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Automatic methods to predict listener opinions of synthesized speech remain elusive since listeners, systems being evaluated, characteristics of the speech, and even the instructions given and the rating scale all vary from test to test.…

Audio and Speech Processing · Electrical Eng. & Systems 2022-02-15 Erica Cooper , Wen-Chin Huang , Tomoki Toda , Junichi Yamagishi

We present the second edition of the VoiceMOS Challenge, a scientific event that aims to promote the study of automatic prediction of the mean opinion score (MOS) of synthesized and processed speech. This year, we emphasize real-world and…

Audio and Speech Processing · Electrical Eng. & Systems 2023-10-10 Erica Cooper , Wen-Chin Huang , Yu Tsao , Hsin-Min Wang , Tomoki Toda , Junichi Yamagishi

Designing a speech quality assessment (SQA) system for estimating mean-opinion-score (MOS) of multi-rate speech with varying sampling frequency (16-48 kHz) is a challenging task. The challenge arises due to the limited availability of a…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-17 Fengyuan Cao , Xinyu Liang , Fredrik Cumlin , Victor Ungureanu , Chandan K. A. Reddy , Christian Schuldt , Saikat Chatterjee

Self-supervised learning enables the training of large neural models without the need for large, labeled datasets. It has been generating breakthroughs in several fields, including computer vision, natural language processing, biology, and…

Computation and Language · Computer Science 2023-12-19 Luis Lugo , Valentin Vielzeuf

With recent research advancements, deep learning models are becoming attractive and powerful choices for speech enhancement in real-time applications. While state-of-the-art models can achieve outstanding results in terms of speech quality…

Audio and Speech Processing · Electrical Eng. & Systems 2021-05-20 Sebastian Braun , Hannes Gamper , Chandan K. A. Reddy , Ivan Tashev

In this paper, we evaluate feature extraction models for predicting speech quality. We also propose a model architecture to compare embeddings of supervised learning and self-supervised learning models with embeddings of speaker…

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…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-30 Wenze Ren , Yi-Cheng Lin , Wen-Chin Huang , Ryandhimas E. Zezario , Szu-Wei Fu , Sung-Feng Huang , Erica Cooper , Haibin Wu , Hung-Yu Wei , Hsin-Min Wang , Hung-yi Lee , Yu Tsao

Speech evaluation measures a learners oral proficiency using automatic models. Corpora for training such models often pose sparsity challenges given that there often is limited scored data from teachers, in addition to the score…

Artificial Intelligence · Computer Science 2024-09-24 Huayun Zhang , Jeremy H. M. Wong , Geyu Lin , Nancy F. Chen

One objective of Speech Quality Assessment (SQA) is to estimate the ranks of synthetic speech systems. However, recent SQA models are typically trained using low-precision direct scores such as mean opinion scores (MOS) as the training…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-30 Cheng-Hung Hu , Yusuke Yasuda , Tomoki Toda

In online conferencing applications, estimating the perceived quality of an audio signal is crucial to ensure high quality of experience for the end user. The most reliable way to assess the quality of a speech signal is through human…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-24 Bastiaan Tamm , Rik Vandenberghe , Hugo Van hamme

The quantification of audio aesthetics remains a complex challenge in audio processing, primarily due to its subjective nature, which is influenced by human perception and cultural context. Traditional methods often depend on human…

Although supervised deep learning has revolutionized speech and audio processing, it has necessitated the building of specialist models for individual tasks and application scenarios. It is likewise difficult to apply this to dialects and…

Self-supervision methods learn representations by solving pretext tasks that do not require human-generated labels, alleviating the need for time-consuming annotations. These methods have been applied in computer vision, natural language…

Sound · Computer Science 2023-06-27 Giovana Morais , Matthew E. P. Davies , Marcelo Queiroz , Magdalena Fuentes

The majority of deep learning-based speech enhancement methods require paired clean-noisy speech data. Collecting such data at scale in real-world conditions is infeasible, which has led the community to rely on synthetically generated…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-30 Dominik Klement , Matthew Maciejewski , Sanjeev Khudanpur , Jan Černocký , Lukáš Burget

Automatic speech quality assessment has become increasingly important as modern speech generation systems continue to advance, while human listening tests remain costly, time-consuming, and difficult to scale. Most existing learning-based…

Assessing the perceptual quality of synthetic speech is crucial for guiding the development and refinement of speech generation models. However, it has traditionally relied on human subjective ratings such as the Mean Opinion Score (MOS),…

Self-supervised learning (SSL) has grown in interest within the speech processing community, since it produces representations that are useful for many downstream tasks. SSL uses global and contextual methods to produce robust…

Audio and Speech Processing · Electrical Eng. & Systems 2024-11-08 Subrina Sultana , Donald S. Williamson

In speech generation tasks, human subjective ratings, usually referred to as the opinion score, are considered the "gold standard" for speech quality evaluation, with the mean opinion score (MOS) serving as the primary evaluation metric.…

Sound · Computer Science 2024-06-21 Yuxun Tang , Jiatong Shi , Yuning Wu , Qin Jin

Recently proposed self-supervised learning approaches have been successful for pre-training speech representation models. The utility of these learned representations has been observed empirically, but not much has been studied about the…

Computation and Language · Computer Science 2022-12-06 Ankita Pasad , Ju-Chieh Chou , Karen Livescu

Automatic mean opinion score (MOS) prediction provides a more perceptual alternative to objective metrics, offering deeper insights into the evaluated models. With the rapid progress of multimodal large language models (MLLMs), their…

Sound · Computer Science 2025-09-23 Yuhang Jia , Xu Zhang , Yang Chen , Hui Wang , Enzhi Wang , Yong Qin