<p>An editing operation in performing an editing processing that a plurality of AV signals which are audio signals or video signals are mixed or switched is easily and intuitively performed. An AV processor (30) displays a plurality of video signal specifying areas (V) for specifying the output of each of the video signals in response to inputted video signals on a touch panel (TP), performs the mixing of the video signals on the basis of the touch position of the touch panel (TP), and also performs the switching of the video signals according to the movement of the touch position.</p>
