_term_fft (int Nf, SIGNAL_INFO *info, float *window, long start_sample, float *hz_spectrum, float *fft_tmp) {
int n, k;
for (n = 0; n < Nf; n++ )
{
fft_tmp [n] = info-> data [start_sample + n] * window [n];
}
RealFFT(fft_tmp, Nf);
for (k = 0; k < Nf / 2; k++ )
{
hz_spectrum [k] = fft_tmp [k << 1] * fft_tmp [k << 1] + fft_tmp [1 + (k << 1)] * fft_tmp [1 + (k << 1)];
}
hz_spectrum [0] = 0;
}
void freq_warping (int number_of_hz_bands, float *hz_spectrum, int Nb, float *pitch_pow_dens, long frame) {
int hz_band = 0;
int bark_band;
double sum;
for (bark_band = 0; bark_band < Nb; bark_band++) {
int n = nr_of_hz_bands_per_bark_band [bark_band];
int i;
sum = 0;
for (i = 0; i < n; i++) {
sum += hz_spectrum [hz_band++];
}
sum *= pow_dens_correction_factor [bark_band];
sum *= Sp;
pitch_pow_dens [frame * Nb + bark_band] = (float) sum;
}
}
float total_audible (int frame, float *pitch_pow_dens, float factor) {
int band;
float h, threshold;
double result;
result = 0.;
for (band= 1; band< Nb; band++) {
h = pitch_pow_dens [frame * Nb + band];
threshold = (float) (factor * abs_thresh_power [band]);
if (h > threshold) {
result += h;
}
}
return (float) result;
}
void time_avg_audible_of (int number_of_frames, int *silent, float *pitch_pow_dens, float *avg_pitch_pow_dens, int total_number_of_frames)
{
int frame;
int band;
for (band = 0; band < Nb; band++) {
double result = 0;
for (frame = 0; frame < number_of_frames; frame++) {
if (!silent [frame]) {
float h = pitch_pow_dens [frame * Nb + band];
if (h > 100 * abs_thresh_power [band]) {
result += h;
}
}
}
avg_pitch_pow_dens [band] = (float) (result / total_number_of_frames);
}
}
void freq_resp_compensation (int number_of_frames, float *pitch_pow_dens_ref, float *avg_pitch_pow_dens_ref, float *avg_pitch_pow_dens_deg, float constant)
{
int band;
for (band = 0; band < Nb; band++) {
float x = (avg_pitch_pow_dens_deg [band] + constant) / (avg_pitch_pow_dens_ref [band] + constant);
int frame;
if (x > (float) 100.0) {x = (float) 100.0;}
if (x < (float) 0.01) {x = (float) 0.01;}
for (frame = 0; frame < number_of_frames; frame++) {
pitch_pow_dens_ref [frame * Nb + band] *= x;
}
}
}
#define ZWICKER_POWER 0.23
void intensity_warping_of (float *loudness_dens, int frame, float *pitch_pow_dens)
{
int band;
float h;
double modified_zwicker_power;
for (band = 0; band < Nb; band++) {
float threshold = (float) abs_thresh_power [band];
float input = pitch_pow_dens [frame * Nb + band];
if (centre_of_band_bark [band] < (float) 4) {
h = (float) 6 / ((float) centre_of_band_bark [band] + (float) 2);
} else {
h = (float) 1;
}
if (h > (float) 2) {h = (float) 2;}
h = (float) pow (h, (float) 0.15);
modified_zwicker_power = ZWICKER_POWER * h;
if (input > threshold) {
loudness_dens [band] = (float) (pow (threshold / 0.5, modified_zwicker_power)
* (pow (0.5 + 0.5 * input / threshold, modified_zwicker_power) - 1));
} else {
loudness_dens [band] = 0;
}
loudness_dens [band] *= (float) Sl;
}
}
float pseudo_Lp (int n, float *x, float p) {
double totalWeight = 0;
double result = 0;
int band;
for (band = 1; band < Nb; band++) {
float h = (float) fabs (x [band]);
float w = (float) width_of_band_bark [band];
float prod = h * w;
result += pow (prod, p);
totalWeight += w;
}
result /= totalWeight;
result = pow (result, 1/p);
result *= totalWeight;
return (float) result;
}
void multiply_with_asymmetry_factor (float *disturbance_dens,
int frame,
const float * const pitch_pow_dens_ref,
const float * const pitch_pow_dens_deg)
{
int i;
float ratio, h;
for (i = 0; i < Nb; i++) {
ratio = (pitch_pow_dens_deg [frame * Nb + i] + (float) 50)
/ (pitch_pow_dens_ref [frame * Nb + i] + (float) 50);
h = (float) pow (ratio, (float) 1.2);
if (h > (float) 12) {h = (float) 12;}
if (h < (float) 3) {h = (float) 0.0;}
disturbance_dens [i] *= h;
}
}
double pow_of (const float * const x, long start_sample, long stop_sample, long divisor) {
long i;
double power = 0;
if (start_sample < 0) {
exit (1);
}
if (start_sample > stop_sample) {
exit (1);
}
for (i = start_sample; i < stop_sample; i++) {
float h = x [i];
power += h * h;
}
power /= divisor;
return power;
}
int compute_delay (long start_sample,
long stop_sample,
long search_range,
float *time_series1,
float *time_series2,
float *max_correlation) {
double power1, power2, normalization;
long i;
float *x1, *x2, *y;
double h;
long n = stop_sample - start_sample;
long power_of_2 = nextpow2 (2 * n);
long best_delay;
power1 = pow_of (time_series1, start_sample, stop_sample, stop_sample - start_sample) * (double) n/(double) power_of_2;
power2 = pow_of (time_series2, start_sample, stop_sample, stop_sample - start_sample) * (double) n/(double) power_of_2;
normalization = sqrt (power1 * power2);
if ((power1 <= 1E-6) || (power2 <= 1E-6)) {
*max_correlation = 0;
return 0;
}
x1 = (float *) safe_malloc ((power_of_2 + 2) * sizeof (float));;
x2 = (float *) safe_malloc ((power_of_2 + 2) * sizeof (float));;
y = (float *) safe_malloc ((power_of_2 + 2) * sizeof (float));;
for (i = 0; i < power_of_2 + 2; i++) {
x1 [i] = 0.;
x2 [i] = 0.;
y [i] = 0.;
}
for (i = 0; i < n; i++) {
x1 [i] = (float) fabs (time_series1 [i + start_sample]);
x2 [i] = (float) fabs (time_series2 [i + start_sample]);
}
RealFFT (x1, power_of_2);
RealFFT (x2, power_of_2);
for (i = 0; i <= power_of_2 / 2; i++) {
x1 [2 * i] /= power_of_2;
x1 [2 * i + 1] /= power_of_2;
}
for (i = 0; i <= power_of_2 / 2; i++) {
y [2*i] = x1 [2*i] * x2 [2*i] + x1 [2*i + 1] * x2 [2*i + 1];
y [2*i + 1] = -x1 [2*i + 1] * x2 [2*i] + x1 [2*i] * x2 [2*i + 1];
}
RealIFFT (y, power_of_2);
best_delay = 0;
*max_correlation = 0;
for (i = -search_range; i <= -1; i++) {
h = (float) fabs (y [(i + power_of_2)]) / normalization;
if (fabs (h) > (double) *max_correlation) {
*max_correlation = (float) fabs (h);
best_delay= i;
}
}
for (i = 0; i < search_range; i++) {
h = (float) fabs (y [i]) / normalization;
if (fabs (h) > (double) *max_correlation) {
*max_correlation = (float) fabs (h);
best_delay= i;
}
}
safe_free (x1);
safe_free (x2);
safe_free (y);
return best_delay;
}
#define NUMBER_OF_PSQM_FRAMES_PER_SYLLABE 20
float Lpq_weight (int start_frame,
int stop_frame,
float power_syllable,
float power_time,
float *frame_disturbance,
float *time_weight) {
double result_time= 0;
double total_time_weight_time = 0;
int start_frame_of_syllable;
for (start_frame_of_syllable = start_frame;
start_frame_of_syllable <= stop_frame;
start_frame_of_syllable += NUMBER_OF_PSQM_FRAMES_PER_SYLLABE/2) {
double result_syllable = 0;
int count_syllable = 0;
int frame;
for (frame = start_frame_of_syllable;
frame < start_frame_of_syllable + NUMBER_OF_PSQM_FRAMES_PER_SYLLABE;
frame++) {
if (frame <= stop_frame) {
float h = frame_disturbance [frame];
result_syllable += pow (h, power_syllable);
}
count_syllable++;
}
result_syllable /= count_syllable;
result_syllable = pow (result_syllable, (double) 1/power_syllable);
result_time+= pow (time_weight [start_frame_of_syllable - start_frame] * result_syllable, power_time);
total_time_weight_time += pow (time_weight [start_frame_of_syllable - start_frame], power_time);
}
result_time /= total_time_weight_time;
result_time= pow (result_time, (float) 1 / power_time);
return (float) result_time;
}
void set_to_sine (SIGNAL_INFO *info, float amplitude, float omega) {
long i;
for (i = 0; i < info-> Nsamples; i++) {
info-> data [i] = amplitude * (float) sin (omega * i);
}
}
float maximum_of (float *x, long start, long stop) {
long i;
float result = -1E20f;
for (i = start; i < stop; i++) {
if (result < x [i]) {
result = x [i];
}
}
return result;
}
float integral_of (float *x, long frames_after_start) {
double result = 0;
int band;
for (band = 1; band < Nb; band++) {
result += x [frames_after_start * Nb + band] * width_of_band_bark [band];
}
return (float) result;
return (float) result;
}
#define DEBUG_FR 0
void pesq_psychoacoustic_model(SIGNAL_INFO * ref_info,
SIGNAL_INFO * deg_info,
ERROR_INFO * err_info,
float * ftmp)
{
long maxNsamples = max (ref_info-> Nsamples, deg_info-> Nsamples);
long Nf = Downsample * 8L;
long start_frame, stop_frame;
long samples_to_skip_at_start, samples_to_skip_at_end;
float sum_of_5_samples;
long n, i;
float power_ref, power_deg;
long frame;
float *fft_tmp;
float *hz_spectrum_ref, *hz_spectrum_deg;
float *pitch_pow_dens_ref, *pitch_pow_dens_deg;
float *loudness_dens_ref, *loudness_dens_deg;
float *avg_pitch_pow_dens_ref, *avg_pitch_pow_dens_deg;
float *deadzone;
float *disturbance_dens, *disturbance_dens_asym_add;
float total_audible_pow_ref, total_audible_pow_deg;
int *silent;
float oldScale, scale;
int *frame_was_skipped;
float *frame_disturbance;
float *frame_disturbance_asym_add;
float *total_power_ref;
int utt;
#ifdef CALIBRATE
int periodInSamples;
int numberOfPeriodsPerFrame;
float omega;
#endif
float peak;
#define MAX_NUMBER_OF_BAD_INTERVALS 1000
int *frame_is_bad;
int *smeared_frame_is_bad;
int start_frame_of_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int stop_frame_of_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int start_sample_of_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int stop_sample_of_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int number_of_samples_in_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int delay_in_samples_in_bad_interval [MAX_NUMBER_OF_BAD_INTERVALS];
int number_of_bad_intervals= 0;
int search_range_in_samples;
int bad_interval;
float *untweaked_deg = NULL;
float *tweaked_deg = NULL;
float *doubly_tweaked_deg = NULL;
int there_is_a_bad_frame = FALSE;
float *time_weight;
float d_indicator, a_indicator;
int nn;
float Whanning [Nfmax];
for (n = 0L; n < Nf; n++ ) {
Whanning [n] = (float)(0.5 * (1.0 - cos((TWOPI * n) / Nf)));
}
switch (Fs) {
case 8000:
Nb = 42;
Sl = (float) Sl_8k;
Sp = (float) Sp_8k;
nr_of_hz_bands_per_bark_band = nr_of_hz_bands_per_bark_band_8k;
centre_of_band_bark = centre_of_band_bark_8k;
centre_of_band_hz = centre_of_band_hz_8k;
width_of_band_bark = width_of_band_bark_8k;
width_of_band_hz = width_of_band_hz_8k;
pow_dens_correction_factor = pow_dens_correction_factor_8k;
abs_thresh_power = abs_thresh_power_8k;
break;
case 16000:
Nb = 49;
Sl = (float) Sl_16k;
Sp = (float) Sp_16k;
nr_of_hz_bands_per_bark_band = nr_of_hz_bands_per_bark_band_16k;
centre_of_band_bark = centre_of_band_bark_16k;
centre_of_band_hz = centre_of_band_hz_16k;
width_of_band_bark = width_of_band_bark_16k;
width_of_band_hz = width_of_band_hz_16k;
pow_dens_correction_factor = pow_dens_correction_factor_16k;
abs_thresh_power = abs_thresh_power_16k;
break;
default:
printf ("Invalid sample frequency!\n");
exit (1);
}
samples_to_skip_at_start = 0;
do {
sum_of_5_samples= (float) 0;
for (i = 0; i < 5; i++) {
sum_of_5_samples += (float) fabs (ref_info-> data [SEARCHBUFFER * Downsample + samples_to_skip_at_start + i]);
}
if (sum_of_5_samples< CRITERIUM_FOR_SILENCE_OF_5_SAMPLES) {
samples_to_skip_at_start++;
}
} while ((sum_of_5_samples< CRITERIUM_FOR_SILENCE_OF_5_SAMPLES)
&& (samples_to_skip_at_start < maxNsamples / 2));
samples_to_skip_at_end = 0;
do {
sum_of_5_samples= (float) 0;
for (i = 0; i < 5; i++) {
sum_of_5_samples += (float) fabs (ref_info-> data [maxNsamples - SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000) - 1 - samples_to_skip_at_end - i]);
}
if (sum_of_5_samples< CRITERIUM_FOR_SILENCE_OF_5_SAMPLES) {
samples_to_skip_at_end++;
}
} while ((sum_of_5_samples< CRITERIUM_FOR_SILENCE_OF_5_SAMPLES)
&& (samples_to_skip_at_end < maxNsamples / 2));
start_frame = samples_to_skip_at_start / (Nf /2);
stop_frame = (maxNsamples - 2 * SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000) - samples_to_skip_at_end) / (Nf /2) - 1;
power_ref = (float) pow_of (ref_info-> data,
SEARCHBUFFER * Downsample,
maxNsamples - SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000),
maxNsamples - 2 * SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000));
power_deg = (float) pow_of (deg_info-> data,
SEARCHBUFFER * Downsample,
maxNsamples - SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000),
maxNsamples - 2 * SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000));
fft_tmp = (float *) safe_malloc ((Nf + 2) * sizeof (float));
hz_spectrum_ref = (float *) safe_malloc ((Nf / 2) * sizeof (float));
hz_spectrum_deg = (float *) safe_malloc ((Nf / 2) * sizeof (float));
frame_is_bad = (int *) safe_malloc ((stop_frame + 1) * sizeof (int));
smeared_frame_is_bad=(int *) safe_malloc ((stop_frame + 1) * sizeof (int));
silent = (int *) safe_malloc ((stop_frame + 1) * sizeof (int));
pitch_pow_dens_ref = (float *) safe_malloc ((stop_frame + 1) * Nb * sizeof (float));
pitch_pow_dens_deg = (float *) safe_malloc ((stop_frame + 1) * Nb * sizeof (float));
frame_was_skipped = (int *) safe_malloc ((stop_frame + 1) * sizeof (int));
frame_disturbance = (float *) safe_malloc ((stop_frame + 1) * sizeof (float));
frame_disturbance_asym_add = (float *) safe_malloc ((stop_frame + 1) * sizeof (float));
avg_pitch_pow_dens_ref = (float *) safe_malloc (Nb * sizeof (float));
avg_pitch_pow_dens_deg = (float *) safe_malloc (Nb * sizeof (float));
loudness_dens_ref = (float *) safe_malloc (Nb * sizeof (float));
loudness_dens_deg = (float *) safe_malloc (Nb * sizeof (float));;
deadzone = (float *) safe_malloc (Nb * sizeof (float));;
disturbance_dens = (float *) safe_malloc (Nb * sizeof (float));
disturbance_dens_asym_add = (float *) safe_malloc (Nb * sizeof (float));
time_weight = (float *) safe_malloc ((stop_frame + 1) * sizeof (float));
total_power_ref = (float *) safe_malloc ((stop_frame + 1) * sizeof (float));
#ifdef CALIBRATE
periodInSamples = Fs / 1000;
numberOfPeriodsPerFrame = Nf / periodInSamples;
omega = (float) (TWOPI / periodInSamples);
peak;
set_to_sine (ref_info, (float) 29.54, (float) omega);
#endif
for (frame = 0; frame <= stop_frame; frame++) {
int start_sample_ref = SEARCHBUFFER * Downsample + frame * Nf / 2;
int start_sample_deg;
int delay;
short_term_fft (Nf, ref_info, Whanning, start_sample_ref, hz_spectrum_ref, fft_tmp);
if (err_info-> Nutterances < 1) {
printf ("Processing error!\n");
exit (1);
}
utt = err_info-> Nutterances - 1;
while ((utt >= 0) && (err_info-> Utt_Start [utt] * Downsample > start_sample_ref)) {
utt--;
}
if (utt >= 0) {
delay = err_info-> Utt_Delay [utt];
} else {
delay = err_info-> Utt_Delay [0];
}
start_sample_deg = start_sample_ref + delay;
if ((start_sample_deg > 0) && (start_sample_deg + Nf < maxNsamples + DATAPADDING_MSECS * (Fs / 1000))) {
short_term_fft (Nf, deg_info, Whanning, start_sample_deg, hz_spectrum_deg, fft_tmp);
} else {
for (i = 0; i < Nf / 2; i++) {
hz_spectrum_deg [i] = 0;
}
}
freq_warping (Nf / 2, hz_spectrum_ref, Nb, pitch_pow_dens_ref, frame);
peak = maximum_of (pitch_pow_dens_ref, 0, Nb);
freq_warping (Nf / 2, hz_spectrum_deg, Nb, pitch_pow_dens_deg, frame);
total_audible_pow_ref = total_audible (frame, pitch_pow_dens_ref, 1E2);
total_audible_pow_deg = total_audible (frame, pitch_pow_dens_deg, 1E2);
silent [frame] = (total_audible_pow_ref < 1E7);
}
time_avg_audible_of (stop_frame + 1, silent, pitch_pow_dens_ref, avg_pitch_pow_dens_ref, (maxNsamples - 2 * SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000)) / (Nf / 2) - 1);
time_avg_audible_of (stop_frame + 1, silent, pitch_pow_dens_deg, avg_pitch_pow_dens_deg, (maxNsamples - 2 * SEARCHBUFFER * Downsample + DATAPADDING_MSECS * (Fs / 1000)) / (Nf / 2) - 1);
#ifndef CALIBRATE
freq_resp_compensation (stop_frame + 1, pitch_pow_dens_ref, avg_pitch_pow_dens_ref, avg_pitch_pow_dens_deg, 1000);
#endif
oldScale = 1;
for (frame = 0; frame <= stop_frame; frame++) {
int band;
total_audible_pow_ref = total_audible (frame, pitch_pow_dens_ref, 1);
total_audible_pow_deg = total_audible (frame, pitch_pow_dens_deg, 1);
total_power_ref [frame] = total_audible_pow_ref;
scale = (total_audible_pow_ref + (float) 5E3) / (total_audible_pow_deg + (float) 5E3);
if (frame > 0) {
scale = (float) 0.2 * oldScale + (float) 0.8*scale;
}