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In this work, we propose a streaming AV-ASR system based on a hybrid connectionist temporal classification (CTC)/attention neural network architecture. The audio and the visual encoder neural networks are both based on the conformer…

Audio and Speech Processing · Electrical Eng. & Systems 2023-07-04 Pingchuan Ma , Niko Moritz , Stavros Petridis , Christian Fuegen , Maja Pantic

Automatic Speech Recognition (ASR) using multiple microphone arrays has achieved great success in the far-field robustness. Taking advantage of all the information that each array shares and contributes is crucial in this task. Motivated by…

Computation and Language · Computer Science 2019-02-20 Xiaofei Wang , Ruizhi Li , Sri Harish Mallid , Takaaki Hori , Shinji Watanabe , Hynek Hermansky

In this work, we propose a new automatic speech recognition (ASR) system based on feature learning and an end-to-end training procedure for air traffic control (ATC) systems. The proposed model integrates the feature learning block,…

Sound · Computer Science 2021-11-05 Peng Fan , Dongyue Guo , Yi Lin , Bo Yang , Jianwei Zhang

Automatic recognition systems for child speech are lagging behind those dedicated to adult speech in the race of performance. This phenomenon is due to the high acoustic and linguistic variability present in child speech caused by their…

Audio and Speech Processing · Electrical Eng. & Systems 2021-03-05 Lucile Gelin , Morgane Daniel , Julien Pinquier , Thomas Pellegrini

Attention-based end-to-end models such as Listen, Attend and Spell (LAS), simplify the whole pipeline of traditional automatic speech recognition (ASR) systems and become popular in the field of speech recognition. In previous work,…

Computation and Language · Computer Science 2019-04-26 Ruchao Fan , Pan Zhou , Wei Chen , Jia Jia , Gang Liu

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

End-to-end (E2E) automatic speech recognition (ASR) systems often have difficulty recognizing uncommon words, that appear infrequently in the training data. One promising method, to improve the recognition accuracy on such rare words, is to…

Computation and Language · Computer Science 2021-11-08 Feng-Ju Chang , Jing Liu , Martin Radfar , Athanasios Mouchtaris , Maurizio Omologo , Ariya Rastrow , Siegfried Kunzmann

In the present paper, an attempt is made to combine Mask-CTC and the triggered attention mechanism to construct a streaming end-to-end automatic speech recognition (ASR) system that provides high performance with low latency. The triggered…

Sound · Computer Science 2021-10-22 Huaibo Zhao , Yosuke Higuchi , Tetsuji Ogawa , Tetsunori Kobayashi

In this paper, we propose an open source, production first, and production ready speech recognition toolkit called WeNet in which a new two-pass approach is implemented to unify streaming and non-streaming end-to-end (E2E) speech…

Sound · Computer Science 2021-12-30 Zhuoyuan Yao , Di Wu , Xiong Wang , Binbin Zhang , Fan Yu , Chao Yang , Zhendong Peng , Xiaoyu Chen , Lei Xie , Xin Lei

Recently, end-to-end (E2E) models become a competitive alternative to the conventional hybrid automatic speech recognition (ASR) systems. However, they still suffer from speaker mismatch in training and testing condition. In this paper, we…

Computation and Language · Computer Science 2020-01-07 Zhiyun Fan , Jie Li , Shiyu Zhou , Bo Xu

Compared to hybrid automatic speech recognition (ASR) systems that use a modular architecture in which each component can be independently adapted to a new domain, recent end-to-end (E2E) ASR system are harder to customize due to their…

Computation and Language · Computer Science 2022-03-01 Samuel Thomas , Brian Kingsbury , George Saon , Hong-Kwang J. Kuo

Neural end-to-end (E2E) models have become a promising technique to realize practical automatic speech recognition (ASR) systems. When realizing such a system, one important issue is the segmentation of audio to deal with streaming input or…

Audio and Speech Processing · Electrical Eng. & Systems 2021-07-19 Yuya Fujita , Tianzi Wang , Shinji Watanabe , Motoi Omachi

Recent end-to-end Automatic Speech Recognition (ASR) systems demonstrated the ability to outperform conventional hybrid DNN/ HMM ASR. Aside from architectural improvements in those systems, those models grew in terms of depth, parameters…

Audio and Speech Processing · Electrical Eng. & Systems 2020-10-06 Ludwig Kürzinger , Dominik Winkelbauer , Lujun Li , Tobias Watzel , Gerhard Rigoll

Recently, end-to-end sequence-to-sequence models for speech recognition have gained significant interest in the research community. While previous architecture choices revolve around time-delay neural networks (TDNN) and long short-term…

Computation and Language · Computer Science 2019-05-06 Ngoc-Quan Pham , Thai-Son Nguyen , Jan Niehues , Markus Müller , Sebastian Stüker , Alexander Waibel

This paper presents an overview and evaluation of some of the end-to-end ASR models on long-form audios. We study three categories of Automatic Speech Recognition(ASR) models based on their core architecture: (1) convolutional, (2)…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-22 Nithin Rao Koluguri , Samuel Kriman , Georgy Zelenfroind , Somshubra Majumdar , Dima Rekesh , Vahid Noroozi , Jagadeesh Balam , Boris Ginsburg

In this paper,an Enhanced Self-Attention (ESA) mechanism has been put forward for robust feature extraction.The proposed ESA is integrated with the recursive gated convolution and self-attention mechanism.In particular, the former is used…

Sound · Computer Science 2023-05-23 J. Li , Z. Duan , S. Li , X. Yu , G. Yang

The attention-based end-to-end (E2E) automatic speech recognition (ASR) architecture allows for joint optimization of acoustic and language models within a single network. However, in a vanilla E2E ASR architecture, the decoder sub-network…

Computation and Language · Computer Science 2019-12-03 Van Tung Pham , Haihua Xu , Yerbolat Khassanov , Zhiping Zeng , Eng Siong Chng , Chongjia Ni , Bin Ma , Haizhou Li

In this paper, we present an end-to-end automatic speech recognition system, which successfully employs subword units in a hybrid CTC-Attention based system. The subword units are obtained by the byte-pair encoding (BPE) compression…

Audio and Speech Processing · Electrical Eng. & Systems 2018-09-07 Zhangyu Xiao , Zhijian Ou , Wei Chu , Hui Lin

Recently, attention-based encoder-decoder (AED) models have shown high performance for end-to-end automatic speech recognition (ASR) across several tasks. Addressing overconfidence in such models, in this paper we introduce the concept of…

Audio and Speech Processing · Electrical Eng. & Systems 2021-12-16 Timo Lohrenz , Patrick Schwarz , Zhengyang Li , Tim Fingscheidt

There is often a trade-off between performance and latency in streaming automatic speech recognition (ASR). Traditional methods such as look-ahead and chunk-based methods, usually require information from future frames to advance…

Audio and Speech Processing · Electrical Eng. & Systems 2022-07-07 Zehan Li , Haoran Miao , Keqi Deng , Gaofeng Cheng , Sanli Tian , Ta Li , Yonghong Yan