Abstract: There are provided a wireless communicator that performs channel scanning, in a period during which wireless communication is not performed, to detect a frequency channel currently used by a surrounding wireless communication device; a frequency channel information storage that stores frequency channel information indicating the frequency channel detected by the wireless communicator; and a travel information acquisition unit that acquires travel information indicating motion of a vehicle. A switch controller performs switching control of a frequency channel used by the wireless communicator in accordance with the frequency channel information and the travel information acquired by the travel information acquisition unit.

Abstract: There are provided a wireless communicator that performs channel scanning, in a period during which wireless communication is not performed, to detect a frequency channel currently used by a surrounding wireless communication device; a frequency channel information storage that stores frequency channel information indicating the frequency channel detected by the wireless communicator; and a travel information acquisition unit that acquires travel information indicating motion of a vehicle. A switch controller performs switching control of a frequency channel used by the wireless communicator in accordance with the frequency channel information and the travel information acquired by the travel information acquisition unit.

Abstract: A moving image display includes a data forming unit 10 for extracting encoded data from received data; a decoding unit 13 for decoding moving image data from the encoded data extracted by the data forming unit 10, and for detecting not only error information at the decoding, but also visual characteristic information indicating a feature of a picture to be displayed; a storage unit 14 for storing the moving image data decoded by the decoding unit 13 as still image data; and a switching control unit 15 for outputting, as display data, the moving image data decoded by the decoding unit 13 or the still image data stored in the storage unit 14 in accordance with the error information and visual characteristic information detected by the decoding unit 13.