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13 lines
663 B
Text
13 lines
663 B
Text
The Zapping VBI library, in short ZVBI, provides functions to
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capture and decode VBI data. It is written in plain ANSI C with few
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dependencies on other tools and libraries, licensed under GPL.
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The vertical blanking interval (VBI) is an interval in a television
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signal that temporarily suspends transmission of the signal for the
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electron gun to move back up to the first line of the television
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screen to trace the next screen field.
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The vertical blanking interval can be used to carry data, since
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anything sent during the VBI would naturally not be displayed; various
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test signals, closed captioning, and other digital data can be sent
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during this time period.
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