HighRateMOS: Sampling-Rate Aware Modeling for Speech Quality Assessment
2025 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU) , 1–4 , 2025
Abstract
Modern speech quality prediction models are trained on audio data resampled to a specific sampling rate. When faced with higher-rate audio at test time, these models can produce biased scores. We introduce HighRateMOS, the first non-intrusive mean opinion score (MOS) model that explicitly considers sampling rate. HighRateMOS ensembles three model variants that exploit the following information: (i) a learnable embedding of speech sampling rate, (ii) Wav2vec 2.0 self-supervised embeddings, (iii) multi-scale CNN spectral features, and (iv) MFCC features. In AudioMOS 2025 Track3, HighRateMOS ranked first in five out of eight metrics. Our experiments confirm that modeling the sampling rate directly leads to more robust and sampling-rate-agnostic speech quality predictions.
BibTeX
@inproceedings{ren2025highratemos,
title = {HighRateMOS: Sampling-Rate Aware Modeling for Speech Quality Assessment},
author = {Ren, Wenze and Lin, Yi-Cheng and Huang, Wen-Chin and Zezario, Ryandhimas E. and Fu, Szu-Wei and Huang, Sung-Feng and Cooper, Erica and Wu, Haibin and Wei, Hung-Yu and Wang, Hsin-Min and Lee, Hung-yi and Tsao, Yu},
booktitle = {2025 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU)},
year = {2025},
pages = {1--4},
doi = {10.1109/ASRU65441.2025.11434689},
}