A playback apparatus includes a data source (1) that provides a data stream signal (d0), and a device (2) responsive to the data stream signal. The device forms a first data stream (d1) in a first data format (F1), wherein the first data stream (d1) includes a data field (D1) that is encoded in a second...http://www.google.com/patents/US7092340?utm_source=gb-gplus-sharePatent US7092340 - Playback apparatus
