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Automatic Mean Opinion Score (MOS) prediction is employed to evaluate the quality of synthetic speech. This study extends the application of predicted MOS to the task of Fake Audio Detection (FAD), as we expect that MOS can be used to…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-26 Wangjin Zhou , Zhengdong Yang , Chenhui Chu , Sheng Li , Raj Dabre , Yi Zhao , Tatsuya Kawahara

Traditional image quality assessment (IQA) methods rely on mean opinion scores (MOS), which are resource-intensive to collect and fail to provide interpretable, localized feedback on specific image distortions. We overcome these limitations…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Fadeel Sher Khan , Long N. Le , Abhinau K. Venkataramanan , Seok-Jun Lee , Hamid R. Sheikh

This paper introduces a novel objective function for quality mean opinion score (MOS) prediction of unseen speech synthesis systems. The proposed function measures the similarity of relative positions of predicted MOS values, in a…

Audio and Speech Processing · Electrical Eng. & Systems 2023-10-10 Hemant Yadav , Erica Cooper , Junichi Yamagishi , Sunayana Sitaram , Rajiv Ratn Shah

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

An effective approach to automatically predict the subjective rating for synthetic speech is to train on a listening test dataset with human-annotated scores. Although each speech sample in the dataset is rated by several listeners, most…

Sound · Computer Science 2021-10-19 Wen-Chin Huang , Erica Cooper , Junichi Yamagishi , Tomoki Toda

Existing objective evaluation metrics for voice conversion (VC) are not always correlated with human perception. Therefore, training VC models with such criteria may not effectively improve naturalness and similarity of converted speech. In…

Sound · Computer Science 2022-03-01 Chen-Chou Lo , Szu-Wei Fu , Wen-Chin Huang , Xin Wang , Junichi Yamagishi , Yu Tsao , Hsin-Min Wang

Non-intrusive speech quality assessment is a crucial operation in multimedia applications. The scarcity of annotated data and the lack of a reference signal represent some of the main challenges for designing efficient quality assessment…

Audio and Speech Processing · Electrical Eng. & Systems 2021-08-20 Alessandro Ragano , Emmanouil Benetos , Andrew Hines

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

A pooling mechanism is essential for mean opinion score (MOS) prediction, facilitating the transformation of variable-length audio features into a concise fixed-size representation that effectively encodes speech quality. Existing pooling…

Sound · Computer Science 2025-09-01 Cheng-Yeh Yang , Kuan-Tang Huang , Chien-Chun Wang , Hung-Shin Lee , Hsin-Min Wang , Berlin Chen

Recently, image quality has been generally describedby a mean opinion score (MOS). However, we observe that thequality scores of an image given by a group of subjects are verysubjective and diverse. Thus it is not enough to use a MOS…

Image and Video Processing · Electrical Eng. & Systems 2022-03-03 Yixuan Gao , Xiongkuo Min , Wenhan Zhu , Xiao-Ping Zhang , Guangtao Zhai

Diffusion models have found great success in generating high quality, natural samples of speech, but their potential for density estimation for speech has so far remained largely unexplored. In this work, we leverage an unconditional…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-16 Danilo de Oliveira , Julius Richter , Jean-Marie Lemercier , Simon Welker , Timo Gerkmann

Multichannel speech enhancement is widely used as a front-end in microphone array processing systems. While most existing approaches produce a single enhanced signal, direction-preserving multiple-input multiple-output (MIMO) methods…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-14 Thomas Deppisch

Research in modeling subjective metrics for quality assessment has led to the development of no-reference speech models that directly operate on utterance waveforms to predict the Mean Opinion Score (MOS). These models often rely on…

Audio and Speech Processing · Electrical Eng. & Systems 2025-05-29 Imran E Kibria , Donald S. Williamson

Although recent neural text-to-speech (TTS) systems have achieved high-quality speech synthesis, there are cases where a TTS system generates low-quality speech, mainly caused by limited training data or information loss during knowledge…

Audio and Speech Processing · Electrical Eng. & Systems 2022-05-26 Yeunju Choi , Youngmoon Jung , Youngjoo Suh , Hoirin Kim

Developers of text-to-speech synthesizers (TTS) often make use of human raters to assess the quality of synthesized speech. We demonstrate that we can model human raters' mean opinion scores (MOS) of synthesized speech using a deep…

Computation and Language · Computer Science 2016-11-29 Brian Patton , Yannis Agiomyrgiannakis , Michael Terry , Kevin Wilson , Rif A. Saurous , D. Sculley

This position paper argues that Mean Opinion Score (MOS), while historically foundational, is no longer sufficient as the sole supervisory signal for multimedia quality assessment models. MOS reduces rich, context-sensitive human judgments…

Computer Vision and Pattern Recognition · Computer Science 2025-05-27 Mohamed Amine Kerkouri , Marouane Tliba , Aladine Chetouani , Nour Aburaed , Alessandro Bruno

This paper investigates the use of Mean Opinion Score (MOS), a common image quality metric, as a user-centric evaluation metric for XAI post-hoc explainers. To measure the MOS, a user experiment is proposed, which has been conducted with…

Computer Vision and Pattern Recognition · Computer Science 2024-07-31 Hyeon Yu , Jenny Benois-Pineau , Romain Bourqui , Romain Giot , Alexey Zhukov

While deep learning has made impressive progress in speech synthesis and voice conversion, the assessment of the synthesized speech is still carried out by human participants. Several recent papers have proposed deep-learning-based…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-10 Yeunju Choi , Youngmoon Jung , Hoirin Kim

An ideal multimodal agent should be aware of the quality of its input modalities. Recent advances have enabled large language models (LLMs) to incorporate auditory systems for handling various speech-related tasks. However, most audio LLMs…

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