JVC LST0819-001A Instructions Manual page 34

Network Setting
Network Requirements
(continued)
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 to 8000 kbps)
Restrictions on the Number of Distributions for
Camera
The maximum number of distributions for this unit is
determined by the settings as well as requirements from
the client.
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 at
numb
maximum bit
rate
distrib
utions
1 Mbps and 20
below
5 Mbps and 4
below
10 Mbps and 2
below
Larger than 10 1
Mbps
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.
Maxi
mum
Total maximum
er of bit rate
20 Mbps
20 Mbps
20 Mbps
Maximum
configurable value
(24 Mbps)
When distributing only MPEG4 data
numb
Preset bit rate
distrib
utions
0.6 Mbps and 20
below
3 Mbps and 4
below
6 Mbps and 2
below
Larger than 6 1
Mbps
When both JPEG and MPEG4 images are
distributed simultaneously, distribution up to two
clients for JPEG and MPEG4 respectively is
possible. However, distribution requests that
exceed a total bit rate of 20 Mbps will be denied.
Maximum
number of
Total bit rate
distributions
for JPEG
20 Mbps and 2
below
Insufficient network bandwidth
When there is insufficient bandwidth, the number of
JPEG frames (frame rate) that the client can acquire will
decrease. Delay will also occur in the distribution of
images. In the case of MPEG4, noise interference may
occur and playback may fail.
Maxi
mum
Total maximum
er of bit rate
12 Mbps
12 Mbps
12 Mbps
Maximum
configurable value
(8 Mbps)
Maximum
number of
distributions
for MPEG4
2