Techniques for transferring stored data between a media player and an accessory. In one set of embodiments, one of the media player and the accessory can obtain a unique identifier for a particular file stored in the other of the media player and the accessory. The one of the media player and the accessory...http://www.google.com.tw/patents/US8006019?utm_source=gb-gplus-share專利 US8006019 - Method and system for transferring stored data between a media player and an accessory
