def init_asr_model(configs):
if configs['cmvn_file'] is not None:
mean, istd = load_cmvn(configs['cmvn_file'], configs['is_json_cmvn'])
global_cmvn = GlobalCMVN(
torch.from_numpy(mean).float(),
torch.from_numpy(istd).float())
else:
global_cmvn = None
input_dim = configs['input_dim']
vocab_size = configs['output_dim']
encoder_type = configs.get('encoder', 'conformer')
if encoder_type == 'conformer':
encoder = ConformerEncoder(input_dim,
global_cmvn=global_cmvn,
**configs['encoder_conf'])
else:
encoder = TransformerEncoder(input_dim,
global_cmvn=global_cmvn,
**configs['encoder_conf'])
decoder = TransformerDecoder(vocab_size, encoder.output_size(),
**configs['decoder_conf'])
ctc = CTC(vocab_size, encoder.output_size())
model = ASRModel(
vocab_size=vocab_size,
encoder=encoder,
decoder=decoder,
ctc=ctc,
**configs['model_conf'],
)
return model
def init_model(configs):
if configs['cmvn_file'] is not None:
mean, istd = load_cmvn(configs['cmvn_file'], configs['is_json_cmvn'])
global_cmvn = GlobalCMVN(
torch.from_numpy(mean).float(),
torch.from_numpy(istd).float())
else:
global_cmvn = None
input_dim = configs['input_dim']
vocab_size = configs['output_dim']
encoder_type = configs.get('encoder', 'conformer')
decoder_type = configs.get('decoder', 'bitransformer')
if encoder_type == 'conformer':
encoder = ConformerEncoder(input_dim,
global_cmvn=global_cmvn,
**configs['encoder_conf'])
else:
encoder = TransformerEncoder(input_dim,
global_cmvn=global_cmvn,
**configs['encoder_conf'])
if decoder_type == 'transformer':
decoder = TransformerDecoder(vocab_size, encoder.output_size(),
**configs['decoder_conf'])
else:
assert 0.0 < configs['model_conf']['reverse_weight'] < 1.0
assert configs['decoder_conf']['r_num_blocks'] > 0
decoder = BiTransformerDecoder(vocab_size, encoder.output_size(),
**configs['decoder_conf'])
ctc = CTC(vocab_size, encoder.output_size())
# Init joint CTC/Attention or Transducer model
if 'predictor' in configs:
predictor_type = configs.get('predictor', 'rnn')
if predictor_type == 'rnn':
predictor = RNNPredictor(vocab_size, **configs['predictor_conf'])
else:
raise NotImplementedError("only rnn type support now")
configs['joint_conf']['enc_output_size'] = configs['encoder_conf'][
'output_size']
configs['joint_conf']['pred_output_size'] = configs['predictor_conf'][
'output_size']
joint = TransducerJoint(vocab_size, **configs['joint_conf'])
model = Transducer(vocab_size=vocab_size,
blank=0,
predictor=predictor,
encoder=encoder,
attention_decoder=decoder,
joint=joint,
ctc=ctc,
**configs['model_conf'])
else:
model = ASRModel(vocab_size=vocab_size,
encoder=encoder,
decoder=decoder,
ctc=ctc,
**configs['model_conf'])
return model