(19)

(11)

EP 0 215 915 A1

(12)

(43) Date of publication: 01.04.1987 Bulletin 1987/14 (21) Application number: 86902188.0 (22) Date of filing: 14.03.1986

(51) International Patent Classification (IPC):  G10L 11/ 00( . ) G10L 19/ 02( . ) G10L 13/ 00( . ) (86) International application number: PCT/US1986/000543 (87) International publication number: WO 1986/005617 (25.09.1986 Gazette 1986/21)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 18.03.1985 US 19850712866 (71) Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY Cambridge, MA 02139 (US)	(72) Inventors: McAULAY, Robert, J. Lexington, MA 02173 (US) QUATIERI, Thomas, F., Jr. West Newton, MA 02165 (US) (74) Representative: Hughes, Brian Patrick  Graham Watt & Co. Riverhead Sevenoaks, Kent TN13 2BN Sevenoaks, Kent TN13 2BN (GB)