Stereoscopic image reproducing apparatus, and a stereoscopic image display device

A video plane generation unit decodes stream data into a pair of left-view and right-view video planes, and alternately outputs the video planes in a 3D display mode, and repeatedly outputs either one of the pair of video planes in a pseudo 2D display mode. An image plane generation unit generates a pair of left-view and right-view image planes having different display locations with respect to a horizontal direction of an OSD, and alternately output the pair of image planes, the display locations to be determined according to a depth to be perceived of the OSD. The pseudo 2D display control unit instructs the video plane generation unit to operate in the 3D display mode in a period where the image plane generation unit does not output the pair of image planes, and instructs the video plane generation unit to operate in the pseudo 2D display mode in a period where the image plane generation unit outputs the pair of image planes. The adder unit combines a video plane generated by the video plane generation unit and an image plane generated by the image plane generation unit onto a single frame, and outputs the frame.