JP2002223198A - Audio system and input source switching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an audio system that can properly maintain listening of music by a user. SOLUTION: When acquiring data multiplexed in a broadcast radio wave corresponding to an RDS(radio data system) from a tuner 11, an arithmetic processing section 15 sequentially discriminates whether or not a current program broadcasts music according to a PTY(program type) value included in the data. When the arithmetic processing section 15 discriminates that no music is broadcast while selecting the tuner 11 for an input source, the arithmetic processing section 15 controls changeover switch 14 to select a music reproduction device 12 for the input source and allows the music reproduction device 12 to reproduce prescribed music. Whereas, while selecting the music reproduction device 12 as the input source, when the arithmetic processing section 15 discriminates that music is broadcast, the arithmetic processing section 15 controls the changeover switch 14 to select the tuner 11 for the input source.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio system including a tuner and a predetermined music reproducing device.
In particular, the present invention relates to an audio system and an input source switching method capable of appropriately maintaining a user's listening to music.

[0002]

2. Description of the Related Art An audio system including a tuner for FM broadcasting or the like and a music reproducing device for reproducing a CD (compact disk), an MD (mini disk) or the like is widely used for a vehicle or at home. Such an audio system can switch and output the sound of a tuner (broadcast sound of a music program or a news program) or the sound of a music reproducing device (music sound or the like). That is, the user can arbitrarily select a tuner or a music playback device as an audio input source and listen to desired music or the like.

Hereinafter, a conventional audio system will be described with reference to FIG. FIG. 6 is a block diagram showing an example of a configuration of a conventional audio system. As shown, the audio system includes a receiving antenna 101 for receiving a broadcast wave, a tuner 102 for tuning to the reception frequency of the received broadcast wave and demodulating the sound of a broadcasted program, and music recorded on a CD or the like. Playback device 103 for playing back music, and changeover switch 1 for switching the input source
04, an operation unit 105 including a plurality of operation keys, an amplifier 106 that appropriately amplifies the audio signal of the input source switched by the changeover switch 104, and a speaker 107 that outputs audio according to the audio signal amplified by the amplifier 106. It is composed of The audio system having such a configuration controls the changeover switch 104 in accordance with a user's instruction through the operation unit 105, and selects and switches one of the tuner 102 and the music playback device 103 as an input source. And the audio system
The sound of the switched input source is output from the speaker 107.

[0004] For example, when a user wants to listen to a music program of a specific broadcasting station, the user operates the operation unit 105 to cause the changeover switch 104 to switch the input source to the tuner 102 and to set the desired reception frequency to the tuner 102. Set to 102. On the other hand, when the user wants to listen to music such as a CD, the operation unit 105 is operated to switch the input source to the music playback device 103 using the changeover switch 104 and to instruct the music playback device 103 to play back a desired music. In this way, the audio system can output music or the like by switching the input source according to the operation of the user.

[0005]

However, in the above-described conventional audio system, the user always operates the input source to switch the input source from the tuner 102 to the music playback device 103 and from the music playback device 103 to the tuner 102. The user had to operate the unit 105. For this reason, a user who wants to continue listening to only music can use the operation unit 10.
5, the input source must be switched to the tuner 102 or the music playback device 103 by the changeover switch 104 as needed.

[0006] For example, when music broadcasting ends and a news program starts while the tuner 102 is listening to the received music program, the user operates the operation unit 105 to play back the input source music. Switching to the device 103, the music reproducing device 103 reproduces the desired music. And
In anticipation of the end of the news program or the like, the user operates the operation unit 105 to change the input source to the tuner 10 again.
2 to listen to the music program received by the tuner 102.

Such an operation is not only complicated for the user, but also often makes it difficult to switch the input source at an appropriate timing. For example, if the switching from the tuner 102 to the music playback device 103 is delayed, the user must listen to the sound of a news program or the like, while if the switching from the music playback device 103 to the tuner 102 is delayed, the broadcasted music program Sometimes missed a new song.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an audio system and an input source switching method capable of appropriately maintaining a user's listening to music.

[0009]

To achieve the above object, an audio system according to a first aspect of the present invention comprises:
Receiving means for receiving a broadcast program broadcasted at a predetermined frequency; selecting means for selecting one audio signal as an input source from a plurality of audio sources including audio signals of the broadcast program received by the receiving means; An output unit that converts an audio signal of the input source selected by the selection unit into audio and outputs the audio, a detection unit that detects that a broadcast program received by the reception unit is broadcasting music, and the detection unit And switching control means for controlling the selection means to switch an input source to an audio signal of a broadcast program received by the reception means when a music broadcast is detected.

According to the present invention, the receiving means includes, for example,
A broadcast program broadcast by FM multiplex broadcasting corresponding to RDS is received. The selecting unit selects one audio signal as an input source from a plurality of audio sources (other than a music reproducing device or the like) including the audio signal of the broadcast program received by the receiving unit. The output unit converts the audio signal of the input source selected by the selection unit into audio and outputs the audio. The detecting means detects that the broadcast program received by the receiving means is broadcasting music according to the value of PTY, for example.
When the music broadcast is detected by the detection means, the switching control means controls the selection means to switch the input source to the audio signal of the broadcast program received by the reception means. As a result, it is possible to appropriately maintain listening of music by the user.

[0011] To achieve the above object, an audio system according to a second aspect of the present invention comprises a receiving means for receiving a broadcast program broadcasted at a predetermined frequency, and a music reproducing apparatus for reproducing music recorded on a predetermined recording medium. Music selection means for selecting one of an audio signal of a broadcast program received by the reception means and an audio signal of a music piece reproduced by the music reproduction means as an input source, and a selection means selected by the selection means. Output means for converting the audio signal of the input source into audio and outputting the audio signal, determining means for determining whether or not the broadcast program received by the receiving means is broadcasting music, and controlling the selecting means, When it is determined that the music is being broadcast by the determining means, the input source is switched to the audio signal of the broadcast program received by the receiving means, and the music is broadcast by the determining means. If it is determined that no said music reproducing means input source, characterized in that it comprises a switching control means for switching the audio signal of the music reproduced.

According to the present invention, the receiving means includes, for example,
A broadcast program broadcast by FM multiplex broadcasting corresponding to RDS is received. The music reproducing means reproduces music recorded on a CD or the like, for example. The selection means selects either an audio signal of a broadcast program received by the reception means or an audio signal of a music piece reproduced by the music reproduction means as an input source. The output unit converts the audio signal of the input source selected by the selection unit into audio and outputs the audio. The determining means is, for example, P
According to the value of TY, it is determined whether or not the broadcast program received by the receiving means is broadcasting music. The switching control means controls the selecting means, and switches the input source to the audio signal of the broadcast program received by the receiving means when the determining means determines that the music is being broadcast. Is not broadcast, the input source is switched to the audio signal of the music reproduced by the music reproducing means. As a result, it is possible to appropriately maintain listening of music by the user.

[0013] The receiving means receives a broadcast program including identification information (for example, PTY) for identifying program contents, and the determining means operates according to the identification information included in the broadcast program received by the receiving means. Alternatively, it may be determined whether or not music is being broadcast.

[0014] To achieve the above object, an input source switching method according to a third aspect of the present invention comprises a receiving step of receiving a broadcast program broadcasted at a predetermined frequency, and a music recorded on a predetermined recording medium. A music playback step for playing back
A selection step of selecting any of an audio signal of the broadcast program received in the reception step and an audio signal of the music reproduced in the music reproduction step as an input source; and an input selected in the selection step. An output step of converting a source audio signal into audio and outputting the audio signal; a determination step of determining whether or not the broadcast program received in the reception step is broadcasting music; and broadcasting the music in the determination step. When it is determined that, in the selection step, the input source is switched to the audio signal of the broadcast program received in the receiving step, and when it is determined that the music is not broadcast in the determination step, A switching step of switching an input source to an audio signal of the music reproduced in the music reproduction step in the selection step. The features.

According to the present invention, the receiving step receives, for example, a broadcast program broadcast by FM multiplex broadcasting corresponding to RDS. The music reproduction step reproduces music recorded on a CD or the like. In the selecting step, one of the audio signal of the broadcast program received in the receiving step and the audio signal of the music reproduced in the music reproducing step is selected as an input source. The output step converts the audio signal of the input source selected in the selection step into audio and outputs the audio. In the determining step, for example, it is determined whether or not the broadcast program received in the receiving step is broadcasting music according to the value of PTY. The switching step switches the input source to the audio signal of the broadcast program received in the receiving step in the selecting step when it is determined that the music is being broadcast in the determining step, while playing the music in the determining step. If it is determined that the broadcast is not being broadcast, the input source is switched to the audio signal of the music reproduced in the music reproduction step in the selection step. As a result, listening to music by the user can be appropriately maintained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An audio system according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of an audio system applied to the first embodiment of the present invention. As shown, the audio system
Receiving antenna 10, tuner 11, music playback device 1
2, an operation unit 13, a changeover switch 14, an arithmetic processing unit 15, a memory 16, an amplifier 17, and a speaker 18
And a display unit 19.

The receiving antenna 10 receives a broadcast wave transmitted from a predetermined broadcasting station. Specifically, receiving antenna 1
Numeral 0 receives FM multiplex broadcast corresponding to RDS (Radio Data System) and supplies the received broadcast radio wave to the tuner 11.

The tuner 11 is controlled by the arithmetic processing unit 15, tunes to the reception frequency of the broadcast radio wave received via the reception antenna 10, and demodulates the sound of the broadcast program.
More specifically, the tuner 11 is a tuner that receives and demodulates FM multiplex broadcasting corresponding to RDS, and supplies an audio signal of the demodulated program to the amplifier 17 via the switch 14. Further, the tuner 11 extracts data multiplexed on the broadcast wave, and supplies the extracted data to the arithmetic processing unit 15. The data extracted by the tuner 11 is
This is information in a format as shown in FIG.
TY (program type). The PTY is 5-bit information used to identify the content of the program. For example, as shown in FIG. 2B, the program to be broadcasted is “News”, “News”, Drama ",
Indicates "Pop Music" or the like. And
The tuner 11 supplies the data as shown in FIG. 2A to the arithmetic processing unit 15 sequentially (even when the music reproducing device 12 is selected by the changeover switch 14 described later).

Returning to FIG. 1, the music reproducing apparatus 12 is a player or the like for reproducing a medium such as a CD (compact disk) or an MD (mini disk) on which music is recorded. The music reproduction device 12 is controlled by the arithmetic processing unit 15 to reproduce music recorded on a CD or the like, and supplies an audio signal such as music sound accompanying the reproduction to the amplifier 17 via the switch 14.

The operation unit 13 includes a plurality of button keys and the like arranged on an operation panel, and supplies predetermined instruction information to the arithmetic processing unit 15 according to a user operation. For example, the operation unit 13 supplies, to the arithmetic processing unit 15, instruction information for instructing the tuner 11 to receive a desired broadcast program (reception frequency) in accordance with a user operation.

The changeover switch 14 is a two-input / 1-output contact switch or the like, and has an input side connected to the tuner 11 and the music reproducing device 12 and an output side connected to the amplifier 17. The changeover switch 14 is controlled by the arithmetic processing unit 15, selects and switches one of the tuner 11 and the music playback device 12 as an input source, and is electrically connected to the amplifier 17.

The arithmetic processing unit 15 has a CPU (Central Proc).
essing Unit) and controls the entire audio system. Specifically, when the arithmetic processing unit 15 obtains the data multiplexed on the broadcast wave as shown in FIG. 2A from the tuner 11, the music in the current program is played according to the value of the PTY included in the data. It is sequentially determined whether or not broadcast is being performed. When the value of PTY is a value indicating music such as “Pop Music” in FIG. 2B, the arithmetic processing unit 15 determines that music is being broadcast in the current program. And the arithmetic processing unit 15
When it is determined that music is not being broadcast in a state where the input source is the tuner 11, the changeover switch 14 is controlled to switch the input source to the music playback device 12, and the music playback device 12 plays a predetermined music. Let it. On the other hand, when it is determined that music is being broadcast in a state where the input source is the music reproducing device 12, the arithmetic processing unit 15 controls the changeover switch 14 to switch the input source to the tuner 11.

The memory 16 has a ROM (Read Only Memory).
y), a random access memory (RAM), and the like, and stores predetermined information necessary for the arithmetic processing unit 15 to control the changeover switch 14, the tuner 11, and the like. For example, the memory 16 stores information indicating the current input source (the tuner 11 or the music playback device 12) selected by the changeover switch 14, and the like.

The amplifier 17 includes a predetermined amplifier circuit and the like, amplifies the audio signal supplied from the tuner 11 or the music reproducing device 12 via the changeover switch 14 as appropriate, and supplies the amplified audio signal to the speaker 18.

The speaker 18 is composed of a stereo speaker or the like, and outputs sound (music sound or the like) according to the sound signal amplified by the amplifier 17.

The display unit 19 includes a fluorescent display tube, a liquid crystal display unit, and the like, and displays symbols, messages, and the like indicating the operation status of the audio system. For example, the display unit 19 displays a symbol or the like indicating the current input source (the tuner 11 or the music playback device 12) selected by the changeover switch 14.

Hereinafter, the operation of the audio system according to the first embodiment of the present invention will be described with reference to FIG. FIG. 3 is a flowchart for explaining the music source switching process executed by the arithmetic processing unit 15. The music source switching process is started after the user instructs the automatic switching of the music source via the operation unit 13.

First, the arithmetic processing unit 15 sets a reception frequency in the tuner 11 in accordance with a user's instruction via the operation unit 13 (step S11). That is, the arithmetic processing unit 15 sets the reception frequency of the broadcast station corresponding to the RDS broadcast in the tuner 11.

The arithmetic processing unit 15 inputs the broadcast data received by the tuner 11 (step S12). That is, the arithmetic processing unit 15 is configured to execute the processing shown in FIG.
The data multiplexed in the broadcast wave as shown in FIG.

The arithmetic processing unit 15 determines whether PTY has been detected (step S13). That is, it is determined whether or not PTY for identifying the program content is included in the multiplexed data.

When the arithmetic processing unit 15 determines that the PTY has not been detected, the processing returns to step S12. On the other hand, when it is determined that PTY has been detected, the arithmetic processing unit 1
No. 5 determines whether or not the value indicates music (step S14). That is, the arithmetic processing unit 15 determines whether the value of PTY is a value indicating music such as “Pop Music” in FIG. 2B.

If the arithmetic processing unit 15 determines that the PTY is a value indicating music, it determines whether or not the sound of the music reproducing device 12 is being output (step S15). That is, the arithmetic processing unit 15 determines whether or not the music playback device 12 is being selected by the changeover switch 14 in the current state where music is being broadcast.

When it is determined that the sound of the music reproducing device 12 is not being output (the sound of the tuner 11 is being output), the arithmetic processing unit 15 returns the process to the above-described step S12. That is, since the sound of the tuner 11 is being output in the current state where music is being broadcast, the changeover switch 1
Then, the process returns to step S12 without changing step 4. On the other hand, when it is determined that the sound of the music playback device 12 is being output, the arithmetic processing unit 15
4 is switched to music from the tuner 11 (step S16). That is, in the current state where music is being broadcast, since the sound of the music reproducing device 12 is being output, the switch 14 is controlled to switch the input source to the tuner 11. After the switching, the arithmetic processing unit 15
Returns the process to step S12 described above.

If it is determined in step S14 that the PTY is not a value indicating music, the arithmetic processing unit 15
It is determined whether or not the sound of the tuner 11 is being output (step S17). That is, the arithmetic processing unit 15 controls the tuner 11 by the changeover switch 14 in a state where music is not broadcast (news programs and the like are broadcast).
It is determined whether or not the state is selected.

When it is determined that the sound of the tuner 11 is not being output (the sound of the music reproducing device 12 is being output), the arithmetic processing unit 15 returns the processing to step S12 described above. That is, in the current situation where a news program or the like is being broadcast, since the sound of the music playback device 12 is being output,
The process returns to step S12 without switching the changeover switch 14. On the other hand, when it is determined that the sound of the tuner 11 is being output, the arithmetic processing unit 15 controls the changeover switch 14 to switch to the music from the music playback device 12 (step S18). That is, since the sound of the tuner 11 is being output in the current situation where a news program or the like is being broadcast, the switch 14 is controlled to switch the input source to the music reproducing device 12. After the switching, the arithmetic processing unit 15 returns the processing to step S12 described above.

As described above, by the music source switching process,
According to the value of PTY, it is determined whether or not the program being received by the tuner 11 is broadcasting music. According to the determination result, the changeover switch 14 is controlled to switch the input source appropriately. For example, when a news program or the like starts while the user is listening to a music program received by the tuner 11, the arithmetic processing unit 15 sets
It is determined that the broadcasting of the music has ended, and the changeover switch 14
Is controlled to switch the input source to the music playback device 12 and to cause the music playback device 12 to play a predetermined music. Then, when the news program or the like ends and the music program starts, the arithmetic processing unit 15 determines that music broadcasting has started according to the value of PTY, controls the changeover switch 14 and changes the input source to the tuner again. Switch to 11.

Therefore, the user can continue to listen to music without listening to a news program or the like. Further, since the input source is switched at an appropriate timing, for example, switching from the music reproducing device 12 to the tuner 11 is not delayed, and a broadcasted music program does not miss a new song or the like. As a result, it is possible to appropriately maintain listening of music by the user.

In the above embodiment, the case where FM multiplex broadcasting corresponding to RDS is received has been described.
Even when receiving an FM broadcast or the like that does not support S, it may be determined whether or not music is being broadcast from the audio signal of the program, and the input source may be appropriately switched. Less than,
An audio system applied to the second embodiment of the present invention will be described with reference to the drawings.

The configuration of the audio system applied to the second embodiment of the present invention is almost the same as the audio system according to the first embodiment shown in FIG. However, the tuner 11 is a tuner that receives and demodulates FM broadcasts that do not support RDS. The tuner 11 supplies the demodulated program audio signal to the amplifier 17 via the changeover switch 14 and also sends the demodulated program audio signal to the arithmetic processing unit 15. Supply. The arithmetic processing unit 15 includes a DSP (Digital Signal Processor) or the like. When the program audio signal is obtained from the tuner 11, the arithmetic processing unit 15 filters out a human voice band component (for example, 1 to 3 kHz) from the audio signal by filtering. To cut other band components. Then, it is determined whether the broadcast is monaural or stereo from the audio signal after the cut.
Further, the arithmetic processing unit 15 detects a signal level difference at the time of blanking when music broadcasting is changed to broadcasting of news or the like (silent time) or at the time of blanking when broadcasting of news or the like is changed to broadcasting of music. At the same time, it is determined whether or not music is being broadcast in the current program.

The music source switching process performed by the arithmetic processing unit 15 in the audio system according to the second embodiment having such a configuration will be described with reference to the flowchart shown in FIG. The illustrated music source switching process according to the second embodiment of the present invention is started after the user instructs the automatic switching of the music source via the operation unit 13.

First, the arithmetic processing unit 15 sets a reception frequency in the tuner 11 in accordance with a user's instruction via the operation unit 13 (step S21). It is assumed that the user is listening to the music program received by the tuner 11 first. The arithmetic processing unit 15 inputs the broadcast audio signal received by the tuner 11 (step S22). The arithmetic processing unit 15 determines whether or not there is a level difference before and after the sound is blank (when there is no sound) (step S23).

When it is determined that there is no level difference, the arithmetic processing unit 15 determines whether or not the sound of the music reproducing device 12 is being output (step S24). That is, the arithmetic processing unit 15 determines whether or not the music playback device 12 is being selected by the changeover switch 14 in the current state where music is being broadcast.

When it is determined that the sound of the music reproducing device 12 is not being output (the sound of the tuner 11 is being output), the arithmetic processing unit 15 returns the process to the above-described step S22. On the other hand, when it is determined that the sound of the music reproducing device 12 is being output, the arithmetic processing unit 15 controls the changeover switch 14 to switch to the music from the tuner 11 (step S25). After the switching, the arithmetic processing unit 15
Returns the process to step S22 described above.

If it is determined in step S23 that there is a level difference before and after the blank, the arithmetic processing unit 1
5 cuts the band component (step S26). That is, the arithmetic processing unit 15 cuts off other band components while leaving the band components of the human voice from the audio signal by filtering.

The arithmetic processing section 15 determines whether or not the audio signal from which the band component has been cut is composed of only monaural components (step S27). The arithmetic processing unit 15
If it is determined that it is not only a monaural component (a stereo component is included), the process returns to step S24 described above.
On the other hand, when determining that there is only a monaural component, the arithmetic processing unit 15 determines whether or not the sound of the tuner 11 is being output (step S28). That is, the arithmetic processing unit 15 determines whether or not the tuner 11 is selected by the changeover switch 14 in the current state where music is not being broadcast (news programs and the like are being broadcast).

When the arithmetic processing unit 15 determines that the sound of the tuner 11 is not being output (the sound of the music reproducing device 12 is being output), the processing returns to the above-described step S22. On the other hand, when it is determined that the sound of the tuner 11 is being output, the arithmetic processing unit 15
4 is switched to music from the music playback device 12 (step S29).

As described above, by the music source switching process,
From the audio signal of the program, it is determined whether or not the program received by the tuner 11 is broadcasting music, and the input source is appropriately switched by controlling the changeover switch 14 according to the determination result or the like. Therefore, the user can continue to listen to music without listening to a news program or the like. Further, since the input source is switched at an appropriate timing, for example, switching from the music reproducing device 12 to the tuner 11 is not delayed, and a new music or the like is not missed in a broadcast music program. As a result, it is possible to appropriately maintain listening of music by the user.

In the above-described first and second embodiments, a case has been described in which the input source is appropriately switched and music is always output. On the contrary, programs other than music such as a news program may be used. Can be applied to the case where the input source is appropriately switched to output the sound of a news program or the like when is broadcast. For example, when the sound quality of the broadcast received by the tuner 11 is not very good, the user generally wants to listen to the music reproduced by the music reproducing device 12 without listening to the broadcast music. However, a broadcasted news program or the like may be desired to be listened to. Hereinafter, a source switching process according to another embodiment of the present invention will be described with reference to a flowchart shown in FIG. FIG. 5 shows an FM corresponding to the RDS.
The case of receiving a multiplex broadcast will be described as an example.
As described above, the present invention can be applied to a case where an FM broadcast or the like that does not support RDS is received.

First, the arithmetic processing section 15 causes the music reproducing apparatus 12 to start reproducing an arbitrary musical piece in accordance with a user's instruction via the operation section 13 (step S31). The arithmetic processing unit 15 inputs the data of the broadcast received by the tuner 11 in the state set to the reception frequency of the broadcast station corresponding to the RDS broadcast (step S32). Arithmetic processing unit 15
Determines whether a PTY has been detected (step S3).
3).

When the arithmetic processing unit 15 determines that PTY has not been detected, the processing returns to step S32. On the other hand, when it is determined that PTY has been detected, the arithmetic processing unit 1
No. 5 determines whether the value is other than music (step S34). When the arithmetic processing unit 15 determines that the PTY is a value indicating a value other than music, the arithmetic processing unit 15 determines whether the sound of the music reproducing device 12 is being output (step S35).
That is, the arithmetic processing unit 15 determines whether or not the music playback device 12 is being selected by the changeover switch 14 in the current state where a news program or the like is being broadcast.

When it is determined that the sound of the music reproducing device 12 is not being output (the sound of the tuner 11 is being output), the arithmetic processing unit 15 returns the process to the above-described step S32 as it is. On the other hand, when it is determined that the sound of the music playback device 12 is being output, the arithmetic processing unit 15 controls the switch 14 to switch to the broadcast received by the tuner 11 (step S36). After the switching, the arithmetic processing unit 15 returns the processing to step S32 described above.

When it is determined in step S34 that the PTY is not a value indicating music other than music (a value indicating music), the arithmetic processing unit 15 determines whether or not the sound of the tuner 11 is being output. Is determined (step S37). That is, the arithmetic processing unit 15 determines whether or not the tuner 11 is selected by the changeover switch 14 in the current state where music is being broadcast.

When it is determined that the sound of the tuner 11 is not being output (the sound of the music reproducing device 12 is being output), the arithmetic processing unit 15 returns the process to the above-described step S32 as it is. On the other hand, when it is determined that the sound of the tuner 11 is being output, the arithmetic processing unit 15
4 is switched to music from the music playback device 12 (step S38).

As described above, by the source switching process, PT
According to the value of Y, it is determined whether or not the program received by the tuner 11 is broadcasting news or the like. According to the determination result, the changeover switch 14 is controlled to switch the input source appropriately.

In the first and second embodiments, the input source is switched by controlling the changeover switch 14 in order to maintain the user's listening to music.
1 may be switched to a music program of another broadcast station or the like. For example, when receiving the FM multiplex broadcast corresponding to the RDS, the arithmetic processing unit 15 determines that the music is not broadcast according to the value of the PTY, and the AF (Alternative Frequency), PI (Alternative Frequency) included in the FM multiplex radio wave. Program
Identification) and PS (Program Service Nam)
e) Search for another broadcast station according to the information such as e) and receive a music program. Also in this case, it is possible to appropriately maintain listening of music by the user.

[0057]

As described above, according to the present invention,
It is possible to appropriately maintain listening of music by the user.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of an audio system according to a first embodiment of the present invention.

FIG. 2A is a schematic diagram illustrating an example of a format of data included in an FM multiplex received by a tuner;
(B) is a schematic diagram showing an example of a specific value of a PTY code.

FIG. 3 is a flowchart illustrating a music source switching process according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating a music source switching process according to a second embodiment of the present invention.

FIG. 5 is a flowchart illustrating a source switching process according to another embodiment of the present invention.

FIG. 6 is a block diagram illustrating an example of a configuration of a conventional audio system.

[Explanation of symbols]

 Reference Signs List 10 receiving antenna 11 tuner 12 music reproducing device 13 operation unit 14 changeover switch 15 arithmetic processing unit 16 memory 17 amplifier 18 speaker 19 display unit

Claims (4)

[Claims] 1. A receiving means for receiving a broadcast program broadcast at a predetermined frequency, and one audio signal is selected as an input source from a plurality of audio sources including an audio signal of the broadcast program received by the receiving means. Selecting means, output means for converting the audio signal of the input source selected by the selecting means into sound and outputting the sound, and detecting means for detecting that the broadcast program received by the receiving means is broadcasting music. Switching control means for controlling the selection means to switch an input source to an audio signal of a broadcast program received by the receiving means when the music broadcasting is detected by the detecting means. Audio system. 2. A receiving means for receiving a broadcast program broadcasted at a predetermined frequency; a music reproducing means for reproducing music recorded on a predetermined recording medium; an audio signal of the broadcast program received by the receiving means; Selecting means for selecting any of the audio signals of the music reproduced by the music reproducing means as an input source; output means for converting the audio signal of the input source selected by the selecting means into audio and outputting; Determining means for determining whether or not the broadcast program received by the means is broadcasting music; and controlling the selecting means to determine whether an input source is present when the determining means determines that the music is being broadcast. Is switched to the audio signal of the broadcast program received by the receiving means, and when it is determined that the music is not being broadcast by the determining means, the input source is set to the music reproduced by the music reproducing means. Audio system, characterized in that it comprises between the switching control means for switching the audio signal. 3. The receiving means receives a broadcast program including identification information for identifying program contents, and the determining means plays music according to the identification information included in the broadcast program received by the receiving means. The audio system according to claim 2, wherein it is determined whether or not broadcasting is being performed. 4. A receiving step of receiving a broadcast program broadcasted at a predetermined frequency; a music reproducing step of reproducing music recorded on a predetermined recording medium; and a sound of the broadcast program received at the receiving step. A signal and an audio signal of the music reproduced in the music reproduction step as an input source; and an output of converting the audio signal of the input source selected in the selection step into audio and outputting the audio. A step of determining whether or not the broadcast program received in the receiving step is broadcasting music; and a step of determining if the broadcast program is broadcasting music in the determining step. The input source is switched to the audio signal of the broadcast program received in the receiving step, and it is determined in the determining step that music is not being broadcast. When the input source switching method, characterized in that it and a switching step of switching the audio signal of the music reproduced by the music reproducing step the input source in the selection step.