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Fix for rnnt_loss.py #1177

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Merged
pkufool merged 6 commits into from
Apr 26, 2023
Merged

Fix for rnnt_loss.py #1177

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0f0dc9b
Update rnnt_loss.py
yfyeung Apr 25, 2023
0f32dc0
Update rnnt_loss.py
yfyeung Apr 25, 2023
e812814
Fix for style check
yfyeung Apr 25, 2023
2bc6adb
Fix for style check
yfyeung Apr 25, 2023
cf189e8
Update rnnt_loss.py
yfyeung Apr 25, 2023
ff90249
Merge branch 'k2-fsa:master' into yfyeung-patch-1
yfyeung Apr 26, 2023
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20 changes: 8 additions & 12 deletions k2/python/k2/rnnt_loss.py
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Original file line number Diff line number Diff line change
Expand Up @@ -169,12 +169,10 @@ def get_rnnt_logprobs(

# px is the probs of the actual symbols..
px_am = torch.gather(
am.unsqueeze(1).expand(B, S, T, C),
dim=3,
index=symbols.reshape(B, S, 1, 1).expand(B, S, T, 1),
).squeeze(
-1
) # [B][S][T]
am.transpose(1, 2), # (B, C, T)
dim=1,
index=symbols.unsqueeze(2).expand(B, S, T),
) # (B, S, T)

if rnnt_type == "regular":
px_am = torch.cat(
Expand Down Expand Up @@ -1399,12 +1397,10 @@ def get_rnnt_logprobs_smoothed(

# px is the probs of the actual symbols (not yet normalized)..
px_am = torch.gather(
am.unsqueeze(1).expand(B, S, T, C),
dim=3,
index=symbols.reshape(B, S, 1, 1).expand(B, S, T, 1),
).squeeze(
-1
) # [B][S][T]
am.transpose(1, 2), # (B, C, T)
dim=1,
index=symbols.unsqueeze(2).expand(B, S, T),
) # (B, S, T)

if rnnt_type == "regular":
px_am = torch.cat(
Expand Down