INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM

• US 20140012495A1
• Filed: 03/16/2012
• Published: 01/09/2014
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ide, Naoki, Kobayashi, Yoshiyuki, Ito, Masato, Sabe, Kohtaro
• Granted Patent: US 9,285,235 B2
• Time in Patent Office: Days
• US Class Current: 701/424
• CPC Class Codes: G01C 21/3484 Personalized, e.g. from learned user behaviour or user-defined profiles
• CPC Class Codes: G01C 21/3617 using user history, behaviour, conditions or preferences, e.g. predicted or inferred from previous use or current movement

Abstract

The present technique relates to an information processing device, an information processing method and a program which can accumulate sufficient movement history data with a little power consumption. A similarity search unit searches for a past route similar to the immediate movement history which is acquired by a position sensor unit and which has time series position data, from the search data stored in a past history DB. A fitness determination unit determines whether or not goodness of fit of the past route searched by the similarity search unit and the immediate movement history is a predetermined threshold or more. A sensor control unit controls an acquisition interval of the position data of the position sensor unit according to a determination result of the fitness determination unit. The technique of this disclosure is applicable to a prediction device which, for example, acquires position data and predicts a predicted route.

Claims

1. An information processing device comprising:

a position sensor unit which acquires an immediate movement history which comprises time series position data;

a past history DB which stores search data;

a similarity search unit which searches for a past route similar to the immediate movement history from the search data;

a fitness determination unit which determines whether or not goodness of fit of the past route searched by the similarity search unit and the immediate movement history is a predetermined threshold or more; and

a sensor control unit which controls an acquisition interval of the position data of the position sensor unit according to a determination result of the fitness determination unit.

2. The information processing device according to claim 1, wherein, when the goodness of fit is the predetermined threshold or more, the sensor control unit performs control such that the acquisition interval of the position data becomes longer than when the goodness of fit is less than the predetermined threshold.

3. The information processing device according to claim 1, further comprising a departure time prediction unit which predicts a departure time which is a time to depart from a current place,

wherein, when the goodness of fit is the predetermined threshold or more and a predicted departure time predicted by the departure time prediction unit comes after a predetermined time, the sensor control unit performs control such that the acquisition interval of the position data becomes longer than when the goodness of fit is less than the predetermined threshold.

4. The information processing device according to claim 3, wherein the departure time prediction unit predicts the departure time as one of an absolute time and a relative time.

5. The information processing device according to claim 1, wherein

the past history DB stores a past movement history as the search data, and

the similarity search unit searches for a history similar to the immediate movement history using a distance between the past movement history and the immediate movement history as the goodness of fit.

6. The information processing device according to claim 1, wherein

the past history DB stores as the search data a parameter obtained when a past movement history is learned according to a stochastic transition model, and

the similarity search unit searches for a history similar to the immediate movement history using a likelihood of the stochastic transition model calculated for the immediate movement history as the goodness of fit.

7. An information processing method comprising the steps of, at an information processing device which comprises a past history DB which stores search data:

acquiring an immediate movement history which comprises time series position data;

searching for a past route similar to the immediate movement history from the search data;

determining whether or not goodness of fit of the searched past route and the immediate movement history is a predetermined threshold or more; and

controlling an acquisition interval of the position data of the position sensor unit according to a determination result.

8. A program causing a computer to function as:

a similarity search unit which searches for a past route similar to the immediate movement history which is acquired by a position sensor unit and which comprises time series position data, from the search data stored in a past history DB;

a fitness determination unit which determines whether or not goodness of fit of the past route searched by the similarity search unit and the immediate movement history is a predetermined threshold or more; and

a sensor control unit which controls an acquisition interval of the position data of the position sensor unit according to a determination result of the fitness determination unit.