(19)

(11)

EP 1 277 343 A1

(12)

(43) Date of publication: 22.01.2003 Bulletin 2003/04 (21) Application number: 01917454.9 (22) Date of filing: 07.03.2001

(51) International Patent Classification (IPC)7: H04N 7/24 (86) International application number: PCT/IT0100/109 (87) International publication number: WO 0106/9934 (20.09.2001 Gazette 2001/38)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 17.03.2000 IT TO000025 (71) Applicant: Telecom Italia Lab S.p.A. 10148 Torino (IT)	(72) Inventors: FRANCESCHINI, Guido,c/o Cselt S.p.A. I-10148 Torino (IT) PANICCIARI, Paolo,c/o Cselt S.p.A. I-10148 Torino (IT) (74) Representative: Berra, Piero  c/o TELECOM ITALIA LAB S.p.A.,Via G. Reiss Romoli, 274 10148 Torino 10148 Torino (IT)