evolution 5000 E5780 and E5782 Encoder
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!
Video Bit-rate - the video bit-rate can be set in the
Video
Encoder Menu
. The simple rule is that the higher the bit-rate, the
lower the encoding delay.
4.12
Configuring the Encoder for Minimum Bit-rate
The following parameters can be configured to minimise the video
bit-rate required for a given picture quality:
!
Compression Mode - the Compression Mode option is found in
the
Video Encoder Menu
. For minimum bit-rate this should be set
to standard.
!
Video Bandwidth - the Video Bandwidth option is found in the
Video Source Menu
. To minimise the video bit-rate this should be
set to medium, or better still soft. However, this does affect the
sharpness of the pictures.
!
Noise Reduction - if the noise reduction option has been
purchased, then there will be a Noise Reduction option in the
Video Source Menu
. The higher the level of noise reduction set,
the lower the video bit-rate, but the sharpness of the pictures will
be reduced.
Three new noise reduction levels have been added in SV 3.6.0.
Please refer to the Reference Guide.
!
Video Resolution - the Resolution option is found in the
Video
Encoder Menu
. Selecting a lower resolution reduces the required
video bit-rate, but also reduces the amount of detail in the picture.
In HD certain vertical resolutions do not support different horizontal
resolutions.
!
GOP Structure - the GOP Structure option is found in the
Video
Encoder Menu
.
A new option, “Adaptive GOP”, has been added in SV 3.6.0. Please
refer to the Reference Guide. This option has always been available
in HD mode.
!
Long GOP - if the performance upgrade option has been
purchased, in the
Video Encoder Menu
there will be a Long GOP
which, if set to On, allows GOPs of greater than 0.5 seconds
duration to be selected. Setting a longer GOP may allow the video
bit-rate to be reduced, but at the cost of a longer time to acquire
the service. Also, if a very long GOP is used, the build-up of noise
up to the next I frame may become noticeable.
