TANDBERG E5714 DSNG Voyager, Reference Manual, Page: 126 / 314

Operating the Equipment Locally — Video Menu: Vertical Blanking Interval (VBI) Menu
Page 4-48 Reference Guide: E57xx DSNG and DENG Voyager Encoder
ST.RE.E10076.3
VBI In Picture Option
NOTES…
1. The
VBI in Picture option is only accessible if the selected video profile/level is 422P@ML
6
.
2. VBI in Picture transmits the VBI waveform as part of the picture and as such will be subject to
some distortion. Most analogue VBI types are robust against this type of distortion but others,
e.g. video index and ITS, are intended for SDI transmission and will not survive MPEG
coding/decoding in VBI in Picture mode.
This enables the extended picture format available in the MPEG 4:2:2
specification to be selected. When selected, the Encoder compresses and
transmits the VBI data as part of the active picture. This mode requires up
to 3 Mbit/s of bit-rate, depending on the amount and complexity of the VBI
present. It may be necessary to increase the video bit-rate accordingly to
maintain picture quality.
NOTE…
When encoding VBI in this way 3:2 Pulldown should be switched off. If it is not, then occasionally
fields may not be encoded because of the inverse pulldown process. This results in some VBI lines not
being transmitted.
When this option is not selected (or when 4:2:0 format video is used), VBI
data must be transmitted in its original digital form either in an
independent data stream (in the case of Teletext) or in user data fields
within the MPEG video transport stream.
Table 4.35: VBI in Picture Options
Selected Option Description
On VBI is coded as active video.
Off
Off (Bit-rate too low)
Insufficient bit-rate.
VPS (Line 16) Option
This enables or disables the extraction of VPS (Video Programming
System) data from line 16 of the video input.
WSS (Line 23) Option
NOTES…
1.
Aspect ratio changes when WSS is enabled.
2. If the PES Header option in the Video Encoder menu is set to PES per picture, any aspect ratio
changes will be signalled frame accurately.
This enables or disables the extraction of WSS (Wide Screen Signalling)
data from line 23 of the video input. The WSS format can either be in
accordance with ETSI 300 294, or can be in the proprietary WSS-AFD
format.
6
4:2:2 is only available when software option M2/ESO2/422 is purchased.