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why mwer use stop gradient? #2

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Mddct opened this issue Nov 15, 2021 · 3 comments
Open

why mwer use stop gradient? #2

Mddct opened this issue Nov 15, 2021 · 3 comments

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@Mddct
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Mddct commented Nov 15, 2021

why mwer use stop gradient? just a regularization?
@Mddct
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Mddct commented Nov 15, 2021

why mwer use stop gradient? just a regularization?

May be Variance reduction

@leixiaoning
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i find tf ctc beam search will loss the gradients

@TeaPoly
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TeaPoly commented Dec 9, 2022 •
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i find tf ctc beam search will loss the gradients

Beam search is just to find candidate paths, gradient is not required in beam search. Gradients are pushed back to logit weight since there are probability P which is computed from logit ​​as input to MWER loss. NBEST path from CTC Beam search can actually be generated offline to speed up training.

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@TeaPoly @Mddct @leixiaoning