Misc. Control - evertz 7800 Manual

3.4.1. Misc. Control

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Output Video Mode: Options are continuous or discontinuous. When in continuous mode and
the user switches between inputs, the output will not be dropped between sources, the output is
thus continuous. In discontinuous mode the output, when switching between inputs, will drop
momentarily.
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Output Standard: Options are Native, 525i/59.94, 625i/50, 720p/59.94, 1080i/59.94 and
1080i/50.
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Output Video Colour: Options are Black or Blue, this is the colour that will be output when the
input is lost.
NOTE: Using Blue is a good compliment to the Evertz MVP/VIP systems, which by
default use Green to signify loss of the input. Thus a blue screen will indicate a loss
of source at the encoder, not at the MVP/VIP.
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CC608 Embed: This control allows the user to decide if Closed Caption 608 should be
embedded on the output, by default this is disabled.
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CC608 Embed Line Number: This control allows the user to select the line at which the closed
captions will be embedded; the range is line 7 to 21.
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CC708 Embed: This control allows the user to decide if Closed Caption 708 should be
embedded on the output, by default this is disabled.
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CC708 Embed Line Number: This control allows the user to select the line at which the closed
captions will be embedded; the range is line 7 to 21.
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Video Delay: This control sets the video delay. The range is 0 to 45 frames. Video is delayed
separate from audio. Audio will remain fixed and video will be delayed up to 45 frames.
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What are "native 608" closed captions?
CEA-608 ("native 608") closed captions are captions formatted and presented in the current analog
television system and carried on the two fields of line 21 of the vertical blanking interval. Field one
contains CC1, CC2, T1, and T2 (the latter being text services). Field 2 contains CC3, CC4, T3, and
T4. CC1 is most often used to carry verbatim English captions and CC3 is increasingly being used
for Spanish-language captions and captions edited for young children ("Easy Reader" or
"Beginning Reader" captions). The common look and feel of native 608 captions is limited to white
block letters within a box-like black background field. Colour (non-white) characters, while possible,
are only occasionally used due to the 13-year legacy of set-top decoders, which cannot display
coloured captions.
1
What are "native 708" closed captions?
CEA-708B is the standard for conveying caption data in a digital television signal. Because the
DTV signal does not have a vertical blanking interval, CEA-708B specifies that the captioning data
shall be carried in the video user bits of the MPEG-2 bitstream. CEA-708B captions have greatly
enhanced formatting and display capabilities compared to NTSC 608 captions. Strictly speaking,
native 708 captions are those authored and encoded for CEA-708B use. It is also possible to
encode native 708 format captioning from authoring information intended for 608 captioning,
although such captions will have the same limitations as translated captions.
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