(19)

(11)

EP 0 692 134 A1

(12)

(43) Date of publication: 17.01.1996 Bulletin 1996/03 (21) Application number: 94911271.0 (22) Date of filing: 31.03.1994

(51) International Patent Classification (IPC):  G10L 15/ 28( . ) G10L 15/ 18( . ) G10L 15/ 08( . ) G10L 15/ 14( . ) (86) International application number: PCT/GB1994/000704 (87) International publication number: WO 1994/023424 (13.10.1994 Gazette 1994/23)

(84) Designated Contracting States: BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 31.03.1993 EP 19930302538 25.06.1993 EP 19930304993 (71) Applicant: BRITISH TELECOMMUNICATIONS public limited company London EC1A 7AJ (GB)	(72) Inventor: SMYTH, Samuel Gavin Felixstowe, Suffolk IP11 8UA (GB) (74) Representative: Roberts, Simon Christopher, et al  BRITISH TELECOM Intellectual Property Unit 13th Floor 151, Gower Street London, WC1E 6BA London, WC1E 6BA (GB)