Differences between DVS and DVS

1. Abbreviation of DVS (Digital Video Server) network video server.

Principles of DVS
The network video server implements the IP address of analog audio and video signals. Digital Video and Audio Signal MPEG-4 video compression algorithm and g.729/ADPCM Audio Compression Algorithm for compression encoding, then, the low-Bit Rate Video/Audio Encoding data is transmitted to multiple remote PCs or network video decoders in the form of IP packets through the IP network to achieve remote transmission, network monitoring, and network storage of video/audio; most video servers use high-speed embedded processors and embedded real-time operating systems. The products are stable and reliable. It features low bandwidth resources, diverse access methods, and flexible adjustable image quality and bit rate. Supports remote mirror control and remote alarm management.

The Network Video Server is a professional network transmission device that compresses and processes audio and video data, it consists of audio and video compression codecs, input and output channels, network interfaces, audio and video interfaces, RS485 serial interface control, protocol interface control, and system software management, it mainly provides video compression or decompression function to complete image data acquisition or restoration, etc. currently popular Based on MPEG-4 or H. 264 of image data is compressed, and data and audio data are processed over the Internet.

Development of DVS

After recent years of development, video transmission has gradually evolved from single-function video transmission to wifi network, local SD card storage, USB storage, or IDE hard disk storage; the transmission channel has gradually evolved from a single channel to an Integrated System for Multi-menu operations and management, including single-channel D1, two-channel hd1, and four-channel CIF and multi-channel compatibility.

Currently, the communication methods of network video servers have gradually evolved from pure wired networks to wired and wireless WiFi (802.11a B G communication protocol) compatible wireless transmission distance also evolved from dozens of meters (30-meters) to dozens of kilometers (30-50 kilometers ).

Ii. DVR (digital video recorder). digital DVR

A video recorder is used to record TV images and sound, store video signals of TV programs, and send them back to a TV transmitter or directly to a tape recorder in the TV. Magnetic recorders, video recorders, electronic beam recorders, hard disc recorders, video recorders, screen recorders, QQ video recorders, video recorders, and other types.

With the increasing tide of digitalization, DVR has become the new darling of digital security in the new century, the DVR application has evolved from the initial financial field to various application places such as transportation, public security, environment, intelligent building, square, data center, and test room, if you want to use images and sound for monitoring, you will think of the DVR system. DVR has become a hot product in the video surveillance field and a highlight of current security products.
Since its development, the real needs of various manufacturers in the security industry and the technical improvements and solutions proposed by special applications in different places have been put forward in full bloom, from m-JPEG, MPEG-2 to popular MPEG-4, H. 264 compression technology, from soft compression to hard compression, the increasing number of video channels (4, 9, 16, 32, etc.), and the network functions of the system are dazzling. With various application environments, DVR products have developed different series of products. there are various brands, models, and different functions on the market, but in general, there are two categories by system structure: pc dvr Based on PC architecture and embedded DVR Based on PC architecture.

DVR refers to the DVR product that extends the network function based on the traditional DVR, so that more users can access it. It is precisely because of this product development philosophy that, the DVR product with the network function is a traditional DVR, and its main function is storage, which also determines that its market position is in a small network environment, the monitoring site is also limited.

The main function of DVS is to focus on network transmission. The network here is a big concept. The product is designed to adapt to different network environments, such as lan, Wan, internet or wireless network, and do not limit the number of monitoring sites, do not limit the number of user access.

From the perspective of product applications, Video Servers focus on remote monitoring, such as road traffic, unattended substations, oilfield production management, and telecom data center monitoring. The monitoring points in these fields are scattered, remote cabling is difficult. To establish a brand new system, you can directly select a Network Camera. If the system already has a traditional monitoring front-end, you can use a video server as an effective supplement; if the monitoring scope is in the residential area and remote monitoring is not required, the DVR can be used more practically.

With the advent of the information age, people have put forward higher requirements for network applications. Network Cameras and video servers can be remotely monitored through the Internet in any corner of the world, complex network configuration and wiring are not required, which greatly reduces engineering costs and plays an important role in a remote and centralized monitoring environment. Although network cameras and Video Servers are representative products in the Internet era, they are still in the process of continuous development and improvement. When their network advantages are increasingly valued by people in the industry, we believe that with the continuous improvement of network resources, products will further exert their potential.