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IP-based MPEG4 Surveillance System with DVR
•Introduction
Are you ready to purchase a professional DVR Surveillance system for your
application? For a suitable industrial-grade DVR system,here are many of systems
to choose from, and a myriad of features need to investigate. How do we tell the
differences between them? The following hints are what you must consider in the
first place.
•Embedded based DVR
DVR surveillance systems may be categorized as being either PC based or
Embedded. A PC based DVR surveillance system is a classical PC with
video capture cards designed to capture video and/or software compress video.
A Embedded based DVR surveillance system is specifically designed as a hardware
compress digital video recorder with its operating system and DVR software
embedded in firmware or read only memory. The ability of the PC to handle the DVR
requirements of performance and functionality including multi-channel video
display, record, playback, network remote surveillance and setup has made itself
invaluable. Also, the open PC architecture can let users easily build the DVR
systems and interface variations of the peripheral devices.However the PC/size
dimension with the KB/MOUSE/VGA display plus Windows OS make it's difficult for
use in the extended temperature rugged industrial environment.The Embedded
based industrial-grade DVR surveillance system especially suitable for outdoors
and harsh environments, such as Roadways, Refineries,and Power Plants . |
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•Embedded Linux OS
Typically, the only user interfaces for DVR systems are usually through customized user interface or the Internet Explorer browser.
However, using Linux doesn't need direct interaction with the end user, making the user's unfamiliarity with Linux irrelevant. Linux
can remove extraneous code and potential security vulnerabilities, fine tune the services needed on the DVR system to optimize system
performance, and then fit into very small storage as a ready-made DVR system. As a result, Linux-based DVRs can be stored
in a read-only flash memory rather than on the recording hard-drive. The system will automatic notify administrator when hard-drive
crash because your DVR is operational even if there's a problem with hard-drive. Therefore, the stability and reliability can be
enhanced. Also , Linux is the benchmark when it comes to system performance, reliability and security , especially in the area of
networking.
•MPEG-4 compression
There are several kinds of compression standards, including Motion JPEG, MPEG-2, MPEG-4 and Wavelet,available for DVR systems.
Because of the need to store long periods of video clips on limited Hard-Disk space, DVR system require compression technologies that
optimize image compression but have a negligible affect on image playback performed at the same time. According to several market
surveys,MPEG-4 codec is considered the mainstream compression format for DVR systems because it has the highest compression ratio
of the MPEG standards and can also support audio compression. H.264(MPEG-4 Part 10) is a new standard with differential algorithm that
may replace MPEG-4 as the industry standard in the future .
•Others
In addition, when choosing a DVR system one should keep in mind the situation in which it will be used. Will it be used for security
surveillance in industrial automation, airports, or museums? Or will it be used in areas that require real-time remote/centralize high-speed
recording such as unmanned locations? To proper address video high-quality/resolution, recording speed, storage capacity, and remote
access for those applications, DVR can offers convenience and smart features far beyond that which analog technology is capable of
providing.
•Summary
For a professional Embedded-based DVR surveillance system, everything you need is setting IP of Sanyan's Encoder/Decoder Server,
connect various video cameras feeds and Ethernet with other standard cables, and its up and running in a short time. Sanyan's embedded
Linux DOM (Disk on Module) plus 2.5" Hard-disk DVR with maximum reliability and stability, offers a range of customization, features and
all the benefits mention above, is your best choice of a professional networking DVR to build your industrial-grade Remote/Centralize or
SCADAapplication system.
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