DETEXI® Network Video Management System
EXPAND YOUR CONCEPTS OF SECURITY
— Setting up IP-Surveillance System – Hardware Considerations — Network Considerations —
Network considerations include asking the following questions. Answering these questions will help you determine how to integrate the IP Video Surveillance System with the current network —
In a simple configuration with the right conditions, a few-camera system can be placed directly into the available corporate network without affecting the other priorities of the network or compromising the performance of the surveillance system. A configuration such as this typically would assume that only a few cameras are necessary, with only a few clients located inside the network. The more cameras, clients and external clients in the system, the more bandwidth required by the system.
Although it entails more planning, setup and in some cases, more hardware, the preferred configuration is to create a secondary security network to run in parallel with the corporate network.
This configuration allows the IP Video Surveillance System to do its job without pulling resources from the corporate network and vice versa.
This also allows for more strict security policies to be implemented on the security network if desired.
— Setting up IP-Surveillance System – Hardware Considerations — Storage Considerations —
There are several major factors to consider when determining how much storage will be necessary for the IP Video Surveillance System —
— Setting up IP-Surveillance System – Hardware Considerations — Processor Considerations —
When deciding how recording with take place (always or on motion), processor power required for the Network Video Recorder (NVR) should be part of the consideration in addition to storage requirements. Many things come into play when determining processor demand —
When deciding the type of motion sensing to use, one must be aware of the tradeoffs between storage and processor demand. There are often different options for motion sensing which affect the processor in different ways. The two basic types of motion sensing are —
Soft Motion SensingSoft motion sensing requires less hardware because no input devices (motion sensors, light beams, door contacts, etc.) are needed. However, more demand is put on the processor in this case as the processor must constantly analyze the image frames to determine if there is motion.
Region specific soft motion sensing only analyzes specified regions of the image frames to look for motion which may cut down on processor and storage demand.
Hard Motion SensingHard motion sensing will also use less storage. This option will also demand less processor work since the motion sensing is processed externally within the camera. The processor simply needs to monitor the input on the camera and store the images only when the input is triggered. The disadvantage of this option is the requirement, setup, and configuration of extra hardware.
Hard motion sensing may not be as flexible, since soft motion sensing may allow for easy configuration changes or additional features like sensitivity thresholds and regions of interest.
The Number of CamerasThe number of cameras in the system not only impacts the network that the system is on, but also the processor demanded by the NVR. Camera count per NVR server is a major consideration.
For a system with more than 50 cameras, it is often necessary to distribute the load across multiple NVR servers — NVR Domain.
This will vary with systems since the processor load per camera will depend upon the record activity and motion sensing.