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 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 the 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 pieces of recorded data of each recorded data pair, wherein N is a natural number of three or more;
• 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 configured to:
• calculate a time difference between time signals representing temporal changes of a recording target in two pieces of recorded data of each recorded data pair of N recorded data pairs, wherein
• N is greater than or equal to 3,
• each recorded data pair of the N recorded data pairs is formed by the two pieces of the recorded data that are adjacent to each other,
• the two pieces of the recorded data belongs to N pieces of the recorded data arranged cyclically, and
• the N pieces of the recorded data each represents the recording target including at least one of audio or an image;
• and
• evaluate whether or not the recorded data includes one piece of recorded data having no relevance in terms of one of content or time to other pieces of the recorded data among the N pieces of the recorded data, according to a total value of N time differences calculated for the N recorded data pairs, wherein
• the time difference is calculated for each recorded data pair of the N pieces of the recorded data including N−1 pieces of the recorded data having relation to each other and the one piece of the recorded data having unknown relation to the N−1 pieces of the recorded data, and
• when the recorded data is evaluated as including the one piece of the recorded data having no relevance among the N pieces of the recorded data, the one piece of the recorded data is determined to be recorded data having no relation to the N−1 pieces of the recorded data.

A recorded data processing device, comprising:

• an electronic controller 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;
• calculate, at each time of selection of the evaluation target recorded data, for each of N 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 the 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 pieces of recorded data of each recorded data pair, wherein N is a natural number of three or more;
• evaluate, at each time of the 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.