TechVision PS8E1N2, Manual

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Calculate Recording Capacity DVR User Manual
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Appendix B Calculate Recording Capacity
The recording capacity is mainly up to the record resolution, record stream and bitrate.
Different image quality parameters decide different disk capacity occupation in equal times.
The bigger the record resolution, record stream and record bitrate is, the more disk capacity is
taken up in equal times. The calculation format of recording capacity is shown as below.
Recording Capacity(MB) = Bitrate(Kbps) ÷1024 ÷ 8 × 3600 × Recording hours per day ×
Record Storage Days × channel numbers
3600 means record for an hour(1TB=1024GB
，
1GB=1024MB
，
1MB=1024KB
，
1Byte=8bit).
Record Bitrate
(Kbps)
Used Space
(MB/H)
Used Space
(MB/D)
10240 4500 108000
8192 3600 86400
6144 2700 64800
4096 1800 43200
3072 1350 32400
2048 900 21600
1024 450 10800
768 337.5 8100
512 225 5400
384 168.75 4050
256 112.5 2700
The table below shows the recording capacity requirements for record storage in 30 days.
Record Bitrate
(Kbps)
Recording Capacity(TB)
1CH 4CH 8CH 16CH 32CH 64CH
10240 3.09 12.36 24.72 49.44 98.88 197.76
8192 2.48 9.89 19.78 39.56 79.11 158.21
6144 1.86 7.42 14.84 29.67 59.33 118.66
4096 1.24 4.95 9.89 19.78 39.56 79.11
3072 0.93 3.71 7.42 14.84 29.67 59.33
2048 0.62 2.48 4.95 9.89 19.78 39.56
1024 0.31 1.24 2.48 4.95 9.89 19.78
768 0.24 0.93 1.86 3.71 7.42 14.84
512 0.16 0.62 1.24 2.48 4.95 9.89
384 0.12 0.47 0.93 1.86 3.71 7.42
256 0.08 0.31 0.62 1.24 2.48 4.95
For instance, there is a 32CH DVR recording 24 hours per day and the record stores for 30
days. The DVR adopts dual stream recording. The main stream is 4096Kbps and the sub stream
is 1024Kbps, then the total recording capacity is 49.45TB (39.56TB + 9.89TB).
Considering the format loss of the disk is about 10%, the required disk capacity will be 55TB
(49.45TB
÷ (1-10%)).