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DVR (Digital Video Recording) is a style of recording system that changes the signal of analog image in CCTV camera into the digital data. DVR compresses and retrieves the recording images through the international code of H.263 or H.264MPEG (Moving Picture Experts Group) so that it can display clear image. DVR has also a lot of strong points compare to current CCTV systems as:
- High speed multi-recording
- Motion Detection
- Remote Camera Control
- Function of magnifying image
- Editing
- Storage data permanently
- Remote surveillance, recording and palay-back through modem, LAN and xDSL
- Competitive price level compare to existing analog CCTV recording system
- DVR provide the newest surveillance system can protect crime and reform security system.
DVR versus VCR |
| |
DVR |
VCR |
| Record Method |
Digital |
Analog |
| Storage |
Hard Disk (Upto 20 Days) |
Video Tape |
| Motion Detection |
Yes |
Need Extra Sensor |
| Display |
User Defined (1,4,9,16) |
Single or Quad |
| Camera Control |
RS232 (with PC) |
Need Extra Hardware |
| Image Reproduction |
Clear (Can be printed) |
Unclear |
| Scheduling |
Yes |
No |
| Random Search |
Yes (By hours,Day,Year) |
No |
| Image Search |
Random |
No |
| Remote Access |
Yes (By Phone,Internet) |
No |
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