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InterCast was a modern teletext-like system created by Intel in 1996, using a TV tuner card installed in a desktop PC running Windows with the InterCast Viewer software. The software would receive data representing HTML pages via the VBI (Vertical Blanking Interval) of a television channel's video, while displaying in a window in the InterCast ...
From the expression "closed captions", the word "caption" has in recent years come to mean a subtitle intended for the deaf or hard-of-hearing, be it "open" or "closed". In British English, "subtitles" usually refers to subtitles for the deaf or hard-of-hearing (SDH); however, the term "SDH" is sometimes used when there is a need to make a ...
Closed caption capability is also available, with the ability for 3rd-party closed caption devices to plug into the digital cinema server. Probably the best known closed captioning option for film theaters is the Rear Window Captioning System from the National Center for Accessible Media. Upon entering the theater, viewers requiring captions ...
CTA-708 (formerly EIA-708 and CEA-708) is the standard for closed captioning for ATSC digital television (DTV) viewing in the United States and Canada.It was developed by the Consumer Electronics sector of the Electronic Industries Alliance, which became Consumer Technology Association.
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The player supports subtitles and closed-captioning for local media, video on demand streaming or live streaming scenarios. Typically Windows Media captions support the SAMI file format but can also carry embedded closed caption data. The player can use video overlays or VMR (Video Mixing Renderer) surfaces, if the video card supports them.
Rear Window captioning is an alternative to open captioning, in which text is permanently visible. Open captioning has been little-used due to the fear that it was too intrusive and noticeable to hearing viewers. However, no studies have been conducted to elicit hearing people's opinions on how they will adapt to reading captions on screen.
As such, any closed caption stream must be decoded and included as an image in the video stream(s) prior to transmission over an HDMI cable to appear on the DTV. This limits the caption style (even for digital captions) to only that decoded at the source prior to HDMI transmission.