Jisho

×
(放送)
Wikipedia definition
1. Test cardA test card, also known as a test pattern, is a television test signal, typically broadcast at times when the transmitter is active but no program is being broadcast (often at startup and closedown). Used since the earliest TV broadcasts, test cards were originally physical cards at which a television camera was pointed, and such cards are still often used for calibration, alignment, and matching of cameras and camcorders.
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Read “テストパターン (放送)” on Japanese Wikipedia
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