This is a problem we (accessible.ai) have been working on in the past few months. We're still tuning and improving but with a multi-modal approach of signal pro

This is a problem we (accessible.ai) have been working on in the past few months. We're still tuning and improving but with a multi-modal approach of signal processing, speech recognition and text analysis we were able to come up with a pretty good MVP to solve this issue. You can take a look at our small demo here: http://accessible.ai/nav http://accessible.ai/nav