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JPH10145884

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DESCRIPTION JPH10145884
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
volume control apparatus incorporating a headphone jack and an audio process controller.
[0002]
2. Description of the Related Art FIG. 2 is a block diagram showing the configuration of a
conventional volume control apparatus. The conventional volume control apparatus shown in
FIG. 2 includes an audio process controller (hereinafter referred to as A.PRO) 4 for controlling
the sound quality, volume, balance and the like of the input audio signal and a user 17 Based on
requirements (control signals such as sound quality, volume and balance), A. Control means 2 for
outputting a control signal (data) for controlling the operation of the PRO 4; an operation
program of the control means 2 itself; A memory 1 for storing control data of PRO 4 and control
signals (data) and the like input from the controller 17; An audio output amplifier 5 for
amplifying an audio signal output from the PRO 4 and an audio signal from the audio output
amplifier 5 are connected to the headphone jack 7 via a headphone jack 7 (not shown). In this
case, the headphone 6 is not connected to the headphone, and the speaker 6 is connected to the
speaker 6 when the headphone (headphone plug) is not connected. Configured
[0003]
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FIG. 3 is a view showing an example of the headphone jack and the switch means. 3 (a) shows a
state in which no headphone (headphone plug) is connected to the headphone jack 7, and FIG. 3
(b) shows that the headphone (headphone plug 9) is connected to the headphone jack 7. Each of
the states is shown.
[0004]
Now, as shown in FIG. 3A, in the state where the headphone plug 9 is not connected to the
headphone jack 7, for example, the audio signal R input to the terminal 13 and the terminal 14 of
the headphone jack 7 is a terminal The signal is supplied from the terminal 13 to the R-side
speaker 6 'through the terminal 12 and output as a sound wave. In the figure, the contact
provided on the terminal 14 and the contact provided on the terminal 12 are physically joined by
the insulator (solid) 10 (the contact provided on the terminal 14 and the terminal 12 Moves or
deforms in the same manner as the contacts provided on the Further, in the figure, the audio
signal L and the L side speaker are omitted since they are the same as the R side.
[0005]
On the other hand, as shown in FIG. 3B, in the state where the headphone plug 9 is connected
(inserted) to the headphone jack 7, the contactor provided with the audio signal R input to the
terminal 14 at the terminal 14 The audio signal L supplied from the tip 18 of the headphone
plug 9 to the R side of the headphone (not shown) and input to the terminal 15 is supplied from
the ring 19 of the headphone plug 9 via a contact provided at the terminal 15 They are
respectively supplied to the L side of headphones (not shown). At this time, the contact provided
on the terminal 14 is moved to the upper side of the figure by the tip 18 of the headphone plug
9, and the insulator 10 is moved to the upper side (arrow direction) of the figure. Along with this,
the contact provided at the terminal 12 is also moved upward in the figure, and the terminals 13
and 12 are not in contact with each other, and the supply of the audio signal R to the R side
speaker 6 'is stopped The same applies to the L side speaker).
[0006]
Next, the operation of the conventional volume control apparatus configured as described above
will be described. A. The volume level of the audio signal input to the PRO 4 is controlled by the
control unit 2 based on the user's request (sound quality, volume, balance, etc.) input from the
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controller 17, amplified by the audio output amplifier 5, and the head The signal is output to the
speaker 6 or a headphone (not shown) via the switch means 8 integral with the horn jack 7. That
is, when the headphone plug 9 of FIG. 3 is connected to the headphone jack 7, the audio signal is
output to the headphone, and when the headphone plug 9 is not connected, the audio signal is
output to the speaker 6, respectively. It has become so.
[0007]
At this time, A.1. The control of the PRO 4 is performed regardless of whether the headphone
plug 9 is connected to the headphone jack 7 or not. That is, A. The level (sound volume) of the
audio signal input to the PRO 4 is the same whether the output means is the headphone or the
speaker 6 (regardless of which one). Set by PRO4.
[0008]
Therefore, for example, when the user inserts the headphone plug 9 into the headphone jack 7
while wearing the headphone, the high-sensitivity headphone suddenly outputs a large volume,
which causes great discomfort to the user. In some cases, there is a problem that it may cause a
serious situation (such as tympanic membrane damage).
[0009]
On the other hand, when using a low sensitivity headphone, the volume is increased to listen to
music etc. When the headphone plug 9 is removed from the headphone jack 7 for some reason,
the speaker 6 is used. There is a problem that a loud volume is suddenly output from the
terminal, which may surprise the user as well as the people in the vicinity (providing great
discomfort) and possibly cause a serious accident.
[0010]
Furthermore, when the audio output means is changed from the speaker to the headphone or
when the headphone is changed to the speaker in a state where the volume is constant (the
output level of A. PRO 4 is constant), the optimum volume level (A. PRO 4) There is a problem
that the operation of changing the output level of) is necessary and it is troublesome.
[0011]
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As described above, since the volume level (the output level from A. PRO) is constant regardless
of whether the audio output means is a speaker or a headphone, the sound can be generated
using the speaker. When you are listening to (when the headphone plug is not inserted into the
headphone jack) and when you are using the headphone to listen to audio (when the headphone
plug is inserted into the headphone jack), A gap occurs in the output level (sound pressure value).
Therefore, the operation for changing is performed one by one so that the volume level (the
output level from A. PRO) becomes appropriate according to the case of listening to the voice
using the speaker and the case of listening to the voice using the headphone. I needed to do it.
[0012]
Therefore, in view of such problems, the present invention has an object to provide a volume
control device for automatically controlling the volume level to an appropriate level in each state
where the headphone plug is not inserted into the headphone jack. It is said that.
[0013]
A volume control apparatus according to the present invention detects whether or not a
headphone plug is inserted into a headphone jack, and outputs a detection result. And volume
level adjustment means for adjusting the volume level of the input audio signal, and the volume
level of the audio signal to be output by controlling the volume level adjustment means based on
the detection result of the headphone insertion detection means. And control means for varying
the level.
[0014]
The volume control device according to the invention of claim 2 is the volume control device
according to claim 1, wherein the detection means is turned on in a state in which a headphone
plug is inserted into the headphone jack and a state in which the headphone plug is not inserted.
Or a switch means for changing the off state, and a headphone insertion detection means for
detecting the on / off state of the switch means and outputting a detection result, the control
means comprising the volume level adjustment means A memory is provided to store a plurality
of volume levels set in the past.
[0015]
According to the invention as set forth in claim 1 or 2, it is detected whether or not the
headphone plug is inserted into the headphone jack, and the audio signal outputted from the
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volume level adjusting means based on the detection result. Means for varying the volume level
of the voice output means, for example, as an audio output means, an audio signal of an
appropriate volume level for each of the audio output means immediately after changing from
the speaker to the headphone or from the headphone to the speaker Are supplied from the
volume level adjusting means.
[0016]
In the volume control apparatus according to the third aspect of the present invention, when the
control means detects a state in which the headphone plug is inserted into the headphone jack,
the volume level before the headphone plug is inserted By controlling the volume level adjusting
means so that an audio signal of a predetermined and predetermined volume level which is
irrelevant is output, for example, a headphone plug in a state in which the user wears a
headphone Even when inserted into the jack, an audio output with an appropriate volume level is
performed from the headphone, a large volume is suddenly output, and it is possible to prevent
the user from experiencing a great deal of discomfort.
[0017]
In the sound volume control apparatus according to claim 4, when the control means detects a
state in which the headphone plug is inserted into the headphone jack, it is stored in the memory
by user designation. The volume level adjustment means is controlled to output an audio signal
of a previous volume level immediately before the headphone jack is pulled out of the headphone
plug or a volume level previously set by the user. An audio output at a volume level desired by
the user is produced from the headphone.
[0018]
In the volume control apparatus according to the fifth aspect of the present invention, when the
control means detects a state in which the headphone plug is pulled out of the headphone jack,
the volume control device has nothing to do with the volume level before the headphone plug is
pulled out. By controlling the sound volume level adjusting means so that an audio signal of a
predetermined sound volume level is output in advance, for example, the user uses a headphone
to increase the sound volume to view music etc. Even when the headphone plug is pulled out of
the headphone jack for some reason, the audio output with the proper volume level is achieved,
the loud volume is suddenly output, and the user and the people around them are It is possible to
prevent surprises (providing great discomfort).
[0019]
In the sound volume control apparatus according to claim 6, when the control means detects a
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state in which the headphone plug is pulled out of the headphone jack, the head is stored in the
memory according to user's designation. The user controls the volume level adjusting means to
output an audio signal of the previous volume level immediately before the headphone plug is
inserted into the horn jack or the volume level previously set by the user. An audio output at a
desired volume level is obtained.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of a volume control apparatus according to the
present invention.
[0021]
The volume control apparatus of the present invention in FIG. 1 comprises an audio process
controller (A. PRO) 4 for controlling the sound quality, volume, balance and the like of an input
audio signal; An audio output amplifier 5 for amplifying an audio signal output from the PRO 4
and an audio signal from the audio output amplifier 5 are connected to the headphone jack 7 via
a headphone jack 7 (not shown). A switch means 8 'integrally formed with the headphone jack 7
for switching and outputting the audio signal to the headphone when the headphone plug 9 is
not connected to the headphone when the headphone plug 9 is connected; The headphone
insertion detection means 3 which detects the state of the switch means 8 'and outputs the result
(detection signal), the request from the user inputted from the controller 17 (control signal such
as sound quality, volume and balance) and the head Based on the detection signal from the horn
insertion detection means 3, A.1. Control means 2 for outputting a control signal (data) for
controlling the operation of PRO 4 and an operation program of control means 2 itself, A. The
control data of PRO 4, the control signal (data) input from the controller 17, and the memory 1
for storing the detection signal and the like.
[0022]
Further, the switch means 8 'integrally formed with the headphone jack 7 has, for example, a
terminal 11 and a contactor provided on the terminal 11 in the configuration of the switch
means 8 shown in FIG. 3A. The terminal 11 and the terminal 12 of the switch means 8 ′ are
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connected to the headphone insertion detection means 3 as shown in FIG. 3 (c).
As a result, when the headphone plug 9 is not inserted into the headphone jack 7, the terminals
11 and 12 of the switch means 8 'are opened (turned off), and the headphone plug 9 is
connected to the headphone jack 7. When it is inserted, the insulator 10 moves in the direction
of the arrow (upward in the figure), and the space between the terminal 11 and the terminal 12
is closed (on).
That is, the headphone insertion detection means 3 detects ON / OFF between the terminal 11
and the terminal 12, and based on the result, the detection signal (the headphone plug 9 is
inserted into the headphone jack 7 or not ) Is output to the control means 2.
[0023]
Next, the operation of the sound volume control apparatus of the present invention configured as
described above will be described.
A. The volume level of the audio signal input to the PRO 4 is controlled by the control unit 2
based on the user's request (sound quality, volume, balance, etc.) input from the controller 17,
amplified by the audio output amplifier 5, and the head The signal is output to the speaker 6 or a
headphone (not shown) via the switch means 8 'integral with the horn jack 7.
That is, when the headphone plug 9 of FIG. 3 is connected to the headphone jack 7, the audio
signal is output to the headphone, and when the headphone plug 9 is not connected, the audio
signal is output to the speaker 6, respectively. It has become so.
[0024]
Now, it is assumed that the audio signal is output from the speaker 6.
In this state, if the headphone plug 9 is inserted into the headphone jack 7 and the means for
outputting the audio signal is changed from the speaker 6 to a headphone not shown, the
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terminal 11 of the switch means 8 'integral with the headphone jack 7 And, the terminal 12 is
turned on, the headphone insertion detection means 3 detects that the headphone plug 9 is
inserted into the headphone jack 7, and notifies the control means 2 of that (detection signal).
Then, the control means 2 having received the notification of this detection signal, for example,
the sound volume level (output level from A. PRO) is a predetermined predetermined
(appropriate level) sound volume stored in the memory 1 As soon as the level (the output level
from A. PRO) is reached. Control PRO4.
Thereafter, the user operates the controller 17 to change the volume level so as to obtain a
comfortable headphone output (volume).
As a result, when the user inserts the headphone plug 9 into the headphone jack 7 while wearing
the headphone, the high-sensitivity headphone suddenly outputs a large volume, which causes a
great discomfort to the user. In some cases, it is possible to prevent the occurrence of serious
situations (such as damage to the tympanic membrane) in advance.
[0025]
Also, when the user operates the controller 17 to change the headphone output (volume) to be
comfortable, the control means 2 is the volume level (output level from A. PRO, and the
headphone plug 9 in the past). Is stored in the memory 1 immediately before it is pulled out of
the headphone jack 7 or at a timing designated by the user.
As a result, when the output means of the audio signal is changed from the speaker 6 to a
headphone (not shown) after that (after the user-desired comfortable volume level is stored in
the memory 1), that is, When the horn plug 9 is inserted, the predetermined (appropriate level)
predetermined volume level stored in the memory 1 as the volume level of the headphone output
or the comfortable volume level desired by the user Any volume level can be selected by the user,
for example, by the controller 17.
[0026]
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Next, assuming that the headphone plug 9 is pulled out of the headphone jack 7 and the output
means of the audio signal is changed from the headphone (not shown) to the speaker 6 in a state
where the audio signal is outputted from the headphone (not shown). The terminals 11 and 12 of
the switch means 8 'integral with the headphone jack 7 are turned off, and the headphone
insertion detection means 3 detects that the headphone plug 9 has been pulled out of the
headphone jack 7, and that effect ( The detection signal is notified to the control means 2.
Then, the control means 2 having received the notification of the detection signal follows, for
example, a predetermined procedure stored in the memory 1, from the sound volume level
(output level from A. PRO) 0 for a predetermined time. As soon as A. PRO is reached, a
predetermined (appropriate level) predetermined sound level (output level from A. PRO) is
obtained. Control PRO4 (fade in control). Thereafter, the user operates the controller 17 to adjust
(change) the volume level so as to obtain a comfortable speaker output (volume). As a result, if
the headphone plug 9 is removed from the headphone jack 7 for some reason, for example, when
the volume is increased (high volume) to view music etc. using the headphone, the speaker 6 can
be used. As a result, a loud volume is suddenly output, which can surprise the user as well as the
people around him (or cause a great deal of discomfort), and can prevent the occurrence of a
serious accident or the like in some cases.
[0027]
Also, when the user operates the controller 17 to change the comfortable speaker output
(volume), the control means 2 is the volume level (the output level from A. PRO, and the
headphone plug 9 in the past). Is stored in the memory 1 immediately before it is inserted into
the headphone jack 7 or at a timing designated by the user. As a result, when the output means
of the audio signal is changed from the headphone (not shown) to the speaker 6 (that is, from the
headphone jack 7 to the head) (after the user-desired comfortable volume level is stored in the
memory 1) When the horn plug 9 is removed, the predetermined (appropriate level) volume level
stored in the memory 1 as the volume level of the speaker output after the fade-in, or the userdesired comfortable level For example, the controller 17 can be configured to be selected by the
user to be any of the volume levels.
[0028]
As described above, according to the present invention, the headphone process is carried out by
providing a means for detecting whether or not the headphone plug is in a state of being inserted
into the headphone jack. A.PRO) control (volume level control) is performed, so the problem that
occurs from the sound pressure gap due to the difference in the type of audio output means
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(speaker, headphone, etc.), ie, sudden loudness from the speaker or headphone Is output, it is
possible to prevent problems such as giving the user or the person around them a surprise and
giving a great deal of discomfort, etc., and a volume that does not require complicated operations
such as volume adjustment. A control device can be provided.
[0029]
Brief description of the drawings
[0030]
1 is a block diagram showing an embodiment of the volume control device of the present
invention.
[0031]
2 is a block diagram showing a configuration of a conventional volume control device.
[0032]
3 is a diagram showing an example of a headphone jack and a switch means.
[0033]
Explanation of sign
[0034]
DESCRIPTION OF SYMBOLS 1 ... Memory 2 ... Control means 3 ... Headphones insertion detection
means 4 ... Audio process controller (A. PRO) 5 ... Audio output amplifier 6 ... Speaker 7 ...
Headphone jack 8 '... Switch means 17 ... Controller
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