Additional CMAF HEVC media profiles

Profils médias CMAF HEVC supplémentaires

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Status
Published
Publication Date
17-May-2021
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
03-Apr-2021
Completion Date
02-Apr-2021
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INTERNATIONAL ISO/IEC
STANDARD 23000-19
Second edition
2020-03
AMENDMENT 1
2021-05
Information technology — Multimedia
application format (MPEG-A) —
Part 19:
Common media application format
(CMAF) for segmented media
AMENDMENT 1: Additional CMAF HEVC
media profiles
Technologies de l'information — Format pour application multimédia
(MPEG-A) —
Partie 19: Format CMAF (Common Media Application Format) pour
médias segmentés
AMENDEMENT 1: Profils médias CMAF HEVC supplémentaires
Reference number
ISO/IEC 23000-19:2020/Amd.1:2021(E)
ISO/IEC 2021
---------------------- Page: 1 ----------------------
ISO/IEC 23000-19:2020/Amd.1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021

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
ii © ISO/IEC 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 23000-19:2020/Amd.1:2021(E)
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).

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent

rights. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents) or the IEC

list of patent declarations received (see https:// patents .iec .ch).

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 23000 series can be found on the ISO website 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 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/IEC 23000-19:2020/Amd.1:2021(E)
Information technology — Multimedia application format
(MPEG-A) —
Part 19:
Common media application format (CMAF) for segmented
media
AMENDMENT 1: Additional CMAF HEVC media profiles
Subclause 9.3.5.2
Replace the second paragraph with the following:

For NAL structured video, CTA 608/708 caption data (CTA-608-E, CTA-708-E) may be stored in SEI

messages in coded video sequences in CMAF fragments described as user data registered by Rec. ITU-T

Recommendation T.35, with SEI payloadType = 4 and the registered identifier in the field user_data_

registered_itu_t_t35. See ISO/IEC 23008-2 for supplemental enhancement information user data.

Annex B
Replace Clause B.1 with the following:
B.1 HEVC video CMAF tracks

This annex defines HEVC video tracks and specific CMAF media profiles with HEVC elementary

stream constraint sets. Applications that do not conform to the HEVC video track or any of these CMAF

media profiles can either specifiy their own HEVC video track definition or CMAF media profile or

both. Applications can also signal brand conformance to just a CMAF structural brand defined in this

document (e.g. 'cmfc' or 'cmf2').
HEVC tracks shall conform to 9.3, as additionally constrained in this annex.
Subclause B.2.4
Replace the first bullet item with the following:

— As specified in subclause 9.3.5.1, video captured or colour graded with characteristics other than

ITU-R Recommendation BT.709 defaults should include one or more SEI NALs with additional transfer

characteristics or colour volume information stored in the HEVCDecoderConfigurationRecord to enable

colour and dynamic range calibration during decoder and display initialization. This may include the

following for supplemental enhancement information (SEI) messages specified in ISO/IEC 23008-2:

Subclause B.3.3.2

Delete subclause B.3.3.2 (and renumber all subsequent subclauses in subclause B.3.3).

© ISO/IEC 2021 – All rights reserved 1
---------------------- Page: 4 ----------------------
ISO/IEC 23000-19:2020/Amd.1:2021(E)
Subclause B.3.3.3
Replace subclause B.3.3.3 with the following:
B.3.3.3 Video parameter sets (VPS)

Each HEVC video media sample in the CMAF track shall reference the VPS in the CMAF header sample

entry. VPS shall not change within CMAF tracks or between CMAF tracks in a CMAF switching set. A

CMAF HEVC track shall conform to ISO/IEC 23008-2 with the following additional constraints.

— The condition of the following fields shall not change throughout an HEVC elementary stream:

— general_profile_space
— general_profile_idc
— general_tier_flag
— general_level_idc
Clause B.5
Replace Clause B.5 as follows:
B.5   HEVC video CMAF media profiles and brands

A set of HEVC CMAF video media profiles are defined, together with an ISO BMFF brand and constraints

in Table B.1.

All pictures shall be encoded as coded frames and shall not be encoded as coded fields.

For a CMAF track to comply with one of the CMAF media profiles in Table B.1, it:
— shall have pre-determined values as follows:
— general_progressive_source_flag shall be set to 1;
— general_frame_only_constraint_flag shall be set to 1;
— general_interlaced_source_flag shall be set to 0;
— shall conform to 9.3 NAL structured video CMAF tracks;
— shall not exceed the tier, profile or level listed in the table;

— shall conform to the colour_primaries, transfer_characteristics and matrix_coefficients

values from the options listed in Table B.1 with the values defined in ISO/IEC 23008-2;

[12]

NOTE ISO/IEC 23091-2 may be consulted for additional details on the exact details of the values of

these parameters.

— shall not exceed the width, height or frame rate listed in Table B.1, even if the HEVC level would

permit higher values;
— shall not exceed the bit depth of the HEVC profile listed;
— should include the CMAF File Brand listed in its CMAF header.
2 © ISO/IEC 2021 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/IEC 23000-19:2020/Amd.1:2021(E)

NOTE CMAF tracks conform to more than one CMAF media profile if they meet the requirements for multiple

CMAF media profiles. For example, a CMAF track would conform to both the HHD8 and UHD8 media profiles if its

dimensions were within the constraints for the HHD8 profile (the UHD8 profile has higher dimension constraints

and codec level) and the colour_primaries, transfer_characteristics and matrix_coefficients are

values which are common to both profiles. HHD8 also conforms to UHD10 because an HEVC Main10 decoder will

decode the HEVC Mai
...

FINAL
ISO/IEC
AMENDMENT
DRAFT
23000-19:2020
FDAM 1
ISO/IEC JTC 1/SC 29
Information technology — Multimedia
Secretariat: JISC
application format (MPEG-A) —
Voting begins on:
2021-02-05
Part 19:
Voting terminates on:
Common media application format
2021-04-02
(CMAF) for segmented media
AMENDMENT 1: Additional CMAF HEVC
media profiles
Partie 19: Format CMAF (Common Media Application Format) pour
médias segmentés
AMENDEMENT 1: Titre manque
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC 23000-19:2020/FDAM 1:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO/IEC 2021
---------------------- Page: 1 ----------------------
ISO/IEC 23000-19:2020/FDAM 1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2021

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
ii © ISO/IEC 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/IEC 23000-19:2020/FDAM 1:2021(E)
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).

Attention is drawn to the possibility that some of the elements of this document may be the subject

of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent

rights. Details of any patent rights identified during the development of the document will be in the

Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents) or the IEC

list of patent declarations received (see https:// patents .iec .ch).

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.

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 23000 series can be found on the ISO website.

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.
© ISO/IEC 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/IEC 23000-19:2020/FDAM 1:2021(E)
Information technology — Multimedia application format
(MPEG-A) —
Part 19:
Common media application format (CMAF) for
segmented media
AMENDMENT 1: Additional CMAF HEVC media profiles
Subclause 9.3.5.2
Replace the second paragraph with the following:

For NAL structured video, CTA 608/708 caption data (CTA-608-E, CTA-708-E) may be stored in SEI

messages in coded video sequences in CMAF fragments described as user data registered by Rec. ITU-T

Recommendation T.35, with SEI payloadType = 4 and the registered identifier in the field user_data_

registered_itu_t_t35. See ISO/IEC 23008-2 for supplemental enhancement information user data.

Annex B
Replace Clause B.1 with the following:
B.1 HEVC video CMAF tracks

This annex defines HEVC video tracks and specific CMAF media profiles with HEVC elementary

stream constraint sets. Applications that do not conform to the HEVC video track or any of these CMAF

media profiles can either specifiy their own HEVC video track definition or CMAF media profile or

both. Applications can also signal brand conformance to just a CMAF structural brand defined in this

document (e.g. 'cmfc' or 'cmf2').
HEVC tracks shall conform to 9.3, as additionally constrained in this annex.
Subclause B.2.4
Replace the first bullet item with the following:

— As specified in subclause 9.3.5.1, video captured or colour graded with characteristics other than

ITU-R Recommendation BT.709 defaults should include one or more SEI NALs with additional transfer

characteristics or colour volume information stored in the HEVCDecoderConfigurationRecord to enable

colour and dynamic range calibration during decoder and display initialization. This may include the

following for supplemental enhancement information (SEI) messages specified in ISO/IEC 23008-2:

Subclause B.3.3.2

Delete subclause B.3.3.2 (and renumber all subsequent subclauses in subclause B.3.3).

© ISO/IEC 2021 – All rights reserved 1
---------------------- Page: 4 ----------------------
ISO/IEC 23000-19:2020/FDAM 1:2021(E)
Subclause B.3.3.3
Replace subclause B.3.3.3 with the following:
B.3.3.3 Video parameter sets (VPS)

Each HEVC video media sample in the CMAF track shall reference the VPS in the CMAF header sample

entry. VPS shall not change within CMAF tracks or between CMAF tracks in a CMAF switching set. A

CMAF HEVC track shall conform to ISO/IEC 23008-2 with the following additional constraints.

— The condition of the following fields shall not change throughout an HEVC elementary stream:

— general_profile_space
— general_profile_idc
— general_tier_flag
— general_level_idc
Clause B.5
Replace Clause B.5 as follows:
B.5   HEVC video CMAF media profiles and brands

A set of HEVC CMAF video media profiles are defined, together with an ISO BMFF brand and constraints

in Table B.1.

All pictures shall be encoded as coded frames and shall not be encoded as coded fields.

For a CMAF track to comply with one of the CMAF media profiles in Table B.1, it:
— shall have pre-determined values as follows:
— general_progressive_source_flag shall be set to 1;
— general_frame_only_constraint_flag shall be set to 1;
— general_interlaced_source_flag shall be set to 0;
— shall conform to 9.3 NAL structured video CMAF tracks;
— shall not exceed the tier, profile or level listed in the table;

— shall conform to the colour_primaries, transfer_characteristics and matrix_coefficients

values from the options listed in Table B.1 with the values defined in ISO/IEC 23008-2;

[12]

NOTE ISO/IEC 23091-2 may be consulted for additional details on the exact details of the values of

these parameters.

— shall not exceed the width, height or frame rate listed in Table B.1, even if the HEVC level would

permit higher values;
— shall not exceed the bit depth of the HEVC profile listed;
— should include the CMAF File Brand listed in its CMAF header.
2 © ISO/IEC 2021 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/IEC 23000-19:2020/FDAM 1:2021(E)

NOTE CMAF tracks conform to more than one CMAF media profile if they meet the requirements for multiple

CMAF media profiles. For example, a CMAF track would conform to both the HHD8 and UHD8 media profiles if its

dimensions were within the constraints for the HHD8 profile (the UHD8 profile has higher dimension constraints

and codec level) and the colour_primaries, transfer_characteristics and matrix_coeff

...

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