What Are Closed Captions? Meaning and Purpose

What closed captions mean

Closed captions are on-screen text that shows the spoken dialogue and other important audio in a video, and the viewer can turn them on or off. Besides speech, they usually include speaker identification and non-speech sounds such as music, laughter, a doorbell or an off-screen noise. Their main purpose is to make video accessible to people who are deaf or hard of hearing. They also help anyone watching with the sound low or muted, in a noisy room, or in a language they are still learning.

The word "closed" means the text is hidden until you enable it. Open captions are the opposite: they are burned into the picture, so everyone sees them and they cannot be switched off.

How closed captions work

On broadcast television, caption data travels with the program signal, and a decoder in the TV or receiver turns it into text when captions are enabled. In North America, analog broadcasts carried captions under the CEA-608 standard, and digital broadcasts use CEA-708, which also allows viewers to change caption size, color and background. Other regions use different systems, such as teletext or digital broadcast subtitles, so the exact behavior depends on where and how you watch.

Streaming services and video files handle captions differently. The text is stored as a separate caption track, either inside the video container or as a sidecar file such as SRT or WebVTT, and the player draws it on screen. That is why the caption switch in a streaming app is independent of the caption setting on the TV itself.

Captions and subtitles are related but not identical. Subtitles typically assume the viewer can hear the audio and only translate or transcribe dialogue. Captions are written for viewers who cannot hear it, so they describe relevant sounds as well. Many devices and apps label both under one setting, and some offer a separate track often called SDH (subtitles for the deaf and hard of hearing) that works like captions.

The CC icon and logo

The letters CC stand for closed captions. A CC logo in a TV guide, on packaging or next to a program title means captions are available. In video players, a CC button or a speech-bubble icon toggles captions or opens the caption and subtitle menu. The exact icon varies by app and device.

How to turn on closed captions

Where the switch lives depends on what is actually decoding the video. Use this order to find it:

• Watching through a streaming app or web player: start playback, open the player controls and look for the CC or subtitles icon. Pick a caption language or track there.
• Watching live TV through the TV's own tuner: enable captions in the TV's settings, often under accessibility or a caption or subtitle option. Check the TV's manual for the exact path, because it changes between brands and software versions.
• Watching through a cable, satellite or streaming box connected by HDMI: enable captions on that box, not on the TV.
• If the remote has a CC or subtitle button, it may toggle captions directly. Not every remote has one.
• If captions turn on but nothing appears, confirm the program or video actually has a caption track.

Getting captions on a TV with a cable or satellite box

A common reason captions seem not to work on TV is that the caption setting was enabled on the television while the video comes from an external box over HDMI. HDMI generally does not pass broadcast caption data through to the TV's decoder, so the box has to render the captions itself. Turn captions on in the box's settings or with its remote, and the text will be part of the picture the TV receives.

Closed captions on an LG TV

On an LG TV, the caption or subtitle option for live TV is in the TV's settings, but its location and name differ between webOS versions and models, so follow the user manual or the on-screen help for your specific set. Apps installed on the TV, such as streaming services, have their own caption controls inside playback. For a connected cable or satellite box, use the box's caption setting as described above.

Captions in video calls and recordings

Many video meeting apps offer live captions generated automatically from speech, usually toggled from the call controls with a CC or captions button. Availability depends on the app, the plan and the meeting host's settings. For recorded video, you can attach a caption file or use an editor's caption track so viewers can enable it, or burn the text into the image if you need open captions that always show.

Limits and related questions

Caption quality varies. Prepared captions for recorded programs are usually accurate and well timed. Live captions, whether written by a human captioner or generated automatically, can lag behind the speech and contain errors, especially with names, technical terms, accents, crosstalk or poor audio. Clear microphone audio improves automatic captions noticeably.

• Captions appear in the wrong language: choose a different caption track in the player or check the language setting on the device that decodes them.
• Text is too small or hard to read: look for caption style options such as size, color and background on the TV, box or app.
• Captions appear twice: they are likely enabled on two devices at once, so turn them off on one.
• No CC option at all: the content may not include captions, or the current app or input does not support them.

If you use automatic captions in calls or caption tools for your own recordings, check how the service processes audio. Some generate captions on the device, others send audio to a server, and some save transcripts with the recording. Review the app's documentation and privacy settings to confirm what is stored and who can access it, rather than assuming captions are discarded after viewing.