(19)

(11)

EP 0 383 902 A1

(12)

(43) Date of publication: 29.08.1990 Bulletin 1990/35 (21) Application number: 89910132.0 (22) Date of filing: 25.08.1989

(51) International Patent Classification (IPC):  H04N 7/ 18( . ) H04N 7/ 00( . ) G05D 1/ 00( . ) H04N 7/ 26( . ) (86) International application number: PCT/GB1989/001018 (87) International publication number: WO 1990/002370 (08.03.1990 Gazette 1990/06)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.08.1988 GB 19880020417 (71) Applicant: PLESSEY OVERSEAS LIMITED Ilford Essex IG1 4AQ (GB)	(72) Inventors: BLISSETT, Rodney, John Romsey Hampshire (GB) HARRIS, Christopher, George Hampshire (GB) CHARNLEY, Debra Locks Heath Southampton Hampshire (GB) (74) Representative: Pritchard, Evan  Intellectual Property Department The Plessey Company plc Vicarage Lane Ilford Essex IG1 4AQ Ilford Essex IG1 4AQ (GB)