ISO/IEC 23008-2:2017/Amd 1:2018

INTERNATIONAL ISO/IEC
STANDARD 23008-2
Third edition
2017-10-15
AMENDMENT 1
2018-03
Information technology — High
efficiency coding and media delivery
in heterogeneous environments —
Part 2:
High efficiency video coding
AMENDMENT 1: Additional colour
representation code point
Technologies de l'information — Codage à haute efficacité et livraison
des medias dans des environnements hétérogènes —
Partie 2: Codage vidéo à haute efficacité
AMENDEMENT 1: Point de codage de représentation de couleur
supplémentaire
Reference number
ISO/IEC 23008-2:2017/Amd.1:2018(E)
©
ISO/IEC 2018

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ISO/IEC 23008-2:2017/Amd.1:2018(E)

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© ISO/IEC 2018
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ii © ISO/IEC 2018 – All rights reserved

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ISO/IEC 23008-2:2017/Amd.1:2018(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. In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1.
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information in collaboration
with ITU-T. A technically aligned twin text is published as ITU-T H.265.
A list of all parts in the ISO/IEC 23008 series can be found on the ISO website.
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ISO/IEC 23008-2:2017/Amd.1:2018(E)
Information technology — High efficiency coding and
media delivery in heterogeneous environments —
Part 2:
High efficiency video coding
AMENDMENT 1: Additional colour representation code point
Page 19, Clause 4: Abbreviated terms
Add the following additional items (interspersed with the existing items in alphabetical order):
FCC Federal Communications Commission (of the United States)
NTSC National Television System Committee (of the United States)
SMPTE Society of Motion Picture and Television Engineers

Page 446, Annex E
In E.3.1, replace the semantics of video_full_range_flag, colour_description_present_flag, colour_
primaries, transfer_characteristics, and matrix_coeffs, including Tables E.3, E.4, and E.5, with the
following.
video_full_range_flag indicates the black level and range of the luma and chroma signals as derived
from E′ , E′ , and E′ or E′ , E′ , and E′ real-valued component signals.
Y PB PR R G B
When the video_full_range_flag syntax element is not present, the value of video_full_range_flag is
inferred to be equal to 0.
colour_description_present_flag equal to 1 specifies that colour_primaries, transfer_characteristics,
and matrix_coeffs are present. colour_description_present_flag equal to 0 specifies that colour_
primaries, transfer_characteristics, and matrix_coeffs are not present.
colour_primaries indicates the chromaticity coordinates of the source primaries as specified in
Table E.3 in terms of the CIE 1931 definition of x and y as specified in ISO 11664-1.
When the colour_primaries syntax element is not present, the value of colour_primaries is inferred to
be equal to 2 (the chromaticity is unspecified or is determined by the application). Values of colour_
primaries that are identified as reserved in Table E.3 are reserved for future use by ITU-T | ISO/IEC and
shall not be present in bitstreams conforming to this version of this document. Decoders shall interpret
reserved values of colour_primaries as equivalent to the value 2.
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ISO/IEC 23008-2:2017/Amd.1:2018(E)

Table E.3 — Colour primaries interpretation using the colour_primaries syntax element
Value Primaries Informative remark
0 Reserved For future use by ITU-T | ISO/IEC
1 primary x y Rec. ITU-R BT.709–6
green 0.300 0.600 Rec. ITU-R BT.1361–0 conventional colour
gamut system and extended colour gamut
blue 0.150 0.060
system (historical)
red 0.640 0.330
IEC 61966-2-1 sRGB or sYCC
white D65 0.312 7 0.329 0
IEC 61966-2-4
SMPTE RP 177 (1993) Annex B
2 Unspecified Image characteristics are unknown or
are determined by the application.
3 Reserved For future use by ITU-T | ISO/IEC
4 primary x y Rec. ITU-R BT.470–6 System M (historical)
green 0.21 0.71 NTSC Recommendation for transmission
standards for colour television (1953)
blue 0.14 0.08
FCC Title 47 Code of Federal Regulations
red 0.67 0.33
(2003) 73.682 (a) (20)
white C 0.310 0.316
5 primary x y Rec. ITU-R BT.470–6 System B, G
(historical)
green 0.29 0.60
Rec. ITU-R BT.601–7 625
blue 0.15 0.06
Rec. ITU-R BT.1358–0 625 (historical)
red 0.64 0.33
Rec. ITU-R BT.1700–0 625 PAL
white D65 0.312 7 0.329 0
and 625 SECAM
6 primary x y Rec. ITU-R BT.601–7 525
green 0.310 0.595 Rec. ITU-R BT.1358–1 525 or 625
(historical)
blue 0.155 0.070
Rec. ITU-R BT.1700–0 NTSC
red 0.630 0.340
SMPTE ST 170 (2004)
white D65 0.312 7 0.329 0
(functionally the same as the value 7)
7 primary x y SMPTE ST 240 (1999, historical)
green 0.310 0.595 (functionally the same as the value 6)
blue 0.155 0.070
red 0.630 0.340
white D65 0.312 7 0.329 0
8 primary x y Generic film (colour filters using Illuminant C)
green 0.243 0.692 (Wratten 58)
blue 0.145 0.049 (Wratten 47)
red 0.681 0.319 (Wratten 25)
white C 0.310 0.316
9 primary x y Rec. ITU-R BT.2020–2
green 0.170 0.797 Rec. ITU-R BT.2100–1
blue 0.131 0.046
red 0.708 0.292
white D65 0.312 7 0.329 0
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ISO/IEC 23008-2:2017/Amd.1:2018(E)

Table E.3 (continued)
Value Primaries Informative remark
10 primary x y SMPTE ST 428-1 (2006)
green (Y) 0.0 1.0 (CIE 1931 XYZ)
blue (Z) 0.0 0.0
red (X) 1.0 0.0
centre white 1 ÷ 3 1 ÷ 3
11 primary x y SMPTE RP 431-2 (2011)
green 0.265 0.690
blue 0.150 0.060
red 0.680 0.320
white 0.314 0.351
12 primary x y SMPTE EG 432-1 (2010)
green 0.265 0.690
blue 0.150 0.060
red 0.680 0.320
white D65 0.312 7 0.329 0
13…21 Reserved For future use by ITU-T | ISO/IEC
22 primary x y EBU Tech. 3213-E (1975)
green 0.295 0.605
blue 0.155 0.077
red 0.630 0.340
white D65 0.312 7 0.329 0
23…255 Reserved For future use by ITU-T | ISO/IEC
transfer_characteristics, as specified in Table E.4, either indicates the reference opto-electronic
transfer characteristic function of the source picture as a function of a source input linear optical
intensity L with a nominal real-valued range of 0 to 1 or indicates the inverse of the reference electro-
c
optical transfer characteristic function as a function of an output linear optical intensity L with a
o
nominal real-valued range of 0 to 1. For interpretation of entries in Table E.4 that are expressed in terms
of multiple curve segments parameterized by the variable α over a region bounded by the variable β or
by the variables β and γ, the values of α and β are defined to be the positive constants necessary for the
curve segments that meet at the value β to have continuity of value and continuity of slope at the value
β, and the value of γ, when applicable, is defined to be the positive constant necessary for the associated
curve segments to meet at the value γ. For example, for transfer_characteristics equal to 1, 6, 11, 14, or
15, α has the value 1 + 5.5 * β = 1.099 296 826 809 442. and β has the value 0.018 053 968 510 807.
When the transfer_characteristics syntax element is not present, the value of transfer_characteristics
is inferred to be equal to 2 (the transfer characteristics are unspecified or are determined by the
application). Values of transfer_characteristics that are identified as reserved in Table E.4 are reserved
for future use by ITU-T | ISO/IEC and shall not be present in bitstreams conforming to this version of
this document. Decoders shall interpret reserved values of transfer_characteristics as equivalent to the
value 2.
NOTE 5 As indicated in Table E.4, some values of transfer_characteristics are defined in terms of a reference
opto-electronic transfer characteristic function and others are defined in terms of a reference electro-optical
transfer characteristic function, according to the convention that has been applied in other documents. In the
cases of Rec. ITU-R BT.709-6 and Rec. ITU-R BT.2020-2 (which could be indicated by transfer_characteristics
equal to 1, 6, 14, or 15), although the value is defined in terms of a reference opto-electronic transfer characteristic
function, a suggested corresponding reference electro-optical transfer characteristic function for flat panel
displays used in HDTV studio production has been specified in Rec. ITU-R BT.1886-0.
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ISO/IEC 23008-2:2017/Amd.1:2018(E)

Table E.4 — Transfer characteristics interpretation using
the transfer_characteristics syntax element
Value Transfer characteristics Informative remark
0 Reserved For future use by ITU-T | ISO/IEC
0.45
1 V = α * L − (α − 1) for 1 >= L >= β Rec. ITU-R BT.709–6
c c
V = 4.500 * L for β > L >= 0 Rec. ITU-R BT.1361–0 conventional
c c
colour gamut system (historical)
(functionally the same as the values
6, 14, and 15)
2 Unspecified Image characteristics are
unknown or are determined
by the application.
3 Reserved For future use by ITU-T | ISO/IEC
4 Assumed display gamma 2.2 Rec. ITU-R BT.470–6 System M
(historical)
NTSC Recommendation for
transmission standards for
colour television (1953)
FCC Title 47 Code of Federal Regula-
tions (2003) 73.682 (a) (20)
5 Assumed display gamma 2.8 Rec. ITU-R BT.470–6 System B, G
(historical)
Rec. ITU-R BT.1700–0 625 PAL and
625 SECAM
0.45
6 V = α * L − (α − 1) for 1 >= L >= β Rec. ITU-R BT.601–7 525 or 625
c c
V = 4.500 * L for β > L >= 0 Rec. ITU-R BT.1358–1 525 or 625
c c
(historical)
Rec. ITU-R BT.1700–0 NTSC
SMPTE ST 170 (2004)
(functionally the same as the values
1, 14, and 15)
0.45
7 V = α * L − (α − 1) for 1 >= L >= β SMPTE ST 240 (1999, historical)
c c
V = 4.0 * L for β > L >= 0
c c
8 V = L for all values of L Linear transfer characteristics
c c
9 V = 1.0 + Log10(L ) ÷ 2 for 1 >= L >= 0.01 Logarithmic transfer characteristic
c c
(100:1 range)
V = 0.0 for 0.01 > L >= 0
c
10 V = 1.0 + Log10( L ) ÷ 2.5 for 1 >= L >= Sqrt(10) ÷ 1 000 Logarithmic transfer characteristic
c c
(100 * Sqrt( 10 ) : 1 range)
V = 0.0 for Sqrt(10) ÷ 1 000 > L >= 0
c
0.45
11 V = α * L − (α − 1) for L >= β IEC 61966-2-4
c c
V = 4.500 * L for β > L >− β
c c
0.45
V = −α * (−L ) + (α − 1) for −β >= L
c c
0.45
12 V = α * L − (α − 1) for 1,33 > L > = β Rec. ITU-R BT.1361–0 extended
c c
colour gamut system (historical)
V = 4.500 * L for β > L >= − γ
c c
0.45
V = −[α * (−4 * L ) − (α − 1)] ÷ 4 for −γ > L >= −0.25
c c
(1 ÷ 2.4)
13 V = α * L − (α − 1) for 1 > = L >= β IEC 61966-2-1 sRGB or sYCC
c c
V = 12.92 * L for β > L >= 0
c c
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ISO/IEC 23008-2:2017/Amd.1:2018(E)

Table E.4 (continued)
Value Transfer characteristics Informative remark
0.45
14 V = α * L − (α − 1) for 1 >= L > = β Rec. ITU-R BT.2020–2
c c
(functionally the same as the values
V = 4.500 * L for β > L >= 0
c c
1, 6, and 15)
0.45
15 V = α * L − (α − 1) for 1 >= L > = β Rec. ITU-R BT.2020–2
c c
(functionally the same as the values
V = 4.500 * L for β > L >= 0
c c
1, 6, and 14)
n n m
16 V = ((c + c * L ) ÷ (1 + c * L ))  for all values of L SMPTE ST 2084 (2014) for 10, 12,
1 2 o 3 o o
14, and 16-bit systems
c = c − c + 1 = 3 424 ÷ 4 096 = 0.835 937 5
1 3 2
Rec. ITU-R BT.2100–1 perceptual
c = 32 * 2 413 ÷ 4 096 = 18.851 562 5
2
quantization (PQ) system
c = 32 * 2 392 ÷ 4 096 = 18.687 5
3
m = 128 * 2 523 ÷ 4 096 = 78.843 75
n = 0.25 * 2 610 ÷ 4 096 = 0.159 301 757 812 5
for which L equal to 1 for peak white is ordinarily intended to
o
2
correspond to a reference output luminance level of 10 000 cd/m
(1 ÷ 2.6)
17 V = (48 * L ÷ 52.37) for all values of L SMPTE ST 428-1 (2006)
o o
for which L equal to 1 for peak white is ordinarily intended to
o
2
correspond to a reference output luminance level of 48 cd/m
18 V = a * Ln(12 * L − b) + c     for 1 >= L > 1 ÷ 12 Association of Radio Industries and
c c
Businesses (ARIB) STD-B67
0.5
V = Sqrt(3) * L           for 1 ÷ 12 >= L >= 0
c c
Rec. ITU-R BT.2100–1 hybrid
a = 0.178 832 77, b = 0.284 668 92, c = 0.559 910 73
log-gamma (HLG) system
19.255 Reserved For future use by ITU-T | ISO/IEC
NOTE 6 For transfer_characteristics equal to 18, the formulae given in Table E.4 are normalized for a
source input linear optical intensity L with a nominal real-valued range of 0 to 1. An alternative scaling that
c
is mathematically equivalent is used in ARIB STD-B67 with the source input linear optical intensity having a
nominal real-valued range of 0 to 12.
matrix_coeffs describes the matrix coefficients used i
...