Axis Network video Spezifikationen PDF herunterladen (Seite 107)

107

Bandwidth and storage considerations

Network bandwidth and storage requirements are important considerations when

designing a video surveillance system. The factors include the number of cameras,

the image resolution used, the compression type and ratio, frame rates and scene

complexity. This chapter provides some guidelines on designing a system, along with

information on storage solutions and various system congurations.

12.1 Bandwidth and storage calculations

Network video products utilize network bandwidth and storage space based on their congura-

tion. As mentioned earlier, this depends on the following:

> Number of cameras

> Whether recording will be continuous or event-based

> Number of hours per day the camera will be recording

> Frames per second

> Image resolution

> Video compression type: Motion JPEG, MPEG-4, H.264

> Scenery: Image complexity (e.g. gray wall or a forest), lighting conditions and amount of

motion (oce environment or crowded train stations)

> How long data must be stored

12.1.1 Bandwidth needs

In a small surveillance system involving 8 to 10 cameras, a basic 100-megabit (Mbit) network

switch can be used without having to consider bandwidth limitations. Most companies can

implement a surveillance system of this size using their existing network.

BANDWIDTH AND STORAGE CONSIDERATIONS - CHAPTER 12

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 119 120

Keine Kommentare

Axis Network video Spezifikationen Seite 107