The present invention relates to an ultrasound imaging system. Huffman codes associated with the various Q matrices permit the particular Q matrix used to quantize a given data block to be signaled by a decoder as an end-of-block code. The mounting member is a galvanized steel plate or shaped rod. An opening is provided in the shape-retaining sheet so as to face a lateral face of a folded body of the airbag on the passenger side. Additionally, each game configuration may be saved to be implemented in various gaming machines. Network-initiation of area-based positioning of a roaming terminal is discriminated according to a proxy mode and a non-proxy mode, and area-based positioning for the roaming terminal is performed in various manners according to whether an SLP for performing the positioning procedure with respect to the discriminated modes is a V-SLP or an H-SLP.