84Parameter DescriptionBacklight ModeThere are several modes: Disabled: no backlight. Backlight: prevent silhouette appearing in dark part of thesubject against the light. Wide dynamic: according to ambient brightness, the systemreduces brightness of high-brightness area, increasesbrightness of low-brightness area, and thus displays bothareas clearly. Inhibition: the system inhibits brightness of high-brightnessarea of the image, reduces halo size and thus reducesbrightness of the entire image.Mirror Select “On”; the image will be turned over from left to right.Flip Select “On”; the image will be turned over from top to bottom.Table 7-127.9.2 Audio SetSelect “System Config >Video Set>Audio Set”.Step 1The system displays “Audio Set” interface, as shown in Figure 7-46.Figure 7-46Adjust VTO mic volume and beep volume.Step 27.10 IPC InfoAdd IP camera (IPC) info and support max. 32 channels. IPC info will be synchronized withVTH automatically, in order to facilitate VTH monitoring.Select “System Config > IPC Info”. The system displays “IPC Info” interface, as shown in Figure7-47.