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Why negative grad_input of LF_MMI loss? #10

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glynpu opened this issue Sep 29, 2019 · 1 comment
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Why negative grad_input of LF_MMI loss? #10

glynpu opened this issue Sep 29, 2019 · 1 comment

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@glynpu
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glynpu commented Sep 29, 2019

Hi,

Why does grad_input multiply -1 in LF_MMI loss Class?
grad_input *= -1.0
Code Reference:

Any explanation for this?
Thank you
@jzlianglu
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Because we want to maximize the MMI objective, instead of to minimize it.

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@glynpu @jzlianglu