ISO/IEC 23001-11:2023/Amd 2:2025
(Amendment)Information technology — MPEG systems technologies — Part 11: Energy-efficient media consumption (green metadata) — Amendment 2: Energy-efficient media consumption for new display power reduction metadata
Information technology — MPEG systems technologies — Part 11: Energy-efficient media consumption (green metadata) — Amendment 2: Energy-efficient media consumption for new display power reduction metadata
Technologies de l'information — Technologies des systèmes MPEG — Partie 11: Consommation des supports éconergétiques (métadonnées vertes) — Amendement 2: Consommation des supports écoénergétiques pour les nouvelles métadonnées de réduction de la puissance d'affichage
General Information
Relations
Standards Content (Sample)
International
Standard
ISO/IEC 23001-11
Third edition
Information technology — MPEG
2023-02
systems technologies —
AMENDMENT 2
Part 11:
2025-09
Energy-efficient media consumption
(green metadata)
AMENDMENT 2: Energy-efficient
media consumption for new display
power reduction metadata
Technologies de l'information — Technologies des systèmes MPEG —
Partie 11: Consommation des supports éconergétiques
(métadonnées vertes)
AMENDEMENT 2: Consommation des supports écoénergétiques
pour les nouvelles métadonnées de réduction de la puissance
d'affichage
Reference number
ISO/IEC 23001-11:2023/Amd. 2:2025(en) © ISO/IEC 2025
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
© ISO/IEC 2025
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ii
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
Foreword
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Commission) form the specialized system for worldwide standardization. National bodies that are
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in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
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IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
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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 23001 series can be found on the ISO and IEC websites.
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© ISO/IEC 2025 – All rights reserved
iii
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
Information technology — MPEG systems technologies —
Part 11:
Energy-efficient media consumption (green metadata)
AMENDMENT 2: Energy-efficient media consumption for new
display power reduction metadata
Introduction
Replace the following:
The metadata for energy-efficient decoding specifies two sets of information: complexity metrics (CM)
metadata and decoding operation reduction request (DOR-Req) metadata. A decoder uses CM metadata
to vary operating frequency and thus reduce decoder power consumption. In a point-to-point video
conferencing application, the remote encoder uses the DOR-Req metadata to modify the decoding complexity
of the bitstream and thus reduce local decoder power consumption.
The metadata for energy-efficient encoding specifies quality metrics that are used by a decoder to reduce
the quality loss from low-power encoding.
The metadata for energy-efficient presentation specifies RGB-component statistics and quality levels. A
presentation subsystem uses this metadata to reduce power by adjusting display parameters, based on the
statistics, to provide a desired quality level from those provided in the metadata.
with:
The metadata for energy-efficient decoding specifies two sets of information: complexity metrics (CM)
metadata and decoding operation reduction request (DOR-Req) and response (DOR-Resp) metadata. A
decoder uses CM metadata to vary operating frequency and thus reduce decoder power consumption. In a
point-to-point video conferencing application, the remote encoder uses the DOR-Req metadata to modify the
decoding complexity of the bitstream and thus reduce local decoder power consumption. The remote encoder
uses the DOR-Resp metadata to acknowledge for the request and indicate how it has decided to answer.
The metadata for energy-efficient encoding specifies quality metrics that are used by a decoder to reduce
the quality loss from low-power encoding.
The metadata for energy-efficient presentation specifies Attenuation Map Information (AMI) metadata,
RGB-component statistics and quality levels. A presentation subsystem uses this metadata to reduce power
by modifying the content based on attenuation maps and/or adjusting display parameters, based on the
statistics, to provide a desired quality level from those provided in the metadata.
In a point-to-point video conferencing application, two types of interactive signalling mechanisms exist to
reduce the energy consumption of the display. In a first type, a decoder can use the display attenuation
map power reduction request (DAMPR-Req) message to request for transmission of display attenuation
maps, that will be applied to the decoded content, to adapt the amount of light emitted by the display, and
thus reduce the display energy consumption. The remote encoder uses the display attenuation map power
reduction response (DAMPR-Resp) message, to acknowledge reception of the request and to indicate how it
decides to answer. In a second type, a decoder can use the display power reduction attenuated video request
(DPRAV-Req), to request the remote encoder to generate a given display attenuation map and apply it on the
base video to generate an attenuated video. This attenuated video is then encoded and transmitted up to the
© ISO/IEC 2025 – All rights reserved
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
decoder. The remote encoder uses the display power reduction attenuated video response (DPRAV-Resp)
message, to acknowledge reception of the request and to indicate how it decides to answer.
3.2
Add the following in alphabetical order:
AMI attenuation map information
DA display adaptation
DAMPR-Req display attenuation map power reduction request
DAMPR-Resp display attenuation map power reduction response
DPRAV-Req display power reduction attenuated video request
DPRAV-Resp display power reduction attenuated video response
picAMI attenuation map sample values coded in auxiliary pictures of type AUX_ALPHA
6.2.2, Table 1
Replace the existing title of Table 1 with the following title:
Table 1 — Syntax for the AVC CMs
6.2.2, Table 2
Replace the existing title of Table 2 with the following title:
Table 2 — Syntax for the HEVC CMs
6.2.2, Table 3
Replace the existing title of Table 3 with the following title:
Table 3 — Syntax for the VVC CMs
6.3.2, Table 11
Replace the existing table with the following table:
Table 11 — Syntax for interactive signalling for remote decoder-power reduction
Descriptor
dec_pow_reduction_type u(2)
if (dec_pow_reduction_type = = 0) {
dec_ops_reduction_req s(6)
else if (dec_pow_reduction_type = = 1) {
disable_loop_filters u(1)
disable_bi_prediction u(1)
disable_intra_in_B u(1)
disable_fracpel_filtering u(1)
user_defined_req u(2)
}
else if (dec_pow_reduction_type = = 2) {
© ISO/IEC 2025 – All rights reserved
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
TTabablele 1 111 ((ccoonnttiinnueuedd))
Descriptor
pic_width_in_luma_samples u(14)
pic_height_in_luma_samples u(14)
u(10)
frames_per_second
}
else if (dec_pow_reduction_type = = 3) {
dec_pow_reduction_extension_type u(2)
if (dec_pow_reduction_extension_type == 0) {
nb_dec_pow_reduction_type_req u(2)
for (i = 0 ; i < nb_dec_pow_reduction_type_req; i++){
dec_pow_reduction_type_req_id[ i ] u(2)
}
}
}
Add the following at the end of subclause 6.3.2:
The transmitter then uses the message format described in Table 12 to acknowledge the request of the
decoding operation reduction from the receiver:
Table 12 — Syntax for interactive signalling from the transmitter to acknowledge remote decoder-
power reduction
Descriptor
dec_pow_reduction_type_resp u(2)
if (dec_pow_reduction_type_resp = = 0) {
dec_ops_reduction_resp s(6)
else if (dec_pow_reduction_type_resp = = 1) {
disabled_loop_filters_resp u(1)
disabled_bi_prediction_resp u(1)
disabled_intra_in_B_resp u(1)
disabled_fracpel_filtering_resp u(1)
user_defined_resp u(2)
}
else if (dec_pow_reduction_type_resp = = 2) {
pic_width_in_luma_samples_resp u(14)
pic_height_in_luma_samples_resp u(14)
frames_per_second_resp u(10)
}
else if (dec_pow_reduction_type_resp = = 3) {
dec_pow_reduction_extension_type_resp u(2)
if (dec_pow_reduction_extension_type_resp == 0) {
nb_dec_pow_reduction_type_resp u(2)
if (nb_dec_pow_reduction_type_resp == 0) {
pic_width_in_luma_samples_resp
pic_height_in_luma_samples_resp
frames_per_second_resp
}
else {
for (i = 0 ; i < nb_dec_pow_reduction_type_resp; i++){
© ISO/IEC 2025 – All rights reserved
ISO/IEC 23001-11:2023/Amd. 2:2025(en)
TTabablele 1 122 ((ccoonnttiinnueuedd))
Descriptor
dec_pow_reduction_type_resp_id[ i ] u(2)
}
}
}
}
6.3.3
Replace the following text:
The transmitter in each device sends a decoding operation reduction request (DOR-Req) message to the
attention of the remote encoder. In a first mode (dec_pow_reduction_type equal to 0), this message requests
the remote encoder to adjust its encoding parameters so that ideally, when the local decoder decodes
the bitstream, the power saving of the local decoder matches the power saving implied by the DOR-Req
message. In a second mode (dec_pow_reduction_type equal to 1), this message requests the remote encoder
to disable coding tools so that, when the local decoder decodes the bitstream, the power consumption of
the local decoder is decreased. In a third mode (dec_pow_reduction_type equal to 2), this message requests
the remote encoder to adjust the picture resolution and video frame rate so that, when the local decoder
decodes the bitstream, the power consumption of the local decoder is decreased.
with:
The transmitter in each device sends a decoding operation reduction request (DOR-Req) message to the
attention of the remote encoder. In a first mode (dec_pow_reduction_type equal to 0), this message requests
the remote encoder to adjust its encoding parameters so that ideally, when the local decoder decodes
the bitstream, the power saving of the local decoder matches the power saving implied by the DOR-Req
message. In a second mode (dec_pow_reduction_type equal to 1), this message requests the remote encoder
to disable coding tools so that, when the local decoder decodes the bitstream, the power consumption of
the local decoder is decreased. In a third mode (dec_pow_reduction_type equal to 2), this message requests
the remote encoder to adjust the picture resolution and video frame rate so that, when the local decoder
decodes the bitstream, the power consumption of the local decoder is decreased. In a fourth mode (dec_pow_
reduction_type equal to 3), this message indicates that some other extended decoding operation reduction
types are requested by the remote encoder.
In a first extension of the decoding operation reduction types, the message requests a global or partial
cancellation of the last decoding operation reduction requests of specific types at the transmitter side. In
this case, the encoder stops the corresponding changes previously enabled in its coding process. In case a
global cancellation is requested, the transmitter goes back to the nominal mode, where no change in local
decoding operations compared to the start of the video session is applied.
In response to a decoding operation reduction request (DOR-Req), the remote encoder sends a decoding
operation reduction response (DOR-Resp) message to the remote decoder. In a first mode (dec_pow_
reduction_type_resp equal to 0), it acknowledges that it has proceeded to an adjustment of its encoding
parameters to save power while decoding. In a second mode (dec_pow_reduction_type_resp equal to 1),
this message acknowledges that the encoder has disabled some coding tools. The list of coding tools it has
accepted to disable is then sent in the message. In a third mode (dec_pow_reduction_type_resp equal to 2),
it acknowledges that it has adjusted the picture resolution and video frame rate. In a fourth mode (dec_
pow_reduction_type_resp equal to 3), this message indicates that some other extended decoding operation
reduction types were acknowledged.
In a first extension of the decoding operation reduction types, the remote encoder acknowledges th
...
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