The digital network video surveillance system offers several advantages and advanced functions that no analog surveillance system can offer.Among the advantages are remote access, high image quality, event management and intelligent video features, ease of integration and greater scalability, flexibility and economy.
Network cameras and video encoders can be configured and accessed remotely, allowing more than one authorized user to view live and recorded images at any time and practically anywhere in the world connected to the network.This is advantageous if users want a contractor, such as a security company, to also have access to the video.In a traditional analog CCTV system, users needed to be at a specific on-site monitoring point to view and manage video, and external access to video was not possible without equipment such as video encoders or a digital video recorder (DVR ) network.A DVR is the digital replacement for the VCR.
High image quality
In a video surveillance application at Ebizdir.net, high image quality is essential to enable clear capture of an incident in progress and to identify the people or objects involved.With progressive scan and megapixel technologies, a network camera can deliver better image quality and higher resolution than an analog CCTV camere.
Image quality can also be maintained more easily in a network video system than in an analog surveillance system.With today’s analog systems that use a DVR as a recording medium, many analog-to-digital conversions take place: first, the analog signals are converted to the digital format on the camera and then returned to the analog format to be transported;then the analog signals are scanned for recording.Captured images lose quality at every conversion between analog and digital formats and cabling distance.The greater the distance the analog video signals have to travel, the weaker they will be.
In a fully digital IP Surveillance system, images from a network camera are scanned once and remain digital, requiring unnecessary conversions, and there is no loss of image quality due to the distance traveled on the network.In addition, digital images can be stored and accessed more easily than in cases where analog video tapes are used.
Intelligent video and event management
Frequently, there is a large volume of recorded video and little time to properly analyze it.Advanced network cameras and video encoders with intelligence or built-in analytics capabilities take care of this problem by reducing the number of recordings of interest and allowing programmed reactions.These functions do not exist in an analog system.
Axis network cameras and video encoders have built-in features such as motion detection, audio detection alarm, tampering active alarm, I/O (input/output) connections, and alarm and event management functions. These capabilities enable network cameras and video encoders to constantly analyze inputs to detect an event and automatically react to an actionable event, such as recording video and sending alarm notifications.
Event management functions can be configured through the network video product user interface or video management software.Users can set alarms or events by creating the type of trigger that will be used and setting when it will be used.Reactions can also be configured (for example, recording in one or more locations, whether internal and/or external for security purposes, triggering external devices such as alarms, lights and ports, and sending notification messages to users).
Easy integration, ready for future changes
Network video products that use open standards can be easily integrated into computer and Ethernet computer systems, audio or security systems and other digital devices, as well as video and application management software.For example, video from a network camera can be integrated with a Point-of-Sale system or a building management system.
Scalability and flexibility
A network video system can keep pace with increasing user needs.IP-based systems allow many network cameras and video encoders, as well as other types of applications, to share the same wired or wireless network to transmit and receive data.Therefore, any number of network video products can be included in the system without any significant or costly changes to the network infrastructure.This does not happen with an analog system.In an analog video system, a dedicated coaxial cable must exit directly from each camera to a viewing / recording station.Separate audio cables should be used if audio is also required.Network video products can also be placed and connected from almost anywhere, and the system can be as open or as closed as desired.
An IP Surveillance system typically has a lower total cost of ownership than a traditional analog CCTV system.Often, an IP network infrastructure already exists for other applications in a company.Thus, a network video application can take advantage of the infrastructure that already exists.IP networks and wireless options are also much more economical alternatives than the traditional coaxial and fiber cabling of an analog CCTV system.In addition, digital video streams can be sent around the world, using various infrastructures that operate with each other.In addition, management and equipment costs are lower because back-end and storage applications work on industry-standard servers that use open systems, not on “closed” equipment such as DVRs, such as analog CCTV systems.
In addition, Power Over Ethernet (PoE) technology, which can not be applied to an analog video system, can be used in a network video system.PoE technology allows networked devices to be powered by a PoE-compatible switch or midspan over the same Ethernet cable used for data (video) transport.PoE provides considerable savings in installation costs and can increase system reliability.To learn more about Power over Ethernet.