mlsanityData to 7 Oct 2026

VAD-free Streaming Hybrid CTC/Attention ASR for Unsegmented Recording

arXiv 2107.07509 ↗First posted 15 Jul 2021eess.AS cs.CL cs.SDcited by 1

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Abstract (arXiv)

In this work, we propose novel decoding algorithms to enable streaming automatic speech recognition (ASR) on unsegmented long-form recordings without voice activity detection (VAD), based on monotonic chunkwise attention (MoChA) with an auxiliary connectionist temporal classification (CTC) objective. We propose a block-synchronous beam search decoding to take advantage of efficient batched output-synchronous and low-latency input-synchronous searches. We also propose a VAD-free inference algorithm that leverages CTC probabilities to determine a suitable timing to reset the model states to tackle the vulnerability to long-form data. Experimental evaluations demonstrate that the block-synchronous decoding achieves comparable accuracy to the label-synchronous one. Moreover, the VAD-free inference can recognize long-form speech robustly for up to a few hours.

Key facts. Cited by 1 paper in the map (data through 7 Oct 2026). Builds on 27 of its 45 references that are in the map. First posted on arXiv 15 Jul 2021.

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27 of 45 references.

References · 27

  1. 2015Neural Machine Translation of Rare Words with Subword Unitscited by 2,898
  2. 2020Conformer: Convolution-augmented Transformer for Speech Recognitioncited by 1,838
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15 more
  1. 2020FastEmit: Low-latency Streaming ASR with Sequence-level Emission Regularizationcited by 66
  2. 2020On the Comparison of Popular End-to-End Models for Large Scale Speech Recognitioncited by 62
  3. 2020Towards Fast and Accurate Streaming End-to-End ASRcited by 47
  4. 2017Exploring Neural Transducers for End-to-End Speech Recognitioncited by 43
  5. 2019A comparison of end-to-end models for long-form speech recognitioncited by 42
  6. 2020Alignment Restricted Streaming Recurrent Neural Network Transducercited by 42
  7. 2019Self-Attention Aligner: A Latency-Control End-to-End Model for ASR Using Self-Attention Network and Chunk-Hoppingcited by 33
  8. 2020End-to-End Automatic Speech Recognition Integrated With CTC-Based Voice Activity Detectioncited by 20
  9. 2020Low Latency End-to-End Streaming Speech Recognition with a Scout Networkcited by 20
  10. 2020Minimum Latency Training Strategies for Streaming Sequence-to-Sequence ASRcited by 19
  11. 2015Highway Long Short-Term Memory RNNs for Distant Speech Recognitioncited by 17
  12. 2021Alignment Knowledge Distillation for Online Streaming Attention-based Speech Recognitioncited by 11
  13. 2020A Comparison of Label-Synchronous and Frame-Synchronous End-to-End Models for Speech Recognitioncited by 8
  14. 2020CTC-synchronous Training for Monotonic Attention Modelcited by 3
  15. 2021StableEmit: Selection Probability Discount for Reducing Emission Latency of Streaming Monotonic Attention ASRcited by 1

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