Apex Captioning San Diego provides open and closed captions

Captions may be “open” or “closed.”
To view closed captions, viewers need a set-top decoder or a television with built-in decoder circuitry.
Open captions appear on all television sets and can be viewed without a decoder.
In the past, some news bulletins, presidential addresses, or programming created by or for deaf and hard-of-hearing audiences were open captioned.
With the widespread availability of closed-caption technology, open captions are rarely used.

We are a Digital closed captioning company in san diego with nationwide coverage

Closed captioning has become available for digital television sets, such as high-definition television (HDTV) sets, manufactured after July 1, 2002. Digital captioning provides greater flexibility by enabling the viewer to control the caption display, including font style, text size and color, and background color.

1 Zenith Electronics Corporation, July 1, 2002