Network Requirements (continued)
Bit Rate of Audio
Only 1 audio data stream can be received. Data volume for 1 audio stream is 64 kbps. Audio data volume may be calculated using the following formula.
64 kbps x no. of streams
The number of streams is the total number of streams sent via TCP (number of clients), streams sent via multicast, and stream received by camera
(Example) When camera sends out 2 audio streams and receives 1 audio stream, data volume will be as follows. 64 kbps x 3 = 192 kbps
Restrictions on the Number of
Distributions for camera
The maximum number of distributions for camera is determined by the settings as well as requirements from the client.
For JPEG distribution, you can select either “Frame Rate Priority” mode or “Client number Priority” mode. “Frame Rate Priority” mode distributes JPEG images according to the frame rate requested by the client. The maximum number of distributions is determined based on the highest bit rate within the distribution streams. For “Client number Priority” mode, if there are requests from multiple clients, JPEG images are distributed in a lower frame rate than that requested to cater to multiple clients. It can accept 20 distribution requests as the maximum number of clients.
When Frame Rate Priority Mode is Selected
JPEG images are distributed at the frame rate requested by the client.
When a distribution request that exceeds the maximum number of distributions is received, this request is denied.
●When only JPEG images are distributed
For example, if Client A requests for JPEG at 1 Mbps, while Client B requests for JPEG at 5 Mbps, additional 2 streams (total 4 streams) of distribution are possible for request below 5 Mbps.
Maximum number of distributions when only JPEG data is distributed
Distribution | Maximum | Total |
at maximum | number of | maximum bit |
bit rate | distributions | rate |
|
|
|
1 Mbps and | 20 | 20 Mbps |
below |
|
|
|
|
|
5 Mbps and | 4 | 20 Mbps |
below |
|
|
|
|
|
10 Mbps and | 2 | 20 Mbps |
below |
|
|
|
|
|
Larger than | 1 | Maximum |
10 Mbps |
| configurable |
|
| value |
|
| (24 Mbps) |
|
|
|
●When both JPEG and MPEG4 images are distributed
When both JPEG and MPEG4 images are distributed simultaneously, distribution up to two clients for JPEG and three clients for MPEG4 respectively is possible.
However, distribution requests that exceed a total bit rate of 20 Mbps will be denied.
Maximum number of distributions when JPEG and MPEG4 data is distributed
Maximum number | Maximum number |
|
of distributions | of distributions for | Total bit rate |
for JPEG | MPEG4 |
|
|
|
|
2 | 3 | 20 Mbps and |
|
| below |
|
|
|
●When only MPEG4 images are distributed
The maximum number of distributions is determined by the preset bit rate. When a distribution request that exceeds the maximum number of distributions is received, this request is denied.
When distributing only MPEG4 data
Preset bit | Maximum | Total maximum | |
number of | |||
rate | bit rate | ||
distributions | |||
|
| ||
|
|
| |
0.6 Mbps and | 20 | 12 Mbps | |
below |
|
| |
|
|
| |
3 Mbps and | 4 | 12 Mbps | |
below |
|
| |
|
|
| |
4 Mbps and | 3 | 12 Mbps | |
below |
|
| |
|
|
| |
6 Mbps and | 2 | 12 Mbps | |
below |
|
| |
|
|
| |
Larger than | 1 | Maximum | |
6 Mbps |
| configurable value | |
|
| (8 Mbps) | |
|
|
|
When Client number Priority Mode is Selected
●When only JPEG images are distributed
If the distribution request would be accepted in the frame rate priority mode, distribution works in the same way as frame rate priority mode, where JPEG images are distributed at the frame rate requested by the client. If the distribution request would be denied in the frame rate priority mode, the frame rate is controlled such that the maximum bit rate is as shown in the following table, to accept distribution requests from up to 20 clients. For example, if Client A and B request for JPEG at 10 Mbps, and Client C requests for JPEG at 5 Mbps, the frame rate will be reduced such that the distribution bit rate to each client is less than 5 Mbps.
Maximum bit rate when only JPEG data is distributed
Current number of | Maximum bit rate | Total maximum bit |
distributions |
| rate |
|
|
|
2 and below | 10 Mbps | 20 Mbps |
|
|
|
3 to 4 | 5 Mbps | 20 Mbps |
|
|
|
5 to 20 | 1 Mbps | 20 Mbps |
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