This device is the newest technology achievement in image recording. Recording is done on a hard drive using computer technology. There are simple recorders with simple image resolution CIF 352CH288 up to D1 720X576 and High Definition recorders with recording speed from 6 frames/sec to real time 25 frames/sec.
Digital recorders are divided into two categories: Autonomous (stand) alone and digital recording cards. Also, there are recorders for 4-8-16 and 32 cameras.
Their advantages are the following:
-Secure and long recording duration.
-Digital images and printing.
-Immediate images retrieval, by date, time, camera, event, etc.
-Simultaneous live display, recording, transfer over a local network or the Internet.
-Saving files on hard disk, USB, and DVD RW.
-Digital zoom-in on live images or recording.
-Managing speed dome cameras.
-Additional outputs for alarms or events.
-Operation via remote control, local network or Internet.
-Monitoring live images or recordings on a computer or new generation mobile phone.