Caption / Closed Caption (CC)

What is it?

Closed captions are text of everything heard, toggleable on and off by the viewer: the dialogue plus the non-speech sounds a hearing viewer takes for granted — [door slams], [tense music], [laughter], speaker labels when faces are off screen. "Closed" means they're a hidden track the viewer chooses to display (the CC button); they were built for deaf and hard-of-hearing audiences, and their scope — all meaningful sound, not just words — is what separates them from subtitles.

Practical example

A thriller scene watched with CC on: the dialogue lines appear, but so do the cues that carry the scene's meaning — [phone buzzing], [footsteps approaching], ♪ ominous strings ♪, JOHN (whispering): "he's here." A deaf viewer receives the full storytelling, not a transcript with holes. The unplanned second life: the majority of caption users today are hearing — people on muted phones in public, in loud gyms, watching at night beside a sleeping partner. Platforms found that captioned videos hold attention measurably longer for everyone.

Key things to know (non-technical)

• The completeness standard: if a sound matters to understanding, it gets captioned — that's the defining obligation.
• "Closed" vs "open": closed = viewer-toggleable track; open = burned permanently into the picture.
• It's a legal requirement in much of broadcasting (accessibility law), and increasingly an expectation everywhere else.
• The mute-autoplay world made CC a retention feature: feeds play silent by default, and the caption is the hook that earns the sound-on.

In Tupic Live

CC support in Tupic Live's player — a viewer-side toggle on live streams and VODs, fed by the auto-transcription pipeline — serves three audiences at once: accessibility for those who need it, muted-viewing retention for the majority, and regulatory readiness for the broadcast-grade customers the platform wants.