GROUND zero in
this debate is cost. Storage costs a lot – upwards of 40 per cent of the total
cost of system ownership when it comes to video surveillance solutions. And
current numbers indicate that SSD costs three times as much as HDD. The upshot
of this is that it would be quite possible to install an SSD system that cost
as much your HDD-supported entire solution. Yikes.
Of course, SSDs
have good points. Because they don’t have the actuator arm to read the platter
that’s at the heart of an HDD, they read and write to disk faster. This is a
big advantage – especially if you were installing big megapixel cameras and
money was no object.
surveillance application demands a lot of read and storage and you only have a
small storage volume demand there’s no doubt whatever that going SSD will give
you a very noticeable performance boost – especially if you are storing at HD
resolution (720p) or higher.
OVER the past 10
years or so the financial burden of digital storage on the overall surveillance
spend has increased exponentially while at the same time vastly increasing the
usefulness of CCTV systems as investigative tools.
In more recent
times improvements in compression and analytics and falls in the price of
storage are all contributing to a reduction in costs on the one hand while a
shift to HD and megapixel cameras makes greater demands on the other.
Milestone’s Angelo Salvatore, solutions he is involved with show that while
costs are falling users seem to want longer retention times.
compression is improving and storage costs are dropping customers are demanding
longer retention periods which is directly affecting the cost of storage as
part of the overall solution,” Salvatore explains.
organisations in today’s economy see a merger or acquisition as an attractive
business strategy to improve financial position and weather a down market. This
is especially true in the financial services sector, where even very large
organisations are being acquired by equally large organisations as a basic
survival strategy. While the results may favour shareholder value and workforce
efficiency, the impact of combining the IT infrastructure and IT management
processes of two entities can be profound.
In his keynote, Charles Foley urged the industry to accelerate the push toward IP-based surveillance. Foley, chairman and CEO of TimeSight Systems, urged the industry to embrace IP-based technology rather than relying on the “dead horse wisdom” of analog or strict recurring monthly revenue (RMR) models. Foley identified technological trends such as moving a physical security network to an IP backbone, addressing data storage challenges, thinking about video as data, integrating video into larger systems such as access control or IT networks, and implementing cloud-based storage. Sales growth of IP-based equipment is exceeding 15 percent, according to IMS Research statistics quoted by Foley. He also emphasized the importance of working well with IT managers who are now involved in 60 percent of security purchasing decisions.
WHEN electronic security installers get
involved in networked security solutions they’re going to find themselves
facing a host of connectivity devices, the most common of which are repeaters,
especially if the network is employing Cat-5 to get around a relatively large
Repeaters are essential if a larger
network is going to operate effectively. These devices connect different
sections of the cable plant, receiving the signal and pumping it back up to
full strength to combat attenuation caused by cable impedance. This done, the
signal is then sent on its way. Think of repeaters as existing in the physical
layer of a network where they support network media comprising the cable plant.
BEFORE we get
into this one, it’s worth recapping the sorts of wireless networks integrators
and security managers are going to find themselves involved with. The most
common RF designations include:
* 802.11: Applies
to wireless LANs and provides 1 or 2 Mbps transmission in the 2.4 GHz band
using either frequency hopping spread spectrum (FHSS) or direct sequence spread
* 802.11a: An
extension to 802.11 that applies to wireless LANs and provides up to 54 Mbps in
the 5GHz band. 802.11a uses an orthogonal frequency division multiplexing
encoding scheme called COFDM, rather than FHSS or DSSS.
VIDEO surveillance is in the midst of a
revolution that will change the nature of CCTV. But while there’s a lot of talk
about the technology and its benefits, it’s not always easy to pin down the
facts. What percentage of systems installed are IP and which standards will
prevail in the world of networked video? And just what are the keys to high
More than that – just what is an IP
camera? Is it a CMOS-based IP camera delivering 4CIF of H264 compressed video?
Is it a CMOS HD camera working at 1020p? Is it a CMOS-based megapixel camera
delivering a potential image of 16 Megapixels? Or a 3-sensor CMOS Megapixel
camera giving an atmospheric view? Is an IP camera only a full digital camera
or is it a network-enabled analog camera with an onboard encoder? Not
surprisingly, the answers depend on who you talk to.
YOUR customers go with VoIP because it’s inexpensive – very
inexpensive compared to standard phone calls. Trouble is, sharing a space with
VoIP can be a challenge for many alarm systems. The last thing you want is to
install a solution that keeps dragging you half-way across town for constant
VoIP is essentially a process where a phone is connected
to the Internet via a VoIP adapter in the same way any computer gets connected.
This adaptor imitates the way a switched phone line functions but uses the
Internet as the calling path rather than the phone line itself. It’s confusing
in a way because all this is going on across the same piece of copper. The key
is to think of these different paths as being different frequencies on the same
physical copper line, with each frequency having a different bandwidth and
being modulated onto a different voltage.
IF you need to handle video surveillance, video
conferencing and VoIP without going to fibre the most practical and appropriate
cabling solution is a Class F copper cabling solution. This sort of network meet
all demands of a hungry network while providing the lowest risk for the
customer and you as the installation company.
Class F cabling technology is capable of supporting all
the known networking protocols including the forthcoming 10 gigabit Ethernet. A
solid option would be the AMP NETCONNECT shielded twisted pair ACO solution. This
Class F installation is a shielded balanced pair cabling system that is slowly
gaining acceptance in the Australian market place as a future-proofed copper
SO what is H.264 and what are the advantages and
disadvantages of this new compression technology? Essentially, H.264 is a new
video compression scheme which is set to become the worldwide digital video
standard for consumer electronics and personal computers. H.264 has already
been selected as a key compression scheme (codec) for the new optical disc
formats, such as Blu-ray disc.
The intent of the H.264 standard project was to create a
standard capable of providing good video quality at substantially lower bit
rates than previous standards (e.g. half or less the bit rate of MPEG-2, H.263,
or MPEG-4 Part 2), without increasing the complexity of design so much that it
would be impractical or excessively expensive to implement.