当运行我的神经网络（双向LSTM）进行音频识别时，我正在使用Conectionist Temporal Classification（CTC）。但在某些时候，培训网络我几乎每批都会收到Tensorflow的警告。
W tensorflow/core/util/ctc/ctc_loss_calculator.cc:144] No valid path found.
这导致损失无限且训练中断。
Epoch 1/5000, train_cost = inf, train_ler = 3.891, valid_cost = inf, valid_ler = 5.433
Train decoding:
Original: you want to go over and see his gang throw dirt
Decoded: hlvoyvrofuvulovowovwvoxvovoxwyzlwkngitewewewktwlwctnbkmpajxozovofovfvfwnsfvfnfavtieitstyvubeabmbmbjljaceutztqectpmgogovgvovjuvsvsihskikqlvnsmsmsmhmvwiecececeitmhmhfvrf tiet e gekesketksmvamnmamgmnm det ietutswsezvzovovjiecgs gs smsjs s g la ah kjrkmasanxrsdrhdrxgdhdaphxda th sxhsxrdsrsvr krs farsr rdrdakr lrsrsvrsrsrdrsrsraisdsrhrhdrajfrdhxrd d
这究竟是什么意思，我该如何解决这个问题？