TANDBERG E5780, Справочное руководство

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Operating the Equipment Locally — Video Menu: Video Encoder Menu
Reference Guide: evolution 5000 E5780 and E5782 Encoder Page 4-31
ST.RE.E10135.4
Table 4.12: [HD] Video Encoder Menu Option Descriptions
Selected Item Options Description
422P@ML 4:2:2 Profile @ Main Level. Typically used in 4:2:2 contribution feed.
2
MP@HL Main Profile @ High Level. Typically used in HD 4:2:0 direct-to-home.
Profile/Level:
This option enables the
Profile/Level to be set.
MP@ML Main Profile @ Main Level. Typically used in 4:2:0 direct-to-home.
Seamless 1
Seamless 2
Seamless 3
Seamless 4
Seamless 5
Seamless 6
This gives a fixed delay which allows the bitrate to be changed, over the
permitted range, without a break in transmission.
In the following modes the delay is a function of the bitrate selected. If
the bitrate 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.
Compression Mode:
Selects various compression
modes in which some
encoding parameters are
automatically controlled
depending on the selected
encoding delay.
CAUTION…
Changing compression sometimes causes a change to GOP structure and length.
Picture quality may decrease with reduced delay.
Profile (Full
Resolution Only) 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.
In Seamless
Modes 4, 5 and 6
coding
performance is
compromised a
little to achieve
lower B
min
s.
Encoding
2
4:2:2 is not available unless the M2/ESO2/422 or M2/ESO2/HD422 (E5782) software option is enabled.