(19)
(11) EP 0 986 270 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
08.03.2006 Bulletin 2006/10

(45) Mention of the grant of the patent:
28.12.2005 Bulletin 2005/52

(21) Application number: 99307173.7

(22) Date of filing: 10.09.1999
(51) International Patent Classification (IPC): 
H04N 17/00(1985.01)

(54)

Picture quality measurement using blockiness

Bildqualitätsmessung durch die Gegenwart von Blöcken

Mesure de la qualité d'image utilisant la présence des blocs

(84) Designated Contracting States:
DE FR GB

(30) Priority: 10.09.1998 US 152495

(43) Date of publication of application:
15.03.2000 Bulletin 2000/11

(73) Proprietor: TEKTRONIX, INC.
Beaverton, OR 97077 (US)

(72) Inventors:
  • Janko, Bozidar
    Portland, Oregon 97201 (US)
  • Maurer, Steven D.
    Aloha, Oregon 97007 (US)

(74) Representative: Molyneaux, Martyn William et al
Harrison Goddard Foote 40-43 Chancery Lane
London WC2A 1JA
London WC2A 1JA (GB)


(56) References cited: : 
US-A- 5 446 492
   
  • BEAKLEY G ET AL: "VIDEO COMPRESSION: THE NEED FOR TESTING" SMPTE JOURNAL,US,SMPTE INC. SCARSDALE, N.Y, vol. 104, no. 11, 1 November 1995 (1995-11-01), pages 742-750, XP000540389 ISSN: 0036-1682
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).