JVC VN-H657U, Инструкция по эксплуатации

Страница: 18 / 98

Operating Environment
Recommended Computer
Specifications
OS : Windows 7 Professional (SP1),
Windows XP Professional, or
Home Edition (SP3)
CPU : Intel Core i5 3 GHz or higher
Memory
capacity
: 2 GB and above
Free hard
disk space
: 512 MB or more
Display and
video card
: 1920 ´ 1080 pixels or higher, True
Color (24 or 32 bits) VRAM 1 GB
or more recommended
Web browser: Internet Explorer Version 8.0,
Version 9.0
Note :
0 Operation is not guaranteed for web browser
other than the Internet Explorer versions stated
in the recommended PC specifications.
0
The Built-in Viewer consists of a software
component called ActiveX. The ActiveX is
usually installed when the Built-in Viewer is used
for the first time. However, installation may be
rejected depending on the anti-virus software
settings. If this occurs, change the settings of the
anti-virus software.
0 The camera image may not appear smooth at
times due to factors such as fluctuations in the
CPU and memory load, or network jitter. This is
not a malfunction.
The symptoms may improve when the camera
settings are changed.
(
A
P45 [[Encoding] Page] )
LAN Environment
0
10BASE-T/100BASE-TX network
interconnected using devices such as an
IEEE802.3-compliant switching hub.
0
IEEE802.3at-compliant switching hub when
PoE plus is used
0
IGMPv2-compliant network when multicast is in
use.
Network
0
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.
0
Data volume to be sent by the camera varies
with the settings and number of distributions.
0
The maximum bit rate for transmission is about
40 Mbps.
0
Supports up to 20 clients at the same time.
Frame Rate and Frame Size
This products enables simultaneous encoding up
to three channels. However, the settable frame size
and frame rate combinations are subject to
restrictions.
For more details about restrictions on the
combination, refer to the following.
(
A
P92 [Appendix (Restrictions during
Multi-encoding)] )
Bit Rate of JPEG Stream
The JPEG file size per frame varies with the
encoding settings as well as the camera images.
When “AFS” is selected, encoding is performed
such that the target file size is the average size of
multiple JPEG images. When “VFS” is selected,
the quantization table during JPEG encoding will
be maintained, and the file size will increase/
decrease according to the camera images.
If the JPEG file size per frame is 120 KB, then the
total bit rate will be:
120 KB
´
15 fps = 1800 KB/s = Approx. 14.4 Mbps
When “Multi-Encode” is selected, a different JPEG
file size can be set for each channel.
For example, when 2fps JPEG files with 30 KB file
size and 3fps JPEG file with 10 KB file size are
transmitted, then the total bit rate will be:
30 KB
´
2 fps +10 KB
´
3 fps = 90 KB/s = Approx.
0.72 Mbps
18
Operating Environment
Camera Setting Requirem
ents