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VN-Matrix 300 • System Conguration 35
Bandwidth Management — Standard Control
Figure 21. Standard Control Area
The Standard control area provides a user with a quick configuration method for the
VN-Matrix 300 encoder.
Statistics for any active streams currently running from the encoder are provided in the
Streams information area.
Conguration for the encoder is made via 3 entries:
z Control Mode
z Image Quality
z Bit rate.
Control Mode
The Control Mode list is a set of 6 modes that are designed to manage the encoded image
data stream by applying different spatial and temporal compression schemes.
NOTE: These control modes are also accessible in the Advanced settings control
area
.
z None — In this mode the compression scheme maintains a constant image quality. The
bit rate will vary dependant on the content. Slowly moving or static image content will
have a lower bit rate than fast moving image sequences. There is no bit rate limiting in
this mode.
z Peak Flow — In this mode, the spatial image quality is held constant. However, a bit
rate limit is applied and maintained by controlling the frame update rate whenever this
limit is exceeded.
z PBR-F — This is a Peak bit rate mode. The spatial quality is held constant until the bit
rate limit is exceeded. At this point, additional spatial compression is applied to keep the
bit rate at the specified limit.
If the content is such that it is not possible to maintain the bit rate limit using only
spatial compression then a different control mode should be chosen or the bit rate limit
should be increased.
z PBR-F (FD) — This mode is as for PBR-F with the addition of dynamic frame rate
management if the spatial compression is insufficient to maintain the bit rate limit.