Image signal processing apparatus

摘要

To selectively display image signals of plural channels and detect motion of the channels for efficient display. The present invention is a video signal switching apparatus capable of detecting motion comprising: first video signal input modules 11 - 1, 12 - 1, and 13 which input video signals of plural channels in a time division manner; first video signal storage modules 15 - 1 and 16 - 1 which store the video signals in a storage module; a video signal output module 17 which outputs video signals of plural channels stored in the video signal storage module as consecutive video signals; second video signal input modules 11 - 1 and 12 - 1 which input video signals of plural channels in a time division manner; a video signal reduction module 14 which reduces the video signals; second video signal storage modules 15 - 2 and 16 - 2 which store reduced video signals in a storage module; and a motion detection module 18 which reads out reduced video signals of different times of two or more identical channels from the second video signal storage module to detect motion and produce motion information.