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Confidence estimation of predictions from an End-to-End (E2E) Automatic Speech Recognition (ASR) model benefits ASR's downstream and upstream tasks. Class-probability-based confidence scores do not accurately represent the quality of…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-09 Nagarathna Ravi , Thishyan Raj T , Vipul Arora

Subword units are commonly used for end-to-end automatic speech recognition (ASR), while a fully acoustic-oriented subword modeling approach is somewhat missing. We propose an acoustic data-driven subword modeling (ADSM) approach that…

Computation and Language · Computer Science 2023-10-24 Wei Zhou , Mohammad Zeineldeen , Zuoyun Zheng , Ralf Schlüter , Hermann Ney

Automatic speech recognition (ASR) allows transcribing the communications between air traffic controllers (ATCOs) and aircraft pilots. The transcriptions are used later to extract ATC named entities, e.g., aircraft callsigns. One common…

Audio and Speech Processing · Electrical Eng. & Systems 2022-10-18 Juan Zuluaga-Gomez , Seyyed Saeed Sarfjoo , Amrutha Prasad , Iuliia Nigmatulina , Petr Motlicek , Karel Ondrej , Oliver Ohneiser , Hartmut Helmke

Speech summarization, which generates a text summary from speech, can be achieved by combining automatic speech recognition (ASR) and text summarization (TS). With this cascade approach, we can exploit state-of-the-art models and large…

Audio and Speech Processing · Electrical Eng. & Systems 2021-11-17 Takatomo Kano , Atsunori Ogawa , Marc Delcroix , Shinji Watanabe

For various speech-related tasks, confidence scores from a speech recogniser are a useful measure to assess the quality of transcriptions. In traditional hidden Markov model-based automatic speech recognition (ASR) systems, confidence…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-27 Qiujia Li , David Qiu , Yu Zhang , Bo Li , Yanzhang He , Philip C. Woodland , Liangliang Cao , Trevor Strohman

Recent advancements in supervised automatic speech recognition (ASR) have achieved remarkable performance, largely due to the growing availability of large transcribed speech corpora. However, most languages lack sufficient paired speech…

Computation and Language · Computer Science 2025-01-10 Junrui Ni , Liming Wang , Yang Zhang , Kaizhi Qian , Heting Gao , Mark Hasegawa-Johnson , Chang D. Yoo

Psychoacoustic studies have shown that locally-time reversed (LTR) speech, i.e., signal samples time-reversed within a short segment, can be accurately recognised by human listeners. This study addresses the question of how well a…

Audio and Speech Processing · Electrical Eng. & Systems 2021-10-12 Si-Ioi Ng , Tan Lee

With the rise of reasoning language models and test-time scaling methods as a paradigm for improving model performance, substantial computation is often required to generate multiple candidate sequences from the same prompt. This enables…

Machine Learning · Computer Science 2026-05-28 Daniel Scalena , Leonidas Zotos , Elisabetta Fersini , Malvina Nissim , Ahmet Üstün

Vision-language models (VLMs) encounter considerable challenges when adapting to domain shifts stemming from changes in data distribution. Test-time adaptation (TTA) has emerged as a promising approach to enhance VLM performance under such…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Chenyu Zhang , Kunlun Xu , Zichen Liu , Yuxin Peng , Jiahuan Zhou

It is important to transcribe and archive speech data of endangered languages for preserving heritages of verbal culture and automatic speech recognition (ASR) is a powerful tool to facilitate this process. However, since endangered…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-03 Kohei Matsuura , Masato Mimura , Shinsuke Sakai , Tatsuya Kawahara

In general, the performance of automatic speech recognition (ASR) systems is significantly degraded due to the mismatch between training and test environments. Recently, a deep-learning-based image-to-image translation technique to…

Audio and Speech Processing · Electrical Eng. & Systems 2019-04-15 Jong-Hyeon Park , Myungwoo Oh , Hyung-Min Park

In this work we evaluate the utility of synthetic data for training automatic speech recognition (ASR). We use the ASR training data to train a text-to-speech (TTS) system similar to FastSpeech-2. With this TTS we reproduce the original…

Computation and Language · Computer Science 2024-10-29 Benedikt Hilmes , Nick Rossenbach , and Ralf Schlüter

Recent advances in speech-aware language models have coupled strong acoustic encoders with large language models, enabling systems that move beyond transcription to produce richer outputs. Among these, word-level timestamp prediction is…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-28 Xulin Fan , Vishal Sunder , Samuel Thomas , Mark Hasegawa-Johnson , Brian Kingsbury , George Saon

We introduce a self-supervised speech pre-training method called TERA, which stands for Transformer Encoder Representations from Alteration. Recent approaches often learn by using a single auxiliary task like contrastive prediction,…

Audio and Speech Processing · Electrical Eng. & Systems 2021-08-05 Andy T. Liu , Shang-Wen Li , Hung-yi Lee

We consider the problem of recognizing speech utterances spoken to a device which is generating a known sound waveform; for example, recognizing queries issued to a digital assistant which is generating responses to previous user inputs.…

Audio and Speech Processing · Electrical Eng. & Systems 2021-06-03 Nathan Howard , Alex Park , Turaj Zakizadeh Shabestary , Alexander Gruenstein , Rohit Prabhavalkar

Automatic Speech Recognition (ASR) technology has made significant progress in recent years, providing accurate transcription across various domains. However, some challenges remain, especially in noisy environments and specialized jargon.…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-06 Aviv Shamsian , Aviv Navon , Neta Glazer , Gill Hetz , Joseph Keshet

Automatic Speech Recognition (ASR) models have achieved remarkable accuracy in general settings, yet their performance often degrades in domain-specific applications due to data mismatch and linguistic variability. This challenge is…

Automatic speech recognition (ASR) systems are of vital importance nowadays in commonplace tasks such as speech-to-text processing and language translation. This created the need for an ASR system that can operate in realistic crowded…

Audio and Speech Processing · Electrical Eng. & Systems 2020-12-29 Sherif Abdulatif , Karim Armanious , Karim Guirguis , Jayasankar T. Sajeev , Bin Yang

Speech emotion recognition (SER) has drawn increasing attention for its applications in human-machine interaction. However, existing SER methods ignore the information gap between the pre-training speech recognition task and the downstream…

Sound · Computer Science 2023-10-03 Dongyuan Li , Yusong Wang , Kotaro Funakoshi , Manabu Okumura

Mainstream Test-Time Adaptation (TTA) methods for adapting vision-language models, e.g., CLIP, typically rely on Shannon Entropy (SE) at test time to measure prediction uncertainty and inconsistency. However, since CLIP has a built-in bias…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Xiangyu Wu , Dongming Jiang , Feng Yu , Yueying Tian , Jiaqi Tang , Qing-Guo Chen , Yang Yang , Jianfeng Lu