User manual TBK-NVR5004 TBK-VISION PLUS
67
www.tbkvision.com
Appendix B Calculate Recording Capacity
You can calculate the size of hard disk according to the storage time and NVR recording
settings. The formula is as follows in full frame rate condition. Used space per hour (MB/h) =
Bitrate (kbps) ÷ 8 × 3600 ÷ 1024. The below are the details at different settings.
Resolution
Frame Rate
Record Bitrate (kbps)
Used Space(MB/h)
1080P
30(NTSC)/
25(PAL)
8192
3600
7168
3150
6144
2700
4096
1800
3072
1350
720P
30(NTSC)/
25(PAL)
6144
2700
5120
2250
4096
1800
2048
900
1024
450
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 sets resolution to 720P, frame rate to 15fps, bitrate to 4M and
enables total 4 channels. He wants the unit to record continuously in a month. Below is the
calculation:
Total Recoding capacity = 450 (mb/h) × 24(hours/day) × 30(days) × 4 (channels) =
1296000 (MB)
≈
1266(GB)
Therefore, customers need to install 1 SATA HDD with 1.5TB to record for one month.
