Global Patent Index - EP 1163800 A1

EP 1163800 A1 2001-12-19 - IMAGE COMPRESSION AND DECOMPRESSION

Title (en)

IMAGE COMPRESSION AND DECOMPRESSION

Title (de)

BILDKOMPRESSION UND BILDDEKOMPRESSION

Title (fr)

COMPRESSION ET DECOMPRESSION D'IMAGES

Publication

EP 1163800 A1 (EN)

Application

EP 00912762 A

Priority

  • GB 0001081 W
  • GB 9906603 A

Abstract (en)

[origin: GB2348334A] Various types of image compression have been proposed. The present invention compresses image data using a predetermined compression technique such as the Microsoft S3 compression scheme. The compressed image is then decompressed and difference values derived between the original image and the decompressed image. The thus derived difference values are then compressed for use in sub-different correction of the decompressed image and are transmitted or stored along with the compressed image data.

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

H04N 7/26

IPC 8 full level (invention and additional information)

H04N 11/04 (2006.01); G06T 9/00 (2006.01); H03M 7/36 (2006.01); H04N 1/387 (2006.01); H04N 1/41 (2006.01); H04N 1/64 (2006.01); H04N 7/32 (2006.01)

CPC (invention and additional information)

H04N 1/648 (2013.01); G06T 9/007 (2013.01); H04N 1/3872 (2013.01); H04N 19/36 (2014.11); H04N 19/60 (2014.11)

Citation (search report)

See references of WO 0057649A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

GB 2348334 A 20000927; GB 9906603 D0 19990519; EP 1163800 A1 20011219; JP 2002540685 A 20021126; WO 0057649 A1 20000928

INPADOC legal status


2003-07-16 [18W] WITHDRAWN

- Effective date: 20030501

2001-12-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20011015

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE