I think Track ID was/is a service by Sony/Ericsson (phones). It let you put your phone (close) to a music source, after which it compared the just heard sound with a database. If there was a match it sent you information about the artist/song to your phone. I had it on my Sony 880i, a few years back, and it worked good (and made for a nice gadget to show to people, everyone was surprised/mesmerized). Nowadays you can get exactly the same results with apps for your smartphone (Soundhound and Shazam).