Using a degree-of-unexpectedness to provide unexpected recommendations
First Claim
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1. An information presentation apparatus which presents an item to a user, comprising:
- at least one hardware electronic device configured to effect;
a user action history database which accumulates a history of an item used by the user;
an item database which accumulates a plurality of sets of an item and a keyword describing each item;
a degree-of-preference calculation unit which uses the user action history database and the item database, to thereby calculate a degree to which the user is interested in each item, as a degree of preference;
a degree-of-unexpectedness calculation unit which uses a reciprocal of a degree of co-occurrence between keywords accumulated in the item database, to thereby calculate a degree of unexpectedness of each item;
an integrated processing unit which processes in an integrated manner the degree of preference and the degree of unexpectedness, to thereby calculate a recommendation score of each item accumulated in the item database;
a presentation information decision unit which uses the recommendation score calculated by the integrated processing unit, to thereby decide information of an item to be presented; and
an information communication unit which performs information communication with a terminal, whereinthe information of the item decided by the presentation information decision unit is transmitted from the information communication unit to the terminal.
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Abstract
In the situation where an amount of information on a user action history is small, information which is unexpected and interesting to a user cannot be presented with high accuracy. In order to solve this problem, a general degree of unexpectedness of an item, which does not depend on the user action history, and a degree of preference of the user to the item, which is based on the user action history, are calculated in an integrated manner, whereby the information which is unexpected and interesting to the user is recommended.
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Citations
18 Claims
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1. An information presentation apparatus which presents an item to a user, comprising:
at least one hardware electronic device configured to effect; a user action history database which accumulates a history of an item used by the user; an item database which accumulates a plurality of sets of an item and a keyword describing each item; a degree-of-preference calculation unit which uses the user action history database and the item database, to thereby calculate a degree to which the user is interested in each item, as a degree of preference; a degree-of-unexpectedness calculation unit which uses a reciprocal of a degree of co-occurrence between keywords accumulated in the item database, to thereby calculate a degree of unexpectedness of each item; an integrated processing unit which processes in an integrated manner the degree of preference and the degree of unexpectedness, to thereby calculate a recommendation score of each item accumulated in the item database; a presentation information decision unit which uses the recommendation score calculated by the integrated processing unit, to thereby decide information of an item to be presented; and an information communication unit which performs information communication with a terminal, wherein the information of the item decided by the presentation information decision unit is transmitted from the information communication unit to the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification
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Current AssigneeHitachi Solutions Limited (Hitachi, Ltd.)
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Original AssigneeHitachi Solutions Limited (Hitachi, Ltd.)
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InventorsAkiyama, Takayuki, Tanizaki, Masaaki, Obara, Kiyohiro
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Primary Examiner(s)RIFKIN, BEN M
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Application NumberUS13/085,554Publication NumberTime in Patent Office1,098 DaysField of Search706/50US Class Current706/50CPC Class CodesH04N 21/25891 being end-user preferences ...H04N 21/4667 Processing of monitored end...H04N 21/6582 Data stored in the client, ...
