How do computers translate text to voice and vice versa?

Episode 1264 (50:16)

Charlie from La Canada Flintridge, CA

Charlie has a Samsung mobile phone and he's amazed with its accessibility features that read text aloud. How does that work? Leo says that Samsung uses their own voice dictation called S Voice and Google has their own voice dictation service that is quite good. Samsung uses Nuance, which has been in this game for decades with Dragon Dictate. It used to be a real challenge, but Leo says that thanks to Nuance and Google, voice dictation is light years better now. Leo also says that with Amazon Echo, it's even more advanced.

There are some challenges, like punctuation and context. Say "period," and it could give you a "." But they're getting better at it.