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1. WO2000044177 - METHOD AND ARRANGEMENT FOR ENCODING VIDEO IMAGES

Publication Number WO/2000/044177
Publication Date 27.07.2000
International Application No. PCT/EP2000/000342
International Filing Date 17.01.2000
IPC
G06T 9/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
9Image coding
H04N 7/50 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
24Systems for the transmission of television signals using pulse code modulation
26using bandwidth reduction
50involving transform and predictive coding
CPC
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 19/149
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
H04N 19/176
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
61in combination with predictive coding
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
Inventors
  • VAN DE SCHAAR-MITREA, Mihaela; NL
Agents
  • SCHMITZ, Herman, J., R.; Internationaal Octrooibureau B.V. Prof Holstlaan 6 NL-5656 AA Eindhoven, NL
Priority Data
99200158.621.01.1999EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND ARRANGEMENT FOR ENCODING VIDEO IMAGES
(FR) PROCEDE ET DISPOSITIF DE CODAGE D'IMAGES VIDEO
Abstract
(EN)
When embedded memory compression is used in the recursive loop of a predictive (MPEG) encoder/decoder, a given compression factor must be achieved. To this end, the image is divided in segments, i.e. groups of (macro)blocks. Each segment is feedforward coded using a quantization strategy such that the compression factor is achieved. This leaves spare bits in the (fixed) segment size. In accordance with the invention, the space left unused by segments is used for refining the quantization of segments having a higher than average activity.
(FR)
L'invention concerne une compression de mémoire intégrée utilisée dans une boucle récursive d'un codeur/décodeur prédictif (MPEG), qui nécessite un facteur de compression donné. Pour ce faire, l'image est divisée en segments, c'est-à-dire en groupes de (macro)blocs. Chaque segment est codé avec correction aval suivant une stratégie de quantification de façon à obtenir le facteur de compression, ce qui permet de laisser des bits libres dans la dimension (fixe) du segment. L'espace laissé libre par les segments permet d'affiner la quantification des segments dont l'activité est supérieure à la moyenne.
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