(19)

(11)

EP 0 208 712 A1

(12)

(43) Date of publication: 21.01.1987 Bulletin 1987/04 (21) Application number: 86900480.0 (22) Date of filing: 11.12.1985

(51) International Patent Classification (IPC):  G10L 19/ 02( . ) G10L 21/ 02( . ) (86) International application number: PCT/US1985/002448 (87) International publication number: WO 1986/003872 (03.07.1986 Gazette 1986/14)

(84) Designated Contracting States: BE DE FR GB IT (30) Priority: 20.12.1984 US 19840684382 14.11.1985 US 19850798174 (71) Applicant: GTE LABORATORIES INCORPORATED Wilmington, DE 19800 (US)	(72) Inventors: ZIBMAN, Israel, Bernard Newton, MA 02159 (US) MAZOR, Baruch Newton Centre, MA 02159 (US) VEENEMAN, Dale, E. Southborough, MA 01722 (US) (74) Representative: Patentanwälte Grünecker, Kinkeldey, Stockmair & Partner  Maximilianstrasse 58 D-80538 München D-80538 München (DE)