Recorded data processing method and recorded data processing device

A recorded data processing method comprising:

• sequentially selecting evaluation target recorded data from an unknown data group including a plurality of pieces of recorded data each representing a recording target including at least one of audio or an image;
• at each time of selection of the evaluation target recorded data, for each of N (N is a natural number of three or more) recorded data pairs each formed by two pieces of recorded data that are adjacent to each other when N pieces of recorded data are arranged cyclically, the N pieces of recorded data including a related data group including a plurality of pieces of recorded data each representing the recording target including the at least one of the audio or the image and having relation to each other and the evaluation target recorded data, calculating a time difference between time signals representing temporal changes of the recording target in the two respective pieces of recorded data of the recorded data pair;
• and
• evaluating presence or absence of relation of the evaluation target recorded data to the related data group according to a total value of N time differences calculated for the N recorded data pairs, individually, and moving the evaluation target recorded data from the unknown data group to the related data group when the relation is affirmed.

A recorded data processing device comprising:

• an electronic controller having a calculating unit and an evaluating unit,
• the calculating unit being configured to calculate, for each of N (N is a natural number of three or more) recorded data pairs each formed by two pieces of recorded data that are adjacent to each other when N pieces of recorded data each representing a recording target including at least one of audio or an image are arranged cyclically, a time difference between time signals representing temporal changes of the recording target in the two respective pieces of recorded data of the recorded data pair;
• and
• the evaluating unit being configured to evaluate whether or not the recorded data having no relevance to any N pieces of recorded data according to a total value of N time differences calculated for the N recorded data pairs.

A recorded data processing device comprising:

• an electronic controller having a selecting unit, a calculating unit, and an evaluating unit,
• the selecting unit being configured to sequentially select evaluation target recorded data from an unknown data group including a plurality of pieces of recorded data each representing a recording target including at least one of audio or an image;
• the calculating unit being configured to calculate, at each time of selection of the evaluation target recorded data, for each of N (N is a natural number of three or more) recorded data pairs each formed by two pieces of recorded data that are adjacent to each other when N pieces of recorded data are arranged cyclically, the N pieces of recorded data including a related data group including a plurality of pieces of recorded data each representing the recording target including the at least one of the audio or the image and having relation to each other and the evaluation target recorded data, a time difference between time signals representing temporal changes of the recording target in the two respective pieces of recorded data of the recorded data pair;
• and
• the evaluating unit being configured to evaluate, at each time of selection of the evaluation target recorded data, presence or absence of relation of the evaluation target recorded data to the related data group according to a total value of N time differences calculated for the N recorded data pairs, and add the evaluation target recorded data to the related data group when the relation is affirmed.