1. An on-line advertising system, comprising:
an advertisement database for maintaining advertisement data of a plurality of advertisements, a keyword related to each said advertisement and a category corresponding to each said advertisement;
a content database for maintaining a content identifier for identifying content provided to a user terminal through a communication network, and a category related to the content;
an advertisement data searching unit for searching the advertisement database for advertisement data corresponding to a category related to the content to be searched;
an advertisement data selecting unit for selecting a portion of advertisement data among the searched advertisement data, based on a predetermined criterion, by using a keyword related to the searched advertisement data; and
a display control unit for controlling the selected advertisement data to be displayed on the user terminal in association with the searched content.
2. The system as claimed in claim 1, wherein the advertisement data selecting unit comprises:
a keyword searching module for searching the content for a keyword related to the searched advertisement data;
an exposure point computing module for inspecting at least one selected from a group consisting of the number of the searched keywords, locations thereof in the content and a font style thereof, and computing an exposure point related to the advertisement data based on the result of the inspection; and
an advertisement data selecting module for selecting a portion of advertisement data among the searched advertisement data, based on the exposure point.
3. The system as claimed in claim 1, the system further comprising a keyword database for maintaining a keyword and a similar keyword related thereto, wherein the similar keyword is a keyword having a similar meaning to the meaning of the keyword;
wherein the advertisement data selecting unit comprises:
a keyword searching module for searching the content for a keyword related to the searched advertisement data and a similar keyword to the keyword;
an exposure point computing module for inspecting at least one selected from a group consisting of the number of the searched similar keywords, locations thereof in the content and a font style thereof, and computing an exposure point related to the advertisement data based on the result of the inspection; and
an advertisement data selecting module for selecting a portion of advertisement data from the searched advertisement data, based on the exposure point.
4. The system as claimed in claim 1, the system further comprising a keyword database for maintaining a keyword and an expansion keyword related thereto, wherein the expansion keyword is a keyword having a meaning of a upper concept of the meaning of the keyword or a lower concept thereof;
wherein the advertisement data selecting unit comprises:
a keyword searching module for searching the content for a keyword related to the searched advertisement data and an expansion keyword related to the keyword;
an exposure point computing module for inspecting at least one selected from a group consisting of the number of the searched expansion keywords, locations thereof in the content and a font style thereof, and computing an exposure point related to the advertisement data based on the result of the inspection; and
an advertisement data selecting module for selecting a portion of advertisement data from the searched advertisement data, based on the exposure point.
5. The system as claimed in claim 1, the system further comprising a keyword database for maintaining a keyword, a similar keyword related thereto and an expansion keyword related thereto, wherein the similar keyword is a keyword having a similar meaning to the meaning of the keyword and the expansion keyword is a keyword having a meaning of a upper concept of the meaning of the keyword or a lower concept thereof;
wherein the advertisement data selecting unit comprises:
a keyword searching module for searching the content for a keyword related to the searched advertisement data, a similar keyword related to the keyword and an expansion keyword related thereto;
an exposure point computing module for inspecting at least one selected from a group consisting of the number of the searched keywords, locations thereof in the content and a font style thereof, and computing a first exposure point related to the advertisement data based on the result of the inspection;
inspecting at least one selected from a group consisting of the number of the searched similar keywords, locations thereof in the content and a font style thereof, and computing a second exposure point related to the advertisement data based on the result of the inspection;
inspecting at least one selected from a group consisting of the number of the searched expansion keywords, locations thereof in the content and a font style thereof, computing a third exposure point related to the advertisement data based on the result of the inspection; and
computing an exposure point based on at least one of the first exposure point, the second exposure point and the third exposure point; and
an advertisement data selecting module for selecting a portion of advertisement data from the searched advertisement data, based on the exposure point.
6. The system as claimed in claim 5, wherein the exposure point computing module computes the exposure point by giving a weight to the first exposure point, the second exposure point or the third exposure point.
7. The system as claimed in claim 2, wherein the advertisement data selecting module selects the predetermined number of advertisement data of which the exposure point ranks high.
8. The system as claimed in claim 2, wherein the advertisement data selecting module selects predetermined advertisement data from the searched advertisement data on the basis of the exposure point and selects a predetermined number of random advertisement data, during a predetermined period, from the selected advertisement data.
9. The system as claimed in claim 8, wherein the advertisement data selecting module sequentially selects a predetermined number of the selected advertisement data during the predetermined period.
10. The system as claimed in claim 1, wherein the advertisement data selecting unit selects a predetermined number of random advertisement data from the searched advertisement data.
11. The system as claimed in claim 1, wherein the advertisement data selecting unit sequentially selects the predetermined number of advertisement data during a predetermined period from the searched advertisement data.
12. An on-line advertising method, the method comprising the steps of:
maintaining advertisement data, a keyword related thereto and a category corresponding thereto, in an advertisement database;
maintaining a content identifier for identifying content provided to a user terminal through a communication network and a category related to the content, in a content database;
searching the advertisement database for advertisement data corresponding to a category related to the content;
selecting advertisement data from the searched advertisement data, based on a predetermined criterion, by using a keyword related to the searched advertisement data; and
controlling the adopted advertisement data to be displayed on the user terminal in association with the content.
13. The method as claimed in claim 12, wherein the step of maintaining the advertisement database comprises the steps of:
receiving a keyword and advertisement data from an advertiser;
receiving selection of a category from the advertiser; and
storing the received keyword in the advertisement database, in association with the advertisement data and storing the selected category in the advertisement database, in correspondence with the advertisement data.
14. The method as claimed in claim 13, wherein the step of receiving selection of a category from the advertiser comprises the steps of:
maintaining categories in a predetermined database;
providing the categories for the advertiser by a directory searching method; and
receiving selection of a predetermined category among the provided categories, from the advertiser.
15. The method as claimed in claim 12, the method further comprising the step of maintaining keywords in a keyword database;
wherein the step of selecting advertisement data according to a predetermined criterion from the searched advertisement data by using the keyword comprises the steps of:
respectively searching the content for a keyword related to the advertisement data;
inspecting at least one selected from a group consisting of the number of the searched keywords, locations thereof in the content and a font style thereof, and computing an exposure point related to the searched advertisement data based on the result of the inspection; and
selecting advertisement data from the searched advertisement data based on the exposure point.
16. The method as claimed in claim 12, the method further comprising the step of maintaining a keyword, a similar keyword related thereto or an expansion keyword related thereto in a keyword database, wherein the similar keyword is a keyword having a similar meaning to the meaning of the keyword and the expansion keyword is a keyword having a meaning of a upper concept of the meaning of the keyword or a lower concept thereof;
wherein the step of selecting advertisement data according to a predetermined criterion from the searched advertisement data using the keyword comprises the steps of:
respectively searching the content for a keyword related to the advertisement data;
searching for a similar keyword related to the searched keyword or an expansion keyword related thereto;
inspecting at least one selected from a group consisting of the number of the searched similar keywords, locations thereof in the content and a font style thereof, and computing a first exposure point related to the advertisement data based on the result of the inspection;
inspecting at least one selected from a group consisting of the number of the searched expansion keywords, locations thereof in the content and a font style thereof, and computing a second exposure point related to the advertisement data based on the result of the inspection; and
computing an exposure point from the searched advertisement data, based on the first exposure point or the second exposure point.
17. A computer readable record medium recording a program for implementing an on-line advertising method, the method comprising the steps of:
maintaining advertisement data, a keyword related thereto and a category corresponding thereto, in an advertisement database;
maintaining a content identifier for identifying content provided to a user terminal through a communication network and a category related to the content, in a content database;
searching the advertisement database for advertisement data corresponding to a category related to the content;
selecting advertisement data from the searched advertisement data, based on a predetermined criterion, by using a keyword related to the searched advertisement data; and
controlling the adopted advertisement data to be displayed on the user terminal in association with the content.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A recording power calibration method, for improving seeking stability on a power calibration area, the method being for performing an optimal recording power calibration once when an optical disk is placed into an optical drive, and thus obtaining optimal recording power, wherein a specific area serving as a data recording area during the optimal recording power calibration, and a length of the specific area being such that a plurality of times of optimal recording power calibrations can be performed, the method comprising:
an optimal recording power calibration step, for recording, with a plurality of recording powers, a first length of calibration data in the specific area, and calibrating the optimal recording power, wherein a data sector recorded in this step is defined as a calibration recording sector,
wherein an optimal recording power calibration has been performed at the optical disk before the optimal recording power calibration step,
wherein a blanking area is reserved between the calibration recording sector corresponding to the optimal recording power calibration step and the calibration recording sector corresponding to the optimal recording power calibration step previous.
2. The method according to claim 1, wherein the specific area is a power calibration area of the optical disk.
3. The method according to claim 1, wherein the specific area is a reserved area of the optical disk.
4. The method according to claim 1, wherein the first length is greater than the data sector.
5. The method according to claim 1, further comprising:
a data recording step, for recording an information recording sector with data recording power for a second length of information having a logical address beside the calibration recording sector of the specific area, such that the seeking stability in the specific area is enhanced according to logical address of the information recording sector when a next power calibration is performed,
wherein the blanking area is reserved between the calibration recording sector corresponding to the optimal recording power calibration step and the information recording sector in the optimal recording power calibration step previous.