User manual

Digital Video Recorder User Manual
122
Appendix B Calculate Recording Capacity
Users can calculate the size of hard disk according to the saving time and DVR recording settings. The DVR uses fixed
video bit rate. The below are the details at different settings.
Video
Format
Resolution
Frame Rate
Totally(FPS)
Video Quality Bit Rate (kbps) Used Space(MB/h)
Highest 2M 915
Higher 1.5M 700
Medium 1M 465
Lower 768K 297
PAL
D1
25
Lowest 512K 241
Highest 2M 910
Higher 1.5M 712
Medium 1M 468
Lower 768K 297
NTSC D1 30
Lowest 512K 241
The calculation format is:
Total Recording capacity =Used space per hour (MB/h) (coverage rate of hard disk) × recording time (hour)
×channel numbers
For instance, one customer uses PAL cameras, set resolution to D1, video quality to Higher, frame rate to 25 fps for
enabling total 4 channels. He wants the unit to record continuously in a month. Below is the calculation:
Total Recoding capacity =700 (mb/h) X 24(hours/day) X30(days) X4(channels)= 2016000(MB)≈2016(GB)
Therefore, customers just install two SATA HDDs with 1000GB, it can almost record for one month.