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Because of predicting all the target tokens in parallel, the non-autoregressive models greatly improve the decoding efficiency of speech recognition compared with traditional autoregressive models. In this work, we present dynamic alignment…

Sound · Computer Science 2023-03-15 Xulong Zhang , Haobin Tang , Jianzong Wang , Ning Cheng , Jian Luo , Jing Xiao

Training automatic speech recognition (ASR) systems requires large amounts of well-curated paired data. However, human annotators usually perform "non-verbatim" transcription, which can result in poorly trained models. In this paper, we…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-28 Dongji Gao , Hainan Xu , Desh Raj , Leibny Paola Garcia Perera , Daniel Povey , Sanjeev Khudanpur

In this study, we propose advancing all-neural speech recognition by directly incorporating attention modeling within the Connectionist Temporal Classification (CTC) framework. In particular, we derive new context vectors using time…

Computation and Language · Computer Science 2018-03-16 Amit Das , Jinyu Li , Rui Zhao , Yifan Gong

Multivariate Time-Series (MTS) clustering is crucial for signal processing and data analysis. Although deep learning approaches, particularly those leveraging Contrastive Learning (CL), are prominent for MTS representation, existing…

Machine Learning · Computer Science 2026-01-13 Zexi Tan , Tao Xie , Haoyi Xiao , Baoyao Yang , Yuzhu Ji , An Zeng , Xiang Zhang , Yiqun Zhang

The acoustic-to-word model based on the connectionist temporal classification (CTC) criterion was shown as a natural end-to-end (E2E) model directly targeting words as output units. However, the word-based CTC model suffers from the…

Computation and Language · Computer Science 2018-03-16 Jinyu Li , Guoli Ye , Amit Das , Rui Zhao , Yifan Gong

Accurate sequence-to-sequence (seq2seq) alignment is critical for applications like medical speech analysis and language learning tools relying on automatic speech recognition (ASR). State-of-the-art end-to-end (E2E) ASR systems, such as…

Machine Learning · Computer Science 2025-11-24 Yacouba Kaloga , Shashi Kumar , Petr Motlicek , Ina Kodrasi

Sequence-to-Sequence (seq2seq) tasks transcribe the input sequence to a target sequence. The Connectionist Temporal Classification (CTC) criterion is widely used in multiple seq2seq tasks. Besides predicting the target sequence, a side…

Computation and Language · Computer Science 2023-02-01 Jinchuan Tian , Brian Yan , Jianwei Yu , Chao Weng , Dong Yu , Shinji Watanabe

Connectionist temporal classification (CTC) -based models are attractive because of their fast inference in automatic speech recognition (ASR). Language model (LM) integration approaches such as shallow fusion and rescoring can improve the…

Computation and Language · Computer Science 2022-09-07 Hayato Futami , Hirofumi Inaguma , Masato Mimura , Shinsuke Sakai , Tatsuya Kawahara

Connectionist Temporal Classification (CTC) is a widely used criterion for training supervised sequence-to-sequence (seq2seq) models. It enables learning the relations between input and output sequences, termed alignments, by marginalizing…

Computation and Language · Computer Science 2024-03-08 Eliya Segev , Maya Alroy , Ronen Katsir , Noam Wies , Ayana Shenhav , Yael Ben-Oren , David Zar , Oren Tadmor , Jacob Bitterman , Amnon Shashua , Tal Rosenwein

We develop an algorithm which can learn from partially labeled and unsegmented sequential data. Most sequential loss functions, such as Connectionist Temporal Classification (CTC), break down when many labels are missing. We address this…

Machine Learning · Computer Science 2022-03-07 Vineel Pratap , Awni Hannun , Gabriel Synnaeve , Ronan Collobert

Segmental conditional random fields (SCRFs) and connectionist temporal classification (CTC) are two sequence labeling methods used for end-to-end training of speech recognition models. Both models define a transcription probability by…

Computation and Language · Computer Science 2017-06-07 Liang Lu , Lingpeng Kong , Chris Dyer , Noah A. Smith

Recently, prefix-tuning was proposed to efficiently adapt pre-trained language models to a broad spectrum of natural language classification tasks. It leverages soft prefix as task-specific indicators and language verbalizers as…

Computation and Language · Computer Science 2024-02-14 Yang Li , Canran Xu , Guodong Long , Tao Shen , Chongyang Tao , Jing Jiang

Noisy labels are inevitable, even in well-annotated datasets. The detection of noisy labels is of significant importance to enhance the robustness of speaker recognition models. In this paper, we propose a novel noisy label detection…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-21 Yao Shen , Yingying Gao , Yaqian Hao , Chenguang Hu , Fulin Zhang , Junlan Feng , Shilei Zhang

The task of Fine-grained Entity Type Classification (FETC) consists of assigning types from a hierarchy to entity mentions in text. Existing methods rely on distant supervision and are thus susceptible to noisy labels that can be…

Computation and Language · Computer Science 2018-04-17 Peng Xu , Denilson Barbosa

This research identifies a gap in weakly-labelled multivariate time-series classification (TSC), where state-of-the-art TSC models do not per-form well. Weakly labelled time-series are time-series containing noise and significant…

Machine Learning · Computer Science 2021-09-20 Surayez Rahman , Chang Wei Tan

In this work, we present a simple but effective method, CTCBERT, for advancing hidden-unit BERT (HuBERT). HuBERT applies a frame-level cross-entropy (CE) loss, which is similar to most acoustic model training. However, CTCBERT performs the…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-02 Ruchao Fan , Yiming Wang , Yashesh Gaur , Jinyu Li

Non-autoregressive translation (NAT) models are typically trained with the cross-entropy loss, which forces the model outputs to be aligned verbatim with the target sentence and will highly penalize small shifts in word positions. Latent…

Computation and Language · Computer Science 2022-10-11 Chenze Shao , Yang Feng

Connectionist Temporal Classification (CTC) based end-to-end speech recognition system usually need to incorporate an external language model by using WFST-based decoding in order to achieve promising results. This is more essential to…

Audio and Speech Processing · Electrical Eng. & Systems 2019-04-24 Shiliang Zhang , Ming Lei , Zhijie Yan

Recently, distant supervision has gained great success on Fine-grained Entity Typing (FET). Despite its efficiency in reducing manual labeling efforts, it also brings the challenge of dealing with false entity type labels, as distant…

Computation and Language · Computer Science 2019-04-16 Bo Chen , Xiaotao Gu , Yufeng Hu , Siliang Tang , Guoping Hu , Yueting Zhuang , Xiang Ren

This paper introduces a novel method to diagnose the source-target attention in state-of-the-art end-to-end speech recognition models with joint connectionist temporal classification (CTC) and attention training. Our method is based on the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-11-03 Nanxin Chen , Piotr Żelasko , Jesús Villalba , Najim Dehak