Radyne ComStream TIERNAN SE4000, Инструкция по установке и эксплуатации

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SE4000 MPEG-2 Contribution Encoder Using the Front Panel
01-0934-401-B 3-15
Front Panel Menu Summary
Command Function Options/Response Format
Latency Sets the selected optimization
mode
Note: The custom parameter is
for experienced users only.
Changing custom optimization
features requires advanced
knowledge of MPEG
compression theory and
encoder commands, and, if set
incorrectly, the video
performance maybe adversely
affected. It is recommended
that users consult with the
Radyne ComStream customer
Service Department before
using the custom
configuration.
? quality – optimizes the video performance
without regard for throughput delay time.
Quality mode is appropriate for action video
scenes such as sports material (default).
? low-buffer – compensates for undersized
decoder buffers.
? 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 SE4000 to an IRD is
180 ms ± 40 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.
? 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 the user 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 through a remote
terminal, this custom setup will persist until the
video optimize setting is changed.
The custom parameter is for experienced users
only. Changing custom optimization features
requires advanced knowledge of MPEG
compression theory and encoder commands,
and, if set incorrectly, the video performance
maybe adversely affected. It is recommended
that users consult with the Radyne ComStream
customer Service Department before using a
custom configuration.
PTS Delay Sets the video delay +1000 to –1000 ms adjustable in 1 ms increments
GOP Length Displays the GOP length – in
custom mode sets the GOP
length
GOP (Group of pictures) variants allow for
adjustment of encoding parameters to optimize for
various uses. (see the latency settings above).
Custom GOP parameter settings may not work with
all IRDs and may adversely affect Encoder
bandwidth efficiency.
GOP Structure Displays the GOP Structure – in
custom mode sets the GOP
Structure.
GOP parameters should only be changed by
advanced users in special circumstances.