Table 2 Characteristics of the RTVE database. Number of word occurrences (#occ.), duration (dur.) in minutes (min), number of speakers (#spk.), and average MOS (Ave. MOS)

LN24H-20151125

dev2

21049

123.50

22

3.37

LN24H-20151201

dev2

19727

112.43

16

3.27

LN24H-20160112

dev2

18617

110.40

19

3.24

LN24H-20160121

dev2

18215

120.33

18

2.93

millennium-20170522

dev2

8330

56.50

9

3.61

millennium-20170529

dev2

8812

57.95

10

3.24

millennium-20170626

dev2

7976

55.68

14

3.55

millennium-20171009

dev2

9863

58.78

12

3.60

millennium-20171106

dev2

8498

59.57

16

3.40

millennium-20171204

dev2

9280

60.25

10

3.29

millennium-20171211

dev2

9502

59.70

12

2.95

millennium-20171218

dev2

9386

55.55

15

2.70

EC-20170513

test

3565

22.13

N/A

3.12

EC-20170520

test

3266

21.25

N/A

3.38

EC-20170527

test

2602

17.87

N/A

3.42

EC-20170603

test

3527

23.87

N/A

3.90

EC-20170610

test

3846

24.22

N/A

3.31

EC-20170617

test

3368

21.55

N/A

3.36

EC-20170624

test

3286

22.60

N/A

3.65

EC-20170701

test

2893

22.52

N/A

3.47

EC-20170708

test

3425

23.15

N/A

3.58

EC-20170715

test

3316

22.55

N/A

3.82

EC-20170722

test

3929

27.40

N/A

3.88

EC-20170729

test

4126

27.45

N/A

3.61

EC-20170909

test

3063

21.05

N/A

3.64

EC-20170916

test

3422

24.60

N/A

3.40

EC-20170923

test

3331

22.02

N/A

3.24

EC-20180113

test

2742

19.02

N/A

3.80

EC-20180120

test

3466

21.97

N/A

3.28

EC-20180127

test

3488

22.52

N/A

3.56

EC-20180203

test

3016

21.60

N/A

3.90

EC-20180210

test

3214

23.20

N/A

3.71

EC-20180217

test

3094

20.33

N/A

3.57

EC-20180224

test

3140

20.78

N/A

3.56

millennium-20170703

test

8714

55.78

N/A

1.10

millennium-20171030

test

8182

57.05

N/A

3.44

ALL

train

3729924

27729

N/A

3.04

ALL

dev1

545952

3742.88

N/A

2.90

ALL

dev2

149255

930.64

N/A

3.25

ALL

test

90021

605.48

N/A

3.32