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Performance Record

Conformer

  • Feature info: using fbank feature, with dither 1.0, with cmvn
  • Training info: lr 0.001, batch size 32, 24 gpus on V100, acc_grad 16, 26 epochs
  • Decoding info: ctc_weight 0.5, average_num 10
decoding_method Dev Test_Net Test_Meeting
ctc_greedy_search 8.88 10.29 15.96
attention 9.38 10.12 17.28
attention_rescoring 8.69 9.7 15.59

Conformer bidecoder

  • Feature info: using fbank feature, with dither 1.0, with cmvn
  • Training info: lr 0.001, batch size 32, 24 gpus on V100, acc_grad 16, 26 epochs
  • Decoding info: ctc_weight 0.5, average_num 10
decoding_method Dev Test_Net Test_Meeting
ctc_greedy_search 8.98 9.55 16.48
attention 9.42 10.57 18.05
attention_rescoring 8.85 9.25 16.18

U2++ conformer

  • Feature info: using fbank feature, with dither 1.0, with cmvn
  • Training info: lr 0.001, batch size 48, 8 gpus on A100, acc_grad 16, 50 epochs
  • Decoding info: ctc_weight 0.5, reverse_weight 0.3, average_num 10
Decoding mode - Chunk size Dev Test_Net Test_Meeting
ctc greedy search - full 8.85 9.78 17.77
ctc greedy search - 16 9.32 11.02 18.79
ctc prefix beam search - full 8.80 9.73 17.57
ctc prefix beam search - 16 9.25 10.96 18.62
attention rescoring - full 8.60 9.26 17.34
attention rescoring - 16 8.87 10.22 18.11