- DCN Tutorial
- Data Comm & Networks Home
- DCN - Overview
- DCN - Computer Network Types
- DCN - Network LAN Technologies
- DCN - Computer Network Topologies
- DCN - Computer Network Models
- DCN - Computer Network Security
- Physical Layer
- DCN - Physical Layer Introduction
- DCN - Digital Transmission
- DCN - Analog Transmission
- DCN - Transmission media
- DCN - Wireless Transmission
- DCN - Multiplexing
- DCN - Network Switching
- Data Link Layer
- DCN - Data Link Layer Introduction
- DCN - Error detection and Correction
- DCN - Data Link Control & Protocols
- Network Layer
- DCN - Network Layer Introduction
- DCN - Network Addressing
- DCN - Routing
- DCN - Internetworking
- DCN - Network Layer Protocols
- Transport Layer
- DCN - Transport Layer Introduction
- DCN - Transmission Control Protocol
- DCN - User Datagram Protocol
- Application Layer
- DCN - Application Layer Introduction
- DCN - Client-Server Model
- DCN - Application Protocols
- DCN - Network Services
- DCN Useful Resources
- DCN - Quick Guide
- DCN - Useful Resources
What is the difference between DVR and NVR?
Let us understand what a digital video recorder DVR is.
DVR stands for Digital Video Recorder. It is a recording device that records video in a digital structure and saves it on hard drives instead of videotapes. It needed video signals to be digitized and compressed to save as many days’ worth of video feed as available.
Security systems using DVRs play an important role in alarm verification and security assessment. The digital video images are saved on hard disks similar to those used in the PCs and have storage areas calculated in gigabytes. It provides a cheap but efficient technique for saving compressed video files. It is generally used to record analog or coax-based cameras.
Components of DVR Systems
There are various components of DVR systems which are as follows −
The DVR system uses analog cameras. The camera is answerable for streaming an analog signal to the recorder, which then processes the video information. Unlike NVRs, some DVR cameras are less costly.
The coaxial cables attach the analog camera to the DVR system. The use of a coaxial cable cannot seem significant because of its limitations; however, ultimately data is shared over this cable type. Coaxial cable does not provide power supplying devices on the equivalent line.
Therefore, another cable is required to transfer electrical signals, while the other cable transmits data signals for video transmission. These cables are inflexible and larger than Ethernet cables, creating installation a challenge. Audio is a limitation as the standard coaxial cable cannot provide audio transmission.
DVR recorders heavily depend on AD encoders, which are responsible for processing the raw information streaming from the camera into visible footage. Therefore, each camera in this security system is required to be attached to both the recorder and an independent power source.
NVR stands for Network Video Recorder. It is an electronic recording device that uses digital or analog cameras transformed into IP cameras using a network server. The digital data is created to a network in consent with the TCP/IP transport protocol and documented by an NVR.
It is a self-included system that involves the computer, software, storage, and a multiport Power over Ethernet (PoE) transform in one unit. NVRs are plug-and-play devices equal to DVRs, except they are used with IP cameras rather than analog cameras.
The Network Video Recorder receives, saves, and handles digital video streams shared by IP cameras over the network. The NVR enables us to watch, browse, playback, manage, and save multiple IP cameras simultaneously.
- Related Articles
- What is the difference between = and: = assignment operators?
- What is the difference between IAS and IPS?
- What is the difference between g++ and gcc?
- What is the difference between Hinduism and Buddhism?
- What is the difference between SQL and MySQL?
- What is the difference between Liter and Litre?
- What is the difference between ODBC and JDBC
- What is the difference between $ and @ in R?
- What is the difference between jQuery.size() and jQuery.length?
- What is the difference between jQuery and AngularJS?
- What is the difference between jQuery.show() and jQuery.hide()?
- What is the difference between jQuery.animate() and jQuery.hide()?