Closed Captions - Pop Up Captioning
There are three types of styles used in foreign language captioning and subtitling.
Roll-up or scroll-up or scrolling
The words appear from left to right, up to one line at a time; when a line is filled, the whole line scrolls up to make way for a new line, and the line on top is erased. The captions usually appear at the bottom of the screen, but can actually be placed anywhere to avoid covering graphics or action. A still frame showing simulated closed captioning in the pop-on style.
Pop-on or pop-up or block:
A caption appears anywhere on the screen as a whole, followed by another caption or no captions. This method is used for most pre-taped television and film programming.
The caption, whether it be a single word or a line, appears on the screen letter-by-letter from left to right, but ends up as a stationary block like pop-on captions. This format is rarely used today.
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