EP 1428392 A2 20040616 - METHOD AND DEVICE FOR COMPRESSING DATA TO BE TRANSMITTED AT CONSTANT BIT RATE
Title (en)
METHOD AND DEVICE FOR COMPRESSING DATA TO BE TRANSMITTED AT CONSTANT BIT RATE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR KOMPRIMIERUNG VON MIT KONSTANTER RATE ZU ÜBERTRAGENDEN DATEIEN
Title (fr)
PROCEDE ET DISPOSITIF POUR LA COMPRESSION DE DONNEES DEVANT ETRE TRANSMISES AVEC UN DEBIT CONSTANT
Publication
Application
Priority
- FR 0203106 W 20020912
- FR 0111851 A 20010913
Abstract (en)
[origin: FR2829657A1] The compression method produces digital word blocks transformed by an orthogonal transformer (12) and quantizes (14) the coefficients. An entropy code (20) of the coefficients is produced, and the coded words are temporarily held in a memory (18). The quantization steps are controlled so that the number of bits in the coded blocks is approximately equal to the number of bits removed from the memory, taking account (54) of the measured data rate of the previous block. An Independent claim is included for the application of the method of the invention to the transmission of images of the earth's surface from a satellite.
IPC 1-7
IPC 8 full level
G06T 9/00 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01)
CPC (source: EP US)
H04N 19/126 (2014.11 - EP US); H04N 19/149 (2014.11 - EP US); H04N 19/15 (2014.11 - EP US); H04N 19/152 (2014.11 - EP US); H04N 19/154 (2014.11 - EP US); H04N 19/182 (2014.11 - EP US); H04N 19/196 (2014.11 - EP US); H04N 19/198 (2014.11 - EP US); H04N 19/60 (2014.11 - EP US); H04N 19/10 (2014.11 - EP US); H04N 19/115 (2014.11 - EP US); H04N 19/134 (2014.11 - EP US); H04N 19/146 (2014.11 - EP US); H04N 19/63 (2014.11 - EP US)
Citation (search report)
See references of WO 03024118A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
FR 2829657 A1 20030314; FR 2829657 B1 20040206; AU 2002362297 A1 20030324; CA 2459909 A1 20030320; CA 2459909 C 20111115; EP 1428392 A2 20040616; US 2004197024 A1 20041007; US 7336843 B2 20080226; WO 03024118 A2 20030320; WO 03024118 A3 20040219
DOCDB simple family (application)
FR 0111851 A 20010913; AU 2002362297 A 20020912; CA 2459909 A 20020912; EP 02798008 A 20020912; FR 0203106 W 20020912; US 48708204 A 20040219