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Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page 4-47
ST.TM.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.
To access the VBI in Picture option, press the VBI in Picture softkey in
the VBI Menu. 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 4.41: 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
NOTE…
This option is only available when Frame Rate is 25 Hz.
To access the VPS (Line 16) option, press the VPS (Line 16) softkey in
the VBI Menu. This enables the extraction of VPS (Video Programming
System) data from line 16 of the video input. The option can be turned On
or Off.
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4:2:2 is only available when software option M2/ESO2/422 is purchased.