Abstract: The present invention includes: an identification code generation unit that generates, from information of a company code including a first code that uniquely identifies a management target in a part of a company in the part of the company and a second code that identifies the part of the company, an identification code including a history of the management target; a hash processing unit that hashes the identification code generated by the identification code generation unit according to a hash function and converts the hashed identification code into a meaningless code; and a reference code generation unit that generates a reference code unified for the entire company based on the meaningless code converted by the hash processing unit.

Abstract: A three-dimensional data display device includes an identification unit which is configured to identify a point of interest which is a point on three-dimensional data, a viewpoint control unit which is configured to move a viewpoint along an annular movement route surrounding the point of interest with a sight line directed toward the point of interest, and a rendering unit which is configured to obtain two-dimensional data by rendering the three-dimensional data on the basis of a viewpoint.

Abstract: A reproduction unit synchronously reproduces different videos recorded in the same time zone on each of a main pane and a sub pane of which a size is smaller than a size of the main pane of a reproduction screen having the main pane and the sub pane. A reproduction switching unit switches the video reproduced on the main pane to the video reproduced on the sub pane during a reproduction of the video by the reproduction unit.

Abstract: A three-dimensional data display device includes an identification unit which is configured to identify a point of interest which is a point on three-dimensional data, a viewpoint control unit which is configured to move a viewpoint along an annular movement route surrounding the point of interest with a sight line directed toward the point of interest, and a rendering unit which is configured to obtain two-dimensional data by rendering the three-dimensional data on the basis of a viewpoint.

Abstract: A reproduction unit synchronously reproduces different videos recorded in the same time zone on each of a main pane and a sub pane of which a size is smaller than a size of the main pane of a reproduction screen having the main pane and the sub pane. A reproduction switching unit switches the video reproduced on the main pane to the video reproduced on the sub pane during a reproduction of the video by the reproduction unit.

Abstract: An IP network system and an H.323 gatekeeper for easily performing voice communication between an existing system such as an IP-PBX system not employing the H.323 protocol and a system employing the H.323 protocol. There are connected an H.323 gatekeeper, H.323 terminal, an IP-PBX and an IP component to an IP network. The H.323 gatekeeper installs therein a software to perform protocol conversion between the PHS protocol and the H.323 protocol. Accordingly, voice communication between the H.323 terminal and the IP component can be realized.