A method of determining new luminance value data based on original luminance value data to be displayed on a matrix display device, where the luminance value data are coded in sub-fields, the sub-fields including a group of most significant sub-fields and a group of least significant sub-fields, wherein a common value for the least significant sub-fields is determined for a set of lines. The system maintains a count at each of a plurality of packet-receiving components of the network, the count indicating a number of CRC or other errors that have been detected by each component. The airfuel ratio control module controls an airfuel ratio of an engine based on the first amount, the second amount, and a temperature of a substrate disposed in the second SCR catalyst. In yet another aspect, a process for creating a liner top seal is provided in which the liner is set by expanding a protrusion in an upper end of a tubular into substantial contact with an inner diameter of the wellbore, and the upper end of the tubular is then reformed and expanded into substantial contact with the inner diameter of the wellbore. The bearing also comprises a first boss part which is disposed on an outer portion of the first outer wheel and has a plurality of fixing holes, and a second boss part which is disposed on an outer edge portion of the second wheel and has a plurality of hook parts, where the plurality of hook parts are inserted into the plurality of fixing holes. When the repeater side power source control circuit detects that a separate device has stopped transmitting the predetermined signal, the repeater side power source control circuit sets the power source which is delivered to the transmissionreception circuit, to the off-state level.