What is the difference between NVR and DVR 5

DVR Chinese called network hard disk DVR, can put hard disk, can store the analog camera connected to the DVR, note: is an analog camera.

NVR is more similar to a disk array, which provides network storage space for IPC or DVS, that is, it stores the encoded and networked stream.

The main differences are as follows:

1. The way of access is different, one is digital and the other is analog.

2. The storage capacity is different, DVR can install up to 8 SATA hard disks, and then use the ESATA interface to expand 1 hard disk, up to 9 hard disks; Due to the differences of various manufacturers, some have 16 disks, some have 24 disks, and even 48 disks. In fact, at this stage, most of the NVR is the embedded monitoring software platform in the storage of the x86 architecture, and the general disk array supports expansion, and some manufacturers weigh the expansion cabinet in order to facilitate it, which also improves the **. (The x86 architecture storage expansion capacity is not high, and the stability is not strong, in general, in order to increase the expansion capacity, the CPU and cache need to be increased, so the cost will also increase.)

3. Storage security, DVR information storage is progressive storage, when a hard disk has a bad sector, the device will basically blue screen or crash, while NVR is based on disk array architecture, RAID protection mechanism, so the security of information storage is much higher than DVR.

DVR (Digital Hard Disk Recorder).

DVR (Digital Hard Disk Video Recorder) is the second generation of surveillance system that has developed rapidly after analog video recording system in recent years. Using microcomputer and Windows platform, install **compression card and corresponding DVR software in the computer, different types of **card can be connected to 1 2 4 channels**, support real-time ** and audio, is the first generation of analog monitoring system upgrade to achieve digital optional solutions.

Features of DVR system: **, the acquisition and storage of audio signals are mainly in digital form, with high quality; The system function is relatively powerful and perfect; data can be exchanged with information systems; The flexibility of the application is good. However, due to the limitations of its own technical architecture, the digital hard disk video recorder has always been unable to solve the problems of long delay, inability to monitor multiple channels at the same time, and high integration centralized monitoring in the network remote monitoring environment.

The reason is that the DVR system is transmitted in an analog way from the monitoring point to the monitoring center, and there are many defects similar to the first-generation system, and the optical cable needs to be laid (rented) to achieve long-distance transmission, and the optical transceiver equipment is installed at both ends of the optical cable, and the system construction cost is high, and it is not easy to maintain and the maintenance cost is large. The system is only suitable for the retrofit of traditional monitoring systems, not for new monitoring systems and systems that require long-range transmission (more than 1 2 km).

With the continuous development of the Internet, broadband network technology and information processing technology, in recent years, remote monitoring based on web servers? Embedded DVR systems have sprung up, and embedded DVR is usually called a generation monitoring system? i.e. network ** video recorder NVR.

In the first monitoring system, NVR is an ideal upgrade of analog video recorder and hard disk recorder, and it is a stand-alone independent operation device that eliminates the need for Windows operating system and computer cooperation on the basis of the original DVR. Because NVR adopts highly integrated chip technology, has advanced digital recording, storage and playback functions, does not need to replace and store video tapes, does not require computer cooperation and daily maintenance, therefore, it can achieve high resolution (up to full-D1 resolution), high-quality real-time monitoring, and simple to use.

To put it simply, the NVR system digitizes the traditional **, audio and control signals, and transmits them on the network in the form of IP packets through the network interface on the NVR equipment, and realizes the networking of the system on the basis of DVR.

Among the applications, although the NVR system has the advantages of computer fast processing ability, digital information anti-interference ability, easy to quickly query records, clear images and single display of multi-channel images. However, in essence, NVR not only does not solve the shortcomings of analog transmission in the DVR system, but also does not solve the more management problems caused by the transmission of ** streams in the network. In fact, each NVR forms an independent monitoring center, which brings greater complexity to the implementation of network-wide monitoring.

In areas such as remote control, multi-level scalability, and networking capabilities, it needs to be improved.

NVR enables the traditional network cable (optical fiber, etc.) to connect audio acquisition equipment (network camera, IPC, etc.), and the input and output can obtain higher physical resolution; It is equivalent to a digital signal processing device for digital signals;

NVR enables the traditional wire connection audio acquisition equipment (CCD, analog camera, etc.), and the input and output can obtain physical resolution to meet civilian needs; It is equivalent to a device that processes analog signals to digital signals;

First, the reference is different.

Second, the characteristics are different.

1. DVR: It has a very high technical content, and is a replacement product of tape recorder, which can be used in power remote monitoring, bank security monitoring, building intelligence, home anti-theft monitoring and other fields, and has broad market prospects.

Third, the functions are different.

2. NVR: Its core function is the storage and storage of streams. Compared with DVR, the function of NVR is relatively simple, it does not have analog-to-digital conversion and coding functions, can not work independently, usually works with the encoder DVS or IP camera IPC, to complete the first recording, storage and first function.

Not all DVRs.

The differences are as follows:

1. The concept is different.

CVR is a network storage device.

2. The functions are different.

DVR has the function of recording and recording images and voices for a long time, and remote monitoring and control of Li Pinchong.

3. Different forms.

NVR: The first is a NVR software product based on PC service fighters (Software ONLY), and the second is an overall NVR solution that integrates software and hardware provided by the manufacturer.

DVR: Embedded, Hard Disk Video Recorder (EM-DVR).

Features of NVR.

Video recording and storage functions.

1) Video recording mode.

For different channels on the same NVR, there can be a variety of different recording modes to choose from, such as alarm start and stop recording (pre-recording function before and after), recording according to the schedule (such as 7 days a week, different time periods every day), manual start and stop recording, etc., and can be different settings for the recording parameters of various video modes, such as setting the frame rate.

2) Storage support.

NVRs typically support multiple storage architectures, which can be stored using standard hard disks built into the server, standard external disk arrays with SCSI or FC interfaces, or networked storage devices such as SANs and NASOs.

3) Back up as needed.

Scholars have different views on the time of the beginning of the Three Kingdoms period, which are generally divided into narrow and broad senses. In the narrow sense, Cao Pi forced the Eastern Han Dynasty to offer the emperor Chan concession in 220 years, founded the country Cao Wei, and began the destruction of the Eastern Han Dynasty, and in the broad sense, it was the beginning of the Yellow Turban Rebellion in 184. Historians tend to focus on the formation and process of the Three Kingdoms, since the Eastern Han Dynasty began to lose its political entity and divide its powers, forming the prototype of the Three Kingdoms until the Cao Wei Dynasty and the Han Dynasty, so the period from 184 to 220 is often included in the Three Kingdoms period for discussion [3] [4-5].

Summary. NVR, the full name of Network Video Recorder, that is, the network video recorder, is the storage part of the network monitoring system, NVR and the encoder or network camera work together to complete the video, storage and function. [1]

Chinese name. Network video recorder.

Foreign name. Network Video Recorder for short. nvr

Function. **、Browse and play back multiple network cameras.

Apply. Network monitoring system.

Discipline. Information Science and Technology.

What does NVR mean?

NVR, the full name of Network Video Recorder, that is, the network wide chaos ** video recorder, is the network ** monitoring system of the storage of the ** limbs of the sale of points, NVR and **encoder or Liqiao comic network camera to work together to complete the ** video, storage and ** function. [1] Chinese name: Network video recorder, foreign name: Network video recorder referred to as NVR function**, browse, playback multiple network camera application network monitoring system discipline information science and technology.

Why does the monitor computer display appear NVR?

Take a look at the camera's stream settings, do it according to the number of access to NVR, do it exceed the total bandwidth of NVR, if this is the case, reduce the camera's code pure year.