Performance Record

U2++ Conformer Result

Feature info: using fbank feature, with cmvn, no speed perturb, dither
Training info: lr 0.001, batch size 32, 8 gpus, acc_grad 1, 240 epochs, dither 1.0
Decoding info: ctc_weight 0.1, reverse_weight 0.4, average_num 30
Git hash: 5a1342312668e7a5abb83aed1e53256819cebf95
Model link: http://mobvoi-speech-public.ufile.ucloud.cn/public/wenet/aishell2/20210618_u2pp_conformer_exp.tar.gz

Feature info: using fbank feature, with cmvn, no speed perturb
Training info: lr 0.002, batch size 22, 8 gpus, acc_grad 1, 240 epochs, dither 0.0
Decoding info: ctc_weight 0.1, reverse_weight 0.5, average_num 30
Git hash: 5a1342312668e7a5abb83aed1e53256819cebf95
Model link: http://mobvoi-speech-public.ufile.ucloud.cn/public/wenet/aishell2/20210621_u2pp_transformer_exp.tar.gz

Feature info: using fbank feature, with cmvn, no speed perturb.
Training info: lr 0.002, batch size 16, 8 gpus, acc_grad 1, 120 epochs, dither 1.0
Decoding info: ctc_weight 0.5, average_num 20
Git hash: 14d38085a8d966cf9e9577ffafc51d578dce954f
Model link: http://mobvoi-speech-public.ufile.ucloud.cn/public/wenet/aishell2/20210421_unified_conformer_exp.tar.gz

decoding mode/chunk size	full	16	8	4
attention decoder	6.23	6.42	6.58	7.20
ctc greedy search	6.98	7.75	8.21	9.91
ctc prefix beam search	7.02	7.76	8.21	9.93
attention rescoring	6.08	6.46	6.72	7.79
LM + attention rescoring	5.87	6.37	6.47	6.61

Feature info: using fbank feature, with cmvn, no speed perturb.
Training info: lr 0.002, batch size 22, 8 gpus, acc_grad 1, 180 epochs, dither 0.0
Decoding info: ctc_weight 0.5, average_num 30
Git hash: 14d38085a8d966cf9e9577ffafc51d578dce954f
Model link: http://mobvoi-speech-public.ufile.ucloud.cn/public/wenet/aishell2/20210421_unified_transformer_exp.tar.gz

decoding mode/chunk size	full	16	8	4
attention decoder	6.71	7.08	7.17	7.40
ctc greedy search	7.84	8.68	8.98	9.46
ctc prefix beam search	7.86	8.68	8.98	9.45
attention rescoring	6.71	7.31	7.51	7.85
LM + attention rescoring	6.35	7.02	7.24	7.52