Siqura TC620-PID, Руководство пользователя

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TC620-PID
Page 58
Item Description
Bit rate Constant bit rate mode
only The speed of the digital transmission - that is, the amount of
information transferred/processed per unit of time.
Actual bit rate Constant quality mode
only This field is dynamically updated with the current bit rate to
provide feedback on the bit rate that is used on average
with the current
Quality setting.
Quality Constant quality mode
only Reflects the amount of compression. Generally speaking:
the higher the quality setting, the lower the compression
ratio and the more bits are consumed. This means a
trade-off has to be found between the desired quality level
and available bandwidth.
PID Overlay PID alarms and PID configuration can be shown as overlays over the camera image
in the preview.
Profile Preset combinations of settings for specific purposes. When a profile has been
selected, changing one of its defined parameters sets the Profile box to '--', to
indicate that a custom profile has been configured. When a freely chosen parameter
value combination matches a preset profile, the name of the profile shows in the
Profile box.
Show Preview>> Click to view live images and see the effect of the current settings.
<<Hide Preview Closes the preview. This may improve webpage responsiveness.
Volume Move the slider to control audio volume.
Mute Select/clear this box to mute/unmute audio.
12.3.2 Parameter value combinations
Set sensible combinations of video bit rate mode, resolution, GOP length, and frame and bit
rates. When you set and save these values, inappropriate value combinations are 'corrected' by
automatic selection of the closest suitable combination.
Important:
If in doubt about the effects of specific encoder settings, you are advised to select the
profile offering the closest match to your required application.
12.3.3 Constant Quality Mode configuration
Constant Quality mode (CQM) can be used in situations with intermittent increases of movement
in camera images. This mode provides better pictures when quickly panning a PTZ camera, for
example. Siqura recommends the following strategy for Constant Quality mode configuration.

To configure CQM settings
1. In Encoder Settings , open the
Video bit rate mode
list, and then select
Constant quality
.
2. With the video source connected and the encoder enabled, go to the Quality field and set the
desired quality (range: [0 ... 100%]), aided by the visual feedback in the Preview.
3. Press
Save
to store your settings.
The Actual bit rate field is dynamically updated with the current bit rate.
4. Determine if the average bit rate used with the current Quality setting is acceptable. If not,
modify the Quality setting.
5. To set the upper limit for the bit rate, open the
Advanced Settings
section and use the CQM
max bit rate field to specify the maximum bit rate.
Generally, it is not necessary to change the default setting of 6000 kbit/s, unless there are
physical limitations on the network.
6. Press
Save
to store your settings.