Introduction, Vbi in picture – TANDBERG E5714 User Manual
Page 21
Introduction to the Basic Encoder
Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder
Page 1-13
ST.TM.E10076.3
Table 1.6: Dolby Digital Audio Encoding Bit-rates
Bit-rate
(kbit/s)
Single Channel
Mono (1/0)
Dual Channel
Stereo (2/0)
56
3
-
64
3
-
80
3
-
96
3
3
112
3
3
128
3
3
160
3
3
192
3
3
224
3
3
256
3
3
320
3
3
384
3
3
448
3
3
512
3
3
576
3
3
640
3
3
1.3.3
Vertical Blanking Interval (VBI) Line Processing
Modes
Introduction
The Encoder has three modes for processing VBI lines.
NOTE…
A maximum of eight VBI lines per field may be extracted. This limit does not apply to Teletext.
VBI in Picture
By selecting the VBI in Picture extended active picture format available in
the MPEG 4:2:2 specification the Encoder compresses and transmits the
VBI data as part of the active picture. This mode requires up to 3 Mbit/s of
extra bit-rate, depending on the amount and complexity of the VBI
present.
NOTES…
1.
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, are intended for SDI transmission and will not survive MPEG coding/decoding
in VBI in Picture mode. VITS test signal and ghost cancellation signal will become corrupted.
2.
VBI in Picture is not supported when 3:2 Pulldown is active.