Information processing device, information processing method, and computer readable storage medium

An information processing method comprising:

• obtaining a plurality of external times that are measured at different time points in another device and reported from the other device in order;
• measuring a plurality of internal times of the information processing device in response to obtaining each of the plurality of external times;
• and
• correcting a first external time that is obtained in a first time period of a plurality of sequential time periods based on a rate of a change in the plurality of internal times from a second external time to a third external time, the second external time being an external time at which a time difference between a corrected time of an external time obtained in a second time period and an internal time measured in response to obtaining the external time in the second time period is minimum in the second time period, the third external time being an external time at which a time difference between a corrected time of an external time obtained in a third time period and an internal time measured in response to obtaining the external time in the third time period is minimum in the third time period, each of the second time period and the third time period being one of the plurality of the sequential time periods, the second time period being prior to the third time period.

A non-transitory computer-readable medium including computer program instructions, which when executed by an information processing apparatus, cause the information processing device to:

• obtain a plurality of external times that are measured at different time points in another device and reported from the other device in order;
• measure a plurality of internal times of the information processing device in response to obtaining each of the plurality of external times;
• and
• correct a first external time that is obtained in a first time period of a plurality of sequential time periods based on a rate of a change in the plurality of internal times from a second external time to a third external time, the second external time being an external time at which a time difference between a corrected time of an external time obtained in a second time period and an internal time measured in response to obtaining the external time in the second time period is minimum in the second time period, the third external time being an external time at which a time difference between a corrected time of an external time obtained in a third time period and an internal time measured in response to obtaining the external time in the third time period is minimum in the third time period, each of the second time period and the third time period being one of the plurality of the sequential time periods, the second time period being prior to the third time period.