TL/DR: Analog cameras transmit video over coaxial cables to a DVR, which converts it into digital format for storage. They are cost-effective but have lower resolution compared to IP cameras.
An analog camera is a type of video surveillance camera that captures video as an analog signal and transmits it through coaxial cables to a DVR. The DVR then converts the analog signal into a digital format for recording and playback. Unlike IP cameras, which transmit data over a network, analog cameras rely on a direct wired connection and are typically part of a closed-circuit television (CCTV) system. They are commonly used in security setups where a DVR is used to manage multiple cameras.
An analog camera works by capturing light through its lens, which is then processed by an image sensor, typically a CCD (charge-coupled device) or CMOS (complementary metal-oxide-semiconductor) sensor. This sensor converts the light into an analog electrical signal that represents the video footage.
The analog signal is then transmitted through coaxial cables to a digital video recorder (DVR) or other receiving devices. The DVR serves multiple functions: it converts the analog signal into a digital format, compresses it for efficient storage, and stores the video data on a hard drive or other media. The DVR also allows users to view live footage or recorded video through connected monitors.
Analog cameras rely on a dedicated point-to-point wired connection for video transmission. Multiple analog cameras can be connected to a DVR in a security system, enabling centralized monitoring, recording, and playback.
Analog security cameras are not necessarily outdated, but they are considered less advanced compared to modern IP cameras. Analog systems still serve basic security needs, offering reliable video transmission over coaxial cables and integration with DVRs. However, they lack the high-resolution video quality, flexibility, and advanced features (such as remote access and intelligent analytics) that IP cameras provide. Coram can help you update the traditional analog setups to add intelligent analytics or remote access capabilities, offering a hybrid solution for improved monitoring with the latest IP cameras.