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IEC 61966-2-4
Edition 1.0 2021-07
INTERNATIONAL
STANDARD
colour
inside
AMENDMENT 2
Multimedia systems and equipment – Colour measurement and management –
Part 2-4: Colour management – Extended-gamut YCC colour space for video
applications – xvYCC
IEC 61966-2-4:2006-01/AMD2:2021-07(en)
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IEC 61966-2-4
Edition 1.0 2021-07
INTERNATIONAL
STANDARD
colour
inside
AMENDMENT 2
Multimedia systems and equipment – Colour measurement and management –
Part 2-4: Colour management – Extended-gamut YCC colour space for video
applications – xvYCC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.40 ISBN 978-2-8322-9952-4
– 2 – IEC 61966-2-4:2006/AMD 2:2021
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTIMEDIA SYSTEMS AND EQUIPMENT –
COLOUR MEASUREMENT AND MANAGEMENT –
Part 2-4: Colour management – Extended-gamut YCC
colour space for video applications – xvYCC
AMENDMENT 2
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 2 to IEC 61966-2-4:2006 has been prepared by technical area 2: Colour
measurement and management, of IEC technical committee 100: Multimedia systems and
equipment.
The text of this Amendment is based on the following documents:
Draft Report on voting
100/3535/CDV 100/3597/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
IEC 61966-2-4:2006/AMD 2:2021 – 3 –
© IEC 2021
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at /members_experts/refdocs. The main document types developed by IEC are
described in greater detail at /standardsdev/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
___________
– 4 – IEC 61966-2-4:2006/AMD 2:2021
© IEC 2021
Add, after Annex D, the following new Annex E:
Annex E
(informative)
xvYCCext – a method for encoding extended luminance signal
E.1 General
Recently, video standards for wide colour gamut and high dynamic range (HDR) colour space
encoding, such as ITU-R BT.2020 (UHDTV) and ITU-R BT.2100 (HDR), were established. In
contrast to the previous colour spaces, such as ITU-R BT.709 (high definition television) and
IEC 61966-2-4 (xvYCC), it is a very demanding challenge for the display industry to realize wide
colour gamut and/or high luminance displays. Therefore, recent mass produced displays for
consumer electronics covered only a certain range of wide colour gamuts an
...