Techniques for business event processing are presented. Index ANDing is used to construct a filter for filtering a first of the tables in accordance with the local predicates. Then, the second drive 520 stores second firmware of the same type as that of the first firmware and third firmware of a type different from that of the first firmware. , and can be focused using antenna beams to achieve a simple form of location encryption. The static region mask identifies each pixel in the static region upon the static region mask being superimposed on the current frame.