Closed captions are a text version of the spoken words and the written descriptions of music, sound effects, and other audio cues of a television, movie, or digital presentation (SDH).

Described Video is the audio-narrated descriptions of key visual elements that may be essential to understanding the plot inserted within natural pauses in dialogue. For instance, a narrator might describe: facial expressions, settings, actions, costumes, etc.

With so many different file types, video codecs and audio configurations available, it is sometimes challenging to identify the combination required by your distributor.

Real-time Captioning is created as an event is broadcast. A captioner simultaneously transcribes the spoken words using specialized software and equipment.