Avid Technology AirSpeed Multi Stream, Инструкция по установке и эксплуатации

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Closed Caption
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Closed Caption
Closed caption information can be captured on ingest and supported on playout. This
information is embedded in the video signal, invisible without a decoder. Closed captions
are stored in line 21 of the vertical blanking interval (VBI) or CC special for NTSC, as well
as EIA/CEA-608 and EIA/CEA-708 ancillary caption data in HD formats.
Up/Down/Cross (UDX) Conversion
AirSpeed Multi Stream supports Up, Down or Cross (UDX) conversion of video formats.
Using this feature, you can configure a channel to allow for conversion of a clip and its
ancillary data (where available) to convert to a specific format for play-out. UDX
preferences can be set in the Channel Configuration dialog box. UDX options available are
the following:
• Up-Convert - SD video is up-converted to HD using one of five possible Up-Convert
options available in the user interface.
• Down-Convert - HD video is down-converted to SD using one of five possible
Down-Convert options available in the user interface.
• SD Cross Convert - SD video is cross-converted (to SD) using one of six possible
SD-Cross-Convert options available in the user interface.
• HD Cross Convert - This type of conversion only has one possible outcome, which is
Anamorphic and based on incoming video. If you have 1080i, it is automatically
converted to 720p. If you have 720p, it is automatically cross converted to 1080i. There
is no selection in the User Interface for HD Cross Convert. It is just done
anamorphically based on the incoming video standard.
For more information on using UDX Conversion, see “Configuring Channels” on page 105 ,
and Appendix D - “Up, Down, Cross Convert (UDX) Examples” on page 381 .