KR20070016011A - Method for automatic channel setting for digital multimedia broadcasting reception and digital multimedia broadcasting receiver using thereof - Google Patents

Abstract

The present invention provides an automatic channel setting method for receiving digital multimedia broadcasting (DMB), comprising: receiving GPS location information, including a current location information obtained from the received GPS location information, and a terrestrial DMB transmitter at the current location. Comparing the terrestrial DMB transmitter location information of the terrestrial DMB transmitter, determining whether reception of the DMB broadcast signal is to be changed from another terrestrial DMB transmitter to another terrestrial DMB transmitter at the current location, and channel map information of the terrestrial DMB transmitter to be changed; And a step of preloading and applying the preloaded channel map information when the broadcast signal reception range of the terrestrial DMB transmitter to be changed is entered.

According to the present invention, when the terrestrial DMB service is provided through the terrestrial DMB receiver during the movement, the transmitter of the terrestrial DMB broadcasting service is changed according to the movement, and when the frequency is changed, the channel scan operation is performed again. To improve the shortcomings of terrestrial DMB receivers, the receiver receives the location information of the current terrestrial DMB receiver using a global positioning system (GPS), receives a transmitter information database on a fast information channel (FIC), and compares the two information. In this case, the channel map can be automatically set and the channel can be changed to solve the inconvenience of rescanning of the channel during long distance travel.

DMB, scan, GPS, location information, transmitter, channel map, FIC, FIG, MSG, mobile reception

Description

Automatic channel setting method for receiving digital multimedia broadcasting and digital multimedia broadcasting receiver using the same

1 is an ensemble structure diagram of the EUREKA-147 system.

2 is a flowchart of an automatic channel setting method when receiving a digital multimedia broadcasting according to the present invention.

3 is a block diagram of a TII database.

4 is a block diagram of a digital multimedia broadcasting receiver using an automatic channel setting method when receiving digital multimedia broadcasting according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: RF module 120: baseband module

130: FIG 135: MSG

140: channel map change determination module 145: memory

150: GPS module 160: multimedia chip

170: display device 180: speaker

The present invention relates to an automatic channel setting method for receiving digital multimedia broadcasting (DMB) and a digital multimedia broadcasting receiver using the same. More specifically, in the case of receiving a terrestrial DMB service through a terrestrial DMB receiver during the movement, the terrestrial DMB service is used according to the movement. When the transmitter of the DMB broadcasting service is changed and the frequency is changed, the channel scan operation is performed again, thereby improving the disadvantage of the conventional terrestrial DMB receiver, which was inconvenient for the user. Automatic channel setting method when receiving a digital multimedia broadcasting that receives a transmitter and receives a transmitter information database on a fast information channel (FIC), compares the two information, and automatically sets a channel map and changes a channel when the transmitter changes. Number of digital multimedia broadcasts used Groups relate.

Digital Audio Broadcasting (DAB) is the joint project name of Eureka-147 (European REserch Coordination Agency project-147), which was formed in Europe since 1987, and can provide high-quality audio service in mobile reception.

In the early stage of DAB development, the main purpose was to provide audio and data broadcasting.However, in the stage of domestic introduction, audio-based DAB was called Digital Multimedia Broadcasting (DMB), which can provide audio, video and data services. The European Eureka-147 system was adopted as a national standard.

Such DMB broadly includes all broadcasts such as fixed DMB (DVB-T, DVB-S), mobile DMB (DAB-T, DAB-S), data broadcasting, cable broadcasting, etc. Limited use. Therefore, in Korea, DMB is used as a term for "mobile digital multimedia broadcasting."

DMB is largely divided into terrestrial DMB and satellite DMB. DAB of digital audio broadcasting and PMSB (Personal Mobile Satellite Broadcasting), which is a part of MMB (Mobile Multimedia Broadcasting) business of telecommunications operators, are integrated into multimedia broadcasting focused on video, audio and data services in the era of broadcasting and telecommunication convergence Evolved into satellite DMB.

1 is an ensemble structure diagram of the EUREKA-147 system. As shown in Fig. 1, the broadcast structure of the EUREKA-147 system used for DAB or DMB is digitally modulated on one frequency, unlike AM / FM broadcasting, which transmits one broadcast on one frequency. The broadcaster service and a plurality of service components that are components are simultaneously transmitted.

That is, the ensemble structure of the EUREKA-147 system includes a fast information block (FIB) including various information related to service and FIG (Fast Information Group), which is a subelement thereof. It consists of a fast information channel (FIC) composed of a real audio service and a main service channel (MSC) composed of a bundle of sub-channels.

On the other hand, in implementing a EUREKA-147 based DAB or DMB receiver, service data such as ensemble, service, service component, and program type (PTY) through fast information channel (FIC) parsing Is one of the functions required for DAB or DMB receiver. These ensembles, services, and service components are searched by using a frequency manual input method in which a user directly inputs a frequency to detect a signal, or a frequency auto-scan method similar to FM / AM broadcasting. By effectively using the searched ensemble, service, service component and PTY, the listener can effectively listen to the broadcast to be listened to.

With respect to such EUREKA-147 based DAB or DMB receivers, Utility Model Registration No. 290274 (Digital Audio Broadcasting Receiver with External Display Means), 288055 (Portable Digital Audio Broadcasting Receiver), 20-369938 (Eureka- 47-based broadcast receiver) and No. 262879 (Digital Audio Broadcast Receiver with Removable Storage Means) are disclosed, and Patent Registration No. 398603 (Analog and Digital Broadcast Combined Receiver) is disclosed. Publication No. 2003-0025602 (Digital Audio Broadcasting Receiver with Video Receiving Function), Patent Application No. 2001-0058732, Patent Application No. 2001-0058733 (Analog and Digital Broadcasting Combined Receiver and Receiving Method), Patent Application No. 2002 -0033364 (Digital Broadcast Receiving Device) and Patent Application No. 2002-003108 (Digital Audio Room with Storage Media for Interoperating with Demodulation and External Devices) It is disclosed in the receiver).

In such a conventional DMB or DAB receiver, when a user is provided with a DMB service using a portable DMB receiver or a vehicle-mounted DMB receiver, rescanning of a channel is required according to regional movement.

In other words, if the transmitter of the terrestrial DMB broadcasting service changes according to the movement of the area and the frequency of use is changed, when the user detects a poor reception, the channel is rescanned without being sure whether the area is a blind spot or the channel frequency is changed. Should be done.

In this case, auto-scanning is performed according to the user's button operation to reset the searched ensemble, service, service component and PTY.

This rescan takes a long time because all VHF frequency bands need to be rescanned, and the user cannot receive DMB broadcasts during this time.

Therefore, especially when the terrestrial DMB service is provided through the terrestrial DMB receiver during the movement, when the transmitter of the terrestrial DMB broadcasting service changes according to the movement and the frequency is changed, the channel map can be automatically set and the frequency can be changed according to the channel map. The need for a solution is growing.

SUMMARY OF THE INVENTION An object of the present invention is that when a terrestrial DMB service is provided through a terrestrial DMB receiver while moving, the transmitter of the terrestrial DMB broadcasting service changes according to the movement, and when the frequency is changed, the channel scan operation is performed again. To improve the shortcomings of terrestrial DMB receivers, it receives the location information of the current terrestrial DMB receiver using GPS, receives the transmitter information database on the high-speed information channel (FIC), compares the two information, and automatically changes the channel when the transmitter changes. The present invention provides an automatic channel setting method for receiving a digital multimedia broadcast that can solve the inconvenience of rescanning a channel during a long distance movement by setting a map and changing a channel.

Another object of the present invention is to provide a digital multimedia broadcasting receiver using an automatic channel setting method when receiving the digital multimedia broadcasting.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for automatically setting a channel map by using the automatic channel setting method when receiving the digital multimedia broadcasting.

In order to achieve the above technical problem, the present invention provides an automatic channel setting method when receiving a digital multimedia broadcasting (DMB), the method comprising the steps of receiving GPS location information, the current location information obtained from the received GPS location information and the current location Comparing location information of a plurality of terrestrial DMB transmitters including terrestrial DMB transmitters, determining whether reception of a DMB broadcast signal is to be changed from a terrestrial DMB transmitter at a current location to another terrestrial DMB transmitter; Preloading channel map information of a scheduled terrestrial DMB transmitter and applying the preloaded channel map information when entering a broadcast signal reception range of the scheduled terrestrial DMB transmitter; Provides a channel setting method.

In the automatic channel setting method at the time of digital multimedia broadcasting reception according to the present invention, the plurality of terrestrial DMB transmitter position information is preferably obtained using TII (Transmitter Identification Information) information included in a synchronization channel. .

In the automatic channel setting method when receiving a digital multimedia broadcasting according to the present invention, the step of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter, the current position The method may include determining whether one of the plurality of terrestrial DMB transmitter position information approaches the position of the terrestrial DMB transmitter.

In the automatic channel setting method for receiving digital multimedia broadcasting according to the present invention, the step of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter is performed. And checking whether the reception sensitivity of the broadcast signal transmitted through the terrestrial DMB transmitter at the location is deteriorated.

Further, in the automatic channel setting method at the time of receiving the digital multimedia broadcasting according to the present invention, the step of pre-loading the channel map information of the terrestrial DMB transmitter to be changed, loading the channel map information of the terrestrial DMB transmitter to be stored previously stored It can be configured to include steps.

In the automatic channel setting method when receiving a digital multimedia broadcasting according to the present invention, the step of applying the pre-loaded channel map information when entering the broadcast signal reception range of the terrestrial DMB transmitter to be changed, the If the TII information is changed, the method may include applying the preloaded channel map information.

The present invention also provides a digital multimedia broadcasting receiver comprising: a GPS module for receiving a GPS signal, an RF module for receiving a terrestrial DMB broadcasting signal, and converting and demodulating the received terrestrial DMB broadcasting signal into a digital form, and then performing video and audio. And changing the channel map by comparing the baseband module separated into a data signal, the TII information obtained from the output of the baseband module and including location information of a plurality of terrestrial DMB transmitters, and current location information obtained from the GPS module. The present invention provides a digital multimedia broadcasting receiver including a channel map change determination module for determining a memory and a memory for loading the channel map to be changed.

In the digital multimedia broadcasting receiver according to the present invention, it may be configured to further include a multimedia decoding module for decoding the video signal, receiving the channel map information to be changed from the memory and transmitting it to the RF module.

In addition, the digital multimedia broadcasting receiver according to the present invention may be configured to further include a nonvolatile memory for storing channel maps of the plurality of terrestrial DMB transmitters.

The present invention also provides a function of receiving GPS location information, a function of comparing the current location information obtained from the received GPS location information with a plurality of terrestrial DMB transmitter location information including a terrestrial DMB transmitter at the current location, and DMB broadcasting. A function of determining whether the reception of a signal is to be changed from a terrestrial DMB transmitter at the current location to another terrestrial DMB transmitter, a function of preloading channel map information of the terrestrial DMB transmitter to be changed, and the terrestrial DMB transmitter to be changed A computer readable recording medium having recorded thereon a program for realizing a function of applying the preloaded channel map information when the broadcast signal reception range is reached is provided.

In the computer-readable recording medium according to the present invention, the plurality of terrestrial DMB transmitter position information is preferably obtained using TII information included in a synchronization channel.

Further, in the computer-readable recording medium according to the present invention, the function of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter, the plurality of the at the current position. The terrestrial DMB transmitter location information of the terrestrial DMB transmitter may be configured to include a function of checking whether the position of the transmitter approaches.

Further, in the computer-readable recording medium according to the present invention, the function of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter is determined at the current position. It may be configured to include a function for checking whether the reception sensitivity of the broadcast signal transmitted through the terrestrial DMB transmitter is degraded.

Further, in the computer-readable recording medium according to the present invention, the function of preloading channel map information of the terrestrial DMB transmitter to be changed includes a function of loading channel map information of the terrestrial DMB transmitter to be stored previously stored in advance. Can be configured to

In addition, in the computer-readable recording medium according to the present invention, the function of applying the preloaded channel map information when entering the broadcast signal reception range of the terrestrial DMB transmitter to be changed, the TII information of the synchronization channel is If changed, it may be configured to include a function of applying the preloaded channel map information.

Hereinafter, an automatic channel setting method at the time of receiving a digital multimedia broadcasting of the present invention and a digital multimedia broadcasting receiver using the same will be described in more detail with reference to the accompanying drawings.

2 is a flowchart illustrating an automatic channel setting method when receiving a digital multimedia broadcast according to the present invention.

First, GPS location information is received (S110). GPS location information is received through, for example, a receiving module that receives GPS information to a terrestrial DMB receiver.

Thereafter, the current location information obtained through the received GPS location information is compared with a plurality of terrestrial DMB transmitter location information including a terrestrial DMB transmitter at the current location (S120).

A plurality of transmitter position information of the terrestrial DMB can be obtained through, for example, TII information in a transmitter identification information (TII) database.

3 is a diagram illustrating a configuration of a TII database.

As shown, the TII signal is located in a synchronization channel on the structure of the DAB transmission frame.

The TII database created through this includes a plurality of TII information. For example, as shown in the TII k, the location information of each transmitter is described including latitude and longitude.

Thereafter, it is determined whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter (S130).

For example, whether the terrestrial DMB broadcast signal is being received through the terrestrial DMB transmitter A at the current location and the terrestrial DMB transmitter B is capable of receiving the terrestrial DMB broadcast signal or is currently moving to the service area of the terrestrial DMB transmitter B. If it is determined, it is possible to determine whether to change the terrestrial DMB transmitter. In other words, it is checked whether one of the plurality of terrestrial DMB transmitter position information approaches the position of the terrestrial DMB transmitter from the current position or whether the reception sensitivity of the broadcast signal transmitted through the terrestrial DMB transmitter A at the current position is deteriorated. We can judge by

Afterwards, the channel map information of the terrestrial DMB transmitter, which is to be changed, is preloaded (S140).

For example, a channel map of a terrestrial DMB transmitter, which is due to be changed, may be received in advance through a broadcast signal and loaded in advance.

Alternatively, for example, channel map information of a terrestrial DMB transmitter to be changed, which is stored in ROM or flash RAM in the terrestrial DMB receiver, is preloaded.

Subsequently, when the broadcast signal reception range of the terrestrial DMB transmitter, which is due to be changed, is entered, the preloaded channel map information is applied (S150).

This is to apply the pre-loaded channel map information when the TII information of the synchronization channel is changed.

4 is a block diagram of a digital multimedia broadcasting receiver using an automatic channel setting method when receiving digital multimedia broadcasting according to the present invention.

The digital multimedia broadcasting receiver includes an RF module 110, a baseband chip 120, an OSD module 150, a multimedia chip 160, a display device 170, and a speaker 180.

The RF module 110 receives a terrestrial DMB broadcast signal.

The baseband module 120 converts and demodulates the received broadcast signal into a digital form and separates it into a video, audio, and data signal.

In this process, data corresponding to FIG 130 and MSG 135 may be configured.

The GPS module 150 receives GPS location information.

The channel map change determination module 140 determines whether to change the channel map by comparing the position information of the plurality of terrestrial DMB transmitters obtained on the synchronization channel in FIG 130 with the current position information obtained by the GPS module 150.

The memory 145 stores the channel maps of the plurality of terrestrial DMB transmitters and loads the channel maps under the control of the channel map change determination module 140. For example, a memory such as a ROM or a flash memory can be used.

The multimedia chip 160 generates a video signal to be displayed on the display apparatus 170 using the MPEG-2 TS obtained from the MSG 140 and the channel map transmitted from the channel map change determination module 140. In addition, the RF module 110 controls the frequency to be automatically changed using the channel map.

In addition, the speaker 180 outputs an audio signal using the MUSICAM signal obtained from the MSG 140.

When the digital multimedia broadcasting receiver using the automatic channel setting method when receiving the digital multimedia broadcasting according to the present invention is applied to a vehicle DMB, even if the user turns off the power, the power can be continuously supplied, so It is also possible to change the channel map as necessary.

Although the present invention has been described in detail, this is for illustrative purposes only, and the protection scope of the present invention is not limited thereto, and the protection scope of the present invention is defined through the description of the claims.

As described above, according to the present invention, if the terrestrial DMB service is provided through the terrestrial DMB receiver during the movement, the transmitter of the terrestrial DMB broadcasting service changes according to the movement, and if the frequency is changed, the channel scan operation is performed again. When the transmitter is changed by receiving the location information of the current terrestrial DMB receiver using GPS and receiving a transmitter information database on a fast information channel (FIC) by improving the shortcomings of the conventional terrestrial DMB receiver. By automatically setting the channel map and changing the channel, the inconvenience of rescanning the channel during long distance travel can be solved.

Claims (15)

As an automatic channel setting method when receiving a digital multimedia broadcasting (DMB), Receiving GPS location information, Comparing the current location information obtained from the received GPS location information with a plurality of terrestrial DMB transmitter location information including a terrestrial DMB transmitter at the current location; Determining whether reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current location to another terrestrial DMB transmitter; Preloading channel map information of the terrestrial DMB transmitter to be changed; Applying the preloaded channel map information when entering the broadcast signal reception range of the scheduled terrestrial DMB transmitter; Automatic channel setting method when receiving a digital multimedia broadcast comprising a. The method of claim 1, The plurality of terrestrial DMB transmitter location information, An automatic channel setting method when receiving a digital multimedia broadcast, which is obtained by using transmitter identification information (TII) information included in a synchronization channel. The method of claim 1, Determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current location to another terrestrial DMB transmitter, And checking whether the terrestrial DMB transmitter accesses the position of one of the plurality of terrestrial DMB transmitters at a current location. The method of claim 1, Determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current location to another terrestrial DMB transmitter, And checking whether the reception sensitivity of the broadcast signal transmitted through the terrestrial DMB transmitter at the current position is deteriorated. The method of claim 1, Pre-loading the channel map information of the terrestrial DMB transmitter to be changed, And loading channel map information of the pre-stored terrestrial DMB transmitter. The method of claim 2, The step of applying the pre-loaded channel map information when entering the broadcast signal reception range of the terrestrial DMB transmitter to be changed, And applying the preloaded channel map information when the TII information of the synchronization channel is changed. As a digital multimedia broadcasting receiver, A GPS module for receiving a GPS signal, An RF module for receiving a terrestrial DMB broadcast signal; A baseband module for converting and demodulating the received terrestrial DMB broadcasting signal into a digital form and separating the received terrestrial DMB broadcasting signal into a video, audio and data signal; A channel map change determination module for determining whether to change a channel map by comparing TII information obtained from an output of the baseband module and including position information of a plurality of terrestrial DMB transmitters with current position information obtained from the GPS module; A memory for loading the channel map to be changed Digital multimedia broadcast receiver comprising a. The method of claim 7, wherein And a multimedia decoding module for decoding the video signal and receiving channel map information to be changed from the memory and transmitting the changed channel map information to the RF module. The method of claim 7, wherein And a nonvolatile memory for storing channel maps of the plurality of terrestrial DMB transmitters. The ability to receive GPS location information, Comparing the current location information obtained through the received GPS location information with a plurality of terrestrial DMB transmitter location information including a terrestrial DMB transmitter at the current location; Determining whether reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current location to another terrestrial DMB transmitter; Preloading channel map information of the terrestrial DMB transmitter to be changed; A function of applying the preloaded channel map information when entering the broadcast signal reception range of the scheduled terrestrial DMB transmitter. A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 10, The plurality of terrestrial DMB transmitter location information, A computer-readable recording medium obtained by using TII information included in a synchronization channel. The method of claim 10, The function of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter, And a function of checking which one of said plurality of terrestrial DMB transmitter position information approaches a location of said terrestrial DMB transmitter at a current location. The method of claim 10, The function of determining whether the reception of the DMB broadcast signal is to be changed from the terrestrial DMB transmitter at the current position to another terrestrial DMB transmitter, And checking whether the reception sensitivity of the broadcast signal transmitted through the terrestrial DMB transmitter at the current position is deteriorated. The method of claim 10, The function of pre-loading the channel map information of the terrestrial DMB transmitter to be changed, And a function of loading channel map information of the pre-stored terrestrial DMB transmitter. The method of claim 11, The function of applying the pre-loaded channel map information when entering the broadcast signal reception range of the terrestrial DMB transmitter to be changed, And applying the preloaded channel map information when the TII information of the sync channel is changed.

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