(19)

(11)

EP 0 890 266 A1

(12)

(43) Date of publication: 13.01.1999 Bulletin 1999/02 (21) Application number: 97917079.0 (22) Date of filing: 27.03.1997

(51) International Patent Classification (IPC):  H04N 9/ 804( . ) H04N 11/ 20( . ) H04N 5/ 44( . ) (86) International application number: PCT/US1997/005043 (87) International publication number: WO 1997/036428 (02.10.1997 Gazette 1997/42)

(84) Designated Contracting States: BE DE FR GB IT LU NL (30) Priority: 27.03.1996 US 19960014226P (71) Applicant: INTERGRAPH CORPORATION Huntsville, AL 35894-0001 (US)	(72) Inventors: BELOTE, Jeffery, D. Madison, AL 35857 (US) FORD, Jeff, S. Madison, AL 35857 (US) (74) Representative: Froud, Clive, et al  Elkington and Fife Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)