KR101813547B1 - Audio apparatus, vehicle having the same and method thereof - Google Patents

Abstract

The present invention provides a broadcast receiving apparatus, comprising: a first receiver for receiving a first broadcast signal for broadcasting a program selected by a user; A second receiver for receiving a plurality of second broadcast signals; A signal processor for calculating the signal strength and the signal-to-noise ratio of the first broadcast signal and comparing the first broadcast signal and the plurality of second broadcast signals to calculate the similarity for the second broadcast signal; And if the signal intensity of the first broadcast signal is equal to or lower than the reference intensity and the signal-to-noise ratio is equal to or lower than the reference ratio, the second broadcast signal for broadcasting the program based on the similarity for the second broadcast signal, And a control unit for changing the reception frequency of the first receiving unit to the confirmed frequency.
The present invention receives location information of a vehicle from a GPS receiver when entering a frequency region beyond a frequency band of a broadcasting station when listening to a radio through audio and automatically searches the frequency of a program currently being listened based on the location information It is possible to continue to listen to the program of the same broadcasting station without the need for a user to operate it.

Description

[0001] The present invention relates to an audio apparatus, a vehicle having the same,

The present invention relates to an audio apparatus for listening to radio, a vehicle having the same, and a method thereof.

A vehicle is a machine that drives a wheel for the purpose of transporting a person or cargo, and moves on the road.

In addition to basic driving functions, these vehicles perform additional functions for user convenience such as audio function, video function, navigation function, air conditioning function, seat heating function and communication with external terminal.

The audio apparatus performing the audio function includes a radio for listening to various information such as traffic information and news transmitted from the broadcasting station, music and the like, and a cassette tape recorder or a CD player for reproducing a cassette tape or a CD.

The radio was designed to be operated by the driver while driving.

For example, buttons for operating the radio, such as frequency tuning, volume control, power on / off, etc., are provided in an easy-to-operate push button manner and are mounted at a distance that facilitates the driver's hand.

Nevertheless, since the act of pushing the button of the radio during the driving of the vehicle causes the driver's hand to move away from the steering wheel, it hinders safe driving and causes traffic accidents.

Also, if the user enters a different frequency band after leaving the frequency band of a specific broadcasting station, the radio frequency for listening to the same broadcasting is varied, which makes it difficult to hear the broadcasting smoothly. Therefore, the driver had to select the frequency again to listen to the broadcast of the station.

In other words, if the station is changed due to the different radio frequency of each region, and the broadcast noise becomes worse, the driver must operate several buttons while driving to search the radio frequency of the corresponding region.

In this case, there is a problem that the driver's attention is dispersed and the possibility of leading to a car accident is increased.

An aspect of the present invention provides an audio apparatus for comparing broadcast signals received by two receivers to determine whether the broadcast program is the same program and changing the frequency of the first receiver to the frequency of the second receiver when the program is determined to be the same program.

Another aspect provides an audio apparatus for changing a frequency of a first receiving unit to a frequency of a second receiving unit based on position information, a vehicle having the same, and a method thereof.

According to one aspect of the present invention, there is provided an audio apparatus, comprising: a first receiver for receiving a first broadcast signal for broadcasting a program selected by a user; A second receiver for receiving at least one second broadcast signal; A signal processor for comparing the first broadcast signal with at least one second broadcast signal; And a controller for checking a second broadcast signal identical to the first broadcast signal, checking the frequency of the second broadcast signal, and changing the reception frequency of the first receiver to an identified frequency.

The signal processing unit of the audio apparatus according to one aspect may include calculating a signal strength and a signal-to-noise ratio of the first broadcast signal, and the control unit may be configured such that the signal strength of the first broadcast signal is equal to or lower than the reference strength, And checking the second broadcast signal that is the same as the first broadcast signal if the large-noise ratio is less than the reference rate.

The signal processing unit of the audio apparatus according to an aspect may further include calculating a degree of similarity for each of the second broadcasting signals by comparing the first broadcasting signal and the plurality of second broadcasting signals, And confirming a second broadcast signal identical to the first broadcast signal based on each similarity of the first broadcast signal.

The audio device according to one aspect further includes a communication unit for performing communication with an external terminal and receiving position information from an external terminal, and the control unit may determine the current position based on the positional information and transmit the first broadcast signal Confirming the broadcaster and confirming the frequency of the second broadcast signal based on the confirmed current location and the broadcaster.

The control unit of the audio apparatus according to one aspect checks whether the current position is a predetermined overlapping area based on the positional information. If it is determined that the current position is a predetermined overlapping area, And controlling the receiver.

The audio device according to one aspect further includes a GPS receiver. The controller confirms the current position based on the position information of the GPS receiver, identifies the broadcasting station transmitting the first broadcasting signal, and based on the confirmed current position and the broadcasting station And checking the frequency of the second broadcast signal.

The audio device according to one aspect further includes a communication unit for performing communication with the GPS receiving unit. The control unit confirms the current position based on the position information of the GPS receiving unit, confirms the broadcasting station transmitting the first broadcasting signal, And determining the frequency of the second broadcast signal based on the location and the broadcaster.

The audio apparatus according to one aspect further includes an input unit for receiving an automatic channel change command.

The signal processing unit of the audio apparatus according to one aspect includes a first memory for storing a first broadcast signal for a predetermined time and a second memory for storing a second broadcast signal for a predetermined time.

A first receiving unit of the audio apparatus according to an aspect of the present invention includes a first tuner, a first amplifying unit amplifying a first broadcasting signal received by the first tuner, and a second amplifying unit separating a signal of an audio frequency range from the amplified first broadcasting signal A second demodulator for amplifying a second broadcast signal received by the second tuner, and a second demodulator for demodulating the amplified second broadcast signal to a signal in an audible frequency range And a second detection section for separating the first detection section and the second detection section.

The audio apparatus according to one aspect further includes a third amplifying unit for amplifying a signal in an audible frequency range separated by the first detecting unit.

The controller of the audio apparatus according to an aspect further includes activating the second receiver if the intensity of the signal of the first broadcast signal is below the reference intensity and the signal-to-noise ratio is below the reference ratio.

The control unit of the audio apparatus according to an aspect may determine whether a predetermined time has elapsed if at least one of the first broadcast signal and the at least one second broadcast signal is an advertisement broadcast signal, Signal and the at least one second broadcast signal.

According to another aspect of the present invention, there is provided an audio apparatus, comprising: a first receiver for receiving a first broadcast signal for broadcasting a program selected by a user; A second receiver for receiving at least one second broadcast signal; And a control unit for controlling the second receiving unit to activate the second broadcasting unit when it is determined that the area has been changed, and for activating the second broadcasting unit for transmitting the program among the plurality of second broadcasting signals received by the second receiving unit, And a control unit for confirming the frequency and changing the frequency of the first receiving unit to the identified frequency.

The audio apparatus according to another aspect further includes a communication unit for performing communication with an external terminal and receiving location information from an external terminal.

The control unit of the audio apparatus according to another aspect checks whether the current location is a predetermined overlapping area based on the location information. If it is determined that the current location is a predetermined overlapping area, And controlling the receiver.

The audio apparatus according to another aspect may further include a signal processing unit for comparing the first broadcast signal and the plurality of second broadcast signals to calculate a similarity degree for each of the second broadcast signals, And checking the frequency of the second broadcast signal for transmitting the program.

According to another aspect, in a vehicle including a vehicle terminal and an audio apparatus, the audio apparatus includes: a first receiver for receiving a first broadcast signal of a first region for broadcasting a program selected by a user; A second receiver for receiving a second broadcast signal of a first region and a second region; A signal processor for comparing the first broadcast signal and the second broadcast signal; And a control unit for checking a second broadcast signal identical to the first broadcast signal and checking the frequency of the second broadcast signal and changing the reception frequency of the first receiver to an identified frequency.

According to another aspect of the present invention, an audio apparatus includes a signal processor for calculating a signal strength of a first broadcast signal and a signal-to-noise ratio, and comparing a first broadcast signal and a second broadcast signal to calculate a similarity , The control unit confirms broadcasting station information for transmitting the first broadcasting signal when the intensity of the first broadcasting signal is equal to or lower than the reference intensity and the signal-to-noise ratio is equal to or lower than the reference ratio, and based on the position information and broadcasting station information transmitted from the vehicle- And changing the frequency of the first receiving unit to the identified frequency if the similarity detected at the activation of the second receiving unit exceeds the reference similarity.

The vehicle terminal of the vehicle according to another aspect includes a GPS receiver and a communication unit for transmitting position information.

According to another aspect of the present invention, the control unit of the audio apparatus of the vehicle confirms whether the current position is a predetermined overlapping area based on the positional information. If it is determined that the current position is the predetermined overlapped area, And a second receiving unit to sequentially receive the first receiving unit and the second receiving unit.

According to another aspect of the present invention, there is provided an audio apparatus of a vehicle, further comprising a storage unit for storing frequencies of respective broadcasters of a plurality of regions.

A vehicle according to another aspect includes a GPS receiver; A first receiver for receiving a first broadcast signal of a first region for broadcasting a program selected by a user; A second receiver for receiving a second broadcast signal of a first region and a second region; A signal processing unit for calculating a signal intensity of the first broadcast signal and a signal-to-noise ratio and for calculating a similarity by comparing the first broadcast signal and the second broadcast signal; And if the intensity of the signal of the first broadcasting signal is equal to or lower than the reference intensity and the signal-to-noise ratio is equal to or lower than the reference ratio, the control unit confirms broadcasting station information for transmitting the first broadcasting signal, And a control unit for checking the frequency of the second broadcast signal of the domain and changing the frequency of the first receiver to the identified frequency when the similarity determined at the activation of the second receiver exceeds the reference similarity.

According to another aspect of the present invention, there is provided a control method for an audio apparatus provided in a vehicle, the method comprising: receiving a first broadcast signal for broadcasting a program selected by a user in a first region; And the second receiver is activated so as to receive the confirmed frequency, and the first broadcast is broadcast, and the first broadcast is broadcast, And the second broadcasting signal received by the second receiving unit to compute the similarity, and if the calculated similarity exceeds the reference similarity, the frequency of the first receiving unit is changed to the confirmed frequency so that the program is broadcast.

According to another aspect of the present invention, a method of controlling a vehicle includes calculating a signal strength of a first broadcast signal and a signal-to-noise ratio, calculating a signal strength of a first broadcast signal to be equal to or lower than a reference strength, , It is further possible to check the broadcasting station and the current location information for transmitting the first broadcasting signal.

According to another aspect of the present invention, there is provided a method of controlling a vehicle, the method comprising: receiving a program based on a first broadcast signal received by a first receiver if the intensity of the first broadcast signal exceeds a reference intensity or a signal- It further includes broadcasting.

According to another aspect of the present invention, the method further includes activating the second receiver to select another frequency to be transmitted from the broadcaster and receive another frequency if the calculated similarity is less than the reference similarity.

The present invention receives location information of a vehicle from a GPS receiver when a user enters a frequency region beyond a frequency region of a broadcasting station through an audio device and automatically searches for the frequency of a program currently being listened based on the location information It is possible to continue to listen to the program of the same broadcasting station without the need for a user to operate it.

In addition, since the present invention allows a user to continuously listen to a program of the same broadcasting station while moving in a frequency region without using a hand, the present invention can provide convenience of driving and can concentrate on driving only, .

Further, the present invention can listen to the radio with optimal reception sensitivity depending on the area.

As described above, the present invention can improve the quality and merchantability of a vehicle having a radio function, further increase the satisfaction of the user, improve the convenience of the user and the safety of the vehicle, and secure the competitiveness of the product.

1 is an exemplary view of a vehicle according to an embodiment;
2 is an internal view of a vehicle according to an embodiment.
3 is a control configuration diagram of a vehicle according to an embodiment.
4 is a configuration diagram of an audio device and a terminal provided in a vehicle according to an embodiment.
5 is a detailed configuration diagram of an audio apparatus provided in a vehicle according to an embodiment.
6A and 6B are flowcharts of control of an audio apparatus provided in a vehicle according to an embodiment.
7 is a diagram illustrating an example of movement of a vehicle in a region according to an embodiment.
FIG. 8 is a diagram illustrating a frequency table for each area stored in an audio device provided in a vehicle according to an embodiment.
9 is a control configuration diagram of an audio apparatus provided in a vehicle according to another embodiment.
10 is a control configuration diagram of an audio apparatus provided in a vehicle according to still another embodiment.

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

FIG. 1 is an external view of a vehicle according to an embodiment, and FIG. 2 is an internal view of a vehicle according to an embodiment.

The vehicle (1) drives the wheels to travel on the road for the purpose of transporting people or cargo. This vehicle 1 is capable of wired / wireless communication with the user terminal 2.

The vehicle 1 includes a body having a built-in and an exterior, and a chassis provided with a mechanical device necessary for traveling to a remaining portion excluding the vehicle body.

1, the exterior 110 of the vehicle body includes a front panel 111, a bonnet 112, a roof panel 113, a rear panel 114, a trunk 115, front and rear right and left doors 116, And a window glass 117 provided on the left and right doors 116 so as to be openable and closable.

The exterior of the vehicle body further includes a filler 118 provided at a boundary between the window glass of the front panel, the bonnet, the roof panel, the rear panel, the trunk, and the front and rear doors.

The window glass 117 includes a side window glass provided on front and rear left and right doors, a quarter window glass installed between the pillar and the filler but not capable of being opened and closed, a rear window glass provided on the rear side and a front window glass provided on the front side .

The exterior of the vehicle body further includes a side mirror 119 that provides the driver with a field of view behind the vehicle 1. [

2, the interior body 120 of the vehicle body includes a seat 121 on which an occupant sits, a dashboard 122, and a tachometer 120. The tachometer 120 includes a tachometer, a speedometer, a coolant thermometer, a fuel meter, (Ie, cluster 123) in which the warning lamps, the warning light, the warning light, the warning light, the odometer, the odometer, the automatic shift selector lever indicator, the door open warning lamp, the engine oil warning lamp, And a center fascia 125 in which a ventilation hole and a throttle plate of the air conditioner are disposed and an audio device is disposed.

The seat 121 includes a driver's seat 121a on which the driver sits, a passenger seat 121b on which the passenger sits, and a rear seat located in the rear of the vehicle.

The cluster 123 may be implemented in a digital manner. That is, the digital cluster 123 displays the vehicle information and the running information as images.

The center fascia 125 has a head unit 126 for controlling the audio device, the air conditioner, and the heater, which is a portion of the dashboard 122 located between the driver's seat 121a and the passenger's seat 121b.

The center fascia 125 may be provided with a fan, a cigar jack, or the like.

In addition, the center fascia 125 may be provided with a multi terminal 127 to which a user's terminal (not shown) is wired.

That is, the multi terminal 127 enables wired communication between the head unit 126 or the vehicle terminal 140 and the user's terminal (not shown).

The multi terminal 127 includes a USB port, an AUX terminal, and may further include an SD slot. The multi terminal 127 may be disposed adjacent to the head unit 126 and may be disposed adjacent to the vehicle terminal 140 , The vehicle terminal 140 and an external device through a connector or a cable.

The external device includes a storage device, a user terminal, an MP3 player, and the like, and the storage device includes a card-type memory and an external hard disk.

The user terminal is a mobile communication terminal, and includes a smart phone, a notebook, a tablet, and the like.

The vehicle 1 may further include an input unit 128 for receiving operation commands of various functions and may further include a display unit 129 for displaying operation information.

The input unit 128 may be provided on the head unit 126 and the center pacea 125 and may include at least one physical button such as an operation on-off button of various functions, a button for changing setting values of various functions do.

The input unit 128 can transmit an operation signal of the button to the control unit in the head unit 126 or the vehicle terminal 140.

That is, the input unit 128 receives the operation ON / OFF command of the vehicle terminal 140, selects at least one function among the plurality of functions, and transmits the selected function to the vehicle terminal 140.

For example, when the navigation function is selected, the input unit 128 receives destination information and transmits the input destination information to the vehicle terminal 140. When the DMB function is selected, the input unit 128 receives the broadcast channel and volume information, And transmits volume information to the vehicle terminal 140. When the radio function is selected, the radio channel and the radio volume information are input and the input radio channel and volume information are transmitted to the vehicle terminal 140 or the display unit 129. [

The input unit 128 may include a touch panel integrally provided on a display unit of the vehicle terminal. The input unit 128 may be activated and displayed in the form of a button on the display unit of the vehicle terminal 140, and receives the location information of the displayed button.

The input unit 128 may further include a jog dial (not shown) or a touch pad for inputting a movement command and a selection command of the cursor displayed on the display unit of the vehicle terminal 140.

The input unit 128 transmits an operation signal of the jog dial or a touch signal touched on the touch pad to the vehicle terminal 140.

Here, the jog dial or the touch pad may be provided in a center fascia or the like.

The input unit 128 may receive an automatic channel change command when performing a radio function.

The display unit 129 displays operation information of the head unit 126 and displays input information input to the input unit 128. [

For example, the display unit 129 displays radio channel information and radio volume information input by the user when the radio function is selected.

The display unit 129 may display the input information of the automatic channel change command and the automatic channel change performing information when the radio function is performed.

The vehicle 1 may further include an audio device for performing an audio function.

This audio apparatus may be provided in the head unit 126 of the vehicle.

The on-vehicle terminal 140 may be disposed on a dashboard.

The vehicle terminal 140 performs an audio function, a video function, a navigation function, a DMB function, a radio function, and a GPS reception function.

The vehicle frame includes a power generating device, a power transmission device, a traveling device, a steering device, a braking device, a suspension device, a transmission device, a fuel device, and front and rear left and right wheels.

In addition, the vehicle may be provided with various safety devices for the safety of the driver and the occupant.

Examples of the stabilizing device of the vehicle include an airbag control device for the purpose of safety of a passenger such as a driver in the event of a vehicle collision, and a vehicle stability control device (ESC: Electronic Stability Control) There are safety devices.

In addition, the vehicle 1 may include a proximity sensor for detecting rear or side obstacles and other vehicles, a rain sensor for detecting rainfall and precipitation, a wheel speed sensor for sensing the speed of the front and rear left and right wheels, an acceleration sensor , And an angular velocity sensor for detecting the steering angle of the vehicle.

This vehicle 1 is an electronic control unit (ECU) that controls the driving of a power generating device, a power transmitting device, a traveling device, a steering device, a braking device, a suspension device, a transmission, a fuel device, various safety devices, : Electronic Control Unit).

The vehicle 1 may further include an electronic device such as a hands-free device, a Bluetooth device, a rear camera, a charging device for a user terminal, and a high-pass device installed for the convenience of the driver.

The vehicle 1 may further include a start button for inputting an operation command to the start motor (not shown).

That is, the vehicle 1 operates a starter motor (not shown) when the starter button is turned on and drives an engine (not shown) that is a power generator through the operation of the starter motor.

The vehicle 1 further includes a battery (not shown) electrically connected to a terminal, an audio device, an interior, etc., a starter motor, and other electronic devices to supply driving power.

Such a battery performs charging using power from the self-generator or the engine while driving.

The vehicle 1 may further include a communication device for communication between various electronic devices therein and for communication with a user terminal, which is an external terminal.

The communication device may include a CAN communication module, a Wi-Fi communication module, a USB communication module, and a Bluetooth communication module.

The communication device may further include a broadcasting communication module such as TPEG, SXM, and RDS such as DMB.

The control configuration of such a vehicle will be described with reference to Fig.

3 is a control configuration of a vehicle according to an embodiment. The control unit 150 includes an input unit 128, a display unit 129, an audio device 130, a terminal 140, and a control unit 150.

The input unit 128 receives at least one operation command from the user and transmits the inputted at least one operation command to the controller 150.

The input unit 128 receives a radio mode ON / OFF command and receives a radio channel, a radio volume, and an automatic channel change command during the radio mode.

The input unit 128 may also receive music playback, stop, and end commands during the audio mode.

The input unit 128 may receive the destination information when performing the navigation mode.

The display unit 129 displays the mode information being executed.

For example, the display unit 129 may display a running mode such as a radio mode, an audio mode, a talking mode, a DMB mode, and a navigation mode.

The display unit 129 displays the radio channel selected by the user in the radio mode, displays the radio volume, and displays whether or not the automatic channel change is selected.

The display unit 129 may display the tone generator information selected by the user in the audio mode and display the audio volume.

The display unit 129 may be a flat panel display panel such as an LCD, a PDP, or an OLED provided in a vehicle, or may be a display unit of a vehicle terminal.

The audio device 130 may include a radio function for receiving and outputting a broadcast signal transmitted from a radio station, and may include an audio function for reproducing a sound source stored on a CD or a storage medium.

The terminal 140 may perform a navigation function based on the GPS information, and may perform a DMB function to receive a broadcast signal transmitted from a broadcast station and output a broadcast image and a broadcast sound.

The control unit 150 transmits the input information input to the input unit 128 to the audio device 130 and the terminal 140.

The control unit 150 may control the operation of the audio device 130 and the terminal 140 based on the input information input to the input unit 128. [

The control unit 150 may control the output of the input information input to the input unit 128 and the operation information of the audio device 130 and the terminal 140. [

The vehicle 1 may also include a GPS receiver. In this case, the control unit 150 may transmit the position information of the GPS receiving unit to the audio device 130.

The controller 150 may be an electronic control unit (ECU) provided in the vehicle.

Fig. 4 is a block diagram of an audio apparatus and a terminal provided in a vehicle according to an embodiment of the present invention, with reference to Fig.

In the present embodiment, 'first' is written in a configuration section provided in the audio apparatus 130 and 'second' is written in a configuration section provided in the terminal 140 in order to distinguish between the configuration section of the audio apparatus and the configuration section of the terminal .

The audio device 130 includes a first receiving unit 131, a second receiving unit 132, a first antenna 133, a third amplifying unit 134, a first signal processing unit 135, a first controlling unit 136, A tuner control unit 137, a first storage unit 138, and a first communication unit 139.

The first receiving unit 131 receives the first broadcasting signal in the first region corresponding to the point of time when the vehicle is turned on or the point in time when the audio apparatus is powered on.

The first receiving unit 131 receives the first broadcasting signal having a frequency corresponding to the command of the first control unit 136.

The second receiving unit 132 receives the second broadcast signal in a region other than the first region, and is activated or deactivated based on a command of the first control unit 136, and receives the second broadcast signal upon activation.

The second receiving unit 132 receives the second broadcasting signal having a frequency corresponding to the command of the first controlling unit 136. [

The antenna 133 receives the broadcasting signals transmitted from the respective broadcasting stations of the plurality of broadcasting stations and transmits the received broadcasting signals to the first receiving unit 131 and the second receiving unit 132.

At this time, the first receiver 131 receives the first broadcast signal according to the command of the first controller, and the second receiver 132 selectively receives the second broadcast signal according to the command of the first controller.

The first receiver 131 includes a first tuner 131a receiving a frequency signal corresponding to a channel selected by the user (i.e., a program) (i.e., a first broadcast signal) A first amplifying unit 131b for amplifying a frequency signal and a first detecting unit 131c for demodulating the amplified frequency signal and outputting a signal in an audible frequency range.

The second receiver 132 includes a second tuner 132a for receiving a frequency signal (i.e., a second broadcast signal) of a region different from the first region, a second tuner 132b for amplifying the frequency signal received by the second tuner 132a, 2 amplifying unit 132b and a second detecting unit 132c for demodulating the amplified frequency signal and outputting a signal in an audible frequency range.

The third amplifying unit 134 is connected to the first detecting unit 131c, amplifies the signal output from the first detecting unit 131c, and transmits the amplified signal to the speaker.

The first signal processor 135 processes the demodulated signal demodulated by the first receiver and the demodulated signal demodulated by the second receiver, and transmits the signal processing information to the first controller 136.

6, the first signal processing unit 135 includes a first AD conversion unit 135a, a second AD conversion unit 135b, a signal intensity calculation unit 135c, a signal SNR calculation unit 135d, a first memory 135e, a second memory 135f, a signal comparison operation section 135g, and an interface section 135h.

The first A / D converter 135a samples the demodulated signal, which is an analog signal connected to the first receiver 131 and output from the first receiver 131, as a digital signal.

The second AD converter 135b samples the demodulated signal, which is an analog signal that is coupled to the second receiver 132 and output from the second receiver 132, as a digital signal.

The signal strength calculator 135c is connected to the first AD converter 135a and calculates the signal strength of the digital signal sampled by the first AD converter 135a.

The signal SNR calculating unit 135d calculates the signal-to-noise ratio of the digital signal sampled by the first A / D converting unit 135a, which is connected to the first A / D converting unit 135a.

The first memory 135e is connected to the first AD converter 135a and stores the digital signal sampled by the first AD converter 135a.

The second memory 135f is connected to the second AD converter 135b and stores the digital signal sampled by the second AD converter 135b.

The signal comparison operation unit 135g compares the digital signal stored in the first memory 135e with the digital signal stored in the second memory 135f and calculates the similarity based on the correlation between the two digital signals.

That is, the signal comparison operation unit 135g compares two digital signals to check whether the first and second broadcast signals are the same broadcast signal.

The interface unit 135h is connected to the first control unit 136 and transmits the calculated signal strength, the calculated signal-to-noise ratio, and the calculated similarity to the first control unit 136. [

The first control unit 136 confirms the channel selected by the user, that is, the channel inputted to the input unit 128, confirms the program corresponding to the confirmed channel, confirms the frequency of the confirmed program, And transmits the information of the confirmed frequency to the tuner control unit 137 to receive the first broadcast signal.

The first controller 136 receives the first broadcast signal through the first receiver and confirms reception sensitivity of the first broadcast signal and determines whether to change the frequency based on the received reception sensitivity.

That is, the first controller 136 activates the second receiver 132 when the signal strength calculated by the signal processor is less than or equal to a predetermined reference strength, and the calculated signal-to-noise ratio is less than a preset reference ratio.

The first control unit 136 confirms the location information, identifies the area where the vehicle is located based on the confirmed location information, identifies the broadcasting station transmitting the broadcasting signal of the program being broadcast in the confirmed area, At least one frequency is identified.

The first controller 136 controls the second receiver to sequentially receive second broadcast signals having a plurality of frequencies if the frequencies are a plurality of identified frequencies.

The first controller 136 controls the second receiver to receive a second broadcast signal having a certain frequency.

That is, the first control unit 136 transmits the information of the confirmed frequency to the tuner control unit 137 to receive the second broadcast signal having the identified frequency.

The first controller 136 controls the second memory to store the digital signal of the second broadcast signal received by the second receiver and simultaneously stores the digital signal of the first broadcast signal received by the first receiver, .

The first controller 136 compares the similarity of the digital signal of the first broadcasting signal with the digital signal of the second broadcasting signal and the preset reference similarity, and when the calculated similarity exceeds the reference similarity, And changes the frequency of the broadcast signal to the frequency of the second broadcast signal.

That is, the first control unit 136 transmits information of the changed frequency to the tuner control unit 139.

The first controller 136 controls the second receiver to receive the second broadcast signal having the other frequency to the second receiver if the calculated similarity is less than the reference similarity.

That is, the first controller 136 transmits the information of the other frequency to the tuner controller 137 so that the second receiver receives the second broadcast signal having the other frequency.

If it is determined that the region where the vehicle is located overlaps with at least two regions, the first control unit 136 identifies the broadcasting station transmitting the broadcast signal of the currently broadcast program for each zone, and transmits at least one Check frequency by region.

The first controller 136 controls the second receiver to sequentially receive the second broadcasting signal of the corresponding broadcasting station for each area.

The first control unit 136 determines whether there are a plurality of frequencies identified for each zone. If a zone having a plurality of frequencies exists, the first control unit 136 controls the second receiving unit to sequentially receive second broadcast signals having a plurality of frequencies in the corresponding zone .

The first control unit 136 compares the signal strengths of a plurality of broadcast signals when a plurality of broadcast signals of a program currently being broadcast are received and a broadcast signal transmitted from a plurality of regions is received, It is also possible to change the frequency received by the first receiver to the frequency of the selected broadcast signal.

When the location information is received, the first control unit 136 determines whether or not the area is changed. If it is determined that the area is changed, the first control unit 136 activates the second receiving unit. If the second receiving unit receives the broadcast program, It is also possible to check the frequency of the second broadcast signal for transmission and change the frequency of the first receiver to the identified frequency.

The tuner control unit 137 controls the frequencies to be received by the first and second receiving units based on the frequency information transmitted from the first control unit 136. [

The first storage unit 138 stores a frequency table for each of a plurality of broadcasters.

The first storage unit 138 stores a preset reference intensity, a preset reference ratio, and a preset reference similarity.

The first storage unit 138 may store the area information corresponding to the location information, and may store the overlapped area in which the areas are overlapped.

The first communication unit 139 transmits the position information transmitted from the terminal 140 to the first controller 136.

The first communication unit 139 may transmit a request signal of the position information to the terminal 140 based on the command of the first control unit 136. [

The speaker converts the signal transmitted from the third amplifying unit 134 into the vibration of the diaphragm, generates a small-sized wave in the air, and copies the sound wave.

More specifically, the speaker outputs the sound of the radio to the sound.

The speaker outputs the audio signal of the navigation information as a sound.

In the navigation function, the speaker can output audio signals of path and running information as sounds, output audio signals of contents or external broadcasts as sounds, or output audio signals such as music and radio selected by the user as sounds .

The terminal 140 includes a second antenna 141, a position receiving unit 142, a second signal processing unit 143, a second control unit 144, a second storing unit 145, a display unit 146, a sound unit 147 And a second communication unit 148. [

The position receiving unit 141 includes a GPS (Global Positioning System) receiving unit 142 and a second signal processing unit 143 for processing the GPS signals acquired by the GPS receiving unit 142. [

The GPS (Global Positioning System) receiving unit 142 includes an antenna for receiving signals of a plurality of GPS satellites.

The second signal processing unit 143 includes software for obtaining the current position using the distance and time information corresponding to the position signals of the plurality of GPS satellites and an output unit for outputting the acquired position information of the vehicle.

When the destination information is input when the navigation function is selected, the second controller 144 searches for a route based on the input destination information and the location information, controls the output of the search route, do.

That is, the second control unit 144 controls the output of the video information and the sound information of the navigation information.

The second controller 144 transmits the position information to the audio device 130 when the audio function of the audio device 130 is performed.

In addition, the second controller 144 can transmit position information when the request signal is received from the audio device 130, and can transmit position information to the audio device 130 periodically or in real time.

The second storage unit 145 stores map information and destination information input by the user.

The second storage unit 145 may further store music information, content information, and the like.

The display unit 146 displays the video information of the navigation information.

The display unit 146 displays a guidance message and an icon having command information.

In addition, the display unit 146 may display a Korean / English character button, a number button, a special character button, and the like for inputting a destination, and may display a route guide button for a route guide command.

The display unit 146 may display information related to a telephone call, display an image of content, display information related to music playback, or display an external broadcast signal as an image.

Also, the display unit 146 can display the provided information of the position information.

The display unit 146 may be a flat panel display panel such as an LCD, a PDP, or an OLED provided in a vehicle.

The sound unit 147 outputs sound information of navigation information, amplifies the sound signal in the received sound information by a predetermined magnitude, and outputs the amplified sound signal.

In other words, the sound unit 147 may output sound and route information in the navigation function, output sound information of content or external broadcast, or output sound information such as music and radio selected by the user.

The second communication unit 148 transmits the position information to the audio device 130 based on the command of the second control unit 144. [

The second communication unit 148 may transmit the request command transmitted from the audio device 130 to the second control unit 144 and may transmit the location information to the audio device 130 at this time.

6A and 6B are flowcharts of control of an audio apparatus provided in a vehicle according to an embodiment. This will be described with reference to FIGS. 7 and 8. FIG.

The audio device receives a program 151 from the user.

The selection of a program here includes selecting one of the channels through the input unit 128.

When the program is selected, the audio device confirms the frequency of the selected program and transmits the information of the confirmed frequency to the tuner control unit 137. [

At this time, the tuner control unit 137 uses the first receiving unit to receive the first broadcast signal having the identified frequency.

That is, the audio device receives (512) the frequency signal of the first broadcast signal using the first receiver.

The audio apparatus receives the frequency signal of the first broadcast signal, amplifies the high frequency signal among the frequency signals of the received first broadcast signal, demodulates the amplified signal to generate a signal in an audible frequency range, Amplifies the low frequency signal, and outputs the amplified low frequency signal through the speaker so as to broadcast the program (153).

The audio device confirms the reception sensitivity of the first broadcast signal while broadcasting the program and determines whether to change the frequency based on the confirmed reception sensitivity.

More specifically, the audio device samples the first broadcast signal as a digital signal, computes the signal strength of the sampled signal, and calculates a signal-to-noise ratio of the sampled signal.

If it is determined that the calculated signal strength is less than or equal to the reference strength, the audio device determines whether the calculated signal strength is less than or equal to the reference strength. If the calculated signal strength is less than the reference strength, If it is determined that the noise ratio is equal to or less than the reference ratio, the broadcasting station transmitting the first broadcasting signal is confirmed (157).

The next audio device confirms the present location information of the vehicle (158), identifies the area where the vehicle is located based on the confirmed location information, confirms the area corresponding to the confirmed area (159) (160) from the broadcasting station.

The audio device activates (161) the second receiver to receive a second broadcast signal having an identified frequency.

Then, the audio device transmits information of the confirmed frequency to the tuner control unit 137. [

At this time, the tuner control unit 137 uses the second receiving unit to receive the second broadcasting signal having the confirmed frequency.

That is, the audio apparatus receives the frequency signal of the second broadcast signal using the second receiver, amplifies the high frequency signal among the frequency signals of the received second broadcast signal, and demodulates the amplified signal to generate a signal of an audible frequency range , Samples a signal in the audible frequency range as a digital signal, and stores the sampled digital signal in a second memory.

The audio device also stores a digital signal obtained by sampling the first broadcast signal received by the first receiver in the first memory.

If it is determined that the advertisement signal is a commercial broadcast signal, it is determined whether a predetermined time has elapsed. If it is determined that the predetermined time has elapsed, the audio device determines whether the first broadcast signal and the second broadcast signal And stores it.

It is also possible to determine whether the audio apparatus is an advertisement broadcast signal based on the second broadcast signal.

If it is determined that the first broadcast signal is not a commercial broadcast signal, the audio device compares the digital signal of the stored first broadcast signal and the digital signal of the second broadcast signal to calculate the similarity of the two broadcast signals.

In addition, the audio apparatus sequentially receives second broadcast signals having a plurality of frequencies if a plurality of frequencies are identified, and sequentially compares the digital signals of the second broadcast signal and the digital signals of the first broadcast signal And calculates the similarity.

If a plurality of regions corresponding to the identified region are present, the audio apparatus sequentially receives the second broadcast signals having at least one frequency for each region, and sequentially receives the digital signals of the second broadcast signals and the first broadcast signals And compares the digital signals with each other to calculate the similarity.

This will be described with reference to FIGS. 7 and 8. FIG.

It is assumed that the departure point of the vehicle is the metropolitan area (area A), the standard FM 95.9 MHz channel is selected, and the bus goes to Daegu through Busan.

When the vehicle passes through the Daegu (Region C), it passes through the overlapping area where the two regions overlap.

At this time, the audio apparatus provided in the vehicle receives all the broadcast signals transmitted from the two regions.

As a result, the reception sensitivity of a program broadcast at the standard FM 95.9 MHz becomes very low.

The audio device identifies the broadcasting station transmitting the first broadcast signal of the standard FM 95.9 MHz and confirms the frequency transmitted from the broadcasting company (MBC) in Daegu (C region) and Daejeon (E region).

Broadcasters (MBC) have frequencies of 96.5 MHz and 93.5 MHz in Daegu (C region) and 92.5 MHz and 97.5 MHz, respectively, in Daejeon (E region).

The audio apparatus receives a second broadcast signal of 93.5 MHz transmitted from a broadcaster in the cod (C region) using the second receiver, compares the digital signal of the received second broadcast signal with the digital signal of the first broadcast signal And calculates the similarity.

If it is determined that the calculated degree of similarity is less than or equal to the reference degree of similarity, the audio device determines (169) a different frequency, and receives a second broadcast signal having the identified different frequency, 1 broadcast signal to calculate the similarity.

That is, the audio apparatus receives the second 96.5 MHz broadcast signal transmitted from the broadcaster of the cod (region C) using the second receiver, compares the digital signal of the received second broadcast signal with the digital signal of the first broadcast signal And calculates the degree of similarity.

The audio device determines whether the calculated similarity is less than or equal to the reference similarity (165). If it is determined that the calculated similarity exceeds the reference similarity, the audio device confirms another frequency (169). If it is determined that there is no other frequency, And confirms the second broadcast signal having the frequency.

That is, the audio apparatus receives the second broadcast signal of 97.5 MHz transmitted from the broadcasting station in the competition (region E) using the second receiver, and compares the digital signal of the received second broadcast signal with the digital signal of the first broadcast signal And calculates the degree of similarity.

If it is determined that the calculated degree of similarity is less than or equal to the reference degree of similarity, the audio device determines (169) a different frequency, and receives a second broadcast signal having the identified different frequency, 1 broadcast signal to calculate the similarity.

That is, the audio apparatus receives the second broadcast signal of 92.5 MHz transmitted from the broadcasting station in the competition (region E) using the second receiver, compares the digital signal of the received second broadcast signal with the digital signal of the first broadcast signal And calculates the degree of similarity.

The audio device determines whether the calculated similarity is less than or equal to the reference similarity 165. If it is determined that the calculated similarity exceeds the reference similarity, the audio device identifies another frequency 169. If it is determined that there is no other frequency, And stops the reception of the second broadcast signal if it is determined that there is no other area.

The audio device deactivates (166) the second receiver.

If the number of frequencies in the frequency band exceeding the reference similarity is more than a reference frequency, the audio device confirms the frequency of the signal having the highest frequency among the plurality of frequencies, (167).

That is, the audio device confirms the frequencies of 96.5 MHz and 92.5 MHz, which are the same as the first broadcast signal of the standard FM 95.9 MHz, based on the similarity, and confirms the frequency of the signal intensity.

The audio device may maintain (168) the broadcast of the program selected by the user by receiving a broadcast signal having a changed frequency using the first receiver.

9 is a control structure of an audio apparatus provided in a vehicle according to another embodiment. The audio apparatus includes a first receiving unit 131, a second receiving unit 132, a first antenna 133, a third amplifying unit 134, A first signal processor 135, a first controller 136, a tuner controller 137, a first storage 138 and a position receiver 139b.

The first receiving unit 131, the second receiving unit 132, the first antenna 133, the third amplifying unit 134, the first signal processor 135, the first controller 136 , The tuner control unit 137, and the first storage unit 138 are the same as those in the first embodiment, and the description thereof will be omitted.

The audio apparatus according to another embodiment includes a position receiving unit which is not the first communication unit, unlike the embodiment.

That is, the audio apparatus according to another embodiment does not receive the positional information from the terminal but receives the positional information of the vehicle using the position receiving unit 139b provided therein.

The position receiving unit 139b includes a GPS (Global Positioning System) receiving unit (not shown) and a second signal processing unit (not shown) for processing the GPS signal acquired by the GPS receiving unit.

The GPS (Global Positioning System) receiving unit includes an antenna for receiving signals of a plurality of GPS satellites.

The second signal processing unit includes software for acquiring the current position using the distance and time information corresponding to the position signals of the plurality of GPS satellites and an output unit for outputting the acquired position information of the vehicle to the first control unit 136 .

10 is a control configuration diagram of a vehicle according to another embodiment.

The vehicle includes an audio device 130 and a position receiver 149. [

The audio apparatus provided in the vehicle of the other embodiment is the same as the audio apparatus provided in the vehicle of the embodiment, and the description is omitted.

However, the first communication unit of the audio apparatus provided in the vehicle of another embodiment performs communication with the position receiving unit 149, rather than the terminal, and receives the positional information from the position receiving unit 149. [

The position receiving unit 149 includes a GPS (Global Positioning System) receiving unit (not shown) and a second signal processing unit (not shown) for processing the GPS signal acquired by the GPS receiving unit.

The GPS (Global Positioning System) receiving unit includes an antenna for receiving signals of a plurality of GPS satellites.

The second signal processing unit includes software for acquiring the current position using the distance and time information corresponding to the position signals of the plurality of GPS satellites and an output unit for outputting the acquired position information of the vehicle to the first communication unit 139 .

The configuration for controlling the audio apparatus using the other position information is the same as that of the first embodiment, and the description is omitted.

1: vehicle 130: audio device
131: first receiving unit 132: second receiving unit
133: first antenna 134: third amplification unit
135: first signal processing unit 136: first control unit
137: tuner control unit 138: first storage unit
139: first communication unit 140:
141: position receiver 142: GPS receiver
143: second signal processing unit 144: second control unit
148:

Claims (17)

A first receiver for receiving a first broadcast signal for broadcasting a program selected by a user;
A second receiver for receiving at least one second broadcast signal;
A signal processor for calculating a degree of similarity by comparing the first broadcast signal and the at least one second broadcast signal and calculating a signal strength and a signal-to-noise ratio of the first broadcast signal;
And activating the second receiver if the signal strength of the first broadcast signal is less than or equal to a reference strength and the signal-to-noise ratio is less than or equal to a reference ratio, and at least one of the first and second at least one second broadcast signal Wherein the control unit is configured to determine whether a predetermined time has elapsed in the case of an advertisement broadcast signal and control to receive at least one second broadcast signal again when the predetermined time elapses, A second broadcast signal in which the degree of similarity of the first broadcast signal exceeds a reference degree of similarity based on the degree of similarity of the signals and a second broadcast signal in which the degree of similarity of the first broadcast signal exceeds a reference degree of similarity, The frequency of the second broadcast signal having the strongest intensity is checked, the frequency of the first receiver is changed to the identified frequency, When the frequency is changed, the audio apparatus including a control section for disabling the second receiver. The method according to claim 1,
Further comprising a communication unit for performing communication with an external terminal and receiving location information from the external terminal,
Wherein the control unit confirms the current location based on the location information, identifies the broadcasting station transmitting the first broadcasting signal, and confirms the frequency of the second broadcasting signal based on the confirmed current location and the broadcasting station. Device. 3. The apparatus of claim 2,
The control unit determines whether the current location is a predetermined overlapping area based on the location information, and if the current location is determined to be a predetermined overlapping area, controls the second receiving unit to sequentially receive a second broadcast signal for each area broadcasting the program Audio device. The method according to claim 1,
Further comprising a GPS receiver,
The control unit confirms the current location based on the location information of the GPS receiver, identifies a broadcasting station transmitting the first broadcasting signal, and determines a second broadcasting signal for broadcasting the program based on the determined current location and the broadcasting station An audio device comprising identifying a frequency. The method according to claim 1,
And a communication unit for performing communication with the GPS receiver,
The control unit confirms the current location based on the location information of the GPS receiver, identifies a broadcasting station transmitting the first broadcasting signal, and determines a second broadcasting signal for broadcasting the program based on the determined current location and the broadcasting station An audio device that includes identifying the frequency The method according to claim 1,
And an input unit for receiving an automatic channel change command. The signal processing apparatus according to claim 1,
A first memory for storing the first broadcast signal for a predetermined time; and a second memory for storing the second broadcast signal for the predetermined time. The method according to claim 1,
The first receiving unit includes a first tuner, a first amplifying unit amplifying a first broadcasting signal received by the first tuner, and a second detecting unit separating a signal in an audio frequency range from the amplified first broadcasting signal, ≪ / RTI >
The second receiving unit may include a second tuner, a second amplifying unit amplifying a second broadcasting signal received by the second tuner, and a second detecting unit separating a signal in an audio frequency range from the amplified second broadcasting signal, / RTI > 9. The method of claim 8,
And a third amplifying unit amplifying a signal of an audible frequency range separated by the first detecting unit. In a vehicle including a car terminal and an audio device,
The audio apparatus includes:
A first receiver for receiving a first broadcast signal of a first region for broadcasting a program selected by a user;
A second receiver for receiving a second broadcast signal of a region different from the first region;
A signal processor for calculating a degree of similarity to the first broadcast signal by comparing the first broadcast signal and the second broadcast signal and calculating a signal strength and a signal-to-noise ratio of the first broadcast signal;
If the signal strength of the first broadcast signal is equal to or lower than the reference strength and the signal-to-noise ratio is equal to or lower than the reference ratio, it is determined that the region is changed and the second receiver is activated, And checks the second broadcast signal whose similarity with the first broadcast signal exceeds the reference similarity, and if the second broadcast signal exceeds the reference similarity, if the second broadcast signal has a plurality of second broadcast signals, And a control unit for confirming the frequency of the second highest broadcast signal, changing the reception frequency of the first reception unit to the identified frequency, and deactivating the second reception unit,
Wherein the control unit determines whether a predetermined time has elapsed if at least one of the first and second broadcast signals is an advertisement broadcast signal at the time of comparing the first broadcast signal and the second broadcast signal, And to receive the first broadcast signal and the second broadcast signal again. 11. The method of claim 10,
Wherein the control unit changes the frequency of the first receiving unit to the frequency of the second broadcasting signal if the second broadcasting signal having a degree of similarity to the first broadcasting signal exceeds a reference similarity. The vehicle terminal according to claim 10,
A GPS receiver, and a communication unit for transmitting position information. 13. The audio apparatus according to claim 12,
The control unit determines whether the current location is a predetermined overlapping area based on the location information, and if the current location is determined to be a predetermined overlapping area, controls the second receiving unit to sequentially receive a second broadcast signal for each area broadcasting the program ≪ / RTI > The audio apparatus according to claim 10,
Further comprising a storage unit for storing frequencies of respective broadcasters of a plurality of regions. A GPS receiver for receiving position information corresponding to a current position;
A first receiver for receiving a first broadcast signal of a first region for broadcasting a program selected by a user;
A second receiver for receiving a second broadcast signal of a region different from the first region;
A signal processing unit for calculating a signal intensity of the first broadcast signal and a signal-to-noise ratio and for calculating the similarity by comparing the first broadcast signal and the second broadcast signal; And
If the signal strength of the first broadcast signal is equal to or lower than a reference intensity and the signal-to-noise ratio is less than a reference ratio, the controller determines whether the current position is a predetermined overlapping region. If the current position is determined not to be a predetermined overlapping region, Confirms the frequency of the second broadcasting signal broadcasting the program based on the current position and the broadcasting station information, and controls the frequency of the first receiving unit And a control unit for changing the frequency of the first receiver to the identified frequency and deactivating the second receiver if the frequency of the first receiver is changed,
Wherein the control unit controls the second receiver to sequentially receive a second broadcast signal for each region of the overlapping region if the current position is a predetermined overlapping region and to sequentially receive the second broadcast signal for each region of the overlapping region, A second broadcast signal in which the degree of similarity between the second broadcast signal and the first broadcast signal received in the first broadcast signal is greater than the reference degree of similarity, The frequency of the second broadcast signal having the strongest signal strength among the plurality of second broadcast signals is checked and the frequency of the first receiver is changed to the identified frequency, And deactivating the second receiver if the frequency is changed,
Wherein the overlap region is a region in which at least two regions different from the region of the departure point where the first broadcast signal is selected overlap. A method of controlling an audio apparatus provided in a vehicle,
A first broadcast signal for activating a first receiver and broadcasting a program selected by a user is received in a first region,
Broadcasting the program based on the received first broadcast signal,
Wherein if the signal strength of the first broadcast signal is equal to or lower than a reference strength and the signal-to-noise ratio of the first broadcast signal is lower than a reference ratio,
If the determined current location is not an overlapping area, checking a region corresponding to the identified current location,
Checking a frequency of a broadcasting station broadcasting the program in the identified area,
Activating a second receiver to receive the identified frequency,
Comparing the first broadcast signal with a second broadcast signal received by the second receiver to calculate a degree of similarity,
And if the calculated degree of similarity exceeds a reference degree of similarity, changing the frequency of the first receiving unit to the identified frequency so that the program is broadcast, deactivating the second receiving unit when the frequency of the first receiving unit changes,
If the calculated degree of similarity is less than the reference degree of similarity, selects another frequency to be transmitted from the broadcaster and controls the second receiving unit to receive the different frequency,
If the identified current location is an overlapping area, the frequency of the broadcasting station broadcasting the program is checked for each zone,
Sequentially receiving a second broadcast signal for each domain through the second receiver based on the identified frequency for each domain,
Calculating a degree of similarity between the second broadcast signal and the first broadcast signal of the second receiver sequentially received,
The second broadcast signal having similarity exceeding a reference similarity among the calculated similarities,
And changing the frequency of the first receiver to the frequency of the second broadcast signal to cause the program to be broadcast,
And if the computed similarity exceeds the reference similarity, changing the frequency of the first receiving unit to the identified frequency to cause the program to be broadcast, and deactivating the second receiving unit when the frequency of the first receiving unit is changed,
Determining whether there are a plurality of second broadcast signals exceeding the reference similarity, determining that a plurality of second broadcast signals exceeding the reference similarity are included in the plurality of second broadcast signals, The frequency of the first receiving unit is changed to the identified frequency and the frequency of the first receiving unit is changed to deactivate the second receiving unit. 17. The method of claim 16,
And broadcasting the program based on the first broadcast signal received by the first receiver if the intensity of the signal of the first broadcast signal exceeds a reference intensity or the signal-to-noise ratio exceeds a reference rate, A method of controlling a device.

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