What this means is that you can load all of your CDs into the system, have them copied, and then during playback the unit accesses a huge database to add track info. Things like album, artist and track names are a given, but the Gracenote system adds additional proprietary data like genre, artist type, era and region of origin. And then your personal collection can be searched and custom playlists developed using the data. How very iPod. Similar systems exist, but none are quite like Gracenote, and none have been factory available in the States until now.
[Source: just-auto - sub. req.]