ISO/IEC 23090-22:2024
(Main)Information technology — Coded representation of immersive media — Part 22: Conformance for G-PCC
Information technology — Coded representation of immersive media — Part 22: Conformance for G-PCC
This document specifies a set of tests and procedures designed to indicate whether encoders or decoders meet the normative requirements specified in ISO/IEC 23090-9.
Technologies de l'information — Représentation codée de média immersifs — Partie 22: Conformité pour G-PCC
General Information
Standards Content (Sample)
International
Standard
ISO/IEC 23090-22
First edition
Information technology — Coded
2024-09
representation of immersive media —
Part 22:
Conformance for G-PCC
Technologies de l'information — Représentation codée de média
immersifs —
Partie 22: Conformité pour G-PCC
Reference number
© ISO/IEC 2024
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© ISO/IEC 2024 – All rights reserved
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Conventions . 2
6 Conformance testing for ISO/IEC 23090-9 . 2
6.1 General .2
6.2 Bitstream conformance .2
6.3 Decoder conformance .2
6.4 Procedure to test bitstreams .2
6.5 Procedure to test decoder conformance .3
6.5.1 Conformance bitstreams .3
6.5.2 Contents of the bitstream file .3
6.5.3 Requirements on output of the decoding process .3
6.5.4 Recommendations.3
6.6 Specification of the test bitstreams .4
6.6.1 General .4
6.6.2 Test bitstreams .5
Annex A (informative) Conformance bitstream generation guidelines . 76
© ISO/IEC 2024 – All rights reserved
iii
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/
IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
A list of all parts in the ISO/IEC 23090 series series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.
© ISO/IEC 2024 – All rights reserved
iv
Introduction
Advance in 3D capturing and rendering technologies is enabling new applications and services in the
field of assisted and autonomous driving, maps, cultural heritage, industrial processes, immersive real-
time communication, and Virtual/Augmented/Mixed reality (VR/AR/MR) content creation, transmission
and communication. Point clouds have arisen as one of the main representations for such applications. A
point cloud frame consists of a set of 3D points. Each point, in addition to having a 3D position may also be
associated with numerous other attributes such as colour, transparency, reflectance, timestamp, surface
normal, and classification. Such representations require a large amount of data, which can be costly in terms
of storage and transmission. Therefore, ISO/IEC 23090-9 specifies Geometry-based Point Cloud Compression
(G-PCC), which aims at efficiently compressing point cloud representations.
This document is the conformance testing specification for ISO/IEC 23090-9.
© ISO/IEC 2024 – All rights reserved
v
International Standard ISO/IEC 23090-22:2024(en)
Information technology — Coded representation of
immersive media —
Part 22:
Conformance for G-PCC
1 Scope
This document specifies a set of tests and procedures designed to indicate whether encoders or decoders
meet the normative requirements specified in ISO/IEC 23090-9.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO/IEC 23090-9, Information technology — Coded representation of immersive media — Part 9: Geometry-
based point cloud compression
ISO/IEC 23090-21, Information technology — Coded representation of immersive media — Part 21: Reference
software for Geometry-based Point Cloud Compression (G-PCC)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 23090-9 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
bitstream
sequence of bits
Note 1 to entry: An ISO/IEC 23090-9 G-PCC bitstream.
3.2
decoding process
process that restores information from a coded representation to the original form according to a given code
Note 1 to entry: An embodiment of the decoding process specified by ISO/IEC 23090-9.
3.3
decoder
embodiment of a decoding process (3.2)
Note 1 to entry: An ISO/IEC 23090-9 G-PCC decoder. The decoder does not include the rendering and display process,
which is outside the scope of this document.
© ISO/IEC 2024 – All rights reserved
3.4
encoder
embodiment of a process that produces a bitstream (3.1)
3.5
reference software decoder
particular decoder (3.3) provided as a software package for use as an example available for study, as a
potential starting basis for the development of other decoder, as a way of testing bitstreams for conformance
to a decoding process specification, or as a reference for comparison with the behaviour of other decoder
Note 1 to entry: A software decoder is provided in ISO/IEC 23090-21.
3.6
reference software encoder
particular encoder (3.4) provided as a software package for use as an example available for study, as a
potential starting basis for the development of other encoder, or as a reference for comparison with the
behaviour of other encoder
Note 1 to entry: A software encoder is provided in ISO/IEC 23090-21.
4 Abbreviated terms
For the purposes of this document, relevant abbreviated terms are specified in ISO/IEC 23090-9:2023,
Clause 4.
5 Conventions
For the purposes of this document, relevant conventions are specified in ISO/IEC 23090-9:2023, Clause 5.
6 Conformance testing for ISO/IEC 23090-9
6.1 General
The following subclauses specify the tests for verifying conformance of bitstreams as well as decoders.
These tests shall use the test data (bitstream test suites) provided in https:// standards .iso .org/ iso -iec/
23090/ -22/ ed -1/ en and the reference software decoder is specified in Rec. ISO/IEC 23090-21.
6.2 Bitstream conformance
The bitstream conformance follows the specification text in ISO/IEC 23090-9. See Annex A.
6.3 Decoder conformance
The decoder conformance for ISO/IEC 23090-9, such as conformance point, is specified in
ISO/IEC 23090-9:2023, 6.5.1.
6.4 Procedure to test bitstreams
A bitstream that claims conformance with ISO/IEC 23090-9 shall pass the following test.
The bitstream shall be decoded by processing it with the reference software decoder. When processed by
the reference software decoder, the bitstream shall not cause any error or non-conformance messages to be
reported by the reference software decoder. This test should not be applied to bitstreams that are known to
contain errors introduced by transmission, as such errors are highly likely to result in bitstreams that lack
conformance to ISO/IEC 23090-9.
© ISO/IEC 2024 – All rights reserved
Successfully passing the reference software decoder test provides only a strong presumption that the
bitstream under test does indeed meet all the requirements (except Annex C) specified in ISO/IEC 23090-9
that are tested by the reference software decoder.
ISO/IEC 23090-9 contains several informative recommendations that are not an integral part of that
International Standard. When testing a bitstream for conformance, it can also be useful to test whether or
not the bitstream follows those recommendations.
To check correctness of a bitstream, it is necessary to parse the entire bitstream and to extract all the
syntax elements and other values derived from those syntactic elements and used by the decoding process
specified in ISO/IEC 23090-9.
A verifier may not necessarily perform all stages of the decoding process specified in ISO/IEC 23090-9 in
order to verify bitstream correctness. Many tests can be performed on syntax elements in a state prior to
their use in some processing stages.
6.5 Procedur
...
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