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