JP2011015291A - Radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio receiver which suppresses costs even when packaging a plurality of tuners.SOLUTION: The present invention is characterized in including: a first tuner for receiving a mixed wave of an analog broadcast signal and a digital broadcast signal transmitted from a first broadcast station; a first analog demodulator for demodulating the analog broadcast signal received by the first tuner; a first digital demodulator for demodulating the digital broadcast signal received by the first tuner; a second tuner for receiving only a digital broadcast signal transmitted from the second broadcast station; a second digital demodulator for demodulating the digital broadcast signal received by the second tuner; and a controller for controlling tuning of the first and second tuners.

Description

  The present invention relates to a radio receiver, and more particularly to a radio receiver capable of receiving a digital broadcast signal.

Hybrid digital radio (HD radio) has been put to practical use mainly in the United States as a means for realizing high-quality sound broadcasting compared to conventional analog broadcasting. HD radio uses an in-band on-channel (IBOC) system, which uses the existing AM or FM analog broadcasting frequency to transmit digital signals simultaneously with analog broadcasting ( For example, Patent Document 1).
FIG. 1 shows an example of the frequency characteristics of signals used in the IBOC method. As shown in FIG. 1, the signal waveform includes an existing FM analog signal 1001 and sidebands 1002 and 1003 which are digital signals.

  The IBOC method uses the same frequency as that of existing analog broadcasting, so there is no need to newly assign a frequency for digital broadcasting. In the IBOC system, both conventional analog broadcast signals and digital broadcast signals can be received. Use this to receive digital broadcasts when the radio wave is strong, such as when receiving near a broadcast station, and receive analog broadcasts when the radio wave is weak, such as when receiving at a location far from the broadcast station. it can.

  In addition, when a digital broadcast signal is received and sound is reproduced, high-quality sound can be reproduced as compared with a case where a conventional analog broadcast signal is received. Furthermore, in a digital broadcast signal, not only an audio signal but also a data broadcast signal can be transmitted. Examples of the data include traffic information, the title of a song being broadcast, the name of an artist, text such as news, and the like.

  Here, when a radio receiver is mounted on a vehicle and a data broadcast related to traffic information such as traffic jam information is received, it is desirable to always receive the traffic information while the vehicle is running. However, a single broadcasting station does not always transmit both traffic information and music. Therefore, when receiving traffic information while listening to music, at least two tuners are required to receive radio waves from the respective broadcasting stations.

JP 2005-159535 A

  In the case of an IBOC radio receiver, an IF (intermediate frequency) filter and a signal demodulator must be provided for both analog and digital signals. As described above, when two tuners are simply mounted, a plurality of sets of IF filters and signal demodulation units are required, which causes a problem that the cost is significantly increased as compared with the case where only one tuner is mounted.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a radio receiver with reduced cost even when a plurality of tuners are mounted.

  The present invention includes a first tuner that receives a mixed wave of an analog broadcast signal and a digital broadcast signal transmitted from a first broadcast station, and a first analog demodulator that demodulates the analog broadcast signal received by the first tuner. A first digital demodulator that demodulates the digital broadcast signal received by the first tuner, a second tuner that receives only the digital broadcast signal transmitted from the second broadcast station, and the second tuner that receives the digital broadcast signal. A second digital demodulator for demodulating the digital broadcast signal, and a controller for controlling channel selection of the first and second tuners.

  The radio receiver of the present invention can provide a radio receiver that can receive other broadcast stations at a low cost while constantly receiving digital broadcasts from a specific broadcast station.

It is a figure showing the frequency characteristic of the signal level of an IBOC system. 1 is a block diagram of a radio receiver according to Embodiment 1. FIG. 3 is a flowchart illustrating a sound reproduction procedure in a first tuner unit of the radio receiver according to the first embodiment. 6 is a flowchart illustrating a traffic information acquisition procedure in a second tuner unit of the radio receiver according to the first embodiment. It is a figure which shows the example of a display at the time of displaying the traffic information received with the radio receiver of Example 1 on a display apparatus. It is a display example at the time of displaying the character data of the traffic information received with the radio receiver of Example 1. FIG. 6 is a block diagram of a radio receiver according to Embodiment 2. FIG. 10 is a flowchart in a case where data broadcasting is received from a plurality of broadcasting stations by the radio receiver according to the second embodiment. It is a display example of the music list produced based on the data received with the radio receiver of Example 2. It is a flowchart which shows the procedure of reproduction | regeneration and recording of the music selected from the music list acquired with the radio receiver of Example 2. FIG. 10 is a display example of a music list of songs recorded by the radio receiver according to the second embodiment. It is a flowchart which shows the procedure of reproduction | regeneration and deletion of the music recorded with the radio receiver of Example 2. FIG. 6 is a block diagram of a radio receiver according to Embodiment 3. FIG. It is a display example at the time of displaying the traffic information and music information which were received with the radio receiver of Example 3. 10 is a block diagram of a radio receiver according to Embodiment 4. FIG. It is a display example at the time of displaying the broadcast schedule list of the music received with the radio receiver of Example 4. 10 is a flowchart illustrating a procedure for reproducing and recording a song reserved by the radio receiver according to the fourth embodiment.

  The radio receiver of the present invention will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 2 is a block diagram of the radio receiver according to the first embodiment. The configuration of the radio receiver according to the first embodiment of the present invention will be described with reference to FIG. The radio receiver 101 according to the first embodiment includes two tuners, a first tuner unit 21 and a second tuner unit 22. The first tuner unit 21 receives both analog / digital broadcast signals, and the second tuner unit 22 receives only digital broadcast signals. Furthermore, the radio receiver 101 includes a control unit 201, and performs channel selection of the first tuner unit 21 and the second tuner unit 22. Broadcast signals transmitted from the first broadcast station 91 and the second broadcast station 92 are received by the antenna 100 installed outside the radio receiver 101.

  Since the first tuner unit 21 receives both analog and digital signals, the IF filter and the demodulation unit are provided for analog and digital use. That is, a first digital filter 31 and a first digital demodulation unit 41 are connected to the first tuner unit 21 for digital signals. On the other hand, a first analog filter 32 and a first analog demodulation unit 42 are connected to the first tuner unit 21 for analog signals. The first digital demodulation unit 41 can output a data signal to the display unit 8 provided outside the radio receiver 101 when data such as character information is included in the digital signal. Furthermore, a digital / analog audio switching unit 5 is provided to switch both demodulated analog and digital signals and output them to the audio output device 7 provided outside the radio receiver.

  Since the second tuner unit 22 receives only the digital signal, the second tuner unit 22 includes an IF filter and a demodulation unit for processing the digital signal. That is, the radio receiver 101 is connected to the second digital IF filter 3 connected to the second tuner unit 22 and the second digital demodulation unit 4. Further, a traffic information memory 601 for storing data such as traffic information demodulated by the second digital demodulator is provided. The data demodulated by the second digital demodulator 4 can also be output to the display unit 8 and the navigation device 9 provided outside the radio receiver 101 under the control of the control unit 201. The data stored in the traffic information memory 601 can be output to the display unit 8 under the control of the control unit 201.

  With the above configuration, a music program broadcast from the first broadcast station 91 is received by the second tuner dedicated to data broadcast signals such as traffic information, and simultaneously broadcast from the second broadcast station 92. It is possible to receive data broadcast signals such as traffic information.

  Further, as described above, the radio receiver 101 according to the first embodiment includes the analog and digital IF filters and the demodulation unit on the first tuner unit 21 side that receives the analog broadcast signal and the digital broadcast signal. On the other hand, only the digital IF filter and the demodulation unit are provided on the second tuner 22 side that receives only the digital broadcast signal. With such a configuration, the analog IF filter and the demodulation unit can be omitted on the second tuner unit 22 side, and the cost of the radio receiver can be suppressed.

  The second digital demodulator 4 may demodulate both the subbands 1002 and 1003 of the digital signal shown in FIG. 1, but since both transmit the same signal, only one of them is transmitted. May be demodulated. By setting one of the subbands 1002 and 1003 (see FIG. 1) as the digital signal to be demodulated, the band to be processed can be narrowed, and the component cost can be suppressed.

  FIG. 3 is a flowchart illustrating an audio reproduction procedure in the first tuner unit of the radio receiver according to the first embodiment. With reference to FIG. 3, an audio reproduction procedure in the first tuner unit of the radio receiver 101 according to the first embodiment will be described. Here, it is assumed that the first broadcasting station 91 (see FIG. 2) performs audio broadcasting such as a music program for both analog and digital. First, in step S101, the control unit 201 controls the first tuner unit 21 to select the first broadcast station 91. Of the signals received by the first tuner unit 21, the digital signal is input to the digital / analog audio switching unit 5 via the first digital filter and the first digital demodulation unit. An analog signal among signals received by the first tuner unit 21 is input to the digital / analog audio switching unit 5 via the first analog filter 32 and the first analog demodulation unit 42.

  Next, in step S102, the control unit 201 determines whether or not the radio wave intensity of the first broadcast station 91 received by the first tuner unit is greater than a predetermined value. If the intensity of the radio wave is greater than a predetermined value, the control unit 201 controls the digital / analog audio switching unit 5 to select digital audio in step S103. On the other hand, when the intensity of the radio wave is smaller than the predetermined value, in step S104, the control unit 201 controls the digital / analog audio switching unit 5 to select analog audio. The audio signal selected by the digital / analog audio switching unit is output to the audio output device 7, and is reproduced from the audio output device 7 in step S105.

  Further, in step S106, the control unit 201 determines whether or not character data is included in the digital signal demodulated by the first digital demodulation unit 41. If it is determined that character data is included, in step S107, the control unit 201 controls the first digital demodulation unit to cause the display unit 8 to output character data.

  FIG. 4 is a flowchart illustrating a traffic information acquisition procedure in the second tuner unit of the radio receiver according to the first embodiment. A procedure for receiving a data broadcast signal such as traffic information will be described with reference to FIG. Here, it is assumed that the second broadcasting station 92 (see FIG. 2) broadcasts data such as traffic information by digital broadcasting. First, in step S201, the control unit 201 controls the second tuner unit 22 to select a channel so as to receive the broadcast signal of the second broadcast station 92. The digital signal received by the second tuner unit 22 is demodulated by the second digital IF filter 3 and the second digital demodulation unit 4 to extract traffic information.

  Next, in step S202, the control unit 201 determines whether or not traffic information is extracted in the second digital demodulation unit 4, and in a state where the traffic information is not transmitted, the traffic information is transmitted back to the original. Wait until. If the traffic information is transmitted and extracted, in step S203, the control unit 202 determines whether or not map data is included in the traffic information. If the map data is included, the traffic information is transmitted to the navigation device (navigation) 9 provided outside the radio receiver 101 in step S204. In step S205, the navigation device 9 superimposes the map data acquired by the navigation device and the traffic information and displays them on the display unit 8.

  On the other hand, if it is determined in step S203 that there is no map data, the presence / absence of character data is determined in step S206. If character data exists, the control unit 201 causes the second digital demodulation unit 4 to output character data to the display unit 8 in step S207. In step S208, the character data is stored in the traffic information memory 601.

  FIG. 5 is a display example when the traffic information received by the radio receiver of the first embodiment is displayed on the screen of the display device. A map 11 acquired by the navigation device 9 is displayed on a part of the display device 10, and the position of the vehicle on the road 13 is displayed as a mark 12 on the map 11. Furthermore, a congested area 14 is displayed on a part of the road based on map data such as traffic information included in the traffic information. When information such as the name of a song broadcast by the first broadcasting station 91 that broadcasts a music program is received by digital broadcasting, character information such as the song name is displayed in the display area 15 around the map 11. May be displayed.

  FIG. 6 is a display example when character data of traffic information received by the radio receiver according to the first embodiment is displayed. A display example in the case where only traffic data is included in the traffic information received by the radio receiver 101 according to the first embodiment will be described with reference to FIG. On the display device 10 that is the display unit 8, traffic information such as traffic jam information is displayed in characters. Furthermore, if the display screen of the display device 10 includes character data in the music program currently received by the first tuner unit, data such as a song title may be displayed in the display area 15. Good.

  In the present embodiment, by constantly receiving such data broadcasts such as traffic information, music broadcasts of other stations can be simultaneously reproduced while being always displayed on the display device.

  In the above invention, when the data received by the first tuner unit is data other than audio information, for example, data displayed on the screen, different types of audio information cannot be output at the same time. We are paying attention to the fact that multiple data can be displayed at the same time.

  FIG. 7 is a block diagram of the radio receiver 102 according to the second embodiment. The configuration of the radio receiver according to the second embodiment of the present invention will be described with reference to FIG. The radio receiver 102 according to the second embodiment is different from the radio receiver according to the first embodiment in that a music data memory 602 is provided as a memory for storing digital data received by the second tuner unit 22.

  The radio receiver according to the second embodiment is characterized in that it receives data broadcast signals such as other music programs broadcast from the second broadcast station while receiving music programs broadcast from the first broadcast station 91. It is said. Furthermore, the radio receiver 1 according to the second embodiment is characterized in that data relating to a music program broadcast from the second broadcasting station 92 is recorded, and the music program is reproduced or recorded based on the recording result.

  On the first tuner unit 21 side, a music program or the like is received and reproduced from the audio output device 7 as in the first embodiment. On the other hand, the second tuner unit 22 receives data related to the currently broadcast music program transmitted from the second broadcasting station 92. Specifically, data such as the name of music currently being broadcast by the second broadcasting station 92 from the second digital demodulator 4 is displayed on the display unit 8 and stored in the music data memory 602.

  Further, when there is a third broadcasting station 93 that broadcasts a music program, the control unit 202 controls the second tuner unit 22 to select the third broadcasting station 93, and In the same manner as described above, data such as the title of music currently being broadcast by the third broadcasting station 93 is displayed on the display unit 8 and stored in the music data memory 602. In this way, the control unit 202 controls the second tuner unit 22 so as to receive data broadcast signals transmitted from a plurality of broadcast stations by repeating channel selection and reception of data broadcast signals every predetermined time. To do.

FIG. 8 is a flowchart illustrating a procedure when data broadcasting is received from a plurality of broadcasting stations by the radio receiver according to the second embodiment. A procedure for creating a music list when the number of broadcasting stations broadcasting a music program (maximum value = k _max ) is known in advance will be described with reference to FIG. First, in step S301, the value of k, which is the broadcast station identification number, is set to an initial value of 0, and in step S302, the value of k is incremented by one. Next, in step S303, the control unit 202 controls the second tuner unit 22 to select the kth broadcast station. Here, data regarding the frequency of the broadcast signal of each broadcast station can be stored in a memory (not shown) in the control unit 202.

  In step S304, it is determined whether or not a data broadcast has been received. If a data broadcast related to a music program broadcast by the k-th broadcast station cannot be received, the process returns to step S303. If a data broadcast has been received, data such as a song title related to the music program is stored in the music data memory 602 in step S305.

Next, in step S306, it is determined whether or not the number k of broadcasting stations has reached the maximum value k _max . If the maximum value k _max has not been reached, the process returns to step S302, the value of k is incremented by one, the next broadcasting station is selected, and data relating to the music program being broadcast is acquired. Thereafter, the acquired data is stored in the music data memory 602 in the same manner as described above. When the number k of broadcasting stations reaches the maximum value k _max in step S306, a music list as shown in FIG. 9 is created based on the data acquired in step S307. As described above, after acquiring data such as the names of songs currently being broadcast by a plurality of broadcasting stations, a list of songs may be displayed on the display unit 8 in the form of a list.

  FIG. 9 is a display example of a music list created based on data received by the radio receiver of the second embodiment. As shown in FIG. 9, for example, it is understood that the title a of artist a is being broadcast from the broadcast station A, and the title b of artist b is being broadcast from the broadcast station B.

  Further, a mode selection column may be provided so that a mode for reproducing or recording a song displayed on the song list 20 can be selected. For example, by selecting the reproduction mark 211 in the rightmost column of the music list 20, the control unit 202 (see FIG. 7) controls the first tuner unit 21 to select the broadcasting station B and reproduce the title b. You may do it. At this time, in order to make the user recognize that the title b is being played back, a display such as “Now Playing” may be displayed on the left end of the music list 20.

  As described above, the control unit 202 controls the second tuner unit 22 by selecting the recording mark 212 in the rightmost column of the music list 20 while the music program of the broadcasting station B is being reproduced. Thus, the broadcast station D may be selected and the title d may be recorded in the music data memory 602 for recording. At this time, in order to make the user recognize that the title d is being recorded, a display such as “recording” may be performed at the left end of the music list 20. The recorded title d can be reproduced by outputting it from the music data memory 602 to the audio output device 7 such as a speaker. Further, a button 213 for displaying already recorded music data may be displayed on the display screen of the display 10. As described above, as means for selecting a mode, the cursor may be moved by an input terminal, or the display device 10 may be selected by attaching a touch panel and touching the screen.

  FIG. 10 is a flowchart illustrating a procedure for reproducing and recording a song selected from the song list acquired by the radio receiver according to the second embodiment. A procedure for reproducing or recording a specific song from the song list displayed in the song list 20 will be described with reference to FIG. First, in step S401, the control unit 202 (see FIG. 7) determines whether or not there is a reproduction instruction from the user of the music displayed in the music list. If there is a song for which the play button has been selected among the songs included in the song list 20, in step S402, the control unit 202 selects the broadcast station that broadcasts the song for which the play instruction has been received. Controls the first tuner unit 21. Next, in step S403, the tune selected by the user is reproduced by outputting a digital or analog audio signal broadcast from the broadcasting station selected by the first tuner unit 21 to the audio output device 7.

  If there is no reproduction instruction in step S401, it is determined in step S404 whether there is a recording instruction from the user. If there is a song for which the user has selected the record button among the songs shown in the song list 20, in step S405, control is performed so as to select a broadcasting station broadcasting the song for which the recording instruction has been given. The unit 202 controls the second tuner unit 22. Next, in step S406, the second tuner unit 22 acquires digital data of the song being broadcast, and stores the acquired digital data in the music data memory 602 in step S407.

  If any of the songs shown in the song list 20 has not been instructed to be played or recorded, the process waits for an instruction as to whether or not to end this mode in step S408. For example, when the button 213 for displaying recorded music data is selected, this mode ends, and a list of recorded songs to be described later is displayed.

  FIG. 11 is a display example of a song list of songs recorded by the radio receiver according to the second embodiment. With reference to FIG. 11, the playback procedure of the music recorded as described above will be described. The recorded music list 40 can be composed of data relating to recorded music stored in the music data memory 602. The recorded music list 40 includes recorded time (broadcast time) in addition to data related to the music. Further, the recorded music list 40 may display a playback button 401 for playing back the recorded music and an erase button 402 for deleting. Further, a screen switching button 214 may be displayed for the purpose of redisplaying the song list 20 being broadcast.

  FIG. 12 is a flowchart illustrating a procedure for reproducing and erasing a song recorded by the radio receiver according to the second embodiment. A procedure for selecting and reproducing or deleting a specific song from the recorded song list will be described with reference to FIG. First, in step S501, the controller 202 (see FIG. 7) determines whether or not the playback button 401 of the recorded music list 40 is selected, thereby determining whether or not the recorded music is played back. If a specific song is selected, the control unit 202 selects music data of the designated song from the music data memory 602 in step S502. In step S503, the music data of the selected song is output to the audio output device 7 to reproduce the selected song.

  If it is determined in step S501 that an instruction to reproduce the recorded song is not received, in step S504, the control unit 202 determines whether there is an instruction to delete the recorded song. Specifically, the control unit 202 determines whether or not there is a song for which the delete button 402 is selected in the recorded song list 40. If there is a song for which the delete button 402 is selected, the control unit 202 controls the music data memory 602 to erase the music data of the corresponding song from the music data memory 602.

  If any of the songs shown in the recorded song list 40 has not been instructed to be reproduced or deleted, the process waits for an instruction as to whether or not to end this mode in step S506. For example, when the display switching button 214 for displaying the music data being broadcast is selected, this mode is terminated and the above-described currently broadcast music list 20 is displayed.

  As described above, while listening to a music program of a specific broadcasting station that is currently broadcasting, it is possible to acquire data relating to the music that is currently being broadcast at another station and display it as a song list. Furthermore, by selecting a desired song from the song list, it is possible to select a broadcasting station that broadcasts the selected song and listen to or record the desired song. Furthermore, the recorded music can be played back or deleted.

  FIG. 13 is a block diagram of a radio receiver according to the third embodiment. A radio receiver according to the third embodiment will be described with reference to FIG. The radio receiver according to the third embodiment is characterized by including a traffic information memory 601 and a music data memory 602. Since other configurations are the same as those in the first and second embodiments, detailed description thereof is omitted. In the radio receiver according to the third embodiment, not only data related to traffic information is received from one broadcasting station, but also data related to a music program is received from another broadcasting station, and both are displayed on the display screen. It is a feature.

  As shown in FIG. 13, when the first broadcasting station 91 is broadcasting a music program, the first tuner unit 21 receives this, and in the same manner as in the first and second embodiments, the sound is output from the audio output device 7. Play as. On the other hand, when the second broadcasting station 92 is broadcasting digital data such as traffic information, the second tuner unit 22 selects the second broadcasting station 92 to acquire traffic information, and traffic Information is stored in the traffic information memory 601.

  Next, when other broadcast stations including the third broadcast station 93 are broadcasting a music program, data related to the currently broadcast music program is stored in the music data memory 602 in the same manner as in the second embodiment. Save and create a song list. Information relating to the traffic information and the song list is output to the display unit 8. Since traffic information is expected to change with the passage of time, it is preferable to receive the traffic information at a high frequency. For this reason, it is preferable to shorten the period for receiving the data broadcast of the broadcasting station that broadcasts the music program and to increase the period for receiving the data broadcast of traffic information.

  FIG. 14 is a display example when traffic information and music information received by the radio receiver of the third embodiment are displayed on the display device. A display example of the traffic information and music information acquired as described above on the display device will be described with reference to FIG. On the display screen of the display device 10, a map 11 acquired from the navigation device 9 and a music list 20 are displayed. Traffic information such as traffic jam information can be displayed on the map 11 as in the first embodiment. Since the music list 20 is the same as that described in the second embodiment, detailed description thereof is omitted.

  As described above, it is possible to create a music list while displaying traffic information and display it on the display device. Therefore, other than the broadcasting station listening to the first tuner unit while acquiring traffic information. It is possible to select a desired song from the songs broadcast on the broadcast station and listen to or record it. In the present embodiment, the map 11 and the music list 20 are displayed side by side. However, either one may be displayed in an enlarged manner, or at least one may not be displayed by the user's selection. You may make it display suitably as desired.

  FIG. 15 is a block diagram of a radio receiver according to the fourth embodiment. A fourth embodiment of the present invention will be described with reference to FIG. The radio receiver according to the fourth embodiment is characterized in that a timer is incorporated. Since other configurations are the same as those of the radio receiver of the second embodiment, detailed description thereof is omitted. In the radio receiver according to the fourth embodiment, since the timer 205 is built in, it is possible to execute playback or recording reservation for a music program broadcast in the near future.

  FIG. 16 is a display example when a broadcast schedule list of music received by the radio receiver of the fourth embodiment is displayed. With reference to FIG. 16, a description will be given of a procedure for reserving or recording a music program broadcast in the near future in the radio receiver of the fourth embodiment. The present embodiment is similar to the second embodiment in that data relating to a music program transmitted from at least one broadcasting station is obtained, but each broadcasting station is not only data relating to the current music program, but also in the near future. It is assumed that data relating to a music program to be broadcast is transmitted.

  Examples of data related to music programs transmitted by a broadcasting station include not only artist names and song names but also scheduled broadcast times, genres, and the like. In the same manner as in the second embodiment, after data related to a music program is acquired from a plurality of broadcasting stations, it is stored in the music data memory 602, and a broadcast schedule list 50 as shown in FIG. 16 is created and displayed on the display device 10. To do. Although FIG. 16 shows an example of sorting by genre, sorting by other items such as broadcast time may be performed.

  Further, a button for instructing reproduction or recording may be added to the broadcast schedule list 50. By attaching a touch panel or the like to the display device 10, the playback button 501 or the recording button 502 can be selected. With respect to the music for which the play button 501 has been selected, at the scheduled broadcast time, as shown in FIG. 15, the control unit 204 receives information from the timer 205 and selects a broadcast station that broadcasts the reserved music. The first tuner unit 21 is controlled. The audio data received by the first tuner unit 21 is output to the audio output device 7, and the designated music piece is reproduced. On the other hand, for the song for which the record button 502 has been selected, at the scheduled broadcast time, as shown in FIG. 15, the control unit 204 receives information from the timer 205 and selects a broadcast station that broadcasts the song designated for recording. The second tuner unit 22 is controlled to select a channel. The second tuner unit 22 receives music data of a song designated for recording, and stores the music data in the music data memory 602. The music data of the recorded song can be output from the music data memory 602 to the audio output device 7 and reproduced.

  FIG. 17 is a flowchart illustrating a procedure for reproducing and recording a song reserved by the radio receiver according to the fourth embodiment. With reference to FIG. 17, a description will be given of a procedure for playing back or recording a song set for playback or recording from the song list displayed in the broadcast schedule list 50. First, in step S601, if there is a playback reservation by the user among the songs displayed in the broadcast schedule list 50, whether the reserved time has been reached by comparing the time information received from the timer 205 by the control unit 204. Judge whether or not. If the playback reservation time is reached, in step S602, the control unit 204 controls the first tuner unit 21 so as to select a broadcasting station that broadcasts a song for which playback reservation is set. Next, in step S603, a digital or analog audio signal broadcast from the broadcasting station selected by the first tuner unit 21 is output to the audio output device 7, thereby reproducing the music reserved for reproduction by the user.

  If there is no playback reservation in step S601, it is determined in step S604 whether or not there is a recording reservation by the user. If there is a recording reservation, the control unit 204 determines the recording reservation time based on the time information from the timer 205. Judge whether or not. When the recording reservation time is reached, in step S605, the control unit 204 controls the second tuner unit 22 so as to select a broadcasting station that broadcasts a song for which recording reservation is set. Next, in step S606, the second tuner unit 22 acquires digital data of the song being broadcast, and stores the acquired digital data in the music data memory 602 in step S607.

  If no playback or recording reservation is set for any of the songs shown in the broadcast schedule list 50, the process waits for an instruction as to whether or not to end this mode in step S608. For example, when the button 503 for displaying music data being broadcast is selected, this mode ends and a list of songs being broadcast is displayed.

  In the above description of the first to fifth embodiments, data related to a music program has been described as an example of the contents of data broadcasting. However, other character data such as news can be displayed in the same manner. For example, a list may be created based on data related to news titles, and the selected news may be reproduced or recorded as sound by selecting as appropriate, or the news may be stored as text data. .

  In addition, the radio receivers of the first to fifth embodiments described above can be mounted on a vehicle, and can also be incorporated in an in-vehicle device such as a navigation device. Further, it can be configured as a home radio receiver or incorporated into a portable terminal, but is not limited thereto.

DESCRIPTION OF SYMBOLS 1 Radio receiver 2 Control part 21 1st tuner part 22 2nd tuner part 31 1st digital IF filter 32 1st analog IF filter 3 2nd digital IF filter 41 1st digital demodulation part 42 1st analog use IF demodulator 4 Second digital IF demodulator 5 Digital / analog audio switching unit 6 Memory 7 Audio output device 8 Display unit 9 Navigation device 10 Display device

Claims (4)

A first tuner for receiving a mixed wave of an analog broadcast signal and a digital broadcast signal transmitted from a first broadcast station;
A first analog demodulator that demodulates an analog broadcast signal received by the first tuner;
A first digital demodulator that demodulates a digital broadcast signal received by the first tuner;
A second tuner for receiving only a digital broadcast signal transmitted from the second broadcast station;
A second digital demodulator that demodulates the digital broadcast signal received by the second tuner;
A control unit for controlling channel selection of the first and second tuners;
A radio receiver comprising: The first tuner receives an audio broadcast signal,
The radio receiver according to claim 1, wherein the second tuner receives a data broadcast signal.   3. The control unit controls the second tuner so as to receive a data broadcast signal transmitted from at least one broadcast station by repeating channel selection and reception of a data broadcast signal every predetermined time. Radio receiver as described in. The controller is
Create a broadcast program list based on the data extracted from the received data broadcast signal,
The radio receiver according to claim 3, wherein the first tuner or the second tuner is controlled so as to select a broadcast station selected from the broadcast program list.

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