Auto-translater glassis?

I got this news by AFP News in Japanese, ““translater-glasses” made by NEC, we can talk by original language each other“.

This is the picture of image at that news.

Can you believe it?
I wonder how to work it.

You know, auto-translater system at the internet does not works much. Even Japanese to English, Japanese is not clearly their subject.

Too difficult to say in English, but I will try.

Usually, when I talk in Japanese, I often do not use “I”, “you”, or “we”. However, we can get what I say because of whole sentece. I mean we can imagine it.

Like…
“went to seminner, today.” if I say in Japanese.
you may guess I want to say “I went to seminner”.

So that, when I use auto-translater system at the internet, I try to write whole sentence of Japanese, but difficult because I do not use it.

And then, when talk each other, there are a lot of gap for their caltural background. We need to know about their calture for understnd each other, but computer can do that?