Thompson ViBE EM4000, User Manual

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Chapter 4 ’Web Browser Interface’ — Settings
ViBE EM4000 — Release 1.10 79
User Manual — 46073586AB02
Click HD VBI to display the HD VBI configuration page.
Figure 4-28. Editing an HD video component - VBI page
This page is used to set HD video component VBI parameters.
Closed GOP Used to enable On or disable Off Closed GOP mode:
Closed GOP mode is used to break temporal
dependency between GOPs. This requires
systematically encoding a P picture before each I
picture in temporal order. This mode reduces encoding
quality and should only be used when stream editing
operations are expected.
Note: When Closed GOP is used, the effective GOP size
is enlarged by one picture to handle the additional P
picture used to close the GOP.
PVR Descriptor Used to enable On or disable Off insertion of
AU-information in the MPEG Transport Stream
adaptation field.
Time Code This parameter determines whether the Time Code
information should be sent
On or not sent Off in the
MPEG video component. After extraction from the
digital field blanking, the Time Code is sent in the
encoded video component as a picture timing SEI
message.
Closed caption In 59.94 Hz mode, this parameter determines whether
the
closed caption information, extracted from the
digital field blanking, should be sent On or not sent Off
in the encoded video component as a picture timing SEI
message.
Changing this parameter stops the outgoing
video signal for approximately 5 to 10
seconds.