Checkpoint B.01

Checkpoint B.01 focuses on providing captioning, video description or other equivalent alternatives in synchrony with any multimedia presentation, excluding live Webcasts.

Multimedia Presentations

A time-based presentation can include any form of multimedia, such as a movie, animation or slide show. The two typical methods of providing a multimedia alternative are captioning and transcripts. As a rule of thumb, provide synchronized captioning for video files and transcripts for audio files. Creating transcripts for audio files is covered under Checkpoint A.05.

Remember users with a visual disability, too, when designing multimedia. Although some assistive technology can interpret text in a file designed to display captions, you should also include narrated descriptions of visual presentations.


See an example of multimedia that includes complete captioning and video description.

You will need Adobe Flash to view the multimedia. Download Adobe Flash

General techniques

Currently, most popular media playback formats all support some type of captioning:

How do you ensure that your movies or multimedia meet this guideline?

In many cases multimedia projects are created for you by professional studios which already have (or ought to have) the ability to produce the accessible equivalents. When you contract for this type of work, include the accessible alternatives in your core requirements.

If you produce your own multimedia or movie clips, it is likely that you already have the tools on hand to build in to the tools you are producing with. Many standard sound, movie, animation packages can be used to create accessible formats.

At present there are three formats or languages that support the ability to synchronize equivalent alternatives. These are Apple's QuickTime, the W3C's SMIL (Synchronized Multimedia Integration Language) and Microsoft's SAMI. From the multimedia software page, we provide links to examples that demonstrate the synchronization of equivalent alternatives.

Missouri State requirements

Requirements for captioning of Multimedia presentations for the University are determined by the type of content and its intended audience. Priority for captioning is given to content which has statewide importance and events that do not provide individual accommodation requests. For more information on how the compliance will implemented across the University contact