ISO/IEC 23090-18:2024

Information technology — Coded representation of immersive media — Part 18: Carriage of geometry-based point cloud compression data

This document specifies a media format that enables the storage and delivery of geometry-based point cloud compression data. The geometry-based point cloud compression data can be timed or non-timed. It supports flexible extraction of geometry-based point cloud compression data at delivery or decoding time.

Technologies de l'information — Représentation codée de média immersifs — Partie 18: Transport des données de compression des nuages de points basée sur la géométrie

General Information

• Status: Published
• Publication Date: 11-Jan-2024
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29/WG 3 - MPEG Systems
• Current Stage: 6060 - International Standard published
• Start Date: 12-Jan-2024
• Due Date: 25-Feb-2023
• Completion Date: 12-Jan-2024

Relations

• Amended By: ISO/IEC 23090-18:2024/Amd 1:2024 - Information technology — Coded representation of immersive media — Part 18: Carriage of geometry-based point cloud compression data — Amendment 1: Support for temporal scalability
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO/IEC 23090-18
First edition
Information technology — Coded
2024-01
representation of immersive
media —
Part 18:
Carriage of geometry-based point
cloud compression data
Technologies de l'information — Représentation codée de média
immersifs —
Partie 18: Transport des données de compression des nuages de
points basée sur la géométrie
Reference number
© ISO/IEC 2024
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Published in Switzerland
© ISO/IEC 2024 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Overview . 3
5.1 Overall architecture for carriage of geometry-based point cloud compression data .3
5.2 Referenceable code points.5
5.2.1 Brands .5
5.2.2 Sample entry type .5
5.2.3 Box types .5
5.2.4 Track reference types .6
5.2.5 Entity grouping types .6
5.2.6 Sample grouping types .7
5.2.7 Uniform resource names .7
6 Volumetric media . 7
6.1 Volumetric visual media .7
6.1.1 General .7
6.1.2 Volumetric visual media header .7
6.1.3 Volumetric visual sample entry .8
6.1.4 Volumetric visual sample group entry .8
6.1.5 Volumetric visual samples .8
7 Timed G-PCC data storage in ISOBMFF . 8
7.1 General .8
7.2 Common boxes and data structures .9
7.2.1 G-PCC decoder configuration record .9
7.2.2 G-PCC decoder configuration box .10
7.2.3 G-PCC component information box .10
7.2.4 Tile inventory information sample group . 12
7.3 Single track encapsulation . 12
7.3.1 General . 12
7.3.2 Sample entry . 13
7.3.3 Sample format . 13
7.4 Multiple track encapsulation . 15
7.4.1 General . 15
7.4.2 Sample entry . 15
7.4.3 Sample format .16
7.4.4 Track references.17
7.5 Encapsulation of tiled G-PCC bitstream .17
7.5.1 General .17
7.5.2 G-PCC tile base track .18
7.5.3 G-PCC tile tracks .19
7.5.4 Relationship between samples in G-PCC tile base track and tile track . 20
7.5.5 Track references.21
7.6 Indication of alternatives .21
8 Non-timed G-PCC data storage in ISOBMFF .21
8.1 General .21
8.2 Image item . 22
8.2.1 G-PCC item . . 22
8.2.2 G-PCC tile item . 23
8.3 Image properties . 23

© ISO/IEC 2024 – All rights reserved
iii
8.3.1 G-PCC configuration item property . 23
8.3.2 G-PCC component information item property .24
8.3.3 G-PCC spatial region item property .24
8.3.4 sub-sample item property . 25
8.3.5 G-PCC tile information item property . 25
8.4 Entity grouping . 26
8.4.1 Viewport association . 26
9 Signalling of metadata in ISOBMFF .26
9.1 G-PCC Spatial region information . 26
9.1.1 Information structure . 26
9.1.2 Signalling of static spatial region information . 29
9.1.3 Signalling of dynamic spatial region information . 29
9.2 G-PCC viewport information .32
9.2.1 General .32
9.2.2 Information structure .32
9.2.3 Signalling of static viewport information . 35
9.2.4 Signalling of dynamic viewport information . 36
10 Encapsulation and signalling in DASH . .37
10.1 Single-track mode .
...