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Human subjective evaluation is the gold standard to evaluate speech quality optimized for human perception. Perceptual objective metrics serve as a proxy for subjective scores. The conventional and widely used metrics require a reference…

Sound · Computer Science 2021-02-12 Chandan K A Reddy , Vishak Gopal , Ross Cutler

Visual speech recognition models traditionally consist of two stages, feature extraction and classification. Several deep learning approaches have been recently presented aiming to replace the feature extraction stage by automatically…

Computer Vision and Pattern Recognition · Computer Science 2019-07-10 Stavros Petridis , Yujiang Wang , Pingchuan Ma , Zuwei Li , Maja Pantic

This study proposes a multi-task pseudo-label learning (MPL)-based non-intrusive speech quality assessment model called MTQ-Net. MPL consists of two stages: obtaining pseudo-label scores from a pretrained model and performing multi-task…

Audio and Speech Processing · Electrical Eng. & Systems 2024-03-14 Ryandhimas E. Zezario , Bo-Ren Brian Bai , Chiou-Shann Fuh , Hsin-Min Wang , Yu Tsao

Non-intrusive speech quality assessment (SQA) systems suffer from limited training data and costly human annotations, hindering their generalization to real-time conferencing calls. In this work, we propose leveraging large language models…

Audio and Speech Processing · Electrical Eng. & Systems 2025-08-11 Fredrik Cumlin , Xinyu Liang , Anubhab Ghosh , Saikat Chatterjee

This paper explores a novel perspective to speech quality assessment by leveraging natural language descriptions, offering richer, more nuanced insights than traditional numerical scoring methods. Natural language feedback provides…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-17 Siyin Wang , Wenyi Yu , Xianzhao Chen , Xiaohai Tian , Jun Zhang , Lu Lu , Yu Tsao , Junichi Yamagishi , Yuxuan Wang , Chao Zhang

Confidence estimation, in which we estimate the reliability of each recognized token (e.g., word, sub-word, and character) in automatic speech recognition (ASR) hypotheses and detect incorrectly recognized tokens, is an important function…

Audio and Speech Processing · Electrical Eng. & Systems 2023-12-25 Atsunori Ogawa , Naohiro Tawara , Takatomo Kano , Marc Delcroix

Many applications of speech technology require more and more audio data. Automatic assessment of the quality of the collected recordings is important to ensure they meet the requirements of the related applications. However, effective and…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-19 Qiang Huang , Thomas Hain

So far, many of the deep learning approaches for voice conversion produce good quality speech by using a large amount of training data. This paper presents a Deep Bidirectional Long Short-Term Memory (DBLSTM) based voice conversion…

Audio and Speech Processing · Electrical Eng. & Systems 2018-09-27 Mingyang Zhang , Berrak Sisman , Sai Sirisha Rallabandi , Haizhou Li , Li Zhao

Speech enhancement employing deep neural networks (DNNs) for denoising are called deep noise suppression (DNS). During training, DNS methods are typically trained with mean squared error (MSE) type loss functions, which do not guarantee…

Audio and Speech Processing · Electrical Eng. & Systems 2021-11-09 Ziyi Xu , Maximilian Strake , Tim Fingscheidt

With the advances in speech communication systems such as online conferencing applications, we can seamlessly work with people regardless of where they are. However, during online meetings, speech quality can be significantly affected by…

In this paper, we propose long short term memory speech enhancement network (LSTMSE-Net), an audio-visual speech enhancement (AVSE) method. This innovative method leverages the complementary nature of visual and audio information to boost…

Recent advances in automatic quality estimation for machine translation have exclusively focused on written language, leaving the speech modality underexplored. In this work, we formulate the task of quality estimation for speech…

Computation and Language · Computer Science 2024-10-30 HyoJung Han , Kevin Duh , Marine Carpuat

Data-driven speech enhancement employing deep neural networks (DNNs) can provide state-of-the-art performance even in the presence of non-stationary noise. During the training process, most of the speech enhancement neural networks are…

Audio and Speech Processing · Electrical Eng. & Systems 2021-04-01 Ziyi Xu , Maximilian Strake , Tim Fingscheidt

Speech intelligibility and quality assessment models are essential tools for researchers to evaluate and improve speech processing models. However, only a few studies have investigated multi-task models for intelligibility and quality…

Sound · Computer Science 2022-07-04 Yu-Wen Chen , Yu Tsao

From hearing aids to augmented and virtual reality devices, binaural speech enhancement algorithms have been established as state-of-the-art techniques to improve speech intelligibility and listening comfort. In this paper, we present an…

Audio and Speech Processing · Electrical Eng. & Systems 2025-07-29 Vikas Tokala , Eric Grinstein , Mike Brookes , Simon Doclo , Jesper Jensen , Patrick A. Naylor

Non-intrusive assessment of speech quality and intelligibility is essential when clean reference signals are unavailable. In this work, we propose a multimodal framework that integrates audio features and visual cues to predict PESQ and…

Audio and Speech Processing · Electrical Eng. & Systems 2025-06-12 Shafique Ahmed , Ryandhimas E. Zezario , Nasir Saleem , Amir Hussain , Hsin-Min Wang , Yu Tsao

Ensuring that Text-to-Speech (TTS) systems deliver human-perceived quality at scale is a central challenge for modern speech technologies. Human subjective evaluation protocols such as Mean Opinion Score (MOS) and Side-by-Side (SBS)…

Computation and Language · Computer Science 2026-04-13 Ilya Trofimenko , David Kocharyan , Aleksandr Zaitsev , Pavel Repnikov , Mark Levin , Nikita Shevtsov

Recent multi-modal Large Language Models (LLMs) such as GPT-4o have demonstrated strong capabilities of direct speech interaction. However, the lack of specialized and comprehensive benchmarks for end-to-end speech LLM evaluation hinders…

Computation and Language · Computer Science 2025-09-29 Linhao Zhang , Jian Zhang , Bokai Lei , Chuhan Wu , Aiwei Liu , Wei Jia , Xiao Zhou

Attention-based sequence-to-sequence models have shown promising results in automatic speech recognition. Using these architectures, one-dimensional input and output sequences are related by an attention approach, thereby replacing more…

Computation and Language · Computer Science 2019-11-21 Parnia Bahar , Albert Zeyer , Ralf Schlüter , Hermann Ney

Estimating quality of transmitted speech is known to be a non-trivial task. While traditionally, test participants are asked to rate the quality of samples; nowadays, automated methods are available. These methods can be divided into: 1)…

Sound · Computer Science 2021-12-14 H. Tilkorn , G. Mittag , S. Möller