Versiune arhivată: August 2026Versiunea curentă (Octombrie 2026)Septembrie 2026

VITS Romanian TTS — Objective Evaluation

Synthesized vs. original speech for the SWARA multi-speaker base model and the CATA / TIBI emotion fine-tunes. Metrics computed with MCD (pymcd), pyin F0, STOI and PESQ.

How to read these: MCD (lower=better, ~4–8 dB typical) and F0 RMSE / F0 corr are DTW-aligned and are the reliable metrics for TTS. STOI and PESQ need sample-level time alignment, which synthesized speech does not have, so they sit near their floor — treat them as secondary / informational only.

SWARA Multispeaker — Reconstruction

Base multi-speaker VITS: synthesized speech vs the original recording for 8 speakers.

Summary

groupfileMCD_DTW dBF0_RMSE HzF0_CORRVUV_ERRSTOIPESQ_WBSI_SDR dB
dcsdcs_rnd3_4286.94443.740.2250.0870.2981.048-37.34
ddmddm_rnd1_4167.53720.630.6250.0750.0821.056-29.44
gnmgnm_rnd3_2288.65139.400.4110.1540.1071.060-30.40
htmhtm_rnd2_18910.26417.350.5240.1890.1521.062-28.23
ptlptl_rnd1_3528.51524.73-0.3400.3060.1501.034-41.24
sdssds_rnd1_2635.33210.53-0.0540.1880.2601.094-51.12
smmsmm_rnd2_4066.59534.620.4020.0670.1381.061-63.30
tsstss_rnd1_3817.42815.840.1500.1760.1841.031-29.56
MEAN7.65825.860.2430.1550.1711.056-38.83

Per-item details

dcs

dcs_rnd3_428
MCD6.944dB
F0 RMSE43.74Hz
F0 corr0.225
STOI0.298
PESQ1.048
Original
Synthesized
waveform mel-spectrogram f0 contour

ddm

ddm_rnd1_416
MCD7.537dB
F0 RMSE20.63Hz
F0 corr0.625
STOI0.082
PESQ1.056
Original
Synthesized
waveform mel-spectrogram f0 contour

gnm

gnm_rnd3_228
MCD8.651dB
F0 RMSE39.40Hz
F0 corr0.411
STOI0.107
PESQ1.060
Original
Synthesized
waveform mel-spectrogram f0 contour

htm

htm_rnd2_189
MCD10.264dB
F0 RMSE17.35Hz
F0 corr0.524
STOI0.152
PESQ1.062
Original
Synthesized
waveform mel-spectrogram f0 contour

ptl

ptl_rnd1_352
MCD8.515dB
F0 RMSE24.73Hz
F0 corr-0.340
STOI0.150
PESQ1.034
Original
Synthesized
waveform mel-spectrogram f0 contour

sds

sds_rnd1_263
MCD5.332dB
F0 RMSE10.53Hz
F0 corr-0.054
STOI0.260
PESQ1.094
Original
Synthesized
waveform mel-spectrogram f0 contour

smm

smm_rnd2_406
MCD6.595dB
F0 RMSE34.62Hz
F0 corr0.402
STOI0.138
PESQ1.061
Original
Synthesized
waveform mel-spectrogram f0 contour

tss

tss_rnd1_381
MCD7.428dB
F0 RMSE15.84Hz
F0 corr0.150
STOI0.184
PESQ1.031
Original
Synthesized
waveform mel-spectrogram f0 contour

Emotion Fine-tune — CATA (Catalina)

Single-speaker emotional model (emotion-as-speaker): synthesized vs original per emotion.

Summary

groupfileMCD_DTW dBF0_RMSE HzF0_CORRVUV_ERRSTOIPESQ_WBSI_SDR dB
fericitfericit-speaker-catalina-3355.87932.830.8160.1830.2391.106-32.68
furiosfurios-speaker-catalina-18.68830.480.7630.1880.1411.041-61.77
neutruneutru-speaker-catalina-3386.81642.080.7010.3520.0481.044-38.90
MEAN7.12835.130.7600.2410.1431.064-44.45

Per-item details

fericit

fericit-speaker-catalina-335
MCD5.879dB
F0 RMSE32.83Hz
F0 corr0.816
STOI0.239
PESQ1.106
Original
Synthesized
waveform mel-spectrogram f0 contour

furios

furios-speaker-catalina-1
MCD8.688dB
F0 RMSE30.48Hz
F0 corr0.763
STOI0.141
PESQ1.041
Original
Synthesized
waveform mel-spectrogram f0 contour

neutru

neutru-speaker-catalina-338
MCD6.816dB
F0 RMSE42.08Hz
F0 corr0.701
STOI0.048
PESQ1.044
Original
Synthesized
waveform mel-spectrogram f0 contour

Emotion Fine-tune — TIBI

Single-speaker emotional model (emotion-as-speaker): synthesized vs original per emotion.

Summary

groupfileMCD_DTW dBF0_RMSE HzF0_CORRVUV_ERRSTOIPESQ_WBSI_SDR dB
fericitfericit-speaker-tibi-3273.78418.330.1630.0910.1982.564-33.87
furiosfurios-speaker-tibi-14.4536.340.7320.1070.2131.615-43.34
neutruneutru-speaker-tibi-3293.3257.320.6480.0600.1573.281-32.66
MEAN3.85410.660.5140.0860.1892.487-36.62

Per-item details

fericit

fericit-speaker-tibi-327
MCD3.784dB
F0 RMSE18.33Hz
F0 corr0.163
STOI0.198
PESQ2.564
Original
Synthesized
waveform mel-spectrogram f0 contour

furios

furios-speaker-tibi-1
MCD4.453dB
F0 RMSE6.34Hz
F0 corr0.732
STOI0.213
PESQ1.615
Original
Synthesized
waveform mel-spectrogram f0 contour

neutru

neutru-speaker-tibi-329
MCD3.325dB
F0 RMSE7.32Hz
F0 corr0.648
STOI0.157
PESQ3.281
Original
Synthesized
waveform mel-spectrogram f0 contour