Grass Valley SSP-3801 Installation v.1.3 - Manual (Page 8)

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Introduction
Carriage of ancillary data in clips
• Configuring a new device can be as simple as inserting it into the Densité chassis with
all setup information being loaded based on the device location, which can be useful
for both new channels and replacing defective ones
• Provisioning and repair operations can be easily be performed with staff without
broadcast specific training
• Device will robustly continue to operate during temporary loss of connection to GV
STRATUS Playout using previously downloaded playlists or “evergreen” material
• SSP-3801 cards can pull broadcast media from a number of configured locations for
maximum resilience and flexibility
Carriage of ancillary data in clips
The SSP-3801 card can insert vertical ancillary (VANC) data from clips so that data such as
closed captions can be played out in sync with the video. VANC data can be carried in clips
in one of three ways:
• As a SMPTE 436M data track within the MXF
• As VBI lines encoded in the MPEG2 data (SD only - all Sony IMX files carry 16 lines of VBI)
• As ATSC A/53 closed captions within the MPEG2 elementary stream
The card operates with an “outside-in” model for handling vertical ancillary data. All SD
clips must be in the Sony IMX format and will therefore insert the first 16 lines of the MPEG
picture into the VBI space on the output. If ATSC A/53 closed captions are present in the
MPEG2 elementary stream, these will override 608 closed captions carried in the VBI lines in
the MPEG2 picture. If VBI lines are present in SMPTE 436M, this will overwrite the entire line
on the output and will consequently override both the MPEG A/53 closed captions and the
VBI lines in the MPEG2 Picture.
Supported media file formats
The SSP-3801 card supports the following formats. If the media files that you want to use
are not in a supported format, you can use the GV STRATUS Playout File Processing Node to
convert the files and the GV STRATUS Playout Media Import Application to register the
media files as assets in the GV STRATUS Playout service. For more information, see the
“Managing Assets” chapter of the GV STRATUS Playout Operator Guide.
Type Extension Description
Off Air slide OXT Oxtel Still format
Still OXT Oxtel Still format
Voice-over WAV 48kHz multi-channel WAV file (8, 16, 24 or 32 bit)
Note: Floating point PCM data is not supported.
Graphic GMJ Transcoded by the GV STRATUS Playout File
Processing Node
Logo • OXT
• OXA • Oxtel Still format
• Oxtel Animation format