1. 数字录像机(DVR)：
数字视频录像机 (DVR) 主要用于记录来自模拟摄像机或同轴摄像机的数据。它与最大分辨率为 2MP 的模拟同轴摄像机配对使用。在这个系统中，需要电源线和音频/视频线。它提供有限范围的服务，因为它是同轴电缆。在这种情况下，信号稳定性与互联网工作无关。
DVR 系统的优点 –
- 与 NVR 相比更便宜
- 提供超过 HD 的良好图像质量
- 易于操作
DVR 系统的缺点 –
- 需要单独的电源
- 一般低质量的视频
- 覆盖面积较小
- 无法录制音频
- 安装过程复杂
2. 网络录像机(NVR)：
网络视频录像机 (NVR) 主要用于通过网络以无线方式记录来自 IP 摄像机的数据。它与分辨率范围从 2MP 到 12MP 或更高的 IP 摄像机配对。在该系统中，无线或单根以太网电缆用于供电和数据。它提供远程服务，直到网络访问可用。在这种信号稳定性取决于互联网的工作。
NVR 系统的优点 –
- 可以录制视频和音频
- 提供更好的图像质量
- 提供更多系统灵活性
- 提供覆盖区域
- 可以是有线或无线
- 需要一根电缆来连接电源和视频
NVR 系统的缺点 –
- 更贵
- 软件可能难以使用
- 需要网络知识才能操作和排除故障
DVR和NVR的区别：
| S.No. | DVR | NVR |
|---|---|---|
| 01. | DVR stands for Digital Video Recorder. | NVR stands for Network Video Recorder. |
| 02. | It is mainly used for recording data from analog cameras or coaxial based cameras. | It is mainly used for recording data from IP cameras wirelessly over a network. |
| 03. | DVR is paired with analog coax based cameras with resolution 2MP maximum. | NVR is paired with IP cameras with resolution ranging from 2MP to 12MP or higher. |
| 04. | DVR uses Coax cables as transmission cable. | NVR uses Ethernet cables as transmission cable. |
| 05. | It has lower recording quality than Network Video Recorder. | It has higher recording quality than Digital Video Recorder. |
| 06. | DVR system setup is tougher as compared to NVR. | NVR system setup is easier as compared to DVR. |
| 07. | DVR camera cost is lower. | NVR camera cost is higher. |
| 08. | Signal stability is independent upon the internet working. | Signal stability depends upon the internet working. |
| 09. | DVR needs lower operating cost than NVR. | NVR needs higher operating cost than DVR. |
| 10. | In DVR system both power cable and audio/video cable needed. | In NVR system wireless or single Ethernet cable is used for power & data. |
| 11. | It can not be placed anywhere as it is limited by the coax cable. | It can be placed anywhere with a network access. |