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DESCRIPTION JP2006253744

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DESCRIPTION JP2006253744
PROBLEM TO BE SOLVED: To provide a sound output control device for controlling sound output
at a volume level desired by a user. SOLUTION: A sound output control device 100a acquires the
volume of an output sound, compares the volume of the output sound with a predetermined set
volume, and outputs when the volume of the output sound does not match the set volume.
Control to match the volume of the sound to the set volume. Further, the sound output control
device 100a notifies the user of an abnormality in the output volume by an alarm sound or an
alarm screen when an event in which the value of the output volume is out of the set volume
range continues a predetermined number of times. When the event that the value of the output
volume exceeds the set volume range continues a predetermined number of times, the output
sound is cut off. [Selected figure] Figure 1
Sound output control device
[0001]
The present invention relates to a sound output control device that controls the volume of an
output sound.
[0002]
In various audio devices such as a CD (compact disc) player and a DVD (digital versatile disc)
player, sound output is controlled by various methods in order to prevent damage to hardware
such as circuits and amplifiers.
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For example, in the technology described in Patent Document 1, when an output abnormality
occurs, the output of the amplifier is shut off. JP 2002-44799 A
[0003]
The above-described conventional sound output control technique is intended to prevent
hardware damage, and is not control that takes into consideration the output sound that is
actually heard by the user. That is, if the volume is such that the hardware is not damaged, the
control of the sound output is not performed even if the sound output at the volume desired by
the user is not performed.
[0004]
An object of the present invention is to solve the above-mentioned problems, and to provide a
sound output control device that controls sound output at a volume level desired by the user.
[0005]
The sound output control device according to the present invention comprises a volume
acquisition means for acquiring the volume of the output sound, a set volume holding means for
holding a predetermined set volume, and the volume and the setting of the output sound
acquired by the volume acquisition means. When the volume of the output sound is judged not to
coincide with the set volume by the volume comparison means for comparing the set volume
held in the volume holding means and the volume comparison means, the volume of the output
sound is set And volume control means for performing control to match the volume.
[0006]
With this configuration, sound output control is performed by feedback of the output sound, and
the volume of the output sound matches the set volume if the volume of the obtained output
sound does not match the set volume.
Therefore, when the user sets the set volume to a desired volume, sound output at the desired
volume becomes possible.
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[0007]
Further, in the sound output control device of the present invention, the set volume is a volume
of a predetermined range specified by the upper limit volume and the lower limit volume.
[0008]
With this configuration, control is performed to bring the output sound close to the volume
desired by the user, and the sound output control is prevented from being repeated until it is
completely matched.
For this reason, when the output sound can not be perfectly matched with the volume desired by
the user due to the hardware configuration etc., the processing load due to the sound output
control can be reduced.
[0009]
Further, the sound output control device of the present invention has an output sound blocking
means for blocking the output sound when the volume of the output sound acquired by the
volume acquiring means exceeds the set volume.
[0010]
This configuration prevents the output of an excessive volume of sound.
[0011]
Further, in the sound output control device of the present invention, the output sound blocking
means cuts off the output sound when the volume of the output sound exceeds the set volume
continuously a plurality of times.
[0012]
Further, the sound output control device of the present invention has alarm output means for
outputting an alarm when the volume of the output sound acquired by the volume acquisition
means does not match the set volume.
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[0013]
With this configuration, the user can recognize the volume abnormality of the output sound.
[0014]
Further, in the sound output control device according to the present invention, the alarm output
unit outputs the alarm when the volume of the output sound does not coincide with the set
volume plural times in a row.
[0015]
According to the present invention, sound output control is performed by feedback of the output
sound, and sound output at a volume desired by the user can be achieved.
[0016]
Hereinafter, embodiments of the present invention will be specifically described with reference to
the drawings.
[0017]
FIG. 1 is a block diagram of a first sound output control apparatus according to an embodiment
of the present invention.
The sound output control device 100a shown in the figure constitutes an audio output stage of
various audio devices such as players of CDs and DVDs, receivers of radio broadcasts and
television broadcasts.
The sound output control device 100 a includes an operation unit 102, a volume analysis /
control unit 104, a set volume holding unit 106, an audio amplification unit 108, an audio
attenuation unit 110, speakers 112 and 114, and a display unit 116.
[0018]
The operation unit 102 includes a knob (volume adjustment knob) (not shown) for volume
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adjustment, and is operated when the user issues an instruction regarding volume setting.
The volume analysis / control unit 104 controls the volume of the sound (output sound) output
from the speaker 112 by controlling the sound attenuation unit 110 in accordance with the
user's operation instruction regarding volume setting.
The set volume holding unit 106 holds the value of the set volume according to the user's
volume setting instruction.
[0019]
The audio amplification unit 108 amplifies and outputs an analog audio signal.
The sound attenuation unit 110 attenuates the amplified sound signal under the control of the
sound volume analysis / control unit 104 and outputs the sound signal to the speaker 112.
That is, the audio signal is once amplified by the audio amplification unit 108 and then
attenuated by the audio attenuation unit 110 according to the volume desired by the user.
The speaker 112 performs audio output according to the attenuated audio signal.
[0020]
Further, the volume analysis / control unit 104 analyzes the volume of the output sound, and
controls the speaker 114 and the display unit 116 to notify the user of an alarm when an
abnormality occurs in the volume.
The speaker 114 and the display unit 116 notify the user of an alarm when an abnormality
occurs in the volume of the output sound, and the speaker 114 controls a predetermined alarm
sound by the control of the volume analysis / control unit 104. The display unit 116 outputs a
predetermined alarm screen.
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[0021]
Hereinafter, the operation of the sound output control device 100a will be described in detail.
FIG. 2 is a first flowchart showing the operation of the sound output control device 100a. The
user operates the volume adjustment knob provided on the operation unit 102 to issue an
instruction regarding volume setting. The operation unit 102 outputs an operation signal to the
sound volume analysis / control unit 104 according to the user's operation. The volume analysis
/ control unit 104 receives the operation signal and receives an instruction on volume setting
(S101).
[0022]
Next, the sound volume analysis / control unit 104 stores the set sound volume in the set sound
volume holding unit 106 according to the received instruction regarding the sound volume
setting (S102). FIG. 3 is a diagram showing an example of the correspondence between the set
volume of the operation unit 102 and the operation amount of the volume adjustment knob. The
set volume is a volume of a predetermined range specified by the upper limit volume value and
the lower limit volume value with the value of the volume instructed by the user (instruction
volume value) as a center, and is represented by the shaded area in FIG. . The set volume is in
proportion to the operation amount of the volume adjustment knob.
[0023]
Furthermore, the volume analysis / control unit 104 controls the sound attenuation unit 110
based on the set volume. When the sound attenuation unit 110 receives the amplified sound
signal from the sound amplification unit 108, the sound attenuation unit 110 performs
predetermined attenuation processing so that the amplitude of the sound signal becomes the
amplitude corresponding to the set volume range, and the speaker 112 Output to The speaker
112 performs audio output according to the attenuated audio signal (output audio signal). As a
result, the volume of the output sound is controlled within the set volume range (S103).
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[0024]
FIG. 4 is a second flowchart showing the operation of the sound output control device 100a.
When the output sound signal from the sound attenuation unit 110 is input, the sound volume
analysis / control unit 104 analyzes the amplitude of the output sound signal, and obtains the
sound volume (output sound volume) according to the amplitude (S201).
[0025]
Next, the volume analysis / control unit 104 reads out the set volume held in the set volume
holding unit 106. Further, the volume analysis / control unit 104 compares the value of the
output volume with the range of the set volume, and determines whether the value of the output
volume is within the range of the set volume (S202). When the value of the output volume is
within the set volume range, the output volume is normal. In this case, a series of operations end.
[0026]
On the other hand, when the value of the output volume is out of the set volume range, the
output volume is not desired by the user and is abnormal. An abnormality in the output volume
occurs due to, for example, the occurrence of a failure in the attenuation processing of the audio
signal by the audio attenuation unit 110. In this case, the volume analysis / control unit 104
determines whether or not an event in which the value of the output volume is out of the set
volume range has continued a predetermined number of times (S203). For example, each time
the sound volume analysis / control unit 104 determines in S202 whether the value of the
output sound volume is within the set volume range, the sound volume analysis / control unit
104 holds the determination result. Then, the volume analysis / control unit 104 determines
whether or not an event in which the value of the output volume has become out of the set
volume range continues a predetermined number of times, using the held predetermined number
of determination results in the past. Determine
[0027]
When an event in which the value of the output volume is out of the set volume range continues
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a predetermined number of times, the volume analysis / control unit 104 outputs an alarm sound
signal to the speaker 114 and outputs alarm screen data to the display unit 116. . The speaker
114 outputs a predetermined alarm sound corresponding to the alarm sound signal, and the
display unit 116 displays a predetermined alarm screen based on the alarm screen data. The user
can recognize that the output volume abnormality has occurred by listening to the alarm sound
or looking at the alarm screen (S204).
[0028]
Furthermore, the volume analysis / control unit 104 tries to control the audio attenuation unit
110 so that the output volume falls within the set volume range (S205). The specific control is
the same as the control in S103 of FIG. Also, when it is determined that the event in which the
value of the output volume is out of the set volume range does not continue a predetermined
number of times in S203, the volume analysis / control unit 104 similarly sets the output volume
within the set volume range. The control of the voice attenuation unit 110 is attempted so as to
be inside (S205).
[0029]
FIG. 5 is a third flowchart showing the operation of the sound output control device 100a. When
the output sound signal from the sound attenuation unit 110 is input, the sound volume analysis
/ control unit 104 analyzes the amplitude of the output sound signal and obtains an output
sound volume according to the amplitude (S301).
[0030]
Next, the volume analysis / control unit 104 reads out the set volume held in the set volume
holding unit 106. Further, the volume analysis / control unit 104 determines whether the value
of the output volume exceeds the set volume range (S302). If the value of the output volume does
not exceed the set volume range, the series of operations ends.
[0031]
On the other hand, when the value of the output volume exceeds the set volume range, the
volume analysis / control unit 104 determines whether or not an event in which the output
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volume value exceeds the set volume range has continued a predetermined number of times
(S303). ).
[0032]
When an event in which the value of the output volume exceeds the set volume range continues
a predetermined number of times, the volume analysis / control unit 104 instructs the sound
attenuation unit 110 to stop the output of the sound signal.
The voice attenuation unit 110 stops the output of the voice signal according to this instruction.
Thereby, the output sound from the speaker 112 is cut off (S304).
[0033]
On the other hand, if the volume analysis / control unit 104 determines in S303 that the event
that the value of the output volume exceeds the range of the set volume is not continuous for a
predetermined number of times, the output volume falls within the range of the set volume.
Then, control of the voice attenuation unit 110 is tried (S305). The specific control is the same as
the control in S103 of FIG.
[0034]
As described above, the sound output control device 100a performs sound output control by
feedback of the output sound signal, and when the event that the value of the output sound
volume is out of the set sound volume range continues a predetermined number of times, In
response to this, an alarm sound or an alarm screen is used to notify of an output volume
abnormality. Further, the sound output control device 100a shuts off the output sound when an
event in which the value of the output volume exceeds the set volume range continues a
predetermined number of times.
[0035]
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Therefore, audio output at a volume desired by the user is possible. Further, the warning
notification can allow the user to recognize an abnormality in the output volume, and can
prevent the voice output from being performed at an excessive volume by blocking the output
voice.
[0036]
Note that both the operation shown in FIG. 4 and the operation shown in FIG. 5 may be
combined. Specifically, when an event that the value of the output volume falls below the set
volume range continues a predetermined number of times, the volume analysis / control unit
104 outputs an alarm sound signal to the speaker 114 to output an alarm sound. The alarm
screen data is output to the display unit 116 to display the alarm screen. On the other hand,
when an event that the value of the output volume exceeds the set volume range continues a
predetermined number of times, the volume analysis / control unit 104 outputs an alarm sound
signal to the speaker 114 to output an alarm sound and warn the display unit 116 The screen
data is output to display the alarm screen, and the voice attenuation unit 110 is instructed to
stop the output of the voice signal, and the voice output from the speaker 112 is cut off.
[0037]
In the embodiment described above, the volume analysis / control unit 104 receives the output
audio signal from the audio attenuation unit 110 and analyzes the amplitude of the output audio
signal to obtain the output volume. The output sound volume may be obtained by detecting the
sound that is actually output.
[0038]
FIG. 6 is a block diagram of a second sound output control device according to the embodiment
of the present invention.
As compared with the sound output control device 100 a shown in FIG. 1, the sound output
control device 100 b shown in the same figure is provided with the microphone 118 in front of
the speaker 112. The microphone 118 collects the sound output from the speaker 112, and
outputs the signal of the sound to the volume analysis / control unit 104. The sound volume
analysis / control unit 104 analyzes the amplitude of the audio signal from the microphone 118
and obtains an output sound volume according to the amplitude. Thereafter, as described above,
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the volume analysis / control unit 104 compares the value of the output volume with the range
of the set volume.
[0039]
Further, in the above-described embodiment, when notifying the warning of the volume
abnormality, the output of the alarm sound from the speaker 114 and the display of the alarm
screen on the display unit 116 are performed. A warning notification may be made.
[0040]
As described above, the sound output control device according to the present invention has the
effect of enabling control of sound output at a volume desired by the user, and is useful as a
sound output control device.
[0041]
It is a block diagram of a 1st sound output control apparatus.
It is a first flowchart showing the operation of the first sound output control device.
It is a figure which shows an example of setting sound volume. It is a 2nd flow chart which shows
operation of the 1st sound output control device. It is a third flowchart showing the operation of
the first sound output control device. It is a block diagram of a 2nd sound output control
apparatus.
Explanation of sign
[0042]
100a, 100b Sound output control device 102 Operation unit 104 Volume analysis / control unit
106 Setting volume holding unit 108 Audio amplification unit 110 Audio attenuation unit 112,
114 Speaker 116 Display unit 118 Microphone
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