INDEXING SYSTEM AND ITS RECORDING SYSTEM

PROBLEM TO BE SOLVED: To cope with a new recording circumstance or a recording object without preparing any threshold for detection or any pattern of detection corresponding to all recording objects or recording environments, or requiring much more costs. SOLUTION: A detection pattern preparing part 13 prepares a pattern for detection based on the inputted past data pattern, and extracts a feature part by using the pattern. As data for detecting the feature part, there are a method using recording data themselves and a method using reference data. At the time of detecting the feature part, a feature part detecting part 14 prepares a pattern for detection from the past data pattern, and recognizes the data pattern matched with the pattern for detection as a normal data pattern, and recognizes the data pattern mismatched with the pattern for detection as the data pattern of the feature part. Then, the part where the data pattern of the feature part is detected is indexed by a marking part 15. COPYRIGHT: (C)2005,JPO&NCIPI