Captions aim to describe to the deaf and hard of hearing all significant audio content - spoken dialogue and non-speech information such as the identity of speakers and, occasionally, their manner of speaking - along with any significant music or sound effects using words or symbols. Subtitles assume the viewer can hear but cannot understand the language or accent, or the speech is not entirely clear, so they transcribe only dialogue and some on-screen text. In the United States and Canada, the terms "subtitles" and "captions" have different meanings. On the other hand, "open", "burned-in", "baked on", "hard-coded", or simply "hard" captions are visible to all viewers as they are embedded in the video. The term "closed" (versus "open") indicates that the captions are not visible until activated by the viewer, usually via the remote control or menu option. 6.11 Non-linear video editing systems and closed captioning.5.3 Digital television standard captioning improvements.
#LIVE CLOSED CAPTIONING TV#
5.1 Incompatibility issues with digital TV. 5 Digital television interoperability issues. 2.6 Legislative development in Australia. 2.4 Legislative development in the U.S. 2.2 Technical development of closed captioning. HTML5 defines subtitles as a "transcription or translation of the dialogue when sound is available but not understood" by the viewer (for example, dialogue in a foreign language) and captions as a "transcription or translation of the dialogue, sound effects, relevant musical cues, and other relevant audio information when sound is unavailable or not clearly audible" (for example, when audio is muted or the viewer is deaf or hard of hearing). Other uses have included providing a textual alternative language translation of a presentation's primary audio language that is usually burned-in (or "open") to the video and unselectable. Both are typically used as a transcription of the audio portion of a program as it occurs (either verbatim or in edited form), sometimes including descriptions of non-speech elements. A similar symbol depicting an ear (slashed or not) is used on television in several other countries, including France and Spain.Ĭlosed captioning ( CC) and subtitling are both processes of displaying text on a television, video screen, or other visual display to provide additional or interpretive information. The symbol was used on road signs to identify TTY access. 
The "Slashed ear" symbol is the International Symbol for Deafness used by TVNZ and other New Zealand broadcasters, as well as on VHS tapes released by Alliance Atlantis.
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