# LibriSpeech

## Data

| Data Subset | Duration in Seconds |
| data/manifest.train |  0.83s ~ 29.735s |
| data/manifest.dev | 1.065 ~ 35.155s |  
| data/manifest.test-clean | 1.285s ~ 34.955s |

## Conformer

| Model | Params | Config | Augmentation| Test set | Decode method | Loss | WER |  
| --- | --- | --- | --- | --- | --- | --- | --- |
| conformer | 47.63 M | conf/conformer.yaml | spec_aug + shift | test-clean | attention | 6.35 | 0.030162 |  
| conformer | 47.63 M | conf/conformer.yaml | spec_aug + shift | test-clean | ctc_greedy_search | 6.35 | 0.037910 |  
| conformer | 47.63 M | conf/conformer.yaml | spec_aug + shift | test-clean | ctc_prefix_beam_search | 6.35 | 0.037761 |  
| conformer | 47.63 M | conf/conformer.yaml | spec_aug + shift | test-clean | attention_rescoring | 6.35 | 0.032115 |  


### Test w/o length filter

| Model | Params | Config | Augmentation| Test set | Decode method | Loss | WER |  
| --- | --- | --- | --- | --- | --- | --- | --- |
| conformer | 47.63 M | conf/conformer.yaml | spec_aug + shift | test-clean-all | attention | 6.35 | 0.057117 |  

## Chunk Conformer

| Model | Params | Config | Augmentation| Test set | Decode method | Chunk Size & Left Chunks | Loss | WER |  
| --- | --- | --- | --- | --- | --- | --- | --- | --- |  
| conformer | 47.63 M | conf/chunk_conformer.yaml | spec_aug + shift | test-clean | attention | 16, -1 | 7.01250648 | 0.069548 |  
| conformer | 47.63 M | conf/chunk_conformer.yaml | spec_aug + shift | test-clean | ctc_greedy_search | 16, -1 | 7.01250648 | 0.094753 |  
| conformer | 47.63 M | conf/chunk_conformer.yaml | spec_aug + shift | test-clean | ctc_prefix_beam_search | 16, -1 | 7.01250648 | - |  
| conformer | 47.63 M | conf/chunk_conformer.yaml | spec_aug + shift | test-clean | attention_rescoring | 16, -1 | 7.01250648 | - |  


## Transformer

| Model | Params | Config | Augmentation| Test set | Decode method | Loss | WER |  
| --- | --- | --- | --- | --- | --- | --- | --- |
| transformer | 32.52 M | conf/transformer.yaml | spec_aug + shift | test-clean | attention | 6.98 | 0.036 |  

### Test w/o length filter

| Model | Params | Config | Augmentation| Test set | Decode method | Loss | WER |  
| --- | --- | --- | --- | --- | --- | --- | --- |
| transformer | 32.52 M | conf/transformer.yaml | spec_aug + shift | test-clean-all | attention | 6.98 | 0.066500 |