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Copyright
©
2025
,
Society
of
Motion
Picture
and
Television
Engineers
.
All
rights
reserved.
No
part
of
this
material
may
be
reproduced,
by
any
means
whatsoever,
without
the
prior
written
permission
of
the
Society
of
Motion
Picture
and
Television
Engineers.
Warning:
This
document
is
an
unpublished
work
under
development
and
shall
not
be
referred
to
as
a
SMPTE
Standard,
Recommended
Practice,
or
Engineering
Guideline.
It
is
distributed
for
review
and
comment;
distribution
does
not
constitute
publication.
Recipients
of
this
document
are
strongly
encouraged
to
submit,
with
their
comments,
notification
of
any
relevant
patent
rights
of
which
they
are
aware
and
to
provide
supporting
documentation.
Foreword
🔗
The
Society
of
Motion
Picture
and
Television
Engineers
(SMPTE)
is
an
internationally-recognized
standards
developing
organization.
Headquartered
and
incorporated
in
the
United
States
of
America,
SMPTE
has
members
in
over
80
countries
on
six
continents.
SMPTE’s
Engineering
Documents,
including
Standards,
Recommended
Practices,
and
Engineering
Guidelines,
are
prepared
by
SMPTE’s
Technology
Committees.
Participation
in
these
Committees
is
open
to
all
with
a
bona
fide
interest
in
their
work.
SMPTE
cooperates
closely
with
other
standards-developing
organizations,
including
ISO,
IEC
and
ITU.
SMPTE
Engineering
Documents
are
drafted
in
accordance
with
the
rules
given
in
its
Standards
Operations
Manual.
For
more
information,
please
visit
www.smpte.org
.
At
the
time
of
publication
no
notice
had
been
received
by
SMPTE
claiming
patent
rights
essential
to
the
implementation
of
this
Engineering
Document.
However,
attention
is
drawn
to
the
possibility
that
some
of
the
elements
of
this
document
may
be
the
subject
of
patent
rights.
SMPTE
shall
not
be
held
responsible
for
identifying
any
or
all
such
patent
rights.
This
document
was
prepared
by
Technology
Committee
XX.
2
Conformance
🔗
Normative
text
is
text
that
describes
elements
of
the
design
that
are
indispensable
or
contains
the
conformance
language
keywords:
"shall",
"should",
or
"may".
Informative
text
is
text
that
is
potentially
helpful
to
the
user,
but
not
indispensable,
and
can
be
removed,
changed,
or
added
editorially
without
affecting
interoperability.
Informative
text
does
not
contain
any
conformance
keywords.
All
text
in
this
document
is,
by
default,
normative,
except:
the
Introduction,
any
clause
explicitly
labeled
as
"Informative"
or
individual
paragraphs
that
start
with
"Note:"
The
keywords
"shall"
and
"shall
not"
indicate
requirements
strictly
to
be
followed
in
order
to
conform
to
the
document
and
from
which
no
deviation
is
permitted.
The
keywords,
"should"
and
"should
not"
indicate
that,
among
several
possibilities,
one
is
recommended
as
particularly
suitable,
without
mentioning
or
excluding
others;
or
that
a
certain
course
of
action
is
preferred
but
not
necessarily
required;
or
that
(in
the
negative
form)
a
certain
possibility
or
course
of
action
is
deprecated
but
not
prohibited.
The
keywords
"may"
and
"need
not"
indicate
courses
of
action
permissible
within
the
limits
of
the
document.
The
keyword
"reserved"
indicates
a
provision
that
is
not
defined
at
this
time,
shall
not
be
used,
and
may
be
defined
in
the
future.
The
keyword
"forbidden"
indicates
"reserved"
and
in
addition
indicates
that
the
provision
will
never
be
defined
in
the
future.
A
conformant
implementation
according
to
this
document
is
one
that
includes
all
mandatory
provisions
("shall")
and,
if
implemented,
all
recommended
provisions
("should")
as
described.
A
conformant
implementation
need
not
implement
optional
provisions
("may")
and
need
not
implement
them
as
described.
Unless
otherwise
specified,
the
order
of
precedence
of
the
types
of
normative
information
in
this
document
shall
be
as
follows:
Normative
prose
shall
be
the
authoritative
definition;
tables
shall
be
next;
then
formal
languages;
then
figures;
and
then
any
other
language
forms.
3
Normative
references
🔗
There
are
no
normative
references
in
this
document.
4
Terms
and
definitions
🔗
No
terms
and
definitions
are
listed
in
this
document.