questions about why not convert English words to phone?

[lucasjinreal]

the train list something like:

DUMMY1/LJ045-0096.wav|Mrs. De Mohrenschildt thought that Oswald,
DUMMY1/LJ049-0022.wav|The Secret Service believed that it was very doubtful that any President would ride regularly in a vehicle with a fixed top, even though transparent.

why not convert words to phone?

[MaxMax2016]

如果训练数据很充足，神经网络能自动学习到发音规则；如果数据较少，转成音标再训练可以减少发音错误；