def decode_layer(self, input_, dilation, layer_no):
options = self.options
# Input dimension
in_dim = input_.get_shape().as_list()[-1]
# Reduce dimension
relu1 = tf.nn.relu(input_, name='dec_relu1_layer{}'.format(layer_no))
conv1 = ops.conv1d(relu1,
in_dim / 2,
name='dec_conv1d_1_layer{}'.format(layer_no))
# 1 x k dilated convolution
relu2 = tf.nn.relu(conv1, name='enc_relu2_layer{}'.format(layer_no))
dilated_conv = ops.dilated_conv1d(
relu2,
output_channels=in_dim / 2,
dilation=dilation,
filter_width=options['decoder_filter_width'],
causal=True,
name="dec_dilated_conv_layer{}".format(layer_no))
# Restore dimension
relu3 = tf.nn.relu(dilated_conv,
name='dec_relu3_layer{}'.format(layer_no))
conv2 = ops.conv1d(relu3,
in_dim,
name='dec_conv1d_2_layer{}'.format(layer_no))
# Residual connection
return input_ + conv2
def encode_layer(self, input_, dilation, layer_no, last_layer=False):
options = self.options
relu1 = tf.nn.relu(input_, name='enc_relu1_layer{}'.format(layer_no))
conv1 = ops.conv1d(relu1,
options['residual_channels'],
name='enc_conv1d_1_layer{}'.format(layer_no))
conv1 = tf.matmul(conv1, self.source_masked_d)
relu2 = tf.nn.relu(conv1, name='enc_relu2_layer{}'.format(layer_no))
dilated_conv = ops.dilated_conv1d(
relu2,
options['residual_channels'],
dilation,
options['encoder_filter_width'],
causal=False,
name="enc_dilated_conv_layer{}".format(layer_no))
dilated_conv = tf.matmul(dilated_conv, self.source_masked_d)
relu3 = tf.nn.relu(dilated_conv,
name='enc_relu3_layer{}'.format(layer_no))
conv2 = ops.conv1d(relu3,
2 * options['residual_channels'],
name='enc_conv1d_2_layer{}'.format(layer_no))
return input_ + conv2
def decode_layer(self, input_, dilation, layer_no):
options = self.options
relu1 = tf.nn.relu(input_, name='dec_relu1_layer{}'.format(layer_no))
conv1 = ops.conv1d(relu1,
options['residual_channels'],
name='dec_conv1d_1_layer{}'.format(layer_no))
relu2 = tf.nn.relu(conv1, name='enc_relu2_layer{}'.format(layer_no))
dilated_conv = ops.dilated_conv1d(
relu2,
options['residual_channels'],
dilation,
options['decoder_filter_width'],
causal=True,
name="dec_dilated_conv_laye{}".format(layer_no))
relu3 = tf.nn.relu(dilated_conv,
name='dec_relu3_layer{}'.format(layer_no))
conv2 = ops.conv1d(relu3,
2 * options['residual_channels'],
name='dec_conv1d_2_layer{}'.format(layer_no))
return input_ + conv2
def decoder(self, input_, encoder_embedding=None):
options = self.options
curr_input = input_
if encoder_embedding is not None:
# CONDITION WITH ENCODER EMBEDDING FOR THE TRANSLATION MODEL
curr_input = tf.concat(2, [input_, encoder_embedding])
print("Decoder Input", curr_input)
for layer_no, dilation in enumerate(options['decoder_dilations']):
curr_input = self.decode_layer(curr_input, dilation, layer_no)
processed_output = ops.conv1d(tf.nn.relu(curr_input),
options['n_target_quant'],
name='decoder_post_processing')
return processed_output
def encoder(self, input_):
options = self.options
curr_input = input_
for layer_no, dilation in enumerate(self.options['encoder_dilations']):
layer_output = self.encode_layer(curr_input, dilation, layer_no)
# ENCODE ONLY TILL THE INPUT LENGTH, conditioning should be 0 beyond that
layer_output = tf.matmul(layer_output,
self.source_masked,
name='layer_{}_output'.format(layer_no))
curr_input = layer_output
# TO BE CONCATENATED WITH TARGET EMBEDDING
processed_output = tf.nn.relu(
ops.conv1d(tf.nn.relu(layer_output),
options['residual_channels'],
name='encoder_post_processing'))
processed_output = tf.matmul(processed_output,
self.source_masked_d,
name='encoder_processed')
return processed_output