EP 1639828 A1 20060329 - METHOD FOR TRANSCODING A JPEG2000 COMPRESSED IMAGE
Title (en)
METHOD FOR TRANSCODING A JPEG2000 COMPRESSED IMAGE
Title (de)
VERFAREN ZUR UMKODIERUNG EINES JPEG2000 KOMPRIMIERTES BILD
Title (fr)
PROCEDE DE TRANSCODAGE D'UNE IMAGE COMPRESSEE JPEG2000
Publication
Application
Priority
- US 2004021236 W 20040701
- US 61102603 A 20030701
- US 88110704 A 20040630
Abstract (en)
[origin: WO2005006765A1] A JPEG2000 compressed image is transcoded to a lower bit-rate or lower resolution, or both, without having to decompress the initial JPEG2000 image and then recompress it to a lower bit-rate and/or resolution. Instead, arithmetic decoding is performed only to the nearest higher bit-rate layer, up to the desired resolution, before performing rate-distortion optimization to produce the transcoded image.
IPC 1-7
IPC 8 full level
H04N 7/26 (2006.01)
CPC (source: EP)
H04N 19/147 (2014.11); H04N 19/187 (2014.11); H04N 19/40 (2014.11); H04N 19/63 (2014.11); H04N 19/115 (2014.11); H04N 19/146 (2014.11)
Citation (search report)
See references of WO 2005006765A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2005006765 A1 20050120; EP 1639828 A1 20060329; JP 2007527651 A 20070927
DOCDB simple family (application)
US 2004021236 W 20040701; EP 04777399 A 20040701; JP 2006518774 A 20040701