A vestigial sideband modulation transmission system and, a method for encoding an input signal in the system are disclosed. A data packet to be processed is evaluated to determine if the data packet is an erroneous data packet. The formation of connected components from this filtered image defines the edges of character shapes. The blade guides an air flow caused by rotation of the disk toward an outer edge of the disk. The factor is resolved as a function of the first high frequency value and the desired gain.