Distinction between DVR & Digital Video Server

(cont...)

DVR and video server share a number of beneficial features and functions: recording to digital hard disk; no tape maintenance; consistent high image quality; fast, easy image retrieval, access to recorded video over IP networks, etc. However, a more comprehensive comparison of the two technologies reveals how digital video server technology offers a number of significant advantages over a standard DVR:

	Scalability
	Digital video server scales from one to thousands of cameras in increments of a single camera. Increase frame rate and storage by adding hard drives or NAS (Network Attached Server), RAID, or even larger storage devices to the network. Any frame rate for any camera at any time is available and manageable through remote control centers.
	Working with 3G - integration with CDMA and PHS
	AcroComm's video server has successfully integrate with CDMA and PHS transmission mode for smarter and wider application usages. Sending live video from moving vehicles back to control center through 3G is opening a new era for the digital industry. Applications can include fleet management, public transportation, delivery service, logistic system... etc.
	A more cost efficient infrastructure
	Most facilities are already wired with twisted pair infrastructure so no additional wiring, an expensive part of the CCTV installation, is required. Where there is no infrastructure, installation of twisted pair is cheaper than with coax wiring. In addition, wireless networking can be used with digital video server where cabling is unpractical.
	Remote accessibility
	Any video stream, live or recorded, can be accessed and controlled by password verification from any location in the world over network or wireless communication.
	Intelligence at security level
	Motion detection, event handling, sensor input, relay output, time and date, and other built-in capabilities allow the digital video server to make intelligent decisions on when, how, and whom to send alarms, video and at which frame rate, improving information access and decision-making.
	Increased reliability
	IP-based data transports enable off-site storage and the ability to use redundant infrastructure, server and storage architecture. By using standard server and network equipment, replacement time if any unit should go down is considerably less circumstances on preventive measures. Moreover, storage in DVR can suffer shorter life cycle and the replacement of its hard disk consumes great amount of cost and human effort. While with digital video server, the storage system is out-linked and can be replaced or expanded anytime as the environment requires.
	Increased intelligence
	Located at the front end (CCTV or PTZ camera) level, functions such as the flexible definition of VMD (Video Motion Detection) manner, license plate recognition, event triggers, object tracking... etc.
	Wireless transmission
	Digital video server is able to enjoy the convenience and benefits of wireless connection standard technologies such IEEE 802.11b, and wireless access to any video via PDAs, Tablet PCs, and cellular phones.
	Working with 3G - integration with CDMA and PHS
	AcroComm has successfully integrate with CDMA and PHS transmission mode for a smarter and wider application fields. Sending live video from moving vehicles back to control center through 3G is opening a new era for the digital industry. Applications can include fleet management, public transportation, delivery service, logistic system... etc.
	Encryption enables data accuracy
	Digital video server is able to encrypt and compress the incoming video signal and then transfer up onto network system. Data accuracy and be better enhanced and secured than DVR, which directly receives the hugh data flow from the front end camera.

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