(19)

(11)

EP 1 974 189 A2

(12)

(88) Date of publication A3: 07.09.2007 (43) Date of publication: 01.10.2008 Bulletin 2008/40 (21) Application number: 07716686.6 (22) Date of filing: 17.01.2007

(51) International Patent Classification (IPC):  G01D 7/02(2006.01) G01D 7/08(2006.01) (86) International application number: PCT/US2007/001138 (87) International publication number: WO 2007/084505 (26.07.2007 Gazette 2007/30)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 19.01.2006 US 760803 P (71) Applicant: DOLBY LABORATORIES LICENSING CORPORATION San Francisco, California 94103-4813 (US)	(72) Inventor: JACKSON, Bruce Robert San Francisco, California 94103-4813 (US) (74) Representative: Hoffmann, Eckart  Patentanwalt, Bahnhofstrasse 103 82166 Gräfelfing 82166 Gräfelfing (DE)