Transcendent DVR Series
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Appendix B Calculate Recording Capacity
You can calculate the size of hard disk according to the storage time and HD TVI Hybrid
DVR 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
Bit Rate
(kbps)
Used
Space(MB/h)
1080P
15fps (NTSC)/
12(PLA)
12M
2700
10M
2250
8M
1800
6M
1350
4M
900
2M
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 1080P, frame rate to 15fps, bitrate to 4M
and enables total 4 channels. He wants the unit to record continuously for 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 one SATA HDD with 1.5TB to record for one month.
