|Girl listening to radio|
This captioned video on Youtube does a good job of demonstrating the technology, although it does not go into specifics about how the captions work. While watching the video demonstration of the car technology, it's apparent that the captions are slightly behind the audio.
According to a press release from NPR, "The technology takes advantage of digital radio transmissions to send a closed-captioned transcript of a live broadcast to the screen on a specially built receiver." I wonder what happens when people deviate from the script. It would be neat if this has built-in automatic captioning via voice recognition the same way Youtube's videos do.
NPR also has new technology out for people who are blind or have low vision. It's called Personalized Audio Information Service, and it allows these people to have greater choice in choosing their radio programming by subject. It would also ensure that HD radios can alert listeners to emergency messages.
(via About.com Deafness)