Bandwidth and storage capacity calculations – Sony SNC-CS50P User Manual
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Bandwidth and Storage Capacity Calculations
When designing your surveillance system, it is essential to
prepare a sufficient amount of storage and network
bandwidth. The following is an example showing how to
calculate the required network bandwidth and storage
capacity to transmit and store JPEG images.
MPEG-4/H.264
Because of the nature of MPEG-4 and H.264, it is very
difficult to accurately calculate required network
bandwidth and storage capacity as we did with JPEG. As
explained above, these compression methods are based
on the difference in movement within a scene; therefore,
scenes with little movement require less data than scenes
with significant movement.
The MPEG-4 and H.264 bandwidth settings in these
cameras can be preset to any of the nine levels as follows:
MPEG-4: 64, 128, 256, 384, 512, 768, 1024, 1536, 2048 Kb/s
H.264: 32, 64, 128, 256, 384, 512, 768, 1024, 1536 Kb/s
*5
This table shows sample calculations for reference purposes only. Actual bandwidth and storage requirements should be properly tested with each system
installation.
*6
Maximum frame rate might be limited depending on compression level, resolution, and camera function settings. For more details, please contact your
local Sony sales office or authorized dealer.
JPEG
Formulas for Calculating Bandwidth and Storage
Capacity
Bandwidth =
(Mb/s)
Image data size
(KB)
frame
#
frames
sec
8 bits
Byte
1 M
Byte
1000
KB
Storage capacity =
(MB/hour)
Image data size
(KB)
frame
#
frames
sec
3600
sec
hour
1 MB
1000
KB
Storage capacity =
(GB/day)
Storage capacity
(MB)
hour
24
hours
day
1 GB
1000
MB
Sample Calculation for a Four-Camera Installation
*5
Resolution
Image fps
*6
Bandwidth
Required Required
Compression data
size
storage
storage
level
capacity/hour
capacity/day
Camera1
VGA
30 KB
30 fps
7.2 Mb/s
3240 MB
77.76 GB
Level 5
Camera2
QVGA
7.5 KB
10 fps
0.6 Mb/s
270 MB
6.48 GB
Level 5
Camera3
QVGA
4.5 KB
10 fps
0.36 Mb/s
162 MB
3.88 GB
Level 2
Camera4
QQVGA
1.875 KB
20 fps
0.3 Mb/s
135 MB
3.24 GB
Level 5
Totals
8.46 Mb/s
3807 MB/hour
91.36 GB/day