US 7,565,064 B2
	Method and device for updating a local copy of metadata
Dirk Adolph, Ronnenberg (Germany); Stefan Kubsch, Hohnhorst (Germany); Hui Li, Hannover (Germany); Harald Schiller, Hannover (Germany); and Wolfgang Klausberger, Hannover (Germany)
Assigned to Thomson Licensing, Boulogne-Billancourt (France)
Filed on Aug. 24, 2004, as Appl. No. 10/925,247.
Claims priority of application No. 03090270 (EP), filed on Aug. 27, 2003.
Prior Publication US 2005/0050518 A1, Mar. 03, 2005
Int. Cl. H04N 9/79 (2006.01); H04N 5/00 (2006.01)

U.S. Cl. 386—126  [386/45]

5 Claims

1. Method of updating a local copy of metadata, the method including the steps: reading first change history data of metadata from an optical storage medium; reading second change history data of metadata, which the second change history data of metadata represents a local copy of said first change history data of metadata from a local storage of at least one of a playback and recording device for said optical storage medium; comparing said first change history data of metadata read from said optical storage medium with said second change history data of metadata read from said local storage of said at least one playback and recording device; if the first and second change history data are different, reading a change attribute from said optical storage medium and performing at least one of the following steps depending on said change attribute determining an update operation of the metadata stored in said local storage and an update operation in said optical storage medium.