When image data obtained by an imaging apparatus such as a digital camera are sent via a wireless communication system, power consumption by a wireless communication apparatus installed in the imaging apparatus is reduced as much as possible. A geometric region is constructing having a size that is the minimum size necessary to contain the source and all the nodes. The speaker-specific recognition units are used to compute distribution values to train the voice signal. In at least one embodiment, the intelligent mounting track system can include a plurality of sensors mounted along the rack surfaces that collectively or individually uniquely identify which spaces are occupied.