www.fobelec.com An Internet protocol camera, or IP camera, is a type of digital video camera commonly employed for surveillance, and which, unlike analog closed circuit television (CCTV) cameras, can send and receive data via a computer network and the Internet. Although most cameras that do this are webcams, the term "IP camera" or "netcam" is usually applied only to those used for surveillance.
There are two kinds of IP cameras:
Centralized IP cameras, which require a central network video recorder (NVR) to handle the recording, video and alarm management.
Decentralized IP cameras, which do not require a central NVR, as the cameras have recording function built-in and can thus record directly to any standard storage media, such as SD cards, NAS (network-attached storage) or a PC/server.
Previous generations of analog CCTV cameras use established broadcast television formats (e.g. Common Intermediate Format (CIF), NTSC, PAL, and SECAM).It use Coaxial cable RG59+DC cable or RG6+DC cable transmit the signal, But IP cameras may differ from one another in features and functions, video encoding (compression) schemes, available network protocols, and the API to be used by video management software. It use Network cable transmit the signal.