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ENR-1000 Series System Administrator's Manual
Video Display Performance
On a live or playback screen, ENR handles displayed video based on the combination of the
following factors, which you should put into consideration when configuring your view layout:
(1) The number of channels
The
(2)
format of video stream, e.g. resolution and frame rate.
To balance the loading of the system, ENR will decode only I frames
CPU usage is critical. The video stream is still recorded at its original frame rate no matter at
what quality it is displayed.
To acquire good video display quality, however, it is suggested that you try to use the layout
containing just enough channels, or make use of Sequence Patrol function.
Local Live View / Playback
On local display, ENR determines when to enter Decode-I mode according to these key
references – (1) your selection of Layout and (2) the Video Resolution. A layout consisting
of more channels and high-resolution streams are considered more CPU consuming, which
is more likely to trigger Decode-I mode. Take ENR-1100 for example, by switching the live
screen layout from 4x4 style (16 channels) to Quad style (4 channels), the video will appear
much smoother.
1
2
4
1
2
4
1
2
4
On a local live or playback screen, the conditions below ensures the live streaming to be
displayed at a smooth quality(12~30 FPS); otherwise, ENR will decode only I-frames for
each channel
.
Model
Layout Style
ENR-1000
1, 2, 4
ENR-1100
1, 2, 4, 1+5, 2+4, 1+7, 9
ENR-1200
1, 2, 4, 1+5, 2+4, 1+7
(*2)
(*1)
A video sequence is composed of a series of GOP (Group of Pictures). Among these
pictures, I-frame (Intra-coded picture) is a fully specified picture with complete image
information, while P-frame and B-frame hold only partial image information.
(*2)
ENR-1200 will automatically turn all channels into Decode-I Mode when the number
of layout channels exceeds 8.
(*3)
ENR-1200 will automatically turn a channel into Decode-I Mode when its video
resolution is above 1280 x 720 pixels.
of your current layout
9
1
2
1
6
9
1
2
1
6
9
1
2
1
6
or below pixels 1920 x 1080 pixels
1280 x 720 or below pixels on live screen
1920 x 1080 or below pixels on playback screen
13
for viewing when
(*1)
6
8
1
3
6
6
8
1
3
6
6
8
1
3
6
Video Resolution
1
0
1
0
1
0
(*3)
(*3)
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