Action analysis device, action analysis method, and action analysis program

An action analysis method comprising:

• analyzing input acoustic information, and generating acoustic analysis information indicating a feature of the acoustic information;
• determining a time difference between when an acoustic event identified by the acoustic analysis information occurs and when an event corresponding to the acoustic event occurs in input video obtained by capturing an image of a crowd;
• and
• analyzing an action of the crowd corresponding to the acoustic event, using the input video, the acoustic analysis information, and the time difference.

A non-transitory computer readable information recording medium storing an action analysis program, when executed by a processor, that performs a method for:

• analyzing input acoustic information, and generating acoustic analysis information indicating a feature of the acoustic information;
• determining a time difference between when an acoustic event identified by the acoustic analysis information occurs and when an event corresponding to the acoustic event occurs in input video obtained by capturing an image of a crowd;
• and
• analyzing an action of the crowd corresponding to the acoustic event, using the input video, the acoustic analysis information, and the time difference.