A television receiver connectable with a counterpart device to input video contents comprising: an HDMI interface comprising a consumer electronics connection, CEC, line and a video transmission line so that data is transmitted via the CEC line and the video transmission line; a control data I/O unit configured to input and output control data via the CEC line; a video data input unit configured to input video data via the video transmission line; a control feature corresponding memory unit configured to store correspondence of control data that can be input and output via the control data I/O unit; a control unit that controls input and output of the control data via the control data I/O unit and that controls input of the video data via the video data input unit; wherein the control data I/O unit is arranged to read out correspondence information of the control data stored on the control feature corresponding memory unit in the counterpart device via the transmission line, is arranged to compare the correspondence information with information stored on the control feature corresponding memory unit in the same device, and is arranged to determine control data that can be output via the control data I/O unit in the same device based on the resulting comparison; and a notification processing unit adapted to notify that a counterpart device is non-compliant when the counterpart device is determined as non-compliant based on the comparison obtained by the control data I/O unit, and characterized in that said notification processing unit is further adapted to display a complied feature list established on the basis of said comparison operation performed by the control data J/O unit on a display screen of the television receiver, in which a non-complied feature is displayed in a manner differing from the other features. an HDMI interface comprising a consumer electronics connection, CEC, line and a video transmission line so that data is transmitted via the CEC line and the video transmission line; a control data I/O unit configured to input and output control data via the CEC line; a video data input unit configured to input video data via the video transmission line; a control feature corresponding memory unit configured to store correspondence of control data that can be input and output via the control data I/O unit; a control unit that controls input and output of the control data via the control data I/O unit and that controls input of the video data via the video data input unit; wherein the control data I/O unit is arranged to read out correspondence information of the control data stored on the control feature corresponding memory unit in the counterpart device via the transmission line, is arranged to compare the correspondence information with information stored on the control feature corresponding memory unit in the same device, and is arranged to determine control data that can be output via the control data I/O unit in the same device based on the resulting comparison; and a notification processing unit adapted to notify that a counterpart device is non-compliant when the counterpart device is determined as non-compliant based on the comparison obtained by the control data I/O unit, and characterized in that said notification processing unit is further adapted to display a complied feature list established on the basis of said comparison operation performed by the control data J/O unit on a display screen of the television receiver, in which a non-complied feature is displayed in a manner differing from the other features.