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99
channel needed for every hour, unit Mbyte.
1024
3600
8
÷
×
÷
=
i
i
d
q
(1)
In the formula:
i
d
means the bit rate, unit Kbit/s
Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the
storage capacity
i
m
, which is storage of each channel needed unit Mbyte.
i
m
=
i
q
×
i
h
×
i
D
(2)
In the formula:
i
h
means the recording time for each day (hour)
i
D
means number of days for which the video shall be kept
Step 3: According to Formula (3) to calculate total capacity (accumulation)
T
q
that is needed for
all channels in the DVR during
scheduled video recording
.
∑
=
=
c
i
i
T
m
q
1
(3)
In the formula:
c
means total number of channels in one DVR
Step 4: According to Formula (4) to calculate total capacity (accumulation)
T
q
that is needed for
all channels in DVR during
alarm video recording (including motion detection)
.
∑
=
=
c
i
i
T
m
q
1
×
a%
(4)
In the formula
:
a%
means alarm occurrence rate
Содержание DS-7108HI series
Страница 1: ...1 User Manual of DS 7108HI series Net DVR V2 1 ...
Страница 42: ...42 or press Cancel to abort modification ...
Страница 78: ...78 ...
Страница 90: ...90 Fig1 ...
Страница 93: ...93 Fig 6 Fig 7 Step 3 ...
Страница 96: ...96 Fig 10 ...
Страница 102: ...102 The corresponding relationship of cross cable ...
Страница 108: ...108 Suggestions ...