Requirements For Captioning Live Video

Live subtitles allow deaf or hard-of-hearing listeners to access voice signatures in real-time. Preferred for situations where 99% – 100% accuracy is required.

Signers listen to meetings and typically negotiate dialog boxes in transcription software such as Dragon Dictate. The subtitles are then edited and returned to meeting attendees via the meeting software and/or website. You can find the best live captioning service via

Image Source: Google

Since the advent of C-Print and Communication Access Realtime Translation (CART) along with the capabilities of laptops and adapters to show captions on screens, it is possible for people who are deaf or hard of hearing, among others, to have direct captioning of live events. Streaming video of the event over the open Web requires captions, so it is a way to be compliant both on-site and in Web communications.

There are two main types of labels: C-Print / Typewell and CART.

C-print and typewriter

C-Print and Typewell provide content-based transcription from meaning to mean in real-time (similar to interpreters) rather than verbatim. They convey meaning in fewer words. C-Print is based on phonetics and Typewell is spelling. Both are usually cheaper than CART.


CART provides word-by-word literal transcriptions in real-time, eg. Court Reporting.

Several subtitle providers produce real-time subtitles for Zoom. Universities typically use Ai-Media for their long-distance live closed text services.