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私は音声シーケンス認識のためにctc損失のblstmをトレーニングしようとしています。トレーニング中にケラスエラーのあるctc blstm
def ctc_lambda_func(args):
y_pred, labels, input_length, label_length = args
# the 2 is critical here since the first couple outputs of the RNN
# tend to be garbage:
y_pred = y_pred[:, 2:, :]
ctc_batch_loss = K.ctc_batch_cost(labels, y_pred, input_length, label_length)
return ctc_batch_loss
私は信じている：
W tensorflow/core/framework/op_kernel.cc:993] Invalid argument: slice index 0 of dimension 0 out of bounds.
[[Node: ctc/scan/strided_slice = StridedSlice[Index=DT_INT32, T=DT_INT32, begin_mask=0, ellipsis_mask=0, end_mask=0, new_axis_mask=0, shrink_axis_mask=1, _device="/job:localhost/replica:0/task:0/gpu:0"](ctc/scan/Shape, ctc/scan/strided_slice/stack, ctc/scan/strided_slice/stack_1, ctc/scan/strided_slice/stack_2)]]
Traceback (most recent call last):
File "speech_lstm_ctc.py", line 212, in <module>
callbacks=[earlystopping, checkpoint, data_gen])
File "/usr/local/lib/python2.7/dist-packages/keras/legacy/interfaces.py", line 88, in wrapper
return func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/keras/engine/training.py", line 1876, in fit_generator
class_weight=class_weight)
File "/usr/local/lib/python2.7/dist-packages/keras/engine/training.py", line 1620, in train_on_batch
outputs = self.train_function(ins)
File "/usr/local/lib/python2.7/dist-packages/keras/backend/tensorflow_backend.py", line 2073, in __call__
feed_dict=feed_dict)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/client/session.py", line 767, in run
run_metadata_ptr)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/client/session.py", line 965, in _run
feed_dict_string, options, run_metadata)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/client/session.py", line 1015, in _do_run
target_list, options, run_metadata)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/client/session.py", line 1035, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.InvalidArgumentError: slice index 0 of dimension 0 out of bounds.
[[Node: ctc/scan/strided_slice = StridedSlice[Index=DT_INT32, T=DT_INT32, begin_mask=0, ellipsis_mask=0, end_mask=0, new_axis_mask=0, shrink_axis_mask=1, _device="/job:localhost/replica:0/task:0/gpu:0"](ctc/scan/Shape, ctc/scan/strided_slice/stack, ctc/scan/strided_slice/stack_1, ctc/scan/strided_slice/stack_2)]]
[[Node: ctc/scan/while/Less_1/_77 = _Recv[client_terminated=false, recv_device="/job:localhost/replica:0/task:0/cpu:0", send_device="/job:localhost/replica:0/task:0/gpu:0", send_device_incarnation=1, tensor_name="edge_981_ctc/scan/while/Less_1", tensor_type=DT_BOOL, _device="/job:localhost/replica:0/task:0/cpu:0"](^_cloopctc/scan/while/TensorArrayReadV3/_17)]]
Caused by op u'ctc/scan/strided_slice', defined at:
File "speech_lstm_ctc.py", line 189, in <module>
loss_out = Lambda(ctc_lambda_func, output_shape=(1,), name="ctc")([y_pred, labels, input_length, label_length])
File "/usr/local/lib/python2.7/dist-packages/keras/engine/topology.py", line 554, in __call__
output = self.call(inputs, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/keras/layers/core.py", line 659, in call
return self.function(inputs, **arguments)
File "speech_lstm_ctc.py", line 141, in ctc_lambda_func
ctc_batch_loss = K.ctc_batch_cost(labels, y_pred, input_length, label_length)
File "/usr/local/lib/python2.7/dist-packages/keras/backend/tensorflow_backend.py", line 3258, in ctc_batch_cost
sparse_labels = tf.to_int32(ctc_label_dense_to_sparse(y_true, label_length))
File "/usr/local/lib/python2.7/dist-packages/keras/backend/tensorflow_backend.py", line 3222, in ctc_label_dense_to_sparse
initializer=init, parallel_iterations=1)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/functional_ops.py", line 524, in scan
n = array_ops.shape(elems_flat[0])[0]
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/array_ops.py", line 495, in _SliceHelper
name=name)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/array_ops.py", line 653, in strided_slice
shrink_axis_mask=shrink_axis_mask)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/gen_array_ops.py", line 3688, in strided_slice
shrink_axis_mask=shrink_axis_mask, name=name)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/op_def_library.py", line 763, in apply_op
op_def=op_def)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/ops.py", line 2327, in create_op
original_op=self._default_original_op, op_def=op_def)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/framework/ops.py", line 1226, in __init__
self._traceback = _extract_stack()
InvalidArgumentError (see above for traceback): slice index 0 of dimension 0 out of bounds.
[[Node: ctc/scan/strided_slice = StridedSlice[Index=DT_INT32, T=DT_INT32, begin_mask=0, ellipsis_mask=0, end_mask=0, new_axis_mask=0, shrink_axis_mask=1, _device="/job:localhost/replica:0/task:0/gpu:0"](ctc/scan/Shape, ctc/scan/strided_slice/stack, ctc/scan/strided_slice/stack_1, ctc/scan/strided_slice/stack_2)]]
[[Node: ctc/scan/while/Less_1/_77 = _Recv[client_terminated=false, recv_device="/job:localhost/replica:0/task:0/cpu:0", send_device="/job:localhost/replica:0/task:0/gpu:0", send_device_incarnation=1, tensor_name="edge_981_ctc/scan/while/Less_1", tensor_type=DT_BOOL, _device="/job:localhost/replica:0/task:0/cpu:0"](^_cloopctc/scan/while/TensorArrayReadV3/_17)]]
CTC損失を実装する機能は以下の通りです：私は、実行中のコードを得ることができたが、訓練は次のエラーを有する第二エポックの特定の段階で失敗します異なる入力であっても同じステップで毎回表示されるため、エラーは特定の入力と関係しないことに注意してください。
何が原因である可能性がありますか？