Radyne ComStream TIERNAN SE4000, Инструкция по установке и эксплуатации

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Using a Remote Unit SE4000 MPEG-2 Contribution Encoder
4-26 01-0934-401-B
SE4000 Remote Command Descriptions
Remote Command Parameter
Range
Factory
Default
Description
VE LATENCY Quality,
Low_Delay,
Low_Buff, Edit,
Custom
Quality Sets the video compression optimization.
Parameters are:
? Quality = optimizes the video performance
without regard for throughput delay time.
Quality mode is appropriate for action video
scenes such as sports material.
? Low_Delay = reduces the throughput time
required to process a signal from the encoder
input, through the compression process, and
to the decoder output. In low delay mode, the
overall delay through a TE60 to an IRD is 360
ms ±20 ms. In low delay mode, the
compressed audio bit rate is automatically set
to 256 Kbps. Low delay mode is appropriate
for real time news interviews.
? Low_Buff = allows for small buffers.
? Edit = video compression uses only one
frame (no prediction) which makes it easier to
edit the compressed bit stream. Edit requires
a higher data rate to achieve the video
performance of quality mode.
? Custom = allows you to set site-specific video
compression parameters, such as GOP
structure and VBV size. These parameters
must be initially set through a remote terminal
and then saved using the remote CM SAVE
command. Once saved, this custom setup will
persist until the video optimize setting is
changed.
The custom parameter is for experienced users
only. If this option set incorrectly, the video
performance maybe adversely affected. It is
recommended that users consult with Tiernan
Customer Service before using the custom
configuration.
Front panel command equivalent:
Config>Service>Video>Optimize
VE GOP_LENGTH 1 – 126 12 Sets GOP length in custom GOP mode
GOP = (Group of Pictures)
NOTE: GOP adjusting parameters will greatly
affect coding efficiency and picture quality.
Only advanced users should adjust GOP
parameters. Setting GOP LENGTH to a non
even multiple of the GOP will result in poor
video encoding performance
VE GOP I, IP, IPB, IP2B IP2B Sets GOP configuration in custom GOP mode
I = I frame only
IP = I and P frame only – 12 frame IP GOP is
IPPPPPPPPPPP
IPB = 12 frame IPB GOP is IBPBPBPBPBPB
IP2B = 12 frame GOP is IBBPBBPBBPBB
VE PTS_DELAY -1000 to 1000 0 Sets the PTS to PCR video delay.
NOTE: It is possible to set the delay larger than
the available buffer size.