Tài liệu IP Video Security Guide: Global Leaders in Video and Security Systems pptx

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About Pelco
2.0
About Pelco
Pelco is a world leader in the design, development and manufacturing of video and
security systems and equipment ideal for any industry. With a long and prestigious history
of offering high-quality products and exceptional customer service, Pelco has become the
most sought-after product supplier in the security industry. Operating from the industry’s
largest manufacturing complex, Pelco produces the most respected offering of discreet
camera domes, high speed camera positioning systems, and enclosures, megapixel
cameras, video matrix systems, next-generation digital video recorders, IP solutions, fiber
optic transmission systems for video/data – and much more.
Respected as a major product innovator, Pelco also manufactures a large number of
specialized security components, including explosion-proof and pressurized camera
enclosures, high-security housings, and thermal imaging pan-tilt-zoom positioning
systems. Pelco produces the industry-acclaimed Spectra, Camclosure, Endura, Sarix,
and Digital Sentry product lines.
In addition, Pelco demonstrates its commitment to being an Open Source Systems
Provider with successful integrations and partnerships in such areas as Electronic Access
Control, Video Analytics, Central Station Alarm and Video Monitoring, Cellular Phone-
Video Monitoring, Command and Control, Mobile Digital Video Recording, Point of Sale
and Loss Prevention Systems. Pelco constantly strives to maintain its position as the most
reliable manufacturer in the security industry. And to that end, the company offers an
impressive array of customer service programs, including Guaranteed Ship Dates and
24-Hour Technical Assistance to name a few. Above all else, Pelco attributes its continued
success and growth to the company’s ability to provide courteous, on-time service and
dependable products.
From its impressive manufacturing facility located in Central California and through a
responsive global network of professional sales representatives, Pelco continues to offer
new technologies, products, and services that constantly confirm the company’s position
as the premier security systems and equipment manufacturer and strongest end-to-end
player in the security market.
   Benets of Video Over Network
3.0
With ever-more-powerful networks, growing bandwidth capabilities and advances in
video compression algorithms, delivering professional-level security solutions over IT
infrastructures is a reality like never before.
And Pelco is leading the way.
Leading the way with cutting-edge technologies and products. Leading the way with an
unparalleled understanding of the challenges of video over IP. And leading the way with
more than twenty years dedicated to delivering solutions specifically designed to meet the
needs of security professionals.
Why Video Over IP
The ability to view high-quality, full-frame-rate video via IP opens a world of opportunities
for today’s security professionals. In addition to the convenience of leveraging existing
network infrastructures, video over IP can provide greater control, enhanced operational
flexibility, improved administration, and expanded recording, archiving, and integration
capabilities over traditional analog video security systems.
With greater responsibility being placed on IT professionals to provide a platform for the
deployment of video security on a company’s network, it is imperative that solutions and
technologies are available that provide the high level of security demanded without adversely
impacting the network itself.
It is also imperative that network video security systems allow IT administrators to deploy,
manage, and maintain their video security components at the same level and detail expected
from advanced network appliances without compromising network integrity. By employing
advanced open source network protocols, security measures, and bandwidth management
tools, Pelco IP video security products are designed to be the building blocks of reliable
advanced network video security systems.
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Leading the way with cutting edge technologies and products. Leading the way with an unparalleled
understanding of the challenges of video over IP. And leading the way with more than twenty years
dedicated to delivering solutions specically designed to meet the needs of security professionals.
Pelco Knows Security
For more than twenty years, Pelco has been dedicated to designing, developing and bringing
to market tailored solutions for video security professionals. We understand security, its
challenges and its opportunities as no one else can. We understand it because it is who we
are. Pelco is security. From our earliest pan-and-tilt mechanisms to today’s industry leading
Spectra IV IP network camera positioning systems, Pelco consistently listens to our customers
to develop those products that address their needs. It has been our core philosophy for more
than twenty years and it will continue to drive us for the next twenty and beyond.
It is specifically because of such an approach that Pelco consistently delivers solutions that
are thoroughly developed, tested and ready for immediate deployment. The results speak
for themselves. Trusted to safeguard installations around the world – from commercial,
industrial, financial and other institutions to our nation’s – and the world’s – most treasured
landmarks – Pelco is uniquely positioned and dedicated to delivering the results you demand.
Pelco Knows Security Over IP
Because of our understanding of the ever-evolving demands placed on security installations,
Pelco is uniquely positioned to deliver cutting-edge network-based solutions and
technologies. From high-resolution image quality and full frame-rate video to a clear
understanding of bandwidth constraints, storage requirements and more, Pelco continues to
broaden the market’s understanding of what security – and IP-based security – can mean to
your unique application.
A Simple Question
While many applications are demanding the flexibility and performance of network-based
technologies, at the end of the day you need to be able to answer a rather straightforward
question: Has the system you invested in, whether a single network camera or a complete
end-to-end solution, enhanced your security?
To answer this question several factors must be taken into consideration when designing and
deploying a network-based video security system. More than an IP camera manufacturer,
Pelco is a trusted security company that designs and develops complete, end-to-end network-
based, hybrid, and analog video security systems. And because of this philosophy, Pelco has
carefully designed and developed our products with security in mind.
Benets of Video Over Network
3.1









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Your Partner Every Step Of The Way
Pelco understands that your security is much more than a network camera. And we know
that there is a lot of information to digest. That is why for more than ten years, Pelco has
dedicated itself to helping educate the industry that it serves through the Pelco
Global Training Institute.
On a daily basis, PGTI hosts IT integrators, administrators, dealers, end users and others
for free training in video security at Pelco headquarters. From product and technology
overview to in-depth network security and certification classes, PGTI is a unique asset only
Pelco can offer to help you succeed in the deployment of video security systems. Combined
with online e-learning courses, global field trainers and more, PGTI is an essential resource
for anyone who wants to learn about and better understand the unique demands of
network-based video security.
Only one company can offer you this unmatched combination of technologies, products and
solutions. Only one company can deliver the camera technology you demand, the complete
suite of network systems you need and the expertise, experience, service and support you
should expect. Only one company. Only Pelco.
3.2
Benets of Video Over Network


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Introduction to Network
Video Security
4.0
The video security industry has been in the process of transitioning from a mechanical,
analog system of video recorded on VCR (Video Cassette Recorder) tapes to a dynamic,
digitized system of video stored on a network. The first stage of this evolution was the
replacement of the VCR by the DVR (Digital Video Recorder). The cameras were still
analog but the storage device was digital.
DVR/NVR
The DVR introduced video stored to hard disk rather than individual VCR tapes or magnetic
tape libraries. This reduced the footprint of the video storage system in many large
corporations that were using tape libraries or carousels. With the DVR came many benefits of
digitized data to the security industry such as better video compression algorithms, increased
video quality, dynamic video searching, increased storage capacity resulting in longer
retention of video, concurrent real-time viewing and playback capability, decentralized
viewing from anywhere on the network, and best of all, no one had to change the VCR
tapes. A Network Video Recorder or NVR is an internet protocol based device that sits on
your network. With the ability to record IP and analog cameras, DVRs and NVRs (Network
Video Recorders) offer freedom of choice in security networks design and configuration,
while protecting the investments made in current infrastructure. Based on open source
architecture, Pelco IP-based DVRs and NVRs are enabled to record, manage, and configure
multiple live-streams simultaneously.
Disk Systems
The key factor in any video security system is reliability. Disk technology has evolved over
the past decade and become very stable. VCR tapes could store a limited amount of video,
although the quality would degrade over time. DVR and NVR system hard drives can reliably
store days of video as opposed to hours (For VCRs) depending on the video resolution
and compression algorithm. A DVR or NVR with an attached RAID (Redundant Array of
Independent Disks) increases storage capacity by combining multiple hard drives in a single
chassis resulting in a mass storage system.
RAID
Security systems start with recording video and end with playback. If the storage in a
video security system fails, the entire system fails. This is why the security industry has
implemented RAID as a standard component in the security system. RAID systems have
features that can include dynamic hot swappable drives, scan/recovery capabilities,
hot spare drives in the chassis, and redundancy.




















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The video security industry has been in the process of transitioning from a mechanical, analog system of
video recorded on VCR (Video Cartridge Recorder) tapes to a dynamic, digitized system of video stored on a
network. The rst stage of this evolution was the replacement of the VCR by the DVR (Digital Video Recorder).
Real-Time Storage and Archive
Storage systems comprise of more than just the hard drives. NAS (Network Attached
Storage) uses the flexibility of the network to make high capacity storage available
directly from the network. An alternative technology of SAN (Storage Area Networks)
attaches high capacity storage to its own dedicated high speed network, access to which
is gained through a server. The impact of the additional parts of the storage system must
be considered when assessing their suitability for video security storage. These storage
systems have evolved as a result of the needs of data applications. The needs of a video
security storage system are somewhat different.
In a typical data system access to the storage is sporadic and consists of typically 50%
write access and 50% read access with total utilization being perhaps less than 50%. In
a video system the volumes of data are significantly higher and the read/write cycles are
very different with often 100% write and very sporadic read. However when read access is
required it often needs very rapid access to significant amounts of data without excessive
search times which will disrupt the displayed video. In addition security systems often need
access to data almost as soon as it was written. Some RAID technologies help significantly in
improving read/write access times as well as enhancing reliability, but applying this through
NAS or SAN connections can cause limitations in throughput and search times that cannot
sustain video security systems.
In reality DVRs and NVRs are primarily very specialized storage systems that can record
and replay the vast amounts of data within the very critical constraints of a real-time
security system.
There are clear financial and management benefits in having a large storage farm used
for many applications – parallels to the benefits of sharing the network between many
applications. However this must be assessed against the over-riding criteria of a new security
system – does it enhance your security? There are three ways of sharing storage farms while
still maintaining appropriate performance from the security system.
1. Limiting the use of any shared NAS/SAN to fit within the security performance criteria,
and giving priority to video. This approach may remove any financial benefit from using
a shared resource.
2. Using a dedicated NAS/SAN that performs within the required criteria.
3. Using dedicated storage within the DVR/NVR for a limited period – perhaps 5 days – and
then archiving older video to a NAS/SAN.
4.1
Introduction to Network Video Security

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This last option gives the benefits of high speed and reliable access to recent video while
taking advantage of the cost savings by using a storage farm for the video that is not needed
for instant access.
NAS
The issues surrounding video storage technologies and storage capacity are the fragility of
the drive system. Hard drives are very susceptible to environmental influence. Heat, dust,
and vibration are all factors that can cause a hard drive to fail.
NAS (Network Attached Storage) and SAN (Storage Area Network) technologies can address
some of these issues but at a much higher cost. NAS is a specialized storage device (or
group of devices) that attach to the network and provide fault tolerant, centralized network
storage, which is easily expandable without reconfiguring the existing storage. The primary
difference between a NAS and RAID storage system is that NAS interfaces directly with the
network while RAID storage requires a device/server to which it is attached. This device/
server attaches directly to the network. NAS has only one function, to store and retrieve data,
and is faster because it has reduced latency due in part to the direct network connection. The
network clients request data stored on a NAS device through their network file server.
SAN
SAN networks are very expensive but if your industry has high compliance requirements, this
may be the best system to implement. Banks, hospitals, resorts, government agencies and
large enterprise networks use Storage Area Networks to protect the integrity and availability
of their data. SAN networks are based on a fiber channel architecture that is extremely fast,
operating at transmission speeds of 1Gbps or higher. All components in a SAN are fully fault-
tolerant, guaranteeing the availability of the data even if a component of the SAN fails.
As with any well-designed distributed network, any SAN device has a communication
path to all other devices on the network similar to a mesh topology. That is the greatest
benefit of an IP-based, converged network. All IP-based traffic utilizes the same physical
network infrastructure, leveraging the cost of cable plant, network storage, and IT staff.
Digital solutions cost more initially and require a much higher level of expertise to design,
implement, and maintain the integrity of the network.
The return on investment is the flexibility, scalability, security, and fault-tolerance of the
design. If surveillance history is a requirement of your industry, then an IP network solution
is the most cost effective solution over time.
Introduction to Network Video Security
4.2




















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Quality of Service
Quality of Service (QoS) provides a software-based ability to guarantee the required
level of network resources for priority or real-time traffic. QoS is a major performance
factor for network administrators as a growing number of non-traditional devices
are deployed on the network such as phones, cameras, access control, and building
environmental or security systems. QoS provides the ability to control access to available
network resources, reserving bandwidth for specific traffic. A delay in the transmission
to lower the current temperature of a room to a network-based HVAC system is not as
critical as real-time video streams from a security camera or the voice traffic of an IP
phone system.
The network administrator can prioritize the traffic types by service (known as
Differentiated Service (DiffServ)), each of which requires different levels of access
to network resources. With significantly varied types of services being delivered on
the network, it is no longer feasible to rely upon First-In-First-Out (FIFO) technology.
In a network that supports IP based video security, every switch that transmits the
video traffic should be capable of implementing QoS, not only to provide a guaranteed
throughput for the video, but to allocate bandwidth for all other services on the network.
Without QoS, network performance could suffer from the impact of constant streams
of IP video degrading the overall network performance, while other services no longer
receive their required minimum level of resources.
4.3
Introduction to Network Video Security

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   
There are clear nancial and management benets in having a large storage farm used for many
applications parallels to the benets of sharing the network between many applications. However this
must be assessed against the over riding criteria of a new security system does it enhance your security?
Security
An analog camera transmission is always unsecured. An IP camera attached to the network
as an independent node transmitting network based video can be secured end-to-end.
This is a prevailing network best practice for transmitting sensitive data using open source
protocols. Many of the features that can enhance the security of a video security network
are current best practices in the data network world. IT technologies have standards and
practices that can be transparently applied to video transmitted from an IP camera that
supports those protocols and applications.
Helping the world’s businesses keep their buildings, employees, and customers safe
and secure is a fast-growing industry. The key security control systems in use today
are intrusion detection, access control, and video surveillance. If each of these systems
is managed separately, training, maintenance, and administration could become an
expensive burden to a company.
Integrated IP network systems are quickly taking over this market because they reduce
costs, simplify access and delivery, leverage existing infrastructure, and improve the overall
security of physical and logical property. IP-based security enables businesses to broaden
their security objectives by providing a single user interface into all physical structures.
Pelco’s IP-based security solutions support the ability to manage all facilities and remote
sites from a single computer, anytime, anywhere. An IP-based control environment supports
centralized administration which provides flexibility, programmability, and reduced
complexity, which in itself, increases security overall.
The meaning of “state of the art” security is changing from a collection of separate processes
and devices aimed at guarding facilities or intellectual property to becoming a convergent
technology. The integration of security systems, building management systems, and IT
systems, increase return on investment by providing a solution at the application level.
Introduction to Network Video Security
4.4















Video Formats
5.0
NTSC/PAL
NTSC/PAL (National Television System Committee/Phase Alternating Line) are Standard
Definition (SD) analog color television standards. For security cameras, NTSC is the color
standard used when the power line frequency is 60Hz. The equivalent monochrome
standard is EIA (Electronic Industries Association) but most security solutions use NTSC
interchangeably for both color and monochrome. If the security system power line frequency
is 50Hz, the color standard is PAL (Phase Alternating Line) and the monochrome standard is
CCIR (Consulting Committee for International Radio) (like NTSC, PAL is often used to refer
to both). This means that most of the western hemisphere uses NTSC for analog television
and video security systems, while most of the eastern hemisphere including Europe uses PAL.
Standard Definition broadcast television uses these standards also but there are more
transmission standards that the security industry does not use. Most security cameras
have the ability to develop their own synchronization independent of the power line
frequency. When set to internal synchronization, a PAL camera will produce an acceptable
picture when powered at 60Hz. The same is true for NTSC cameras at 50Hz. Most analog
monitors auto-sense the input and will display PAL or NTSC. Digital systems such as the
Pelco Endura architecture auto-sense the format.
CIF
CIF (Common Intermediate Format) defines the picture size to be used in video teleconferencing.
CIF resolution is defined at 352 pixels horizontal by 288 pixels vertical. 2CIF is 704x288 and
4CIF is 704x576 and there is even QCIF at 176x144 and smaller. These formats are defined in the
ITU-H.261 standard as being optimal for converting NTSC/PAL analog raster graphics to digital
pixel graphics. Some security system video properties will display at a resolution identified as
“4SIF”. Source Input Format (SIF) is essentially the same thing as CIF (352x240) but it came
from the MPEG (Motion Picture Experts group) standard rather than the ITU (International
Telecommunication Union) standard.