Network Setting

Network Requirements

●Ensure that there is sufficient network bandwidth for the data volume to be sent out by the camera. Do not send multicast stream that exceeds the bandwidth. If the entire bandwidth is used by the multicast stream, control of this camera via the network may fail.

●Data volume to be sent by the camera varies with the settings and number of distributions.

●The maximum bit rate for transmission is about 20 Mbps.

Estimation of Total Bit Rate

The total JPEG bit rate from the camera is determined by the camera settings, number of clients, and the client’s requested number of frames. The total MPEG4 bit rate from the camera is determined by the number of distributions. Develop a design upon taking the above into consideration.

Bit Rate of JPEG Stream

The JPEG file size per frame varies with the encoding settings as well as input video signals. The following table may be used as a reference.

AFS (Average File Size)

When AFS is selected, encoding will be performed such that the target file size is the average size of multiple JPEG images.

Selectable between 10 KB

Selectable between 3 KB

to 100 KB

to 33 KB

 

 

VFS(Variable File Size)

When VFS is selected, the quantization table during JPEG encoding will be maintained, and the file size will increase/decrease according to the input signals.

 

 

VGA

QVGA

 

 

 

 

1

(High)

80 KB

27 KB

 

 

 

 

2

 

60 KB

20 KB

 

 

 

 

3

 

40 KB

13 KB

 

 

 

 

4

 

30 KB

10 KB

(Medium)

 

 

 

 

 

 

5

 

25 KB

8 KB

 

 

 

 

6

 

20 KB

7 KB

 

 

 

 

7

(Low)

15 KB

5 KB

 

 

 

 

The maximum number of distributions varies with the bit rate settings as well as the client’s requested frame rate. Up to 20 streams can be distributed (including multicast). The total frame rate refers to the sum of these frame rates.

For example, when 10 fps is requested by two clients, and in addition, multicast is transmitted at a rate of 10 fps, the total frame rate will be:

10 +10 +10 = 30 fps

If the JPEG file size per frame is 30 KB, then the total bit rate will be:

30 KB × 30 fps = 900 KB/s = Approx. 7.2 Mbps

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