Pass model parameters from the command line.

egs/librispeech/ASR/pruned_transducer_stateless4/decode.py

@@ -18,36 +18,36 @@
 """
 Usage:
 (1) greedy search
-./pruned_transducer_stateless2/decode.py \
+./pruned_transducer_stateless4/decode.py \
         --epoch 28 \
         --avg 15 \
-        --exp-dir ./pruned_transducer_stateless2/exp \
+        --exp-dir ./pruned_transducer_stateless4/exp \
         --max-duration 100 \
         --decoding-method greedy_search
 
 (2) beam search
-./pruned_transducer_stateless2/decode.py \
+./pruned_transducer_stateless4/decode.py \
         --epoch 28 \
         --avg 15 \
-        --exp-dir ./pruned_transducer_stateless2/exp \
+        --exp-dir ./pruned_transducer_stateless4/exp \
         --max-duration 100 \
         --decoding-method beam_search \
         --beam-size 4
 
 (3) modified beam search
-./pruned_transducer_stateless2/decode.py \
+./pruned_transducer_stateless4/decode.py \
         --epoch 28 \
         --avg 15 \
-        --exp-dir ./pruned_transducer_stateless2/exp \
+        --exp-dir ./pruned_transducer_stateless4/exp \
         --max-duration 100 \
         --decoding-method modified_beam_search \
         --beam-size 4
 
 (4) fast beam search
-./pruned_transducer_stateless2/decode.py \
+./pruned_transducer_stateless4/decode.py \
         --epoch 28 \
         --avg 15 \
-        --exp-dir ./pruned_transducer_stateless2/exp \
+        --exp-dir ./pruned_transducer_stateless4/exp \
         --max-duration 1500 \
         --decoding-method fast_beam_search \
         --beam 4 \
@@ -74,7 +74,7 @@ from beam_search import (
     greedy_search_batch,
     modified_beam_search,
 )
-from train import get_params, get_transducer_model
+from train import add_model_arguments, get_params, get_transducer_model
 
 from icefall.checkpoint import (
     average_checkpoints,
@@ -124,7 +124,7 @@ def get_parser():
     parser.add_argument(
         "--exp-dir",
         type=str,
-        default="pruned_transducer_stateless2/exp",
+        default="pruned_transducer_stateless4/exp",
         help="The experiment dir",
     )
 
@@ -197,6 +197,8 @@ def get_parser():
         Used only when --decoding_method is greedy_search""",
     )
 
+    add_model_arguments(parser)
+
     return parser
 
 

egs/librispeech/ASR/pruned_transducer_stateless4/test_model.py

@@ -26,7 +26,7 @@ To run this file, do:
 from train import get_params, get_transducer_model
 
 
-def test_model():
+def test_model_1():
     params = get_params()
     params.vocab_size = 500
     params.blank_id = 0
@@ -39,8 +39,26 @@ def test_model():
     print(f"Number of model parameters: {num_param}")
 
 
+# See Table 1 from https://arxiv.org/pdf/2005.08100.pdf
+def test_model_M():
+    params = get_params()
+    params.vocab_size = 500
+    params.blank_id = 0
+    params.context_size = 2
+    params.num_encoder_layers = 18
+    params.dim_feedforward = 1024
+    params.encoder_dim = 256
+    params.nhead = 4
+    params.decoder_dim = 512
+    params.joiner_dim = 512
+    model = get_transducer_model(params)
+    num_param = sum([p.numel() for p in model.parameters()])
+    print(f"Number of model parameters: {num_param}")
+
+
 def main():
-    test_model()
+    #  test_model_1()
+    test_model_M()
 
 
 if __name__ == "__main__":

egs/librispeech/ASR/pruned_transducer_stateless4/train.py

@@ -83,6 +83,53 @@ LRSchedulerType = Union[
 ]
 
 
+def add_model_arguments(parser: argparse.ArgumentParser):
+    parser.add_argument(
+        "--num-encoder-layers",
+        type=int,
+        default=24,
+        help="Number of conformer encoder layers..",
+    )
+
+    parser.add_argument(
+        "--dim-feedforward",
+        type=int,
+        default=1536,
+        help="Feedforward dimension of the conformer encoder layer.",
+    )
+
+    parser.add_argument(
+        "--nhead",
+        type=int,
+        default=8,
+        help="Number of attention heads in the conformer encoder layer.",
+    )
+
+    parser.add_argument(
+        "--encoder-dim",
+        type=int,
+        default=384,
+        help="Attention dimension in the conformer encoder layer.",
+    )
+
+    parser.add_argument(
+        "--decoder-dim",
+        type=int,
+        default=512,
+        help="Embedding dimension in the decoder model.",
+    )
+
+    parser.add_argument(
+        "--joiner-dim",
+        type=int,
+        default=512,
+        help="""Dimension used in the joiner model.
+        Outputs from the encoder and decoder model are projected
+        to this dimension before adding.
+        """,
+    )
+
+
 def get_parser():
     parser = argparse.ArgumentParser(
         formatter_class=argparse.ArgumentDefaultsHelpFormatter
@@ -156,15 +203,16 @@ def get_parser():
         "--initial-lr",
         type=float,
         default=0.003,
-        help="The initial learning rate.  This value should not need to be changed.",
+        help="The initial learning rate.  This value should not need "
+        "to be changed.",
     )
 
     parser.add_argument(
         "--lr-batches",
         type=float,
         default=5000,
-        help="""Number of steps that affects how rapidly the learning rate decreases.
-        We suggest not to change this.""",
+        help="""Number of steps that affects how rapidly the learning rate
+        decreases. We suggest not to change this.""",
     )
 
     parser.add_argument(
@@ -262,6 +310,8 @@ def get_parser():
         help="Whether to use half precision training.",
     )
 
+    add_model_arguments(parser)
+
     return parser
 
 
@@ -322,14 +372,6 @@ def get_params() -> AttributeDict:
             # parameters for conformer
             "feature_dim": 80,
             "subsampling_factor": 4,
-            "encoder_dim": 384,
-            "nhead": 8,
-            "dim_feedforward": 1536,
-            "num_encoder_layers": 24,
-            # parameters for decoder
-            "decoder_dim": 512,
-            # parameters for joiner
-            "joiner_dim": 512,
             # parameters for Noam
             "model_warm_step": 3000,  # arg given to model, not for lrate
             "env_info": get_env_info(),