Filter
Top Products
UVS-7111 User's Manual
Attachment B: Bandwidth Estimation
Since the FPS is dependent on the bandwidth of the camera, the relationship between the size of an
image le and the bandwidth is always the major concern of the system construction engineer.
The table below shows the relation between the resolution and size of an MJPEG le in the NTSC
system. Please note that the values in the table are for reference only, because the size of an image
le is closely related to the complexity of the environment and the actual situation of the place being
monitored.
Ex.: The transmission speed on the Internet is 2fps under 352 x 240, i.e. 40k*2=80k to 200*2=400k
per second. It is suggested to apply for 512K "upload" bandwidth.
Note
1: What the camera needs at the client end is the “upload” bandwidth. However, most ISPs in
Taiwan provide download bandwidth that is wider than the upload bandwidth. Therefore,
symmetrical bandwidth is a good choice for users who need wider upload bandwidth.
Ex. download/upload = 521K/512K
Note
32 kbps to 64kbps is required for transmission of audio signals.
64
Attachment B: Bandwidth Estimation
176 x 122 (QCIF)
352 x 240 (CIF)
640 x 480 (VGA)
704 x 480 (D1)
20 – 40k bit
40– 200k bit
180 – 400k bit
200 – 530k bit
Image Resolution Average range of Data Sizes