KR100810238B1 - DMB terminal for improving the receiving function using dual tuner in a terrestrial DMB system and it's controlling method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a DMB terminal.

2. The technical problem to be solved by the invention

The present invention employs two tuners in a conventional DMB terminal, so that even if one tuner is in use, an additional tuner receives and scans services of ensembles having different frequency bands, thereby providing more additional services and convenience of use. There is a purpose.

3. Summary of the Solution of the Invention

The present invention, a key input unit for receiving input from the user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; And a controller configured to receive an input of the key input unit, determine an additional service of the additional service provider, and control an output format of the application unit with respect to the determined additional service.

4. Important uses of the invention

The present invention is used for terrestrial DMB system.

Terrestrial DMB, Ensemble, Dual Tuner, Additional Services

Description

DMB terminal for improving the receiving function using dual tuner in terrestrial DMV system and its control method {DMB terminal for improving the receiving function using dual tuner in a terrestrial DMB system and it's controlling method}

1 is a system diagram of an embodiment of a terrestrial DMB system for implementing a general DMB service.

2 is an exemplary diagram showing a structure of an ensemble used in a terrestrial DMB system.

3 is a block diagram showing the configuration of a DMB terminal capable of receiving a general terrestrial DMB broadcast signal.

4 is a block diagram showing the configuration of a DMB terminal capable of receiving a DMB broadcast signal according to the present invention;

5A and 5B illustrate screen examples of a menu screen for setting an additional service in a DMB terminal according to the present invention;

6 is a flowchart illustrating a method of providing an EPG information service of an additional service according to the present invention;

FIG. 7 is a screen exemplary view illustrating a screen providing changed EPG information of the additional service of FIG. 6. FIG.

8 is a flowchart illustrating a method of providing a component merging service of an additional service according to the present invention.

FIG. 9 is a screen exemplary view illustrating a screen providing a component merging service of the additional service of FIG. 8. FIG.

10 is a flowchart illustrating a method of providing a program switching service of an additional service according to the present invention.

FIG. 11 illustrates a screen illustrating a screen for providing a program switching service of the additional service of FIG. 10. FIG.

12 is a flowchart illustrating a method of providing a preview service of an additional service according to the present invention.

FIG. 13 is a screen exemplary view illustrating a screen providing a preview service of an additional service of FIG. 12. FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital multimedia broadcasting (DMB) terminal, and more particularly, to a DMB terminal and a control method thereof for improving reception using a dual tuner in a terrestrial DMB system.

Terrestrial Digital Multimedia Broadcasting (DMB) is a multimedia broadcasting service including video based on the Digital Audio Broadcasting (DAB) (Eureka-147) system, a European digital radio broadcasting standard that simultaneously provides CD-quality high-quality audio and data services. Is the world's first domestic system standard to provide.

The advantage of such terrestrial DMB broadcasting over general digital broadcasting such as Advanced Television Systems Committee (ATSC) or Digital Video Broadcasting (DVB) is that it can listen to the broadcast on the go. In other words, if the DMB user has a DMB receiving terminal, the user can listen to the broadcast as much as he / she is on the move.

Another feature of terrestrial DMB broadcasting is that broadcasting services are not limited to video services, and audio and data services can also be received through broadcasting. Therefore, more channels and services are available through terrestrial DMB than fixed terrestrial digital broadcasting.

1 is a system diagram of an embodiment of a terrestrial DMB system for implementing a general DMB service.

As shown in FIG. 1, the terrestrial DMB receives a broadcasting signal from a DMB broadcasting center 101 and a DMB broadcasting center 101 which broadcasts the broadcasting contents in order to provide broadcasting contents to a user, and transmits the broadcasting signals to a base station. The broadcast transmission center 102, the base station 103 receives the broadcast signal from the DMB broadcast transmission center 102 and retransmits it, the DMB mobile terminal 104 receives the broadcast signal and outputs it to the user, and a vehicle-mounted terminal ( 105).

Through such a configuration, the broadcasting signal is transmitted from the DMB broadcasting transmission center 102 to the base station 103 by using the airwave VHF channel 8 (180 MHz to 186 MHz) and the channel 12 (204 MHz to 210 MHz), and the base station 103 ) Transmits a broadcast signal to the DMB mobile terminal 104 and the in-vehicle terminal 105 which are terrestrial DMB receivers.

The terrestrial DMB broadcast signal is composed of ensemble units, and one ensemble consists of several services. Each service includes service components.

That is, one ensemble becomes a basic element constituting the terrestrial DMB broadcast signal, and the user can listen to a specific service by selecting a service in the ensemble. Usually, one ensemble may have a plurality of video services, audio services, and data services.

2 is an exemplary diagram illustrating a structure of an ensemble used in a terrestrial DMB system.

Referring to FIG. 2, an ensemble used in a terrestrial DMB system includes a plurality of services and service components constituting each service. The structure of this ensemble follows the DAB standard proposed by Eureka-147. Thus, as shown, the ensemble 201 labeled "DAB ENSEMBLE ONE" is comprised of services named "ALPHA 1 RADIO" 202, "BETA RADIO" 203, and "ALPHA 2 RADIO" 204. It can be seen that each service is composed of a plurality of service components 205 to 210 again.

The service in this ensemble is included in a part of one ensemble frame called the main service channel (MSC) 214 to 218, and the configuration information of this main service channel is a fast information channel (FIC). It can be found through the multiplex configuration information (MCI) 211 and service information (SI) 212 received at.

In fact, when the receiving terminal selects and tunes a specific ensemble, it does not immediately extract and display a service included in the main service channel of the ensemble, but first displays the multiplex configuration information 211 and service information 212 of the fast information channel. After analysis, we can show the services of the main service channel.

Looking at the currently proposed Korean terrestrial DMB system, the number of ensembles allocated to the Korean terrestrial DMB is six, and each ensemble includes several services.

3 is a configuration diagram illustrating a configuration of a DMB terminal capable of receiving a general terrestrial DMB broadcast signal.

Referring to FIG. 3, a radio frequency (RF) tuner 301 for receiving an ensemble of a terrestrial DMB desired by the user and a signal processing of an ensemble received from the RF tuner 301 and configuring a service selected by the user in the ensemble Decoder 303 for receiving the service component filtered by the DMB DSP 302 and the DMB DSP 302 for filtering and transmitting the service component, and decoding and transmitting the inputted service component in the form of data that can be output. ), The application unit 304 for receiving the decoded data from the decoder unit 303 and outputting the data in a form desired by the user, and a controller 305 for controlling the overall operation of the DMB terminal.

Since the general DMB terminal has one RF tuner 301, only one ensemble can be received. That is, when the DMB terminal is turned on, first, the controller 305 controls the RF tuner 301 to scan the entire frequency band to generate ensemble list information, and for each ensemble, a service list (Electronic Program Guide, hereinafter referred to as "EPG"). Will be created). In addition, the collected SI (Service Information) of the ensemble serves as a basis for information on which a user selects a program (service) to be viewed.

Once the user selects a service based on the collected EPG information, the RF tuner 301 is tuned to the frequency at which the ensemble is transmitted to play the service, and the DMB DSP 302 selects the user within the ensemble. The service component constituting the service is filtered and transmitted to the decoder 303.

The decoder 303, which receives the service component constituting the service, decodes each service component data into a form that can be output, and handes it over to the application unit 304 to display it in the form desired by the user.

However, in the case of the existing DMB terminal, since there is one RF tuner 301, if a user is watching a specific program (service) or is scanning an ensemble, the user cannot simultaneously accept data of an ensemble having a different frequency band, thereby restricting the service. There is a problem to receive.

The present invention was invented to solve the above problems, and by employing two tuners in the existing DMB terminal, even if one tuner is in use, an extra tuner receives and scans services of different ensembles with different frequency bands. Its purpose is to provide more additional services and ease of use.

The present invention for achieving the above object, a key input unit for receiving input from the user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; And a controller configured to receive an input of the key input unit, determine an additional service of the additional service provider, and control an output format of the application unit with respect to the determined additional service.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

4 is a block diagram illustrating a configuration of a DMB terminal capable of receiving a DMB broadcast signal according to the present invention.

Referring to FIG. 4, a first RF tuner 401 for receiving an ensemble of a terrestrial DMB system selected by a user, an ensemble being received through a first RF tuner to provide additional services to a user, and transmitted on another frequency. Signaling the ensemble received by the second RF tuner 402, the first RF tuner 401, and the second RF tuner 402 to receive the ensemble, and filtering the service components constituting the service selected by the user in the ensemble. Decoder 404, Decoder for receiving the filtered service component from the DMB DSP 403 and the DMB DSP 403 for transmission, and decoding and transmitting the inputted service component into data in a form that can be output. The application unit 405 for receiving the decoded data at 404 and outputting it in a desired form, and selecting or manipulating a function supported by the DMB terminal. Depending on the type of the supplementary service and the user key input unit 406 for inputting the key, and is set for group consists of a control unit 407 for controlling the overall operation of the DMB terminal.

First, the first RF tuner 401 receives an ensemble of a predetermined frequency selected by a user in a terrestrial DMB system. The first RF tuner 401 receives an ensemble of a predetermined frequency selected by the user, and transmits the received ensemble to the DMB DSP 403 to provide a broadcast service to the user.

The second RF tuner 402 receives an ensemble being received by the first RF tuner and an ensemble being transmitted at another frequency in order to provide an additional service to the user, and transmits the ensemble to the DMB DSP 403. In the embodiment of the present invention, the second RF tuner 402 is configured for the additional service and the key input unit 406 when the first RF tuner 401 is in use, for example, when the user is receiving a program of a specific ensemble. When a request for additional service from) is inputted, a corresponding ensemble is received using the second RF tuner 402 to provide additional services and convenience for the user.

Here, the additional service provided in the ensemble input through the second RF tuner 402 includes an EPG providing service and two programs that promptly notify the user of the changed EPG information when the EPG information changes while the user watches the program. A component merging service that shows merging specific components at the same time or only, a program switching service that allows users to quickly switch by decoding two programs simultaneously, and when playing an ensemble input to the first RF tuner through the main screen of the DMB terminal. And a preview service for allocating a program of the ensemble inputted by the second RF tuner on the screen of the main screen to a small area to provide a preview of the program.

The DMB DSP 403 processes the ensembles input from the first RF tuner 401 and the second RF tuner 402 and filters and transmits service components constituting a service selected by the user in the ensemble.

The DMB DSP 302 converts and demodulates the ensemble transmitted from the first RF tuner 401 or the second RF tuner 402 into a digital form, and then, in the demodulated signal, the video service, audio service, and data service. The service component is separated into service components, and the service components selected by the user in the service component are filtered under the control of the controller 407 and transmitted to the decoder 404.

According to the embodiment of the present invention, if the service selected by the user from the ensembles received by the first RF tuner 401 or the second RF tuner is a video service, the DMB DSP 403 processes the input ensembles to signal processed ensembles. In operation, each service and service component are separated from each other, and the component of the video service selected by the user is filtered and transmitted to the decoder 404.

The decoder 404 receives the components of the video service, the audio service, and the data service that are filtered and received from the DMB DSP 403, and decodes each of the input service components to each decoder and transmits the received components.

In the embodiment of the present invention, the service components filtered by the DMB DSP 403 are input, decoded in the form of data that can output each service component, and transmitted to the application unit 405.

The decoder 404 performs decoding using a video decoder, an audio decoder, and a data decoder according to the input service component under the control of the controller 407.

As described above, the decoding performance function for each service component input from the decoder unit 404 is a well-known technology and can be easily understood by those skilled in the art, so a detailed description thereof will be omitted.

The application unit 405 receives data of the service component decoded by the decoder 404 and outputs the data in a form desired by the user.

The application unit 405 may output the service component data input from the decoder unit 404 according to the control of the controller 407, and may include a method of outputting the service component data in a preset method to the DMB terminal. Can be.

First, in the output method preset in the DMB terminal, when the service component data input to the application unit 405 is data of a video service, it is input as a moving picture expert group (MPEG) 2 demux under the control of the control unit 407. The video signal of the demuxed and demuxed data is decoded by an MPEG AVC (Advanced Video Coding (H.264)) decoder and displayed on the screen, and the audio signal is decoded by an MPEG bit sliced arithmetic coding (BSAC) decoder to be used through a speaker. Is output.

When the service component data input to the application unit 405 is data of an audio service, the service component data is decoded by a MUSICAM decoder under the control of the control unit 407 and output through the speaker.

Finally, when the service component data input to the application unit 405 is data service data, the service component data is decoded by the MOT decoder under the control of the controller 407 and output through the screen.

Here, data services provided by the DMB terminal include a slide show, a transport protocol expert group (TPEG), a broadcasting web service (BWS) service, and the like. Data services such as Slide Show, TPEG, and BWS are well known technologies, and thus can be easily understood by those skilled in the art, and thus detailed descriptions thereof will be omitted.

The output method according to the control of the controller 407 includes a method of outputting according to the execution of the set additional service and a request of the additional service input from the key input unit 406 to the controller 407.

According to the exemplary embodiment of the present invention, as the additional service is executed, a method of simultaneously outputting the service component data of the video service and the data service input from the application unit 405, or merging and outputting the service component data of the video service and the audio service, etc. Is done.

The key input unit 406 includes a plurality of operation keys for outputting an operation signal for selecting or operating a function supported by the DMB terminal to the control unit 407. The user may input a predetermined key of the key input unit 406 to execute a desired additional service function.

The control unit 407 is configured to provide additional services and convenience of use input to the control unit 407 when the first RF tuner 401 is in use, for example, when a user watches a predetermined program. The RF tuner 402 is used to control the reception of the corresponding ensemble.

The controller 407 separates the ensemble input from the first RF tuner 401 or the second RF tuner 402 into a video service, an audio service, and a data service and a service component in the DMB DSP 403. Controls the service to filter the service component selected by the user from the service component.

In addition, the controller 407 controls the decoder 404 to perform decoding on the corresponding decoder among the video decoder, the audio decoder, and the data decoder according to the service component filtered by the DMB DSP 403.

The application unit 405 controls the data decoded and transmitted by the decoder unit 404 according to the set additional service, and controls the data to be output in a desired form according to the output form of the additional service.

The additional service set here includes an EPG providing service for promptly notifying the user of the changed EPG information when the EPG information changes while the user is watching a program, a component merging service showing two programs simultaneously or by merging specific components only. A program switching service that enables users to quickly switch programs by simultaneously decoding a program, and when a program of an ensemble inputted to the first RF tuner through the main screen of the DMB terminal is reproduced, the second RF tuner is input on the screen of the main screen. It includes a preview service that provides a preview of the program by allocating the program of the ensemble to a small area.

The description of the EPG providing service, the component merging service, the program switching service, and the preview service of the additional service of the type desired by the user will be described with reference to FIGS. 5 to 13.

5A and 5B illustrate screen examples of a menu screen for setting an additional service in a DMB terminal according to the present invention.

Referring to FIG. 5A, additional services provided by the DMB terminal include "1. EPG information providing service", "2. component merging service", "3. program switching service", and "4. preview service". do.

In the embodiment of the present invention, when the user selects "1. EPG information provision service" from the menu of FIG. 5A, a menu for setting and releasing "1. EPG information provision service" is shown as shown in FIG. 5B. . The user can select and set the EPG information providing service from the provided menu. Other additional services can be set in this manner.

And it will be apparent that each additional service can be set by the user and can be set to an initial value at the time of terminal manufacturing by the DMB terminal manufacturer.

6 is a flowchart illustrating a method of providing an EPG information service of an additional service according to the present invention.

Referring to FIG. 6, when an EPG providing service is configured to receive an ensemble of a predetermined frequency selected by a user using a first RF tuner 401 of a DMB terminal (601), the controller 407 may receive a second RF. The tuner 402 receives all ensemble, including an ensemble of a predetermined frequency being received by the first RF tuner 401 (602).

The second RF tuner 402 that receives the ensemble transmits the ensemble to the DMB DSP 403. When the ensemble is input from the second RF tuner 402, the DMB DSP 403 separates the input ensemble for each service under the control of the controller 407, and generates a data service component in the separated data service to generate EPG information. Only the filter is transmitted to the decoder unit 404 (603).

As the data service component input from the DMB DSP 403 is input to the decoder unit 404, the controller 407 controls to perform decoding using the data decoder in order to decode the input data service component. The decoder 404 that has decoded transmits the decoded data service component to the application unit 405 (604).

The application unit 405 receiving the decoded data service component searches for and analyzes the service and the service component of the ensemble under the control of the controller 407 (605). The controller 407 generates EPG information using the service and service component information of the searched and analyzed ensemble (606).

Although not shown, the generated EPG information is compared with the EPG information previously stored in the EPG DB (607). If the comparison value between the prestored EPG information and the currently generated EPG information is the same, the EPG information is generated again after a predetermined time without any output under the control of the controller 407, thereby generating the prestored EPG information and Compare.

Otherwise, if the previously stored EPG information is different from the currently generated EPG information (608), the controller 407 stores the currently generated EPG information in the EPG DB (609). The priority of the changed EPG information to be displayed on the screen is determined (610).

In the embodiment of the present invention, the priority of displaying the EPG information on the screen is determined so that the control unit 407 determines the program closest in time to the program currently being viewed. However, it will be apparent that such a priority may include a method of setting a favorite program by the user and determining the priority according to the favorite program.

When the priority of the programs to be displayed on the screen is determined by the controller 407, the application unit 405 outputs the changed EPG information on the screen as illustrated in FIG. 7 (611).

FIG. 7 is an exemplary screen diagram illustrating a screen for providing changed EPG information of the additional service of FIG. 6.

When the EPG information is changed when viewing the ensemble received using the first RF tuner 401 of the DMB terminal in which the EPG information providing service according to the present invention is set, as shown in FIG. 7, the DMB The changed EPG information is displayed on the lower end of the main screen 701 of the terminal in a short sentence 702.

By checking the short text 702 displayed on the screen, the user can quickly recognize the changed EPG information even when watching a video.

In addition, the controller 407 having performed the above-described process generates the EPG information repeatedly at predetermined time intervals, and controls to continuously provide the changed EPG information to the user.

8 is a flowchart illustrating a method of providing a component merging service of an additional service according to the present invention.

Referring to FIG. 8, an ensemble of a predetermined frequency selected by a user is received by using a first RF tuner 401 of a DMB terminal in which a component merging service is set, and when the program is viewed (801), the controller (from the key input unit 406) is controlled. When the selection of the other ensemble is input to 407, the controller 407 controls to receive an ensemble different from the ensemble received by the user selected first RF tuner 401 using the second RF tuner 402 (802). ). The ensemble received by the first RF tuner 401 or the second RF tuner 402 is transmitted to the DMB DSP 403.

The DMB DSP 403 that receives the ensemble received by the first RF tuner 401 or the second RF tuner 402 separates the input ensemble by services and service components (803). The DMB DSP 403 then delivers a combinable list of respective service components to the control unit 407.

The control unit 407 receiving the service component combinable list from the DMB DSP 403 transmits the combinable list to the application unit 405 to provide a combinable list on the screen of the DMB terminal (804).

The user checks the combination list provided on the screen and selects a service component to be combined using a predetermined key provided in the key input unit 406 (S805).

When the selection of the combined service component is input from the key input unit 406, the controller 407 controls to transmit the service component of the combinable list selected by the DMB DSP 403 to the decoder unit 404.

The decoder 404 decodes the service component of the inputtable combinable list under the control of the controller 407 and transmits the service component to the application unit 405 (806).

The application unit 405 combines and outputs the service components decoded and input from the decoder unit 404 (807).

Here, the combinable list provided by the DMB DSP 403 means that the first RF tuner 401 does not visually overlap with a service currently being viewed, or may combine two services by replacing a specific component. . That is, a combination of other services such as "video service and audio service", "audio service and data service" and "video service and data service".

For example, when listening to the "music broadcasting" program of the KBS using the first RF tuner 401, the "subtitle broadcasting (weather information)" of the SBS can be watched using the second RF tuner 402. In addition, if you do not need to listen to the announcer while watching the MBC "K-1" program using the first RF tuner 401, the second RF tuner 402 listens to the "music broadcast" of the SBS MBC You can listen to SBS music while watching K-1.

At this time, in the case of a video program, the voice should be excluded or the size should be adjusted. When removing or adjusting the audio of the video, it will be obvious that there must be one audio decoder and one video decoder.

FIG. 9 is an exemplary screen diagram illustrating a screen for providing a component merging service of the additional service of FIG. 8.

In the embodiment of the present invention, a combination of "video service and data service" is displayed so that two programs are combined and visually shown at the bottom of the screen without being audibly overlapped with the program being viewed.

As shown in FIG. 9, when a user selects "subtitle broadcasting (weather information)" of SBS and selects "video service and data service" of the combinable list when viewing the "Haesin" program of KBS, the main screen is displayed. KBS's "Haesin" program is displayed, and SBS's "caption broadcasting" (weather information) is superimposed on the bottom of the screen and displayed in short.

In this way, the user can select a combination list provided by the DMB terminal to watch a program using one tuner and simultaneously watch another program using another tuner.

10 is a flowchart illustrating a method of providing a program switching service of an additional service according to the present invention.

Referring to FIG. 10, when a user views a program by receiving an ensemble of a predetermined frequency selected by a user using a first RF tuner 401 of a DMB terminal in which a program switching service is set, the control unit 407 receives a second RF. The tuner 402 receives an ensemble of a program previously designated by the user (112).

The application unit 405 outputs the ensemble program received by the first RF tuner 401 on the screen of the DMB terminal, and the DMB DSP 403 displays the ensemble received by the second RF tuner 402. In operation S113, the video service component of the ensemble is filtered and transmitted to the decoder 404.

The decoder 404, which receives the filtered video service component from the DMB DSP 403, decodes the video service component to the video decoder under the control of the controller 407, and transmits the decoded data to the application unit 405 (114).

At this time, the application unit 405 waits without outputting the program of the ensemble received through the second RF tuner 402 under the control of the control unit 407.

When a predetermined key is input from the key input unit 406 to the control unit 407 to switch to a program of an ensemble received through the second RF tuner 402, the control unit 407 returns the application unit. By controlling 405, the program of the ensemble received through the first RF tuner 401 is controlled to be in a standby state so as not to be outputted, and the program of the ensemble received through the second decoded second RF tuner 401 as a DMB. The screen of the terminal is switched and output (step 116).

When the user wants to watch the program of the ensemble received by the first RF tuner 401 again and inputs the program switching key of the key input unit 406 in a predetermined manner, the control unit 407 returns to the application unit 405. Control the program to the standby state so that the program of the ensemble received through the second RF tuner 402 is not output, and control so that the program of the ensemble received through the second RF tuner 401 is output on the screen of the DMB terminal. do.

And if the user wants to watch both programs of the ensemble received by the first RF tuner 401 and the second RF tuner 402, the broadcast program of the ensemble received by one RF tuner is watched, and the other RF The broadcast program of the ensemble received from the tuner is stored so that both programs can be viewed.

FIG. 11 is an exemplary screen diagram illustrating a screen for providing a program switching service of the additional service of FIG. 10.

As shown in Fig. 11, when a user views a KBS " distributed " program in an ensemble received by a first RF tuner 401 of a DMB terminal in which a program switching service is set, it is previously designated through the second RF tuner 402. When the ensemble of MBK's "K-1" program is input, the control unit 407 controls the application unit 405 to display the KBS "receive" program received by the first RF tuner 401 on the screen of the DMB terminal. In the state of outputting to the " K-1 " program of the MBC received by the second RF tuner 402, the standby state is maintained without outputting.

At this time, when the program switching key is input to the control unit 407 from the key input unit 406, the control unit 407 controls the application unit 405, the "delivery" program of the KBS received by the first RF tuner 401 It maintains the standby state without outputting the control, and outputs the "K-1" program of the MBC received by the second RF tuner 402 on the screen of the DMB terminal on the screen.

Through this method, the user can quickly switch between the two programs and see only the desired part. If both programs are to be viewed, the user can record and check another program while viewing the program.

12 is a flowchart illustrating a method of providing a preview service of an additional service according to the present invention.

Referring to FIG. 12, when a user views a program by receiving an ensemble of a predetermined frequency selected by a user using a first RF tuner 401 of a DMB terminal in which a preview service is set, the user selects a program of another ensemble. In operation 122, the controller 407 controls to receive an ensemble of a program selected by a user using the second RF tuner 402.

The application unit 405 outputs the ensemble program received by the first RF tuner 401 on the screen of the DMB terminal, and the DMB DSP 403 displays the ensemble received by the second RF tuner 402. In operation 123, the video service component of the ensemble is filtered and transmitted to the decoder 404.

The decoder 404, which receives the filtered video service component from the DMB DSP 403, decodes the video service component to the video decoder under the control of the controller 407, and transmits the decoded data to the application unit 405 (124).

The application unit 405 that receives data of the program of the ensemble received from the decoder 404 by the first RF tuner 401 and the program of the ensemble received by the second RF tuner 402 is controlled by the controller 407. In accordance with the present invention, the program of the ensemble input from the first RF tuner 401 is displayed on the main screen of the DMB terminal, and the program of the ensemble input from the second RF tuner 402 is scaled to match the size of the sub-screen. The display is displayed on a predetermined area of the screen (125).

Here, the technique of scaling the program of the ensemble received by the second RF tuner 402 to match the size of the sub-screen of the DMB terminal, synthesizing the main screen and the sub-screen and outputting it on the screen of the DMB terminal is known. The description will be omitted.

The user can continue to watch the program currently being viewed through the main screen of the DMB terminal, and can preview the program of the selected ensemble through the sub screen.

If the user is interested in a program displayed on the sub-screen and wants to view the main screen, the user can switch the program displayed on the sub-screen to the main screen by inputting a predetermined key provided in the key input unit 406. . When the switching key of the main screen and the sub-screen is input from the key input unit 406 to the control unit 407 (126), the control unit 407 is a program of the ensemble received by the second RF tuner 402 in the application unit 405 Is controlled to be displayed on the main screen of the DMB terminal, and the program of the ensemble received by the first RF tuner 401 is displayed to be displayed on the sub-screen of the DMB terminal (127).

FIG. 13 is an exemplary screen diagram illustrating a screen providing a preview service of an additional service of FIG. 12.

If the user wants to preview the "K-1" program of the MBC when the user views the KBS "hashed" program received from the first RF tuner 401 using the DMB terminal with the preview service set, the user inputs the key input unit. The predetermined key of 406 is input to select the MBK " K-1 " program.

The control unit 407 which receives the MBK "K-1" program from the key input unit 406 receives the ensemble corresponding to the MBK "K-1" program using the second RF tuner 402.

As shown in FIG. 13, the KBS "received" program received by the first RF tuner 401 is displayed on the main screen 131 of the DMB terminal, and the MBC received by the second RF tuner 402 is displayed. The "K-1" program is displayed on the subscreen 132.

The user can continue to watch the KBS "Haesin" program currently being viewed through the main screen 131 of the DMB terminal, and can preview the "K-1" program of the selected MBC through the sub-screen 132. have.

In addition, when the user wants to see the MBK " K-1 " program displayed on the sub-screen 132 as the main screen, the user inputs a predetermined key provided in the key input unit 406, and is displayed on the main screen 131. The KBS "discard" program can be displayed on the sub-screen 132, and the MBC "K-1" program displayed on the sub-screen 132 can be displayed on the main screen 131 for viewing.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited by the drawings.

As described above, the present invention employs two tuners in the existing DMB terminal, so that even if one tuner is in use, an additional tuner receives and scans services of ensembles having different frequency bands, thereby providing more additional services and convenience for use. Has the effect of providing.

Claims (11)

delete delete delete In a terrestrial DMB terminal which improves a reception function using a dual tuner in a terrestrial digital multimedia broadcasting (DMB) system, A key input unit for receiving an input from a user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; A control unit for receiving an input of the key input unit, determining an additional service of the additional service providing unit, and controlling an output format of the application unit with respect to the determined additional service; The additional service, To provide an EPG for the entire ensemble of the DMB system, During the reception of a broadcast service according to the first predetermined ensemble through the broadcast receiver, the additional service provider sequentially tunes the second RF tuner under the control of the controller to transmit all ensemble EPG information to the application unit. The application unit DMB terminal, characterized in that for updating the transmitted EPG information for the entire ensemble. The method of claim 4, wherein the application unit The user is receiving a broadcast service according to the first predetermined ensemble through a broadcast receiver, And comparing the EPG information with pre-stored EPG information and notifying the user of the changed EPG information when a change occurs in the EPG information. In a terrestrial DMB terminal which improves a reception function using a dual tuner in a terrestrial digital multimedia broadcasting (DMB) system, A key input unit for receiving an input from a user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; A control unit for receiving an input of the key input unit, determining an additional service of the additional service providing unit, and controlling an output format of the application unit with respect to the determined additional service; The additional service, Merging and outputting the service component of the first predetermined ensemble received through the broadcast receiving unit and the service component of the second predetermined ensemble received through the additional service providing unit; The service component of the first predetermined ensemble received through the broadcast receiving unit and the service components of the second predetermined ensemble received through the additional service providing unit are received to generate a combinable list, and the application unit is generated. The broadcast receiver and the additional service provider to control the broadcast receiver and the additional service provider to transmit the selected service component combination to the application unit according to a user's selection input. DMB terminal, characterized in that for merging and outputting the service components of the second predetermined ensemble received through the additional service providing unit. The method of claim 6, wherein the combinable list The service component of the first predetermined ensemble received through the broadcast receiving unit and the service component of the second predetermined ensemble received through the additional service providing unit each have one attribute of video, audio, and data, and the video And so that duplication does not occur between audio attributes. In a terrestrial DMB terminal which improves a reception function using a dual tuner in a terrestrial digital multimedia broadcasting (DMB) system, A key input unit for receiving an input from a user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; A control unit for receiving an input of the key input unit, determining an additional service of the additional service providing unit, and controlling an output format of the application unit with respect to the determined additional service; The additional service, Switching to a broadcast service according to the second predetermined ensemble provided through the additional service providing unit while receiving a broadcast service according to the first predetermined ensemble provided through the broadcast receiving unit, While receiving a broadcast service according to the first predetermined ensemble through the broadcast receiving unit, under the control of the controller, the broadcast service according to the second predetermined ensemble is decoded by the additional service providing unit to decode the first predetermined ensemble. The broadcast service according to the ensemble and the broadcast service according to the second predetermined ensemble are transmitted to the application unit, and according to the user's selection input, the broadcast service according to the first predetermined ensemble delivered by the application unit and the second DMB terminal, characterized in that for outputting by switching the broadcast service according to a predetermined ensemble. In a terrestrial DMB terminal which improves a reception function using a dual tuner in a terrestrial digital multimedia broadcasting (DMB) system, A key input unit for receiving an input from a user; A broadcast receiver for receiving a first predetermined ensemble through a first radio frequency (RF) tuner and receiving a broadcast service selected by the user; An additional service providing unit configured to receive a second predetermined ensemble through a second RF tuner and provide an additional service to the user; An application unit connected to the broadcast receiving unit and the additional service providing unit to output the broadcast service output from the broadcast receiving unit and the additional service output from the additional service providing unit under control of a controller; A control unit for receiving an input of the key input unit, determining an additional service of the additional service providing unit, and controlling an output format of the application unit with respect to the determined additional service; The additional service, Providing a preview of a broadcast service according to the second predetermined ensemble provided through the additional service providing unit while receiving a broadcast service according to the first predetermined ensemble provided through the broadcast receiving unit, During reception of a broadcast service according to the first predetermined ensemble through the broadcast receiver, under the control of the controller, the broadcast service according to the second predetermined ensemble is decoded through the additional service provider to decode the first predetermined ensemble. The broadcast service according to an ensemble and the broadcast service according to the second predetermined ensemble are transmitted to the application unit, and the application unit transmits the broadcast service according to the first predetermined ensemble through the additional service providing unit. DMB terminal, characterized in that for allocating the broadcast service according to the second predetermined ensemble to a predetermined area and outputs it simultaneously. delete A control method for improving a reception function using a dual tuner in a terrestrial digital multimedia broadcasting (DMB) system, A first step of receiving an ensemble of a first frequency selected by a user using a first radio frequency (RF) tuner of the terrestrial DMB terminal; A second step of receiving an ensemble of a second frequency selected by a user using a second RF tuner of the terrestrial DMB terminal; A third step of signal-processing the ensemble received in the first step or the second step, separating the services by service, and filtering and transmitting a service component selected by the user in the ensemble; A fourth step of decoding the inputted service component filtered in the third step and transmitting the decoded data; And A fifth step of receiving the data decoded in the fourth step and outputting the received data according to a set additional service, The additional service, For convenience of the user, an EPG providing service for providing EPG information on the entire ensemble, a component merging service for outputting two non-upper layers, and a program switching service providing fast channel switching between two programs. And a preview service for receiving and outputting two broadcasts at the same time.

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