Multistream CNN for Robust Acoustic Modeling

Overview

Multistream Convolutional Neural Network (CNN)

A multistream CNN is a novel neural network architecture for robust acoustic modeling in speech recognition tasks. It processes input speech with diverse resolutions by applying different dilation rates to convolutional neural networks across multiple streams to achieve the robustness. The dilation rate of 3 are selected from the multiples of a sub-sampling rate of 3 frames. Each stream stacks TDNN-F layers (a variant of 1D CNN), and output embedding vectors from the streams are concatenated then projected to the final layer, as illustrated below:

Alt text

References

Multistream CNN for Robust Acoustic Modeling [paper]

{
  @inproceedings{han2021multistream-cnn,
    title={Multistream CNN for Robust Acoustic Modeling},
    author={Kyu J. Han and Jing Pan and Venkata Krishna Naveen Tadala and Tao Ma and Dan Povey},
    booktitle={IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
    year={2021}
}

ASAPP-ASR: Multistream CNN and Self-Attentive SRU for SOTA Speech Recognition [paper]

{
  @inproceedings{pan2020asapp-asr,
    title={ASAPP-ASR: Multistream CNN and Self-Attentive SRU for SOTA Speech Recognition},
    author={Jing Pan and Joshua Shapiro and Jeremy Wohlwend and Kyu J. Han and Tao Lei and Tao Ma},
    booktitle={Interspeech},
    year={2020}
}

Installation

Please follow the original Kaldi build sequence, as below.

>> cd tools; make; cd ../src; ./configure; make clean; make -j clean depend; make -j all

Recipes and Results

LibriSpeech

>> egs/librispeech/s5/local/chain/run_multistream_cnn_1a.sh
dev-clean dev-other test-clean test-other
tdnn_1d 3.29 8.71 3.80 8.76
multistream_cnn_1a 3.20 7.68 3.54 7.87

Fisher-SWBD

>> egs/fisher_swbd/s5/local/chain/run_multistream_cnn_1a.sh
eval2000 swbd callhm
tdnn_7d 12.6 8.8 16.3
multistream_cnn_1a 12.6 9.2 15.7
Owner
ASAPP Research
AI for Enterprise
ASAPP Research
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