KR20100062772A - Digital multimedia broadcasting receiver and method of channel-setup of the same - Google Patents

Abstract

PURPOSE: A DMB receiver deciding the location of a DMB receiver, and a channel-setup method of the same are provided to control operating state of the DMB receiver according to a result. CONSTITUTION: A DMB(Digital Multimedia Broadcasting) receiver(100) comprises a GPS(Global Positioning System) module(110), a comparison unit(120) and a controller(130). The GPS module senses the current position of the DMB receiver. The comparison unit stores data about the service area of DMB in a preset region. The comparison unit determines whether the detected location of the GPS module is within the service area or not. According to the decision result of the comparison unit, the controller controls the operation state of the DMB receiver.

Description

Digital multimedia broadcasting receiver and its channel setting method {DIGITAL MULTIMEDIA BROADCASTING RECEIVER AND METHOD OF CHANNEL-SETUP OF THE SAME}

The present invention relates to a multimedia broadcasting receiver and a channel setting method, and more particularly, to a multimedia broadcasting receiver and a channel setting method for determining whether a location of a receiver is a visible region using stored location information.

The present invention is derived from a study conducted as a part of the IT growth engine technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. ]

Digital Multimedia Broadcasting (DMB) is an audio-focused method of Digital Audio Broadcasting (DAB), the name of the joint project Eureka (Eureka: European REsearch Coordination Agency project) -147. Is named video center, a broad concept that encompasses audio, video, and data services.

Digital multimedia broadcasting is largely divided into terrestrial DMB and satellite DMB. Terrestrial DMB provides high quality audio, video and data multimedia services, and can be enjoyed by anyone anytime and anywhere based on its excellent mobility. It is a new concept satellite broadcasting service that can watch multi-channel multimedia broadcasting through a vehicle receiver.

This digital multimedia broadcasting is Eureka-147 standard, and the transmission method uses COFDM (Coded Orthogonal Frequency Division Multiplexing) to divide 1.2Mbps bandwidth into multiple video and audio channels and to multiplex it. In addition to broadcasting and radio broadcasting, various additional information data are transmitted.

However, such DMB broadcasts may inevitably generate blind spots due to blind spots caused by tunnels or buildings, and when moving to other areas while watching DMB broadcasts, the broadcasts become inaccessible or scan for new frequencies serviced in other areas. There is a problem to be done.

In order to solve the above problems, the present invention uses the GPS module to search the current position of the DMB receiver, and whether the current receiver position is in the visible region based on data stored in the visible region and the visual acuity region. An object of the present invention is to provide a DMB receiver capable of determining and a channel setting method thereof.

According to an aspect of the present invention, a GPS module for detecting a current position of a digital multimedia broadcasting receiver and data for a visible and hearing region of a digital multimedia broadcasting in a predetermined region are stored and detected by the GPS module based on the data. A digital multimedia broadcasting receiver may include a comparator configured to determine whether the located position is a visible region, and a controller configured to control an operation state of the digital multimedia broadcast receiver according to a determination result of the comparator.

The controller may operate the receiver in a standby state when the position of the digital multimedia broadcasting receiver determined by the comparator is not the visible region.

The comparison unit stores respective frequency information and service channel information for receiving digital multimedia broadcasting in a plurality of predetermined regions, and determines which region of the plurality of predetermined regions is located in the digital multimedia broadcasting receiver. have.

The controller may set a frequency and a channel of the digital multimedia broadcasting receiver to a frequency and a channel serviced in an area where the digital multimedia broadcasting receiver is located.

According to another aspect of the present invention, there is provided a method for determining a location of a digital multimedia broadcasting receiver by a GPS module, determining whether a location of the digital multimedia broadcasting receiver is a visible region of a digital multimedia broadcasting in a predetermined region; And setting a channel of the digital multimedia broadcasting receiver according to the determination result.

In the setting of the channel, when the position of the receiver determined in the determining step is not the visible region, the channel of the receiver may be changed to a standby channel.

The setting of the channel may include: determining, by the receiver, whether a service area for receiving a digital multimedia broadcasting service is changed when the location of the receiver determined in the determining step is a visible hearing area; and Accordingly, the method may include setting a pre-stored digital multimedia broadcasting service frequency and channel.

When the service area is changed, the setting of the frequency and the channel may change the frequency and the channel of the receiver to the digital multimedia broadcasting service frequency and the channel in the changed area.

According to the present invention, it is possible to determine whether the current location of the DMB receiver is a visible region and thereby obtain a DMB receiver capable of controlling the operating state of the DMB receiver.

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

1 is a configuration diagram of a DMB receiver according to one embodiment of the present invention.

Referring to FIG. 1, the DMB receiver 100 according to the present embodiment may include the GPS module 110, the comparator 120, and the controller 130 in addition to the components 140, 150, and 160 of the general DMB receiver. It may include.

The general DMB receiver may include an RF tuner 140, a baseband modem 150, and an image / audio processor 160.

The RF tuner 140 may select a signal of a broadcasting station requested by a user from among a plurality of broadcasting stations, apply the intermediate frequency conversion, and analog-digital conversion to the baseband modem 150. The baseband modem 150 may select data corresponding to a broadcast program requested by a user from among a plurality of broadcast programs provided by the selected broadcast station. The video / audio processor 160 may decode and digitally-analog the audio signal and the video signal of the selected broadcast program data and output the decoded audio signal and the digital signal to the display device.

The GPS module 110 may be disposed inside the digital multimedia broadcasting receiver 100 to detect a current position of the receiver. The GPS module 110 may be connected to a GPS antenna to correctly receive the position of the GPS antenna from a satellite.

GPS (Global Positioning System) refers to a system that can accurately know its current position using satellites. That is, the GPS receiver can accurately calculate time and distance from three or more satellites, and accurately calculate location information of the current location by triangulating three different distances. Using the GPS, not only latitude and longitude and altitude location but also accurate time can be obtained along with three-dimensional speed information. Positional accuracy differs between military and civilian. For civilian, the horizontal and vertical error is about 10 ~ 15cm and the speed measurement accuracy is 3cm per second. The satellite is also equipped with three atomic clocks to provide time information with an error of one second in 36,000 years. GPS is currently applied in a wide range of applications, from simple location information to automatic navigation and traffic control of aircraft, ships and automobiles, collision avoidance of oil tankers, precise surveying of large-scale civil engineering works, and mapping. It is developed variously to dragon.

The comparison unit 120 may store data on the visible hearing region of the digital multimedia broadcasting in a preset region, and determine whether the position detected by the GPS module 110 is the visible hearing region.

Data for the visible hearing region stored in the comparator 120 may be stored as an astigmatism region in which it is determined that the signal of the DMB broadcast is difficult to reach in advance or irradiated. That is, a blind spot may be stored as a blind spot due to a tunnel or a large building.

The comparison unit 120 may compare the current receiver position obtained from the GPS module 110 with the location information stored in the data to determine whether it is an astigmatism zone or a visible hearing zone.

The controller 130 may control an operation state of the digital multimedia broadcasting receiver according to the determination result of the comparator.

In the present embodiment, when the position of the current receiver determined by the comparison unit 120 is an astigmatism zone such as a tunnel, the controller 130 may operate the DMB receiver in a standby state. According to the related art, even when the DMB receiver is located in the blind spot, the DMB receiver may continue the channel scan operation and consume unnecessary power. However, according to the present embodiment, if it is determined that the DMB receiver is located in the astigmatism region based on previously stored location information data, the DMB receiver can be operated in a standby state to prevent unnecessary channel scan operation. While the DMB receiver is operating in a standby state, the DMB receiver may transmit previously stored music or video.

According to another embodiment of the present invention, the comparison unit 120 stores frequency information and service channel information for receiving digital multimedia broadcasting in a plurality of preset regions, and the receiver stores the plurality of preset regions. Can be determined in which region.

Due to the characteristics of DMB broadcasting, a broadcast signal transmitted from one transmitter has a limit of reaching only a certain area. Therefore, it is common to form a transmitter for each region, and the transmitter for each region has different frequency band and channel information to prevent frequency crosstalk.

In the present embodiment, frequency information and channel information used in each region are stored in the comparator 120, and in the comparator 120, the current location of the receiver detected by the GPS module 110 is in which region. Can be judged.

In this case, the controller 130 may set a frequency and a channel of the digital multimedia broadcasting receiver to a frequency and a channel serviced in an area where the digital multimedia broadcasting receiver is located.

In the case of the DMB receiver according to the prior art, when moving to a different area from a certain area where a DMB service is provided, the DMB receiver needs to scan the entire frequency band to find a DMB frequency and channel serviced in another area. There is this. However, according to the present embodiment, even when moving from one region to another region, the DMB receiver can be set to a frequency and channel that matches the frequency and channel information serviced at the current location without scanning the frequency band.

2 is a schematic diagram for explaining the operation of the DMB receiver according to the embodiment of the present invention.

Referring to FIG. 2, there are transmitters T ₁ and T ₂ for providing DMB services in different regions A and B, and the transmitters may use different frequencies and channels, respectively. The first transmitter T ₁ uses the first to third frequencies f ₁₁ , f ₁₂ , and f ₁₃ for the first to third channels C ₁₁ , C ₁₂ , and C ₁₃ , respectively, and the second transmitter In T ₂ , the first to third frequencies f ₂₁ , f ₂₂ , and f ₂₃ may be used for the first to third channels C ₂₁ , C ₂₂ , and C ₂₃ , respectively.

First, the case where the DMB receiver is located at the first position R ₁ will be described. The first location may be a tunnel. In advance, the tunnel may be set as a blind spot where the DMB reception signal does not arrive and stored in the comparison unit of the DMB receiver. The GPS module of the DMB receiver detects a current location, obtains information on the detected current location (tunnel) from the data, and the comparator may determine the current location as a blind spot. Accordingly, the controller of the DMB receiver may operate the DMB receiver in a standby state.

The case where the DMB receiver is located at the second position R ₂ is described. The second location may be a visually-affected region affected by the influence of the first transmitter T ₁ serving DMB broadcasting in region A. The second position R ₂ may be set as a visible region where the DMB received signal arrives from the first transmitter T ₁ and may be stored in a comparator of the DMB receiver. The current position may be detected by, and information about the detected current position may be obtained from the data, and the comparison unit may determine the current position as a visible region. Accordingly, the controller of the DMB receiver may set the frequency and channel of the DMB receiver to the frequency and channel serviced by the first transmitter T ₁ .

The case where the DMB receiver moves from the second position R ₂ to the third position R ₃ will be described. The third location R ₃ may be a visible hearing area affected by the influence of the second transmitter T ₂ serving the DMB broadcast in the B region. The third position R ₃ may be set as a visible region where the DMB reception signal arrives from the second transmitter T ₂ and stored in the comparison unit of the DMB receiver. The current position may be detected by, and information about the detected current position may be obtained from the data, and the comparison unit may determine the current position as a visible region. Accordingly, the controller of the DMB receiver may set the frequency and channel of the DMB receiver as the frequency and channel serviced by the second transmitter T ₂ .

3 is a flowchart illustrating a channel setting method of a DMB receiver according to another embodiment of the present invention.

Referring to FIG. 3, the channel setting method of the DMB receiver according to the present embodiment includes determining a location of the DMB receiver (301), determining (302) whether the location of the DMB receiver is in the visible region, and The method may include setting a channel of the DMB receiver according to the determination result.

The step 301 of determining the location of the DMB receiver may be performed by a GPS module embedded in the DMB receiver.

In step 302 of determining whether the location of the DMB receiver is a visible region, data stored in the position of the DMB receiver identified by the GPS module and location information of the visible region where DMB service is received in a predetermined region is received. It can be determined whether the location of the current DMB receiver is in the visible region.

In the present embodiment, the step of setting the channel of the DMB receiver according to the determination result may include changing the channel of the receiver to a standby channel when the position of the receiver determined in the determination step is not a visible region. Can be.

The step of setting a channel of the DMB receiver may include determining whether a service area for receiving a digital multimedia broadcasting service is changed when the location of the receiver determined in the determination step is a visible region (304). And setting the frequency and the channel according to the stored service area information according to the determination.

In step 304, the receiver determines whether the service area for receiving the digital multimedia broadcasting service is changed or not, by determining the current position of the receiver by the GPS module. The comparison unit may store data on DMB service frequencies and channels used in a plurality of preset service areas.

In the present embodiment, the step of setting the frequency and the channel when it is determined that the service area is changed in the step 304 of determining whether the service area has been changed, the DMB service frequency and channel stored in the comparator The receiver may change the frequency and channel of the receiver to the digital multimedia broadcasting service frequency and channel in the changed region by using the data for.

It is intended that the invention not be limited by the foregoing embodiments and the accompanying drawings, but rather by the claims appended hereto. Accordingly, various forms of substitution, modification, and alteration may be made by those skilled in the art without departing from the technical spirit of the present invention described in the claims, which are also within the scope of the present invention. something to do.

1 is a configuration diagram of a DMB receiver according to one embodiment of the present invention.

2 is a schematic diagram for explaining the operation of the DMB receiver according to the embodiment of the present invention.

3 is a flowchart illustrating a channel setting method of a DMB receiver according to another embodiment of the present invention.

<Code Description of Main Parts of Drawing>

110: GPS module 120: comparison unit

130: control unit

Claims (8)

A GPS module for detecting a current position of the digital multimedia broadcasting receiver; A comparison unit which stores data about a visible hearing region of a digital multimedia broadcasting in a preset region, and determines whether the position detected by the GPS module is the visible hearing region based on the data; And A control unit controlling an operation state of the digital multimedia broadcasting receiver according to a determination result of the comparison unit Digital multimedia broadcast receiver comprising a. The method of claim 1, The control unit, And when the position of the digital multimedia broadcasting receiver determined by the comparing unit is not in the visible region, operating the receiver in a standby state. The method of claim 1, The comparison unit, Each frequency information and service channel information for receiving digital multimedia broadcasting in a plurality of preset regions are stored. And determining which area of the plurality of predetermined areas the digital multimedia broadcasting receiver is located in. The method of claim 3, The control unit, And setting a frequency and a channel of the digital multimedia broadcasting receiver to a frequency and a channel serviced in an area where the digital multimedia broadcasting receiver is located. Determining the position of the digital multimedia broadcasting receiver by the GPS module; Determining whether the location of the digital multimedia broadcasting receiver is a visible region of the digital multimedia broadcasting in a preset region; And Setting a channel of the digital multimedia broadcasting receiver according to the determination result Channel setting method of the digital multimedia broadcasting receiver comprising a. The method of claim 5, Setting the channel, And if the location of the receiver determined in the determining step is not in the visible region, changing the channel of the receiver to a standby channel. The method of claim 5, Setting the channel, If the location of the receiver determined in the determination step is a visible region, Determining, by the receiver, whether a service area for receiving a digital multimedia broadcasting service has changed; And Setting a preset digital multimedia broadcasting service frequency and channel according to the determination Channel setting method of the digital multimedia broadcasting receiver comprising a. The method of claim 7, wherein If the service area is changed, Setting the frequency and channel, And changing a frequency and a channel of the receiver to a frequency and a channel of the digital multimedia broadcasting service in a changed region.

Images