Hirofumi Inaguma Koji Inoue Masato Mimura Tatsuya Kawahara Social Signal Detection in Spontaneous Dialogue Using Bidirectional LSTM-CTC. 1691-1695 2017 INTERSPEECH https://doi.org/10.21437/Interspeech.2017-457 conf/interspeech/2017 db/conf/interspeech/interspeech2017.html#InagumaIMK17