What is offline captioning?

Offline captioning refers to captioning that is done after the event, usually referring to a recorded audio track. Offline captioning accuracy rates are generally much higher than real time. Offline captioning allows the transcription stenographer to look up words, check names and spelling, and to edit content before publishing. A trained stenographer may take anywhere from 5-10 hours to transcribe an hour of audio, with a goal of greater than 99% accuracy.