| 摘要 |
PURPOSE: A volume control system for a guide broadcast is provided to automatically adjust announcement volume according to the number of passengers present. CONSTITUTION: An image analyzer(50) partitions an image signal of a passenger photographed by a camera. The image analyzer differently sets a partition area and a partition number according to a photographing distance. When the photographing distance is short, the partition area is large and the partition number is small. When the photographing distance is long, the partition area is small and the partition number is large. A volume adjustment controller(60) controls the volume of an audio mixer by a selected output volume. |
