Axis 0268-004 Datový list stáhnout pdf (Strana 62)

General performance considerations

Bandwidth

As there are many factors that affect bandwidth, it is very difficult to predict the required

amounts. The settings that affect bandwidth are:

• image resolution

• image compression

•frame rate

• MPEG-4 GOV settings

• bit rate control settings

There are also factors in the monitored scene that will affect the bandwidth. These are:

• amount of motion

• image complexity

• lighting conditions

For MPEG-4, if there is only limited bandwidth available, and if this is more important

than the image quality, using a constant bit rate (CBR) is recommended. Use a variable bit

rate (VBR) if the image quality needs to be maintained at a higher level. If supported on the

network, consider also using MPEG-4 multicasting, as the bandwidth consumption will be

much lower.

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Axis 0268-004 Datový list Strana 62