Comelit MT HDDVR160A - Manual (Page 53)

53
Appendix B
Calculate Recording Capacity
Users can calculate the required size of hard disk according to the total recording duration
and DVR recording settings. The DVR uses fixed video bit rate. The below are the details at
different settings for CBR.
Resoluti
on
Frame
Rate
Totally(FP
S)
Video
Quality
Bit Rate
(kbps)
Used
Space(MB/h)
1080P
6(PAL)/
7(NTSC)
Highest 12M 1350
Higher 9M 1013
Medium 7M 788
Low 6M 675
Lower 4M 450
Lowest 1.5M 169
12(PAL)/
15(NTSC)
Highest 12M 2700
Higher 10M 2250
Medium 8M 1800
Low 6M 1350
Lower 2M 450
Lowest 1.5M 338
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 1080P, video quality to
Lowest, frame rate to 6 fps for enabling total 4channels. He wants the unit to record
continuously in a month. Below is the calculation:
Total Recoding capacity =169 (mb/h) X 24(hours/day) X30(days) X4(channels)=
486720 (MB)
≈ 475(GB)
Therefore, customers need to install one SATA HDDs with 500GB for one month record.