ISO/IEC DIS 23090-9

Information technology -- Coded representation of immersive media

Technologies de l'information -- Représentation codée de média immersifs

General Information

• Status: Published
• Publication Date: 30-Mar-2023
• 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 7 - MPEG 3D Graphics coding
• Current Stage: 4099 - Full report circulated: DIS approved for registration as FDIS
• Start Date: 05-Mar-2021

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 23090-9
First edition
2023-03
Information technology — Coded
representation of immersive media —
Part 9:
Geometry-based point cloud
compression
Technologies de l'information — Représentation codée de média
immersifs —
Partie 9: Compression des nuages de points basée sur la géométrie
Reference number
ISO/IEC 23090-9:2023(E)
© ISO/IEC 2023
ISO/IEC 23090-9:2023(E)
© ISO/IEC 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
© ISO/IEC 2023 – All rights reserved

ISO/IEC 23090-9:2023(E)
Contents Page
Foreword .vii
Introduction .viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms . 1
3.2 Terms related to high-level syntax and entropy coding . 3
3.3 Terms related to tree structure . 6
3.4 Terms related to geometry coding. 7
3.5 Terms related to attribute coding . 7
4 Abbreviated terms . 8
5 Conventions . 9
5.1 General . 9
5.2 Symbolic names . 9
5.3 Numerical representation . 10
5.4 Arithmetic operators . 10
5.5 Logical operators . 10
5.6 Relational operators . 10
5.7 Bit-wise operators . 11
5.8 Assignment operators . 11
5.9 Range notation . 11
5.10 Mathematical functions .12
5.10.1 General .12
5.10.2 IntAtan2 .13
5.10.3 IntCos and IntSin . 13
5.10.4 IntSqrt . 14
5.10.5 IntRecipSqrt. 14
5.10.6 Div . 15
5.10.7 Morton .15
5.10.8 FromMorton . 16
5.11 Order of operation precedence . 16
5.12 Named expressions. 17
5.12.1 General . 17
5.12.2 Scope of a named expression . . 18
5.12.3 Arguments of named expressions . 18
5.12.4 Sub-expressions . 19
5.12.5 Definitions with multiple statements . 19
5.12.6 Textual definitions . 19
5.13 Variables, syntax elements and tables. 19
6 Point cloud format and relationship to coded and output representations .20
6.1 General format . 20
6.2 Attributes . 20
6.2.1 General .20
6.2.2 Colour . 20
6.2.3 Opacity . 21
6.2.4 Reflectance . 21
6.2.5 Normal vector . 21
6.2.6 Material identifier . 21
6.2.7 Frame number/index . 21
6.2.8 User defined attributes . 22
6.3 Codec-derived attributes . .22
6.3.1 General .22
iii
© ISO/IEC 2023 – All rights reserved

ISO/IEC 23090-9:2023(E)
6.3.2 Slice identifier .22
6.3.3 Slice tag . 22
6.3.4 Canonical point order . .22
6.3.5 Point Morton order .23
6.4 Coded point cloud format .23
6.4.1 Sequence coordinate system . 23
6.4.2 Coding coordinate system . 24
6.4.3 Coded point cloud sequence . 25
6.4.4 Coded point cloud frame . 25
6.4.5 Slice of a coded point cloud frame . 25
6.4.6 Repetition of slices .26
6.4.7 Relationship between tiles and slices . 26
6.4.8 Parameter sets . 27
6.5 Output point cloud format .28
6.5.1 General .28
6.5.2 Coordinate system .28
6.5.3 Fixed-point conformance output .28
6.5.4 Attributes .28
6.5.5 Output point cloud sequence .28
6.5.6 Output point cloud frame.28
7 Syntax and semantics .
...