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Training speech recognizers with unpaired speech and text -- known as unsupervised speech recognition (UASR) -- is a crucial step toward extending ASR to low-resource languages in the long-tail distribution and enabling multimodal learning…

Computation and Language · Computer Science 2025-10-07 Liming Wang , Junrui Ni , Kai-Wei Chang , Saurabhchand Bhati , David Harwath , Mark Hasegawa-Johnson , James R. Glass

Recent studies find existing self-supervised speech encoders contain primarily acoustic rather than semantic information. As a result, pipelined supervised automatic speech recognition (ASR) to large language model (LLM) systems achieve…

Discrete speech tokens have gained attention for their storage efficiency and integration with Large Language Models (LLMs). They are commonly categorized into acoustic and semantic tokens, with the latter being more advantageous for…

Audio and Speech Processing · Electrical Eng. & Systems 2025-12-04 Mohan Shi , Natarajan Balaji Shankar , Kaiyuan Zhang , Zilai Wang , Abeer Alwan

We present an unsupervised end-to-end training scheme where we discover discrete subword units from speech without using any labels. The discrete subword units are learned under an ASR-TTS autoencoder reconstruction setting, where an…

Computation and Language · Computer Science 2020-04-24 Andy T. Liu , Po-chun Hsu , Hung-yi Lee

Due to the subjective nature of current clinical evaluation, the need for automatic severity evaluation in dysarthric speech has emerged. DNN models outperform ML models but lack user-friendly explainability. ML models offer explainable…

Sound · Computer Science 2024-12-06 Yerin Choi , Jeehyun Lee , Myoung-Wan Koo

Despite the close relationship between speech perception and production, research in automatic speech recognition (ASR) and text-to-speech synthesis (TTS) has progressed more or less independently without exerting much mutual influence on…

Computation and Language · Computer Science 2017-07-18 Andros Tjandra , Sakriani Sakti , Satoshi Nakamura

How can we effectively develop speech technology for languages where no transcribed data is available? Many existing approaches use no annotated resources at all, yet it makes sense to leverage information from large annotated corpora in…

Computation and Language · Computer Science 2018-11-12 Enno Hermann , Sharon Goldwater

Sequence-to-sequence automatic speech recognition (ASR) models require large quantities of data to attain high performance. For this reason, there has been a recent surge in interest for unsupervised and semi-supervised training in such…

Audio and Speech Processing · Electrical Eng. & Systems 2019-08-21 Murali Karthick Baskar , Shinji Watanabe , Ramon Astudillo , Takaaki Hori , Lukáš Burget , Jan Černocký

Unsupervised word segmentation in audio utterances is challenging as, in speech, there is typically no gap between words. In a preliminary experiment, we show that recent deep self-supervised features are very effective for word…

Audio and Speech Processing · Electrical Eng. & Systems 2023-04-04 Tzeviya Sylvia Fuchs , Yedid Hoshen

This paper addresses the problem of automatic speech recognition (ASR) of a target speaker in background speech. The novelty of our approach is that we focus on a wakeup keyword, which is usually used for activating ASR systems like smart…

Audio and Speech Processing · Electrical Eng. & Systems 2018-11-08 Yusuke Kida , Dung Tran , Motoi Omachi , Toru Taniguchi , Yuya Fujita

While supervised quality predictors for synthesized speech have demonstrated strong correlations with human ratings, their requirement for in-domain labeled training data hinders their generalization ability to new domains. Unsupervised…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-08 Erica Cooper , Takuma Okamoto , Yamato Ohtani , Tomoki Toda , Hisashi Kawai

We present an unsupervised learning algorithm that acquires a natural-language lexicon from raw speech. The algorithm is based on the optimal encoding of symbol sequences in an MDL framework, and uses a hierarchical representation of…

cmp-lg · Computer Science 2008-02-03 Carl de Marcken

Speakers tend to engage in adaptive behavior, known as entrainment, when they become similar to their interlocutor in various aspects of speaking. We present an unsupervised deep learning framework that derives meaningful representation…

Computation and Language · Computer Science 2023-12-27 Jay Kejriwal , Stefan Benus , Lina M. Rojas-Barahona

In this work, we study the features extracted by English self-supervised learning (SSL) models in cross-lingual contexts and propose a new metric to predict the quality of feature representations. Using automatic speech recognition (ASR) as…

Computation and Language · Computer Science 2023-11-28 Shuyue Stella Li , Beining Xu , Xiangyu Zhang , Hexin Liu , Wenhan Chao , Leibny Paola Garcia

For our submission to the ZeroSpeech 2019 challenge, we apply discrete latent-variable neural networks to unlabelled speech and use the discovered units for speech synthesis. Unsupervised discrete subword modelling could be useful for…

Detecting medical conditions from speech acoustics is fundamentally a weakly-supervised learning problem: a single, often noisy, session-level label must be linked to nuanced patterns within a long, complex audio recording. This task is…

Sound · Computer Science 2026-04-21 Xingyuan Li , Mengyue Wu

Acoustic-to-Word recognition provides a straightforward solution to end-to-end speech recognition without needing external decoding, language model re-scoring or lexicon. While character-based models offer a natural solution to the…

Audio and Speech Processing · Electrical Eng. & Systems 2018-08-22 Shruti Palaskar , Florian Metze

Self-supervised learning (SSL) of speech has shown impressive results in speech-related tasks, particularly in automatic speech recognition (ASR). While most methods employ the output of intermediate layers of the SSL model as real-valued…

Sound · Computer Science 2023-05-30 Xuankai Chang , Brian Yan , Yuya Fujita , Takashi Maekaku , Shinji Watanabe

The performance of automatic speech recognition (ASR) systems can be significantly compromised by previously unseen conditions, which is typically due to a mismatch between training and testing distributions. In this paper, we address…

Computation and Language · Computer Science 2018-03-08 Wei-Ning Hsu , James Glass

Non-intrusive intelligibility prediction is important for its application in realistic scenarios, where a clean reference signal is difficult to access. The construction of many non-intrusive predictors require either ground truth…

Audio and Speech Processing · Electrical Eng. & Systems 2022-07-07 Zehai Tu , Ning Ma , Jon Barker