(19)

(11)

EP 1 410 686 A2

(12)

(88) Date of publication A3: 19.02.2004 (43) Date of publication: 21.04.2004 Bulletin 2004/17 (21) Application number: 02720929.5 (22) Date of filing: 07.02.2002

(51) International Patent Classification (IPC)7: H04S 3/00 (86) International application number: PCT/US2002/003619 (87) International publication number: WO 2002/063925 (15.08.2002 Gazette 2002/33)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 07.02.2001 US 267284 P (71) Applicant: Dolby Laboratories Licensing Corporation San FranciscoCalifornia 94103 (US)	(72) Inventor: DAVIS, Mark, Franklin San Francisco, CA 94103 (US) (74) Representative: Hoffmann, Eckart, Dipl.-Ing.  Patentanwalt,Bahnhofstrasse 103 82166 Gräfelfing 82166 Gräfelfing (DE)