Minor fixes.

egs/librispeech/ASR/pruned_transducer_stateless2/test_model.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+# Copyright    2022  Xiaomi Corp.        (authors: Fangjun Kuang)
+#
+# See ../../../../LICENSE for clarification regarding multiple authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""
+To run this file, do:
+
+    cd icefall/egs/librispeech/ASR
+    python ./pruned_transducer_stateless2/test_model.py
+"""
+
+from train import get_params, get_transducer_model
+
+
+def test_model():
+    params = get_params()
+    params.vocab_size = 500
+    params.blank_id = 0
+    params.context_size = 2
+    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()
+
+
+if __name__ == "__main__":
+    main()

egs/librispeech/ASR/pruned_transducer_stateless4/conformer.py

@@ -296,7 +296,7 @@ class ConformerEncoder(nn.Module):
         assert num_layers - 1 not in aux_layers
         self.aux_layers = set(aux_layers + [num_layers - 1])
 
-        num_channels = encoder_layer.norm_final.weight.numel()
+        num_channels = encoder_layer.norm_final.num_channels
         self.combiner = RandomCombine(
             num_inputs=len(self.aux_layers),
             num_channels=num_channels,

egs/librispeech/ASR/pruned_transducer_stateless4/test_model.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+# Copyright    2022  Xiaomi Corp.        (authors: Fangjun Kuang)
+#
+# See ../../../../LICENSE for clarification regarding multiple authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+"""
+To run this file, do:
+
+    cd icefall/egs/librispeech/ASR
+    python ./pruned_transducer_stateless4/test_model.py
+"""
+
+from train import get_params, get_transducer_model
+
+
+def test_model():
+    params = get_params()
+    params.vocab_size = 500
+    params.blank_id = 0
+    params.context_size = 2
+    params.num_encoder_layers = 24
+    params.dim_feedforward = 1536  # 384 * 4
+    params.encoder_dim = 384
+    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()
+
+
+if __name__ == "__main__":
+    main()

egs/librispeech/ASR/pruned_transducer_stateless4/train.py

@@ -21,22 +21,22 @@ Usage:
 
 export CUDA_VISIBLE_DEVICES="0,1,2,3"
 
-./pruned_transducer_stateless2/train.py \
+./pruned_transducer_stateless4/train.py \
   --world-size 4 \
   --num-epochs 30 \
   --start-epoch 0 \
-  --exp-dir pruned_transducer_stateless2/exp \
+  --exp-dir pruned_transducer_stateless4/exp \
   --full-libri 1 \
   --max-duration 300
 
 # For mix precision training:
 
-./pruned_transducer_stateless2/train.py \
+./pruned_transducer_stateless4/train.py \
   --world-size 4 \
   --num-epochs 30 \
   --start-epoch 0 \
   --use_fp16 1 \
-  --exp-dir pruned_transducer_stateless2/exp \
+  --exp-dir pruned_transducer_stateless4/exp \
   --full-libri 1 \
   --max-duration 550
 
@@ -138,7 +138,7 @@ def get_parser():
     parser.add_argument(
         "--exp-dir",
         type=str,
-        default="pruned_transducer_stateless2/exp",
+        default="pruned_transducer_stateless4/exp",
         help="""The experiment dir.
         It specifies the directory where all training related
         files, e.g., checkpoints, log, etc, are saved
@@ -322,10 +322,10 @@ def get_params() -> AttributeDict:
             # parameters for conformer
             "feature_dim": 80,
             "subsampling_factor": 4,
-            "encoder_dim": 512,
+            "encoder_dim": 384,
             "nhead": 8,
-            "dim_feedforward": 2048,
+            "dim_feedforward": 1536,
-            "num_encoder_layers": 12,
+            "num_encoder_layers": 24,
             # parameters for decoder
             "decoder_dim": 512,
             # parameters for joiner