TANDBERG Voyager E5784, Справочное руководство

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Operating the Equipment Locally — Setup Menu: Video Menu
Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder Page 4-43
ST.RE.E10137.3
Table 4.34: Compression Mode Options
Selected Option Description
Seamless 1
Seamless 2
Seamless 3
Seamless 4
This gives a fixed delay which allows the bit-rate to be changed, over the permitted range, without
a break in transmission.
Seamless 5
Seamless 6
In the following modes the delay is a function of the bit-rate selected. If the bit-rate is changed
there is a break in transmission.
Standard The normal mode, with no special techniques or fixed settings to reduce encoding delay.
Low Delay Delay is reduced by reducing the size of the video rate buffer. This compromises video quality in
some circumstances.
Very Low Delay
SD Only Delay is reduced using the same techniques as Low Delay mode. GOP structure used is IP and field
pictures are used (ie B frames are not used)..
Mega Low Delay
SD Only The generated transport stream is not fully DVB compliant and may not work with all Decoders.
Table 4.35: Seamless Mode Bit-rate (Full Resolution Only)
Profile Seamless 1
(Mbit/s)
Seamless 2
(Mbit/s)
Seamless 3
(Mbit/s)
Seamless 4
(Mbit/s)
Seamless 5
(Mbit/s)
Seamless 6
(Mbit/s)
4:2:0 (SD) 0.8 - 10 1.5 - 10 2 - 15 0.4 - 10 1 - 12 1.3 - 10
4:2:2 (SD) 1.5 - 13 3 - 27 5 - 33 0.7 - 10 2.1 – 2.5 2.5 - 20
1080 420/422 (HD) 7 - 25 7 - 50 7 - 60 7 - 20 7 - 50 7 - 60
720 420/422 (HD) 4 - 25 5.5 - 50 6.5 - 60 4 - 20 5 - 50 6.5 - 60
Rate Buffer delay 2.5 s 1.2 s 1 s 3.3 s 1.3 s 1 s
Seamless 1 This would be used for 4:2:0 DTH statistical multiplexing
applications. The Encoder delay is approximately 2.5 seconds.
Seamless 2 mode emulates System 3000 6U and 6U+ Encoders delay.
Actual minimum and maximum rates depend on video standard and
resolution.
Seamless 3 Would usually be used in 4:2:2 statistical multiplexing
applications. The Encoder delay is approximately 1.1 seconds.
Seamless 4 mode has a very low B
min
. Actual minimum and maximum
depend on the video standard and resolution. This mode would typically be
used for 4:2:0 DTH statistical multiplexing applications.
Seamless 5 mode minimum and maximum depend on the video standard
and resolution.
Seamless 6 mode is typically used with 4:2:2 statistical multiplexing and
a low B
min
. Actual minimum and maximum depend on the video standard
and resolution.