ISO/IEC 13818-1:2019/DAmd 2

Carriage of VVC in MPEG-2 Systems

Titre manque

Standards Content (sample)

DRAFT AMENDMENT
ISO/IEC 13818-1:2019 DAM 2
ISO/IEC JTC 1/SC 29 Secretariat: JISC
Voting begins on: Voting terminates on:
2020-10-07 2020-12-30
Information technology — Generic coding of moving
pictures and associated audio information —
Part 1:
Systems
AMENDMENT 2: Carriage of VVC in MPEG-2 Systems
Partie 1: Systèmes
AMENDEMENT 2: Titre manque
ICS: 35.040.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/IEC 13818-1:2019/DAM 2:2020(E)
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 SUPPORTING DOCUMENTATION. ISO/IEC 2020
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associated non-VCL NAL units of all temporal sub-layers associated to a contiguous range of TemporalId from

1 to a value equal to or smaller than sps_max_sub_layers_minus1 included in the referred sequence parameter

set, as specified in Rec. ITU-T H.26X | ISO/IEC 23090-3.
ISO/IEC 13818-1:2019/DAM 2:2020(E)

2.1.147 VVC temporal video subset: An VVC video sub-bitstream that contains all VCL NAL units and the

associated non-VCL NAL units of one or more temporal sub-layers, as specified in Rec. ITU-T H.26X |

ISO/IEC 23090-3, with each temporal sub-layer not being present in the corresponding VVC temporal video

sub-bitstream and TemporalId associated with each temporal sub-layer forming a contiguous range of values.

NOTE – According to the constraints for the transport of VVC specified in 2.23.1, each temporal sub-layer of a VVC video

stream is present either in the VVC temporal video sub-bitstream or in exactly one VVC temporal video subset which are

carried in a set of elementary streams that are associated by hierarchy descriptors. This prevents multiple inclusion of the

same temporal sub-layer and allows aggregation of the VVC temporal video sub-bitstream with associated VVC temporal

video subsets according to the hierarchy descriptors as specified in 2.23.3.

2.1.148 VVC highest temporal sub-layer representation: The sub-layer representation of the temporal sub-

layer with the highest value of TemporalId, as defined in Rec. ITU-T H.26X | ISO/IEC 23090-3, in the

associated VVC temporal video sub-bitstream or VVC temporal video subset.

2.1.149 VVC complete temporal representation: A sub-layer representation as defined in Rec. ITU-T H.26X |

ISO/IEC 23090-3 that contains all temporal sub-layers up to the temporal sub-layer with TemporalId equal to

sps_max_sub_layers_minus1+1 as included in the referred sequence parameter set, as specified in Rec. ITU-T

H.26X | ISO/IEC 23090-3.
In 2.4.2.7, replace the following 2 paragraphs.
Replace:

The delay of any data through the System Target Decoder buffers shall be less than or equal to one second

except for still picture video data, ISO/IEC 14496 and ISO/IEC 23008-2 streams. Specifically: td (j) – t(i) ≤ 1

second for all j, and all bytes i in access unit A (j).
with:

The delay of any data through the System Target Decoder buffers shall be less than or equal to one second

except for still picture video data, ISO/IEC 14496, and ISO/IEC 23008-2 and ISO/IEC 23090-3 streams.

Specifically: tdn(j) – t(i) ≤ 1 second for all j, and all bytes i in access unit An(j).

Replace:

For ISO/IEC 14496 and ISO/IEC 23008-2 streams, the delay is constrained by td (j) – t(i) ≤ 10 seconds for all j,

and all bytes i in access unit An(j).
with:

For ISO/IEC 14496, ISO/IEC 23008-2 and ISO/IEC 23090-3 streams, the delay is constrained by td (j) – t(i) ≤

10 seconds for all j, and all bytes i in access unit An(j).
After 2.4.2.15, add 2.4.2.16:
2.4.2.16, T-STD extensions for carriage of VVC

T-STD extensions and T-STD parameters for decoding of VVC video streams are defined in 2.23.2 and 2.23.3.

COPYRIGHT PROTECTED DOCUMENT

Program stream support including P-STD extensions and P-STD parameters are not specified for VVC video

© ISO/IEC 2020
streams.

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

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Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
Information technology — Generic coding of moving
pictures and associated audio information —
Part 1:
Systems
AMENDMENT 2: Carriage of VVC in MPEG‐2 Systems
In 1.2.2, add the following references:
– Recommendation ITU-T H.26X, Versatile video coding

– ISO/IEC 23090-3, Information technology – Coded Representation of Immersive Media – Part 3:

Versatile video coding
After 2.1.136, add the following definitions

2.1.137 VVC video stream: A byte stream as specified in Rec. ITU‐T H. 26X | ISO/IEC 23090‐3 Annex B.

2.1.138 VVC access unit: An access unit as defined in Rec. ITU‐T H. 26X | ISO/IEC 23090‐3 with the

constraints specified in section 2.23.1.

2.1.139 VVC 24-hour picture (system): An VVC access unit with a presentation time that is more than

24 hours in the future. For the purpose of this definition, VVC access unit n has a presentation time that

is more than 24 hours in the future if the difference between the initial arrival time tai(n) and the DPB

output time to,dpb(n) is more than 24 hours.
2.1.140 VVC slice: A slice as specified in Rec. ITU‐T H. 26X | ISO/IEC 23090‐3.

2.1.141 VVC subpicture: A subpicture as specified in Rec. ITU‐T H. 26X | ISO/IEC 23090‐3.

2.1.142 VVC tile of slices: One or more consecutive VVC slices which form the coded representation of

a tile as defined in Rec. ITU‐T H.26X | ISO/IEC 23090‐3.

2.1.143 VVC still picture (system): A VVC still picture consists of a VVC access unit containing an IDR

picture preceded by VPS, SPS and PPS NAL units, as defined in Rec. ITU‐T H.26X | ISO/IEC 23090‐3, that

carry sufficient information to correctly decode this IDR picture. Preceding a VVC still picture, there

shall be another VVC still picture or an End of Sequence NAL unit terminating a preceding coded video

sequence as defined in Rec. ITU‐T H.26X | ISO/IEC 23090‐3.

2.1.144 VVC video sequence (system): coded video sequence as defined in Rec. ITU‐T H.26X | ISO/IEC

23090‐3.

2.1.145 VVC video sub-bitstream: A subset of the NAL units of a VVC video stream in their original

order.
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ISO/IEC 13818-1:2019/DAM 2:2020(E)

2.1.146 VVC temporal video sub-bitstream: An VVC video sub‐bitstream that contains all VCL NAL

units and associated non‐VCL NAL units of the temporal sub‐layer, as specified in Rec. ITU‐T H.26X |

ISO/IEC 23090‐3, associated to TemporalId equal to 0 and which may additionally contain all VCL NAL

units and associated non‐VCL NAL units of all temporal sub‐layers associated to a contiguous range of

TemporalId from 1 to a value equal to or smaller than sps_max_sub_layers_minus1 included in the

referred sequence parameter set, as specified in Rec. ITU‐T H.26X | ISO/IEC 23090‐3.

2.1.147 VVC temporal video subset: An VVC video sub‐bitstream that contains all VCL NAL units and

the associated non‐VCL NAL units of one or more temporal sub‐layers, as specified in Rec. ITU‐T H.26X |

ISO/IEC 23090‐3, with each temporal sub‐layer not being present in the corresponding VVC temporal

video sub‐bitstream and TemporalId associated with each temporal sub‐layer forming a contiguous

range of values.

NOTE – According to the constraints for the transport of VVC specified in 2.23.1, each temporal sub‐

layer of a VVC video stream is present either in the VVC temporal video sub‐bitstream or in exactly one

VVC temporal video subset which are carried in a set of elementary streams that are associated by

hierarchy descriptors. This prevents multiple inclusion of the same temporal sub‐layer and allows

aggregation of the VVC temporal video sub‐bitstream with associated VVC temporal video subsets

according to the hierarchy descriptors as specified in 2.23.3.

2.1.148 VVC highest temporal sub-layer representation: The sub‐layer representation of the

temporal sub‐layer with the highest value of TemporalId, as defined in Rec. ITU‐T H.26X | ISO/IEC

23090‐3, in the associated VVC temporal video sub‐bitstream or VVC temporal video subset.

2.1.149 VVC complete temporal representation: A sub‐layer representation as defined in Rec. ITU‐T

H.26X | ISO/IEC 23090‐3 that contains all temporal sub‐layers up to the temporal sub‐layer with

TemporalId equal to sps_max_sub_layers_minus1+1 as included in the referred sequence parameter set,

as specified in Rec. ITU‐T H.26X | ISO/IEC 23090‐3.
In 2.4.2.7, replace the following 2 paragraphs.
Replace:

The delay of any data through the System Target Decoder buffers shall be less than or equal to one

second except for still picture video data, ISO/IEC 14496 and ISO/IEC 23008‐2 streams. Specifically:

td(j) – t(i) ≤ 1 second for all j, and all bytes i in access unit A(j).
n n
with:

The delay of any data through the System Target Decoder buffers shall be less than or equal to one

second except for still picture video data, ISO/IEC 14496, and ISO/IEC 23008‐2 and ISO/IEC 23090‐3

streams. Specifically: td(j) – t(i) ≤ 1 second for all j, and all bytes i in access unit A(j).

n n
Replace:

For ISO/IEC 14496 and ISO/IEC 23008‐2 streams, the delay is constrained by td(j) – t(i) ≤ 10 seconds

for all j, and all bytes i in access unit A(j).
with:

For ISO/IEC 14496, ISO/IEC 23008‐2 and ISO/IEC 23090‐3 streams, the delay is constrained by td(j) –

t(i) ≤ 10 seconds for all j, and all bytes i in access unit A(j).
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
After 2.4.2.15, add 2.4.2.16:
2.4.2.16, T-STD extensions for carriage of VVC

T‐STD extensions and T‐STD parameters for decoding of VVC video streams are defined in 2.23.2 and

2.23.3. Program stream support including P‐STD extensions and P‐STD parameters are not specified for

VVC video streams.

In 2.4.3.5, in the section specifying the discontinuity_indicator, at the end of the bulleted list introduced by

“For the purpose of this clause, an elementary stream access point is defined as follows”, add:

• VVC video streams or VVC temporal video sub‐bitstreams – The first byte of a VVC access

unit. The DPS, VPS, SPS and PPS parameter sets, as defined in Rec. ITU‐T H.26X | ISO/IEC

23090‐3, referenced in this and all subsequent VVC access units in the VVC video sequence

shall be provided after this access point in the byte stream and prior to their activation.

In 2.4.3.5, in the section specifying the elementary_stream_priority_indicator, add:

In the case of VVC video streams or VVC temporal video sub‐bitstreams or VVC temporal video subsets,

this field may be set to '1' only if the payload contains one or more bytes from a slice with slice_type set

to 2. A value of '0' indicates that the payload has the same priority as all other packets which do not

have this bit set to '1'.
In 2.4.3.7, in Table 2-22, Stream_id assignments, replace the following line:

1110 xxxx Rec. ITU-T H.262 | ISO/IEC 13818-2, ISO/IEC 11172-2, ISO/IEC 14496-2, Rec. ITU-T H.264 | ISO/IEC 14496-10 or

Rec. ITU-T H.265 | ISO/IEC 23008-2 video stream number xxxx
With

1110 xxxx Rec. ITU-T H.262 | ISO/IEC 13818-2, ISO/IEC 11172-2, ISO/IEC 14496-2, Rec. ITU-T H.264 | ISO/IEC 14496-10,

Rec. ITU-T H.265 | ISO/IEC 23008-2 or Rec. ITU-T H.26X | ISO/IEC 23090-3 video stream number xxxx

In 2.4.3.7, in the section specifying the PTS (presentation time stamp), add:

For VVC video streams, VVC temporal video sub‐bitstreams and VVC temporal video subsets, if a PTS is

present in the PES packet header, it shall refer to the first VVC access unit that commences in this PES

packet. To achieve consistency between the STD model and the HRD model defined in Annex C of Rec.

ITU‐T H.26X | ISO/IEC 23090‐3, for each VVC access unit the PTS value in the STD shall, within the

accuracy of their respective clocks, indicate the same instant in time as the nominal DPB output time in

the HRD, as defined in Annex C of Rec. ITU‐T H.26X | ISO/IEC 23090‐3.
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
In 2.4.3.7, in the section specifying the DTS (decoding time stamp), add:

For VVC video streams, VVC temporal video sub‐bitstreams and VVC temporal video subsets, if a DTS is

present in the PES packet header, it shall refer to the first VVC access unit that commences in this PES

packet. To achieve consistency between the STD model and the HRD model defined in Annex C of Rec.

ITU‐T H.26X | ISO/IEC 23090‐3, for each VVC access unit the DTS value in the STD shall, within the

accuracy of their respective clocks, indicate the same instant in time as the nominal CPB removal time tr

in the HRD, as defined in Annex C of Rec. ITU‐T H.26X | ISO/IEC 23090‐3.
In 2.4.4.9, in Table 2-34, Stream type assignments, replace the following line:
0x32-0x7E ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Reserved
with:

0x32 VVC video stream or an VVC temporal video sub-bitstream conforming to one or more profiles defined in Annex

A of Rec. ITU-T H.26X | ISO/IEC 23090-3

0x33 VVC temporal video subset of an VVC video stream conforming to one or more profiles defined in Annex A of

Rec. ITU-T H.26X | ISO/IEC 23090-3
0x34-0x7E ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Reserved
In 2.6.1, in Table 2-45, replace the following line:
57-62 n/a n/a Rec. ITU-T H.222.0 | ISO/IEC 13818-1 Reserved
With:
57 X n/a VVC video descriptor
58-62 n/a n/a Rec. ITU-T H.222.0 | ISO/IEC 13818-1 Reserved
In 2.6.6, in Table 2-50, replace the description for value 15:
Table 2-50 – Hierarchy_type field values
Value Description
15 Base layer or MVC base view sub-bitstream or AVC video sub-
bitstream of MVC or HEVC temporal video sub-bitstream or HEVC
base sub-partition or Base layer of MVCD base view sub-bitstream or
AVC video sub-bitstream of MVCD or VVC temporal video sub-
bitstream.
In 2.6.11, add the following immediately after Table 2-56:

Table 2‐xx describes the alignment type for VVC when the data_alignment_indicator in the PES packet

header has a value of '1'.
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
Table 2-xx – VVC video stream alignment values
Alignment type Description
00 Reserved
01 VVC access unit
02 VVC slice
03 VVC access unit or slice
04 VVC tile of slices
05 VVC access unit or tile of slices
06 VVC slice or tile of slices
07 VVC access unit or slice or tile of slices
08 VVC subpicture
09 VVC access unit or subpicture
10 VVC slice or subpicture
11 VVC subpicture or tile of slices
12 VVC access unit or slice or subpicture
13 VVC access unit or subpicture or tile of slices
14 VVC slice or subpicture or tile of slices
15 VVC access unit or slice or subpicture or tile of slices
16-255 Reserved
In 2.6.88, in Table 2-107, add the following extension_descriptor_tag for VVC
timing_and_HRD_descriptor():
Table 2-107 – Extension descriptor
Syntax No. of bits Mnemonic
Extension_descriptor () {
else if ( extension_descriptor_tag == 0x14) {
VVC_timing_and_HRD_descriptor()
In 2.6.89, before Table 2-108, add:

VVC_timing_and_HRD_descriptor() – This structure is defined in 2.6.127 and 2.6.128.

In 2.6.89, in Table 2-108, replace the following line:
0x14-0xFF n/a n/a Rec. ITU-T H.222.0 | ISO/IEC 13818-1 Reserved
with
0x14 X n/a VVC_timing_and_HRD_descriptor()
0x15-0xFF n/a n/a Rec. ITU-T H.222.0 | ISO/IEC 13818-1 Reserved
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
After 2.6.126 add 2.6.127 to 2.6.130:
2.6.127 VVC video descriptor

For a VVC video stream, the VVC video descriptor provides basic information for identifying coding

parameters, such as profile and level parameters, of that VVC video stream. For an VVC temporal video

sub‐bitstream or a VVC temporal video subset, the VVC video descriptor provides information such as

the associated VVC highest temporal sub‐layer representation contained in the elementary stream to

which it applies.
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
Table 2-129bis – VVC video descriptor
Syntax No. Of bits Mnemonic
VVC_descriptor() {
descriptor_tag 8 uimsbf
descriptor_length 8 uimsbf
profile_idc 7 uimsbf
tier_flag 1 bslbf
num_sub_profiles 8 uimsbf
for ( i=0; i sub_profile_idc[ i ] 32 uimsbf
progressive_source_flag 1 bslbf
interlaced_source_flag 1 bslbf
non_packed_constraint_flag 1 bslbf
frame_only_constraint_flag 1 bslbf
no_mixed_nalu_types_in_pic_constraint_flag 1 bslbf
reserved_zero_3bits 3 bslbf
level_idc 8 uimsbf
temporal_layer_subset_flag 1 bslbf
VVC_still_present_flag 1 bslbf
VVC_24hr_picture_present_flag 1 bslbf
reserved 5 bslbf
HDR_WCG_idc 2 uimsbf
reserved 2 bslbf
video_properties_tag 4 uimsbf
if ( temporal_layer_subset_flag == '1') {
reserved 5 bslbf
temporal_id_min 3 uimsbf
reserved 5 bslbf
temporal_id_max 3 uimsbf
2.6.128 Semantic definition of fields in VVC video descriptor

profile_idc, tier_flag, num_sub_profiles, sub_profile_idc[ i ], progressive_source_flag,

interlaced_source_flag, non_packed_constraint_flag, frame_only_constraint_flag,

reserved_zero_Xbits – These fields shall be coded according to the semantics defined in Rec. ITU‐T

H.26X | ISO/IEC 23090‐3 for general_profile_idc, general_tier_flag, num_sub_profiles,

general_sub_profile_idc[i], general_progressive_source_flag, general_interlaced_source_flag,

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ISO/IEC 13818-1:2019/DAM 2:2020(E)

general_non_packed_constraint_flag, general_frame_only_constraint_flag, further bits in

general_constraint_info(), respectively, for the corresponding VVC video stream or VVC complete

temporal representation. When the corresponding VVC video stream or VVC complete temporal

representation contains a DPS, the values of these fields shall be coded exactly the same as the

corresponding fields in the DPS.

no_mixed_nalu_types_in_pic_constraint_flag – This 1‐bit flag, when set to '1', indicates that it is a

requirement of bitstream conformance that mixed_nalu_types_in_pic_flag shall be equal to 0. If

no_mixed_nalu_types_in_pic_constraint_flag is set to '0', no such a constraint is imposed.

level_idc – When the VVC video descriptor applies to a VVC video stream or to a VVC complete

temporal representation, this field shall be coded according to the semantics defined in Rec. ITU‐T

H.26X | ISO/IEC 23090‐3 for general_level_idc, for the corresponding VVC video stream or VVC

complete temporal representation. When the VVC video descriptor applies to an VVC temporal video

sub‐bitstream or VVC temporal video subset of which the corresponding VVC highest temporal sub‐

layer representation is not an VVC complete temporal representation, this field shall be coded according

to semantics defined in Rec. ITU‐T H.26X | ISO/IEC 23090‐3 for sub_layer_level_idc, for the

corresponding VVC highest temporal sub‐layer representation. When the corresponding VVC video

stream or VVC complete temporal representation contains a DPS, the values of this field shall be coded

exactly the same as the corresponding fields in the DPS.

When the VVC video descriptor applies to a VVC video stream or to a VVC complete temporal

representation, the entire VVC video stream or VVC complete temporal representation to which the VVC

video descriptor is associated shall conform to the information signaled by these fields. When the VVC

video descriptor applies to an VVC temporal video sub‐bitstream or VVC temporal video subset of

which the corresponding VVC highest temporal sub‐layer representation is not an VVC complete

temporal representation, the entire VVC highest temporal sub‐layer representation to which the VVC

video descriptor is associated shall conform to the information signalled by these fields.

NOTE – In one or more sequences in the VVC video stream the level may be lower than the level

signalled in the VVC video descriptor, while also a profile may occur that is a subset of the profile

signalled in the VVC video descriptor. However, in the entire VVC video stream, only subsets of the

entire bitstream syntax shall be used that are included in the profile signalled in the VVC video

descriptor, if present. When the VVC video stream contains a DPS NAL unit, the profile‐tier‐level

indication signals the profile and level information to which all sequences in the VVC video stream

conforms. When not, if the sequence parameter sets in an VVC video stream signal different profiles,

and no additional constraints are signalled, then the stream may need examination to determine which

profile, if any, the entire stream conforms to.

temporal_layer_subset_flag – This 1‐bit flag, when set to '1', indicates that the syntax elements

describing a subset of temporal layers are included in this descriptor. This field shall be set to 1 for VVC

temporal video subsets and for VVC temporal video sub‐bitstreams. When set to ‘0’, the syntax elements

temporal_id_min and temporal_id_max are not included in this descriptor.

VVC_still_present_flag – This 1‐bit field, when set to '1', indicates that the VVC video stream or the VVC

highest temporal sub‐layer representation may include VVC still pictures. When set to '0', then the

associated VVC video stream shall not contain VVC still pictures.

NOTE – According to Rec. ITU‐T H.26X | ISO/IEC 23090‐3, IDR pictures are always associated to a

TemporalId value equal to 0, Consequently, if the VVC video descriptor applies to a VVC temporal video

subset, VVC still pictures can only be present in the associated VVC temporal video sub‐bitstream.

VVC_24_hour_picture_present_flag – This 1‐bit flag, when set to '1', indicates that the associated VVC

video stream or the VVC highest temporal sub‐layer representation may contain VVC 24‐hour pictures.

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ISO/IEC 13818-1:2019/DAM 2:2020(E)

For the definition of an VVC 24‐hour picture, see 2.1.X. If this flag is set to '0', the associated VVC video

stream shall not contain any VVC 24‐hour picture.

HDR_WCG_idc – This 2‐bit field indicates the presence or absence of high dynamic range (HDR) and/or

wide color gamut (WCG) video components in the associated PID according to Table 2‐112. This field

shall not be set to 2 unless bit_depth_luma_minus8 as defined in Rec. ITU‐T H.265 | ISO/IEC 23008‐2 in

the associated video is greater than or equal to 2. This field also shall not be set to 1 or 2 unless

bit_depth_chroma_minus8 as defined in [VVC Spec] in the associated video is greater than or equal to 2.

Table 2-129ter – Semantics of HDR_WGC_idc
HDR_WCG_idc Description

0 SDR, i.e., video is based on the Rec. ITU-R BT.1886 reference EOTF with a color gamut that is

contained within Rec. ITU-R BT.709 with a Rec. ITU-R BT.709 container (see Note 1)

1 WCG only, i.e., video color gamut in a Rec ITU-R BT.2020 container that exceeds Rec. ITU-R

BT.709 (see Note 2)
2 Both HDR and WCG are to be indicated in the stream (see Note 3)
3 No indication is made regarding HDR/WCG or SDR characteristics of the stream

NOTE 1 – An example where it would be desirable to set HDR_WCG_idc to 0 would be when the

colour_description_present_flag, as defined in Rec. ITU-T H.SEI | ISO/IEC 23002-7, is set to '0', with colour_primaries and

transfer_characteristics not present in the video stream.

NOTE 2 – An example where it would be desirable to set HDR_WCG_idc to 1 would be when colour_primaries as defined in

Rec. ITU-T H.SEI | ISO/IEC 23002-7 (which refers to the ColourPrimaries parameter in Rec. ITU-T H.273 | ISO/IEC 23091-2) is

equal to 9 to indicate Rec. ITU-R BT.2020.

NOTE 3 – An example where it would be desirable to set HDR_WCG_idc to 2 would be when transfer_characteristics as

defined in Rec. ITU-T H.SEI | ISO/IEC 23002-7 (which refers to the TransferCharacteristics parameter in Rec. ITU-T H.273 |

ISO/IEC 23091-2) is equal to 16 to indicate BT.2100 PQ EOTF or equal to 18 to indicate BT.2100 HLG EOTF, and when

colour_primaries as defined in ISO/IEC 23002-7 is equal to 9 to indicate Rec. ITU-R BT.2020.

video_properties_tag – This 4‐bit field is used to indicate specific widely used video property CICP

combinations as indicated by [23091‐4/H‐Series Supp 19] for SDR, WCG, or HDR/WCG streams

depending on the value of HDR_WCG_idc. When HDR_WCG_idc is equal to 0, Table 2‐129quater applies.

When HDR_WCG_idc is equal to 1, Table 2‐129quinquies applies. When HDR_WCG_idc is equal to 2,

Table 2‐129sexies applies. When HDR_WCG_idc is equal to 3, Table 2‐129septies applies.

Table 2-129quater – SDR widely used video property combinations
video_properties_tag CICP Values - System Identifier
[ColourPrimaries, TransferCharacteristics,
MatrixCoefficients, VideoFullRangeFlag]
0 Video property CICP combination not specified or unknown
1 [1,1,1,0]- BT709_YCC
2 [1,1,0,0]- BT709_RGB
3 [6,6,6,0]- BT601_525
4 [5,6,5,0]- BT601_625
5 [1,1,0,1]- FR709_RGB
6-15 Reserved
© ISO 2020 – All rights reserved 9
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
Table 2-129quinquies – WCG widely used video property combinations
CICP Values - System Identifier
video_properties_tag
[ColourPrimaries, TransferCharacteristics,
MatrixCoefficients, VideoFullRangeFlag]
0 Video property CICP combination not specified or unknown
1 [9,14,9,0]- BT2020_YCC_NCL
2 [9,14,0,0]- BT2020_RGB
3 [9,14,0,1]- FR2020_RGB
4 [12,1,6,1]- FRP3D65_YCC
5-15 Reserved
Table 2-129sexies – HDR/WCG widely used video property combinations
CICP Values - System Identifier
video_properties_tag
[ColourPrimaries, TransferCharacteristics,
MatrixCoefficients, VideoFullRangeFlag]
0 Video property CICP combination not specified or unknown
1 [9,16,9,0]- BT2100_PQ_YCC
2 [9,18,9,0]- BT2100_HLG_YCC
3 [9,16,14,0]- BT2100_PQ_ICTCP
4 [9,16,0,0]- BT2100_PQ_RGB
5 [9,18,0,0]- BT2100_HLG_RGB
6-15 Reserved
Table 2-129septies – No Indication
CICP Values - System Identifier
video_properties_tag
[ColourPrimaries, TransferCharacteristics,
MatrixCoefficients, VideoFullRangeFlag]
0 Video property CICP combination not specified or unknown
1-15 Reserved or private

temporal_id_min – This 3‐bit field indicates the minimum value of the TemporalId, as defined in Rec.

ITU‐T H.26X | ISO/IEC 23090‐3, of all VVC access units in the associated elementary stream.

temporal_id_max – This 3‐bit field indicates the maximum value of the TemporalId, as defined in Rec.

ITU‐T H.26X | ISO/IEC 23090‐3, of all VVC access units in the associated elementary stream.

NOTE – These values indicate maximum and minimum values, but they do not guarantee that all

temporal layers are present at all times, because the number of temporal layers may change eg. when

splicing occurs. However, if the temporal level goes beyond the range given by min and max values, a

new descriptor with appropriate values needs to be inserted.
10 © ISO 2020 – All rights reserved
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ISO/IEC 13818-1:2019/DAM 2:2020(E)
2.6.129 VVC timing and HRD descriptor

For a VVC video stream, a VVC temporal video sub‐bitstream or a VVC temporal video subset, the VVC

timing and HRD descriptor provides timing and HRD parameters, as defined in Annex C of Rec. ITU‐T

H.26X | ISO/IEC 23090‐3, for the associated VVC video stream or the VVC highest temporal sub‐layer

representation thereof, respectively.
Table 2-129octies – VVC timing and HRD descriptor
Syntax No. Of bits Mnemonic
VVC_timing_and_HRD_descriptor() {
hrd_management_valid_flag 1 bslbf
reserved 6 bslbf
picture_and_timing_info_present_flag 1 bslbf
if (picture_and_timing_info_present_flag == '1') {
90kHz_flag 1 bslbf
reserved 7 bslbf
if (90kHz_flag = = '0') {
N 32 uimsbf
K 32 uimsbf
}
num_units_in_tick 32 uimsbf
2.6.130 Semantic definition of fields in VVC timing and HRD descriptor

hrd_management_valid_flag – This 1‐bit flag is only defined for use in transport streams. When the

VVC timing and HRD descriptor is associated to a VVC video stream or to a VVC highest temporal sub‐

layer representation carried in a transport stream, then the following applies.

If the hrd_management_valid_flag is set to '1', then Buffering Period SEI and Picture T

...