TVG-Series System Guide v1-4 - SerVision

SerVision
TVG System Guide
the unit's speakers on-site. (At present, the MultiClient and the Symbian S60 cell-phone client applications
support this feature.)
• Audio In settings: Enable the microphone and control its volume. When a microphone is connected and
enabled, audio from the site can be heard along with live and recorded video.
GPS Settings
GPS makes it possible to track the location of an MVG or CVG-M unit by means of the unit’s built-in GPS
receiver. For additional information, see Configuring GPS, page 26. For information about viewing the unit's
location on a map, and tracking the route taken by the unit, please refer to the MultiClient User Guide.
Ignition-Off Shut-Down
The Ignition settings define whether the MVG or CVG-M unit should automatically shut down when the vehicle
ignition is turned off and, if so, how long the unit should continue operating after the ignition is turned off before it
shuts down.
Download Optimizations
Downloading recorded video uses system resources that would otherwise be available for other functions such as
recording or streaming live video. Download optimization settings are used to tweak the allocation of system
resources between downloading and other system processes. The following options can be selected:
• Stop Recording on Download: Stops all video recording when video is being downloaded from the TVG.
This option increases the download speed, because it allocates more of the unit’s resources to the download
task. However, it also means that there may be gaps in the recorded video at the times that the video is
downloaded.
• Block New Connections while Downloading: Prevents the streaming of new live or recorded video
streams to a client application while downloading of recorded video is taking place. When this option is not
selected, the process of downloading may take somewhat longer to be completed. In addition, the framerate of
video displayed in the client may be reduced at times while the download is in progress. When this option is
selected, transmission of new live or recorded video streams to client applications does not take place while
downloading is underway, but existing streams are not closed.
• Disable TV-Out While Downloading: If a CCTV monitor is connected to the TVG, stops streaming of
video to the monitor while downloading of recorded video is taking place
Additional System Settings
A number of other system settings can be configured in the General System Settings screen:
• Video Authentication: Adds a digital signature to each frame of video captured by the system. This
signature makes it possible to identify frames that have been tampered with. When a SerVision client
application plays video that has a digital signature and discovers a frame that has been changed from its
original state, the status of the stream indicates that the stream was modified. (Note: Only the current versions
of the MultiClient and the Player support this feature.)
• Outline Switching: Defines whether the system can activate different outlines automatically and, if so,
what type of trigger will cause the system to switch to a different outline, sensor events (from Sensor 1) or a
schedule. If neither type of automatic outline switching is selected, you can manually change the active outline
at any time. For additional information, see Defining Alternate Outlines, page 118.
• LAN Optimization: Speeds up the transmission of live video from the TVG to PCs on the same LAN. This
feature is not recommended for use with other types of client connections – internet, cellular, etc.
Configuring System Settings 20