A transmission device comprising: an acquisition unit configured to acquire distortion information which indicates distortion of an information signal which is based on nonlinearity of a transmission path of the information signal, the distortion information being used for a reception device that receives the information signal to compensate distortion of the received information signal; a generation unit configured to generate a control signal which includes the acquired distortion information; and a transmission unit configured to transmit the control signal which includes the distortion information together with the information signal via the transmission path, characterized in that the distortion information is expressed by any type of information including absolute coordinate information of all transmission signal points after distortion, absolute coordinate information of some transmission signal points after distortion, relative coordinate information of all other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, relative coordinate information of some other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, data of a graph with respect to input and output characteristics of a transmission path, relative coordinates of a reception signal point that has been affected by distortion of a transmission signal point, or a magnification ratio and a rotation angle of a radius with respect to an origin. an acquisition unit configured to acquire distortion information which indicates distortion of an information signal which is based on nonlinearity of a transmission path of the information signal, the distortion information being used for a reception device that receives the information signal to compensate distortion of the received information signal; a generation unit configured to generate a control signal which includes the acquired distortion information; and a transmission unit configured to transmit the control signal which includes the distortion information together with the information signal via the transmission path, characterized in that the distortion information is expressed by any type of information including absolute coordinate information of all transmission signal points after distortion, absolute coordinate information of some transmission signal points after distortion, relative coordinate information of all other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, relative coordinate information of some other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, data of a graph with respect to input and output characteristics of a transmission path, relative coordinates of a reception signal point that has been affected by distortion of a transmission signal point, or a magnification ratio and a rotation angle of a radius with respect to an origin. absolute coordinate information of all transmission signal points after distortion, absolute coordinate information of some transmission signal points after distortion, relative coordinate information of all other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, relative coordinate information of some other transmission signal points with respect to a transmission signal point that serves as a reference after distortion, data of a graph with respect to input and output characteristics of a transmission path, relative coordinates of a reception signal point that has been affected by distortion of a transmission signal point, or a magnification ratio and a rotation angle of a radius with respect to an origin. <EOS>