Closed Captions (CC)

More Than Just Dialogue

Closed Captions (CC) are an essential accessibility feature that provides a textual representation of a film or television show’s audio track. The term ‘closed’ signifies that the captions are not permanently visible; they are encoded as a separate data stream that the viewer can choose to turn on or off at their discretion through their television, media player, or streaming app settings. While they serve a critical function for viewers who are deaf or hard of hearing, they have also become a widely used feature for a variety of other viewing habits.

What Closed Captions Include

Unlike subtitles, which typically only transcribe spoken dialogue, closed captions are designed to convey the entire auditory experience of a film. A comprehensive caption track includes:

• Spoken Dialogue: Verbatim transcription of what characters are saying.
• Speaker Identification: When it is not obvious who is speaking, captions will often identify the speaker, sometimes by name or by a label like (man) or (on TV). Example: MAN (over radio): Mayday! Mayday!
• Non-speech Sounds: Crucial sound effects and auditory cues are described in brackets to inform the viewer of important off-screen action or to convey mood. Examples: [door creaks], [tires screech], [gunshot in distance].
• Music Cues: The presence and style of music are often described to convey the emotional tone of a scene. Examples: [tense music playing], [upbeat pop song begins], or lyrics may be included, often denoted by musical notes ♪ I'm walking on sunshine ♪.

Primary and Secondary Audiences

The primary audience for closed captions is individuals who are deaf or hard of hearing, for whom captions provide the only access to the audio portion of the story. However, their use has become far more widespread:

• Noisy Environments: Viewers in loud places like bars, gyms, or airports rely on captions to follow along.
• Sound-off Viewing: A growing number of people, particularly on social media, watch videos with the sound off by default.
• Language and Accent Comprehension: Captions are helpful for understanding dialogue spoken with a thick accent, mumbled, or obscured by loud sound effects.
• Learning and Literacy: They are also used as a tool for people learning a new language or for improving reading skills.

Due to their critical accessibility function, the provision of closed captions is legally mandated for most broadcast and streaming content in many countries, such as through the Americans with Disabilities Act (ADA) in the United States.