Abstract: A method for managing multimedia data by a contents server comprises the steps of: generating one or more chunks from an input image; generating chunk information of the input image including a list of the generated chunks; performing an identity check among chunks on the basis of the chunk information of the input image and chunk information stored in the contents server; and updating the stored chunk information according to a result of the identity check, wherein the chunks are a meaningful scene unit in an image.

Abstract: A method for managing multimedia data by a contents server comprises the steps of: generating one or more chunks from an input image; generating chunk information of the input image including a list of the generated chunks; performing an identity check among chunks on the basis of the chunk information of the input image and chunk information stored in the contents server; and updating the stored chunk information according to a result of the identity check, wherein the chunks are a meaningful scene unit in an image.

Abstract: The bench press allows the user to control the increase and decrease of weights without assistance, so as to achieve maximal physical effect and can safely exercise. The bench press includes a frame having a bench on which the user lies and a support for supporting a barbell, a first cable having an end that is connected to the barbell and hanging the barbell through a first pulley that is rotatably installed in the frame, a second pulley, to which the other end of the first cable is connected, rotatably installed in the frame, a cam-shaped pulley rotated together the second pulley, a second cable having an end connected to the cam-shaped pulley, and a foothold, to which the other end of the second cable is connected, provided in the frame so that the user moves the foothold to pull the second cable.

Abstract: A bench press apparatus is provided with a barbell having weights, a counterweight, a cable whose one end is connected to the barbell with the other end connected to the counterweight, the cable movably supported by a frame, a barbell stopper for stopping a downward movement of the barbell, and a weight load reduction unit for reducing a weight load applied to an exerciser by the weights in order for the exerciser to exercise with a reduced weight load.