Sequence-to-sequence (Seq2seq) Input a sequence,output a sequence The output length is determined by model. Speech 你好嗎 Recognition N T 機 器學 習 machine learning Machine Translation N N' machine learning 機器學習 Speech Translation Language without text 2Speech Recognition N T Input a sequence, output a sequence The output length is determined by model. Machine Translation N N’ 機 器 學 習 machine learning Sequence-to-sequence (Seq2seq) Speech Translation 機 器 學 習 machine learning 你 好 嗎 Language without text 2