JP7237140B2 - Broadcast receiving device and broadcast receiving method - Google Patents

Description

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

A broadcast receiver installed in a vehicle adjusts the setting of the reception operation according to various environments such as the radio wave environment, the vehicle type, and the characteristics of the antenna. For example, the broadcast receiving apparatus described in Patent Document 1 detects identification data indicating a genre such as music superimposed on an FM broadcast signal, and uses control information corresponding to the detected identification data for each music genre. It changed the reception behavior.

JP-A-2001-60923

The broadcast receiver described in Patent Literature 1 cannot perform a reception operation suitable for a music genre when control information corresponding to identification data does not exist. Further, the broadcast receiving apparatus described in Patent Document 1 only changes the control information according to the music genre, and does not update the control information as needed according to changes in the radio wave environment or the like.

As described above, the conventional broadcast receiving apparatus has a problem that the control information for the reception operation is predetermined for each reception condition, and cannot cope with the reception conditions for which the control information is not defined. Further, the conventional broadcast receiving apparatus has a problem that the receiving operation cannot be changed at any time according to the change of the receiving conditions.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a broadcast receiving apparatus capable of performing receiving operations in accordance with various receiving conditions.

A broadcast receiving apparatus according to the present invention includes a receiving unit that performs a broadcast wave receiving operation using control information and outputs broadcast wave receiving conditions and reception performance results of the receiving operation, and control information and reception performance results for the receiving conditions. , a reception operation control unit that sets the control information updated by the optimization processing unit to the receiving unit , a passenger, frequency characteristics, and vehicle type a situation determination unit that determines at least one current situation , and the optimization processing unit outputs control information when the situation regarding at least one of the passenger, frequency characteristics, and vehicle type determined by the situation determination unit changes. is updated .

According to the present invention, it is possible to carry out reception operations in accordance with various reception conditions.

1 is a block diagram showing a configuration example of a broadcast receiving apparatus according to Embodiment 1; FIG. 2 is a block diagram showing a configuration example of an analog broadcast receiving unit in FIG. 1; FIG. 4 is a flowchart showing an operation example of the broadcast receiving device according to Embodiment 1; 4 is a diagram showing examples of various information used in the broadcast receiving device according to Embodiment 1; FIG. 2 is a block diagram showing a modification of the broadcast receiving device according to Embodiment 1; FIG. 6 is a block diagram showing a configuration example of a digital broadcast receiving unit in FIG. 5; FIG. FIG. 10 is a block diagram showing a configuration example of a broadcast receiving apparatus according to Embodiment 2; FIG. 10 is a diagram showing examples of various information used in the broadcast receiving device according to Embodiment 2; FIG. 9 is a flow chart showing an operation example of the broadcast receiving device according to Embodiment 2; FIG. 10 is a diagram showing examples of various information used when the broadcast receiving apparatus according to Embodiment 2 is configured to receive digital television broadcast waves; It is a figure which shows an example of the hardware constitutions of the broadcast receiving apparatus which concerns on each embodiment. It is a figure which shows another example of the hardware configuration of the broadcast receiving apparatus which concerns on each embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to describe the present invention in more detail, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1.
FIG. 1 is a block diagram showing a configuration example of a broadcast receiving apparatus 10 according to Embodiment 1. As shown in FIG. The broadcast receiver 10 is mounted on the vehicle 1 and receives analog broadcast waves. Analog broadcast waves include at least one of AM radio broadcast waves and FM radio broadcast waves. This broadcast receiver 10 includes an analog broadcast receiver 11 , an optimization processor 12 , and a reception operation controller 13 . Note that the broadcast receiving apparatus 10 may include a Fourier transform section 15 as will be described later.

FIG. 2 is a block diagram showing a configuration example of the analog broadcast receiving section 11. As shown in FIG. The analog broadcast receiving unit 11 includes a tuner unit 111 that receives analog broadcast waves of any frequency, and a demodulation unit 112 that demodulates the analog broadcast waves received by the tuner unit 111 . The demodulation unit 112 includes an AD (Analog Digital) conversion unit 113 that converts the analog broadcast wave received by the tuner unit 111 into a digital signal, a noise suppression unit 114 that suppresses noise contained in the digital signal, and a digital signal after noise suppression. A reception status detector 115 detects the reception status of the analog broadcast wave using the signal. Although illustration is omitted, the digital signal demodulated by the demodulator 112 is output as sound from a speaker installed in the vehicle 1 .

The reception status detected by the reception status detection unit 115 includes received power, multipath, SN (Signal to Noise ratio), SINAD (Signal to Noise And Distortion ratio), and the like. The reception status detector 115 may detect the reception status using a well-known technique. Reception status detector 115 outputs the detected reception status to optimization processor 12 .

In addition, the analog broadcast receiving section 11 performs an analog broadcast wave receiving operation according to control information from the receiving operation control section 13 . The control information includes information on at least one of the filter or automatic gain control of the tuner section 111, or the high-cut control, volume control, or stereo/monaural ratio control (stereo blend ratio) of the demodulator section 112. For example, the high-cut control performed by the noise suppression unit 114 is control for reducing noise by attenuating high frequencies with a filter when noise occurs. Control information related to this high-cut control is, for example, filter coefficients.

The optimization processing unit 12 uses the analog broadcast wave reception status detected by the reception status detection unit 115 and the control information set in the analog broadcast reception unit 11 via the reception operation control unit 13 to optimize control information. to learn. For example, among the control information, filter coefficients for high-cut control performed by the noise suppression unit 114 are taken as an example. Also, the reception power included in the reception status is set as the reception condition, and the SN included in this reception status is set as the reception performance result. In this example, the optimization processing unit 12 calculates the relationship between control information (that is, filter coefficients for high-cut control) for reception conditions (that is, received power) and reception performance results (that is, SN) using machine learning with teacher data. , machine learning without supervised data, or AI (Artificial Intelligence) such as deep learning, and updates the high-cut control filter coefficient, which is the control information, so that the SN, which is the reception performance result, becomes the optimum value. The optimization processor 12 outputs the updated control information to the reception operation controller 13 . It is assumed that the items used for the reception condition and the items used for the reception performance result in the reception status are predetermined for the optimization processing unit 12 .

The reception operation control section 13 sets the control information updated by the optimization processing section 12 to the analog broadcast reception section 11 . The analog broadcast receiver 11 performs an analog broadcast wave reception operation using the control information set by the reception operation controller 13 and outputs the reception status during the reception operation to the optimization processor 12 .

FIG. 3 is a flow chart showing an operation example of the broadcast receiving device 10 according to the first embodiment. For example, when the accessory power supply of the vehicle 1 is turned on, the broadcast receiver 10 starts the operation shown in the flowchart of FIG. 3, and ends the operation when the accessory power supply is turned off.

In step ST<b>11 , the reception operation control section 13 sets, for the analog broadcast reception section 11 , control information determined in advance by, for example, the manufacturer of the broadcast reception device 10 .
In step ST12, the analog broadcast receiver 11 uses the control information set by the reception operation controller 13 to perform the analog broadcast wave reception operation. Also, the analog broadcast receiver 11 detects the reception status during this reception operation and outputs it to the optimization processor 12 .
In step ST13, the optimization processing unit 12 performs optimization processing using the reception status acquired from the analog broadcast reception unit 11 and the control information set in the analog broadcast reception unit 11, and updates the control information. .
In the next step ST11 , the reception operation control section 13 sets the control information updated by the optimization processing section 12 to the analog broadcast reception section 11 .

FIG. 4 is a diagram showing examples of various information used in the broadcast receiving apparatus 10 according to the first embodiment.
For example, if the analog broadcast receiver 11 is receiving an analog broadcast wave with a frequency of "80.2" and the control information "a" is set for this analog broadcast receiver 11, the received power is "60". , SN is "30". Also, assume that when the control information "b" is set for the analog broadcast receiving unit 11 while receiving the same frequency "80.2", the reception power is "60" and the SN is "20". The optimization processing unit 12 sets the control information "a", which has a better SN, which is the reception performance result, as the optimum value for the frequency "80.2". The reception operation control unit 13 sets the control information “a” to the analog broadcast reception unit 11 when the analog broadcast reception unit 11 receives the frequency “80.2” next time.

Here, as an example, the reception condition is reception power and the reception performance result is SN. or SN), and one or more reception performance results including the SN (eg, SNAID) can be used to learn and update one or more control information, including filter coefficients. Further, the optimization processing unit 12 may use the FFT result of the fast Fourier transform (FFT) of the analog broadcast wave signal by the Fourier transform unit 15 as the reception performance result. For example, the high-cut control by the noise suppression unit 114 of the analog broadcast receiving unit 11 has a trade-off relationship in that while noise is reduced, the spread of sound quality is also lost due to the loss of high-frequency components. Therefore, the optimization processing unit 12 uses the FFT result of the Fourier transform unit 15 to evaluate the perceptual performance of the high-cut control or the like.

As described above, the broadcast receiver 10 according to Embodiment 1 includes the analog broadcast receiver 11 , the optimization processor 12 and the reception operation controller 13 . The analog broadcast receiving unit 11 performs an analog broadcast wave reception operation using the control information, and outputs the reception conditions of the analog broadcast wave and the reception performance result of the reception operation. The optimization processing unit 12 learns the relationship between the control information for the reception condition and the reception performance result and updates the control information. The reception operation control section 13 sets the control information updated by the optimization processing section 12 to the analog broadcast reception section 11 . With this configuration, the broadcast receiving apparatus 10 can perform reception operations in accordance with various reception conditions that depend on the radio wave environment and the like.

Although the broadcast receiving apparatus 10 shown in FIG. 1 is configured to receive analog broadcast waves, it may be configured to receive digital broadcast waves. FIG. 5 is a block diagram showing a modification of broadcast receiving apparatus 10 according to Embodiment 1. As shown in FIG. FIG. 6 is a block diagram showing a configuration example of the digital broadcast receiving section 16. As shown in FIG. A digital broadcast wave is a digital radio broadcast wave or a digital television broadcast wave.

The digital broadcast receiving unit 16 includes a tuner unit 161 that receives digital broadcast waves of any frequency, and a demodulator unit 162 that demodulates the digital broadcast waves received by the tuner unit 161 . The demodulation unit 162 includes an AD conversion unit 163 that converts the digital broadcast wave received by the tuner unit 161 into a digital signal, a Fourier transform unit 164 that performs FFT processing on the digital signal, and an orthogonal frequency using the FFT result of the Fourier transform unit 164. It has an OFDM demodulator 165 that performs OFDM demodulation processing, and a reception status detector 166 that detects the reception status of the digital broadcast wave using the demodulated digital signal. Since digital broadcast receiving section 16 has Fourier transform section 164 therein, Fourier transform section 15 shown in FIG. 1 is not required. Although illustration is omitted, the digital signal demodulated by the OFDM demodulator 165 is output as sound from a speaker installed in the vehicle 1 or displayed on a display installed in the vehicle 1 .

The reception status detected by the reception status detection unit 166 is reception power, PER (Packet Error Rate), CN (Carrier to Noise ratio), or the like. The reception status detector 166 may detect the reception status using a well-known technique. The reception status detector 166 outputs the detected reception status to the optimization processor 12 . The received power, PER, CN, etc. are used as reception conditions or reception performance results in the optimization processing unit 12 . The Fourier transform unit 164 also outputs the FFT result to the optimization processing unit 12 . The FFT result is used as the reception performance result in the optimization processing section 12 .

The digital broadcast receiving unit 16 receives digital broadcast waves according to the control information from the reception operation control unit 13 . If the digital broadcast receiving section 16 receives digital radio broadcast waves, the control information includes information on at least one of the filter of the tuner section 161 and automatic gain control. When the digital broadcast receiving unit 16 receives digital television broadcast waves, the control information is the filter or automatic gain control of the tuner unit 161, or the threshold value for switching between one-segment broadcasting and full-segment broadcasting of the demodulating unit 162. contains information about at least one of

The optimization processing unit 12 and the reception operation control unit 13 in the broadcast receiving device 10 configured as shown in FIGS. and the same processing as that of the reception operation control unit 13 may be performed. Further, the broadcast receiver 10 may be configured to include two of a digital broadcast receiver 16 that receives digital radio broadcast waves and a digital broadcast receiver 16 that receives digital television broadcast waves.

The broadcast receiver 10 may be configured to include both the analog broadcast receiver 11 and the digital broadcast receiver 16 . In this configuration, the optimization processing section 12 may perform optimization processing separately for the control information for the analog broadcast reception section 11 and the control information for the digital broadcast reception section 16 .

Embodiment 2.
FIG. 7 is a block diagram showing a configuration example of the broadcast receiving apparatus 10 according to Embodiment 2. As shown in FIG. Broadcast receiving apparatus 10 according to Embodiment 2 is obtained by adding control information storage unit 20, situation determining unit 21, and program music determining unit 22 to broadcast receiving apparatus 10 according to Embodiment 1 shown in FIG. configuration. The vehicle 1 is also equipped with a high-accuracy locator 2 , a vehicle position determination unit 3 , an exterior camera 4 , a surrounding situation determination unit 5 , an interior camera 6 , a passenger determination unit 7 , and a communication device 8 . A server device 30 exists outside the vehicle 1 . In FIG. 7, parts that are the same as or correspond to those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

Contents of analog broadcast waves are pops, classical music, talks, and the like. For example, in the case of pop music, there is a signal up to the high frequency range, so if the effect of the high cut control by the noise suppressor 114 is increased when noise occurs, the breadth of the sound quality is lost. , even if the effect of high-cut control is increased compared to pop music, the effect on sound quality is small. Thus, it is preferable to use different control information for each content for high-cut control. In addition, the audible preferences such as "emphasis on sound quality over noise reduction" or "emphasis on noise reduction over sound quality" differ from passenger to passenger. Therefore, the broadcast receiving apparatus 10 according to Embodiment 2 performs an analog broadcast wave receiving operation using control information corresponding to the situation of the content and passengers.

The high-precision locator 2 receives signals from, for example, GPS (Global Positioning System) satellites. The vehicle position determination unit 3 uses the signal received by the high-precision locator 2 to determine the position (for example, latitude and longitude) of the vehicle 1 . The vehicle position determination unit 3 outputs information indicating the determined position of the vehicle 1 (hereinafter referred to as “position information”) to the situation determination unit 21 .

The vehicle exterior camera 4 images the surroundings of the vehicle 1 . The vehicle exterior camera 4 is one or more cameras such as a front camera or a side camera. The surrounding situation determination unit 5 determines the surrounding situation of the vehicle 1 using the image captured by the exterior camera 4 . The situation around the vehicle 1 is, for example, the presence or absence of obstacles such as trucks existing around the vehicle 1 that may affect the radio wave environment. The surrounding situation determining section 5 outputs information indicating the determined surrounding situation of the vehicle 1 (hereinafter referred to as “surrounding situation information”) to the situation determining section 21 .

An in-vehicle camera 6 captures an image of a passenger on board the vehicle 1 . The in-vehicle camera 6 is one or more cameras such as a DMS (Driver Monitoring System) camera that monitors the driver's condition. The passenger discrimination unit 7 compares the pre-registered passenger image with the image captured by the in-vehicle camera 6 to discriminate the passenger of the vehicle 1 . The passenger determination unit 7 outputs information indicating the determined passenger (hereinafter referred to as “passenger information”) to the situation determination unit 21 .
Moreover, in recent years, a display and a speaker are provided for each seat of the vehicle 1, and different contents can be viewed by each passenger. In that case, the passenger discrimination section 7 may discriminate a passenger for each seat.

The communication device 8 communicates with a server device 30 located outside the vehicle 1 via the Internet. The communication device 8 may be a smart phone, a mobile phone, or the like, or may be a communication device incorporated in a car navigation device or the like. The server device 30 stores, for example, information indicating the content of a program being broadcast or the genre of music (hereinafter referred to as "program music information"). The communication device 8 acquires program music information from the server device 30 on the Internet and outputs it to the program music determination section 22 . The program music determination unit 22 uses the program music information to determine the content of the analog broadcast wave being received by the analog broadcast reception unit 11 . The program music determination section 22 outputs the determined content to the situation determination section 21 .

The program music determination unit 22 may use the FFT result from the Fourier transform unit 15 instead of the content to determine the frequency characteristics of the analog broadcast wave being received by the analog broadcast reception unit 11 . The program music determination section 22 outputs the determined frequency characteristics to the situation determination section 21 .

The situation determination unit 21 receives the position information from the vehicle position determination unit 3, the surrounding situation information from the surrounding situation determination unit 5, the passenger information from the passenger determination unit 7, or the content from the program music determination unit 22, Alternatively, at least one of the frequency characteristics is used to determine the current situation. Also, the situation determination unit 21 may add vehicle type information of the vehicle 1 to the current situation. The situation determination unit 21 outputs the determined current situation to the optimization processing unit 12 . In addition, the situation determination unit 21 may cause the control information storage unit 20 to store the determined current situation.

The optimization processing unit 12 updates the control information so as to match the current situation determined by the situation determination unit 21 and outputs the updated control information to the reception operation control unit 13 . In addition, the optimization processing unit 12 may store the updated control information in the control information storage unit 20 in association with the reception condition, situation, and reception performance result used for the update. After updating the control information for each situation and storing it in the control information storage unit 20 , the optimization processing unit 12 may read the control information corresponding to the situation and output it to the reception operation control unit 13 .
Further, when the manufacturer or the like of the broadcast receiving device 10 stores the control information for each situation in the control information storage unit 20 in advance, the optimization processing unit 12 determines the current state determined by the situation determination unit 21. A situation that is the same as or similar to the situation and its control information may be read out and output to the reception operation control section 13 .

The reception operation control section 13 sets the control information updated by the optimization processing section 12 to the analog broadcast reception section 11 .

FIG. 8 is a diagram showing examples of various information used in the broadcast receiving apparatus 10 according to the second embodiment. In the example of FIG. 8, the control information storage unit 20 stores the frequency, received power, and multipath being received by the analog broadcast receiver 11 as the reception conditions output by the analog broadcast receiver 11 . Further, the position, content, vehicle type, and passenger are stored as the situation determined by the situation determination unit 21 . Also, SN is stored as the reception performance result output by the analog broadcast receiver 11 .

Further, the control information storage unit 20 stores in advance control information corresponding to the preference of the passenger. Such control information is stored in advance. On the other hand, control information that increases the effect of high-cut control is stored in advance for a passenger who puts more emphasis on noise removal than sound quality.

FIG. 9 is a flow chart showing an operation example of the broadcast receiving apparatus 10 according to the second embodiment. For example, when the accessory power supply of the vehicle 1 is turned on, the broadcast receiver 10 starts the operation shown in the flowchart of FIG. 9, and ends the operation when the accessory power supply is turned off.
Note that when a display and a speaker are provided for each seat of the vehicle 1, the broadcast receiving device 10 may perform the operation shown in the flowchart of FIG. 9 for each seat.

In step ST<b>21 , the situation determination section 21 reads control information corresponding to the passenger identified by the passenger identification section 7 from the control information storage section 20 and outputs the control information to the optimization processing section 12 . The optimization processor 12 outputs this control information to the reception operation controller 13 . The reception operation control section 13 sets this control information for the analog broadcast reception section 11 . The analog broadcast receiving section 11 performs an analog broadcast wave receiving operation according to this control information. Thereby, the broadcast receiving device 10 can perform the receiving operation according to the preference of the passenger.

In step ST22, the situation determination unit 21 determines whether the content or frequency characteristics of the analog broadcast wave being received by the analog broadcast reception unit 11 has changed, based on the determination result of the content or frequency characteristics from the program music determination unit 22. judge. If the content or frequency characteristics have changed (“YES” in step ST22), the optimization processing unit 12 updates the control information in accordance with the changed content or frequency characteristics, and sends the updated control information to the reception operation control unit 13. to the analog broadcast receiving section 11 (step ST23). On the other hand, if the content and frequency characteristics have not changed (step ST22 "NO"), the process proceeds to step ST24.

In step ST23, if the control information storage unit 20 stores control information corresponding to content or frequency characteristics that are the same as or similar to the content or frequency characteristics after the change, the optimization processing unit 12 determines that the same or similar content Alternatively, control information corresponding to frequency characteristics may be read from the control information storage unit 20 . The control information stored in the control information storage unit 20 may have been learned and stored by the optimization processing unit 12 in the past, or may be stored in the control information storage unit 20 by the manufacturer of the broadcast receiving device 10 or the like. It may be set in advance. Further, as in the first embodiment, the optimization processing unit 12 may learn control information for content or frequency characteristics after change based on the reception conditions and reception performance results from the analog broadcast reception unit 11. good. For example, the optimization processing unit 12 updates the control information so that the effect of the high-cut control is reduced for content such as pop music that has a high-frequency signal. On the other hand, the optimization processing unit 12 updates the control information so as to increase the effect of the high-cut control for content such as classical music that does not have a high-frequency signal. As a result, the broadcast receiving apparatus 10 can perform reception operations in accordance with the content or frequency characteristics.

In step ST24, the situation determination section 21 determines whether or not the current position is a radio wave specific place based on the position information from the own vehicle position determination section 3. FIG. Whether or not the position of the vehicle 1 is in the radio wave specific environment is determined based on the position where the vehicle 1 has traveled in the past and the reception conditions at that position, which are stored in the control information storage unit 20. be. For example, when the received power is extremely low only at a certain position, or the number of multipaths is increasing, the situation judgment unit 21 judges that position as a radio wave peculiar place. If the position of the vehicle 1 is in the radio wave unique place (“YES” in step ST24), the optimization processing unit 12 updates the control information in accordance with the radio wave unique place, and transmits the updated control information via the reception operation control unit 13. and output to the analog broadcast receiving section 11 (step ST25). On the other hand, when the position of the vehicle 1 is not a radio wave specific place (step ST24 "NO"), the process proceeds to step ST26.

In step ST25, if the control information storage unit 20 stores control information corresponding to the same or similar reception condition as the current reception condition of the radio wave specific location, the optimization processing unit 12 determines that the same or similar reception condition may be read from the control information storage unit 20 . The control information stored in the control information storage unit 20 may have been learned and stored by the optimization processing unit 12 in the past, or may be stored in the control information storage unit 20 by the manufacturer of the broadcast receiving device 10 or the like. It may be set in advance. Further, the optimization processing unit 12 may learn control information for the radio-specific location based on the reception conditions and reception performance results from the analog broadcast reception unit 11, as in the first embodiment. As a result, the broadcast receiver 10 can improve temporary deterioration of reception when the vehicle 1 travels in a place where radio waves are peculiar.

Note that when the radio wave peculiar location is small, even if the control information is updated at the radio wave peculiar location, the normal radio wave condition immediately returns, and the control information also returns to the normal control information. In such a case, the optimization processing section 12 does not need to update the control information in step ST25. Information about the size of the radio wave peculiar location, which serves as a guideline for whether to update or continue the control information, may be determined in advance for the optimization processing unit 12 or the control information storage unit 20 . Also, the information about the size of the radio wave singularity may differ from passenger to passenger. As a result, the broadcast receiving apparatus 10 can suppress an auditory sense of incongruity caused by frequent updating of the control information.

In step ST26, the situation determining section 21 determines whether or not an obstacle such as a truck exists around the vehicle 1 based on the surrounding situation information from the surrounding situation determining section 5. FIG. If there is an obstacle around the vehicle 1 (“YES” in step ST26), the optimization processing unit 12 updates the control information in accordance with the obstacle, and transmits the updated control information via the reception operation control unit 13. It outputs to the analog broadcast receiving section 11 (step ST27). On the other hand, if there is no obstacle around the vehicle 1 (step ST26 "NO"), the process proceeds to step ST28.

In step ST27, if the control information storage unit 20 stores control information for an obstacle that is the same as or similar to an obstacle that exists around the vehicle 1, the optimization processing unit 12 selects an obstacle that is the same or similar. Corresponding control information may be read from the control information storage unit 20 . The control information stored in the control information storage unit 20 may have been learned and stored by the optimization processing unit 12 in the past, or may be stored in the control information storage unit 20 by the manufacturer of the broadcast receiving device 10 or the like. It may be set in advance. Further, the optimization processing unit 12 may learn control information for obstacles based on the reception conditions and reception performance results from the analog broadcast reception unit 11, as in the first embodiment. As a result, the broadcast receiver 10 can improve temporary deterioration of reception due to external factor noise from the truck or the like when an obstacle such as a truck runs around the vehicle 1 .

Note that the optimization processing unit 12 does not have to update the control information in step ST27 depending on the relative positional relationship between the obstacle and the vehicle 1 or the like. For example, in a situation where the truck, which is an obstacle, and the vehicle 1 are running side by side, reception deterioration is expected to occur during the running side by side, so the optimization processing unit 12 updates the control information. On the other hand, in a situation where the vehicle 1 overtakes the truck or the truck overtakes the vehicle 1, the deterioration of reception is expected to end in an instant, so the optimization processing unit 12 does not update the control information. Information about the relative positional relationship and the like that serves as a guideline for whether to update or continue the control information may be determined in advance for the optimization processing unit 12 or the control information storage unit 20 .

In step ST28, the situation determination section 21 determines whether or not the passenger identified by the passenger determination section 7 has changed, that is, whether or not the passenger has boarded or alighted. If the passenger has changed (step ST28 "YES"), the process returns to step ST21. If the passenger has not changed (step ST28 "NO"), the process returns to step ST22.

It should be noted that the server device 30 may be configured to collect and accumulate information indicating the correspondence relationship between various types of information and control information as shown in FIG. good. In this case, the communication device 8 of the vehicle 1 reads the control information and the like stored in the control information storage unit 20 and transmits it to the server device 30 . Further, the communication device 8 of the vehicle 1 acquires control information and the like collected from the broadcast receiving devices 10 of other vehicles from the server device 30 and stores the information in the control information storage unit 20 of the vehicle 1 . At this time, it is preferable that the communication device 8 acquire control information and the like of other vehicles that are the same as or similar to the vehicle type of the vehicle 1 from the server device 30 . This is because the vehicle type affects the reception environment of broadcast waves. With this configuration, the broadcast receiver 10 can share control information among a plurality of vehicles. Therefore, even if the vehicle 1 has never traveled in a place, for example, it is possible to determine whether or not the place is a radio-wave-specific place.
Note that the communication device 8 may acquire control information or the like directly from another vehicle through vehicle-to-vehicle communication or the like.

As described above, broadcast receiving apparatus 10 according to Embodiment 2 includes situation determination section 21 that determines the current situation. The optimization processing unit 12 updates the control information when the situation determined by the situation determination unit 21 changes. Thereby, the broadcast receiving apparatus 10 can change the reception operation at any time according to changes in the situation.

Further, the broadcast receiving apparatus 10 according to Embodiment 2 includes a program music determination section 22 that determines the content of the analog broadcast wave being received by the analog broadcast reception section 11 using program music information existing on the Internet. . The situation determination section 21 determines whether or not the content determined by the program music determination section 22 has changed. When the situation determination unit 21 determines that the content has changed, the optimization processing unit 12 updates the control information according to the content after the change. As a result, the broadcast receiver 10 can identify the content being received in real time, and can update the control information to suit the content. In addition, the broadcast receiving apparatus 10 can improve auditory performance by updating the control information to be suitable for the content.

Further, the broadcast receiving apparatus 10 according to Embodiment 2 includes a Fourier transform section 15 that Fourier transforms the analog broadcast wave signal received by the analog broadcast receiving section 11 . The program music determination unit 22 determines the frequency characteristics of analog broadcast waves based on the FFT result of the Fourier transform unit 15 . The situation determination section 21 determines whether or not the frequency characteristic determined by the program music determination section 22 has changed. When the situation determination unit 21 determines that the frequency characteristics have changed, the optimization processing unit 12 updates the control information in accordance with the changed frequency characteristics. Thereby, the broadcast receiving apparatus 10 can estimate the frequency characteristic corresponding to the content using the FFT result, and can update the control information to be suitable for the frequency characteristic. In addition, the broadcast receiving apparatus 10 can improve the perceptual performance by updating the control information to the control information suitable for the frequency characteristics.

Moreover, the broadcast receiving apparatus 10 according to Embodiment 2 includes a control information storage unit 20 that stores control information for each passenger. The situation determination unit 21 selects control information corresponding to passengers on board the vehicle 1 from the control information storage unit 20 . The optimization processing unit 12 updates the control information corresponding to the passenger selected by the situation determination unit 21 when the situation determined by the situation determination unit 21 changes. Thereby, the broadcast receiver 10 can reflect the control information that matches the preference of the passenger in the receiving operation. In addition, the broadcast receiving device 10 can update the control information that matches the preference of the passenger at any time according to changes in the situation.

Further, the situation determination unit 21 of Embodiment 2 determines whether or not the current position of the vehicle 1 is in a peculiar radio wave environment. The optimization processing unit 12 updates the control information when the situation determination unit 21 determines that the current position of the vehicle 1 is in a unique radio wave environment. As a result, the broadcast receiving apparatus 10 can update the control information to optimum control information even when the radio wave environment changes, and can improve reception performance.

Moreover, the situation determination unit 21 of the second embodiment determines whether or not there is an obstacle around the vehicle 1 . The optimization processing unit 12 updates the control information when the situation determination unit 21 determines that an obstacle exists around the vehicle 1 . As a result, the broadcast receiving apparatus 10 can update the control information to optimum control information against external factor noise from obstacles such as trucks, and can improve reception performance.

Although the broadcast receiving apparatus 10 shown in FIG. 7 is configured to receive analog broadcast waves, it may be configured to receive digital broadcast waves. In that case, the broadcast receiver 10 shown in FIG. 7 includes a digital broadcast receiver 16 shown in FIGS. 5 and 6 instead of the analog broadcast receiver 11 and Fourier transform 15. FIG.
Further, the broadcast receiver 10 may be configured to include both the analog broadcast receiver 11 and the digital broadcast receiver 16 .

When the broadcast receiving device 10 is configured to include the digital broadcast receiving section 16, the program music determining section 22 acquires the program music information from the server device 30 via the communication device 8, and also obtains the digital broadcast receiving section 16. Program music information included in the digital broadcast wave being received may be obtained.

FIG. 10 is a diagram showing examples of various information used when the broadcast receiving apparatus 10 according to Embodiment 2 is configured to receive digital television broadcast waves. In the example of FIG. 10, the control information storage unit 20 stores the channel (CH) being received by the digital broadcast receiving unit 16, received power, PER, and CN as the reception conditions output by the digital broadcast receiving unit 16. ing. Further, the position, content, vehicle type, and passenger are stored as the situation determined by the situation determination unit 21 . Also, the viewing state is stored as the reception performance result output by the digital broadcast receiving unit 16 . The viewing state indicates whether the demodulator 162 of the digital broadcast receiver 16 is outputting one-segment broadcasting (hereinafter referred to as "one-segment") or full-segment broadcasting (hereinafter referred to as "full-segment").

Conventionally, the manufacturer of the broadcast receiving apparatus 10 or the like determines in advance the threshold for switching between One Seg and Full Seg that changes in conjunction with PER, CN, etc., and sets it in the digital broadcast receiving section 16 as control information. In addition, in the conventional broadcast receiver 10, a "full-seg priority mode" that continues full-seg even if block noise occurs, and a "one-seg priority mode" that switches from full-seg to one-seg before block noise occurs. Some let people choose. However, switching between One Seg and Full Seg differs depending on program contents or passengers. For example, in the case of sports programs, full-segment viewing is preferable because small characters such as scores cannot be seen in one-segment broadcasting. With regard to such digital television broadcasting, as with analog broadcasting, the broadcast receiving apparatus 10 according to Embodiment 2 updates the threshold for switching between One Seg and Full Seg, which is one piece of control information, according to the passenger and the content. be able to. For example, the optimization processing unit 12 sets the threshold value for switching between One Seg and Full Seg to a value that makes it difficult to switch to One Seg and easy to switch to Full Seg for a passenger for whom "Full Seg priority mode" is set in advance. In addition, when the content determined by the program music determination unit 22 is content that includes many small characters (for example, sports), the optimization processing unit 12 sets the threshold for switching between One Seg and Full Seg to make it difficult to switch to One Seg. And set a value that makes it easy to switch to Full Seg.

Also, when a truck passes around the vehicle 1, block noise may occur temporarily. Due to the long delay of digital television broadcast waves, block noise may occur temporarily only at a specific location. When such temporary block noise occurs, even if the digital broadcast receiving unit 16 switches from full-segment to one-segment, the block noise disappears immediately, so that one-segment is switched back to full-segment. In this case, for example, the optimization processing unit 12 sets the threshold for switching between One Seg and Full Seg to a value at which it is difficult to switch to One Seg and easy to switch to Full Seg for a passenger for whom the "Full Seg priority mode" is set in advance. to Further, for example, when the situation determination unit 21 determines that the current position of the vehicle 1 is in a radio-wave-specific location, the optimization processing unit 12 determines whether switching from full-segment to one-segment is not possible depending on the size of the radio-wave-specific location. A threshold may be used. Thereby, the broadcast receiving apparatus 10 can suppress difficulty in viewing due to frequent switching between One Seg and Full Seg.

Finally, the hardware configuration of the broadcast receiving apparatus 10 according to each embodiment will be explained.
11 and 12 are diagrams showing hardware configuration examples of the broadcast receiving apparatus 10 according to each embodiment. The control information storage unit 20 in the broadcast receiving apparatus 10 is a built-in memory (not shown) of the processing circuit 100 or the memory 102 . The functions of the analog broadcast receiving unit 11, the digital broadcast receiving unit 16, the optimization processing unit 12, the reception operation control unit 13, the Fourier transform unit 15, the situation determination unit 21, and the program music determination unit 22 in the broadcast receiving device 10 are realized by a circuit. The processing circuit may be the processing circuit 100 as dedicated hardware, or the processor 101 that executes a program stored in the memory 102 .

As shown in FIG. 11, when the processing circuit is dedicated hardware, the processing circuit 100 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an Application Specific Integrated Circuit (ASIC). ), FPGA (Field Programmable Gate Array), or a combination thereof. The functions of the analog broadcast receiver 11, the digital broadcast receiver 16, the optimization processor 12, the reception operation controller 13, the Fourier transform unit 15, the situation determination unit 21, and the program music determination unit 22 are realized by a plurality of processing circuits 100. Alternatively, the functions of each unit may be collectively realized by one processing circuit 100 . For example, as shown in FIG. 11, the functions of the analog broadcast receiving section 11 and the digital broadcast receiving section 16 may be realized by the receiving circuit 103. FIG.

As shown in FIG. 12, when the processing circuit is the processor 101, the analog broadcast receiver 11, the digital broadcast receiver 16, the optimization processor 12, the reception operation controller 13, the Fourier transform unit 15, and the situation determination unit 21 , and the program music determination section 22 are implemented by software, firmware, or a combination of software and firmware. Software or firmware is written as a program and stored in memory 102 . The processor 101 reads out and executes programs stored in the memory 102 to achieve the functions of each unit. That is, the broadcast receiving apparatus 10 has a memory 102 for storing a program that, when executed by the processor 101, results in execution of the steps shown in the flowchart of FIG. 3 and the like. This program also includes the procedures or methods of the analog broadcast receiving section 11, the digital broadcast receiving section 16, the optimization processing section 12, the reception operation control section 13, the Fourier transform section 15, the situation determination section 21, and the program music determination section 22. It can also be said that it is something that causes a computer to execute

Here, the processor 101 is a CPU (Central Processing Unit), a processing device, an arithmetic device, a microprocessor, or the like.
The memory 102 may be a nonvolatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable ROM), or flash memory, or a hard disk or flexible disk. or an optical disc such as a CD (Compact Disc) or a DVD (Digital Versatile Disc).

Some of the functions of the analog broadcast receiving unit 11, digital broadcast receiving unit 16, optimization processing unit 12, reception operation control unit 13, Fourier transform unit 15, situation determination unit 21, and program music determination unit 22 are dedicated hardware, and a part thereof may be implemented by software or firmware. Thus, the processing circuit in the broadcast receiving device 10 can implement the above-described functions by hardware, software, firmware, or a combination thereof.

It should be noted that, within the scope of the present invention, it is possible to freely combine each embodiment, modify any component of each embodiment, or omit any component of each embodiment.

Since the broadcast receiver according to the present invention learns the control coefficient, it is suitable for use in a broadcast receiver such as a vehicle in which the radio wave environment changes from moment to moment.

1 vehicle, 2 high-precision locator, 3 vehicle position determination unit, 4 exterior camera, 5 surrounding situation determination unit, 6 vehicle interior camera, 7 passenger determination unit, 8 communication device, 10 broadcast receiver, 11 analog broadcast receiver ( receiving unit), 12 optimization processing unit, 13 reception operation control unit, 15, 164 Fourier transform unit, 16 digital broadcast receiving unit (receiving unit), 20 control information storage unit, 21 situation determination unit, 22 program music determination unit, 30 server device, 111, 161 tuner section, 112, 162 demodulation section, 113, 163 AD conversion section, 114 noise suppression section, 115, 166 reception status detection section, 165 OFDM demodulation section, 100 processing circuit, 101 processor, 102 memory , 103 receiving circuit.

Claims (8)

A broadcast receiver mounted on a vehicle,
a receiving unit that performs a broadcast wave reception operation using control information and outputs a reception condition of the broadcast wave and a reception performance result of the reception operation;
an optimization processing unit that learns the relationship between the control information and the reception performance result for the reception condition and updates the control information;
a reception operation control unit that sets the control information updated by the optimization processing unit to the reception unit ;
A situation determination unit that determines the current situation regarding at least one of the passenger, frequency characteristics, and vehicle type ,
The broadcast receiving apparatus, wherein the optimization processing unit updates the control information when at least one of the passenger, frequency characteristics, and vehicle type determined by the situation determination unit changes. a program music determination unit that determines the content of the broadcast wave that is being received by the receiving unit using program music information that exists on the Internet or is included in the broadcast wave that is being received by the receiving unit;
The situation determination unit determines whether or not the content determined by the program music determination unit has changed,
2. The broadcast receiving apparatus according to claim 1 , wherein the optimization processing unit updates the control information in accordance with the changed content when the situation determining unit determines that the content has changed. A control information storage unit that stores control information for each passenger,
The situation determination unit selects control information corresponding to a passenger on board the vehicle from the control information storage unit,
2. The optimization processing unit updates the control information corresponding to the passenger selected by the situation determination unit when the situation determined by the situation determination unit changes. broadcasting receiver. The situation determination unit determines whether the current position of the vehicle is in a unique radio wave environment,
2. The broadcast receiving apparatus according to claim 1 , wherein the optimization processing unit updates the control information when the situation determination unit determines that the current position of the vehicle is in a peculiar radio wave environment. The situation determination unit determines whether or not an obstacle exists around the vehicle,
2. The broadcast receiving apparatus according to claim 1, wherein the optimization processing unit updates the control information when the situation determination unit determines that an obstacle exists around the vehicle. A broadcast receiver mounted on a vehicle,
a receiving unit that performs a broadcast wave reception operation using control information and outputs a reception condition of the broadcast wave and a reception performance result of the reception operation;
an optimization processing unit that learns the relationship between the control information and the reception performance result for the reception condition and updates the control information;
a reception operation control unit that sets the control information updated by the optimization processing unit to the reception unit;
a situation determination unit that determines the current situation;
a program music determination unit that determines the content of the broadcast wave that is being received by the receiving unit using program music information that exists on the Internet or is included in the broadcast wave that is being received by the receiving unit;
a Fourier transform unit that Fourier transforms the signal of the broadcast wave received by the receiving unit;
The situation determination unit determines whether or not the content determined by the program music determination unit has changed,
When the situation determination unit determines that the content has changed, the optimization processing unit updates the control information according to the content after the change,
The program music determination unit determines the frequency characteristics of the broadcast wave based on the Fourier transform result of the Fourier transform unit,
The situation determination unit determines whether or not the frequency characteristics determined by the program music determination unit have changed,
The broadcast receiving apparatus, wherein the optimization processing unit updates the control information in accordance with the changed frequency characteristics when the situation determination unit determines that the frequency characteristics have changed. A broadcast receiver mounted on a vehicle,
a receiving unit that performs a broadcast wave reception operation using control information and outputs a reception condition of the broadcast wave and a reception performance result of the reception operation;
an optimization processing unit that learns the relationship between the control information and the reception performance result for the reception condition and updates the control information;
a reception operation control unit that sets the control information updated by the optimization processing unit to the reception unit;
a situation determination unit that determines the current situation;
A control information storage unit that stores control information for each passenger,
The situation determination unit selects control information corresponding to a passenger on board the vehicle from the control information storage unit,
The broadcast receiving apparatus, wherein the optimization processing unit updates the control information corresponding to the passenger selected by the situation determination unit when the situation determined by the situation determination unit changes. A broadcast receiving method for a broadcast receiving device mounted on a vehicle,
A receiving unit performs a broadcast wave reception operation using the control information, outputs the reception condition of the broadcast wave and the reception performance result of the reception operation,
an optimization processing unit learning a relationship between the control information and the reception performance result for the reception condition and updating the control information;
a reception operation control unit setting the control information updated by the optimization processing unit to the reception unit ;
A situation determination unit determines a current situation regarding at least one of a passenger, frequency characteristics, and a vehicle type,
The broadcast reception method, wherein the optimization processing unit updates the control information when at least one of the passenger, frequency characteristics, and vehicle type determined by the situation determination unit changes.

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