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1. WO2020069601 - METHODS AND DEVICES FOR ON-THE-FLY CODER MAPPING UPDATES IN POINT CLOUD CODING

Publication Number WO/2020/069601
Publication Date 09.04.2020
International Application No. PCT/CA2019/051258
International Filing Date 09.09.2019
IPC
H03M 7/30 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
CPC
H03M 7/30
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same ; , similar or subset of; information is represented by a different sequence or number of digits
30Compression
H03M 7/6035
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same ; , similar or subset of; information is represented by a different sequence or number of digits
30Compression
60General implementation details not specific to a particular type of compression
6035Handling of unkown probabilities
H03M 7/6076
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same ; , similar or subset of; information is represented by a different sequence or number of digits
30Compression
60General implementation details not specific to a particular type of compression
6064Selection of Compressor
6076Selection between compressors of the same type
Applicants
  • BLACKBERRY LIMITED [CA]/[CA]
  • 2236008 ONTARIO INC. [CA]/[CA]
Inventors
  • LASSERRE, Sébastien
  • FLYNN, David
Agents
  • ROWAND LLP
Priority Data
18306304.903.10.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS AND DEVICES FOR ON-THE-FLY CODER MAPPING UPDATES IN POINT CLOUD CODING
(FR) PROCÉDÉS ET DISPOSITIFS POUR DES MISES À JOUR À LA VOLÉE DE LA MISE EN CORRESPONDANCE DE CODEUR DANS LE CODAGE EN NUAGE DE POINTS
Abstract
(EN)
Methods and systems for encoding and decoding data, such as point cloud data. The methods may include using a coder map to map a range of discrete dependency states to a smaller set of binary coders each having an associated coding probability. The selection of one of the discrete dependency states may be based on a contextual or situational factors, which may include a prediction process, for a particular symbol, such as an occupancy bit. The coder map is updated after each symbol is coded to possibly alter to which binary coder the selected discrete dependency state maps.
(FR)
L'invention concerne des procédés et des systèmes de codage et de décodage de données, telles que des données de nuage de points. Les procédés peuvent comprendre l'utilisation d'une mise en correspondance de codeur pour mettre en correspondance une plage d'états de dépendance discrets avec un ensemble plus petit de codeurs binaires ayant chacun une probabilité de codage associée. La sélection de l'un des états de dépendance discrets peut être basée sur des facteurs contextuels ou situationnels, qui peuvent comprendre un processus de prédiction pour un symbole particulier, tel qu'un bit d'occupation. La mise en correspondance de codeur est mise à jour après que chaque symbole est codé pour éventuellement modifier le codeur binaire auquel est mis en correspondance l'état de dépendance discret sélectionné.
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