Beward DS03M Operation User's Manual page 21


VBR – the level of quality is in priority and the bitrate value may vary, depending on
different conditions in the surveillance area. In this case the average bitrate value
approaches the value you specify in the "Bitrate" field but the current value may vary
significantly.
Bitrate fluctuate: when you choose CBR, the "Self-adaption" value means that bitrate is
controlled automatically by the system. The values from "±10%" to "±50%" mean that the bitrate you
specify may varies depending on different conditions in the surveillance area, according to these
limits.
Bitrate: set the data transmission speed (the available range is from 30 to 16384 kbit/s). The
higher a bitrate value, the higher image quality, though it requires more network resources.
Frame rate: it is not recommended to set a high frame rate at the low network bitrate.
Otherwise, the objects on the image may move with stops.
I Frame: set the interval of I-frames (the available range is from 1 to 200). The less this
parameter, the higher bitrate and image quality. It is recommended to set the same value as for the
frame rate.
[LAN], [WAN]: these patterns of coding settings allow you to set the recommended values by
one click for LAN and WAN connections.
[LAN]:

main stream: "I Frame" – 50, "Frame rate" – 25 fps, "Rate control" – VBR, "Bitrate" – 2048
kbit/s;

sub stream: "I Frame" – 50, "Frame rate" – 25 fps, "Rate control" – VBR, "Bitrate" – 512
kbit/s.
[WAN]: "I Frame Interval" – 25, "Frame rate" – 5 fps, "Rate control" – VBR, "Bitrate" – 384
kbit/s.
Press the [Save] button to apply new settings.
IP Video Door Station DS03M(P) Operation User Manual
Chapter 7. Config: Video Settings
20