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Guanbo Wang 2022-04-11 21:46:40 +00:00
parent f485b66d54
commit 22f011e5ab
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2
egs/gigaspeech/ASR/README.md
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@ -15,6 +15,6 @@ ln -sfv /path/to/GigaSpeech download/GigaSpeech
## Performance Record
| | Dev | Test |
|-----|-------|-------|
| WER | 11.93 | 11.86 |
| WER | 10.47 | 10.58 |
See [RESULTS](/egs/gigaspeech/ASR/RESULTS.md) for details.

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egs/gigaspeech/ASR/RESULTS.md
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@ -5,22 +5,23 @@
#### 2022-04-06
The best WER, as of 2022-04-06, for the gigaspeech is below
(using HLG decoding + n-gram LM rescoring + attention decoder rescoring):
Results using HLG decoding + n-gram LM rescoring + attention decoder rescoring:
| | Dev | Test |
|-----|-------|-------|
| WER | 11.93 | 11.86 |
| WER | 10.47 | 10.58 |
Scale values used in n-gram LM rescoring and attention rescoring for the best WERs are:
| ngram_lm_scale | attention_scale |
|----------------|-----------------|
| 0.3 | 1.5 |
| 0.5 | 1.3 |
To reproduce the above result, use the following commands for training:
```
cd egs/gigaspeech/ASR/conformer_ctc
cd egs/gigaspeech/ASR
./prepare.sh
export CUDA_VISIBLE_DEVICES="0,1,2,3,4,5,6,7"
./conformer_ctc/train.py \
@ -31,12 +32,12 @@ export CUDA_VISIBLE_DEVICES="0,1,2,3,4,5,6,7"
--lang-dir data/lang_bpe_500
```
and the following command for decoding
and the following command for decoding:
```
./conformer_ctc/decode.py \
--epoch 19 \
--avg 8 \
--epoch 18 \
--avg 6 \
--method attention-decoder \
--num-paths 1000 \
--exp-dir conformer_ctc/exp_500 \
@ -47,3 +48,29 @@ and the following command for decoding
The tensorboard log for training is available at
<https://tensorboard.dev/experiment/rz63cmJXSK2fV9GceJtZXQ/>
Results using HLG decoding + whole lattice rescoring:
| | Dev | Test |
|-----|-------|-------|
| WER | 10.51 | 10.62 |
Scale values used in n-gram LM rescoring and attention rescoring for the best WERs are:
| lm_scale |
|----------|
| 0.2 |
To reproduce the above result, use the training commands above, and the following command for decoding:
```
./conformer_ctc/decode.py \
--epoch 18 \
--avg 6 \
--method whole-lattice-rescoring \
--num-paths 1000 \
--exp-dir conformer_ctc/exp_500 \
--lang-dir data/lang_bpe_500 \
--max-duration 20 \
--num-workers 1
```
Note: the `whole-lattice-rescoring` method is about twice as fast as the `attention-decoder` method, with slightly worse WER.