Publications

Ph.D. Dissertation

• Improving the Accuracy and Inference Efficiency for Low-resource Automatic Speech Recognition
  

Arxiv Papers

• Improving Generalization of Transformer for Speech Recognition with Parallel Schedule Sampling and Relative Positional Embedding
  Pan Zhou, Ruchao Fan, Wei Chen, and Jia Jia
  in arXiv preprint arXiv:1911.00203.
  

• Acoustic-aware Non-autoregressive Spell Correction with Mask Sample Decoding
  Ruchao Fan, Guoli Ye, Yashesh Gaur, Jinyu Li

2024

• Benchmarking Children's ASR with Supervised and Self-supervised Speech Foundation Models
  Ruchao Fan, Natarajan Balaji Shankar, and Abeer Alwan
  in Interspeech 2024.
  

• SOA: Reducing Domain Mismatch in SSL Pipeline by Speech Only Adaptation for Low Resource ASR
  Natarajan Balaji Shankar, Ruchao Fan, and Abeer Alwan
  in ICASSP 2024 SASB Workshop.
  

• UniEnc-CASSNAT: An Encoder-only Non-autoregressive ASR for Speech SSL Models
  Ruchao Fan, Natarajan Balaji Shankar, and Abeer Alwan
  in IEEE Singal Processing Letters (SPL).
  

2023

• A CTC Alignment-based Non-autoregressive Transformer for End-to-end Automatic Speech Recognition
  Ruchao Fan, Wei Chu, Peng Chang, and Abeer Alwan
  in IEEE Transactions on Audio, Speech, and Language Processing (TASLP).
  

• CTCBERT: Advancing Hidden-unit BERT with CTC Objectives [Poster]
  Ruchao Fan, Yiming Wang, Yashesh Gaur, and Jinyu Li
  in ICASSP 2023, IEEE.
  

2022

• Towards Better Domain Adaptation for Self-Supervised Models: A Case Study of Child ASR [Poster]
  Ruchao Fan, Yunzheng Zhu, Jinhan Wang, and Abeer Alwan
  in Journal of Selected Topics in Signal Processing (JSTSP), IEEE.
  

• DRAFT: A Novel Framework to Reduce Domain Shifting in Self-supervised Learning and Its Application to Children's ASR [Poster]
  Ruchao Fan, and Abeer Alwan
  in Interspeech 2022.
  

• Towards Better Meta-Initialization with Task Augmentation for Kindergarten-aged Speech Recognition
  Yunzheng Zhu, Ruchao Fan, and Abeer Alwan
  in ICASSP 2022, IEEE.
  

• LPC Augment: An LPC-Based ASR Data Augmentation Algorithm for Low and Zero-Resource Children's Dialects
  Alexander Johnson, Ruchao Fan, Robin Morris, and Abeer Alwan
  in ICASSP 2022, IEEE.
  

2021

• Fundamental frequency feature warping for frequency normalization and data augmentation in child automatic speech recognition
  Gary Yeung, Ruchao Fan, and Abeer Alwan
  in Speech Communication 2021.
  

• An Improved Single Step Non-autoregressive Transformer for Automatic Speech Recognition [Poster]
  Ruchao Fan, Wei Chu, Peng Chang, Jing Xiao and Abeer Alwan
  in Interspeech 2021, pp. 3715-3719.
  

• Low Resource German ASR with Untranscribed Data Spoken by Non-native Children – INTERSPEECH 2021 Shared Task SPAPL System
  Jinhan Wang, Yunzheng Zhu, Ruchao Fan, Wei Chu and Abeer Alwan
  in Interspeech 2021, pp. 1279-1283.
  

• CASS-NAT: CTC Alignment-based Single Step Non-autoregressive Transformer for Speech Recognition [Slides], [Poster]
  Ruchao Fan, Wei Chu, Peng Chang, and Jing Xiao
  in ICASSP 2021, IEEE, pp. 5889–5893.
  

• Bi-APC: Bidirectional Autoregressive Predictive Coding for Unsupervised Pre-training and Its Application to Children's ASR [Slides], [Poster]
  Ruchao Fan, Amber Afshan, and Abeer Alwan
  in ICASSP 2021, IEEE, pp. 7023–7027.
  

• Fundamental Frequency Feature Normalization and Data Augmentation for Child Speech Recognition
  Gary Yeung, Ruchao Fan, and Abeer Alwan
  in ICASSP 2021, IEEE, pp. 6993-6997.
  

2020

• Exploring the Use of an Unsupervised Autoregressive Model as a Shared Encoder for Text-Dependent Speaker Verification
  Vijay Ravi, Ruchao Fan, Amber Afshan, Huanhua Lu, and Abeer Alwan
  in Proc. Interspeech 2020, 2020.
  

2019

• An Online Attention-based Model for Speech Recognition
  Ruchao Fan, Pan Zhou, Wei Chen, Jia Jia, and Gang Liu
  in Proc. Interspeech 2019, 2019, pp. 4390-4394.
  

2018

• CNN-based Audio Front End Processing on Speech Recognition [Code]
  Ruchao Fan and Gang Liu
  in 2018 International Conference on Audio, Language and Image Processing (ICALIP). IEEE, 2018, pp. 349–354.
  

2017

• Frequency Warping Based on Two Factor Weighted Fusion
  Gang Liu, Haobin Chen, and Ruchao Fan
  in 2017 4th International Conference on Systems and Informatics (ICSAI). IEEE, 2017, pp. 1082–1086.
  

• Multi-parameter Frequency Warping Based on LDA
  Gang Liu, Boce Chu, and Ruchao Fan
  in 2017 13th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD). IEEE, 2017, pp. 2710–2714.
  

• An Improved Locality Preserving Projection for Feature Transform in Speech Recognition.
  Gang Liu, Boce Chu, and Ruchao Fan
  in 2017 International Conference on Machine Learning and Cybernetics (ICMLC). IEEE, 2017, vol. 1, pp. 77–82.