(19)

(11)

EP 1 185 899 A2

(12)

(88) Date of publication A3: 13.12.2001 (43) Date of publication: 13.03.2002 Bulletin 2002/11 (21) Application number: 00935314.5 (22) Date of filing: 24.05.2000

(51) International Patent Classification (IPC)7: G02F 1/03, G02F 1/055, H04N 5/335 (86) International application number: PCT/GB0001/979 (87) International publication number: WO 0072/079 (30.11.2000 Gazette 2000/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 24.05.1999 GB 9912072 (71) Applicant: Marconi Applied Technologies Limited London W1J 6AQ (GB)	(72) Inventors: SPENCER, Simon Howard Chelmsford,Essex (GB) PRITCHARD, William Philip Chelmsford,Essex CM1 4AE (GB) (74) Representative: Hucker, Nerys  Marconi Intellectual PropertyMarrable HouseThe VineyardsGt. Baddow ChelmsfordEssex CM2 7QS ChelmsfordEssex CM2 7QS (GB)