What is the difference between open and closed captions?
Open captions are displayed automatically as part of the video, without having to be selected by the user. Closed captions normally do not appear on screen unless the viewer has selected them to appear. The person viewing the presentation must be using technology that includes a closed caption decoder. The decoder will allow the otherwise-hidden data within the television signal to be displayed on the user’s TV screen or computer monitor. Many newer television models allow viewers to toggle captions on or off with ease.