KR20080044548A - Apparatus for receiving digital multimedia broadcasting and method for improving the signal sensitibity thereof - Google Patents

Abstract

A DMB receiver and a method for improving the receive sensitivity of the DMB receiver thereof are provided to adjust the direction of an antenna automatically so that the receive sensitivity of the DMB receiver is the best in correspondence to the receiving state of a DMB signal transmitted from a BS as the DMB receiver moves, thereby removing inconvenience that a user has to rotate the antenna of the DMB receiver or the DMB receiver. A method for improving the receive sensitivity of a DMB(Digital Multimedia Broadcasting) receiver thereof comprises the following steps of: driving the DMB receiver(S210); receiving location information about a position where the DMB receiver is currently positioned(S220); receiving location information about a BS(Base Station) which is transmitting a DMB signal(S230); determining the direction of an antenna so that the receive sensitivity of the transmitting DMB signal can be best and providing the optimal antenna location information to a user through a user interface(S240); and controlling the antenna according to the antenna location information(S250).

Description

{Apparatus for receiving Digital Multimedia Broadcasting and method for improving the signal sensitibity}

1 is a diagram for explaining a digital multimedia broadcasting receiving terminal according to the present invention.

2 is a flowchart illustrating an embodiment of a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention.

3 is a flowchart illustrating another embodiment of a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention.

4 is a flowchart illustrating still another embodiment of a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention.

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

100: control unit 110: antenna module

120: DMB signal processing module 130: signal level comparison unit

140: storage unit 150: output unit

The present invention relates to a digital multimedia broadcasting receiving terminal and a method for improving reception sensitivity of a multimedia broadcasting receiving terminal for viewing a digital multimedia broadcasting in an optimal state.

Digital Multimedia Broadcasting (DMB) is a digital multimedia broadcasting that modulates various multimedia signals and transmits them digitally, and enables audio and video services with CD (Compact Disk) level sound quality and various additional data services. to be.

The digital multimedia broadcasting is not only providing a broadcast signal to a fixed receiver but also a next-generation broadcasting service that provides a high quality multimedia service through a personal portable terminal or a vehicle terminal while moving.

Such digital multimedia broadcasting is based on digital audio broadcasting (DAB), a technology for digital radio, and the concept of multimedia broadcasting can be added to send data information about a video, weather, and location information.

The digital multimedia broadcasting (DMB) can be classified into two types of terrestrial DMB and satellite DMB according to the characteristics of a medium, which is a transmission means, and in the case of satellite digital multimedia broadcasting, it can be divided into fixed service and mobile service. Among them, terrestrial DMB transmits a program on the ground using frequency. In order to transmit the terrestrial DMB signal, VHF channel 12 which is currently empty and channel 8 for military use are used.

In addition, unlike the satellite DMB, the terrestrial DMB transmits a broadcast signal through a base station on the ground. Therefore, in the case of the terrestrial DMB, the radio wave transmitted from the base station shows a phenomenon that the radio wave is attenuated as the distance increases, and the sensitivity is different depending on the reception direction.

Current DMB receiving terminals use an antenna to receive DMB service, and the reception sensitivity is different according to the position and direction of the antenna used. Such a difference in reception sensitivity causes a difference in channel switching or broadcast reception. Will be imported.

Therefore, when the user requests a service in a place where the DMB receiving terminal is located far from the base station, it is inconvenient for the user to directly adjust the direction of the antenna.

In addition, in the case of the current DMB service, it is a reality that many people watch on the move while being mounted on a vehicle. In this case, when the reception sensitivity decreases, the problem of frequently stopping the broadcast as it is without service occurs.

Therefore, if the user wants to use the DMB service using the DMB receiving terminal, the antenna direction is recommended to the user with good reception sensitivity, or the antenna is automatically adjusted in the direction with good reception sensitivity to increase the reception sensitivity of the DMB signal. There is a need to improve user convenience.

The present invention receives the base station information in connection with the terminal location service, and when the first service request is made using this information or when the broadcast is stopped during the service, the DMB reception sensitivity is changed by changing the antenna angle in a good direction of the DMB reception sensitivity. The present invention relates to a digital multimedia broadcasting receiver and a method for improving the reception sensitivity of the multimedia broadcasting receiving apparatus so that the digital multimedia broadcasting can be optimally watched.

In addition, the present invention provides a reception sensitivity of the digital multimedia broadcasting receiver and the multimedia broadcasting receiving apparatus to allow the antenna to be automatically rotated to resume service at the optimal reception sensitivity when the broadcasting stops for a predetermined time or more. It is about improvement method.

On the other hand, the present invention supports a memory mode to memorize the direction of the antenna with a good reception sensitivity in a specific area (location) so that later call the corresponding information to recommend the antenna location with a good reception sensitivity or to automatically switch the position The present invention relates to a digital multimedia broadcasting receiver and a method for improving reception sensitivity of the multimedia broadcasting receiver.

According to an aspect of the present invention, there is provided an apparatus for receiving a digital multimedia broadcasting, comprising: an antenna module for receiving a digital multimedia broadcasting signal; A storage unit which stores a predetermined reference value for comparing whether the received broadcast signal level corresponds to a predetermined signal level; A signal level comparison unit for comparing the signal received through the antenna module with a reference value stored in the storage unit and outputting a result; And a controller for controlling the antenna direction provided in the antenna module to be switched to a position where reception sensitivity is good according to the output of the signal level comparison unit.

When the output value of the signal level comparator indicates a good reception sensitivity, the controller controls to store the antenna direction information corresponding to the current position in the storage unit.

Meanwhile, a method for improving reception sensitivity of a digital multimedia broadcasting receiver according to an embodiment of the present invention for achieving the above object relates to a base station for transmitting a location information and a digital multimedia broadcasting signal of a current location of a terminal. And receiving the location information, determining an antenna direction indicating an optimal reception sensitivity according to the received terminal location and the base station location, and positioning the antenna in the determined antenna direction.

The method may further include outputting the determined antenna direction to a user after the determining of the antenna direction.

Also, a method of improving reception sensitivity of a digital multimedia broadcasting receiver according to another embodiment of the present invention includes: comparing a received digital multimedia broadcasting signal level with a predetermined reference value; Storing the current position and current antenna direction information when the signal level received as a result of the comparison is equal to or greater than a predetermined reference value; And controlling an antenna direction of the digital multimedia broadcasting reception apparatus using the stored antenna direction information.

When the received signal level is smaller than a predetermined reference value as a result of the comparison, the step of rotating the antenna direction by a predetermined angle may further include comparing the received digital multimedia broadcasting signal level with a predetermined reference value.

In addition, the method for improving the reception sensitivity of the digital multimedia broadcasting receiver according to another embodiment of the present invention for achieving the above object comprises the steps of determining whether antenna direction information corresponding to the current position is stored according to the driving of the terminal; ; Positioning antenna in a direction of the antenna when antenna direction information is stored; Comparing the digital multimedia broadcasting signal level received at the antenna position with a predetermined reference value; And processing and outputting the received digital multimedia broadcasting signal when the received signal level is equal to or greater than a predetermined reference value as a result of the comparison.

If the received signal level is not equal to or greater than a predetermined reference value, the step of searching for an antenna direction in which the received signal level becomes greater than or equal to a predetermined reference value while rotating the direction of the antenna at a predetermined angle is further performed. do.

The method may further include updating or re-saving antenna direction information corresponding to the current position when the received signal level is equal to or greater than a predetermined reference value.

 According to the method of improving the reception sensitivity of the digital multimedia broadcasting receiver terminal and the multimedia broadcasting receiver terminal according to the present invention, the reception state of the broadcast signal transmitted from the base station is changed according to the positional movement of the digital multimedia broadcasting receiver terminal. By adjusting the antenna automatically in the state where the reception sensitivity of DMB is good, it eliminates the inconvenience that the user has to rotate the antenna or the terminal of the digital multimedia broadcasting receiver.In particular, the user directly responds to the interruption due to driving. If it fails to do so, it offers the convenience of automatically resuming the service.

Hereinafter, a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal and a digital multimedia broadcasting reception terminal according to the present invention will be described in detail with reference to the accompanying drawings.

In the current DMB terminal, the user needs to arrange the position of the antenna by himself / herself so as to receive the digital multimedia broadcasting signal in the most suitable state. The present invention is a method for solving such inconvenience, recommending a location where the reception sensitivity is expected to be strong by using the current location and base station information, or the antenna automatically rotates to resume or start the service at the optimal reception sensitivity Do it.

1 is a view for explaining a digital multimedia broadcasting receiving terminal according to the present invention.

In the digital multimedia broadcasting reception terminal according to the present invention, referring to FIG. 1, the control unit 100, the antenna module 110, the DMB signal processing module 120, the signal level comparison unit 130, and the storage unit 140 are described. And an output unit 150 and the like.

In order to receive the digital multimedia broadcasting signal in the most suitable state, the controller 100 controls the direction of the antenna provided in the antenna module 110 so that the reception sensitivity of the digital multimedia broadcasting signal is located in the best direction.

The antenna module 110 includes an antenna for receiving a digital multimedia broadcasting signal, and an antenna direction adjusting unit for adjusting the direction of the antenna in a direction for optimally receiving a broadcasting signal transmitted from a base station by the antenna. It is composed.

The storage unit 140 stores a predetermined reference value for comparing whether the received broadcast signal level corresponds to a predetermined signal level.

The signal level comparison unit 130 compares the signal level of the signal received through the antenna module 110 with the reference value stored in the storage unit 140, so that the quality of the received signal is high enough to receive digital multimedia broadcasting. It determines whether it is a suitable state and outputs the result to the control part 100.

The controller 100 controls the antenna module 110 according to the output of the signal level comparator 130 so that the reception sensitivity of the digital multimedia broadcasting signal is in a good state.

Hereinafter, a detailed operation of the digital multimedia broadcasting receiving terminal and the method of improving the reception sensitivity of the digital multimedia broadcasting receiving terminal using the same will be described.

2 is a flowchart illustrating an embodiment of a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention, and FIG. 3 is a flowchart illustrating another embodiment of a method of improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention. 4 is a flowchart illustrating still another embodiment of a method for improving reception sensitivity of a digital multimedia broadcasting reception terminal according to the present invention.

According to an embodiment of the present invention, by using the reception antenna position information transmitted from the base station by using the terminal or the user location and the base station information, providing the antenna direction information with good reception sensitivity to the user or the direction of the antenna in a good reception sensitivity. You can also change the location automatically.

An embodiment for improving the reception sensitivity of a broadcast signal in a digital multimedia broadcasting reception terminal according to the present invention will be described with reference to FIG. 2. First, when the digital multimedia broadcasting reception terminal starts driving (S210), the terminal Receive location information on the current location (S220).

In the process (S220), the location information on the point where the terminal is currently located may be received through a base station transmitting a digital multimedia broadcasting signal, but may be received by other possible methods through a wireless communication module added to the terminal. It's okay.

In addition, the terminal receives the position information on the base station that is transmitting the digital multimedia broadcasting signal that the terminal is currently receiving along with the position information on the current location (S230).

The location information about the base station transmitting the digital multimedia broadcasting signal may be used by extracting the location information of the current base station which is added to a predetermined area of the digital multimedia broadcasting signal frame and transmitted.

When the terminal receives the current location and the location information about the base station that is transmitting the broadcast signal by the step (S220, S230), the control unit 100 of the terminal corresponds to the current location using the current location and the base station location information. The reception sensitivity of the broadcast signal transmitted from the base station determines the direction of the antenna that can be received in the best state.

Subsequently, the terminal provides the user with an optimal antenna position at the current position using the user interface according to the determined information on the antenna direction (S240).

When the optimal antenna position information is provided to the user according to the process (S240), the user adjusts the antenna according to the antenna position information, so that the digital multimedia broadcasting service can be provided in the best state at the current position (S250). ).

In the case of the embodiment of the method for improving the reception sensitivity of the digital multimedia broadcasting receiver according to the present invention performed as described above, it is a useful method that can be used to maintain the broadcast reception sensitivity at the best place in a specific place.

According to the above method, a method of improving reception sensitivity by providing guidance of a single antenna direction or automatic antenna adjustment in a corresponding direction for a specific place is provided. Provides a way to automatically switch to automatically resume broadcasting.

Referring to FIG. 3, another embodiment for improving reception sensitivity of a broadcast signal in a digital multimedia broadcasting reception terminal according to the present invention will first be driven by a user to watch a digital multimedia broadcasting. (S310).

As the digital multimedia broadcasting receiving terminal is driven, the signal received through the antenna of the antenna module 110 is output to the DMB signal processing module 120. The DMB signal processing module 120 detects the reception sensitivity level of the broadcast signal from the signal output from the antenna module 110 and outputs it to the signal level comparison unit 130.

The signal level comparison unit 130 compares the received broadcast signal level output from the DMB signal processing module 120 with the reference signal level stored in the storage 140, and the received broadcast signal is smaller than the reference level. In this case, the corresponding state information is output to the controller 100. Accordingly, the controller 100 determines whether the state in which the received broadcast signal is smaller than the reference level continues for a predetermined time or more (S320).

As a result of the determination (S320), when the received broadcast signal is above the reference level, the antenna direction and reception sensitivity information are stored in the storage unit 140 in correspondence with the current point (S350).

However, when the determination result (S320), the state in which the received broadcast signal is less than the reference level continues for a predetermined time or more, the control unit 100 to the antenna module 110 to search for the antenna direction showing a better reception sensitivity The antenna is rotated a predetermined angle in a predetermined direction by applying a control signal (S330).

The DMB signal processing module 120 detects the received signal level of the broadcast signal output from the antenna module 110 and outputs the signal to the signal level comparison unit 130 while the antenna is rotated by a predetermined angle according to the above process. The signal level and the reference value stored in the storage unit are compared to determine again whether the received signal level is greater than or equal to the reference level (S340).

As a result of the determination (S340), when the received signal level is greater than or equal to the reference level, the storage unit 140 stores the current antenna direction and reception sensitivity information in the corresponding antenna direction corresponding to the current point (S350).

However, if the received signal level does not exceed the reference level as a result of the determination (S340), the controller 100 controls the antenna module 110 to further rotate the antenna by a predetermined angle (S330). The determining step S340 is repeatedly performed.

On the other hand, after the received signal level is higher than the reference level and the reception sensitivity information in the current antenna direction and the corresponding antenna direction is stored in the storage unit 140 (S350), the reception sensitivity check for all directions of the antenna is finished. It is determined (S360).

As a result of the determination (S360), when the reception sensitivity check for all directions of the antenna is finished, the antenna is rotated toward the antenna having the optimal reception sensitivity using the reception sensitivity information according to the antenna direction stored in the storage unit 140. (S370).

When the antenna direction is located according to the above process, the controller 100 may provide the DMB broadcast program service to the user by outputting the DMB broadcast program processed by the DMB signal processing module 120 through the output unit 150. It becomes possible (S380).

On the other hand, the present invention, if the antenna direction having the optimal reception sensitivity at a specific location of the digital multimedia broadcasting receiving terminal is set / recorded according to the above method, in the future to call the service at that location to inform the user of the antenna location or Or it provides a way to automatically set the antenna direction.

Another embodiment of the method for improving the reception sensitivity of the digital multimedia broadcasting reception terminal according to the present invention will be described with reference to FIG. 4. According to the driving of the terminal for digital multimedia broadcasting reception (S410), the controller 100 may include a storage unit ( In operation S420, it is determined whether the antenna direction information for the current position is stored in order to determine the antenna direction providing the optimal reception sensitivity at the current position.

As a result of the determination (S420), when the antenna direction information on the current position is stored, by applying a control signal to the antenna module 110 to position the antenna in the direction according to the stored antenna direction information (S430), corresponding The reception sensitivity of the broadcast signal received at the position is checked (S440).

On the other hand, if the antenna direction information for the current position is not stored (S420), the reception sensitivity of the broadcast signal received at the current position is checked (S440).

Thereafter, it is determined whether the reception sensitivity of the checked broadcast signal is good enough to reproduce the digital multimedia broadcasting signal according to the process (S440) (S450).

As a result of the determination (S450), when the reception sensitivity is not good, the controller 100 controls the antenna module 110 to adjust the direction of the antenna in order to search for the antenna direction having a good reception sensitivity (S460). This process is repeated for all directions until the antenna direction with good reception sensitivity is found.

On the other hand, if it is determined in step S450 that the reception sensitivity is good, the control signal is applied to the DMB signal antenna module 110 to process the signal output from the antenna module 110 to the output unit 150. In order to output the digital multimedia broadcasting service to the user (S340).

With the above process, the controller 100 stores the antenna direction information in the current state maintained by the previous steps (S420 to S460) in correspondence with the information on the current position of the broadcast receiving terminal and stores it in the storage unit 140. (S480).

By the above process, the antenna direction information at the current position stored by the storage unit 140 is used again to set an antenna position having an optimal reception sensitivity at the initial start-up of the terminal or according to a change in the broadcast reception point according to the position movement ( S420, S430).

In the above, the method for improving reception sensitivity of the digital multimedia broadcasting receiving terminal and the digital multimedia broadcasting receiving apparatus according to the present invention has been described in detail. However, the present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention. Therefore, changes and modifications are included in the present invention without departing from the spirit of the invention, such facts will be apparent to those skilled in the art.

According to the present invention, in response to the change in the reception state of the broadcast signal transmitted from the base station according to the positional movement of the digital multimedia broadcasting receiver terminal, the user automatically adjusts the antenna with a good reception sensitivity of the DMB, thereby allowing the user to receive the digital multimedia broadcasting. The inconvenience of having to rotate the antenna or the terminal of the terminal is effective.

In addition, when a user watches a digital multimedia broadcasting receiver while moving, the position of the antenna is automatically changed so that the reception sensitivity becomes good when the reception sensitivity of the DMB decreases as the position is moved. Due to this, there is an effect of preventing reception in the middle of viewing. In particular, when the user does not directly respond to the interruption due to driving, etc., it provides the convenience of automatically resuming the service.

Claims (9)

An antenna module for receiving a digital multimedia broadcasting signal; A storage unit which stores a predetermined reference value for comparing whether the received broadcast signal level corresponds to a predetermined signal level; A signal level comparison unit for comparing the signal received through the antenna module with a reference value stored in the storage unit and outputting a result; And And a controller configured to control the direction of the antenna provided in the antenna module to be changed to a position where reception sensitivity is good according to the output of the signal level comparator. The method of claim 1, And when the output value of the signal level comparison unit indicates a good reception sensitivity, the controller controls to store the antenna direction information corresponding to the current position in the storage unit. Receiving, by the terminal, location information on a current location and location information on a base station transmitting a digital multimedia broadcasting signal; Determining an antenna direction indicating an optimal reception sensitivity according to the received terminal location and base station location; And Positioning the antenna in the direction of the determined antenna; receiving sensitivity improvement method of the digital multimedia broadcasting receiving apparatus, characterized in that it comprises a. The method of claim 3, wherein And after the determining of the antenna direction, outputting the determined antenna direction to a user is further performed. Comparing the received digital multimedia broadcasting signal level with a predetermined reference value; Storing the current position and current antenna direction information when the signal level received as a result of the comparison is equal to or greater than a predetermined reference value; And And controlling the antenna direction of the digital multimedia broadcasting receiver using the stored antenna direction information. The method of claim 5, If the received signal level is smaller than a predetermined reference value as a result of the comparison, the step of rotating the direction of the predetermined angle antenna and comparing the received digital multimedia broadcasting signal level with a predetermined reference value is further performed. A method for improving reception sensitivity of a broadcast reception device. Determining whether antenna direction information corresponding to a current position is stored according to driving of the terminal; Positioning antenna in a direction of the antenna when antenna direction information is stored; Comparing the digital multimedia broadcasting signal level received at the antenna position with a predetermined reference value; And And processing and outputting the received digital multimedia broadcasting signal when the received signal level is equal to or greater than a predetermined reference value as a result of the comparison. The method of claim 7, wherein If the received signal level is not equal to or greater than a predetermined reference value, the step of searching for an antenna direction in which the received signal level becomes greater than or equal to a predetermined reference value while rotating the direction of the antenna at a predetermined angle is further performed. A method for improving reception sensitivity of a digital multimedia broadcasting receiver. The method of claim 7, wherein And if the received signal level is equal to or greater than a predetermined reference value, updating or newly storing antenna direction information corresponding to the current position.

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