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Gigabit
Ethernet Cameras(GigE) |
GigE Vision Standard
GigE Vision is the newest effort at
communications interoperability.
The GigE Vision page provides papers and other
information on the concept and advantages of
using Ethernet compatibility; as well as
information on the progress on the standard.
FAQ
The GigE Vision Standard Committee was formed
in June 2003 to define an open transport
platform based on GigE (Gigabit Ethernet) for
high-performance vision applications. GigE is
the high-speed, 1-Gb/s (gigabit-per-second)
version of Ethernet, the world’s dominant LAN
connection protocol.
The 12-person Committee includes
representatives from every major sector of the
vision systems industry, and is co-chaired by
Toshi Hori, President of JAI-Pulnix and George
Chamberlain, President of Pleora
Technologies.
The GigE Vision Standard will benefit the
industry by:
1) Speeding
time-to-market
The standard will pave the
way for seamless inter-working between hardware
and software products from different companies.
This will greatly reduce the tedious,
time-consuming multi-vendor integration issues
that currently slow down the business.
2) Increasing R&D
resources for customer applications
The standard will dramatically decrease the
number of dollars “siphoned off” from innovation
budgets to build interfaces to proprietary
products. The result? More R&D money for
projects that bring direct value to customers.
3) Opening new
applications markets
By leveraging economical, well-understood
commercial technology – such as GigE switches,
GigE network interface chips/cards, and standard
Cat-5 copper cabling – vision systems will
become more affordable and easier to use.
Reducing the cost and complexity of vision
systems will remove key entry barriers into many
lucrative new business sectors.
The GigE Vision Standard Committee is
committed to a general-purpose GigE standard
that brings value to a wide range of vision
applications, including industrial inspection
and control, medical imaging, intelligent
traffic monitoring, surveillance, digital
cinema, and others.
To accommodate this broad applications scope,
and ensure all industry players benefit, the
specifications are being designed with ample
room for innovation. Individual companies will
be able to optimize products for specific
applications, and differentiate their offerings
from competitors.
FAQ
What is GigE?
GigE is the third generation of Ethernet, the
dominant global LAN standard protocol for
transmitting IP (Internet Protocol) packets
(data, video, voice) over standard IP networks.
The Ethernet standard defines four data rates:
Ethernet (10 Mb/s), Fast Ethernet (100 Mb/s),
Gigabit Ethernet, or GigE (1000 Mb/s or 1 Gb/s),
and 10GigE (10,000 Mb/s or 10 Gb/s). At all
speeds, Ethernet's underlying packet processing
and transmission protocols are the same,
allowing multi-rate Ethernet networks to
inter-work seamlessly.
How does GigE differ
from IEEE 1394 (Firewire)?
1394 allows up to 63 devices to be connected on
one shared bus. The maximum distance between
devices is 4.5 m. The latest version of 1394
(1394b) has 800 Mb/s of total bandwidth, with
512 Mb/s available for image data. All devices
on the bus share this bandwidth, and may thus
have to queue for access, interfering with
real-time operation. By contrast, each device on
a GigE network has a dedicated connection -
there is no queuing for access. The maximum
distance between GigE-connected devices and PCs
and/or switches is 100 m. At 1 Gb/s, GigE has
almost twice the image bandwidth capacity of
1394b.
How does GigE differ
from USB?
GigE is a commercial standard, and USB is
consumer-oriented. USB supports up to 127
devices on a shared bus. The maximum distance
between devices is 5 m. The latest version of
USB (USB 2.0) has a total bus bandwidth of 480
Mb/s. All devices on the bus share this
bandwidth, and may have to queue for access. By
contrast, each device on a GigE network has a
dedicated connection - there is no queuing for
access. The maximum distance between GigE-connected
devices and PCs and/or switches is 100 m. At 1
Gb/s, GigE has more than twice the bandwidth
capacity of USB 2.0.
What is Camera Link®?
Camera Link is a standard managed by the
Automated Imaging Association that defines
bi-directional high-speed links over specialized
cabling between cameras and PCs. The maximum
cable distance is 10 m, and connections are
strictly point-to-point. Camera Link defines
three configurations - base, medium, and full -
with bandwidths of 2,380 Mb/s, 4,760 Mb/s, and
7,140 Mb/s respectively.
How is GigE different
from wireless Ethernet networks?
There are two main differences between wired and
wireless image data transfers: the type of media
used (copper or fiber vs "air"); and speed.
Today's wireless Ethernet networks operate at
less than 100 Mb/s and are half-duplex
connections. The underlying rules for processing
packets in all Ethernet networks are the same.
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Products from 1stVision include firewire 1394 cameras from AVT
Allied Vision Tec USB 2.0 CMOS and CCD cameras from IDS Camera link cameras from
Imperx, GigE and Gigabit Ethernet cameras from Imperx, frame grabbers and
framegrabbers from Dalsa Dalsa-Coreco Coreco , CCTV lens from Fujinon , Tamron ,
Pentax , and Computar , line scan cameras from Dalsa, Genie cameras Gige from
Dalsa Coreco camera link cameras from JAI and Pulnix
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