**DRAFT**
Timed
Text
Working
Group
Charter
The
mission
of
the
Timed
Text
Working
Group
,
part
of
the
Video
in
the
Web
Activity,
is
to
develop
W3C
Recommendations
for
media
online
captioning
by
developing
and
maintaining
new
versions
of
the
Timed
Text
Markup
Language
(TTML)
and
WebVTT
(Web
Video
Text
Tracks)
based
on
implementation
experience
and
interoperability
feedback,
and
the
creation
of
semantic
mappings
between
those
languages.
Join
the
Timed
Text
Working
Group
.
End
date
|
30
November
2015
|
Confidentiality
|
Proceedings
are
public
|
Initial
Chairs
|
??
??,
Nigel
Megitt,
David
Singer
|
Initial
Team
Contact
(FTE
%:
20)
|
Philippe
Le
Hégaret,
Thierry
Michel,
Mark
Sadecki
@@tocheck
Michel
|
Usual
Meeting
Schedule
|
Teleconferences:
Weekly
for
TTML,
and
as
needed
for
WebVTT
Face-to-face:
1-2
per
year
|
Scope
This
group
is
chartered
to
develop
formats
used
for
the
representation
of
streamable
text
synchronized
with
other
timed
media,
like
audio
and
video.
Such
formats
MUST
be
useable
for
online
media
captioning,
should
be
useable
for
described
video
(aka
video/audio
description)
and
should
address
the
media
accessibility
user
requirements
.
Such
formats
MAY
also
be
useable
for
broadcast
production
and
exchange.
exchange
and
MUST
be
useable
in
the
context
of
HTML.
The
Group
will:
-
Publish
a
Recommendation
for
a
new
Timed
Text
Markup
Language
(TTML)
2.0
specification
to
include
the
Note
described
above.
2
specification.
In
the
process
of
producing
this
new
revision,
the
Group
WILL:
-
Address
any
issues
found
during
the
development
of
a
Simple
Delivery
Profile
for
Closed
Captions.
-
Consider
for
adoption
features
from
existing
formats,
such
as
CEA608
or
CEA708,
or
developed
by
groups
such
as
SMPTE,
DECE
and
EBU
-
Produce
other
technical
reports
(Notes)
on
aspects
of
TTML
processing
as
appropriate.
-
Address
v.next
issues
deferred
during
last
call.
Seek
backward
compatibility
with
TTML
1.0
1
whenever
possible.
-
Will
provide
a
mapping
with
HTML5/CSS3,
including
describing
TTML
intermediate
synchronic
document
as
HTML5,
HTML5
document
fragment,
and
understanding
how
the
presentation
syntax
and
semantics
relate
to
CSS3.
-
As
required,
produce
a
test
suite
for
the
above.
-
Produce
an
implementation
report,
based
on
the
test
suite
above.
-
Publish
a
Recommendation
for
the
WebVTT
language,
in
particular
the
parts
that
cover
the
syntax,
semantics,
and
rendering
of
subtitles,
delivery
of
metadata,
captions,
chapter
markers,
and
textual
audio
descriptions
for
speech
synthesis.
The
Group
is
expected
to
produce
annual
updates
for
the
Recommendation
with
previously
unspecified
features
from
browser
vendors.
In
the
process
of
producing
the
specification,
the
Group
WILL:
-
Address
any
issues
found
in
WebVTT:
The
Web
Video
Text
Tracks
Format
produced
by
the
Web
Media
Text
Tracks
Community
Group.
Some
may
be
deferred
to
v.next.
future
versions.
-
Include
all
features
that
have
at
least
two
independent
and
interoperable
implementations
-
Solidify
the
set
of
features
through
the
creation
of
a
WebVTT
test
suite
-
Consider
the
adoption
of
new
features
-
Establish
a
semantic
mapping
between
TTML
and
WebVTT
in
order
to
facilitate
browser
implementation
and
market
adoption.
-
Maintain
a
simple
constrained
profile
for
delivery
of
closed
captions
for
video
content
("Simple
Delivery
Profile
for
Closed
Captions").
Captions")
for
TTML.
-
Maintain
TTML
1.
-
Publish
a
text
and
an
image
profile
of
the
Timed
Text
Markup
Language
(TTML)
appropriate
for
worldwide
subtitling
applications,
including
dialog
language
translation,
content
description,
captions
for
deaf
and
hard
of
hearing,
etc.,
using
TTML
Text
and
Image
Profiles
for
Internet
Media
Subtitles
and
Captions
as
basis
and
subset.
basis.
-
Produce
a
technical
report
(Note)
on
the
application
of
TTML
in
live
production
and
streaming
such
as
for
video
content.
-
Produce
a
technical
report
(Note)
on
the
convertion
of
CEA-608/708
data
streams
to
WebVTT
.
The
new
work
is
expected
to
be
broadly
available
and
should
be
provided
on
a
timely
fashion.
This
charter
features
a
tightly
constrained
scope
designed
to
ensure
that
the
Working
Group
will
meet
its
schedule
and
objectives.
Success
Criteria
The
Working
Group
is
expected
to
demonstrate
at
least
two
interoperable
implementations
of
all
available
features
in
the
recommendations.
Deliverables
Other
Deliverables
The
Working
Group
will
update
the
test
suites
intended
to
promote
implementations
of
the
above
specification(s)
and
to
assess
interoperability
between
these
implementations.
The
Group
will
also
produce
an
implementation
report
for
each
deliverable.
Milestones
Milestones
Note:
The
group
will
document
significant
changes
from
this
initial
schedule
on
the
group
home
page.
|
Deliverable
|
LC
|
Note
|
CR
|
PER
|
PR
|
Rec
|
WebVTT
|
January
2014
|
N/A
|
March
2014
|
N/A
|
June
September
2014
|
August
November
2014
|
TTML
Live
Update
Production
and
Streaming
Note
|
March
2014
|
June
2014
|
N/A
|
N/A
|
N/A
|
N/A
|
Timed
Text
Markup
Language
(TTML)
2.0
2
|
April
2014
|
N/A
|
July
2014
|
N/A
|
October
December
2014
|
December
2014
February
2015
|
Text
and
Image
Profiles
for
Internet
Media
Subtitles
and
Captions
|
April
2014
|
N/A
|
July
2014
|
N/A
|
October
December
2014
|
December
February
2015
|
TTML/WebVTT
mapping
|
N/A
|
September
2014
|
N/A
|
N/A
|
N/A
|
N/A
|
Dependencies
As
part
of
the
Video
in
the
Web
Activity,
the
Timed
Text
Working
Group
will
be
represented
in
the
Hypertext
Coordination
Group.
Dependencies
with
W3C
Groups
-
HTML
Working
Group
-
The
HTML
specification
is
intended
to
provide
a
semantic-level
markup
language
and
associated
semantic-level
scripting
APIs
for
authoring
accessible
pages
on
the
Web
ranging
from
static
documents
to
dynamic
applications.
It
includes
media
elements
to
present
video,
audio
and
video
text
tracks
and
their
associated
APIs.
-
CSS
Working
Group
-
The
work
of
the
Working
Group
coordinates
with
this
group
on
presentation
and
layout
issues.
-
Protocols
and
Formats
Working
Group
-
The
PFWG
looks
at
the
formal
Web
technologies
(protocols,
formats,
etc.)
from
an
accessibility
perspective.
-
Web
Content
Accessibility
Guidelines
Working
Group
-
This
Group
aims
to
make
Web
content
accessible
for
people
with
disabilities.
Liaisons
with
W3C
Groups
-
Scalable
Vector
Graphics
(SVG)
Working
Group
-
The
Scalable
Vector
Graphics
language
allows
authors
to
describe
two-dimensional
vector
and
mixed
vector/raster
graphics.
It
includes
support
for
multimedia:
audio,
video
and
animation.
-
Web
and
TV
Interest
Group
-
The
Web
and
TV
Interest
Group
provides
a
forum
for
Web
and
TV
technical
discussions,
review
existing
work,
as
well
as
the
relationship
between
services
on
the
Web
and
TV
services,
and
identifies
requirements
and
potential
solutions
to
ensure
that
the
Web
will
function
well
with
TV.
-
Web
Media
Text
Tracks
Community
Group
-
This
group
developed
the
first
Community
report
for
the
WebVTT
format
and
will
continue
to
explore
new
features.
-
Internationalization
(i18n)
Working
Group
-
The
mission
of
the
Internationalization
Working
Group
is
to
enable
universal
access
to
the
World
Wide
Web
and
provide
reviews
of
W3C
technologies
for
internationalization
issues.
External
Groups
-
ISO/IEC
JTC-1/SC-29
WG
11
Moving
Picture
Experts
Group
(MPEG)
-
This
group
is
developing
standards
for
coded
representation
of
digital
audio
and
video,
including
MPEG-4.
-
Society
of
Motion
Picture
and
Television
Engineers
(SMPTE)
-
This
organization
was
founded
to
advance
theory
and
development
in
the
motion
imaging
field.
SMPTE
produced
extensions
to
TTML
1.0
1
that
are
part
of
SMPTE-TT.
-
European
Broadcasting
Union
(EBU)
-
EBU
is
a
confederation
of
national
broadcasting
organisations,
facilitate
exchange
of
audiovisual
content.
This
Group
has
developed
an
XML
-based
format
for
use
in
subtitling
production
and
exchange,
based
on
TTML
1.0.
1.
-
Digital
Entertainment
Content
Ecosystem
(DECE)
-
DECE
is
a
consortium
chartered
to
develop
standards
for
the
digital
distribution
of
premium
content.
-
DVB
Project:
Technical
Module
(DVB-TM)
-
The
DVB
Project
develops
specifications
for
digital
television
systems,
which
are
turned
into
standards
by
international
standards
bodies
such
as
ETSI
or
CENELEC.
It
provides
a
conduit
to
other
relevant
standardisation
activities
including
MPEG
for
the
purpose
of
meeting
the
objectives
of
the
DVB
Project.
Participation
To
be
successful,
the
Timed
Text
Working
Group
is
expected
to
have
5
or
more
active
participants
for
its
duration.
Effective
participation
to
Timed
Text
Working
Group
is
expected
to
consume
one
half-day
per
week
for
each
participant;
one
day
per
week
for
editors.
The
Timed
Text
Working
Group
will
allocate
also
the
necessary
resources
for
building
Test
Suites
for
each
specification.
Participants
are
reminded
of
the
Good
Standing
requirements
of
the
W3C
Process.
Communication
This
group
primarily
conducts
its
work
on
the
public
mailing
list
public-tt@w3.org
(
archive
).
A
Member-only
mailing
list,
member-tt@w3.org
(
archive
)
is
available
for
administrative
purposes
such
as
liaison
with
Member-only
Working
Groups.
Information
about
the
group
(deliverables,
participants,
face-to-face
meetings,
teleconferences,
etc.)
is
available
from
the
Timed
Text
Working
Group
home
page
.
Decision
Policy
As
explained
in
the
Process
Document
(
section
3.3
),
this
group
will
seek
to
make
decisions
when
there
is
consensus.
When
the
Chair
puts
a
question
and
observes
dissent,
after
due
consideration
of
different
opinions,
the
Chair
should
record
a
decision
(possibly
after
a
formal
vote)
and
any
objections,
and
move
on.
This
charter
is
written
in
accordance
with
Section
3.4,
Votes
of
the
W3C
Process
Document
and
includes
no
voting
procedures
beyond
what
the
Process
Document
requires.
Patent
Policy
This
Working
Group
operates
under
the
W3C
Patent
Policy
(5
February
2004
Version).
To
promote
the
widest
adoption
of
Web
standards,
W3C
seeks
to
issue
Recommendations
that
can
be
implemented,
according
to
this
policy,
on
a
Royalty-Free
basis.
For
more
information
about
disclosure
obligations
for
this
group,
please
see
the
W3C
Patent
Policy
Implementation
.
About
this
Charter
This
charter
for
the
Timed
Text
Working
Group
has
been
created
according
to
section
6.2
of
the
Process
Document
.
In
the
event
of
a
conflict
between
this
document
or
the
provisions
of
any
charter
and
the
W3C
Process,
the
W3C
Process
shall
take
precedence.
The
previous
charter
is
also
available.
Philippe
Le
Hégaret,
and
al.
Copyright
©
2013
W3C
®
(
MIT
,
ERCIM
,
Keio
,
Beihang
),
All
Rights
Reserved.
$Date:
2013-10-23
15:08:18
2013-11-16
22:16:40
$