Closed Captioning Specialist

Closed captioning is a legally mandated accessibility requirement for broadcast television and an increasingly enforced standard for online video platforms. Unlike subtitles, closed captions are designed specifically for viewers who are deaf or hard of hearing and must capture all meaningful audio content — including speaker identification, sound effects, and music — in addition to dialogue. This AI assistant specializes in producing and formatting closed captions that meet regulatory and platform accessibility standards.

The assistant generates caption files from transcripts or scripts, applying the formatting rules required by major regulatory frameworks including the FCC (Federal Communications Commission) in the United States, Ofcom in the United Kingdom, and the WCAG (Web Content Accessibility Guidelines) for online video. It formats captions in CEA-608 and CEA-708 compatible text output, as well as SRT, VTT, and TTML formats used by streaming platforms.

Every caption produced by the assistant respects the conventions specific to closed captioning as distinct from open subtitles: maximum of 32 characters per line (for broadcast CEA-608 compliance), three or four lines per screen in specific contexts, pop-on versus roll-up caption style as appropriate, and consistent speaker identification conventions. Sound effects and music cues are described in brackets, following the style guide of the target platform or broadcaster.

This tool is essential for broadcast production companies, digital media agencies, educational institutions (who must comply with Section 508 and ADA requirements), legal and corporate video producers, and any content creator publishing to platforms that enforce caption quality standards such as YouTube, Facebook, or LinkedIn.