Global Patent Index - EP 1020083 A1

EP 1020083 A1 2000-07-19 - METHOD FOR CONTROLLING THE COMPRESSION RATE OF DIGITAL IMAGES

Title (en)

METHOD FOR CONTROLLING THE COMPRESSION RATE OF DIGITAL IMAGES

Title (de)

VERFAHREN ZUR KONTROLLE DES KOMPRESSIONSVERHÄLTNISSES VON NUMERISCHEN BILDERN

Title (fr)

PROCEDE DE CONTROLE DU TAUX DE COMPRESSION D'IMAGES NUMERIQUES

Publication

EP 1020083 A1 (FR)

Application

EP 98943619 A

Priority

  • CH 9800413 W
  • FR 9712562 A

Abstract (en)

[origin: FR2769161A1] In the Joint Photographic Expert Group Compression system, some parts of the picture are compressed and others are not. The process uses an approximation to the compression factor curve with a scale factor input to set the compression factor required.

IPC 1-7 (main, further and additional classification)

H04N 7/30; G06T 9/00; H03M 7/30

IPC 8 full level (invention and additional information)

G06T 9/00 (2006.01); H03M 7/30 (2006.01); H04N 1/41 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01)

CPC (invention and additional information)

H04N 19/192 (2014.11); H04N 19/126 (2014.11); H04N 19/152 (2014.11); H04N 19/176 (2013.01); H04N 19/60 (2014.11); H04N 19/146 (2014.11)

Citation (search report)

See references of WO 9918734A1

Designated contracting state (EPC)

CH DE FR GB IT LI NL

EPO simple patent family

FR 2769161 A1 19990402; FR 2769161 B1 19991224; AU 9150498 A 19990427; CN 1134169 C 20040107; CN 1280745 A 20010117; EP 1020083 A1 20000719; JP 2001519631 A 20011023; US 6668089 B1 20031223; WO 9918734 A1 19990415

INPADOC legal status


2007-05-02 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20061020

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000502

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): CH DE FR GB IT LI NL