KR101573331B1 - Method for searching keyword of broadcasting receiver and broadcasting receiver - Google Patents

Abstract

A keyword extracting unit for extracting a keyword from the caption data; a keyword display instruction unit for displaying the extracted keyword together with the video by the broadcast signal; a search instruction for the displayed keyword And a search result display unit for displaying a search result by the search engine.

Description

TECHNICAL FIELD [0001] The present invention relates to a broadcast receiving apparatus and a keyword searching method,

The present invention relates to a broadcast receiving apparatus and a keyword search method.

BACKGROUND ART [0002] Techniques for providing free text search of electronic program guide (EPG) data in a digital television system are known, for example, as described in Patent Document 1, for example.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-289848

However, as a viewer of a digital television or the like, there are times when it is desired to collect more information about information obtained from a program while viewing the program. The related art can not retrieve related texts while watching the program because it is only assuming text retrieval of electronic program guide data. Therefore, there is a problem that information can not be collected even when a viewer intends to acquire more information while watching a program.

It is an object of the present invention to provide a new and improved broadcast receiving apparatus and a keyword search method capable of acquiring information related to a program from a search engine even while watching a program.

According to an aspect of the present invention, there is provided a method for searching a title for a keyword, comprising the steps of: extracting keywords from caption data included in a broadcast signal; displaying the extracted keyword together with a video image by a broadcast signal; Executing a keyword search by a search engine through a communication network when an instruction is received; and displaying a search result by the search engine.

According to the above arrangement, the keyword is extracted from the caption data included in the broadcast signal, and the extracted keyword is displayed together with the video image. When a search instruction is received for the displayed keyword, the keyword search by the search engine is executed through the communication network and the search result is displayed. Thus, it becomes possible to acquire more information from the search engine regarding the broadcasted information.

According to another aspect of the present invention, there is provided a display apparatus including: a signal processing unit for capturing caption data from a broadcast signal; a keyword extracting unit for extracting keywords from the caption data; A search instruction unit for executing a keyword search by a search engine via a communication network when a search instruction is received for the displayed keyword; and a search result display unit for displaying a search result by the search engine A broadcast receiving apparatus is provided.

According to the above arrangement, the caption data is acquired from the broadcast signal, the keyword is extracted from the caption data, and the extracted keyword is displayed together with the video image. When a search instruction is received for the displayed keyword, the keyword search by the search engine is executed through the communication network and the search result is displayed. Thus, it becomes possible to acquire more information from the search engine regarding the broadcasted information.

And an appearance frequency calculating unit for calculating an appearance frequency of the keyword extracted by the keyword extracting unit, and the keyword display instruction unit displays a plurality of keywords in the order of occurrence frequency. With the above arrangement, the user can further search for a keyword having a high appearance frequency.

The keyword extracting unit extracts the keyword only when the program specified by the user is being received. With this configuration, it is not necessary to extract keywords for all the programs, and the throughput can be reduced.

According to another aspect of the present invention for solving the above problems,

A signal processing unit for obtaining caption data from a broadcast signal;

A central processing unit for extracting a keyword from the caption data caption data acquired by the signal processing unit and executing a keyword search by a search engine through a communication network when a search instruction is received for the extracted keyword, ;

And a display control unit for displaying the keyword and keyword search results extracted from the central processing unit on a display panel.

According to the above configuration, the user can efficiently search information related to a program that he / she wished to watch while watching a program by using a search engine in real time.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, elements having substantially the same functional configuration in the present specification and drawings are denoted by the same reference numerals, and redundant description will be omitted.

1 is a schematic diagram showing a configuration of a digital broadcast receiver 100 according to an embodiment of the present invention. The digital broadcast receiver 100 according to the present embodiment is, for example, a device for receiving and watching a terrestrial digital broadcast signal. Also, the digital broadcast receiver 100 may be connected to the Internet 150 and may acquire various information through the Internet 150.

1, the digital broadcast receiver 100 includes an Ethernet (registered trademark) controller 102, an NVRAM 104, an SDRAM 106, a CPU 108, an Internet browser The EPG storage unit 120, the display control unit 122, the display panel 124, the D / A converter 110, the antenna 112, the tuner 114, A converter 126, a speaker 128, and an IrDA 130. FIG.

The digital broadcast receiver 100 may be connected to the Internet 150 via the Ethernet controller 102. [ Various kinds of information acquired from the Internet 150 can be displayed on the display panel 124 by browsing a web page in the Internet browser 110. [ The Internet browser 110 is an application software for browsing a web page, and makes the CPU 108 function as a browser. The application software (program) of the Internet browser 110 is stored in a memory of the television broadcast receiver 100. The NVRAM 104 and the SDRAM 106 are memories for retaining information acquired via the Internet 150 and for maintaining software programs. In particular, the memory may store a user-specified program used by the CPU 108 for keyword extraction.

The tuner 114 included in the digital broadcasting receiver 100 receives the terrestrial digital broadcasting signal, and the terrestrial digital broadcasting signal is received by the tuner 114 via the antenna 112. The received broadcast signal is sent to the signal processing unit 116. The signal processing unit 116 separates the signals multiplexed by the DEMUX processing and outputs the transport stream input from the tuner 114 to an elementary stream ES such as video data, audio data, And sends it to the decoder 118. The decoded video data and caption data are displayed on the display panel 124 under the control of the display control unit 122. [ The decoded audio data is converted into an analog signal by a digital / analog (D / A) converter 126 and sent to the speaker 128. In addition, the signal processor 116 performs SI / PSI (Service Information / Program Specific Information) processing and divides data of an electronic program guide (EPG) from a broadcast signal and sends it to the EPG storage unit 120. The data of the EPG is displayed on the display panel 124 under the control of the display control section 122. [

In the digital broadcast receiver 100 of the present embodiment having the above-described configuration, the CPU 108 functions in accordance with the program stored in the memory, thereby extracting keywords (for example, nouns) from the caption data, Keywords can be extracted.

The CPU 108 ranks the plurality of extracted keywords based on the appearance frequency, and sends information about the keywords and the appearance frequency to the display control unit 122 and displays them on the display panel 124.

2 is a block diagram showing a functional configuration of the CPU 108 operating in accordance with a program.

2, the keyword extraction unit 200, the appearance frequency calculation unit 202, the keyword display instruction unit 204, the search instruction reception unit 206, A search instruction unit 208, a search result display instruction unit 210, and a setting condition acquisition unit 212. [

Here, the keyword extracting unit 200 extracts a keyword that can be a search keyword from the decoded caption data. The appearance frequency calculating unit 202 counts the number of occurrences within a predetermined time for each of the plurality of keywords extracted by the keyword extracting unit 200, and calculates an appearance frequency. The keyword display instruction unit 204 instructs the display control unit 122 to display the highest frequency of occurrence among the extracted keywords on the display panel 122 in order of appearance frequency.

Fig. 3 shows a state in which keywords ranked based on the frequency of occurrence are displayed on the display panel 124. Fig. Fig. 3 shows a case of viewing a sports program as an example. In this case, the caption data contains a relatively large number of names of athletes. Fig. 3 shows a state in which names of prominent baseball players are extracted from the caption data, and "Nagaseima Shigeo", "Wang Jeongjeong", "Hideki Matsui" and "Kawata Masumi" On the display screen 124a of the display unit 124a.

Here, the display of the keyword shown in Fig. 3 is displayed together with the image of the program in the display screen 124a. Therefore, the user can recognize the keyword having high appearance frequency in the caption data in real time while watching the sports program.

When the user wants to acquire more information about the displayed keyword, the user can select one keyword among a plurality of keywords using the remote controller 300, and send the selected keyword to the search engine via the Internet 150. [ When one keyword is selected by the remote controller 300, the information is sent from the IrDA (Infrared Data Association) 130 to the CPU 108. The search instruction receiving unit 206 shown in FIG. The search instruction unit 208 instructs the selected keyword to be sent to the server of the search engine through the Ethernet controller 102 and the Internet 150. As a result of the search, Is displayed on the display panel 124 in response to an instruction from the search result display instruction unit 210.

In this manner, the CPU 108 transmits the selected keyword to the search engine via the Internet 150, thereby performing keyword search in the search engine to which the keyword is input. Information such as a list of hit homepages is sent to the digital broadcast receiver 100 and displayed on the display panel 124. This information can be browsed on the display screen 124a of the display panel 124 by the function of the Internet browser 110. [ This allows the user to obtain more detailed information related to the program while viewing the program.

Therefore, according to the digital broadcast receiver 100 of the present embodiment, it is possible to combine a broadcast receiving function such as a terrestrial digital wave and a search function through the Internet 150, so that more detailed information on the program can be acquired in real time .

Furthermore, there is no need to extract keywords for programs of all genres, and whether to extract keywords can be determined appropriately according to the user's setting. For example, keywords may be extracted only from a program of a genre designated in advance by the user. For example, in the case of FIG. 3, in the case where the keyword is extracted only in the sports program and is set in advance by the user, the keyword may not be extracted while the viewer is viewing a program of another genre such as a drama. In this case, the genre of the program acquired in the EPG is compared with the genre in which the user sets the keyword extraction setting in advance, and if the two match, the keyword is extracted. If the genre is not matched, the keyword is not extracted. The setting condition acquisition unit 212 shown in Fig. 2 acquires the setting by the user and transmits the user setting to the search instruction unit 208, thereby instructing the search instruction unit 208 to search for a keyword by user setting as needed.

Also, even if the keyword search setting is not set for the program currently being watched, if the user has been set to display the keyword extraction result of the past, the keyword extraction result that was extracted in the past is displayed on the display panel 124 . For example, in the case where the genre of the program currently being watched is a drama, and even if the genre is set not to extract the keyword, if the past keyword extraction result is set to be displayed, The result of keyword extraction can be displayed as shown in FIG.

The extraction of the keyword can always be performed when there is an elementary stream of the caption data in the broadcast signal, and the syntax of the caption data can be analyzed regardless of the display on / off of the caption data on the display panel 124 Extraction of keywords is possible.

Next, the processing procedure in the digital broadcast receiver 100 of the present embodiment will be described with reference to Fig. First, in step S10, a program for extracting a keyword is designated by the user. The designation may be specified directly according to the EPG information, or may be specified according to the program genre (drama, sports, movie, news, etc.). Moreover, if the designation by the user is stored in the memory or the like, it is not necessary to perform step S10 processing every time the power is turned on.

Next, in step S12, it is determined whether the program currently selected is the program designated in step S10, and if it is the designated program, the process proceeds to step S14.

In step S14, it is determined whether or not the elementary stream (ES) of the subtitle exists in the broadcast signal. If the subtitle ES exists, the process proceeds to step S16 to decode the subtitle data from the subtitle ES. Next, in step S18, the retrieval keyword is extracted from the decrypted caption data. Here, for example, a process of extracting a word of a noun from the caption data is performed.

Next, in step S20, appearance frequency is calculated for each extracted keyword. Here, the frequency at which each keyword is extracted within a predetermined time is calculated. In the next step S22, the keywords extracted in the order of appearance frequency calculated in step S20 are displayed on the display panel 124. [

In the next step S24, it is judged by the user's remote controller operation whether or not a search instruction has been issued for any of the displayed keywords. If a search instruction has been issued, the flow advances to step S26 to transmit a search instruction query to the search engine via the Internet 150. [

In the next step S28, the search result is obtained from the search engine. In the next step S30, the search result is displayed on the display screen of the display panel 124. [ After step S30, the process is terminated (END).

On the other hand, if it is determined in step S12 that the program currently selected is not the program designated by the user, the process proceeds to step S32. In step S32, it is determined whether or not a setting for displaying a keyword extracted in the past is determined, and if it is set to be displayed, the process advances to step S22. In step S22, the keywords extracted in the past are displayed in the order of appearance frequency. On the other hand, if the setting for displaying the keyword extracted in the past is not set at step S32, the process is ended (END).

As described above, according to the present embodiment, the keyword extracted from the caption data can be displayed on the display panel 124 and the keyword can be searched by the search engine. Therefore, the broadcast receiving function such as a terrestrial digital wave, ) Can be fused to acquire more information from the search engine with respect to the broadcasted information. Therefore, the user can efficiently search the information related to the program that he / she wished in the program while viewing the program in real time using the search engine.

While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it is needless to say that the present invention is not limited to the above examples. It will be understood by those skilled in the art that various changes or modifications can be made within the scope of the claims, and they are obviously also within the technical scope of the present invention.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, a flash memory, and an optical data storage device. The computer readable recording medium may also be distributed over a networked computer system and stored and executed as computer readable code in a distributed manner.

1 is a schematic diagram showing a configuration of a digital broadcast receiver according to an embodiment of the present invention.

2 is a block diagram showing a functional configuration of a CPU operating in accordance with a program.

3 is a schematic diagram showing a state in which keywords ranked based on appearance frequencies are displayed on the display panel.

4 is a flowchart showing a processing procedure in a digital broadcast receiver.

* Explanation of symbols *

100 digital broadcast receiver

116 signal processor

200 Keyword Extraction Unit

204 Keyword Display Indicator

208 Search instruction

210 Search Result Display

Claims (14)

Extracting a keyword from the caption data included in the broadcast signal, Counting an appearance frequency of the extracted keyword within a predetermined time and calculating an appearance frequency, Determining an appearance frequency ranking of each keyword based on the appearance frequency; Displaying the extracted keyword along with the image by the broadcasting signal in the order of appearance frequency, Executing a keyword search by a search engine through a communication network when a search instruction is received for the displayed keyword; And displaying the search result by the search engine. The method according to claim 1, wherein the keyword extracting step extracts a keyword by a program designated according to EPG information or a program genre. 2. The method according to claim 1, It is determined whether or not a subtitle element stream exists in the broadcast signal, Decoding the caption data from the caption element stream, And extracts a search keyword from the caption data. The method of claim 1, further comprising determining whether to extract the keyword according to a user setting. 5. The method of claim 4, wherein the determining whether to extract the keyword The program obtained by the EPG is compared with the setting by the user, the keyword is extracted when the two match, and the keyword is not extracted when the two do not match. The method of claim 1, further comprising the step of displaying information on the appearance frequency. The method according to claim 1, further comprising the step of displaying, on the screen, the keyword extraction result extracted in the past if the keyword search setting is not set for the program currently being watched. A signal processing unit for obtaining caption data from a broadcast signal, A keyword extracting unit for extracting a keyword from the caption data, An appearance frequency calculating unit for calculating an appearance frequency of the keyword extracted by the keyword extracting unit, A keyword display instruction unit for displaying the extracted keyword together with an image based on the broadcast signal, A search instruction unit for executing a keyword search by a search engine through a communication network when a search instruction is received for the displayed keyword, And a search result display unit for displaying a search result by the search engine, Wherein the keyword display instruction unit displays a plurality of keywords in the order of occurrence frequency. delete The broadcast receiving apparatus according to claim 8, wherein the keyword extracting unit extracts keywords only when a program designated by the user is being received. The method according to claim 8, wherein the keyword extracting unit compares a predetermined program with a setting by a user, extracts a keyword when the two match, and does not extract a keyword if the two do not match. Device. delete A broadcast receiving apparatus comprising: A signal processing unit for obtaining caption data from a broadcast signal; A keyword extraction unit for extracting keywords from the caption data caption data acquired by the signal processing unit, counting the number of occurrences of the extracted keywords within a predetermined time period to calculate an appearance frequency, determining an appearance frequency ranking of each keyword based on the appearance frequency, Displaying the extracted keyword along with an image based on the broadcast signal in the order of appearance frequency, performing a keyword search by a search engine through a communication network when receiving a search instruction for the extracted keyword, A central processing unit for displaying an image; And a display control unit for displaying the keyword and keyword search results extracted from the central processing unit on a display panel. The broadcast receiving apparatus according to claim 13, further comprising a memory for storing a user-designated program for extracting a keyword of the central processing unit.

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