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More important question: Why subtitles are called "closed captions"?

• epakai 4y ago
  Open captions refer to captions that are part of the video image (sometimes called burned in). In movies they might be used to pass setting information for a scene like time or location. Closed captions are encoded separately and their display is elective.
  • cratermoon 4y ago
    Today I Learned. Thank you.