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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
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© ISO/IEC 2024 – All rights reserved
ii
ISO/IEC 23001-11:2023/Amd. 1:2024(en)
Foreword
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Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
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© 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
...