DAM-Softmax loss is an improvement of AM-Softmax, it is proposed in paper: Dynamic Margin Softmax Loss for Speaker Verification.
This loss function is formulated as:
From this paper, we can find:
m = 0.2 ,λ = 2, s = 30
DAM-Softmax vs AM-Softmax
We can find the different performance between them in speaker verification task.
We should notice : in this paper, m = 0.2 and s = 30 in AM-Softmax