Axis 213 PTZ User Manual

Axis 213 PTZ User Manual Manual pdf 64 page image

64 AXIS 213 - Technical SpecificationsBandwidthAs there are many factors affecting bandwidth, it is very difficult to predict therequired amounts. The settings that affect bandwidth are:• the image resolution• the image compression• the frame rate• the MPEG-4 object type• the MPEG-4 GOV structure• the audio settingsThere are also factors in the monitored scene that will affect the bandwidth. Theseare:• the amount of motion• the image’s complexity• the lighting conditions.For MPEG-4, if there is only limited bandwidth available, and if this is moreimportant 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 higherlevel. If supported on the network, consider also using MPEG-4 multicasting, as thebandwidth consumption will be much lower.