A request recognition section (373) recognizes an input operation for a source switching request to switch broadcast program contents extracted from broadcast waves to contents recorded in a recording and reproducing apparatus to display the contents on a display unit (350). Values of a plurality of setting factors such as brightness, contrast, and black level related to picture quality, which correspond to the source to be switched, specified corresponding to the previous contents source are read from a memory (360). Predefined values of the setting factors set corresponding to the previous contents source are compared with values newly read, and the values of the respective setting factors are sequentially changed stepwise. It is possible to prevent a flicker on a screen caused by a sudden change in the picture quality during processing of changing the picture quality, thereby favorably adjusting the picture quality.