MOBILE OBJECT MANAGEMENT SYSTEM, MOBILE TERMINAL AND PROCESSOR

摘要

A watermark embedding means (13) embeds a specified digital watermark in positional information measured by a positioning means (12) for measuring the current position of a mobile object. The positional information embedded with the digital watermark is delivered as track information from a track information output means (14) to a carrying medium (20). A track information take-in means (31) takes in the track information from the carrying medium (20) and a watermark detecting means (32) detects the digital watermark embedded in the positional information. A track display means (33) displays track information from which the digital watermark is detected and track information from which a digital watermark is not detected in different modes.