JP2018098568A - Broadcast reception device and broadcast reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve convenience for user concerning a broadcast reception device.SOLUTION: An on-vehicle device 1 includes: a first tuner 120 for receiving a broadcast; a second tuner 121 for receiving a broadcast independently from the first tuner 120; a reception state detection section 102 for detecting a reception state of the first tuner 120 and a reception state of the second tuner 121; and a control section 101 for determining whether a second program with the same contents as those of a first program is being broadcast by a second broadcast system different from a first broadcast system in a case where the reception state detection section 102 detects deterioration of a reception state of the first tuner 120 when the first tuner 120 receives a broadcast related to the first program to be broadcast by the first broadcast system and is outputting the received broadcast, and allowing the second tuner 121 to receive the broadcast related to the second program when it is determined that the second program is being broadcast.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a broadcast receiving apparatus and a broadcast receiving method.

  2. Description of the Related Art Conventionally, with regard to a broadcast receiving apparatus that receives broadcast waves, a technique for switching to a broadcast desired by the user when the reception state of the broadcast selected by the user deteriorates is known (for example, see Patent Document 1). Patent Document 1 discloses a receiver for RBDS that uses RBDS (Radio Broadcast Data System) data and position information data to automatically follow a broadcasting station that broadcasts programs of the same genre. .

JP-A-6-268484

By the way, in recent years, there are cases where a broadcasting station broadcasts the same program in the same time zone using different broadcasting methods. And in the apparatus which receives the program which a broadcast station broadcasts like the broadcast receiving apparatus of the patent document 1 mentioned above, when a broadcast station broadcasts the same program in the same time slot | zone with a different broadcast system There is a need to improve the convenience of users by performing processing based on the fact that there is a problem.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to improve user convenience for a broadcast receiving apparatus and a broadcast receiving method.

  In order to achieve the above object, a broadcast receiving apparatus of the present invention includes a first broadcast receiving unit capable of receiving a broadcast and a second broadcast receiving unit capable of receiving a broadcast independently of the first broadcast receiving unit. Broadcast in the first broadcast system by means, a reception state detection means for detecting a reception state of the first broadcast reception means and a reception state of the second broadcast reception means, and the first broadcast reception means When receiving the broadcast related to the first program to be output and outputting the received broadcast, when the reception state detection unit detects that the reception state of the first broadcast reception unit has deteriorated, It is determined whether or not a second program having the same content as the first program is broadcast in a second broadcast system different from the first broadcast system, and the second program is broadcast. Is determined, the second broadcast receiving means sends the second number. And a control means for receiving a broadcast according to.

  In the above configuration, the control means causes the second broadcast receiving means to receive the broadcast related to the second program, and then receives the first broadcast receiving means detected by the reception state detecting means. When the second broadcast receiving means is in a better receiving state, the first program received by the first broadcast receiving means is compared with the state of the first program received by the second broadcast receiving means. The broadcast output may be stopped, and the broadcast output related to the second program received by the second broadcast receiving unit may be started.

  Further, in the above configuration, the control means causes the second broadcast receiving means to receive the broadcast related to the second program, and then detects the first broadcast receiving means detected by the reception state detecting means. When the reception status of the first broadcast reception means is better, the first broadcast reception means receives the first broadcast reception means. Broadcast output related to the program may be continued.

  In the above configuration, the broadcast receiving device includes storage means for storing information related to the broadcast of the first broadcast system and the broadcast of the second broadcast system related to a common program, and the control means includes: Whether the second program having the same content as the first program is being broadcast in the second broadcasting system different from the first broadcasting system, based on the information stored in the storage means May be determined.

  Further, in the above configuration, the broadcast receiving device further includes a communication unit that communicates with an external device, and the control unit causes the communication unit to transmit the second device different from the first broadcast method to the external device. Inquires whether the second program having the same content as the first program is broadcast in the broadcasting system, and the second broadcasting different from the first broadcasting system based on a response to the inquiry The method may determine whether the second program having the same content as the first program is being broadcast.

  Further, in the above configuration, the broadcast receiving apparatus has a phase diver function, and the control means uses the first broadcast receiving means to perform FM related to the first program as the broadcast of the first broadcast system. While receiving a broadcast, the phase diver function causes the second broadcast receiving means to receive an FM broadcast related to the first program, and an audio signal based on the broadcast received by the first broadcast receiving means; The audio signal based on the broadcast received by the second broadcast receiving means is synthesized and output, while the reception status detecting means receives the reception status of the first broadcast receiving means and the reception of the second broadcast receiving means. If it is detected that the condition has deteriorated, it is determined whether or not the second program having the same content as the first program is being broadcast in the second broadcasting system different from the first broadcasting system. Size And, when the second program is determined to have been broadcast, disable the phase diver function, the second broadcast receiving unit, may be receiving a broadcast according to the second program.

  In the above configuration, the broadcast receiving unit has a scan diver function, and the control unit is receiving the first broadcast system broadcast related to the first program. The first broadcast receiving means detected by the reception state detecting means by causing the second broadcast receiving means to receive the broadcast of the first broadcast system related to the first program by the scan diver function. Is compared with the reception state of the second broadcast receiving means, and the broadcast received by the broadcast receiving means having the better reception state is output, while the reception state detecting means is used to output the broadcast having the better reception state. When it is detected that the reception state of the broadcast receiving unit has deteriorated, the second program having the same content as the first program is broadcast in the second broadcasting system different from the first broadcasting system. Whether or not However, if it is determined that the second program is broadcast, the scan diver function is disabled and the broadcast receiving means having a poor reception state can receive the broadcast related to the second program. Good.

  In order to achieve the above object, the broadcast receiving method of the present invention receives a broadcast related to the first program broadcast by the first broadcast system by the first broadcast receiving means capable of receiving a broadcast, While the received broadcast is output and the broadcast related to the first program is being output, the reception state of the first broadcast reception means is detected, and the reception state of the first broadcast reception means has deteriorated Is detected, it is determined whether or not a second program having the same content as the first program is being broadcast in a second broadcasting system different from the first broadcasting system, and the second broadcasting system is determined. When it is determined that the program is being broadcast, the second broadcast receiving unit capable of receiving the broadcast independently of the first broadcast receiving unit receives the broadcast related to the second program.

  According to the present invention, user convenience can be improved.

The functional block diagram of the vehicle-mounted apparatus which concerns on this embodiment. The schematic diagram of the content of the same program frequency table. The flowchart which shows operation | movement of the vehicle-mounted apparatus at the time of outputting AM radio broadcast. The flowchart which shows operation | movement of the vehicle-mounted apparatus at the time of outputting FM radio broadcasting. The flowchart which shows operation | movement of the vehicle-mounted apparatus at the time of outputting FM radio broadcasting. The flowchart which shows operation | movement of the vehicle-mounted apparatus at the time of outputting FM radio broadcasting.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. First, the configuration of the in-vehicle device 1 (broadcast receiving device) will be described with reference to FIG.

FIG. 1 is a functional block diagram of the in-vehicle device 1.
The in-vehicle device 1 is a device mounted on a vehicle. The in-vehicle device 1 has a function of detecting the current position of the vehicle to detect the current position of the vehicle, a function of displaying the vehicle position to display the current position of the vehicle on a map, and a function of performing a route search to search for a route to the destination. And a so-called car navigation device having a function of displaying a map, displaying a route to the destination on the map, and performing route guidance for guiding the route to the destination. The in-vehicle device 1 has a function of receiving an analog broadcast wave broadcast by a radio broadcast station (broadcast station) and outputting a radio broadcast based on the analog broadcast wave. Specifically, the in-vehicle device 1 has a function of receiving an AM broadcast wave of an AM broadcast system and outputting a radio broadcast based on the AM broadcast (hereinafter referred to as “AM radio broadcast”). The in-vehicle device 1 has a function of receiving FM broadcast waves of the FM broadcast system and outputting a radio broadcast based on the FM radio broadcast (hereinafter referred to as “FM radio broadcast”).

  The in-vehicle device 1 includes a main control unit 10, a first tuner unit 120 (first broadcast receiving unit), a second tuner unit 121 (second broadcast receiving unit), a display 14a, and a display processing unit 14b. , Input unit 15, DSP 13 (digital signal processor), power amplifier 20, speaker 21, GPS unit 16 (position detection unit), relative orientation detection unit 22, communication unit 19 (communication unit), storage Part 18.

  The main control unit 10 includes a CPU, ROM, RAM, and other peripheral circuits. The main control unit 10 includes a control unit 101 (control unit) and a reception state detection unit 102 (reception state detection unit). The main control unit 10 controls each unit of the in-vehicle device 1 in cooperation with hardware and software, such as reading and executing a control program stored in the ROM. The control unit 101 and the reception state detection unit 102 will be described later.

The first tuner unit 120 includes an antenna 120a and a reception state measurement unit 120b.
The first tuner unit 120 controls the RF of an analog broadcast wave having a frequency selected by the user from among the analog broadcast waves received by the antenna 120a under the control of a PLL (Phase Locked Loop) circuit (not shown) by the control unit 10. (Radio Frequency) signal is extracted. Then, the first tuner unit 120 converts the RF signal to an intermediate frequency suitable for signal processing such as filtering, and obtains an IF (Intermediate Frequency) signal. The first tuner unit 120 amplifies the IF signal obtained by the frequency conversion of the RF signal and outputs it to the A / D converter 13a.

The reception state measurement unit 120b is configured such that the electric field intensity of the analog broadcast wave received by the first tuner unit 120 via the antenna 120a, the multipath noise (MPN) mixed in the first tuner unit 120, and the adjacent received analog broadcast wave. The interference level (USN) is measured, and signals indicating the electric field strength, MPN, and USN are output to the main control unit 10 according to the control of the control unit 101.
Under the control of the control unit 101, the reception state detection unit 102 of the main control unit 10 is based on a signal indicating the electric field strength, USN, and MPN of the analog signal wave input from the reception state measurement unit 120b. Calculates the S / N ratio (reception state) of the analog broadcast wave received. The reception state detection unit 102 outputs the calculated S / N ratio corresponding to the first tuner unit 120 to the control unit 101.

The second tuner unit 121 includes an antenna 121a and a reception state measurement unit 121b.
The second tuner unit 121 extracts an RF signal of an analog broadcast wave having a frequency of a radio broadcast selected by the user from analog broadcast waves received by the antenna 121a under control via a PLL circuit (not shown). The second tuner unit 121 converts the extracted RF signal to an intermediate frequency suitable for signal processing such as filtering, and obtains an IF signal. The second tuner unit 121 amplifies the IF signal and outputs it to the A / D converter 13b.

The reception state measurement unit 121b is configured such that the electric field intensity of the analog broadcast wave received by the second tuner unit 121 via the antenna 121a, the multipath noise (MPN) mixed in the second tuner unit 121, and the adjacent received analog broadcast wave. The interference level (USN) is measured, and signals indicating the electric field strength, MPN, and USN are output to the main control unit 10 according to the control of the control unit 101.
Under the control of the control unit 101, the reception state detection unit 102 of the main control unit 10 is based on the signal indicating the electric field strength, USN, and MPN of the analog signal wave input from the reception state measurement unit 121b. Calculates the S / N ratio of the received analog broadcast wave. The reception state detection unit 102 outputs the calculated S / N ratio corresponding to the second tuner unit 121 to the control unit 101.

  The display 14a is, for example, a liquid crystal panel or an organic EL display panel, and displays various images based on signals input from the display control unit 14b.

  The display control unit 14b outputs a control signal for displaying an image on the display 14a based on a signal input from the main control unit 10. For example, the display control unit 14b generates a signal so as to draw map information such as roads and buildings, and route information such as current location, waypoints, destinations, and arrows for recommended routes using a designated scale and drawing method. Generate. In addition, the display control unit 14b generates a signal so as to draw an image such as an icon, a button, or an operation menu for receiving a user instruction.

  The input unit 15 includes a touch panel 15a and an operation unit 15b.

  The touch panel 15a is provided so as to overlap the display surface of the display 14a, and detects a touch operation on the touch panel 15a by the user. When the touch operation is detected by the user, the touch panel 15a outputs a signal indicating the position where the contact operation is performed to the main control unit 10. Based on the signal input from the touch panel 15a, the control unit 101 of the main control unit 10 executes a process corresponding to the contact operation by the user.

  The operation unit 15b includes at least a plurality of channel selection buttons and a volume change button. The operation unit 15b detects a channel selection operation for the channel selection button, and outputs a signal corresponding to the channel selection operation to the main control unit 10.

  The DSP 13 includes an A / D converter 13a, an A / D converter 13b, a demodulation unit 13c, a demodulation unit 13d, a switching unit 13e, a combining unit 13f, and a D / A converter 13g.

  The A / D converter 13a converts the IF signal input from the first tuner unit 120 from an analog signal to a digital signal. The A / D converter 13b converts the IF signal input from the second tuner unit 121 from an analog signal to a digital signal.

  The demodulator 13c limits the bandwidth of the IF signal input from the A / D converter 13a so as to be an IF signal in a carrier band. Thereafter, the demodulator 13c demodulates the band-limited IF signal into a carrier wave audio signal (hereinafter referred to as a “first radio audio signal”). The demodulation unit 13c outputs the first radio audio signal to the switching unit 13e.

  The demodulator 13d limits the bandwidth of the IF signal input from the A / D converter 13b so as to be an IF signal in the carrier band. Thereafter, the demodulator 13d demodulates the band-limited IF signal into a radio audio signal (hereinafter referred to as “second radio audio signal”). The demodulator 13d outputs the second radio audio signal to the switching unit 13e.

  The switching unit 13e outputs the first radio audio signal input from the demodulation unit 13c to the synthesis unit 13f under the control of the control unit 101, or synthesizes the second radio audio signal input from the demodulation unit 13d. It is switched between outputting to the unit 13f or outputting both the first radio audio signal input from the demodulator 13c and the second radio audio signal input from the demodulator 13d to the synthesizer 13f.

  When the first radio audio signal and the second radio audio signal are both input from the switching unit 13e under the control of the control unit 101, the synthesis unit 13f combines and outputs these radio audio signals. Or either one of the audio signals is selectively output. The synthesizing unit 13f is input when either the first radio audio signal or the second radio audio signal is input from the switching unit 13e under the control of the control unit 101. Output a radio audio signal.

  The D / A converter 13 g converts the radio audio signal input from the combining unit 13 f from a digital signal to an analog signal and outputs the analog signal to the power amplifier 20.

The power amplifier 20 amplifies the level of the radio audio signal with an amplification factor corresponding to the volume designated by the user, and inputs the amplified signal to the speaker 21.
When the control unit 101 of the main control unit 10 detects an operation on the volume change button of the operation unit 15b, the control unit 101 causes the power amplifier 20 to amplify the AM radio audio signal with an amplification factor corresponding to this operation and output the amplified signal to the speaker 21. Let

The speaker 21 converts the radio audio signal into vibration and outputs sound as radio sound.
A state in which radio sound is output from the speaker 21 based on a radio broadcast received by the first tuner unit 120 or the second tuner unit 121 corresponds to a “state in which a broadcast is output”.

  The GPS unit 16 receives GPS radio waves from GPS satellites via a GPS antenna (not shown), and calculates position information indicating the current location of the vehicle on which the in-vehicle device 1 is mounted from the GPS signals superimposed on the GPS radio waves. The GPS unit 16 outputs position information indicating the current location of the vehicle on which the in-vehicle device 1 is mounted to the main control unit 10.

  The relative orientation detection unit 22 includes a gyro sensor 22a and an acceleration sensor 22b. The gyro sensor 22a is constituted by, for example, a vibrating gyroscope and detects a relative direction of the vehicle (for example, a turning amount in the yaw axis direction). The acceleration sensor 22b detects acceleration (for example, the inclination of the vehicle with respect to the traveling direction) acting on the vehicle. The relative direction detection unit 22 outputs information indicating the relative direction of the vehicle and information indicating the acceleration acting on the vehicle to the main control unit 10. The control unit 101 of the main control unit 10 detects the relative azimuth of the vehicle and the acceleration acting on the vehicle based on the input from the relative azimuth detection unit 22.

The storage unit 18 includes a nonvolatile memory and stores various data. The storage unit 18 stores map data 18a and the same program frequency table 18b.
The map data 18a includes road image data used when a road shape is drawn on a map, background image data used when a background such as terrain is drawn on a map, a character string indicating an administrative division, and a character indicating an intersection name. Image data used for displaying a map such as character string image data used when a character string such as a character string indicating a column or a road name is drawn on a map. The map data 18a includes facility information related to facilities existing on the map. For each facility, the facility information includes at least facility position information indicating the position of the facility and image data used when the facility is displayed as an icon on the map.

  The same program frequency table 18b will be described later.

  Under the control of the control unit 101, the communication unit 19 and a device (including a server 400 to be described later) connected to the global network GN via a global network GN configured by the Internet, a telephone network, and other networks and a predetermined number. Communicate according to communication standards. The predetermined communication standard is, for example, HTTP, and, for example, WebSocket.

  As described above, the in-vehicle device 1 searches for a route to the destination, a function for detecting the current vehicle position for detecting the current position of the vehicle, a function for displaying the vehicle position on the map, and a vehicle position display. A function for performing a route search and a function for displaying a map, displaying a route to the destination on the map, and performing a route guidance for guiding the route to the destination are provided. When detecting the vehicle position, the main control unit 10 detects the current position of the vehicle based on the input from the GPS unit 16 and the relative direction detection unit 22 and the map data 18a. Note that any method may be used for detecting the current position of the vehicle, and information other than the information exemplified in the present embodiment, such as information indicating the vehicle speed, may be used for detection. When displaying the vehicle position, the main control unit 10 displays a map of a predetermined scale centered on the detected current position on the display 14a based on the map data 18a, and a mark indicating the detected current position of the vehicle. Is displayed on the map. Further, when searching for a route, the main control unit 10 searches for a route from the detected current position to the destination set by the user based on the map data 18a. In route guidance, the main control unit 10 displays the route to the destination on the map, displays the detected current position of the vehicle on the map, and guides the route to the destination.

The server 400 is a server device connected to the global network GN.
As shown in FIG. 1, the server 400 stores an AM broadcast station database 402 and an FM broadcast station database 403.
The AM broadcast station database 402 stores an AM radio broadcast program guide for each AM radio broadcast area. The AM radio broadcast program table corresponding to one broadcast area includes, for each AM radio broadcast channel in the one broadcast area, information indicating the frequency of the channel and information indicating a time zone of a program broadcast on each channel. , Information for identifying each program (hereinafter referred to as “program identification information”) is stored in association with each other. The program identification information may be the program name of the program, or may be a code uniquely assigned to each program.
The FM broadcast station database 403 stores an FM radio broadcast program guide for each FM radio broadcast area. The FM radio broadcast program table corresponding to one broadcast area includes information indicating the frequency of the channel and information indicating the time zone of the program broadcast on each channel for each FM radio broadcast channel in the one broadcast area. The program identification information of each program is stored in association with each other.
Hereinafter, when the AM radio broadcast program guide and the FM radio broadcast program guide are not distinguished, they are expressed as “radio broadcast program guide”.

The server 400 has the following functions.
That is, server 400 receives a control command (hereinafter, referred to as “program guide request command”) that instructs a request for a response to a radio broadcast program guide from an external device (including in-vehicle device 1). The program guide request command includes at least information indicating the current position of the external device. When receiving the program guide request command, the server 400 specifies the broadcast area to which the position of the external device indicated by the information included in the program guide request command belongs. Next, the server 400 refers to the AM broadcast station database 402 and acquires the AM radio broadcast program guide of the broadcast area to which the position of the external device belongs. Further, the server 400 refers to the FM broadcast station database 403 and acquires the FM radio broadcast program guide of the broadcast area to which the position of the external device belongs. Next, the server 400 transmits the acquired AM radio broadcast program guide and FM radio broadcast program guide to an external device.
As described above, an external device (including the in-vehicle device 1) transmits a program guide request command to the server 400, whereby the AM radio broadcast program guide of the broadcast area to which the position of the external device belongs, and FM radio broadcast program guide can be acquired.

Next, the same program frequency table 18b will be described.
The control unit 101 of the in-vehicle device 1 transmits a program guide request command to the server 400 at a predetermined timing while the power of the in-vehicle device 1 is turned on. As described above, the program guide request command has information indicating the position of the in-vehicle device 1. The control unit 101 detects the current position of the vehicle from the input of the GPS unit 16 and the like, and generates a program guide request command based on information indicating the detected current position.
For example, the predetermined timing is a periodic timing at intervals. In this case, the control unit 101 periodically transmits a program guide request command to the server 400 at intervals while the power of the in-vehicle device 1 is turned on.
Further, for example, the predetermined timing is a timing at which the control unit 101 detects that the vehicle has entered from one broadcast area to another broadcast area. In this case, the control unit 101 manages the area of each broadcast area, and the vehicle is moved from one broadcast area according to the relationship between the position of the vehicle calculated from the input of the GPS unit 16 and the area of each broadcast area. Detecting that it has entered another broadcasting area.

As described above, when the server 400 receives the program guide request command from the in-vehicle device 1, the server 400 displays the AM radio broadcast program guide and the FM radio broadcast program guide in the broadcast area to which the position of the in-vehicle device 1 belongs. Send to.
The control unit 101 of the in-vehicle device 1 receives and acquires the AM radio broadcast program guide and the FM radio broadcast program guide transmitted from the server 400. Next, the control unit 101 generates the same program frequency table 18b based on the acquired AM radio broadcast program guide and FM radio broadcast program guide.

FIG. 2 is a diagram schematically showing the contents of the same program frequency table 18b.
The same program frequency table 18b includes information indicating the name of the broadcast area and the AM radio broadcast corresponding to the simulcast for each simulcast when the simulcast is performed in the broadcast area to which the vehicle position belongs. It is the table which matches and memorize | stores the information which shows a frequency, and the information which shows the frequency of FM radio broadcasting corresponding to simulcast.
In the present embodiment, simulcast means that a predetermined broadcast station broadcasts the same program in the same broadcast time in the same broadcast area in both the AM broadcast system and the FM broadcast system. To do.
The control unit 101 analyzes the acquired AM radio broadcast program guide and FM radio broadcast program guide, and determines whether or not simulcast is being performed in the broadcast area to which the vehicle position belongs. When determining that the simulcast is being performed, the control unit 101 obtains information indicating the name of the broadcast area, the frequency of the AM radio broadcast corresponding to the simulcast, and the frequency of the FM radio broadcast corresponding to the simulcast. The associated record is registered in the same program frequency table 18b.

  In the example of FIG. 2, the record R1 of the same program frequency table 18b includes AM radio broadcast: AAA kHz and FM radio broadcast: AA. AMHz means that simulcast is being carried out.

By the way, when the in-vehicle device 1 outputs a radio broadcast of any one of the AM broadcast method and the FM broadcast method, the sound is disturbed due to the state of reception intensity, the state of noise, and other factors. There are times when it becomes difficult for the passengers of the vehicle to hear the sound.
Based on this, the in-vehicle device 1 according to the present embodiment preferably uses the fact that a broadcast station may perform simultaneous broadcasting as described above, and performs the following processing to improve user convenience. To improve. Hereinafter, the operation of the in-vehicle device 1 will be described in detail.

First, the operation of the in-vehicle device 1 when receiving and outputting an AM broadcast radio broadcast will be described.
FIG. 3 is a flowchart showing the operation of the in-vehicle device 1 when receiving and outputting an AM broadcast radio broadcast. At the start of the flowchart in FIG. 3, the in-vehicle device 1 is in the following state. That is, of the first tuner unit 120 and the second tuner unit 121, the operation of the second tuner unit 121 is stopped, and the AM radio broadcast of a predetermined channel (frequency) designated by the user by the first tuner unit 120. Is received. Furthermore, based on the AM radio broadcast received by the first tuner unit 120, the AM radio broadcast is output as a sound by the function of the DSP 13 and other elements. The control unit 101 controls the switching unit 13e so that the switching unit 13e selectively outputs the first radio audio signal to the combining unit 13f.

As shown in FIG. 3, the control unit 101 of the in-vehicle device 1 monitors whether or not the reception state of the first tuner unit 120 has deteriorated (step S101). In step S101, the control unit 101 executes the following processing. That is, the control unit 101 periodically acquires an S / N ratio corresponding to the first tuner unit 120 input from the reception state detection unit 102 at intervals. The control unit 101 compares the acquired S / N ratio with a predetermined threshold, and determines that the reception state of the first tuner unit 120 has deteriorated when the S / N ratio falls below the predetermined threshold.
The predetermined threshold is set to a value that makes it difficult for the user to hear the radio broadcast that is output as sound when the S / N ratio falls below the predetermined threshold. Accordingly, the processing after step S102 is executed when the radio broadcast that is output as audio becomes difficult for the user to hear.

  If it is determined in step S101 that the reception state of the first tuner unit 120 has not deteriorated (step S101: NO), the process returns to step S101.

  If it is determined in step S101 that the reception state of the first tuner unit 120 has deteriorated (step S101: YES), the control unit 101 specifies the current location of the vehicle based on the input from the GPS unit 16 or the like (step S101). S102).

Next, the control unit 101 refers to the same program frequency table 18b (step S103).
Next, based on the same program frequency table 18b referred to, the control unit 101 determines whether or not simultaneous broadcasting is being performed for the AM radio broadcast being received (in the broadcast area to which the vehicle position belongs, in the same time zone). It is determined whether there is an FM radio broadcast that broadcasts the same program (step S104).

When the simulcast is not performed for the AM radio broadcast being received (step S104: NO), the control unit 101 ends the process.
When the simulcast is being performed for the AM radio broadcast being received (step S104: YES), the control unit 101 acquires the frequency of the FM radio broadcast corresponding to the simulcast based on the same program frequency table 18b. (Step S105).
Next, the control unit 101 controls the second tuner unit 121 to start reception of the FM radio broadcast having the frequency acquired in step S105 (step S106). At this point, the control unit 101 maintains the state where the switching unit 13e outputs the first radio audio signal to the synthesis unit 13f.

Next, the control unit 101 monitors whether or not the reception state of the second tuner unit 121 that receives the FM radio broadcast is better than the reception state of the first tuner unit 120 that receives the AM radio broadcast ( Step S107).
In step S <b> 107, the control unit 101 compares the S / N ratio related to the first tuner unit 120 input from the reception state detection unit 102 with the S / N ratio related to the second tuner unit 121. Then, when the S / N ratio related to the second tuner unit 121 is larger than the S / N ratio related to the first tuner unit 120, the control unit 101 receives the FM radio broadcast when the S / N ratio is higher than the first tuner unit 120. It is determined that the reception state 121 is better than the reception state of the first tuner unit 120 that receives the AM radio broadcast.

  In step S107, when the reception state of the second tuner unit 121 that receives the FM radio broadcast is better than the reception state of the first tuner unit 120 that receives the AM radio broadcast (step S107: YES), control is performed. The unit 101 controls the switching unit 13e to stop the output of the first radio audio signal by the switching unit 13e, and causes the switching unit 13e to start outputting the second radio audio signal (step S108). As a result of the process in step S108, the radio broadcast output as audio is switched from the AM radio broadcast received by the first tuner unit 120 to the FM radio broadcast received by the second tuner unit 121.

  On the other hand, when the reception state of the second tuner unit 121 that receives the FM radio broadcast is not better than the reception state of the first tuner unit 120 that receives the AM radio broadcast in step S107 (step S107: NO), The process returns to step S107. That is, the control unit 101 continuously determines whether the reception state of the second tuner unit 121 that receives FM radio broadcast is better than the reception state of the first tuner unit 120 that receives AM radio broadcast. To monitor.

  As a result of the above processing, even when the AM radio broadcast becomes difficult to hear during reception of the AM radio broadcast, the user is more easily heard when the simulcast is being performed. Thus, it becomes possible to continuously listen to the same program, and the convenience for the user is improved.

  Next, the operation of the in-vehicle device 1 when receiving and outputting an FM broadcast radio broadcast will be described.

FIG. 4 is a flowchart showing the operation of the in-vehicle apparatus 1 when receiving and outputting an FM broadcast radio broadcast.
Here, the in-vehicle device 1 according to the present embodiment has a phase diver function. The in-vehicle device 1 receives FM radio broadcast in the following manner when the phase diver function is valid with respect to reception of FM radio broadcast.
That is, when one channel of FM radio broadcasting is selected by the user, the control unit 101 transmits FM broadcast waves having the frequency of the one channel to both the first tuner unit 120 and the second tuner unit 121. To receive. Further, the control unit 101 controls the switching unit 13e to output both the first radio audio signal and the second radio audio signal to the synthesis unit 13f. Further, the control unit 101 controls the combining unit 13f to combine the first radio audio signal and the second radio audio signal, and to output the combined radio audio signal to the D / A converter 13g.
According to the phase diver function, radio broadcasting can be performed in a stable and easy-to-listen state compared to the case where FM tuner broadcasting is received by either one of the first tuner unit 120 and the second tuner unit 121. Can be output.

  And at the time of the start of the flowchart of FIG. 4, the vehicle-mounted apparatus 1 is in the following states. That is, the in-vehicle device 1 is in a state where the phase diver function is enabled. Therefore, at the start of the flowchart of FIG. 4, both the first tuner unit 120 and the second tuner unit 121 are in a state where FM radio broadcast of the same frequency is received, and the first tuner unit The first radio audio signal (audio signal) based on the FM radio broadcast received by 120 and the second radio audio signal (audio signal) based on the FM radio broadcast received by the second tuner unit 121 are synthesized and output. State.

The control unit 101 controls the reception state detection unit 102 and monitors whether the reception states of both the first tuner unit 120 and the second tuner unit 121 have deteriorated (step S201). In step S201, the control unit 101 determines that both the S / N ratio of the first tuner unit 120 and the S / N ratio of the second tuner unit 121 are predetermined based on the input from the reception state detection unit 102. When the threshold value (threshold value may be different for the first tuner unit 120 and the second tuner unit 121 may be different), the first tuner unit 120, and It is determined that both reception states of the second tuner unit 121 have deteriorated.
Here, when the phase diver function is valid and the reception state of both the first tuner unit 120 and the second tuner unit 121 deteriorates, it becomes difficult for the user to hear the radio broadcast that is output as sound. Based on this, in step S201, the control unit 101 determines whether or not the radio broadcast that is output as audio is in a state that is difficult for the user to hear. In addition, when the phase diver function is valid, the predetermined threshold is less likely to be heard by the user when the S / N ratio falls below the predetermined threshold. Appropriately determined.

  In step S201, when it is determined that the reception states of the first tuner unit 120 and the second tuner unit 121 have not deteriorated (step S201: NO), the process returns to step S201.

  In step S201, when it is determined that the reception state of the first tuner unit 120 and the second tuner unit 121 has deteriorated (step S201: YES), the control unit 101, based on the input from the GPS unit 16 or the like, The current location of the vehicle is specified (step S202).

Next, the control unit 101 refers to the same program frequency table 18b (step S203).
Next, based on the same program frequency table 18b referred to, the control unit 101 determines whether or not simulcasting is being performed for the FM radio broadcast being received (in the same time zone in the broadcast area to which the vehicle position belongs). It is determined whether there is an AM radio broadcast that broadcasts the same program (step S204).

When the simulcast is not performed for the FM radio broadcast being received (step S204: NO), the control unit 101 ends the process.
When the simulcast is being performed for the FM radio broadcast being received (step S204: YES), the control unit 101 acquires the frequency of the AM radio broadcast corresponding to the simulcast based on the same program frequency table 18b. (Step S205).

Next, the control unit 101 turns off the phase diver function (step S206). That is, the control unit 101 controls the second tuner unit 121 to stop reception of the FM radio broadcast by the second tuner unit 121, and controls the switching unit 13e and the combining unit 13f to control the switching unit 13e. The output of the second radio audio signal by is stopped, and the synthesis of the radio audio signal by the synthesis unit 13f is stopped.
Next, the control unit 101 controls the second tuner unit 121 to start receiving the AM radio broadcast having the frequency acquired in step S205 (step S207). At this point, the control unit 101 maintains the state where the switching unit 13e outputs the first radio audio signal to the synthesis unit 13f.

Next, the control unit 101 determines whether or not the reception state of the second tuner unit 121 that receives AM radio broadcasting is better than the reception state of the first tuner unit 120 that receives FM radio broadcasting (step). S208).
In step S <b> 208, the control unit 101 compares the S / N ratio related to the first tuner unit 120 input from the reception state detection unit 102 with the S / N ratio related to the second tuner unit 121. Then, when the S / N ratio related to the second tuner unit 121 is larger than the S / N ratio related to the first tuner unit 120, the control unit 101 receives the AM radio broadcast when the S / N ratio is higher than that of the first tuner unit 120. It is determined that the reception state 121 is better than the reception state of the first tuner unit 120 that receives the FM radio broadcast.

  In step S208, when the reception state of the second tuner unit 121 that receives the AM radio broadcast is better than the reception state of the first tuner unit 120 that receives the FM radio broadcast (step S208: YES), the control unit 101 Controls the switching unit 13e, stops the output of the first radio audio signal by the switching unit 13e, and causes the switching unit 13e to start outputting the second radio audio signal (step S209). As a result of the processing in step S209, the radio broadcast output as sound is switched from the FM radio broadcast received by the first tuner unit 120 to the AM radio broadcast received by the second tuner unit 121.

  On the other hand, when the reception state of the second tuner unit 121 that receives the AM radio broadcast is not better than the reception state of the first tuner unit 120 that receives the FM radio broadcast in step S208 (step S208: NO), The process returns to step S208. That is, the control unit 101 monitors the reception state of the second tuner unit 121 that receives the AM radio broadcast until it becomes better than the reception state of the first tuner unit 120 that receives the FM radio broadcast.

  As a result of the above processing, when the user is receiving FM radio broadcasting with the phase diver function, even if the FM radio broadcasting is difficult to hear, the user is still receiving simultaneous broadcasting. Therefore, it is possible to continue to listen to the same program in a more easy-to-listen state, which improves user convenience.

As described above, the in-vehicle device 1 (broadcast receiving device) according to the present embodiment includes the first tuner unit 120 (first broadcast receiving unit) capable of receiving a radio broadcast (broadcast) and the first tuner unit 120. 2nd tuner unit 121 (second broadcast receiving means) capable of receiving radio broadcasts independently of each other, reception state of first tuner unit 120, and reception state detection for detecting reception state of second tuner unit 121 Unit 102 (reception state detection means). The in-vehicle device 1 receives a broadcast related to the first program broadcast by the first tuner unit 120 in the first broadcast system (AM broadcast system or FM broadcast system), and outputs the received broadcast. When the reception state detection unit 102 detects that the reception state of the first tuner unit 120 has deteriorated, the second broadcast method (FM broadcast method or AM broadcast different from the first broadcast method) If the second program having the same content as the first program is broadcasted, and if it is determined that the second program is broadcast, the second tuner unit 121 receives the second program. The control part 101 (control means) which receives the broadcast which concerns on this program is provided.
According to this configuration, the in-vehicle device 1 states that “the same program may be broadcast by a broadcasting station in the same broadcast time in the same broadcast time in both the AM broadcasting system and the FM broadcasting system. It is preferable that the vehicle-mounted device 1 has two tuners, ie, the first tuner unit 120 and the second tuner unit 121, during reception of a radio broadcast of one broadcasting system. Even if radio broadcasting is difficult to hear, if simultaneous broadcasting is being performed, it is possible to continuously output the same program in a more easy-to-listen state. Improves.

In the present embodiment, the control unit 101 causes the second tuner unit 121 to receive the broadcast related to the second program, and then receives the reception status of the first tuner unit 120 detected by the reception status detection unit 102. The second tuner unit 121 compares the reception state, and if the second tuner unit 121 has a better reception state, it stops the output of the broadcast related to the first program received by the first tuner unit 120, and The broadcast output relating to the second program received by the two tuner unit 121 is started.
According to this configuration, when both the first tuner unit 120 and the second tuner unit 121 receive radio broadcasts of the same program broadcast in different broadcasting systems, the reception state of the second tuner unit 121 is When the reception state of the first tuner unit 120 is better, the radio broadcast received by the second tuner unit 121 is output as audio, so that the user can listen to the same program continuously in a state that is easier to listen to. This can improve user convenience.

In the present embodiment, the control unit 101 causes the second tuner unit 121 to receive the broadcast related to the second program, and then receives the reception status of the first tuner unit 120 detected by the reception status detection unit 102. The reception status of the second tuner unit 121 is compared, and when the reception status of the first tuner unit 120 is better, the broadcast output related to the first program received by the first tuner unit 120 is continued.
According to this configuration, when both the first tuner unit 120 and the second tuner unit 121 receive radio broadcasts of the same program broadcast in different broadcasting systems, the reception state of the first tuner unit 120 is When the reception state of the second tuner unit 121 is better, the radio broadcast received by the first tuner unit 120 is continuously output as audio, so that the user can continue to listen to the same program in a state that is easier to hear. And the convenience of the user is improved.

In addition, the in-vehicle device 1 according to the present embodiment stores a storage unit 18 (storage) that stores information (information included in the same program frequency table 18b) regarding AM broadcast broadcasts and FM broadcast broadcasts related to common programs. Means). Based on the information stored in the storage unit 18, the control unit 101 determines whether or not the same program is being broadcast in a broadcast system different from the broadcast system related to the radio broadcast being received.
According to this configuration, based on the information stored in the storage unit 18, the control unit 101 accurately determines whether the same program is being broadcast in a broadcast system different from the broadcast system related to the radio broadcast being received. Can be determined.

Moreover, the vehicle-mounted apparatus 1 which concerns on this embodiment has a phase diver function. Then, the control unit 101 receives the first tuner unit 120 to the second tuner unit 121 by the phase diver function while receiving the FM radio broadcast related to the first program as the first broadcast system broadcast. A first radio audio signal (sound signal) based on the broadcast received by the first tuner unit 120 and a second radio audio signal based on the broadcast received by the second tuner unit 121. Are combined and output. On the other hand, when the in-vehicle device 1 detects that the reception state of the first tuner unit 120 and the reception state of the second tuner unit 121 are deteriorated by the reception state detection unit 102, the in-vehicle device 1 is an AM broadcast system different from the FM broadcast system. It is determined whether or not a second program having the same content as the first program is being broadcast, and if it is determined that the second program is being broadcast, the phase diver function is disabled and the second tuner unit 121 causes a broadcast related to the second program to be received.
According to this configuration, the in-vehicle device 1 is used when the simulcast is being performed even when the radio broadcast becomes difficult to hear during reception of the FM broadcast radio broadcast by the phase diver function. Since it is possible to continuously output the same program in a more easy-to-listen state, user convenience is improved.

Second Embodiment
Next, a second embodiment of the present invention will be described.
In the first embodiment described above, the control unit 101 creates the same program frequency table 18b based on the AM radio broadcast program guide and the FM radio broadcast program guide received from the server 400, and simulcasting is performed from the same program frequency table 18b. It was determined whether it was done.
On the other hand, the server 400 according to the present embodiment has the following functions. That is, the server 400 receives a control command (hereinafter referred to as “simult broadcast information request command”) for instructing a response request for simulcast information (described later) from an external device (including the in-vehicle device 1). . The simulcast information request command includes at least information indicating the current position of the external device, information indicating the broadcast system of the radio broadcast being received by the external device, and radio broadcast being received by the external device. And information indicating the frequency. When the server 400 receives the simulcast information request command, the server 400 identifies the broadcast area to which the position of the external device belongs based on the information indicating the current position of the external device included in the command. Next, the server 400 is based on the information indicating the broadcast system of the radio broadcast being received by the external device and the information indicating the frequency of the radio broadcast being received by the external device included in the simulcast information request command. Then, the AM broadcast station database 402 is referred to and it is determined whether or not the simulcast is being performed for the radio broadcast being received by the external device. When simulcasting is being performed, the server 400 generates simulcast information including at least information indicating a radio broadcasting system corresponding to simulcast and information indicating a radio broadcast frequency corresponding to simulcast. And respond to external devices. On the other hand, when the simulcast is not performed for the radio broadcast being received by the external device, the server 400 generates simulcast information including information indicating that at least the simulcast is not performed, and transmits the simulcast information to the external device. respond.

The control part 101 of the vehicle-mounted apparatus 1 which concerns on this embodiment does not produce | generate the same program frequency table 18b in advance. The control unit 101 controls the communication unit 19 to transmit a simulcast information request command to the server 400 when determining whether simulcasting is being performed for the radio broadcast being received, Based on the response corresponding to the command, it is determined whether or not simultaneous broadcasting is being performed.
Even if it is the above structure, the control part 101 of the vehicle-mounted apparatus 1 can discriminate | determine correctly whether the simulcast is performed about the radio broadcast in reception. In addition, when simulcasting is being performed, the control unit 101 can accurately acquire a radio broadcasting system and frequency corresponding to simulcast.

As described above, the control unit 101 according to the present embodiment allows the server 400 (external device) to transmit the second content having the same content as the first program in the second broadcast method different from the first broadcast method. The second program having the same content as the first program is broadcast in a second broadcasting system different from the first broadcasting system based on a response to the inquiry. It is determined whether or not.
According to this configuration, the in-vehicle device 1 uses the function of the server 400 to accurately match the second content having the same content as the first program in the second broadcast method different from the first broadcast method. Whether or not a program is being broadcast can be determined.

<Third Embodiment>
Next, a third embodiment will be described with reference to the drawings. The in-vehicle device 1 according to the first embodiment described above has a phase diver function, and can enable the phase diver function when receiving FM radio broadcast.
On the other hand, the in-vehicle device 1 according to the present embodiment has a scan diver function in place of the phase diver function for FM radio broadcast reception.
That is, when one channel of FM radio broadcasting is selected by the user, the control unit 101 transmits FM broadcast waves having the frequency of the one channel to both the first tuner unit 120 and the second tuner unit 121. To receive. In addition, the control unit 101 controls the switching unit 13e to selectively select the radio audio signal corresponding to the better reception state among the first tuner unit 120 and the second tuner unit 121 to the synthesis unit 13f. Output. As a result, the in-vehicle device 1 can output sound based on the radio broadcast received by the tuner having the better reception state out of the first tuner unit 120 and the second tuner unit 121. Compared with the case where FM radio broadcast is received by any one of the tuner 120 and the second tuner unit 121, the possibility of a state in which the radio broadcast is output in an easy-to-listen state can be increased.
The scan diver function can also be effective for reception of AM radio broadcasts. When the AM radio broadcast is received by the scan diver function and when the FM radio broadcast is received by the scan diver function, the operation of the in-vehicle device 1 is substantially the same. Therefore, when the AM radio broadcast is received by the scan diver function. The operation of the in-vehicle device 1 is omitted.

FIG. 5 is a flowchart showing the operation of the in-vehicle apparatus 1 when receiving and outputting an FM broadcast radio broadcast.
At the start of the flowchart in FIG. 5, the in-vehicle device 1 is in the following state. That is, the in-vehicle device 1 is in a state where the scan diver function is enabled. For this reason, at the start of the flowchart of FIG. 5, both the first tuner unit 120 and the second tuner unit 121 are in a state in which FM radio broadcasting of the same frequency is received and the reception state is good. The sound based on the radio audio signal based on the FM radio broadcast received by the other tuner is output.

The control unit 101 controls the reception state detection unit 102, and among the first tuner unit 120 and the second tuner unit 121, a tuner that is a target for outputting sound based on a radio audio signal (hereinafter, “output target tuner”). It is monitored whether or not the reception state of "is deteriorated" (step S301). In step S301, based on the input from the reception state detection unit 102, the control unit 101 determines that the reception state of the tuner has deteriorated when the S / N ratio of the output target tuner falls below a predetermined threshold.
Here, when the scan diver function is valid, if the reception state of the output target tuner deteriorates, the radio broadcast that is output as audio becomes difficult to hear for the user. Based on this, in step S301, the control unit 101 determines whether or not the radio broadcast that is output as sound is difficult for the user to hear. In addition, when the scan diver function is valid, the predetermined threshold is less likely to be heard by the user when the S / N ratio falls below the predetermined threshold. Appropriately determined.

  If it is determined in step S301 that the reception state of the output target tuner has not deteriorated (step S301: NO), the process returns to step S301.

  If it is determined in step S301 that the reception state of the output target tuner has deteriorated (step S301: YES), the control unit 101 specifies the current location of the vehicle based on the input from the GPS unit 16 (step S302). .

Next, the control unit 101 refers to the same program frequency table 18b (step S303).
Next, based on the same program frequency table 18b referred to, the control unit 101 determines whether or not simulcasting is being performed for the FM radio broadcast being received (in the same time zone in the broadcast area to which the vehicle position belongs). It is determined whether or not there is an AM radio broadcast that broadcasts the same program (step S304).

When the simulcast is not performed for the FM radio broadcast being received (step S304: NO), the control unit 101 ends the process.
When the simulcast is being performed for the FM radio broadcast being received (step S304: YES), the control unit 101 acquires the frequency of the AM radio broadcast corresponding to the simulcast based on the same program frequency table 18b. (Step S305).

Next, the control unit 101 turns off the scan diver function (step S306). That is, the control unit 101 stops reception of FM radio broadcast by a tuner different from the output target tuner (hereinafter referred to as “output non-target tuner”).
Next, the control unit 101 controls the output non-target tuner to start reception of the AM radio broadcast of the frequency acquired in step S305 (step S307). At this time, the control unit 101 maintains the state where the switching unit 13e outputs the radio audio signal corresponding to the output target tuner to the synthesis unit 13f.

Next, the control unit 101 monitors whether or not the reception state of the output non-target tuner that receives the AM radio broadcast is better than the reception state of the output target tuner that receives the FM radio broadcast (step S308). .
In step S308, the control unit 101 compares the S / N ratio related to the first tuner unit 120 input from the reception state detection unit 102 with the S / N ratio related to the second tuner unit 121, and determines the comparison result. Based on this, processing is executed.

  In step S308, when the reception state of the output non-target tuner that receives the AM radio broadcast is better than the reception state of the output target tuner that receives the FM radio broadcast (step S308: YES), the control unit 101 Then, the switching unit 13e is controlled to switch the radio audio signal output from the switching unit 13e (step S309). As a result of the processing in step S309, the radio broadcast output as audio is switched from the FM radio broadcast received by the output target tuner to the AM radio broadcast received by the output non-target tuner.

  On the other hand, in step S308, when the reception state of the output non-target tuner that receives the AM radio broadcast is not better than the reception state of the output target tuner that receives the FM radio broadcast (step S308: NO), the process proceeds to step S308. Return to S308. That is, the control unit 101 monitors the reception state of the output non-target tuner that receives the AM radio broadcast until it becomes better than the reception state of the output target tuner that receives the FM radio broadcast.

  As a result of the above processing, when the user receives FM radio broadcast with the scan diver function, even if the FM radio broadcast is difficult to hear, the user is still receiving simulcast. Therefore, it is possible to continue to listen to the same program in a more easy-to-listen state, which improves user convenience.

As described above, the in-vehicle device 1 according to the present embodiment has a scan diver function. Then, while the first tuner unit 120 is receiving the FM broadcast system broadcast related to the first program, the control unit 101 causes the second tuner unit 121 to transmit the FM broadcast system related to the first program to the second tuner unit 121. The broadcast is received, the reception state of the first tuner unit 120 detected by the reception state detection unit 102 is compared with the reception state of the second tuner unit 121, and the broadcast received by the tuner with the better reception state is output. To do. On the other hand, when the control unit 101 detects that the reception state of the tuner with the better reception state is deteriorated by the reception state detection unit 102, the control unit 101 is the same as the first program in the AM broadcast system different from the FM broadcast system. If it is determined whether or not the second program of the content is being broadcast, and it is determined that the second program is being broadcast, the scan diver function is disabled, and the broadcast receiving means having a poor reception state A broadcast related to the second program is received.
According to this configuration, the in-vehicle device 1 is used when the simulcast is being performed even when the radio broadcast becomes difficult to hear during reception of the FM broadcast radio broadcast by the scan diver function. Since it is possible to continuously output the same program in a more easy-to-listen state, user convenience is improved.

<Fourth embodiment>
Next, a fourth embodiment will be described with reference to the drawings. The in-vehicle device 1 according to the first embodiment described above has a phase diver function, and can enable the phase diver function when receiving FM radio broadcast. Moreover, the vehicle-mounted apparatus 1 which concerns on 3rd Embodiment mentioned above has a scan diver function, and it was possible to validate a scan diver function at the time of reception of FM radio broadcasting.
On the other hand, the in-vehicle device 1 according to the present embodiment does not have a phase diver function and a scan diver function. For this reason, when receiving the FM radio broadcast, the in-vehicle device 1 receives the FM radio broadcast of the channel selected by the user by the first tuner unit 120 and outputs the sound based on the received FM radio broadcast.

FIG. 6 is a flowchart showing the operation of the in-vehicle apparatus 1 when receiving and outputting an FM broadcast radio broadcast.
At the start of the flowchart of FIG. 6, the in-vehicle device 1 is in the following state. That is, the in-vehicle device 1 is in a state where the first tuner unit 120 receives the FM radio broadcast while the second tuner unit 121 does not receive the FM radio broadcast.

  As shown in the flowchart of FIG. 6, the control unit 101 monitors whether or not the reception state of the first tuner unit 120 has deteriorated based on the input from the reception state detection unit 102 (step S401). In step S401, based on the input from the reception state detection unit 102, the control unit 101 determines that the reception state of the tuner has deteriorated when the S / N ratio of the first tuner unit 120 falls below a predetermined threshold. To do.

  If it is determined in step S401 that the reception state of the first tuner unit 120 has not deteriorated (step S401: NO), the process returns to step S401.

  In step S401, when it is determined that the reception state of the first tuner unit 120 has deteriorated (step S401: YES), the control unit 101 specifies the current location of the vehicle based on the input from the GPS unit 16 or the like (step S401). S402).

Next, the control unit 101 refers to the same program frequency table 18b (step S403).
Next, based on the same program frequency table 18b referred to, the control unit 101 determines whether or not simulcasting is being performed for the FM radio broadcast being received (in the same time zone in the broadcast area to which the vehicle position belongs). It is determined whether there is an AM radio broadcast that broadcasts the same program (step S404).

When the simulcast is not performed for the FM radio broadcast being received (step S404: NO), the control unit 101 ends the process.
When the simulcast is being performed for the FM radio broadcast being received (step S404: YES), the control unit 101 acquires the frequency of the AM radio broadcast corresponding to the simulcast based on the same program frequency table 18b. (Step S405).

  Next, the control unit 101 controls the second tuner unit 121 to start reception of the FM radio broadcast having the frequency acquired in step S405 (step S406). At this point, the control unit 101 maintains the state where the switching unit 13e outputs the first radio audio signal to the synthesis unit 13f.

Next, the control unit 101 monitors whether or not the reception state of the second tuner unit 121 that receives the AM radio broadcast is better than the reception state of the first tuner unit 120 that receives the FM radio broadcast ( Step S407).
In step S407, the control unit 101 compares the S / N ratio related to the first tuner unit 120 input from the reception state detection unit 102 with the S / N ratio related to the second tuner unit 121, and the comparison result is obtained. Based on this, processing is executed.

  In step S407, when the reception state of the second tuner unit 121 that receives the AM radio broadcast is better than the reception state of the first tuner unit 120 that receives the FM radio broadcast (step S407: YES), control is performed. The unit 101 controls the switching unit 13e to switch the radio audio signal output from the switching unit 13e (step S408). As a result of the processing in step S408, the radio broadcast output as audio is switched from the FM radio broadcast received by the first tuner unit 120 to the AM radio broadcast received by the second tuner unit 121.

  On the other hand, when the reception state of the second tuner unit 121 that receives the AM radio broadcast is not better than the reception state of the first tuner unit 120 that receives the FM radio broadcast in step S407 (step S407: NO), The process returns to step S407. That is, the control unit 101 monitors the reception state of the second tuner unit 121 that receives the AM radio broadcast until it becomes better than the reception state of the first tuner unit 120 that receives the FM radio broadcast.

  As a result of the above processing, when the user receives the FM radio broadcast in a state where the scan diver function and the phase diver function are not effective, the FM radio broadcast becomes difficult to hear. However, when simulcasting is being performed, it is possible to continuously listen to the same program in a more easy-to-listen state, which improves user convenience.

  The above-described embodiments are merely illustrative of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

  Further, for example, in the above-described embodiment, the broadcast receiving apparatus is exemplified as the in-vehicle apparatus 1 mounted on the vehicle, but the form of the broadcast receiving apparatus is arbitrary, and for example, a portable apparatus carried by a pedestrian may be used. . That is, the present invention can be widely applied to a broadcast receiving apparatus having two tuners.

  Moreover, although the vehicle-mounted apparatus 1 was mounted in the vehicle, the object mounted with the vehicle-mounted apparatus 1 in the present invention is not limited to an automobile, but may be a motorcycle, a bicycle, an aircraft, a ship, or the like.

  In addition, for example, when the above-described control method of the in-vehicle device 1 is realized using a computer included in the in-vehicle device 1, the program executed by the computer to realize the control method according to the present invention, It is also possible to configure in the form of a recording medium recorded so as to be readable by a computer or a transmission medium for transmitting this program. As the recording medium, a magnetic or optical recording medium or a semiconductor memory device can be used. Specifically, flexible disk, HDD (Hard Disk Drive), CD-ROM (Compact Disk Read Only Memory), DVD (Digital Versatile Disk), Blu-ray (registered trademark) Disc, magneto-optical disk, flash memory, card Examples thereof include portable or fixed recording media such as mold recording media. The recording medium may be a non-volatile storage device such as a ROM (Read Only Memory) or an HDD that is an internal storage device included in the in-vehicle device 1.

1 In-vehicle device (broadcast receiving device)
16 GPS unit (position detection means)
18a Same program frequency table (storage means)
19 Communication Department (Communication means)
101 Control unit (control means)
102 Reception state detection unit (reception state detection means)
120 tuner section (first broadcast receiving means)
121 Tuner (second broadcast receiving means)

Claims (8)

First broadcast receiving means capable of receiving a broadcast;
Second broadcast receiving means capable of receiving a broadcast independently of the first broadcast receiving means;
A reception state detection unit that detects a reception state of the first broadcast reception unit and a reception state of the second broadcast reception unit;
When the broadcast related to the first program broadcast by the first broadcast receiving means is received by the first broadcast receiving means and the received broadcast is output, the reception status detecting means outputs the first broadcast. If it is detected that the reception state of the receiving means has deteriorated, whether or not a second program having the same content as the first program is being broadcast in a second broadcasting system different from the first broadcasting system. Control means for causing the second broadcast receiving means to receive the broadcast related to the second program when it is determined that the second program is being broadcast;
A broadcast receiving apparatus comprising: The control means includes
After the second broadcast receiving means receives the broadcast related to the second program, the reception status of the first broadcast receiving means detected by the reception status detecting means, and the second broadcast reception Comparing the reception state of the means, and if the second broadcast receiving means is in a better reception state, stop the output of the broadcast related to the first program received by the first broadcast receiving means, The broadcast receiving apparatus according to claim 1, wherein output of the broadcast related to the second program received by the second broadcast receiving unit is started. The control means includes
After the second broadcast receiving means receives the broadcast related to the second program, the reception status of the first broadcast receiving means detected by the reception status detecting means, and the second broadcast reception Comparing the reception status of the means, and if the reception status of the first broadcast receiving means is better, the output of the broadcast related to the first program received by the first broadcast receiving means is continued. The broadcast receiving apparatus according to claim 1 or 2, characterized in that: Storage means for storing information relating to the broadcast of the first broadcast system and the broadcast of the second broadcast system related to a common program;
The control means includes
Whether the second program having the same content as the first program is being broadcast in the second broadcasting system different from the first broadcasting system, based on the information stored in the storage means The broadcast receiving device according to any one of claims 1 to 3, wherein the broadcast receiving device is discriminated. A communication means for communicating with an external device;
The control means includes
Whether or not the second program having the same content as the first program is broadcast by the communication means to the external device in the second broadcasting system different from the first broadcasting system. Based on the inquiry and the response to the inquiry, it is determined whether or not the second program having the same content as the first program is being broadcast in the second broadcasting system different from the first broadcasting system. The broadcast receiving apparatus according to any one of claims 1 to 3, wherein the broadcast receiving apparatus is provided. It has a phase diver function,
The control means includes
While receiving the FM broadcast related to the first program as the broadcast of the first broadcast method by the first broadcast receiving means, the first broadcast receiving means causes the first broadcast receiving means to send the first broadcast to the second broadcast receiving means. While receiving the FM broadcast related to the program, the audio signal based on the broadcast received by the first broadcast receiving means and the audio signal based on the broadcast received by the second broadcast receiving means are synthesized and output. ,
When the reception state detection unit detects that the reception state of the first broadcast reception unit and the reception state of the second broadcast reception unit have deteriorated, the second broadcast different from the first broadcast system The method determines whether or not the second program having the same content as the first program is broadcast, and if it is determined that the second program is broadcast, the phase diver function is disabled. The broadcast receiving apparatus according to claim 1, wherein the second broadcast receiving unit receives the broadcast related to the second program. It has a scan diver function,
The control means includes
While the first broadcast receiving means is receiving the broadcast of the first broadcast method related to the first program, the second broadcast receiving means causes the second broadcast receiving means to transmit the first program related to the first program. A first broadcast system broadcast is received, the reception state of the first broadcast reception unit detected by the reception state detection unit is compared with the reception state of the second broadcast reception unit, While outputting the broadcast received by the better broadcast receiving means,
When it is detected by the reception state detection means that the reception state of the broadcast reception means having a better reception state has deteriorated, the second broadcast method different from the first broadcast method, and the first program If it is determined whether or not the second program having the same content is being broadcast, and if it is determined that the second program is being broadcast, the scan diver function is disabled and the reception status is worse The broadcast receiving apparatus according to any one of claims 1 to 5, wherein the broadcast receiving unit receives a broadcast related to the second program. Receiving a broadcast related to the first program broadcast by the first broadcast system by the first broadcast receiving means capable of receiving the broadcast, and outputting the received broadcast;
While outputting the broadcast related to the first program, the reception status of the first broadcast receiving means is detected,
When it is detected that the reception state of the first broadcast receiving means has deteriorated, a second program having the same content as the first program is transmitted in a second broadcast system different from the first broadcast system. To determine if it ’s being broadcast,
When it is determined that the second program is being broadcast, the second broadcast receiving unit capable of receiving the broadcast independently of the first broadcast receiving unit receives the broadcast related to the second program. A broadcast receiving method characterized by:

Images