Previous method for recording CC-TV on tape with tape-recording equipment is an analog type. Therefore, it is very inconvenient to change the tapes frequently and it lowers the quality of image. However, a Digital Video Recorder or DVR, digitally records the video image so it providers clear image like a picture. It also has a function to record continuously so you don’t have to worry about the frequent change of tapes. DVR, therfore, is a video recording surveillance system for the next generation and it is growing very rapidly. In addition to that, it has communication function which enables you to detect remoteness screen even from household and it contains a multi branch of up to date function. Item Analog Digital Recording Analog Image High Resolution Image Recording Media VCR Tape (Frequent Change) High quantity Hard Disk Continuous Recording Image Quality gets worse when recorded for a long time Unlimited Reuse Image Search Takes long time to go through Search within one second Image Quality Low Image Quality High Image Quality System Maintenance Need have space to store tapes No maintenance is required Image transmission function No function Transmission possible Cost for Maintenance Recorded Tape, Head change for VTR and its following cost to maintain No cost for maintenance Detection Area To a distance where cable can reach No distance limitation Print Separate equipment is needed Output of High quality screen image, remote output and transmission, internally installed Recording Record without any option Record by Sensor (Eliminate unnecessary recording) Main Functions REAL TIME MONITORING : High picture quality, high-speed, real-time sensor detection, record, multi-screen   monitoring (up to 16 cameras simultaneously). Search Real-Time : Search by date, time, and camera Efficient Video Compression : Kodicom's patented algorithms capable of high-resolution compression to less than 3Kb per frame. Auto detection : Kodicom's patented motion detection algorithms integrated into software automatically detect   any moving objects or trigger other external sensor devices. Image transmission : Clear transmission and assimilation of high-altitude real-time images (PSTN, ISDN, LAN, Internet) resulting in high-speed remote video transmission. Auto transmission for emergency : Auto transmission to center when emergency occurs. Screen Split : 1, 4, 9, 16 split monitoring Remote area control : PAN/TILT, ZOOM, CONTROL and various electric machinery and tools, MODEM CONTROL Special Real time remote surveillance by PC Monitor Easy operation using a friendly user interface More economical than the timelapse V.C.R High resolution digital Image. No degradation. Permanent and event-controlled recording Password Protection Low management, operation and maintenance costs Adjust recoerding speed camera by camera. Available concise survillence, recording and search.