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1. DE000069222844 - Verfahren und Gerät zur Bildkompression für Dokumente

Office Allemagne
Numéro de la demande 69222844
Date de la demande 19.11.1992
Numéro de publication 000069222844
Date de publication 10.06.1998
Type de publication T2
CIB
H04N 1/46
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
1Balayage, transmission ou reproduction de documents ou similaires, p.ex. transmission de fac-similés; Leurs détails
46Systèmes de transmission d'images en couleurs
CPC
H04N 1/4074
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
40Picture signal circuits
407Control or modification of tonal gradation or of extreme levels, e.g. background level
4072dependent on the contents of the original
4074using histograms
H04N 19/124
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
H04N 19/126
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
126Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
H04N 19/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
136Incoming video signal characteristics or properties
14Coding unit complexity, e.g. amount of activity or edge presence estimation
H04N 19/146
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
146Data rate or code amount at the encoder output
H04N 19/149
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
146Data rate or code amount at the encoder output
149by estimating the code amount by means of a model, e.g. mathematical model or statistical model
Déposants UNISYS CORP
Inventeurs HIGGINS-LUTHMAN MICHAEL
KIDD ROBERT
KLEIN ROBERT
YEN ROBERT
ZALINSKI CHARLES
Données relatives à la priorité 07796703 21.11.1991 US
9209910 19.11.1992 US
Titre
(DE) Verfahren und Gerät zur Bildkompression für Dokumente
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