(19)

(11)

EP 1 683 108 A2

(12)

(88) Date of publication A3: 29.12.2005 (43) Date of publication: 26.07.2006 Bulletin 2006/30 (21) Application number: 04798412.5 (22) Date of filing: 08.11.2004

(51) International Patent Classification (IPC):  G06T 7/20(2006.01) (86) International application number: PCT/GB2004/004687 (87) International publication number: WO 2005/048196 (26.05.2005 Gazette 2005/21)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL HR LT LV MK YU (30) Priority: 12.11.2003 GB 0326375 (71) Applicant: BRITISH TELECOMMUNICATIONS public limited company London, Greater London EC1A 7AJ (GB)	(72) Inventors: XU, Li-Qun Suffolk IP5 2GT (GB) LANDABASO, Jose Luis Sant Quirze Del Valles, 08192 Barcelona (ES) (74) Representative: Lloyd, Barry George William  BT Group Legal Intellectual Property Department PP C5A BT Centre 81 Newgate Street London EC1A 7AJ London EC1A 7AJ (GB)