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Some configuration changes, trying to tune it so ctc_loss does not degrade from epoch 1..

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This commit is contained in:
Daniel Povey 2021-09-23 19:38:57 +08:00
parent 6fa0f16e0c
commit 6636c05f12
1 changed files with 5 additions and 5 deletions
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10
egs/librispeech/ASR/conformer_ctc_bn_2d/train.py
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@ -173,11 +173,11 @@ def get_params() -> AttributeDict:
"use_double_scores": True,
"accum_grad": 1,
"att_scale": 0.5,
"reverse_att_scale": 0.2,
"reverse_att_scale": 0.25,
"ctc_scale": 0.3,
"delay_scale": 0.1, # Scale on difference between current and
"delay_scale": 2.5, # Scale on difference between current and
# delayed version of positive_embed.
"delay_minibatches": 200,
"delay_minibatches": 300,
"attention_dim": 512,
"nhead": 8,
"num_trunk_encoder_layers": 12,
@ -460,7 +460,7 @@ def compute_loss(
delayed_model = get_delayed_model(model, params)
with torch.random.fork_rng(devices=[device], enabled=True):
(old_memory, _, _) = delayed_model(feature, supervisions)
(_, _, old_positive_embed, _, _) = delayed_model.sample_forward(old_memory)
(_, old_softmax, _, _, _) = delayed_model.sample_forward(old_memory)
with torch.set_grad_enabled(is_training):
@ -472,7 +472,7 @@ def compute_loss(
negative_embed_shifted) = mmodel.sample_forward(memory)
if params.cur_epoch > 0 and params.delay_scale > 0.0:
delay_loss = compute_distance(old_positive_embed, positive_embed)
delay_loss = compute_distance(old_softmax, softmax)
num_subsampled_frames = memory.shape[0] * memory.shape[1]