An image processing system and method to resize image data from two sources of image data. Pilot pressure to a tilting control unit of a variable displacement hydraulic pump is controlled by a solenoid valve. The surface may have a concave area where the speakers and the sound barrier are mounted. If the user selects the do-not-disturb mode, the system blocks the message and informs the caller that the user does not wish to be disturbed. The parity generator generates a input parity determined based on the input data and a certain preset parity value.