Dictionary creation device and dictionary creation method

• US 20060271527A1
• Filed: 08/02/2006
• Published: 11/30/2006
• Est. Priority Date: 12/26/2003
• Status: Active Grant

• Current Assignee: Eiichi Naito, Hideyuki Yoshida, Hiroshi Kutsumi, Jun Ozawa
• Original Assignee: Eiichi Naito, Hideyuki Yoshida, Hiroshi Kutsumi, Jun Ozawa
• Inventors: Naito, Eiichi, Ozawa, Jun, Kutsumi, Hiroshi, Yoshida, Hideyuki
• Granted Patent: US 7,921,113 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 40/242 Dictionaries
• CPC Class Codes: H04N 21/482 End-user interface for program selection broadcast systems using EPGs H04H60/72

Abstract

There is provided a dictionary creation device and dictionary creation method which optimally creates and updates a dictionary for classifying, searching, or extracting text information in accordance with a changes in content of text information groups. The dictionary creation device includes: a keyword extraction unit that extracts a keyword from inputted text information; a keyword statistics unit that finds statistics regarding an appearance of the keyword; a keyword assessment value calculation unit that calculates an assessment value of the extracted keyword based on the statistics regarding the appearance of the keyword; a determination unit that determines whether or not to register or delete the keyword based on the calculated assessment value; a dictionary registration and deletion unit which registers or deletes the keyword in or from a dictionary database based on a result of the determination performed by the determination unit; and the dictionary database.

Claims

1. A dictionary creation device that creates a dictionary used for searching, classifying, or filtering information written as text,

wherein keywords are registered in the dictionary per category, and

wherein said dictionary creation device comprises:

a classification information acquisition unit operable to acquire classification information regarding the category and text information from at least two information sources which differ from an information source of the information written as text;

a keyword extraction unit operable to extract a keyword from the text information;

a dictionary registration and deletion unit operable to register or delete the extracted keyword in dictionaries corresponding to the respective information sources, in accordance with the category, based upon the classification information acquired by said classification information acquisition unit and the keyword extracted by said keyword extraction unit; and

a dictionary combining and editing unit operable to edit and combine the respective created dictionaries that correspond to each information source.

2. The dictionary creation device according to claim 1,

wherein said dictionary combining and editing unit is operable to determine a corresponding relationship between each category of the dictionaries that correspond to each information source based on a keyword that corresponds to each category in the classification information of the dictionaries that correspond to each information source.

3. The dictionary creation device according to claim 2,

wherein said dictionary combining and editing unit is operable to determine a corresponding relationship between each category using the number of common elements found in the keywords registered per category of each information source.

4. The dictionary creation device according to claim 1,

wherein said classification information acquisition unit is operable to acquire the classification information regarding the category and the text information via the Internet, which is used as one of the information sources.

5. The dictionary creation device according to claim 4,

wherein the information written as text is information related to a TV program.

6. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

the dictionary creation device according to claim 1;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device; and

a search unit operable to search the EPG data using the dictionary and output a search result.

7. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

a dictionary creation device according to claim 1;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device;

a document vector creation unit operable to create a document vector that is a pair of a keyword and an weight from the EPG data using the dictionary;

a search condition acquisition unit operable to acquire a search condition;

a document evaluation value calculation unit operable to calculate an evaluation value for the EPG data based on the search condition and the document vector; and

a search result output unit operable to output EPG data selected in accordance with the calculated evaluation value or an assessment value.

10. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

the dictionary creation device according to claim 2;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device; and

a search unit operable to search the EPG data using the dictionary and output a search result.

11. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

the dictionary creation device according to claim 3;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device; and

a search unit operable to search the EPG data using the dictionary and output a search result.

12. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

the dictionary creation device according to claim 4;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device; and

a search unit operable to search the EPG data using the dictionary and output a search result.

13. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

the dictionary creation device according to claim 5;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device; and

a search unit operable to search the EPG data using the dictionary and output a search result.

14. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

a dictionary creation device according to claim 2;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device;

a document vector creation unit operable to create a document vector that is a pair of a keyword and an weight from the EPG data using the dictionary;

a search condition acquisition unit operable to acquire a search condition;

a document evaluation value calculation unit operable to calculate an evaluation value for the EPG data based on the search condition and the document vector; and

a search result output unit operable to output EPG data selected in accordance with the calculated evaluation value or an assessment value.

15. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

a dictionary creation device according to claim 3;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device;

a document vector creation unit operable to create a document vector that is a pair of a keyword and an weight from the EPG data using the dictionary;

a search condition acquisition unit operable to acquire a search condition;

a document evaluation value calculation unit operable to calculate an evaluation value for the EPG data based on the search condition and the document vector; and

a search result output unit operable to output EPG data selected in accordance with the calculated evaluation value or an assessment value.

16. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

a dictionary creation device according to claim 4;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device;

a document vector creation unit operable to create a document vector that is a pair of a keyword and an weight from the EPG data using the dictionary;

a search condition acquisition unit operable to acquire a search condition;

a document evaluation value calculation unit operable to calculate an evaluation value for the EPG data based on the search condition and the document vector; and

a search result output unit operable to output EPG data selected in accordance with the calculated evaluation value or an assessment value.

17. An Electric Program Guide (EPG) TV show search system which searches EPG data, said system comprising:

a dictionary creation device according to claim 5;

a dictionary storage unit operable to store a dictionary created by said dictionary creation device;

a document vector creation unit operable to create a document vector that is a pair of a keyword and an weight from the EPG data using the dictionary;

a search condition acquisition unit operable to acquire a search condition;

a document evaluation value calculation unit operable to calculate an evaluation value for the EPG data based on the search condition and the document vector; and

a search result output unit operable to output EPG data selected in accordance with the calculated evaluation value or an assessment value.

8. A dictionary creation method for creating a dictionary used for searching, classifying, or filtering information written as text,

wherein keywords are registered in the dictionary per category, and

wherein said dictionary creation method comprises:

acquiring classification information regarding the category and text information from at least two information sources which differ from an information source of the information written as text;

extracting a keyword from the text information;

registering or deleting the extracted keyword in dictionaries corresponding to the respective information sources, in accordance with the category, based upon the classification information acquired in said acquiring and the keyword extracted in said extracting; and

combining and editing the respective created dictionaries that correspond to each information source.

9. A program for creating a dictionary used for searching, classifying, or filtering information written as text,

wherein keywords are registered in the dictionary per category, and

wherein said program causes a computer to execute the steps of:

acquiring classification information regarding the category and text information from at least two information sources which differ from an information source of the information written as text;

extracting a keyword from the text information;

registering or deleting the extracted keyword in dictionaries corresponding to the respective information sources, in accordance with the category, based upon the classification information acquired in said acquiring and the keyword extracted in said extracting; and

combining and editing the respective created dictionaries that correspond to each information source.