TVD-04 / TVD-08 / TVD-16 / TVD-16-1U Quick Setup Guide
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APPENDIX_B Calculate Recording Capacity
User 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 (FPS)
Video
Quality
Bit Rate
(kbps)
Used Space(MB/h)
720P
25(PAL)/
30(NTSC)
Highest
6144
2700
Higher
5420
2250
Medium
4096
1800
Low
3072
1350
Lower
2048
900
Lowest
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 uses NTSC cameras, set resolution to 720P, video quality to Lowest, frame rate to
30fps for enabling total 16 channels. He wants the unit to record continuously in a month.
Below is the calculation:
Total Recoding capacity =450 (mb/h) X 24(hours/day) X30(days) X16(channels)= 5184000(MB)
≈ 5184(GB)
Therefore, you need to install two 3 TB SATA HDDs for recording in one month.