Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- CEA-708(also: CTA-708, EIA-708, Digital Closed Captioning)
- A US standard for digital closed captioning on digital television broadcasts and streaming, superseding the analog-era CEA-608 standard. CEA-708 supports richer presentation than its predecessor, including multiple fonts, colours, opacity, text positioning, and up to 63 caption…
- Dynamic Caption Tracking(also: Word-by-Word Highlighting, Synchronized Caption Highlighting)
- A caption display feature that highlights or visually emphasizes the word currently being spoken in the caption text, synchronized with the audio. Dynamic caption tracking helps viewers maintain their reading position within captions and re-engage after momentary attention…
- Stenographer(also: Stenocaptioner, Court Reporter)
- A trained professional who produces real-time verbatim transcription of speech, typically using a stenotype machine that maps chorded key combinations to phonetic syllables. In accessibility contexts, stenographers (sometimes called stenocaptioners or CART providers) produce…
- Subtitle(also: Subtitles, Open captions (video), Movie subtitles)
- On-screen text that reproduces the spoken dialogue of a video, most commonly rendered in a "movie subtitle" style (white text with a black outline, one or two lines at the bottom of the frame). Subtitles are closely related to captions but are conventionally distinguished in…
- Tracked Captions(also: Speaker-following captions, Dynamic captions)
- Captions that move dynamically within the video frame to stay near the current speaker's face or mouth, rather than remaining anchored at a fixed position (typically the bottom of the video). Tracked captions reduce the visual effort required for Deaf and Hard-of-Hearing viewers…
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