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JP2010004206

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2010004206
A speaker device capable of causing an audio beam to reach a listening position even if the
installation direction of the speaker array is changed. A rotation angle sensor (14) is provided.
The user uses the user I / F 11 to input the indoor shape and the installation position of the
speaker device. The control unit 12 controls the signal processing unit 15 based on the value
input from the user I / F 11 and the value input from the rotation angle sensor 14 to adjust the
output angle of the audio beam. For example, let “output angle at reference angle−angle
change” be the output angle after adjustment. [Selected figure] Figure 2
Speaker apparatus and speaker system
[0001]
The present invention relates to a speaker apparatus provided with a speaker array that outputs
an audio beam.
[0002]
2. Description of the Related Art Conventionally, a speaker array for beaming voice and
outputting it is known.
As shown in FIG. 1A, using this speaker array, sound beams are reflected on the wall surface, and
each channel of multi-channel surround sound is made to reach from behind the listener (user)
or the like. (See, for example, Patent Document 1).
09-05-2019
1
[0003]
In order for the sound beam of each channel to be reflected by the wall to reach the user, the
output angle of the sound beam must be adjusted according to the installation position and the
listening position of the speaker array. Therefore, it has been proposed to set a microphone at
the listening position to sweep an audio beam, obtain an angle at which the audio beam reaches
from the level of the collected audio, and automatically set an output angle (for example, see
Patent Document 2) ). JP, 2004-363695, A JP, 2006-13711, A
[0004]
However, as shown in FIG. 1B, when the user contacts the speaker array or the like to change the
installation direction of the speaker array, the angle of the sound beam with respect to the wall is
changed, and the sound beam reaches the listening position. It will be gone.
[0005]
In addition, in the case of an integrated speaker array with a television that rotates in the
horizontal direction or the vertical direction, the speaker array also rotates in accordance with
the rotation of the television.
Therefore, the audio beam does not reach the listening position as shown in FIG.
[0006]
It is extremely troublesome for the user if the measurement as in the device of Patent Document
2 is performed every time the installation direction of the speaker array changes.
[0007]
Therefore, an object of the present invention is to provide a speaker apparatus capable of
causing an audio beam to reach a listening position even when the installation direction of the
speaker array is changed.
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2
[0008]
A speaker apparatus according to the present invention is a speaker apparatus provided with a
speaker array for outputting sound beams of a plurality of channels, and includes: an angle
detection means for detecting an angle change of a sound emitting surface with respect to a
preset reference angle; And adjusting means for adjusting an output angle of the voice beam.
[0009]
As described above, even if the installation direction of the speaker device is changed in order to
provide the rotation angle sensor, detect the change in angle (change in installation direction)
from the reference plane, and adjust the output angle of the audio beam. The audio beam can
reach the listening position.
[0010]
The adjusting means may be configured to adjust the output angle of the sound beam other than
the sound beam of the center channel.
[0011]
Even if the installation direction of the speaker device is changed, if the user moves in that
direction and the relative positional relationship does not change, it is not necessary to adjust the
output angle for the center channel.
Therefore, it is set as an aspect adjusted about an audio beam other than a center channel.
[0012]
The adjustment means can also be configured to adjust the output angle of the audio beam in the
horizontal and vertical directions.
[0013]
In this case, the voice beam is also changed (tilted) in the vertical direction.
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3
For example, the audio beam can reach the listening position even when mounted on a device
that changes angle also vertically, such as the wall mount of a flat screen television.
[0014]
Moreover, the aspect which incorporates the angle detection means in any one of Claim 1 thru |
or 3 in a television is also possible.
In this case, the television transmits the value of the angle change to the speaker device, and the
speaker device adjusts the output angle of the sound beam according to the received angle
change.
[0015]
According to the present invention, a rotational angle sensor is provided, a change in angle (a
change in the installation direction) from the reference plane is detected, and the output angle of
the audio beam is adjusted. Even the audio beam can reach the listening position.
[0016]
Hereinafter, a speaker device according to an embodiment of the present invention will be
described.
FIG. 2A is a block diagram showing the configuration of the speaker device of the present
embodiment, and FIG. 2B is an external view of the speaker device.
[0017]
As shown in FIG. 2B, the speaker device 1 rotates in the horizontal direction by a predetermined
angle (for example, ± 45 degrees), and adjusts the output angle of the sound beam according to
the rotation angle.
[0018]
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4
As shown to the same figure (A), the speaker apparatus 1 is provided with user I / F11, the
control part 12, the memory 13, the rotation angle sensor 14, the signal processing part 15, and
the speaker array 16 (speaker units 161-168). ing.
The user I / F 11, the memory 13, the rotation angle sensor 14, and the signal processing unit 15
are connected to the control unit 12, and the speaker units 161 to 168 of the speaker array 16
are connected to the signal processing unit 15.
[0019]
The rotation angle sensor 14 is formed of a rotary encoder or the like, and detects the rotation
angle of the speaker device 1.
The rotation angle sensor 14 outputs a value corresponding to the detected rotation angle to the
control unit 12.
[0020]
The user I / F 11 includes an operation button, a remote controller, and the like provided on the
main body, and receives an operation of the user.
The user I / F 11 transmits an operation signal according to the user's operation to the control
unit 12.
The user inputs, for example, the room shape (the size of the room), the distance from the wall of
the speaker device, and the viewing position (the relative distance to the speaker device). If the
speaker device 1 is connected to a television, a screen for input may be displayed on the
television. In addition, it may be displayed on the OSD of the speaker device 1.
[0021]
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5
The control unit 12 controls the signal processing unit 15 based on the value input from the user
I / F 11 and the value input from the rotation angle sensor 14 to adjust the output angle of the
audio beam. The signal processing unit 15 distributes a predetermined delay to the input audio
signal according to the control of the control unit 12 and supplies the delayed audio signal to
each of the speaker units 161 to 168 of the speaker array 16. . The signal processing unit 15 can
output the audio beam in a plurality of directions by changing the delay amount, and can adjust
the output angle. In this embodiment, an audio beam of multi-channel surround sound is output.
[0022]
FIG. 3 is a diagram showing output angle adjustment of the audio beam. Let the state shown to
the figure (A) be a reference state (reference angle). When the user inputs an indoor shape and a
speaker installation position (a distance from a wall and a relative distance to a viewing position),
the control unit 12 records the current rotation angle in the memory 13 as a reference angle.
[0023]
The control unit 12 calculates the angle of wall reflection of the sound beam based on the room
shape and the speaker installation position, and determines the output angle of the sound beam
of all channels. Thereafter, the delay amount of the signal processing unit 15 is controlled based
on the determined angle, and the voice beam is output. In place of the user's numerical input, the
microphone may be used to measure the distance to the wall surface in the room and the
relationship with the listening position to determine the output angle. For example, a test sound
beam is swept into a room, the angle at which the level of sound collected by the microphone
shows a peak is recorded, and the output angle is adjusted to these angles. Also in this case, the
reference angle when there is an input (test instruction) from the user I / F 11 is recorded in the
memory 13.
[0024]
Thereafter, when the value from the rotation angle sensor 14 deviates from the reference angle,
the control unit 12 adjusts the output angle of each sound beam according to the change in angle
from the reference angle. As a result, as shown in FIG. 7B, each audio beam reaches the viewing
position.
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[0025]
FIG. 4 is a diagram showing an example of the angle adjustment method. Note that, in the figure,
only the sound beam of the front L (FL) channel is shown for ease of explanation. In the figure,
the angle change from the reference angle is θ, and the output angle of the sound beam of the
FL channel at the reference angle is α.
[0026]
The control unit 12 calculates an angle change θ from the reference angle according to the
value of the angle input from the rotation angle sensor 14 and calculates an output angle
according to the angle change θ. That is, “output angle α at the reference angle − angle
change θ” is set as the output angle. By setting this for the audio beams of all channels, the
audio beam can reach the viewing position.
[0027]
As shown in FIG. 5, when recording the reference angle for the first time, the control unit 12
calculates in advance the delay amount for all angle changes, and stores it in the memory 13 as a
table. FIG. 5 shows the relationship between the angle change and the delay amount set for each
speaker unit. Note that the numerical values shown in the figure are merely examples for the
purpose of explanation, and are not the delay amount set by the actual device.
[0028]
As shown in the figure, the control unit 12 calculates the output angle of the sound beam at the
reference angle, and calculates the delay amount to be set for all the speaker units. Also, the
calculation of the delay amount with respect to all angle changes (in the example shown in the
figure, the resolution is 5 degrees) is performed. A table showing the relationship between the
angle change and the delay amount is calculated for the audio beams of all the channels and
stored in the memory 13 (FIG. 5 shows only the front L channel). When the speaker device
actually rotates, the table is read from the memory 13 to set the delay amount.
09-05-2019
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[0029]
Next, FIG. 6 is a diagram showing another example of output angle adjustment of the sound
beam. The difference from the example shown in FIG. 3 is that the viewing position changes, and
the relative position (relative distance) between the speaker device and the viewing position does
not change. Also in this example, the control unit 12 records the rotation angle shown in FIG. 6A
as the reference angle in the memory 13 as described above.
[0030]
Also in this example, when the value from the rotation angle sensor 14 deviates from the
reference angle, the control unit 12 adjusts the output angle of each sound beam according to
the change in angle from the reference angle. Here, the control unit 12 adjusts the output angle
by a method different from that of FIG. 4 so as to obtain the audio beam path as shown in FIG. 6
(B).
[0031]
FIG. 7 is a diagram showing another example of the angle adjustment method. In the same figure,
only the sound beam of the FL channel is shown to facilitate the explanation. In the figure, the
angle change from the reference angle is θ, the output angle of the sound beam of the FL
channel at the reference angle is α, and the difference between the reference angle and the
output angle is β.
[0032]
In this case, the control unit 12 considers that the relative distance L to the speaker device has
not changed, and calculates the output angle. That is, the difference β between the reference
angle and the output angle is represented by “β = tan−1 {(2a−L sin θ) / L cos θ}”. Here,
the control unit 12 calculates the output angle γ (γ = β−θ) with respect to the new reference
angle (the front of the speaker device after the angle change) according to the value of the
calculated angle difference β. Let γ be a new output angle. By setting this for the audio beams
09-05-2019
8
of all channels, the audio beam can reach the viewing position. However, since the relative
position between the speaker device and the viewing position has not changed, the sound beam
of the center (C) channel is not changed, and the output angles of the other sound beams are
adjusted.
[0033]
The control unit 12 switches the adjustment modes of FIGS. 3 and 6 in accordance with the value
of the angle change. For example, if the angle change is within ± 5 degrees, the output angle
shown in FIGS. 3 and 4 is adjusted, and if the angle change is larger than ± 5 degrees, the output
angle shown in FIGS. 6 and 7 is adjusted. . When the change in angle is small, it is determined
that the viewing position is not changed only by the user touching the speaker array or the like
and the installation direction of the speaker device being changed (for example, the user returns
the speaker device to the original angle) It is assumed that the intention to return was not back).
Therefore, the output angles of the sound beams of all the channels including the center channel
are adjusted so that the sound beams reach the viewing position. On the other hand, when the
change in angle is large, the user changes the viewing position, and determines that the speaker
device is rotated toward the front of the user (the relative position has not changed). Therefore,
the output angle of the sound beam other than the center channel is adjusted. Also, these
adjustment modes may be switched according to an instruction from the user.
[0034]
Next, FIG. 8 is a diagram showing a modification of the output angle adjustment of the sound
beam. The difference from the example shown in FIG. 6 is that the viewing position moves in
parallel in the left direction in the drawing (to the indoor left wall side), and the relative position
(relative distance) between the speaker device and the viewing position changes. Also in this
example, the control unit 12 records the rotation angle shown in FIG. 8A as a reference angle in
the memory 13 as described above.
[0035]
Also in this example, when the value from the rotation angle sensor 14 deviates from the
reference angle, the control unit 12 adjusts the output angle of each sound beam according to
the change in angle from the reference angle. Here, the control unit 12 adjusts the output angle
09-05-2019
9
by a method different from that of FIG. 7 so as to obtain the audio beam path as shown in FIG. 8
(B).
[0036]
FIG. 9 is a view showing a modified example of the angle adjustment method. In the same figure,
only the sound beam of the FL channel is shown to facilitate the explanation. Also in this figure,
the angle change from the reference angle is θ, the output angle of the sound beam of the FL
channel at the reference angle is α, and the difference between the reference angle and the
output angle is β.
[0037]
In this case, the control unit 12 calculates the angle change θ from the reference angle
according to the value of the angle input from the rotation angle sensor 14 and calculates the
output angle according to the indoor shape and the speaker installation position. That is,
assuming that the indoor width (the distance between the speaker installation position and the
indoor horizontal wall surface) is a, and the relative distance between the viewing position and
the L is L, the difference β between the reference angle and the output angle is “β = tan−1 {((
2a−L sin θ) / L} ”. Here, the control unit 12 calculates the output angle γ (γ = β−θ) with
respect to the new reference angle (the front of the changed speaker device) according to the
calculated value of β, and newly adds this γ Output angle. By setting this for the audio beams of
all channels, the audio beam can reach the viewing position. Note that for the C channel, the
sound beam may be output as it is without changing the output angle, but since the relative
distance has changed, the focus position is changed to a position away from the speaker device,
and the volume is raised. Processing such as may be performed.
[0038]
The control unit 12 switches the adjustment modes of FIGS. 6 and 8 according to an instruction
from the user. Also, instead of switching the adjustment mode, the intermediate value of each of
the values of γ obtained in FIGS. 7 and 9 may be calculated as the final output angle.
Alternatively, it is also possible to widen the beam width so that the sound beam reaches both
positions. When the beam width is increased, the volume is increased by the amount of decrease
in power.
09-05-2019
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[0039]
The calculation of the table shown in FIG. 5 is similarly performed in the examples described in
FIG. 6 and FIG. When the speaker device actually rotates, the table is read from the memory 13
to set the delay amount.
[0040]
Next, FIG. 10 is a flowchart showing the operation of the control unit 12. When the user inputs
an indoor shape or a speaker installation position or instructs measurement by a test sound
beam, the operation of FIG.
[0041]
First, the control unit 12 records the value of the rotation angle at that time as a reference angle
in the memory 13 (s11). Then, it waits until there is a change in angle (s12), and if there is a
change in angle, it is determined whether the change in angle is within the fine adjustment range
(within ± 5 degrees) (s13). If the angle change is within the fine adjustment range (within ± 5
degrees), the output angles shown in FIGS. 3 and 4 are adjusted to adjust the output angles of the
audio beams of all channels (s14). If it is out of the fine adjustment range (if it is larger than ± 5
degrees), the output angle adjustment shown in FIG. 6 and FIG. 7 (or FIG. 8 and FIG. 9) is
performed to adjust the output angle of the sound beam other than the center channel. Do.
[0042]
In the above example, the adjustment of the output angle in the horizontal direction has been
described. However, when attached to a device that changes the angle also in the vertical
direction, such as a wall mount of a flat-screen TV, as shown in FIG. It is also possible to
configure to adjust in the direction as well. In this case, a sensor for detecting an angle in the
vertical direction (φ in the figure) is incorporated in the speaker device.
09-05-2019
11
[0043]
Moreover, the following modifications are also possible for this embodiment. FIG. 12A is a block
diagram showing the configuration of a speaker system according to a modification, and FIG. 12B
is an external view of the speaker system. The same reference numerals as in FIG. 2 denote the
same parts as in FIG. 2, and a description thereof will be omitted.
[0044]
The speaker system includes a speaker device 3 and a television 2 connected to the speaker
device 3. The speaker device 3 and the television 2 are integrated, and when the television 2
rotates, the speaker device 3 also rotates.
[0045]
The television 2 according to this example includes a rotation angle sensor 21 and an output I / F
22 that outputs a value of the rotation angle. The speaker device 3 also includes an input I / F 17
for inputting a value of the rotation angle. The output I / F 22 and the input I / F 17 may be
interfaces of any standard, but use, for example, a CEC vendor command of HDMI (registered
trademark).
[0046]
This speaker system substitutes the rotation angle sensor 21 of the television 2 for the rotation
angle sensor 14 of the speaker device 1 shown in FIG. The operation performed by the control
unit 12 is the same as that of the flowchart described above with reference to FIG. Thus, the
television 2 may be provided with a rotation angle sensor, and the speaker device 3 may be
configured to adjust the output angle of the sound beam using the detected angle.
[0047]
It is a figure showing the path of a voice beam. It is a block diagram and an external view which
09-05-2019
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show the structure of a speaker apparatus. It is the figure which showed the output angle
adjustment of the audio | voice beam. It is the figure which showed the example of the angle
adjustment method. The relationship between the change in angle and the delay amount set for
each speaker unit is shown. It is a figure showing other examples of output angle adjustment of a
voice beam. It is the figure which showed the other example of the angle adjustment method. It is
the figure which showed the modification of output angle adjustment of an audio | voice beam. It
is a figure showing the modification of the angle adjustment method. 5 is a flowchart showing an
operation of a control unit 12; It is a figure showing angle adjustment of the perpendicular
direction. It is a block diagram and an external view showing composition of a speaker system
concerning a modification.
Explanation of sign
[0048]
1-PC 2-display 3-speaker device
09-05-2019
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