Cavena can supply tools that reads the video signal when played out from tape, extracts the VBI (EBU Teletext or Line-21) and creates subtitle files that can be used for file based transmission in any format.
The Cavena transmission system can also be configured to extract VBI from tapes and trans code the subtitles live into any transmission format, including DVB, in-vision, HD etc. The transmission system can also swap between file based playout and transcode mode for the same channel, thereby allowing a playout using both subtitle files and VBI material from tape or servers.