KR20080032556A - Broadcasting channel auto switching apparatus in broadcasting system and method thereof - Google Patents

Abstract

An apparatus and a method for automatically selecting a broadcast channel in a broadcasting system are provided to maintain a high receiving sensitivity when moving to a different area or in selecting a frequency according to regional characteristics. RF(Radio Frequency) signals of channels of one or more broadcast stations are started to be received via respective antennas(S310). A receiving sensitivity an RF signal corresponding to a channel of a broadcast station selected by a user among receiving sensitivities of the RF signals of each channel is compared(S320). The first antenna having the highest receiving sensitivity is selected, an RF signal of the channel of the broadcast station selected by the user is received via the selected first antenna, the first receiving sensitivity of the received RF signal is stored, and the received RF signal is processed and outputted(S330). Receiving sensitivities of RF signals corresponding to the channel of the broadcast station selected by the user are searched, the second antenna having the highest receiving sensitivity is selected(S350), and the second receiving sensitivity of the RF signal received via the selected second antenna and the first receiving sensitivity are compared at a pre-set arbitrary time interval(S360). If the second receiving sensitivity is better than the first receiving sensitivity, it is checked whether GPS(Global Positioning System) position information is used(S370). If the GPS position information is used, a channel of a DMB(Digital Multimedia Broadcasting) area broadcast station at an area where a current terrestrial DMB reception antenna is positioned is extracted(S380). The extracted channel and the channel of the broadcast station selected by the user are compared(S390). If the extracted channel and the channel of the broadcast station selected by the user are the same, the frequency of the first antenna is automatically selected as a frequency of the second antenna having the second receiving sensitivity(S400).

Description

BROADCASTING CHANNEL AUTO SWITCHING APPARATUS IN BROADCASTING SYSTEM AND METHOD THEREOF

1 is a block diagram showing a terrestrial DMB receiver using one antenna according to the prior art.

2 is a block diagram illustrating a broadcast channel selection apparatus of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to a first embodiment of the present invention.

3 is a flowchart illustrating a broadcast channel selection method of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to the first embodiment of the present invention.

4 is a block diagram illustrating a broadcast channel selection apparatus of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to a second embodiment of the present invention.

5 is a flowchart illustrating a broadcast channel selection method of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to a second embodiment of the present invention.

6 is a block diagram illustrating an automatic broadcast channel selection apparatus in a terrestrial DMB system for facilitating frequency selection and enhancing reception sensitivity according to a third embodiment of the present invention.

7 is a flowchart illustrating a method for automatically selecting a broadcast channel in a terrestrial DMB system for facilitating frequency selection and enhancing reception sensitivity according to a third embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

310: antenna unit 320: antenna diversity unit

331: First radio frequency processing unit 332: Second radio frequency processing unit

341: first baseband portion 342: second baseband portion

350: data decoder 360

370: output unit

The present invention relates to a device for automatically selecting a broadcast channel and a method thereof, and particularly, to select a broadcast channel of a broadcast system based on position information of a satellite positioning system (GPS) in a broadcast system, In addition, an apparatus for automatically selecting a broadcast channel for receiving a frequency corresponding to a channel of a broadcasting station selected by a user, receiving a frequency corresponding to a channel of the broadcasting station, and selecting one frequency among the received frequencies based on a reception sensitivity. And to a method.

With the development of various multimedia broadcast receiving means, playback means, and display means, there is an increasing demand for users who want to receive various multimedia broadcasts by using the playback means and display means anytime and anywhere. Such various multimedia broadcasts can be viewed using various receiving systems such as television, satellite broadcasting, cable TV, and digital multimedia broadcasting (hereinafter referred to as DMB). In particular, there is a growing interest in DMB pursuing a ubiquitous environment with the advantage of being available anytime and anywhere.

The DMB is a broadcasting service that digitally modulates various multimedia signals such as voice and video and provides them to a fixed, portable, or vehicle receiver. The DMB is based on Digital Audio Broadcasting (DAB), a technology for digital radio, and a multimedia broadcasting concept is added to it to send data information such as video, weather, news, and location. . Through this, it is possible to use a variety of multimedia broadcasting through a personal mobile terminal or a vehicle terminal on the go.

The biggest feature of the DMB is that high-definition video and high-quality audio service can be performed on the go. One of the advantages is that it is possible to watch and listen to broadcasts with clean image quality even in a high speed car or train.

The DMB channel-codes a plurality of audio or video compressed streams and various kinds of data, respectively, multiplexes the channel-coded data into a single bit stream together with system control data, and assembles the multiplexed result. This is called.

A traffic and travel information service (hereinafter referred to as "TPEG") is a service for transmitting traffic and travel information through a digital broadcasting medium such as the DMB. For example, the TPEG service includes a service such as real-time traffic information search, fast path search and road guidance reflecting traffic information, restaurant and travel information, road hazard area and facility information.

Through the TPEG service, a user using the DMB receiver can freely use a desired service anywhere.

1 is a block diagram showing a terrestrial DMB receiver using one antenna according to the prior art.

As shown in FIG. 1, a terrestrial DMB receiver using one antenna according to the prior art includes an antenna unit 10 for receiving an external signal and an RF for demodulating a radio frequency signal input from the antenna unit 10. An audio / video decoder unit 30 for extracting audio data, video data, and other data based on a module unit 20, a signal demodulated by the RF module unit 20, and the audio / video decoder unit 30. And an output unit 40 for displaying audio data, video data, and other data extracted by the user.

The terrestrial DMB receiver generally uses one broadcast reception antenna to receive a radio frequency signal. When one antenna is used as described above, and the terrestrial DMB system moves to another region where a frequency change occurs outside the frequency range of the currently selected broadcast channel, or when a frequency change of the currently selected broadcast channel occurs due to regional characteristics, the one The method of using an antenna may cause a problem in that it is impossible to set a new frequency of a mobile area corresponding to a channel of the same broadcast station while maintaining reception of a radio frequency signal corresponding to a channel of a broadcast station selected by the user.

In addition, the method using the one antenna, when the terrestrial DMB system moves to a different region where the frequency change outside the frequency region of the currently selected broadcasting station channel occurs, or when the frequency change of the currently selected broadcasting channel occurs due to regional characteristics As a result, the reception sensitivity of the broadcasting station channel may become unstable.

In addition, the method using the one antenna, when the terrestrial DMB system moves to another area where the frequency change outside the frequency range of the currently selected broadcasting station channel occurs, or the frequency change of the currently selected broadcasting station channel due to regional characteristics occurs, The problem of unstable judgment accuracy for frequency selection may occur.

An object of the present invention proposes to automatically select a new frequency corresponding to a channel of the same broadcasting station even if a frequency of a broadcasting station channel is changed according to a region, and receives a frequency corresponding to the channel of the broadcasting station selected by the user, Receiving another frequency corresponding to and selecting one of the received frequencies based on the received sensitivity of the received frequencies, thereby selecting a frequency of the currently selected broadcasting station channel when moving to another region or selecting a frequency according to regional characteristics The present invention provides an apparatus and method for automatically selecting a broadcast channel that can facilitate the operation.

Another object of the present invention is to receive a frequency corresponding to a channel of a broadcast station selected by a user, to receive another frequency corresponding to the channel of the broadcast station, and to receive the received frequency based on a reception sensitivity of the received frequencies. By selecting one of the above, there is provided an apparatus and method for automatically selecting a broadcast channel that can maintain a high reception sensitivity when moving to another region or selecting a frequency according to regional characteristics.

Still another object of the present invention is to select a broadcast channel of a broadcast system based on GPS location information, so that when selecting a frequency according to a different area movement or regional characteristics, the broadcast channel automatic to increase the accuracy of the decision for frequency selection It is to provide a selection apparatus and method.

According to an aspect of the present invention, there is provided an apparatus for automatically selecting a broadcast channel, comprising: means for receiving GPS location information; Means for selecting a broadcast channel of a broadcast system based on the GPS location information.

In addition, an apparatus for automatically selecting a broadcast channel according to the present invention for achieving the above objects includes: means for receiving a first frequency corresponding to a channel of a broadcast station selected by a user; Means for receiving a second frequency corresponding to a channel of the broadcast station; Means for selecting the first frequency or the second frequency based on the reception sensitivity of the first frequency and the second frequency.

In addition, an apparatus for automatically selecting a broadcast channel according to the present invention for achieving the above objects includes: an antenna unit for receiving radio frequency signals; An antenna diversity unit for selecting an antenna having the highest reception sensitivity among a plurality of channels corresponding to a broadcasting station selected by a user among antennas included in the antenna unit; A first radio frequency processor configured to process radio frequency signals received through the antenna selected by the antenna diversity unit; A second radio frequency processor for receiving radio frequency signals of channels of at least one broadcasting station through an antenna other than the antenna selected by the antenna diversity unit, and processing the received radio frequency signals; The reception sensitivity of the radio frequency signal received by the first radio frequency processor is compared with the reception sensitivity of the radio frequency signal received by the second radio frequency processor corresponding to the channel of the broadcasting station selected by the user, and based on the comparison result. And selecting a antenna having the highest reception sensitivity and controlling the antenna diversity to receive a radio frequency signal through the selected antenna.

According to an aspect of the present invention, there is provided a method for automatically selecting a broadcast channel, comprising: receiving GPS location information; And selecting a broadcast channel of the broadcast system based on the GPS location information.

In addition, the broadcast channel automatic selection method according to the present invention for achieving the above object comprises the steps of: receiving a first frequency corresponding to the channel of the broadcast station selected by the user; Receiving a second frequency corresponding to a channel of the broadcasting station; And selecting the first frequency or the second frequency based on the reception sensitivity of the first frequency and the second frequency.

In addition, a method for automatically selecting a broadcast channel according to the present invention for achieving the above objects comprises: a first step of selecting a first antenna based on reception sensitivity among at least two or more antennas; Receiving a radio frequency signal through at least one antenna other than the antenna selected in the first step; A third step of selecting a second antenna based on a channel and a reception sensitivity of a broadcasting station selected by a user among the antennas of the second step; Comparing a second reception sensitivity of the radio frequency signal received through the second antenna with a first reception sensitivity of the radio frequency signal received through the first antenna; A fifth step of determining whether to use GPS location information when the second reception sensitivity is better than a predetermined value predetermined by the user than the first reception sensitivity; A sixth step of comparing the extracted channel extracted from the GPS location information with a channel of a broadcasting station selected by the user based on the GPS location information when using the GPS location information; A seventh step of selecting the frequency of the first antenna as the frequency of the second antenna when the extraction channel and the channel of the broadcasting station selected by the user are the same; As a result of the determination in the fifth step, when the GPS location information is not used, an eighth step of selecting the frequency of the first antenna as the frequency of the second antenna.

Hereinafter, a preferred embodiment of an apparatus for automatically selecting a broadcast channel and a method thereof in a broadcast system capable of facilitating frequency selection for a regional broadcast channel and increasing reception sensitivity will be described in detail with reference to FIGS. 2 to 7.

FIG. 2 is a block diagram illustrating a broadcast channel selection apparatus of a broadcast system for facilitating frequency selection and increasing reception sensitivity according to the first embodiment of the present invention. As shown in FIG. The apparatus includes: GPS position information receiving means (110) for receiving GPS position information and a broadcast channel selecting means for selecting a broadcast channel of a broadcasting system based on the GPS position information received at the GPD position information receiving means (110). It consists of 120.

The broadcast channel selecting means 120 is configured to search for a preset broadcast channel frequency corresponding to the current position based on the GPS location information received by the GPS location information receiving means 110.

In addition, the broadcast channel selecting means 120 is configured to select the frequency of the broadcast channel selected by the user as the searched broadcast channel frequency.

The broadcast channel frequency corresponding to the current position and the frequency of the broadcast channel selected by the user have a frequency corresponding to a radio frequency signal of the same broadcast station.

3 is a flowchart illustrating a broadcast channel selection method of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to the first embodiment of the present invention.

First, GPS location information is received (S110).

Then, the broadcast channel of the broadcast system is selected based on the received GPS location information. At this time, the preset broadcast channel frequency corresponding to the current location is searched based on the GPS location information. Thereafter, the frequency of the broadcast channel selected by the user is selected as the searched broadcast channel frequency (S120).

FIG. 4 is a block diagram showing a broadcast channel selection apparatus of a broadcast system for facilitating frequency selection and increasing reception sensitivity according to the second embodiment of the present invention. The apparatus includes a first frequency receiving end 210 for receiving a first frequency corresponding to a channel of a broadcasting station selected by a user, and second frequency receiving means 220 for receiving a second frequency corresponding to the channel of the broadcasting station. And the first frequency or the second frequency based on the first frequency received by the first frequency receiving means 210 and the second frequency received by the second frequency receiving means 220. It consists of a frequency selecting means 230.

The frequency selecting means 230 is configured to compare the reception sensitivity of the first frequency and the second frequency, and select a frequency having the highest reception sensitivity as a result of the comparison.

5 is a flowchart illustrating a broadcast channel selection method of a broadcast system for facilitating frequency selection and enhancing reception sensitivity according to a second embodiment of the present invention.

First, a first frequency corresponding to a channel of a broadcasting station selected by a user is received (S210).

Thereafter, a second frequency corresponding to the channel of the broadcasting station is received (S220).

Thereafter, the first frequency or the second frequency is selected based on the reception sensitivity of the first frequency and the second frequency (S230).

FIG. 6 is a block diagram showing an apparatus for automatically selecting a broadcast channel in a terrestrial DMB system capable of facilitating frequency selection and increasing reception sensitivity according to a third embodiment of the present invention. The automatic selection device includes an antenna unit 310 for receiving radio frequency signals through at least two terrestrial DMB receiving antennas, and an antenna included in the antenna 310 corresponding to a broadcasting station selected by a user. Among the plurality of channels, an antenna diversity unit 320 for selecting a first antenna having the highest reception sensitivity and a first radio frequency for processing radio frequency signals received through a first antenna selected by the antenna diversity unit A processing unit 331, a first baseband unit 341 for classifying signals processed by the first radio frequency processing unit 331, and the first base unit. The data decoder unit 350 demodulates audio data, video data, and additional data among the signals classified by the band unit 341, and at least one antenna other than the first antenna selected by the antenna diversity unit 320. A second radio frequency processor 332 for receiving radio frequency signals of at least one broadcasting station channel and processing the received radio frequency signals, and a second base for classifying the signals processed by the second radio frequency processor 332. A control unit 360 for outputting a demodulated signal from the band unit 342, the data decoder unit 350, or a signal classified by the second baseband unit 342, and an output unit from the control unit 360. And an output unit 370 for displaying a signal.

The antenna unit 310 includes at least two terrestrial DMB receiving antennas, and each antenna is configured to receive radio frequency signals having different signal strengths according to reception sensitivity of the antenna.

The antenna diversity unit 320 receives radio frequency signals of channels of at least one or more broadcasting stations through antennas included in the antenna unit 310, and radio frequency for each channel of the broadcasting station according to each of the received antennas. The signal sensitivity of the signal is stored or transmitted to the controller 360.

In addition, the antenna diversity unit 320 compares the reception sensitivity of the radio frequency signals of a plurality of channels corresponding to the broadcasting station selected by the user among the signal sensitivitys of the radio frequency signals received through the antennas for each antenna. As a result of the comparison, the first antenna having the highest reception sensitivity is selected.

The first radio frequency processor 331 includes an audio / video radio frequency module.

In addition, the first radio frequency processor 331 is configured to remove unnecessary carriers from a radio frequency signal received through the first antenna selected by the antenna diversity unit 320.

In addition, the first radio frequency processor 331 demodulates the received radio frequency signal into an intermediate frequency signal (IF) so that the first baseband unit 341 can use the demodulated signal. It is made to transmit to the input of the first baseband portion 341.

In addition, the first radio frequency processor 331 is configured to store or transmit the received sensitivity of the radio frequency signal received through the first antenna selected by the antenna diversity unit 320 to the controller 360.

The first baseband unit 341 is configured to classify signals including an audio data signal, a video data signal, and an additional data signal from the intermediate frequency signal demodulated by the first radio frequency processor 331.

The second radio frequency processor 332 is configured to include a Transport Protocol Expert Group (TPEG) radio frequency module.

The traffic and travel information service is configured to include at least one or more of real-time traffic information search, fast directions and directions guide reflecting traffic information, restaurants and travel information, road danger zone and facility information.

In addition, the second radio frequency processor 332 may perform radio frequency signals of at least one broadcasting station channel through at least one antenna other than the first antenna selected by the antenna diversity unit 320 at a predetermined reception period. Are made to listen.

In addition, the second radio frequency processor 332 is configured to remove unnecessary carriers from radio frequency signals received through at least one antenna except for the first antenna selected by the antenna diversity unit 320.

In addition, the second radio frequency processing unit 332 demodulates the received radio frequency signal into an intermediate frequency signal so that the second base band unit 342 can use the demodulated signal and the second base band unit ( To the input of 342.

In addition, the second radio frequency processor 332 stores the reception sensitivity of the radio frequency signal received through at least one antenna except for the first antenna selected by the antenna diversity unit 320 or the controller 360. To be delivered).

The controller 360 receives the demodulated signal from the data decoder 350 and outputs the demodulated signal to the output unit 370.

In addition, the controller 360 is configured to receive a signal classified by the second baseband unit 342 and output a control signal.

In addition, the control unit 360 stores the signal sensitivity of the radio frequency signal for each broadcasting station channel according to each antenna received from the antenna diversity unit 320, and stores the radio frequency for each broadcasting station channel according to each stored antenna. Based on the signal sensitivity of the signal, the reception sensitivity for each antenna corresponding to the channel of the broadcasting station selected by the user is compared, and as a result of the comparison, the reception sensitivity of the radio frequency signal corresponding to the channel of the broadcasting station selected by the user is the highest. One antenna is selected.

In addition, the controller 360 is configured to store the reception sensitivity of the first antenna selected by the antenna diversity unit 320 received from the first radio frequency processor 331.

In addition, the controller 360 is configured to store reception sensitivity for each channel of at least one antenna except for the first antenna selected by the antenna diversity unit 320 received from the second radio frequency processor 332. .

The controller 360 may search for signal sensitivity of a radio frequency signal corresponding to a channel of a broadcasting station selected by a user among reception sensitivity of each broadcasting station channel of at least one antenna other than the stored first antenna, Among the signal sensitivity of the retrieved radio frequency signal, the signal sensitivity having the highest signal sensitivity and the reception sensitivity of the radio frequency signal received through the stored first antenna are compared at an arbitrary time interval set by the user.

In addition, when the comparison result, the signal sensitivity of the retrieved radio frequency signal is more than a predetermined value predetermined by the user than the reception sensitivity of the radio frequency signal received through the stored first antenna, The frequency of the first antenna is selected as the frequency of the antenna having the signal sensitivity of the highest radio frequency signal while maintaining the channel of the broadcast station selected by the user.

The output unit 370 may include a liquid crystal display (LCD), a plasma display panel (PDP), an electrochromic display (ECD), and an organic light emitting diode (OLED). Light Emitting Device) may be formed as a display device including at least one.

The apparatus for automatically selecting a broadcast channel includes at least one additional antenna in addition to a first antenna for receiving a radio frequency signal through a channel of a broadcasting station selected by a user, and has a reception sensitivity of the radio frequency signal received through the additional antenna. When the reception sensitivity of the radio frequency signal received through the first antenna is higher than a predetermined value, the frequency of the first antenna is configured to automatically select the frequency of the additional antenna, so that the frequency according to the movement of other regions or regional characteristics When selected, it is possible to facilitate the frequency selection of the channel of the currently selected broadcast station.

The apparatus for automatically selecting a broadcast channel may include at least one additional antenna in addition to a first antenna that receives a radio frequency signal through a channel of a broadcasting station selected by a user, and receives the radio frequency signal received through the additional antenna. When the sensitivity is a predetermined value or more than the reception sensitivity of the radio frequency signal received through the first antenna, by configuring the frequency of the first antenna as the frequency of the additional antenna, it is possible to According to the frequency selection, high reception sensitivity can be maintained.

Hereinafter, a method for automatically selecting a broadcast channel in a terrestrial DMB system that can facilitate frequency selection and increase reception sensitivity according to a third embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7. do.

7 is a flowchart illustrating a method for automatically selecting a broadcast channel in a terrestrial DMB system capable of facilitating frequency selection and increasing reception sensitivity according to a third embodiment of the present invention.

First, at least two terrestrial DMB receiving antennas are used to start receiving radio frequency signals of channels of at least one broadcasting station through respective antennas (S310).

Thereafter, the reception sensitivity of the radio frequency signal corresponding to the channel of the broadcasting station selected by the user is compared among the reception sensitivity of the channel-specific radio frequency signals of the broadcasting stations of the respective antennas (S320).

As a result of the comparison, the first antenna having the highest reception sensitivity of the radio frequency signal corresponding to the channel of the broadcasting station selected by the user is selected, and the radio frequency signal of the channel of the broadcasting station selected by the user through the selected first antenna. Receive and store a first reception sensitivity of the received radio frequency signal. Thereafter, the received radio frequency signal is processed and output (S330).

Thereafter, radio frequency signals of channels of at least one broadcasting station are received through antennas other than the selected first antenna. The radio frequency signals are received by a user at a predetermined period, and when receiving the radio frequency signals, the reception sensitivity of the radio frequency signals for each antenna and for each channel of each broadcasting station is stored (S340).

The reception sensitivity of the radio frequency signal corresponding to the channel of the broadcasting station selected by the user is searched among the reception sensitivity of the radio frequency for each channel of the broadcasting station according to the stored antennas. The second antenna having the highest reception sensitivity is selected among the received sensitivity of the found radio frequency signal (S350), and the second reception sensitivity of the radio frequency signal received through the selected second antenna and the first antenna are received. The received first sensitivity of the radio frequency signal of the channel of the broadcast station selected by the user is compared at a predetermined time interval set by the user (S360).

Thereafter, when the second reception sensitivity is not better than a predetermined value predetermined by the user than the first reception sensitivity, the step S340 is performed.

As a result of the comparison, it is determined whether the GPS position information is used when the second reception sensitivity is more than a predetermined value predetermined by the user than the first reception sensitivity (S370).

As a result of the determination, when the GPS location information is used, the channel of the DMB local broadcasting station in the region where the current terrestrial DMB receiving antenna is located is extracted using the GPS location information (S380).

Thereafter, it is compared whether the channel of the extracted broadcasting station and the channel of the broadcasting station selected by the user are the same (S390).

As a result of the comparison, when the extracted channel of the broadcasting station and the channel of the broadcasting station selected by the user are not the same, step S340 is performed.

As a result of the comparison, when the extracted channel of the broadcasting station and the channel of the broadcasting station selected by the user are the same, the frequency of the first antenna is maintained while maintaining the channel of the broadcasting station currently selected by the user. Branch is automatically selected as the frequency of the second antenna (S400).

In other words, the method for automatically selecting a broadcast channel compares a scan channel obtained by using GPS position information with a channel of a broadcast station previously stored in a terrestrial DMB system, and automatically selects a broadcast channel of the broadcast system based on the comparison result. By configuring so as to, when selecting a frequency according to the movement or other regional characteristics, it is possible to increase the accuracy of the determination for the frequency selection.

As described above in detail, an apparatus and method for automatically selecting a broadcast channel in a digital multimedia broadcasting system according to an embodiment of the present invention include at least one of a first antenna other than a first antenna for receiving a radio frequency signal of a channel of a broadcast station selected by a user. The antenna further includes an antenna for receiving a radio frequency signal, and automatically selecting a frequency of the first antenna as a frequency of an antenna having the highest reception sensitivity of the radio frequency signals of the antennas. When selected, there is an effect that can facilitate the frequency selection of the channel of the currently selected broadcast station.

In addition, the apparatus and method for automatically selecting a broadcast channel in a digital multimedia broadcasting system according to an embodiment of the present invention further include at least one antenna in addition to a first antenna for receiving a radio frequency signal of a channel of a broadcast station selected by a user. Receiving a radio frequency signal and automatically selecting a frequency of the first antenna as a frequency of an antenna having the highest reception sensitivity of the radio frequency signals of the antennas. There is an effect that can be maintained.

In addition, the apparatus and method for automatically selecting a broadcast channel in a digital multimedia broadcasting system according to an embodiment of the present invention compare a scan channel obtained using GPS location information with a channel of a broadcast station previously stored in a terrestrial DMB system. By automatically selecting a broadcast channel of a broadcast system based on the comparison result, it is possible to increase the accuracy of the decision for frequency selection when moving to another area or selecting a frequency according to regional characteristics.

Claims (16)

Receiving GPS location information; And selecting a broadcast channel of the broadcast system based on the GPS location information. The method of claim 1, wherein selecting a broadcast channel of the broadcast system comprises: Searching for a preset broadcast channel frequency corresponding to a current position based on the GPS position information, and selecting a frequency of a broadcast channel selected by a user as the searched broadcast channel frequency; Way. The method of claim 2, wherein the broadcast channel frequency corresponding to the current position and the frequency of the broadcast channel selected by the user are: And a frequency corresponding to a radio frequency signal of the same broadcasting station. Receiving a first frequency corresponding to a channel of a broadcast station selected by a user; Receiving a second frequency corresponding to a channel of the broadcasting station; Selecting the first frequency or the second frequency based on the reception sensitivity of the first frequency and the second frequency. The method of claim 4, wherein the selecting of the first frequency or the second frequency comprises: Comparing the reception sensitivity of the first frequency and the second frequency; And selecting a frequency having a high reception sensitivity as a result of the comparison. Means for receiving GPS location information; And a means for selecting a broadcast channel of a broadcast system based on the GPS position information. The method of claim 6, wherein the means for selecting a broadcast channel of the broadcast system, And searching for a preset broadcast channel frequency corresponding to a current position based on the GPS location information, and selecting a frequency of a broadcast channel selected by a user as the searched broadcast channel frequency. The method of claim 7, wherein the broadcast channel frequency corresponding to the current position and the frequency of the broadcast channel selected by the user, And a frequency corresponding to a radio frequency signal of the same broadcasting station. Means for receiving a first frequency corresponding to a channel of a broadcast station selected by a user; Means for receiving a second frequency corresponding to a channel of the broadcast station; And means for selecting the first frequency or the second frequency based on the reception sensitivity of the first frequency and the second frequency. The apparatus of claim 9, wherein the means for selecting the first frequency or the second frequency comprises: The reception sensitivity of the first frequency and the second frequency is compared, and as a result of the comparison, the broadcast channel selection apparatus of the broadcast system, characterized in that for selecting a frequency having a high reception sensitivity. An antenna unit for receiving radio frequency signals; An antenna diversity unit for selecting an antenna having the highest reception sensitivity among antennas included in the antenna unit among a plurality of channels corresponding to a broadcasting station selected by a user; A first radio frequency processor configured to process radio frequency signals received through the antenna selected by the antenna diversity unit; A second radio frequency processing unit for receiving radio frequency signals of channels of at least one broadcasting station through an antenna other than the antenna selected by the antenna diversity unit, and processing the received radio frequency signals; Comparing the reception sensitivity of a radio frequency signal received by the first radio frequency processor with a reception sensitivity of a radio frequency signal corresponding to a channel of a broadcasting station selected by the user among radio frequency signals received by the second radio frequency processor; And a controller for selecting an antenna having the highest reception sensitivity based on the comparison result and controlling the antenna diversity to receive a radio frequency signal through the selected antenna. . The method of claim 11, A first baseband unit classifying a signal processed by the first radio frequency processing unit; A data decoder for demodulating audio data, video data, and additional data among the signals classified by the first baseband unit; A second baseband unit classifying a signal processed by the second radio frequency processing unit; And an output unit for displaying a signal processed by the controller. Selecting, from at least two antennas, a first antenna based on reception sensitivity; Receiving a radio frequency signal through at least one antenna other than the antenna selected in the first step; A third step of selecting a second antenna based on a channel and a reception sensitivity of a broadcasting station selected by a user among the antennas of the second step; Comparing a second reception sensitivity of the radio frequency signal received through the second antenna with a first reception sensitivity of the radio frequency signal received through the first antenna; A fifth step of determining whether to use GPS location information when the second reception sensitivity is better than a predetermined value predetermined by the user than the first reception sensitivity; A sixth step of comparing the extracted channel extracted from the GPS location information with a channel of a broadcasting station selected by the user based on the GPS location information when using the GPS location information; A seventh step of selecting the frequency of the first antenna as the frequency of the second antenna when the extraction channel and the channel of the broadcasting station selected by the user are the same; And the eighth step of selecting the frequency of the first antenna as the frequency of the second antenna when the GPS position information is not used as a result of the determination in the fifth step. Auto selection method. The method of claim 13, wherein the first step, Receiving radio frequency signals using at least two broadcast receiving antennas; Selecting a first antenna having the highest reception sensitivity of a radio frequency signal of a channel of a broadcast station selected by a user among the at least two broadcast reception antennas; And storing the first reception sensitivity of the radio frequency signal received through the selected first antenna, and demodulating and decoding the received radio frequency signal and outputting the demodulated signal. . The method of claim 13, wherein the second step, Receiving radio frequency signals of channels of at least one or more broadcasting stations at predetermined intervals by a user through at least one antenna other than the first antenna selected in the first step; And storing channel-specific reception sensitivity of radio frequency signals of the received channels of the at least one broadcasting station. The method of claim 13, wherein the third step, Searching for a reception sensitivity of a radio frequency signal corresponding to a channel of a broadcasting station selected by the user, from among radio frequency signals received for each channel of the broadcasting station in the second step; Selecting a second antenna including a second reception sensitivity having a highest reception sensitivity of a radio frequency signal corresponding to a channel of the broadcasting station selected by the user as a result of the search. Auto selection method.

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