Optiview NV432P16-4K, Руководство пользователя

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8 Appendix A HDD Capacity Calculation
Calculate total capacity needed by each device according to video recording (video recording type and
video file storage time).
Step 1: According to Formula (1) to calculate storage capacity
q
i
needed for each hour, unit Mbyte.
that is the capacity of each channel
q
i

d
i

8

3600

1024
(1)
In the formula:
d
i
means the bit rate, unit Kbit/s
Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the storage
capacity
m
i
, which is storage of each channel needed unit Mbyte.
In the formula:
m
i
=
q
i
×
h
i
×
D
i
(2)
h
i
means the recording time for each day (hour)
D
i
means number of days for which the video shall be kept
Step 3: According to Formula (3) to calculate total capacity (accumulation)
q
T
channels in the device during scheduled video recording .
that is needed for all
q
T


m
i
i

1
(3)
In the formula:
c
means total number of channels in one device
Step 4: According to Formula (4) to calculate total capacity (accumulation)
q
T
that is needed for all
channels in device during alarm video recording (including motion detection) .
q
T


m
i
× a% (4)
i

1
In the formula
：
a% means alarm occurrence rate
c
c