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Mapping two modalities, speech and text, into a shared representation space, is a research topic of using text-only data to improve end-to-end automatic speech recognition (ASR) performance in new domains. However, the length of speech…

Sound · Computer Science 2023-10-10 Jiaxu Zhu , Weinan Tong , Yaoxun Xu , Changhe Song , Zhiyong Wu , Zhao You , Dan Su , Dong Yu , Helen Meng

Unified Speech Recognition (USR) has emerged as a semi-supervised framework for training a single model for audio, visual, and audiovisual speech recognition, achieving state-of-the-art results on in-distribution benchmarks. However, its…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Alexandros Haliassos , Rodrigo Mira , Stavros Petridis

The awareness for biased ASR datasets or models has increased notably in recent years. Even for English, despite a vast amount of available training data, systems perform worse for non-native speakers. In this work, we improve an…

Computation and Language · Computer Science 2023-03-03 Philipp Klumpp , Pooja Chitkara , Leda Sarı , Prashant Serai , Jilong Wu , Irina-Elena Veliche , Rongqing Huang , Qing He

The connectionist temporal classification (CTC) enables end-to-end sequence learning by maximizing the probability of correctly recognizing sequences during training. The outputs of a CTC-trained model tend to form a series of spikes…

Computer Vision and Pattern Recognition · Computer Science 2020-07-08 Hongzhu Li , Weiqiang Wang

Recent work on end-to-end automatic speech recognition (ASR) has shown that the connectionist temporal classification (CTC) loss can be used to convert acoustics to phone or character sequences. Such systems are used with a dictionary and…

Computation and Language · Computer Science 2017-03-23 Kartik Audhkhasi , Bhuvana Ramabhadran , George Saon , Michael Picheny , David Nahamoo

We propose two approaches for speaker adaptation in end-to-end (E2E) automatic speech recognition systems. One is Kullback-Leibler divergence (KLD) regularization and the other is multi-task learning (MTL). Both approaches aim to address…

Computation and Language · Computer Science 2019-01-07 Ke Li , Jinyu Li , Yong Zhao , Kshitiz Kumar , Yifan Gong

In this paper, we explore various approaches for semi supervised learning in an end to end automatic speech recognition (ASR) framework. The first step in our approach involves training a seed model on the limited amount of labelled data.…

Audio and Speech Processing · Electrical Eng. & Systems 2019-08-15 Subhadeep Dey , Petr Motlicek , Trung Bui , Franck Dernoncourt

Conformers have recently been proposed as a promising modelling approach for automatic speech recognition (ASR), outperforming recurrent neural network-based approaches and transformers. Nevertheless, in general, the performance of these…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-25 Carlos Carvalho , Alberto Abad

In this work, we present the first study addressing automatic speech recognition (ASR) for children in an online learning setting. This is particularly important for both child-centric applications and the privacy protection of minors,…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-07 Edem Ahadzi , Vishwanath Pratap Singh , Tomi Kinnunen , Ville Hautamaki

The two most popular loss functions for streaming end-to-end automatic speech recognition (ASR) are RNN-Transducer (RNN-T) and connectionist temporal classification (CTC). Between these two loss types we can classify the monotonic RNN-T…

Audio and Speech Processing · Electrical Eng. & Systems 2022-10-25 Niko Moritz , Frank Seide , Duc Le , Jay Mahadeokar , Christian Fuegen

With the increasing practicality of deep learning applications, practitioners are inevitably faced with datasets corrupted by noise from various sources such as measurement errors, mislabeling, and estimated surrogate inputs/outputs that…

Machine Learning · Computer Science 2023-08-30 Wendyam Eric Lionel Ilboudo , Taisuke Kobayashi , Takamitsu Matsubara

End-to-end speech recognition models trained using joint Connectionist Temporal Classification (CTC)-Attention loss have gained popularity recently. In these models, a non-autoregressive CTC decoder is often used at inference time due to…

Computation and Language · Computer Science 2022-11-15 Saket Dingliwal , Monica Sunkara , Sravan Bodapati , Srikanth Ronanki , Jeff Farris , Katrin Kirchhoff

Tool-Integrated Reasoning (TIR) has significantly enhanced the capabilities of Large Language Models (LLMs), yet current agents tend to exhibit cognitive offloading, redundantly invoking external tools even for simple tasks. In this paper,…

Computation and Language · Computer Science 2026-01-22 Zhaiyu Fang , Ruipeng Sun

Recent techniques such as retrieval-augmented generation or chain-of-thought reasoning have led to longer contexts and increased inference costs. Context compression techniques can reduce these costs, but the most effective approaches…

Computation and Language · Computer Science 2025-10-24 Hippolyte Pilchen , Edouard Grave , Patrick Pérez

Recently, the recurrent neural network transducer (RNN-T) architecture has become an emerging trend in end-to-end automatic speech recognition research due to its advantages of being capable for online streaming speech recognition. However,…

Computation and Language · Computer Science 2020-05-05 Hu Hu , Rui Zhao , Jinyu Li , Liang Lu , Yifan Gong

Automatic speech recognition (ASR) with an encoder equipped with self-attention, whether streaming or non-streaming, takes quadratic time in the length of the speech utterance. This slows down training and decoding, increase their cost, and…

Sound · Computer Science 2024-09-12 Titouan Parcollet , Rogier van Dalen , Shucong Zhang , Sourav Batthacharya

The acoustic-to-word model based on the Connectionist Temporal Classification (CTC) criterion is a natural end-to-end (E2E) system directly targeting word as output unit. Two issues exist in the system: first, the current output of the CTC…

Computation and Language · Computer Science 2019-09-06 Amit Das , Jinyu Li , Guoli Ye , Rui Zhao , Yifan Gong

Automatic speech recognition (ASR) has recently become an important challenge when using deep learning (DL). It requires large-scale training datasets and high computational and storage resources. Moreover, DL techniques and machine…

Sound · Computer Science 2023-08-01 Hamza Kheddar , Yassine Himeur , Somaya Al-Maadeed , Abbes Amira , Faycal Bensaali

Connectionist temporal classification (CTC) is a powerful approach for sequence-to-sequence learning, and has been popularly used in speech recognition. The central ideas of CTC include adding a label "blank" during training. With this…

Computation and Language · Computer Science 2017-11-17 Bo-Ru Lu , Frank Shyu , Yun-Nung Chen , Hung-Yi Lee , Lin-shan Lee

Integrating large language models (LLMs) into automatic speech recognition (ASR) has become a dominant paradigm. Although recent LLM-based ASR models have shown promising performance on public benchmarks, it remains challenging to balance…

Audio and Speech Processing · Electrical Eng. & Systems 2026-04-10 Yuan Xie , Jiaqi Song , Guang Qiu , Xianliang Wang , Ming Lei , Jie Gao , Jie Wu