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DESCRIPTION JP2002223198

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DESCRIPTION JP2002223198
[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 apparatus, and more
particularly 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 and a
music reproducing apparatus for reproducing a CD (compact disc), an MD (mini disc) or the like
is widely used for in-vehicle use and home use. Such an audio system can switch and output the
sound of a tuner (broadcast sound such as a music program or a news program) or the sound of
a music reproduction apparatus (musical sound or the like). That is, the user can arbitrarily select
a tuner or a music playback device as an audio input source, and can listen to desired music and
the like.
[0003]
Hereinafter, a conventional audio system will be described with reference to FIG. FIG. 6 is a block
diagram showing an example of the 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
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tuning the received frequency of the received broadcast wave, and demodulating the sound of a
program to be broadcast, and music recorded on a CD or the like. A music playback device 103
for playing back, a switch 104 for switching an input source, an operation unit 105 including a
plurality of operation keys, and an amplifier 106 for appropriately amplifying an audio signal of
the input source switched by the switch 104; It is comprised from the speaker 107 which
outputs an audio | voice according to the audio | voice signal amplified by the amplifier 106. FIG.
The audio system having such a configuration controls the changeover switch 104 in accordance
with a user's instruction via the operation unit 105, and selects and switches one of the tuner
102 and the music playback device 103 as an input source. Then, the audio system outputs the
sound of the switched input source from the speaker 107.
[0004]
For example, when the user wants to listen to a music program of a specific broadcast station, the
user operates the operation unit 105 to cause the changeover switch 104 to switch the input
source to the tuner 102 and set a desired reception frequency to the tuner 102. Do. On the other
hand, when it is desired to listen to music such as a CD, the operation unit 105 is operated to
cause the changeover switch 104 to switch the input source to the music reproduction device
103 and to instruct the music reproduction device 103 to reproduce desired music. Thus, the
audio system can switch input sources and output music and the like according to the user's
operation.
[0005]
However, the above-described conventional audio system always operates by the user in order to
switch the input source from the tuner 102 to the music reproducing apparatus 103 and from
the music reproducing apparatus 103 to the tuner 102. I had to operate part 105. Therefore, a
user who wants to keep listening to only music needs to operate the operation unit 105 at any
time to switch the input source to the tuner 102 or the music reproduction apparatus 103 with
the switch 104.
[0006]
For example, when listening to a music program received by the tuner 102 and the broadcast of
music ends and a news program or the like starts, the user operates the operation unit 105 to
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input an input source to the music reproduction apparatus 103. Then, the desired music piece is
reproduced by the music reproduction device 103. Then, at the end of the news program etc., the
user operates the operation unit 105 to switch the input source to the tuner 102 again, and
listens to the music program received by the tuner 102.
[0007]
Such an operation is not only complicated for the user, but often it is difficult to switch the input
source at an appropriate timing. For example, when switching from the tuner 102 to the music
playback device 103 is delayed, it is necessary to listen to the sound of a news program or the
like. On the other hand, when switching from the music playback device 103 to the tuner 102 is
delayed, the broadcasted music program Sometimes missed a new song etc.
[0008]
The present invention has been made in view of the above-mentioned circumstances, and an
object of the present invention is to provide an audio system and an input source switching
method capable of properly maintaining the user's listening to music.
[0009]
In order 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 broadcast on 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, and output means
for converting the audio signal of the input source selected by the selecting means into voice and
outputting A detection means for detecting that the broadcast program received by the reception
means is broadcasting music; and when the music detection is detected by the detection means,
the selection means is controlled to input the input source And switching control means for
switching to an audio signal of the broadcast program received by the receiving means.
[0010]
According to the present invention, the receiving means receives a broadcast program broadcast
by, for example, FM multiplex broadcasting corresponding to RDS.
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The selection means selects one audio signal as an input source from a plurality of audio sources
(in addition, music playback devices etc.) including audio signals of the broadcast program
received by the reception means.
The output means converts the voice signal of the input source selected by the selection means
into voice and outputs it. The detection means detects that the broadcast program received by
the reception means broadcasts music, for example, according to the value of PTY. The switching
control means controls the selecting means to switch the input source to the audio signal of the
broadcast program received by the receiving means, when the broadcast of music is detected by
the detecting means. As a result, the user can properly maintain the listening of music.
[0011]
In order to achieve the above object, an audio system according to a second aspect of the present
invention comprises: receiving means for receiving a broadcast program broadcast on a
predetermined frequency; and music reproduction for reproducing music recorded on a
predetermined recording medium Means, selecting means for selecting any one of the audio
signal of the broadcast program received by the receiving means and the audio signal of the
music reproduced by the music reproducing means as the input source, and the input source
selected by the selecting means An output means for converting an audio signal into a voice and
outputting it, a determination means for determining whether or not a broadcast program
received by the receiving means is broadcasting music, and controlling the selection means
When it is determined that music is being broadcast, the input source is switched to the audio
signal of the broadcast program received by the receiving means, and it is determined that the
music is not being broadcast by the determining means If it, said music reproducing means input
source, characterized in that it comprises a switching control means for switching the audio
signal of the music reproduced.
[0012]
According to the present invention, the receiving means receives a broadcast program broadcast
by, for example, FM multiplex broadcasting corresponding to RDS.
The music reproduction means reproduces, for example, music recorded on a CD or the like. The
selection means selects, as the input source, either an audio signal of the broadcast program
received by the reception means or an audio signal of the music reproduced by the music
reproduction means. The output means converts the voice signal of the input source selected by
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the selection means into voice and outputs it. The determination means determines, for example,
whether or not the broadcast program received by the reception means is broadcasting music,
according to the value of PTY. The switching control means controls the selecting means to
switch the input source to the audio signal of the broadcast program received by the receiving
means when it is determined that the music is being broadcasted by the judging means, while the
music is Is determined to be not broadcast, the input source is switched to the audio signal of the
music reproduced by the music reproduction means. As a result, the user can properly maintain
the listening of music.
[0013]
The receiving means receives a broadcast program including identification information (for
example, PTY) for identifying program contents, and the determination means performs music
according to the identification information contained in the broadcast program received by the
receiving means. It may be determined whether it is broadcasting.
[0014]
In order to achieve the above object, an input source switching method according to a third
aspect of the present invention includes a receiving step of receiving a broadcast program
broadcasted at a predetermined frequency, and reproducing music recorded on a predetermined
recording medium. A music reproduction step, a selection step of selecting any one of an audio
signal of a broadcast program received in the reception step and an audio signal of a music
reproduced in the music reproduction step as an input source; An output step of converting an
audio signal of the selected input source into voice and outputting it, a determination step of
determining whether the broadcast program received in the reception step is broadcasting music,
and the determination step When it is determined that music is being broadcast, the input source
is cut into an audio signal of the broadcast program received in the reception step in the
selection step. And a switching step of switching the input source to an audio signal of the music
reproduced in the music reproduction step in the selection step when it is judged that the music
is not broadcast in the judgment step It features.
[0015]
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 the music recorded on the CD or the like.
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In the selection step, either the audio signal of the broadcast program received in the reception
step or the audio signal of the music reproduced in the music reproduction step is selected as the
input source. The output step converts the voice signal of the input source selected in the
selection step into voice and outputs it. In the determining step, for example, it is determined
whether 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 in
the determining step that music is being broadcast, while the music is selected in the determining
step. If it is determined that it is not 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, the user
can properly maintain the listening of music.
[0016]
DETAILED DESCRIPTION OF THE INVENTION An audio system according to an embodiment of
the present invention will be described below with reference to the drawings.
[0017]
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 illustrated, the audio system includes a reception antenna 10, a tuner 11, a music
reproduction device 12, an operation unit 13, a changeover switch 14, an arithmetic processing
unit 15, a memory 16, an amplifier 17, and a speaker 18 And the display unit 19.
[0018]
The receiving antenna 10 receives the airwaves transmitted from a predetermined broadcasting
station. Specifically, the receiving antenna 10 receives an FM multiplex broadcast compatible
with RDS (Radio Data System), and supplies the received broadcast wave to the tuner 11.
[0019]
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The tuner 11 is controlled by the arithmetic processing unit 15, tunes to the reception frequency
of the airwaves received via the reception antenna 10, and demodulates the voice and the like of
the broadcasted program. Specifically, the tuner 11 is a tuner that receives and demodulates FM
multiplex broadcasting compatible with RDS, and supplies the audio signal of the demodulated
program to the amplifier 17 via the changeover switch 14. Further, the tuner 11 extracts the
data multiplexed in the airwaves, and supplies the extracted data to the arithmetic processing
unit 15. The data extracted by the tuner 11 is information in a format as shown in FIG. 2A, and
includes PTY (program type). This PTY is 5-bit information used to identify the content of a
program, and for example, as shown in FIG. 2B, according to the value, the program to be
broadcast is "News", " Indicates "Drama", "Pop Music", etc. Then, the tuner 11 sequentially
supplies data as shown in FIG. 2A to the arithmetic processing unit 15 (even in a state where the
music playback device 12 is selected by the switch 14 described later). .
[0020]
Returning to FIG. 1, the music reproduction device 12 is a player or the like that reproduces a
medium such as a CD (Compact Disc) or an MD (Mini Disc) 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 changeover switch 14.
[0021]
The operation unit 13 includes a plurality of button keys and the like arranged on the operation
panel, and supplies predetermined instruction information to the arithmetic processing unit 15 in
accordance with the operation of the user. For example, the operation unit 13 supplies the
arithmetic processing unit 15 with instruction information for instructing the tuner 11 to receive
a desired broadcast program (reception frequency) according to the operation of the user.
[0022]
The changeover switch 14 is a 2-input / 1-output contact switch or the like, and the input side is
connected to the tuner 11 and the music reproduction device 12, and the output side is
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connected to the amplifier 17. The changeover switch 14 is controlled by the arithmetic
processing unit 15 to select and switch any one of the tuner 11 and the music reproduction
device 12 as an input source, and electrically connect the amplifier 17.
[0023]
The arithmetic processing unit 15 includes a CPU (Central Processing Unit) and the like, and
controls the entire audio system. Specifically, when the arithmetic processing unit 15 acquires
from the tuner 11 data as shown in FIG. 2A multiplexed in the airwaves, the music in the current
program is in accordance with the PTY value contained in the data. It judges one by one whether
it is broadcast or not. If 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. Then, when it is determined that the music is not broadcast in the state where the input
source is the tuner 11, the arithmetic processing unit 15 controls the changeover switch 14 to
switch the input source to the music playback device 12, and the music playback device 12 Play
a predetermined song. On the other hand, when it is determined that music is being broadcast in
the state where the input source is the music reproduction device 12, the arithmetic processing
unit 15 controls the switch 14 to switch the input source to the tuner 11.
[0024]
The memory 16 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the
like, and stores predetermined information necessary for the arithmetic processing unit 15 to
control the changeover switch 14 and the tuner 11 and the like. For example, the memory 16
stores information indicating the current input source (the tuner 11 or the music player 12)
selected by the changeover switch 14.
[0025]
The amplifier 17 is formed of a predetermined amplification circuit or the like, appropriately
amplifies the audio signal supplied from the tuner 11 or the music reproduction device 12
through the changeover switch 14, and supplies the amplified audio signal to the speaker 18.
[0026]
The speaker 18 is composed of a stereo speaker or the like, and outputs a sound (such as music
sound) in accordance with the sound signal amplified by the amplifier 17.
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[0027]
The display unit 19 includes a fluorescent display tube, a liquid crystal display unit, and the like,
and displays a symbol, a message, and the like indicating the operating 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 switch 14.
[0028]
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 performed 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.
[0029]
First, the arithmetic processing unit 15 sets the reception frequency in the tuner 11 in
accordance with the user's instruction via the operation unit 13 (step S11). That is, the
processing unit 15 sets the reception frequency of the broadcast station corresponding to the
RDS broadcast in the tuner 11.
[0030]
The arithmetic processing unit 15 inputs data of the broadcast received by the tuner 11 (step
S12). That is, the arithmetic processing unit 15 inputs the data multiplexed in the airwaves as
shown in FIG. 2A extracted by the tuner 11.
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[0031]
The arithmetic processing unit 15 determines whether PTY has been detected (step S13). That is,
it is determined whether or not PTY for identifying program contents is included in the
multiplexed data.
[0032]
If the arithmetic processing unit 15 determines that PTY is not detected, the process returns to
step S12. On the other hand, when it is determined that PTY is detected, the arithmetic
processing unit 15 determines whether 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.
[0033]
When the arithmetic processing unit 15 determines that PTY is a value indicating music, the
arithmetic processing unit 15 determines whether the sound of the music reproduction device
12 is being output (step S15). That is, the arithmetic processing unit 15 determines whether or
not the music reproduction device 12 is selected by the changeover switch 14 in the current
state where music is being broadcast.
[0034]
When it is determined that the sound of the music reproduction device 12 is not being output
(the sound of the tuner 11 is being output), the arithmetic processing unit 15 returns the process
to step S12 described above. That is, since the sound of the tuner 11 is being output in the
current state where music is being broadcast, the process returns to the step S12 without
switching the changeover switch 14. On the other hand, when it is determined that the sound of
the music reproduction 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 S16). That is, in the current
state where music is being broadcasted, since the sound of the music reproduction device 12 is
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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.
[0035]
When it is determined in step S14 that PTY is not a value indicating music, the arithmetic
processing unit 15 determines whether the sound of the tuner 11 is being output (step S17).
That is, the arithmetic processing unit 15 determines whether or not the tuner 11 is selected by
the changeover switch 14 under the present situation where no music is broadcast (a news
program or the like is broadcast).
[0036]
When it is determined that the sound of the tuner 11 is not being output (the sound of the music
reproduction device 12 is being output), the arithmetic processing unit 15 returns the process to
the above-described step S12. That is, in the current situation where news programs and the like
are being broadcasted, the sound of the music reproduction device 12 is being output, so 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 switch 14 to switch to the music from the music reproduction 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 reproduction device 12. After the switching, the arithmetic processing unit
15 returns the process to step S12 described above.
[0037]
Thus, according to the music source switching process, it is determined whether the program
being received by the tuner 11 is broadcasting music according to the value of PTY, and the
changeover switch 14 is controlled and input according to the determination result and the like.
The source is switched as appropriate. For example, in the state where the user listens to the
music program received by the tuner 11, when the news program etc. starts, the arithmetic
processing unit 15 determines that the broadcast of the music has ended according to the value
of PTY, and switches The switch 14 is controlled to switch the input source to the music
reproduction device 12 and cause the music reproduction device 12 to reproduce a
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predetermined music. Then, when the news program etc. is over and the music program is
started, the arithmetic processing unit 15 determines that the music broadcasting has started
according to the value of PTY, controls the changeover switch 14 and retunes the input source
Switch to 11.
[0038]
Thus, the user can continue to listen to music without listening to news programs and the like.
Further, since the input source is switched at an appropriate timing, for example, there is no
delay in switching from the music reproduction device 12 to the tuner 11, and there is no chance
to miss a new song or the like in a broadcast music program. As a result, the user can properly
maintain the listening of music.
[0039]
In the above embodiment, although the case of receiving FM multiplex broadcasting compatible
with RDS has been described, even in the case of receiving FM broadcasting etc. not compatible
with RDS, is music being broadcasted from the audio signal of the program? It may be
determined whether or not to switch the input source as appropriate. Hereinafter, an audio
system applied to a second embodiment of the present invention will be described with reference
to the drawings.
[0040]
The configuration of the audio system applied to the second embodiment of the present
invention is substantially 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 not
compatible with RDS, and supplies the audio signal of the demodulated program to the amplifier
17 through the changeover switch 14 and also to the arithmetic processing unit 15 Supply.
Further, the arithmetic processing unit 15 is composed of a DSP (Digital Signal Processor) or the
like, and when an audio signal of a program is acquired from the tuner 11, filtering removes the
band component (for example, 1 to 3 kHz) of human voice from the audio signal. Cut other band
components. Then, it is determined from the audio signal after cutting whether the broadcast is
monaural or stereo. In addition, the arithmetic processing unit 15 detects the level difference of
the signal at the blank time (when silent) changing from broadcasting of music to broadcasting
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such as news or at the blanking time changing from broadcasting such as news to broadcasting
of music, At the same time, it is determined whether music is being broadcast in the current
program.
[0041]
In the audio system according to the second embodiment having such a configuration, the music
source switching process performed by the arithmetic processing unit 15 will be described with
reference to the flowchart shown in FIG. The music source switching process according to the
second embodiment of the present invention shown in the drawing is started after an instruction
to automatically switch music sources is given by the user via the operation unit 13.
[0042]
First, the arithmetic processing unit 15 sets the reception frequency in the tuner 11 in
accordance with the 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 an audio signal of the broadcast received by the tuner 11 (step S22). The
arithmetic processing unit 15 determines whether or not there is a level difference before and
after voice blanking (silence) (step S23).
[0043]
When it is determined that there is no level difference, the arithmetic processing unit 15
determines whether the sound of the music reproduction device 12 is being output (step S24).
That is, the arithmetic processing unit 15 determines whether or not the music reproduction
device 12 is selected by the changeover switch 14 in the current state where music is being
broadcast.
[0044]
When it is determined that the sound of the music reproduction device 12 is not being output
(the sound of the tuner 11 is being output), the arithmetic processing unit 15 returns the process
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to step S22 as it is. On the other hand, when it is determined that the sound of the music
reproduction 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 switching, the
arithmetic processing unit 15 returns the process to step S22 described above.
[0045]
When it is determined in step S23 that there is a level difference before and after blanking, the
processing unit 15 cuts the band component (step S26). That is, the arithmetic processing unit
15 leaves the band component of the human voice from the voice signal by filtering, and cuts the
other band components.
[0046]
The arithmetic processing unit 15 determines whether the audio signal whose band component
has been cut is composed of only a monaural component (step S27). If the arithmetic processing
unit 15 determines that only monaural components are included (stereo components are
included), the process returns to step S24 described above. On the other hand, if it is determined
that only monaural components are present, the arithmetic processing unit 15 determines
whether 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 under
the present situation where no music is broadcast (a news program or the like is broadcast).
[0047]
If the arithmetic processing unit 15 determines that the sound of the tuner 11 is not being
output (the sound of the music reproduction 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 controls the changeover switch 14 to
switch to the music from the music reproduction device 12 (step S29).
[0048]
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As described above, it is determined from the audio signal of the program whether or not the
program being received by the tuner 11 is broadcasting music from the audio signal of the
program by the music source switching process, and the changeover switch 14 is controlled
according to the determination result. The input source is switched as appropriate. Thus, the user
can continue to listen to music without listening to news programs and the like. In addition, since
the input source is switched at an appropriate timing, for example, there is no delay in switching
from the music reproduction device 12 to the tuner 11, and there is no chance to miss a new
song or the like in a broadcast music program. As a result, the user can properly maintain the
listening of music.
[0049]
In the first and second embodiments described above, the case where music is constantly output
by switching the input source as appropriate has been described. Conversely, programs other
than music such as a news program are broadcasted. In this case, the present invention is also
applicable to the case where the input source is appropriately switched to output the sound of a
news program or the like. For example, when the sound quality of the broadcast received by the
tuner 11 is not very good, the user would like to listen to the music to be reproduced by the
music reproduction device 12 in principle without listening to the music to be broadcast.
However, it is a case where the news program etc. which are broadcasted want to listen. Source
switching processing according to another embodiment of the present invention will be
described below with reference to the flowchart shown in FIG. Although the case of receiving FM
multiplex broadcasting compatible with RDS is described as an example in FIG. 5, the present
invention is also applicable to the case of receiving FM broadcasting etc. not compatible with RDS
as shown in FIG. It is possible.
[0050]
First, the arithmetic processing unit 15 causes the music reproduction device 12 to start
reproduction of an arbitrary music according to an instruction of the user via the operation unit
13 (step S31). The arithmetic processing unit 15 inputs data of the broadcast received by the
tuner 11 in a state set to the reception frequency of the broadcast station corresponding to the
RDS broadcast (step S32). The arithmetic processing unit 15 determines whether PTY has been
detected (step S33).
[0051]
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15
If the arithmetic processing unit 15 determines that PTY is not detected, the process returns to
step S32. On the other hand, when it is determined that PTY has been detected, the arithmetic
processing unit 15 determines whether the value indicates something other than music (step
S34). When the arithmetic processing unit 15 determines that PTY is a value indicating
something other than music, the arithmetic processing unit 15 determines whether the sound of
the music reproduction device 12 is being output (step S35). That is, the arithmetic processing
unit 15 determines whether or not the music reproduction device 12 is selected by the changeover switch 14 in the current state where a news program or the like is broadcast.
[0052]
When it is determined that the sound of the music reproduction 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 S 32 as it is. On the other hand, when it is determined that the sound
of the music reproduction device 12 is being output, the arithmetic processing unit 15 controls
the changeover switch 14 to switch to the broadcast received by the tuner 11 (step S36). After
switching, the arithmetic processing unit 15 returns the process to step S32 described above.
[0053]
When it is determined in step S34 that PTY is not a value indicating anything other than music (it
is a value indicating music), the arithmetic processing unit 15 determines whether the sound of
the tuner 11 is being output. (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.
[0054]
When it is determined that the sound of the tuner 11 is not being output (the sound of the music
reproduction 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 controls the switch 14 to switch
to the music from the music reproduction device 12 (step S38).
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[0055]
As described above, according to the source switching processing, it is determined whether the
program received by the tuner 11 is broadcasting news or the like according to the value of PTY,
and the switching switch 14 is controlled to be input according to the determination result or the
like. The source is switched as appropriate.
[0056]
In the first and second embodiments described above, in order to maintain the user's listening to
music, the changeover switch 14 is controlled to switch the input source, but the tuner 11 is
controlled to control other broadcast stations. It may be switched to a music program etc.
For example, when receiving FM multiplex broadcasting compatible with RDS, if the arithmetic
processing unit 15 determines that music is not broadcast according to the value of PTY, AF
(Alternative Frequency), PI (IF) included in the FM multiplex radio wave According to information
such as Program Identification) and PS (Program Service Name), another broadcast station is
searched to receive a music program. Also in this case, the user can appropriately maintain the
listening of music.
[0057]
As described above, according to the present invention, the user can properly maintain the
listening of music.
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