Network Requirements
●Ensure that there is sufficient network bandwidth for the data volume to be sent out by
●Data volume to be sent by
●The maximum bit rate for transmission is about 20 Mbps.
Estimation of Total Bit Rate
The total JPEG bit rate from
Bit Rate of JPEG Stream
The JPEG file size per frame varies with the encoding settings as well as input video signals. The following table may be used as a reference. When VFS is selected, the quantization table during JPEG encoding will be maintained, and the file size will increase/decrease according to the input signals. When AFS is selected, encoding will be performed such that the target file size is the average size of multiple JPEG images.
Picture Quality | VGA File | QVGA File | ||
Control Method | Size | Size | ||
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VFS | 1 (High) | 80 KB | 27 KB | |
(Variable |
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2 | 60 KB | 20 KB | ||
File Size) | ||||
| 3 | 40 KB | 13 KB | |
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| 4 (Medium) | 30 KB | 10 KB | |
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| 5 | 25 KB | 8 KB | |
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| 6 | 20 KB | 7 KB | |
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| 7 (Low) | 15 KB | 5 KB | |
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AFS |
| Selectable | Selectable | |
| between | between | ||
(Average File Size) | 10 KB - | 3 KB - | ||
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| 100 KB | 33 KB | |
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The maximum number of distributions varies with the bit rate settings as well as the client’s requested frame rate. Up to 20 streams can be distributed (including multicast). The total frame rate refers to the sum of these frame rates.
For example, when 10 fps is requested by two clients, and in addition, multicast is transmitted at a rate of 10 fps, the total frame rate will be:
10 + 10 + 10 = 30 fps
If the JPEG file size per frame is 30 KB, then the total bit rate will be:
30 KB x 30 fps = 900 KB/s = Approx. 7.2 Mbps
Bit Rate of MPEG4 Stream
You can select either the Variable Bit Rate (VBR) or Constant Bit Rate (CBR) system for MPEG4 stream.
When the VBR system is selected, the bit rate varies according to the condition of the input video signals. The VBR system delivers a stable picture quality, but forecast of the bit rate is difficult. When the CBR system is selected, encoding is performed at a fixed bit rate regardless of the condition of the input video signals. The picture quality varies under the CBR system, but the bit rate can be easily forecast.
You can specify an estimated bit rate for both VBR and CBR. (64 kbps - 8000 kbps)
Restrictions on the Number of
Distributions for
The maximum number of distributions for
When only JPEG images are distributed, the maximum number of distributions is determined based on the highest bit rate within the stream. When a distribution request that exceeds the maximum number of distributions is received, this request is denied. For example, if Client A requests for and receives data at 1 Mbps, while Client B requests for and receives data at
5 Mbps, the maximum number of distributions is
4 streams according to the table below.
Maximum number of distributions when only JPEG data is distributed
Distribution | Maximum | Total |
at maximum | number of | maximum bit |
bit rate | distributions | rate |
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1 Mbps and | 20 | 20 Mbps |
below |
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5 Mbps and | 4 | 20 Mbps |
below |
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10 Mbps and | 2 | 20 Mbps |
below |
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Larger than | 1 | Maximum |
10 Mbps |
| configurable |
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| (24 Mbps) |
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