Note: the current PBS Closed Caption format supported by COVE 2.0 is SAMI. We are actively working to implement the standards defined below over the next few months.

Please see the 2017 FCC-Required Captioning Update

PBS Closed Captioning Requirements

Guided by the new FCC regulations, PBS Interactive is adopting Society of Motion Picture and Television Engineers Timed Text (SMPTE-TT) as the format for online closed captioning. To support a broad range of producer toolchains and workflows, we will also accept Synchronized Accessible Media Interchange (SAMI) and Scenarist Closed Caption (SCC) files during video ingest into COVE 2.0. If one of these "legacy" formats is provided, the COVE 2.0 system will automatically convert it to SMPTE-TT for storage and online display.

Closed Caption assets should be delivered in sync with the final output media, including any edits made prior to the encoding process (e.g. for the removal of funder messages).

PBS' Media Operations Center will provide SMPTE-TT captioning files for all output media that has captioning encoded (Line 21 - CEA608) on the source material.

New FCC Regulation

Full text of the regulation:FCC regulations

A couple of highlights:

SMPTE-TT

File Extension: .xml (or .ttml or .dfxp)

Labeled the Time Text Format (SMPTE-TT), SMPTE 2052 defines the SMPTE profile of the W3C Timed Text Markup Language (TTML) (http://www.w3.org/TR/ttaf1?dfxp/). (more info)

In a nutshell: SMPTE-TT = TTML = DFXP

 
<?xml version="1.0" encoding="UTF-8"?>
<tt xmlns="http://www.w3.org/ns/ttml" xml:lang="en">
 <body>
  <div>
   <p begin="0:00:03.66" end="0:00:05.56">
    YOU HAVE TO HAVE YOUR THEATERS.
   </p>
   <p begin="0:00:05.56" end="0:00:07.26">
    YOU HAVE TO HAVE<br/>
    YOUR FIRST RUN MOVIES
   </p>
   <p begin="0:00:07.26" end="0:00:09.73">
    AND YOUR OPERA AND YOUR BALLET<br/>
    AND YOUR SYMPHONIES.
   </p>
   <p begin="0:00:09.73" end="0:00:12.90">
    AND YOU ALSO HAVE TO<br/>
    HAVE A BALLPARK.
   </p>
   <p begin="0:00:12.90" end="0:00:15.80">
    Narrator: AND BOSTON DOESN&apos;T<br/>
    HAVE JUST ANY BALLPARK.
   </p>
   <p begin="0:00:15.80" end="0:00:17.30">
    IT HAS THE BALLPARK
   </p>
   <p begin="0:00:17.30" end="0:00:20.93">
    THAT EVERY OTHER MAJOR LEAGUE<br/>
    CITY WISHES IT HAD.
   </p>
   <p begin="0:00:23.23" end="0:00:25.66">
    Mike Barnicle: YOU CAN WALK<br/>
    TO THE BALLPARK.
   </p>
   <p begin="0:00:25.66" end="0:00:27.50">
    THAT&apos;S A HUGE THING.
   </p>
   <p begin="0:00:27.50" end="0:00:29.23">
    AND YOU CAN SENSE IT<br/>
    BECKONING YOU--
   </p>
   <p begin="0:00:29.23" end="0:00:29.23">
    COME ON, COME ON, YOU&apos;RE<br/>
    GETTING CLOSER, COME ON IN.
   </p>
  </div>
 </body>
</tt>
 

SCC

File extension: .scc

See the SCC Tools documentation for details of this format: http://www.theneitherworld.com/mcpoodle/SCC_TOOLS/DOCS/SCC_FORMAT.HTML

 
Scenarist_SCC V1.0
00:00:02:25	9420 9470 97a1 d94f d520 c8c1 d645 2054 4f20 c8c1 d645 20d9 4fd5 5220 54c8 45c1 5445 52d3 ae80 942c 8080 8080 942f
00:00:04:18	9420 94d0 97a1 d94f d520 c8c1 d645 2054 4f20 c8c1 d645 d94f d552 2046 4952 d354 2052 d5ce 9476 97a1 cd4f d649 45d3 942c 8080 8080 942f
00:00:06:02	9420 9452 97a1 c1ce c420 d94f d552 204f d045 52c1 20c1 cec4 20d9 4fd5 5280 9470 9723 c2c1 4c4c 4554 c1ce c420 d94f d552 20d3 d9cd d0c8 4fce 4945 d3ae 942c 8080 8080 942f
00:00:08:24	9420 94d0 9723 c1ce c420 d94f d520 c14c d34f 20c8 c1d6 4520 544f c8c1 d645 20c1 9476 c2c1 4c4c d0c1 52cb ae80 942c 8080 8080 942f
00:00:11:22	9420 94d0 ce61 f2f2 61f4 eff2 ba20 c1ce c420 c24f d354 4fce 20c4 4f45 d3ce a754 c8c1 d645 94f2 9723 4ad5 d354 20c1 ced9 20c2 c14c 4cd0 c152 cbae 942c 8080 8080 942f
00:00:15:05	9420 94f2 9723 4954 20c8 c1d3 2054 c845 20c2 c14c 4cd0 c152 cb80 942c 8080 8080 942f
00:00:16:05	9420 9452 97a1 54c8 c154 2045 d645 52d9 204f 54c8 4552 20cd c14a 4f52 94f2 4c45 c1c7 d545 4349 54d9 2057 49d3 c845 d320 4954 20c8 c1c4 ae80 942c 8080 8080 942f
00:00:20:21	9420 942c 8080 8080 942f
00:00:22:04	9420 94d0 97a2 cde9 6be5 20c2 61f2 6ee9 e3ec e5ba 20d9 4fd5 2043 c1ce 2057 c14c cb54 4f80 94f4 97a2 54c8 4520 c2c1 4c4c d0c1 52cb ae80 942c 8080 8080 942f
00:00:25:01	9420 94f2 97a2 54c8 c154 a7d3 20c1 20c8 d5c7 4520 54c8 49ce c7ae 942c 8080 8080 942f
00:00:26:16	9420 94d0 97a2 c1ce c420 d94f d520 43c1 ce20 d345 ced3 4520 4954 c245 43cb 4fce 49ce c780 9476 97a2 d94f d5ad ad80 942c 8080 8080 942f
00:00:28:00	9420 94d0 97a1 434f cd45 204f ce2c 2043 4fcd 4520 4fce 2c20 d94f d5a7 5245 c745 5454 49ce c780 94f2 9723 434c 4fd3 4552 2c20 434f cd45 204f ce20 49ce ae80 942c 8080 8080 942f
 

 

SAMI

File Extension: .sami

For up to date resources on SAMI generation, see the SAMI article on Wikipedia or visit the WGBH National Center for Accessible Media website. Specifications for the format can be found through the Microsoft Developer Network site.

For even more information about exactly what a SAMI file is and how it can be generated please visit page: http://webaim.org/techniques/captions/windows/sami&nbsp;

 
<sami>
<head>
<style type="text/css">
<!--
.ENCC {Name: English; lang: en-US; SAMI_Type: CC;}
-->
</style>
</head>
<body>
<sync start="3670">
<p class="ENCC">
 YOU HAVE TO HAVE YOUR THEATERS.
</p>
</sync>
<sync start="5572">
<p class="ENCC">
 YOU HAVE TO HAVE<br/>
 YOUR FIRST RUN MOVIES
</p>
</sync>
<sync start="7273">
<p class="ENCC">
 AND YOUR OPERA AND YOUR BALLET<br/>
 AND YOUR SYMPHONIES.
</p>
</sync>
<sync start="9743">
<p class="ENCC">
 AND YOU ALSO HAVE TO<br/>
 HAVE A BALLPARK.
</p>
</sync>
<sync start="12912">
<p class="ENCC">
 Narrator: AND BOSTON DOESN'T<br/>
 HAVE JUST ANY BALLPARK.
</p>
</sync>
<sync start="15815">
<p class="ENCC">
 IT HAS THE BALLPARK
</p>
</sync>
<sync start="17317">
<p class="ENCC">
 THAT EVERY OTHER MAJOR LEAGUE<br/>
 CITY WISHES IT HAD.
</p>
</sync>
<sync start="20954">
<p class="ENCC">
 &nbsp;
</p>
</sync>
<sync start="23256">
<p class="ENCC">
 Mike Barnicle: YOU CAN WALK<br/>
 TO THE BALLPARK.
</p>
</sync>
<sync start="25692">
<p class="ENCC">
 THAT'S A HUGE THING.
</p>
</sync>
<sync start="27527">
<p class="ENCC">
 AND YOU CAN SENSE IT<br/>
 BECKONING YOU--
</p>
</sync>
<sync start="29262">
<p class="ENCC">
 COME ON, COME ON, YOU'RE<br/>
 GETTING CLOSER, COME ON IN.
</p>
</sync>
</body>
</sami>