KR20070015725A - Processing method for digital broadcasting signal - Google Patents

Abstract

The present invention relates to a digital broadcast signal processing method, comprising: receiving a digital broadcast signal, separating data related to program information included in the digital broadcast signal from the digital broadcast signal during reception of the digital broadcast signal, Classifying related data according to a preset keyword to form index data, and storing index data when reception of a digital broadcast signal is completed. As a result, by processing the APG data and the EPG data during the booting of the broadcast signal to form index data, it is possible to drastically reduce the withdrawal time of information on a program desired by a user.

Digital, broadcast signal, satellite signal, reception, APG data, program, search

Description

Digital Broadcast Signal Processing Method {PROCESSING METHOD FOR DIGITAL BROADCASTING SIGNAL}

1 is a block diagram of a digital broadcast receiver according to the present invention;

2 is a flowchart illustrating a digital broadcast processing process according to the present invention.

Explanation of symbols on the main parts of the drawings

10: CPU 20: APG Database

25: APG classification

The present invention relates to a digital broadcast signal receiving method, and more particularly, to a digital broadcast signal processing method capable of shortening the overall broadcast processing time by reducing the search time of APG or EPG data.

In general, digital broadcasting includes digital satellite broadcasting and digital terrestrial broadcasting. In the case of digital satellite broadcasting, digital broadcasting signals are transmitted and received using satellites.

Digital satellite broadcasting compresses video data, audio data and additional data to MPEG2 standard and transmits and receives it through satellite. Here, the additional data includes Advanced Program Guide (APG) data, which is program guide information, and EPG (Electronic Program Guide) data in the case of digital terrestrial broadcasting. Unlike video and audio data that is output through a TV as soon as it is received, APG data or EPG data is stored in a separate database. When a user searches, APG data or EPG data corresponding to a user input condition is displayed. Is displayed on the panel.

The satellites for transmitting and receiving digital satellite broadcasts include Round, Oval-2 and Oval-3 satellites, and additional satellites will be rounded. As the number of satellites increases and the broadcast signal increases, the APG data to be received from the satellites increases, and the booting time increases. Similarly, in the case of digital terrestrial broadcasting, when the number of channels increases, the booting time increases because the EPG data to be received increases.

On the other hand, when the user wants to search for a desired program among APG or EPG data stored in the database, the user inputs a keyword, for example, a program name, a producer or actor name, a channel, a time, and the like, and the CPU inputs the user. Search a database using a keyword. However, as satellites increase or the number of channels increases, the time required for searching the database also increases because the APG or EPG data increases.

As such, the increase in boot time due to the increase in the number of satellites and channels, and the increase in search time required to search for desired APG or EPG data, is the time that the user has to wait for boot or search results to be displayed. This means that it is increased. Therefore, it may cause inconvenience to the user.

Accordingly, it is necessary to find a way to reduce the search time of the APG or EPG data, so as to facilitate the user's convenience.

Accordingly, it is an object of the present invention to provide a digital broadcast signal processing method that can facilitate user convenience by reducing the search time of APG or EPG data.

The method of the present invention for achieving this object comprises the steps of: receiving a digital broadcast signal; Separating data related to program information included in the digital broadcast signal from the digital broadcast signal during the reception of the digital broadcast signal; Classifying data related to the program information according to a preset keyword to form index data; And when the reception of the digital broadcast signal is completed, storing the index data.

The data related to the program information is at least one of APG data and EPG data, and the step of forming the index data may include: category, program name, author name, producer name, production company, actor name, channel name, The method may include classifying according to at least one field of the airing time.

In the forming of the index data, it is preferable to classify APG data or EPG data classified according to the field according to a keyword.

As the keyword, at least one of alphabetical order, alphabetical order, and time order may be used.

A user sequentially inputting the fields and keywords; The method may further include extracting and displaying information on a program corresponding to a field selected by the user and a keyword from the index data.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In general, a digital broadcast receiver can receive and output a digital satellite broadcast or a digital terrestrial broadcast, and the present invention can index APG data or EPG data while receiving a broadcast signal from a digital broadcast receiver, thereby retrieving program information later. Try to save time.

The present invention can be applied not only when receiving digital satellite broadcast but also when receiving digital terrestrial broadcast. In the following embodiment, a case where a digital satellite broadcast is received by a digital broadcast receiver will be described as an example.

1 is a block diagram showing the structure of a digital broadcast receiver according to the present invention. As shown, the digital broadcast receiver includes a tuner 5, a demodulator 7, a CAS 15, an integrated smart card 11, an MPEG2 demux 17, an MPEG2 decoder 19, and an audio DAC 21. , A video encoder 23, an APG database 20, an APG classifier 25, a CPU 10, an input unit 3, and a display panel 4.

The tuner 5 receives a satellite signal of a high frequency band received through an antenna and tunes to the required channel, and the demodulator 7 demodulates the satellite signal tuned by the tuner 5 by a quadrature phase shift keying (QPSK) method. Perform the conversion to transport stream (TP).

The CAS 15 performs user authentication and descrambling of the input broadcast signal using the integrated smart card 11. In general, in case of pay per channel (PPC) or pay per view (PPV) of satellite broadcasting, the broadcasting station scrambles and transmits TV program and data service signals, and at the receiver, the subscriber is authorized to receive Only descramble the service. The integrated smart card 11 stores the channel information that a user can view when a paid channel is applied, depending on whether the subscriber applied for a paid channel or a paid viewing. Usage information is stored. The CAS 15 manages to receive the service by descrambling the received channel based on the information stored in the integrated smart card 11.

The MPEG2 demux 17 separates the broadcast signal of the channel descrambled by the CAS 15 into an audio signal, a video signal, and APG data, respectively. Here, the separated APG data is stored in the APG database 20 through the APG classifier 25.

In the MPEG2 decoder 19, an audio signal and a video signal compressed in MPEG2 are restored, and the audio DAC 21 converts the digital audio signal into an analog form and outputs it through a speaker.

The video encoder 23 is a kind of D / A converter that receives a digital video signal from the MPEG decoder 19 and converts it into an analog TV signal.

The APG database 20 stores APG data, which is program guide data included in satellite signals, and index data for easily finding a storage location of each program along with APG data.

The index data is data in which fields for which respective programs can be searched, for example, categories, program names, author names, producer names, production companies, actor names, channel names, airtimes, and the like are sorted according to each keyword. The user can easily search for information about each program according to the keyword input.

The APG classification unit 25 forms index data stored in the APG database 20. The APG classification unit 25 classifies APG data according to fields and keywords in real time when the satellite signal is booted. For example, as shown in Table 1 below, when classifying according to a category representing a type of program, the APG classification unit 25 sports, entertainment, and previews each program included in the input APG data. The table is classified into subfields such as culture, drama, and news. Here, each program included in one category is sorted according to alphabetical order, alphabetical order, time order, and the like, and includes brief information about each program, for example, information about a broadcast date and time, a channel, and the like.

Subfield keyword Program name channel Airtime sports A ... ... ... ... ... ... ... S Sports News Sports Today ... CH 05 CH 23 7/22 14:00 7/25 23:00  Entertainment A Pyramid of Dreams ... CH 12 7/23 22:00 N Open the fridge ... CH 35 7/24 18:30 ...   Preview education A Emergency rescue ... CH 11 7/23 23:30 N Green Documentary ... CH 09 7/25 19; 30 ... drama A Wild Love Winter Sonata ... CH 26 CH 32 7/25 22:00 7/24 21:00 N 18 years old CH 54 7/25 22:00 ...

In this way, the index data in which the programs are classified according to the fields and categories by the APG classification unit 25 is generated for each field in a table form and stored in the APG database 20.

The CPU 10 controls the operation of each component including the tuner 5 and the demodulator 7 according to a command input by the user through the input unit 3, and when the user selects a search for a program, the user According to the input of the index data stored in the APG database 20 is searched and output through the display panel (4). At this time, since the index data arranged in a table form is stored in the APG database 20, information about a program having a keyword desired by a user can be quickly retrieved.

A process of processing a broadcast signal in a digital broadcast receiver having such a configuration will be described with reference to FIG. 2.

First, when the user selects a desired channel, the satellite signal of the channel selected by the user is received by the tuner 5 (S200). The received satellite signal is demodulated by the demodulator 7 and then judges whether it is a channel authenticated by the user in the CAS 15. As a result of the determination, the satellite signal is provided to the MPEG2 demux 17 and separated into the APG data, the audio signal, and the video signal, respectively, and decompressed by the MPEG2 decoder 19 (S210). The decompressed audio signal is converted into an analog audio signal in the audio DAC 21 and output, and the video signal is converted into an analog video signal in the video encoder 23 and output through the display panel 4. .

While the received satellite signal is booted, the APG data separated through the MPEG2 demux 17 is classified according to each field in the APG classifier 25, and then again sorted alphabetically or alphabetically or timely, as shown in Table 1 below. The index data in the form of a table as described above is formed (S220). Such index data is formed for each field and stored in the APG database 20 (S230).

While the index data is generated and stored in the APG database 20, when reception of the satellite signal is completed (S240), the CPU 10 stops the operation of the APG classification unit 25 or index data according to each category. The APG classification unit 25 may continue to operate until is completed.

After the index data for the APG data is completed, when the user selects one of the fields for searching the program, the category, program name, author name, producer name, producer, actor name, channel name, and broadcast time, In operation S250, the CPU 10 causes the display panel 4 to display a window for inputting a keyword. At this time, in the case of a field having a lower field, a window for selecting a lower field is displayed. When the user sequentially inputs the subfields and keywords (S260), the CPU 10 extracts information corresponding to the corresponding fields, subfields and keywords from the APG database 20 (S270). At this time, when the user selects a field, the CPU 10 accesses a table including the corresponding index data, and when a subfield and a keyword are input, the CPU 10 retrieves and displays information on a program having a matching keyword from the table. (S280). At this time, when there are several programs corresponding to the keyword, the CPU 10 displays each program name on the display panel 4, and when the user selects one program, detailed information about the program, for example, Display information about the author's name, actor's name, production company, and a short storyline.

In this manner, in the digital broadcast signal processing method, the APG data is classified according to a field and a keyword during reception of satellite signals to form index data, and the formed index data is stored in the APG database 20. Accordingly, when searching for information about a program desired by a user, information about a program corresponding to a field and a keyword selected by the user may be directly extracted from the index data. Therefore, in the related art, when searching for information about a program desired by a user, the search time is relatively long as all information in the APG database 20 needs to be searched. However, in the present invention, only index data is searched, and thus, APG data is fetched. I can save time drastically. In addition, since the search time of the APG data is reduced, it is possible to make up for the time increase when the satellite signal is booted.

As described above, according to the present invention, by processing the APG data and EPG data during the booting of the broadcast signal to form the index data, it is possible to significantly reduce the withdrawal time of the information for the program desired by the user.

Further, in the detailed description of the present invention, specific embodiments have been described, which should be taken as exemplary, and various modifications may be made without departing from the technical spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

Claims (5)

Receiving a digital broadcast signal; Separating data related to program information included in the digital broadcast signal from the digital broadcast signal during the reception of the digital broadcast signal; Classifying data related to the program information according to a preset keyword to form index data; And when the reception of the digital broadcast signal is completed, storing the index data. The method of claim 1, The data related to the program information is at least one of APG data and EPG data, The forming of the index data may include classifying the APG data or EPG data according to at least one field among a category, a program name, an author name, a producer name, a producer, an actor name, a channel name, and a broadcast time. Digital broadcasting signal processing method The method according to claim 1 or 2, The forming of the index data may include classifying APG data or EPG data classified according to the field according to a keyword. The method of claim 3, wherein The keyword is a digital broadcast signal processing method, characterized in that at least one of alphabetical order, alphabetical order, time order. The method of claim 4, wherein A user sequentially inputting the fields and keywords; And extracting and displaying information on a program corresponding to a field selected by the user and a keyword from the index data.

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