The CC100 closed caption decoder by Broadcast Video Systems ensures that valid closed captioning is present in a broadcast facility. The unit decodes line 21 data and inserts closed captioning text into baseband video. The CC100 has convenient switching which allows a selection of language one or language two, and a selection of closed captioning or text. The decoder has and on-board DC regulator and is supplied with a 9 VDC adapter. Six decoders may be mounted in a 1RU frame. May be installed into any monitor feed containing closed captioning.