Vendor Surveillance Corporation

The discussion among the security and the supervision manufacturers video, the system intedgrateurs, and the consumers of the advantages and the relative indications for the different types of video installations is easy to simplify to a fault. Simplification helps the taken decision of consumer and advances the interests of matters of manufacturers of equipment and the system intedgrateurs. The industry writers have also the good encouragement to simplify the news. The a lot of motives include the point to return bigger one, supporting an argument of specific case, and obtaining and keep attention of the readers.

Simplification takes most often to the declarations as "the video of IP is the than analogous dearer video," that are true with so many exceptions as they are not in true fact to all - student subsidized by the parties interested showed on the contrary to be true, and the editors and the blogueurs covered the conclusions of the studies widely. Indeed, the oversimplification takes often to an affirmation and his straight out of the two to be true.

Another demonstration of oversimplification is the argument that every installation is so unique that no useful rules-of-the thumb can be developed.

In this paper that we furnish as simple as possible an explanation of the factors that indicate the analogous one, IP, and the video, IP/ANALOGOUS systems and cross respectively. This paper tries furnish a reference for the editors, the consumers, and the intedgrateurs that can need to evaluate a specific case or understands the general principles.

The indications to choose a system of camera of pure IP

The capacity to use one to exist that IT forms a network - in certain cases, the video, video and numerical systems with the cameras of IP can be connected to the infrastructure of current IP. And the other times the cost for the updating to the network to do it viable for the video easily is managed. A user with a network of current Ethernet that can check big quantities of data, that have just need of some cameras or projects to record rhythms of picture or the low low resolution, is a good case for a system of pure IP. The recording to the "edge" network with the ask only occasional for the video on the principal network can furnish also a manner to execute the video of IP on current infrastructure.

Protection of quick and easy information In the recording environments a lot of missions criticize, the lost data or to lack is not acceptable. The systems of IP can shorten times of response and the speed on the redeployments of DVR. If a DVR goes out connection, the user can use software to transfer the camera to a different DVR without doing any changes of installation edledctrique. The response times that record problems are so quick, since the recording systems are checked to the IT forms a network the level of direction next to all the others waiters, the routeurs, the switches, and the network applications.

The capacity to move and to add cameras easily - the Users with to vary accounts of camera and the locations can avoid the need to cut the tension of the waiters recording to add, to move itself, or to remove cameras. This means the continuous recording and free pain of the current cameras, instead of the dead time planned with the recording of alternate waiter or the missed recording.

The capacity to collect the pictures of medgapixel - the Users that need the really high pictures resolution want the capacity selectively to deploy the network cameras that furnish pictures with the resolutions at least four than analogous higher time pictures - that means a lot more detail than an analogous camera (that is limited to the dimensions of standard picture that do not surpass 704x576 pixels (the BUDDY) Or 720 x's 480 pixels (NTSC) the picture after the signal was digitized in a DVR or a video waiter). The cameras of medgapixel can collect as much information as you can do a zoom towards to take the smallest detail more subtle of a video framework. The cameras of IP of medgapixel can furnish the superior one, the non ambiguous pictures of not at all-of-the transactions of sales and the other events that can be used for matter intelligence, the loss obstacle, and the security.

The capacity to use the recognition of the analytical face - the software of recognition of the face depends on the high pictures resolution to be effective. Any camera is filtered for the recognition of the face should have more than the 704x576 pixels (the BUDDY) or 720 x's 480 pixels (NTSC) furnished by an analogous camera.

The interruption minima and spends installation - Even if a new network of Ethernet needs to be installed to check the video circulation, the systems of supervision of pure IP are less disruptive to install that their pure analogous counterparts. In contrast to the systems of IP, the analogous systems demand the installation of a direct coaxial one, the Fiber, or the cable of UTP that runs of every camera to a DVR, just like to encode additional equipment to be installed on the DVR itself. The systems of IP can distribute also the loads of strength and HVAC to help users avoid the dear modifications of site and disruptive to HVAC and the characteristic others of site.

Need for the video transmission on the wide geographic range - Putting the video the IT forms a network of the brands it possible to use switches, the hubs, and the routeurs to increase the network to a wider range. The analogous cameras have significant limits of transmission on the wide sectors of supervision, and they are not fitting for some installations of wide sector because of their need physically to be wired to a DVR.

Need for the advanced characteristics as the numerical zoom, that is not available in the analogous cameras - a lot of new cameras IP have to encode integrated and the analytical ones just like in demands characteristics that the certain users need with success to execute their supervision project.

Need for the camera level recording redundant - Some cameras IP can furnish the redundance by the recording on the cards memories integrated.

The indications to choose a pure analogous system

The analogous one can meet the recording of the user needs for a lower cost - there is the a lot of fine decrease, the cameras of IP of low resolution that are low in the cost. But IP of fine top and the cameras of medgapixel are very dear, and the disc capacity demanded to store the highest volume of video data is an increased very significant expenditure. Through a picture of network of hundreds or of thousands of cameras this cost can be prohibitive. A big network of cameras of IP will demand of ordinary one that the separated installation of a network if circulation does not surpass the width of band. An installation of just 40 cameras of 1000 Kbps-1 Mbps will overwork each a lot of to exist the business networks. A lot of ends of high analogous cameras, although limited in the resolution to 704x576 pixels (the BUDDY) or 720 x's 480 pixels (NTSC), use the treatment of the pictures, automatic of return the sensitiveness of home and imager to produce pictures that is superior in the quality and the clarity to one of even or camera of high evaluated IP.

The advantage of cost of recording of analogous one is especially true for the users that already have a coaxial legs or installation edledctrique of UTP and does not have at his place need to install several cameras (the analogous cameras demand a lot of installations edledctrique, that can cost a lot and disruptive in the terms of modifications of site).

The network circulation surpasses the capacity of the current user - the camera of IP that records and look at will increase the network circulation, especially with the cameras of a lot of IP or with or the cameras of medgapixel. If the recording will surpass the capacity of current network, a user will need to add the costs to install an additional network for the video to the operational costs and of equipment of pure IP while comparing to it the analogous one and to the options cross analogous ip.

The capacity to avoid the expenditures of material updating - the cameras of IP tend to count on the strength of treatment of the CPU. A lot of analogous systems use additional processors to divide the video treatment with the CPU. But a stream of camera of IP comes in the harbor of network and demands that the CPU to be recorded and to be looked at. This limit the number of cameras of IP that can be added the load the systems of waiter can treat. These factors depend on bitrate and video that code the format (MJPG, O'CLOCK. 264, MPEG). And most of cameras of IP send big files (MJPEG) to the waiter to treat and to store. These files furnish a good picture but are very big and consume big quantities of emmagasinage very quickly. The newest compression formats to the horizon for the cameras of IP will help the address this problem.

Need for the latency minimum - the Latency is defined as the time that it takes for a captured picture to a camera source to be presented to a system user. Every camera has the latency to a degree, because the data trips from one location to another. This is a lot bigger for the systems of IP nevertheless because their signals need to be encoded at the source and must travel then by the network to the decoder to be presented to the user. Because the analogous signals are not at all to not at all (will drug-a -monitor), they do not have the additional latency caused by to direct network and to encode it and the decoding process. Because of this they typically are preferred in the industries as the game and as the corrections.

Need for the system to suit capacities to the personnel - a lot of businesses work without the complex or the vast computer systems and do not have a need for the devoted professional computer scientists that are demanded to furnish the timely and effective response to form a network of the urgencies on a system of size or of complexity.

The variety more of wide cameras and the choice - there is a big variety of Analogous cameras (for example, the mini cameras and the secret saucepans-slope-the zoom cameras in the various sizes and the various forms) to choose of. With the cameras of IP, not every salesman has a lot of varieties and not every assistance logicielles of supervision of the salesman of others' the cameras. In a lot of organizations, of physical security personnel takes care of the administration of system of supervision just like the conception of project of general security and implementation, and there is not to exist IT needs that THE demands trade people.

The relations of salesman and supports - the relations of Salesman have the strong strength to improve or strong to damage the experience user and dissout the margin of the intedgrateur. The intedgrateurs and the users to the installations that already have analogous cameras have a current relation with the manufacturer, therefore the support and the confidence in the product already are to his place. If the manufacturer of camera or DVR with that a relation does not exist the cameras of IP of a/support, a new relation of confidence and of access to support must be developed.

The indications to choose a hybrid IP/ANALOGOUS system

(A hybrid system will furnish a lot of the advantages of the pure systems on the basis of by camera. To follow it is true only systems cross).

The capacity to add the recording of camera of IP to the current investments in the analogous one - Where exists there analogous infrastructure, the hybrid approach allows the user to avoid the dear replacement of their cameras and to telegraph current analogous. Rather, the user can add the cameras of IP to their resources of supervision and records analogous cameras and IP in the same DVR.

The just camera for the every site - the recording of Cross allows the user to choose analogous cameras or cameras IP according to the conditions of recording and the conditions of every site of camera. An exacting site that the possible latency the lowest one will call an analogous camera, while a usage of site recognition of the face or other data starved analytical will need a source of camera of P.

The minimal expenditures of recycling - the familiar operators of Supervision with an interface user of analogous current system will be able to manage the new cameras of IP without disruptive and recycling dear. Using the recording crosses DVR/NVR allows the integration of cameras of IP with the small change to the routine of the normal final user.