In this guide
The difference is about conveyed meaningClosed and open describe presentation controlCheck a track as a real part of playbackCaptions communicate spoken content and relevant non-speech audio information, such as speaker identity, meaningful sound effects and music. Dialogue-only subtitles may translate or transcribe speech without carrying all of that additional meaning. Usage of the words varies across regions and products, so inspect the actual track rather than relying only on its label.
A subtitle button therefore does not establish that every programme offers a complete accessibility caption track. Availability and quality need to be checked for the particular presentation.
The difference is about conveyed meaning
If a scene depends on a door alarm, off-screen speaker or a change in music, dialogue alone may not communicate the event to someone who cannot hear it. Captions aim to preserve relevant audio meaning in synchronized text. They should not be confused with audio description, which conveys relevant visual information through sound.
An original hypothetical scene shows two people facing away while an unseen person speaks. A caption can identify the speaker when that identity is needed. A dialogue-only line without attribution may leave the viewer unable to know who spoke.
Closed and open describe presentation control
Closed captions can be enabled or disabled by the viewer through a supported track path. Open captions are incorporated into the visible video image and cannot be removed independently by switching off a separate text track. This is another distinction from language or completeness of information.
| Question | What to inspect |
|---|---|
| Does the track translate speech? | Language and actual text |
| Does it carry relevant sound/speaker meaning? | Caption content in representative scenes |
| Can it be toggled? | Separate track versus text in the picture |
| Does visual information have a spoken alternative? | Audio-description option, separately from captions |
Check a track as a real part of playback
Look for synchronized timing, readable placement and the intended language/listening option. A technically delivered text file can still be incomplete or poorly timed. A missing option in one player may reflect selection or support limits rather than proving the source has no caption data.
This explanation concerns technical and accessibility terminology. It does not assert any provider’s current caption catalogue or make a legal-compliance guarantee.