A stereoscopic video playback device comprising: a video plane generation unit (174A, 176) operable to decode stream data into a pair of left-view and right-view video planes, and alternately output the pair of left-view and right-view video planes in a three-dimensional display mode; an image plane generation unit (175, 177A, 177B, 178) operable to generate a pair of left-view and right-view image planes having an OSD (On-screen Display) or a pop-up display at different display locations in a horizontal direction, and alternately output the pair of left-view and right-view image planes, the display locations to be determined from a depth of the OSD or the pop-up display to be perceived; and an adder unit operable to combine a video plane and an image plane into a single frame and output the frame each time the video plane generation unit (174A, 176) outputs the video plane and the image plane generation unit (175, 177A, 177B, 178) generates the image plane, characterized in that the video plane generation unit (174A, 176) is further operable to repeatedly output only one of the pair of left-view and right-view video planes in a pseudo two-dimensional display mode, and characterized by a pseudo 2D display control unit operable to: instruct the image plane generation unit (175, 177A, 177B, 178) to start output of the pair of left-view and right-view image planes having an OSD or a pop-up display, instruct the video plane generation unit (174A, 176) to change from the 3D display mode to the pseudo 2D display mode in conjunction with the image plane generation unit starting the output of the pair of left-view and right-view image planes, instruct the image plane generation unit (175, 177A, 177B, 178) to stop the output of the pair of left-view and right-view image planes, and instruct the video plane generation unit (174A, 176) to return from the pseudo 2D display mode to the 3D display mode in conjunction with the image plane generation unit stopping the output of the pair of left-view and right-view image planes. a video plane generation unit (174A, 176) operable to decode stream data into a pair of left-view and right-view video planes, and alternately output the pair of left-view and right-view video planes in a three-dimensional display mode; an image plane generation unit (175, 177A, 177B, 178) operable to generate a pair of left-view and right-view image planes having an OSD (On-screen Display) or a pop-up display at different display locations in a horizontal direction, and alternately output the pair of left-view and right-view image planes, the display locations to be determined from a depth of the OSD or the pop-up display to be perceived; and an adder unit operable to combine a video plane and an image plane into a single frame and output the frame each time the video plane generation unit (174A, 176) outputs the video plane and the image plane generation unit (175, 177A, 177B, 178) generates the image plane, characterized in that the video plane generation unit (174A, 176) is further operable to repeatedly output only one of the pair of left-view and right-view video planes in a pseudo two-dimensional display mode, and characterized by a pseudo 2D display control unit operable to: instruct the image plane generation unit (175, 177A, 177B, 178) to start output of the pair of left-view and right-view image planes having an OSD or a pop-up display, instruct the video plane generation unit (174A, 176) to change from the 3D display mode to the pseudo 2D display mode in conjunction with the image plane generation unit starting the output of the pair of left-view and right-view image planes, instruct the image plane generation unit (175, 177A, 177B, 178) to stop the output of the pair of left-view and right-view image planes, and instruct the video plane generation unit (174A, 176) to return from the pseudo 2D display mode to the 3D display mode in conjunction with the image plane generation unit stopping the output of the pair of left-view and right-view image planes. instruct the image plane generation unit (175, 177A, 177B, 178) to start output of the pair of left-view and right-view image planes having an OSD or a pop-up display, instruct the video plane generation unit (174A, 176) to change from the 3D display mode to the pseudo 2D display mode in conjunction with the image plane generation unit starting the output of the pair of left-view and right-view image planes, instruct the image plane generation unit (175, 177A, 177B, 178) to stop the output of the pair of left-view and right-view image planes, and instruct the video plane generation unit (174A, 176) to return from the pseudo 2D display mode to the 3D display mode in conjunction with the image plane generation unit stopping the output of the pair of left-view and right-view image planes.