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Languages usually switch within a multilingual speech signal, especially in a bilingual society. This phenomenon is referred to as code-switching (CS), making automatic speech recognition (ASR) challenging under a multilingual scenario. We…

Audio and Speech Processing · Electrical Eng. & Systems 2023-10-02 Hexin Liu , Leibny Paola Garcia , Xiangyu Zhang , Andy W. H. Khong , Sanjeev Khudanpur

Deep learning approaches have been widely used in Automatic Speech Recognition (ASR) and they have achieved a significant accuracy improvement. Especially, Convolutional Neural Networks (CNNs) have been revisited in ASR recently. However,…

Computation and Language · Computer Science 2017-02-28 Yisen Wang , Xuejiao Deng , Songbai Pu , Zhiheng Huang

We propose gated language experts and curriculum training to enhance multilingual transformer transducer models without requiring language identification (LID) input from users during inference. Our method incorporates a gating mechanism…

Computation and Language · Computer Science 2023-07-11 Eric Sun , Jinyu Li , Yuxuan Hu , Yimeng Zhu , Long Zhou , Jian Xue , Peidong Wang , Linquan Liu , Shujie Liu , Edward Lin , Yifan Gong

Utilizing air-traffic control (ATC) data for downstream natural-language processing tasks requires preprocessing steps. Key steps are the transcription of the data via automatic speech recognition (ASR) and speaker diarization, respectively…

Computation and Language · Computer Science 2024-06-21 Alexander Blatt , Aravind Krishnan , Dietrich Klakow

While recent text-to-speech (TTS) systems have made remarkable strides toward human-level quality, the performance of cross-lingual TTS lags behind that of intra-lingual TTS. This gap is mainly rooted from the speaker-language entanglement…

Sound · Computer Science 2023-06-13 Ji-Hoon Kim , Hong-Sun Yang , Yoon-Cheol Ju , Il-Hwan Kim , Byeong-Yeol Kim

Prior works have investigated the use of articulatory features as complementary representations for automatic speech recognition (ASR), but their use was largely confined to shallow acoustic models. In this work, we revisit articulatory…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-13 Ahmed Adel Attia , Jing Liu , Carol Espy Wilson

In Automatic Speech Recognition (ASR) systems, a recurring obstacle is the generation of narrowly focused output distributions. This phenomenon emerges as a side effect of Connectionist Temporal Classification (CTC), a robust sequence…

Audio and Speech Processing · Electrical Eng. & Systems 2024-03-19 SooHwan Eom , Eunseop Yoon , Hee Suk Yoon , Chanwoo Kim , Mark Hasegawa-Johnson , Chang D. Yoo

Automatic speech recognition (ASR) tasks are resolved by end-to-end deep learning models, which benefits us by less preparation of raw data, and easier transformation between languages. We propose a novel end-to-end deep learning model…

Audio and Speech Processing · Electrical Eng. & Systems 2018-10-31 Xinpei Zhou , Jiwei Li , Xi Zhou

This report describes the submitted system to the In-Car Multi-Channel Automatic Speech Recognition (ICMC-ASR) challenge, which considers the ASR task with multi-speaker overlapping and Mandarin accent dynamics in the ICMC case. We…

Recent works in speech recognition rely either on connectionist temporal classification (CTC) or sequence-to-sequence models for character-level recognition. CTC assumes conditional independence of individual characters, whereas…

Computer Vision and Pattern Recognition · Computer Science 2018-10-02 Stavros Petridis , Themos Stafylakis , Pingchuan Ma , Georgios Tzimiropoulos , Maja Pantic

The network architecture of end-to-end (E2E) automatic speech recognition (ASR) can be classified into several models, including connectionist temporal classification (CTC), recurrent neural network transducer (RNN-T), attention mechanism,…

Sound · Computer Science 2023-05-31 Yui Sudo , Muhammad Shakeel , Brian Yan , Jiatong Shi , Shinji Watanabe

Recently, masked prediction pre-training has seen remarkable progress in self-supervised learning (SSL) for speech recognition. It usually requires a codebook obtained in an unsupervised way, making it less accurate and difficult to…

Computation and Language · Computer Science 2022-06-22 Chengyi Wang , Yiming Wang , Yu Wu , Sanyuan Chen , Jinyu Li , Shujie Liu , Furu Wei

Recently, connectionist temporal classification (CTC)-based end-to-end (E2E) automatic speech recognition (ASR) models have achieved impressive results, especially with the development of self-supervised learning. However, E2E ASR models…

Audio and Speech Processing · Electrical Eng. & Systems 2023-12-15 Keqi Deng , Philip C. Woodland

In Automatic Speech Recognition it is still challenging to learn useful intermediate representations when using high-level (or abstract) target units such as words. For that reason, character or phoneme based systems tend to outperform…

Computation and Language · Computer Science 2019-01-15 Ramon Sanabria , Florian Metze

We present a state-of-the-art end-to-end Automatic Speech Recognition (ASR) model. We learn to listen and write characters with a joint Connectionist Temporal Classification (CTC) and attention-based encoder-decoder network. The encoder is…

Computation and Language · Computer Science 2017-06-12 Takaaki Hori , Shinji Watanabe , Yu Zhang , William Chan

We propose a method for inferring the conditional independence graph (CIG) of a high-dimensional Gaussian vector time series (discrete-time process) from a finite-length observation. By contrast to existing approaches, we do not rely on a…

Machine Learning · Statistics 2015-10-28 Alexander Jung

We propose a new framework to improve automatic speech recognition (ASR) systems in resource-scarce environments using a generative adversarial network (GAN) operating on acoustic input features. The GAN is used to enhance the features of…

Sound · Computer Science 2022-10-07 Walter Heymans , Marelie H. Davel , Charl van Heerden

We present an approach to reduce the performance disparity between geographic regions without degrading performance on the overall user population for ASR. A popular approach is to fine-tune the model with data from regions where the ASR…

Audio and Speech Processing · Electrical Eng. & Systems 2024-02-09 Viet Anh Trinh , Pegah Ghahremani , Brian King , Jasha Droppo , Andreas Stolcke , Roland Maas

Recently, the acoustic-to-word model based on the Connectionist Temporal Classification (CTC) criterion was shown as a natural end-to-end model directly targeting words as output units. However, this type of word-based CTC model suffers…

Computation and Language · Computer Science 2017-11-29 Jinyu Li , Guoli Ye , Rui Zhao , Jasha Droppo , Yifan Gong

Performance degradation of an Automatic Speech Recognition (ASR) system is commonly observed when the test acoustic condition is different from training. Hence, it is essential to make ASR systems robust against various environmental…

Sound · Computer Science 2021-02-08 Ruizhi Li , Gregory Sell , Hynek Hermansky