(19)

(11)

EP 0 931 415 A1

(12)

(43) Date of publication: 28.07.1999 Bulletin 1999/30 (21) Application number: 97911643.0 (22) Date of filing: 08.10.1997

(51) International Patent Classification (IPC):  H04N 5/ 44( . ) H04N 7/ 025( . ) H04N 7/ 035( . ) H04N 5/ 445( . ) H04N 7/ 03( . ) H04Q 9/ 00( . ) (86) International application number: PCT/US1997/018187 (87) International publication number: WO 1998/016062 (16.04.1998 Gazette 1998/15)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 08.10.1996 US 19960027951P (71) Applicant: Chang, Allen Tustin, CA 92680 (US)	(72) Inventor: Chang, Allen Tustin, CA 92680 (US) (74) Representative: Kinsler, Maureen Catherine, et al  Kilburn & Strode, 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)