A picture signal processor, a picture display and a picture display system are disclosed. The picture signal processor includes: a frame-rate conversion section performing a frame-rate-increasing conversion, which brings an over-double frame rate, on each of a plurality of time-series picture streams each Including a plurality of unit pictures, and providing frame-rate-converted picture streams to a display section which displays pictures through performing time-divisional switching of picture streams from one to another in order; and a shutter control section controlling a shutter eyeglass device to perform an open/close operation in synchronization with a display switching timing between the frame-rate-converted picture streams in the display section.