Chapter 7 VBI
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Ellipse 3000 Release 3.0, Rev. B
VBI Lines (Even Fields and Odd Fields)
7.3
VBI Lines (Even Fields and Odd Fields)
The
VBI Lines
menu displays a list of available VBI lines in the stream. Each VBI line is assigned
with available VBI types. For example, inserting the VBI elementary stream to line 16 allows
inserting a VBI of VPS type (Video Program System).
Each line has odd and even values.
Ellipse supports VBI processing for SD resolution only, MPEG-2 and MPEG-4 AVC. The Ellipse
receives analog VBI over the CV interface and digital VBI over the SDI.
NTSC
option – Lines 5-8 and 22-23 are disabled for NTSC video format. When the Video Format is
set to NTSC, line 21 can insert Closed Caption VBI. Enabling the line sends the Closed Caption
through the Video Header.
Raw Data
option – Raw Data is only available for a CV interface. Raw data is a field designated for
monochrome 4:2:2 samples (ETSI EN 301 775). The monochrome sample data coding is included
in order to manage VBI-information transfer and signaling standards that are not supported by
the unit. The encoder can use the monochrome 4:2:2 mechanisms to encode any single VBI line,
as long as no chrominance information is involved.
When working with an Ellipse unit with both CV and SDI video interfaces, the VBI headers are
currently only supported for the SDI interface.
The supported VBIs are:
■
WSS
■
Teletext
■
VPS
■
CC