<s>
Below	O
are	O
the	O
published	O
ATSC	B-Device
standards	I-Device
for	O
ATSC	B-Device
digital	O
television	O
service	O
,	O
issued	O
by	O
the	O
Advanced	B-Device
Television	I-Device
Systems	I-Device
Committee	I-Device
.	O
</s>
<s>
In	O
2004	O
,	O
the	O
main	O
ATSC	B-Device
standard	I-Device
was	O
amended	O
to	O
support	O
Enhanced	O
ATSC	B-Device
(	O
A/112	O
)	O
;	O
this	O
transmission	O
mode	O
is	O
backwardly	O
compatible	O
with	O
the	O
original	O
8-Bit	B-Device
Vestigal	I-Device
Sideband	I-Device
modulation	O
scheme	O
,	O
but	O
provides	O
much	O
better	O
error	O
correction	O
.	O
</s>
<s>
ATSC-M/H	B-Device
for	O
mobile	B-Application
TV	I-Application
has	O
been	O
approved	O
and	O
added	O
to	O
some	O
stations	O
,	O
though	O
it	O
is	O
known	O
that	O
it	O
uses	O
MPEG-4	B-Algorithm
instead	O
of	O
MPEG-2	B-Algorithm
for	O
encoding	O
,	O
and	O
behaves	O
as	O
an	O
MPEG-4-encoded	O
subchannel	O
,	O
inheriting	O
8VSB	B-Device
from	O
the	O
remainder	O
of	O
the	O
channel	O
.	O
</s>
<s>
ATSC	B-Device
3.0	I-Device
is	O
a	O
non-backwards-compatible	O
version	O
of	O
ATSC	B-Device
being	O
developed	O
(	O
as	O
of	O
May	O
18	O
,	O
2016	O
)	O
that	O
uses	O
OFDM	B-Protocol
instead	O
of	O
8VSB	B-Device
and	O
a	O
much	O
newer	O
video	O
codec	O
(	O
instead	O
of	O
ATSC	B-Device
1	O
and	O
2	O
's	O
MPEG-2	B-Algorithm
)	O
.	O
</s>
<s>
On	O
March	O
28	O
,	O
2016	O
,	O
the	O
Bootstrap	B-Application
component	I-Application
of	O
ATSC	B-Device
3.0	I-Device
(	O
System	O
Discovery	O
and	O
Signalling	O
)	O
was	O
upgraded	B-General_Concept
from	O
candidate	O
standard	O
to	O
finalized	O
standard	O
.	O
</s>
<s>
On	O
May	O
4	O
,	O
2016	O
,	O
the	O
Audio	O
Codec	O
component	O
of	O
ATSC	B-Device
3.0	I-Device
was	O
elevated	O
to	O
candidate	O
standard	O
,	O
with	O
two	O
finalists	O
remaining	O
:	O
Dolby	B-Algorithm
AC-4	I-Algorithm
and	O
MPEG-H	O
Audio	O
Alliance	O
format	O
from	O
Fraunhofer	O
IIS	O
,	O
Qualcomm	O
and	O
Technicolor	O
SA	O
.	O
</s>
<s>
A	O
third	O
entry	O
from	O
DTS	O
named	O
DTS:X	O
(	O
a	O
successor	O
to	O
DTS-HD	O
)	O
was	O
withdrawn	O
before	O
the	O
standard	O
was	O
upgraded	B-General_Concept
to	O
candidate	O
status	O
.	O
</s>
<s>
On	O
September	O
8	O
,	O
2016	O
,	O
the	O
Physical	O
Layer	O
Download	B-Application
(	O
OFDM	B-Protocol
)	O
component	O
of	O
ATSC	B-Device
3.0	I-Device
was	O
upgraded	B-General_Concept
from	O
candidate	O
standard	O
to	O
finalized	O
standard	O
.	O
</s>
<s>
ATSC	B-Device
Technology	O
Group	O
3	O
(	O
TG3	O
)	O
members	O
have	O
also	O
begun	O
voting	O
on	O
elevating	O
the	O
following	O
Candidate	O
Standards	O
to	O
Proposed	O
Standard	O
status	O
(	O
the	O
final	O
step	O
before	O
becoming	O
an	O
approved	O
standard	O
)	O
:	O
Service	O
Announcement	O
(	O
A/322	O
)	O
,	O
Service	O
Usage	O
Reporting	O
(	O
A/333	O
)	O
and	O
Captions	O
and	O
Subtitles	O
(	O
A/343	O
)	O
.	O
</s>
<s>
On	O
March	O
30	O
,	O
2016	O
,	O
A/324	O
(	O
Schedule	O
and	O
Studio-to-Transmitter	O
Link	O
)	O
was	O
upgraded	B-General_Concept
from	O
Proposed	O
to	O
Candidate	O
Standard	O
.	O
</s>
<s>
On	O
January	O
3	O
,	O
2017	O
,	O
ATSC	B-Device
announced	O
the	O
updated	O
status	O
of	O
its	O
standards	O
,	O
in	O
time	O
for	O
its	O
debut	O
at	O
the	O
Consumer	O
Electronics	O
Show	O
in	O
Las	O
Vegas	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
this	O
update	O
,	O
Captions	O
and	O
Subtitles	O
(	O
A/343	O
)	O
was	O
upgraded	B-General_Concept
from	O
Candidate	O
to	O
Finalized	O
Standard	O
;	O
Security	O
(	O
A-360	O
)	O
,	O
Lab	O
Performance	O
Test	O
Plan	O
(	O
A-325	O
)	O
and	O
Field	O
Test	O
Plan	O
(	O
A-326	O
)	O
were	O
upgraded	B-General_Concept
to	O
Candidate	O
Standard	O
from	O
"	O
Under	O
Consideration	O
"	O
.	O
</s>
<s>
By	O
March	O
7	O
,	O
2017	O
,	O
ATSC	B-Device
announced	O
a	O
further	O
update	O
to	O
the	O
status	O
of	O
its	O
standards	O
,	O
with	O
the	O
following	O
as	O
Finalized	O
:	O
A/321	O
(	O
System	O
Discovery	O
and	O
Signaling	O
)	O
;	O
A/322	O
Physical	O
Layer	O
Protocl	O
(	O
COFDM	B-Protocol
)	O
;	O
A/326	O
(	O
Field	O
Test	O
Plan	O
[	O
Recommended	O
Practice ]	O
)	O
;	O
A/330	O
(	O
Link	O
Layer	O
Protocol	O
)	O
;	O
A/333	O
(	O
Service	O
Usage	O
Reporting	O
)	O
;	O
A/334	O
(	O
Audio	O
Watermark	O
Emission	O
)	O
;	O
A/335	O
(	O
Video	O
Watermark	O
Emission	O
)	O
;	O
A/336	O
(	O
Content	O
Recovery	O
in	O
Redistribution	O
Scenarios	O
[	O
ATSC	B-Device
3.0	I-Device
over	O
Cable	O
and	O
Satellite ]	O
)	O
;	O
A/342	O
Part	O
1	O
(	O
Audio	O
Common	O
Elements	O
)	O
;	O
A/342	O
Part	O
2	O
(	O
Audio	O
:	O
Dolby	B-Algorithm
AC-4	I-Algorithm
System	O
)	O
;	O
A/342	O
Part	O
3	O
(	O
Audio	O
MPEG-H	O
System	O
)	O
;	O
and	O
A/343	O
(	O
Captions	O
and	O
Subtitles	O
)	O
.	O
</s>
<s>
The	O
following	O
are	O
Proposed	O
Standards	O
:	O
A/325	O
(	O
Lab	O
Performance	O
Test	O
Plan	O
[	O
Recommended	O
Practice ]	O
)	O
;	O
A/332	O
(	O
Service	O
Announcement	O
)	O
;	O
A/338	O
(	O
Companion	O
Device	O
)	O
;	O
A/341	O
(	O
Video	O
-	O
H.265/HEVC	B-Algorithm
)	O
.	O
</s>
<s>
The	O
following	O
are	O
Candidate	O
Standards	O
:	O
A/300	O
(	O
ATSC	B-Device
3.0	I-Device
System	O
)	O
;	O
A/324	O
(	O
Scheduler/Studio	O
-to-Transmitter	O
Link	O
)	O
;	O
A/331	O
(	O
Signalling	O
,	O
Delivery	O
,	O
Sync	O
Error	O
Protection	O
)	O
;	O
A/337	O
(	O
Application	O
Signalling	O
)	O
;	O
A/344	O
(	O
Interactive	O
Content	O
)	O
;	O
A/360	O
(	O
Security	O
and	O
Service	O
Protection	O
)	O
.	O
</s>
<s>
A/341:2018	O
,	O
“	O
Video	O
–	O
HEVC	B-Algorithm
,	O
With	O
Amendments	O
No	O
.	O
</s>
