Panasonic KX-NTV150 User Manual page 76

2 Software
Maximum frame rate
This limits the maximum refresh frame rate per second. Set the frame rate higher for smoother video quality
and for recognizing moving objects in the field of view.
If the power line frequency is set to 50 Hz, the selectable frame rates are 5 fps, 8 fps, 10 fps, 15 fps, 20 fps,
and 25 fps. If the power line frequency is set to 60 Hz, the frame rates are selectable at 5 fps, 8 fps, 10 fps, 15
fps, 20 fps, 25 fps, and 30 fps. You can also select Customize and manually enter a value.
The frame rate will decrease if you select a higher resolution.
Note
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If CPU loading get high, due to performance limitation, framerate maybe can not meet the current
setting.
Intra frame period
Determine how often to plant an I frame. The shorter the duration, the more likely you will get better video
quality, but at the cost of higher network bandwidth consumption. Select the intra frame period from the
following durations: 1/4 second, 1/2 second, 1 second, 2 seconds, 3 seconds, and 4 seconds.
Video quality
Constant bit rate:
Target bit rate:
A complex scene generally produces a larger file size, meaning that higher bandwidth will be needed for data
transmission. To regulate the bandwidth consumption and storage space for recording videos, you can select
the Constant bit rate methodology. The firmware will try its best to contain the size of video packets within the
limitation of a constant bit rate. This methodology enables easier calculation of the network bandwidth and
storage space required for live viewing or video recording.
The bandwidth utilization is configurable to match a selected level, resulting in mutable video quality
performance. The bit rates are selectable at the following rates: 20 Kbps, 30 Kbps, 40 Kbps, 50 Kbps, 64 Kbps,
128 Kbps, 256 Kbps, 512 Kbps, 768 Kbps, 1 Mbps, 2 Mbps, 3 Mbps, 4 Mbps, 6 Mbps, and 8 Mbps. You can
also select Customize and manually enter a value.
Fixed quality: On the other hand, if Fixed quality is selected, all frames are transmitted with the same quality;
bandwidth utilization is therefore unpredictable. The video quality can be adjusted to the following settings:
Medium, Standard, Good, Detailed, and Excellent. You can also select Customize and manually enter a value.
Maximum bit rate: With the guaranteed image quality, you might still want to place a bit rate limitation to
control the size of video streams for bandwidth and storage concerns. The configurable bit rate starts from 1
Mbps to 8 Mbps. The Maximum bit rate setting in the Fixed quality configuration can ensure a reasonable and
limited use of network bandwidth. For example, in low light conditions where a Fixed quality setting is applied,
video packet sizes can tremendously increase when noises are produced with electrical gain.
You may also manually enter a bit rate number by selecting the Customized option.
76 User's Manual