Repurposing TV Closed Caption Files For Internet Video Distribution

April 2014 brought new changes to the United States FCC regulations regarding closed captioning requirements for broadcast TV and for Internet videos. One of these changes is the start of enforcement of an existing rule, and another is a brand new set of requirements for captioning quality and accuracy, something which most TV broadcasters have not been required to do in the past. Just as audio and video quality is imperative for creating effective content, quality closed captioning must also be a first-class component of any video content.

TV broadcasters, content providers and distributors, and Internet streaming providers all have new responsibilities under the new mandates.

Having access to software that can identify and fix captioning issues is critical to broadcasters and internet video providers who fall under the new FCC mandates. Without captioning software, they will have to rely on an out-of-house captioning service company and their bandwidth to resolve problems.

Telestream captioning products help bring the “dark art” of closed captioning within reach of TV broadcast engineers who need to manage archives of TV content that have already been captioned. Together, Telestream’s Vantage and CaptionMaker/MacCaption products provide a solution to transcode, convert, author, edit, troubleshoot, modify, and deploy caption data alongside video – regardless of the delivery platform.

FCC Requirements for Closed Captioning

On January 13, 2012, the FCC released a Report and Order adopting rules for closed captioning of video programming delivered using Internet protocol (the “IP closed captioning rules”). These closed captioning rules were published in the Federal Register on March 30, 2012, and became effective on April 30, 2012.

The IP closed captioning rules apply to non-exempt full-length programming and are being implemented according to the following schedule:

  • Pre-recorded programming that is not edited for internet distribution must be captioned if it is shown on television with captions on or after September 30, 2012.
  • Pre-recorded programming that is edited for internet distribution must be captioned if it is shown on television with captions on or after September 30, 2013.
  • Live and near-live programming must be captioned if it is shown on television with captions on or after March 30, 2013. Near-live programming is video programming that is performed and recorded less than 24 hours prior to the time it was first shown on television.
  • Programming that is already in the video programming distributor’s or provider’s library before it is shown on television with captions must be

Within 45 days after it is shown on television with captions on or after March 30, 2014 and before March 30, 2015

Within 30 days after it is shown on television with captions on or after March 30, 2015 and before March 30, 2016

Within 15 days after it is shown on television with captions on or after March 30, 2016

To clarify what this may mean to you, consider the example of a content provider or distributor with an archive of older TV content which was not previously closed captioned for broadcast and did not require captions when distributed on the Internet. If that content is shown on broadcast TV after March 30, 2014 with closed captions (which are now almost always required), then the Internet version must have captions added within 45 days of the TV broadcast date. In 2015 the time window changes to 30 days, and in 2016 it changes to 15 days. To satisfy these requirements, Internet video providers need an automated way to convert the new TV broadcast closed captions into Internet closed captions.

A second set of requirements, which were announced by the FCC in April 2014 and will take effect no sooner than January 2015, apply to all TV broadcast and Internet programming which requires captions. The new rules address caption quality in several areas including accuracy of the text, synchronicity (timing), program completeness, and visual placement of closed captions to avoid covering important on-screen information. The commission also adopted measures to ensure greater access to news programming in local communities, which may result in the need to caption some news programming that previously aired uncaptioned.

Understanding Closed Caption Files

To fully understand some of the challenges that content providers face when converting TV caption files for the Internet, we need to better understand what a TV caption file is and how it is created.

Closed captioning files for TV can be very complex file formats that include control codes, frame rates, positioning, and additional metadata that TV closed captioning systems can read. TV caption files are often archived in old legacy file formats that cannot be used with newer Internet video players. It is essential for broadcasters to implement software systems that can automatically convert these files to newer formats.

Closed caption files for the Internet can include a variety of different file formats, but the video player developer usually dictates which file format is used. For example, many developers use Timed Text Markup Language, or TTML (also known as DFXP), for Flash video players.

However, Flash video players potentially can support a variety of caption file formats. YouTube’s Flash video player, for example, supports TTML, but also supports SRT, SCC, and WebVTT. Some Internet caption files are very simple and support only basic features such as timing and line breaks. These files may not conform to all of the FCC legal requirements for Internet captions to match the look and feel of the TV broadcast captions. Newer, more advanced Internet caption files, such as SMPTE Timed Text 2052 and WebVTT, have the advanced characteristics of TV closed captioning and can meet the latest requirements.

Benefits of Closed Captioning Internet Videos

There are two compelling benefits of providing closed captions with Internet videos. The first, which is reason enough for conversion, is the FCC’s new laws requiring such conversion. The second benefit of deploying closed captions on Internet videos is the ability to reach a wider audience. People who are deaf or hard-of-hearing rely on closed captioning to receive information presented through video. Increasingly, that information is distributed via videos on the Internet. Also, people whose native language is not English rely on closed captioning for improved comprehension and fluency. Restaurants, bars, airports, and other public facilities rely on closed captions to help convey vital information when the audio content cannot be heard. Including closed captions on all Internet videos ensures that these important audiences are reached.

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