ISO/IEC 23001-11:2023/Amd 1:2024
(Amendment)Information technology — MPEG systems technologies — Part 11: Energy-efficient media consumption (green metadata) — Amendment 1: Energy-efficient media consumption (green metadata) for EVC
Information technology — MPEG systems technologies — Part 11: Energy-efficient media consumption (green metadata) — Amendment 1: Energy-efficient media consumption (green metadata) for EVC
Technologies de l'information — Technologies des systèmes MPEG — Partie 11: Consommation des supports éconergétiques (métadonnées vertes) — Amendement 1: Titre manque
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Buy Standard
Standards Content (Sample)
International
Standard
ISO/IEC 23001-11
Third edition
Information technology — MPEG
2023-02
systems technologies —
AMENDMENT 1
Part 11:
2024-07
Energy-efficient media consumption
(green metadata)
AMENDMENT 1: Energy-efficient
media consumption (green metadata)
for EVC
Reference number
ISO/IEC 23001-11:2023/Amd. 1:2024(en) © ISO/IEC 2024
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
© ISO/IEC 2024
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO/IEC 2024 – All rights reserved
ii
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
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 14496 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
iii
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
Information technology — MPEG systems technologies —
Part 11:
Energy-efficient media consumption (green metadata)
AMENDMENT 1: Energy-efficient media consumption (green
metadata) for EVC
6.2.1
Replace the following:
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC or VVC bitstream to the decoder.
with:
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC, VVC or EVC bitstream to the decoder.
6.2.2
Add the following at the end of the subclause:
The syntax for the EVC CMs is described in Table X.1:
Table X.1 — Syntax for the HEVC CMs
u(8)
period_type
if (profile_idc == 0) {
if (period_type = = 0 || period_type == 2) {
uk(v)
num_non_zero_4_cus
uk(v)
num_non_zero_8_cus
num_non_zero_16_cus uk(v)
num_non_zero_32_cus uk(v)
num_non_zero_64_cus uk(v)
portion_fractional_prediction_sample u(8)
} else if (period_type = = 1 || period_type == 3) {
num_count u(16)
for (t=0; t
num_non_zero_4_cus [t] uk(v)
uk(v)
num _non_zero_8_cus [t]
num _non_zero_16_cus [t] uk(v)
num _non_zero_32_cus [t] uk(v)
num _non_zero_64_cus [t] uk(v)
© ISO/IEC 2024 – All rights reserved
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
TTaabblle Xe X.1 1 ((ccoonnttiinnueuedd))
u(8)
portion_fractional_prediction_sample [t]
}
}
else if (profile_idc ==1) {
if (period_type = = 0 || period_type == 2) {
num_non_zero_samples uk(v)
num_affine_samples uk(v)
uk(v)
num_dmvr_samples
uk(v)
num_alf_samples
num_deblocking_filter_samples uk(v)
num_htdf_samples uk(v)
} else if (period_type = = 1 || period_type == 3) {
u(8)
num_count
for (t=0; t
num_non_zero_samples [t] uk(v)
num__samples [t] uk(v)
num_dmvr_samples [t] uk(v)
uk(v)
num_alf_samples [t]
num_deblocking_filter_samples [t] uk(v )
num_htdf_samples [t] uk(v )
}
}
}
6.2.4.4
Add the following new subclause after subclause 6.2.4.3:
6.2.4.4 EVC Semantics
6.2.4.4.1 General
As EVC Baseline profile and Main profile share almost no tools and the methods used for partition of the
pictures are not same, the profile the CVS conforming to is used to decide the set of syntax elements to
describe the complexity metrics to be applied to each CVS. In addition, As the largest size of picture is
indicated by the level the CVS is conformed to, the length of the syntax elements indicating the number of
pixels and coding units are decided by the level. In addition, the width and height of the coding units are
also considered when the length of the syntax elements indicating the number of coding units for the CVS
conforming to the baseline profile is decided.
6.2.4.4.2 Variable length syntax element for EVC Semantics
The maximum number of pixels and coding units depend on the size of the picture the complexity metric is
applied to. As the largest size of picture is indicated by the level the CVS is conformed to the length of the
syntax elements indicating the number of pixels and coding units are decided by the levels. In addition, the
width and height of the coding units are also considered when the length of the syntax elements indicating
the number of coding units for the CVS conforming to the baseline profile as the width and height of the
coding units get larger than the maximum number of coding units get smaller.
– uk(v): the field is unsigned integer and the length is decided by the value of the level_idc field in the SPS
used by the CVS this SEI message is applied to and the value of k assigned to each field based on the size
of the units counted. The length of the field according to each value of both level_idc and k is shown in the
Table X.2.
© ISO/IEC 2024 – All rights reserved
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
Table X.2 — length of uk(v)
level value of length of the field
level_idc
k==1 k==4 k==8 k==16 k==32 k==64
1 30 16 16 16 8 8 8
2 60 24 16 16 16 8 8
2.1 63 24 16 16 16 8 8
3 90 24 16 16 16 16 8
3.1 93 24 16 16 16 16 8
4 120 24 24 16 16 16 16
4.1 123 24 24 16 16 16 16
5 150 24 24 24 16 16 16
5.1 153 24 24 24 16 16 16
5.2 156 24 24 24 16 16 16
6 180 32 24 24 24 16 16
6.1 183 32 24 24 24 16 16
6.2 186 32 24 24 24 16 16
6.2.4.4.2 Semantics of EVC CM
profile_idc indicates the profile of the CVS this SEI message is associated with.
period_type specifies the type of upcoming period over which the complexity metrics are applicable and is
defined in the Table X.3.
Table X.3 — specification of period_type for EVC
Value Description
0x0 complexity metrics are applicable to a single picture
0x1 complexity metrics are applicable over a specified number of pictures counted in decoding order
0x2 complexity metrics are applicable to a single slice
0x3 complexity metrics are applicable to a specified number of slices counted in decoding order
0x4-0xF user-defined
num_non_zero_4_cus indicates the number of coding units whose width and height are not greater than 4
samples and have non-zero transform coefficients values in the period complexity metrics is applied to. The
length of this field is decided by the value of the level_idc field in the SPS used by the CVS the SEI message
this field is applied to and the value of the k is equal to 4.
num_non_zero_8_cus indicates the number of coding units whose width and height are 8 samples and have
non-zero transform coefficients values in the period complexity metrics is applied to. The length of this field
is decided by the value of the level_idc field in the SPS used by the CVS the SEI message this field is applied to
and the value of the k is equal to 8.
num_non_zero_16_cus indicates the number of coding units whose width and height are 16 samples and
have non-zero transform coefficients values in the period complexity metrics is applied to. The length of
this field is decided by the value of the level_idc field in the SPS used by the CVS the SEI message th
...
International
Standard
ISO/IEC 23001-11
Third edition
Information technology — MPEG
2023-02
systems technologies —
AMENDMENT 1
Part 11:
Energy-efficient media consumption
(green metadata)
AMENDMENT 1: Energy-efficient
media consumption (green metadata)
for EVC
PROOF/ÉPREUVE
Reference number
ISO/IEC 23001-11/Amd. 1:2024(en) © ISO/IEC 2024
ISO/IEC 23001-11/Amd. 1:2024(en)
© ISO/IEC 2024
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO/IEC 2024 – All rights reserved
ii
ISO/IEC 23001-11/Amd. 1:2024(en)
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 14496 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.
PROOF/ÉPREUVE
© ISO/IEC 2024 – All rights reserved
iii
ISO/IEC 23001-11/Amd. 1:2024(en)
Information technology — MPEG systems technologies —
Part 11:
Energy-efficient media consumption (green metadata)
AMENDMENT 1: Energy-efficient media consumption (green
metadata) for EVC
6.2.1
Replace the following:
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC or VVC bitstream to the decoder.
with:
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC, VVC or EVC bitstream to the decoder.
6.2.2
Add the following at the end of the subclause:
The syntax for the EVC CMs is described in Table X.1:
Table X.1 — Syntax for the HEVC CMs
u(8)
period_type
if (profile_idc == 0) {
if (period_type = = 0 || period_type == 2) {
uk(v)
num_non_zero_4_cus
uk(v)
num_non_zero_8_cus
num_non_zero_16_cus uk(v)
num_non_zero_32_cus uk(v)
num_non_zero_64_cus uk(v)
portion_fractional_prediction_sample u(8)
} else if (period_type = = 1 || period_type == 3) {
num_count u(16)
for (t=0; t
num_non_zero_4_cus [t] uk(v)
uk(v)
num _non_zero_8_cus [t]
num _non_zero_16_cus [t] uk(v)
num _non_zero_32_cus [t] uk(v)
num _non_zero_64_cus [t] uk(v)
PROOF/ÉPREUVE
© ISO/IEC 2024 – All rights reserved
ISO/IEC 23001-11/Amd. 1:2024(en)
TTaabblle Xe X.1 1 ((ccoonnttiinnueuedd))
u(8)
portion_fractional_prediction_sample [t]
}
}
else if (profile_idc ==1) {
if (period_type = = 0 || period_type == 2) {
num_non_zero_samples uk(v)
num_affine_samples uk(v)
uk(v)
num_dmvr_samples
uk(v)
num_alf_samples
num_deblocking_filter_samples uk(v)
num_htdf_samples uk(v)
} else if (period_type = = 1 || period_type == 3) {
u(8)
num_count
for (t=0; t
num_non_zero_samples [t] uk(v)
num__samples [t] uk(v)
num_dmvr_samples [t] uk(v)
uk(v)
num_alf_samples [t]
num_deblocking_filter_samples [t] uk(v )
num_htdf_samples [t] uk(v )
}
}
}
6.2.4.4
Add the following new subclause after subclause 6.2.4.3:
6.2.4.4 EVC Semantics
6.2.4.4.1 General
As EVC Baseline profile and Main profile share almost no tools and the methods used for partition of the
pictures are not same, the profile the CVS conforming to is used to decide the set of syntax elements to
describe the complexity metrics to be applied to each CVS. In addition, As the largest size of picture is
indicated by the level the CVS is conformed to, the length of the syntax elements indicating the number of
pixels and coding units are decided by the level. In addition, the width and height of the coding units are
also considered when the length of the syntax elements indicating the number of coding units for the CVS
conforming to the baseline profile is decided.
6.2.4.4.2 Variable length syntax element for EVC Semantics
The maximum number of pixels and coding units depend on the size of the picture the complexity metric is
applied to. As the largest size of picture is indicated by the level the CVS is conformed to the length of the
syntax elements indicating the number of pixels and coding units are decided by the levels. In addition, the
width and height of the coding units are also considered when the length of the syntax elements indicating
the number of coding units for the CVS conforming to the baseline profile as the width and height of the
coding units get larger than the maximum number of coding units get smaller.
– uk(v): the field is unsigned integer and the length is decided by the value of the level_idc field in the SPS
used by the CVS this SEI message is applied to and the value of k assigned to each field based on the size
of the units counted. The length of the field according to each value of both level_idc and k is shown in the
Table X.2.
PROOF/ÉPREUVE
© ISO/IEC 2024 – All rights reserved
ISO/IEC 23001-11/Amd. 1:2024(en)
Table X.2 — length of uk(v)
level value of length of the field
level_idc
k==1 k==4 k==8 k==16 k==32 k==64
1 30 16 16 16 8 8 8
2 60 24 16 16 16 8 8
2.1 63 24 16 16 16 8 8
3 90 24 16 16 16 16 8
3.1 93 24 16 16 16 16 8
4 120 24 24 16 16 16 16
4.1 123 24 24 16 16 16 16
5 150 24 24 24 16 16 16
5.1 153 24 24 24 16 16 16
5.2 156 24 24 24 16 16 16
6 180 32 24 24 24 16 16
6.1 183 32 24 24 24 16 16
6.2 186 32 24 24 24 16 16
6.2.4.4.2 Semantics of EVC CM
profile_idc indicates the profile of the CVS this SEI message is associated with.
period_type specifies the type of upcoming period over which the complexity metrics are applicable and is
defined in the Table X.3.
Table X.3 — specification of period_type for EVC
Value Description
0x0 complexity metrics are applicable to a single picture
0x1 complexity metrics are applicable over a specified number of pictures counted in decoding order
0x2 complexity metrics are applicable to a single slice
0x3 complexity metrics are applicable to a specified number of slices counted in decoding order
0x4-0xF user-defined
num_non_zero_4_cus indicates the number of coding units whose width and height are not greater than 4
samples and have non-zero transform coefficients values in the period complexity metrics is applied to. The
length of this field is decided by the value of the level_idc field in the SPS used by the CVS the SEI message
this field is applied to and the value of the k is equal to 4.
num_non_zero_8_cus indicates the number of coding units whose width and height are 8 samples and have
non-zero transform coefficients values in the period complexity metrics is applied to. The length of this field
is decided by the value of the level_idc field in the SPS used by the CVS the SEI message this field is applied to
and the value of the k is equal to 8.
num_non_zero_16_cus indicates the number of coding units whose width and height are 16 samples and
have non-zero transform coefficients values in the period complexity metrics is applied to. The length of
this field is decided by the value of the level_idc field in the SPS used by the CVS the SEI message this fiel
...
2023-05-17
ISO/IEC 23001-11:2023/AMDPRF Amd 1:2023(E)
ISO/IEC JTC1 JTC 1/SC 29
Secretariat: JISC
Date: 2024-05-09
Information technology — MPEG systems technologies —
—
Part 11:
Energy-efficient media consumption (green metadata) —
Amendment
AMENDMENT 1: Energy-efficient media consumption (green metadata)
for EVC
ISO #####-#:####(X)
Copyright notice
ThisPROOF
2 © ISO #### – All rights reserved
ISO/IEC 23001-11:2023/AMDPRF Amd 1:2023(E(en)
© ISO document is a working draft/IEC 2024
All rights reserved. Unless otherwise specified, or committee draft and is copyright-protected by ISO. While required in
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Requests for permission to reproduce this document for the purpose of selling it should be addressed as shown below or
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Published in Switzerland
© ISO/IEC 2023 2024 – All rights reserved
iii
ISO/IEC 23001-11:2023/AMDPRF Amd 1:2023(E(en)
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/directiveswww.iso.org/directives or
www.iec.ch/members_experts/refdocs).
Field Code Changed
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.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.www.iso.org/iso/foreword.html. In the IEC, see www.iec.ch/understanding-
Field Code Changed
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 14496 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.htmlwww.iso.org/members.html and
www.iec.ch/national-committees.
Field Code Changed
iv © ISO/IEC 2023 2024 – All rights reserved
iv
ISO/IEC 23001-11:2023/PRF Amd 1(en)
Information technology — MPEG systems technologies —
—
Part 11:
Energy-efficient media consumption (green metadata) —
Amendment
AMENDMENT 1: Energy-efficient media consumption (green
metadata) for EVC
6.2.1
Replace the following in subclause 6.2.1 (“General”):
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC or VVC bitstream to the decoder.
with:
With respect to the functional architecture in Figure 1, the green-metadata generator provides CMs that
indicate the picture-decoding complexity of an AVC, HEVC, VVC or EVC bitstream to the decoder.
6.2.2
Add the following at the end of the subclause 6.2.2 (“Syntax”):
The syntax for the EVC CMs is described in Table X.1 :
Table X.1 — Syntax for the HEVC CMs
period_type u(8)
if (profile_idc == 0) {
if (period_type = = 0 || period_type == 2) {
num_non_zero_4_cus uk(v)
num_non_zero_8_cus uk(v)
num_non_zero_16_cus uk(v)
num_non_zero_32_cus uk(v)
num_non_zero_64_cus uk(v)
portion_fractional_prediction_sample u(8)
} else if (period_type = = 1 || period_type == 3) {
num_count u(16)
for (t=0; t
© ISO/IEC 2023 2024 – All rights reserved
ISO/IEC 23001-11:2023/PRF Amd 1(en)
num_non_zero_4_cus [t] uk(v)
num _non_zero_8_cus [t] uk(v)
num _non_zero_16_cus [t] uk(v)
num _non_zero_32_cus [t] uk(v)
num _non_zero_64_cus [t] uk(v)
portion_fractional_prediction_sample [t] u(8)
}
}
else if (profile_idc ==1) {
if (period_type = = 0 || period_type == 2) {
num_non_zero_samples uk(v)
num_affine_samples uk(v)
num_dmvr_samples uk(v)
num_alf_samples uk(v)
num_deblocking_filter_samples uk(v)
num_htdf_samples uk(v)
} else if (period_type = = 1 || period_type == 3) {
num_count u(8)
for (t=0; t
num_non_zero_samples [t] uk(v)
num__samples [t] uk(v)
num_dmvr_samples [t] uk(v)
num_alf_samples [t] uk(v)
num_deblocking_filter_samples [t] uk(v )
num_htdf_samples [t] uk(v )
}
}
}
6.2.4.4
Add the following after the end ofnew subclause after subclause 6.2.4.3 (“VVC semantics”):
6.2.4.4 EVC Semantics
6.2.4.4.1 General
As EVC Baseline profile and Main profile share almost no tools and the methods used for partition of the
pictures are not same, the profile the CVS conforming to is used to decide the set of syntax elements to describe
the complexity metrics to be applied to each CVS. In addition, As the largest size of picture is indicated by the
level the CVS is conformed to, the length of the syntax elements indicating the number of pixels and coding
2 © ISO/IEC 2023 2024 – All rights reserved
ISO/IEC 23001-11:2023/PRF Amd 1(en)
units are decided by the level. In addition, the width and height of the coding units are also considered when
the length of the syntax elements indicating the number of coding units for the CVS conforming to the baseline
profile is decided.
6.2.4.4.2 Variable length syntax element for EVC Semantics
The maximum number of pixels and coding units depend on the size of the picture the complexity metric is
applied to. As the largest size of picture is indicated by the level the CVS is conformed to the length of the
syntax elements indicating the number of pixels and coding units are decided by the levels. In addition, the
width and height of the coding units are also considered when the length of the syntax elements indicating the
number of coding units for the CVS conforming to the baseline profile as the width and height of the coding
units get larger than the maximum number of coding units get smaller.
– uk(v): the field is unsigned integer and the length is decided by the value of the level_idc field in the SPS used
by the CVS this SEI message is applied to and the value of k assigned to each field based on the size of the units
counted. The length of the field according to each value of both level_idc and k is shown in the Table X.2.
Table X.2 — length of uk(v)
level value of length of the field
level_idc
k==1 k==4 k==8 k==16 k==32 k==64
1 30 16 16 16 8 8 8
2 60 24 16 16 16 8 8
2.1 63 24 16 16 16 8 8
3 90 24 16 16 16 16 8
3.1 93 24 16 16 16 16 8
4 120 24 24 16 16 16 16
4.1 123 24 24 16 16 16 16
5 150 24 24 24 16 16 16
5.1 153 24 24 24 16 16 16
5.2 156 24 24 24 16 16 16
6 180 32 24 24 24 16 16
6.1 183 32 24 24 24 16 16
6.2 186 32 24 24 24 16 16
6.2.4.4.2 Semantics of EVC CM
profile_idc indicates the profile of the CVS this SEI message is associated with.
period_type specifies the type of upcoming period over which the complexity metrics are applicable and is
defined in the Table X.3.
Table X.3 — specification of period_type for EVC
Value Description
0x0 complexity metrics are applicable to a single picture
© ISO/IEC 2023 2024 – All rights reserved
ISO/IEC 23001-11:2023/PRF Amd 1(en)
Value Description
0x1 complexity metrics are applicable over a specified number of pictures counted in decoding order
0x2 complexity metrics are applicable to a single slice
0x3 complexity metrics are applicable to a specified number of slices counted in decoding order
0x4-0xF user-defined
num_non_zero_4_cus indicates the number of coding units whose width and height are not greater than 4
samples and have non-zero transform coefficients values in the period complexity metrics is applied to. The
length of this field is decided by the value of the level_idc field in the SPS used by the CVS the SEI message this
field is applied to and the value of the k is equal to 4.
num_non_z
...
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