I-View FDMO-2MIP-20XIR IP SpeedDome Network Camera - Manual (Page 48)

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Privacy Mask: Privacy mask enables you to cover certain areas on the live
video to prevent certain spots in the surveillance area from being live viewed
and recorded. Enable Privacy mask function, click and drop the left button of
Mouse for setup up the mask.
Allow setup several mask areas, but the total areas cannot exceed 5% of
image.
Video system: Choice the video system for the TV out (Composite signal). .
The maximum frame rate will be 30 fps when choice the NTSC mode and
25fps at the PAL mode.
ROI: ROI (Region of Interest) encoding is used to enhance the quality of
images which are specified in advance. These ROI areas image will first
priority to send out for internet transmission when bandwidth is not enough.
The ROI mode is not effect when enable the VBR mode.