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JP2006304165

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2006304165
PROBLEM TO BE SOLVED: To provide a low cost, low weight speaker array system that is easy to
install. According to the present invention, a plurality of speakers attached to a single speaker
cabinet, a plurality of amplifiers for driving each of the plurality of speakers, and a plurality of
corresponding to each of the plurality of speakers from input musical tone signals Signal
processing means for generating an output musical tone signal, wireless transmission means for
wirelessly transmitting a plurality of output musical tone signals generated by the signal
processing means, and wirelessly transmitted corresponding to each of the plurality of amplifiers
And a plurality of wireless receiving means for respectively receiving corresponding ones of the
plurality of output musical tone signals and outputting the same to the corresponding amplifier,
wherein the plurality of amplifiers, the signal processing means, the wireless transmission means,
and the plurality The speaker array system according to the present invention is characterized in
that the wireless receiving means is provided in the speaker cabinet. [Selected figure] Figure 1
スピーカアレイシステム
[0001]
The present invention relates to a speaker array system using wireless communication.
[0002]
A speaker system in which a large number of speaker units are arranged is called a "speaker
array".
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1
In the speaker array, the directivity of the speaker can be sharpened and the direction of the
acoustic beam can be controlled by controlling the delay and gain given to the musical tone
signals supplied to the individual speakers. When the directivity is intensified, the same energy is
emitted in a narrower range, so that the distance attenuation of the sound pressure becomes
smaller, and the sound can be heard clearly far. Also, acoustic radiation in unnecessary directions
can be suppressed. In addition, since the direction of the acoustic beam can be controlled, the
speaker does not have to be directed to the listening position of the sound, so that there is an
advantage that the restriction on the installation method of the speaker is reduced. A speaker
array of this type is disclosed, for example, in Patent Document 1. Unexamined-Japanese-Patent
No. 9-233591
[0003]
Usually, in order to supply a tone signal to each speaker, a signal line must be laid from the
amplifier to the speaker. At this time, when the signal line from the amplifier to the speaker
becomes long, there is a problem that the sound quality is deteriorated due to the attenuation of
the signal or the mixing of the noise. In addition, in order to install a speaker array system having
a large number of speakers, it is necessary to connect a large number of cables, which causes a
problem that the amount of work is increased. Furthermore, since a large number of cables are
used, there is also a problem that the probability of occurrence of wiring errors increases.
Furthermore, the wiring using a large number of cables causes an increase in cost and an
increase in weight of the system, which has been a cause of inhibiting the spread of the speaker
array system. Furthermore, since the cable also causes so-called "bibber" generation, there is a
problem that the quality of the tone reproduced from the speaker array system is deteriorated by
using a large number of cables.
[0004]
The present invention has been made in view of the above-described circumstances, and an
object thereof is to provide a low-cost, low-weight speaker array system which is easy to install.
Another object of the present invention is to provide a speaker array system in which the
distance between the amplifier and the speaker is minimized and the deterioration of the sound
quality is suppressed.
[0005]
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2
In order to solve the above-described problems, the present invention provides a plurality of
speakers attached to one speaker cabinet, a plurality of amplifiers for driving each of the
plurality of speakers, and an audio from the plurality of speakers for an input musical tone
signal. A speaker array system comprising: signal processing means for performing signal
processing for forming a beam; and wireless transmitting means and wireless receiving means
installed on a signal path before or after the signal processing means for transmitting and
receiving signals wirelessly provide. According to this speaker array system, since the amplifier
and the speaker correspond to one to one, the distance between the amplifier and the speaker
can be minimized. Thereby, the improvement of the sound quality can be realized. Further,
according to this speaker array system, the use of the wireless transmission means and the
wireless reception means makes it unnecessary to lay out the signal lines, so that the wiring at
the time of installation can be simplified.
[0006]
In a preferred embodiment, the signal processing means generates a plurality of output musical
tone signals corresponding to each of the plurality of speakers from the input musical tone
signal, and the wireless transmission means generates a plurality of the plurality of musical tone
signals generated by the signal processing means. An output musical tone signal is wirelessly
transmitted, and the wireless receiving means is a plurality of wireless receiving means provided
corresponding to each of the plurality of amplifiers, and the corresponding one of the plurality of
wirelessly transmitted output musical tone signals The plurality of amplifiers, the signal
processing means, the wireless transmission means, and the plurality of wireless reception means
may be provided in the speaker cabinet, each receiving and outputting to the corresponding
amplifier. According to the speaker array system of this aspect, since the signal processing means
is disposed at the front stage of the wireless transmission means, the configuration on the
receiving side can be simplified.
[0007]
In another preferred embodiment, the wireless transmission means wirelessly transmits an input
musical tone signal, and the wireless reception means is a plurality of wireless reception means
provided corresponding to each of the plurality of amplifiers, wirelessly transmitted. Said signal
processing means is provided corresponding to each of said plurality of wireless receiving means,
and each of said plurality of speakers is provided with the input musical tone signal received by
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3
said wireless receiving means. The plurality of corresponding output tone signals are generated
and output to the corresponding amplifier, and the plurality of amplifiers, the plurality of signal
processing means, the wireless transmission means, and the plurality of wireless reception means
are provided in the speaker cabinet. It may be done. According to the speaker array system of
this aspect, since the wireless transmission means may transmit the same signal to all the
wireless reception means, the configuration of the wireless transmission means can be simplified.
[0008]
In yet another preferred embodiment, the wireless transmission means wirelessly transmits an
input musical tone signal, the wireless reception means receives the wirelessly transmitted input
musical tone signal, and the signal processing means uses the wireless reception means. A
plurality of output musical tone signals corresponding to each of the plurality of speakers are
generated from the received input musical tone signal and output to the corresponding amplifier,
and the plurality of amplifiers, the signal processing means, the wireless transmission means, and
Wireless receiving means may be provided in the speaker cabinet. According to the speaker array
system of this aspect, since only one wireless receiving means is required for all the speakers, the
configuration of the speaker array system can be simplified.
[0009]
In yet another preferred embodiment, the wireless transmission means wirelessly transmits an
input musical tone signal, the wireless reception means receives the wirelessly transmitted input
musical tone signal, and the signal processing means comprises the plurality of amplifiers. A
plurality of signal processing means provided corresponding to each, generating a plurality of
output tone signals corresponding to each of the plurality of speakers from the input tone signals
received by the wireless receiving means, and corresponding amplifiers And the plurality of
amplifiers, the plurality of signal processing means, the wireless transmission means, and the
wireless reception means may be provided in the speaker cabinet. According to the speaker array
system of this aspect, since only one wireless receiving means is required for all the speakers, the
configuration of the speaker array system can be simplified.
[0010]
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4
In still another preferred embodiment, the above speaker array system may be formed of a
material that shields the speaker cabinet from electromagnetic waves. Alternatively, the plurality
of speakers may be formed of a material that shields an electromagnetic wave. By using a
material that shields an electromagnetic wave in the speaker cabinet or the speaker itself, it is
possible to shield the electromagnetic wave from the outside, and it is possible to prevent the
electromagnetic wave of the speaker array system from leaking to the outside.
[0011]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. <1. First Embodiment> FIG. 1 is a block diagram showing a configuration of a
speaker array system 1 according to a first embodiment of the present invention. The speaker
array system 1 is a speaker array system having n speakers 70. In the following description,
when it is necessary to distinguish each of the speakers 70 from the other speaker units,
subscripts such as “speakers 70-1 and 70-2” are added for distinction. When it is not
necessary to distinguish from other speaker units, it is simply described as "speaker 70". The
same applies to other components other than the speaker 70.
[0012]
In the speaker array system 1, musical tone signals and control signals from the outside are input
to the input / output unit 20. In the following description, the "tone signal" is a signal
representing a sound including a wide range of voices, music and the like. The "control signal" is
a signal including information indicating a position at which the acoustic beam formed by the
speaker array is converged. The input / output unit 20 is configured by an A / D converter, a
buffer memory, and the like (all are not shown). The input / output unit 20 outputs the input
musical tone signal and control signal to the signal processing unit 30. The signal processing unit
30 is configured by a DSP (Digital Signal Processor) or the like (not shown). The signal
processing unit 30 performs necessary processing on the musical tone signal so that the acoustic
beam converges to the position indicated by the control signal. The signal processing unit 30
outputs the processed tone signal to the communication unit 40. The communication unit 40
wirelessly transmits the musical tone signal to the communication unit 50. In the present
embodiment, the input / output unit 20, the signal processing unit 30, and the communication
unit 40 constitute a wireless LAN station 200.
[0013]
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Each speaker 70 is connected to an amplifier 60 for supplying a tone signal. The amplifier 60 is
configured by a D / A converter, an amplifier (all not shown), and the like. The speaker 70 and
the amplifier 60 correspond one to one. Further, each amplifier 60 is connected with a
communication unit 50 for receiving a musical tone signal by wireless communication. The
communication unit 50 and the amplifier 60 correspond one to one. That is, a dedicated
amplifier 60 and a communication unit 50 are connected to a certain speaker 70. In the present
embodiment, the speaker 70, the amplifier 60, and the communication unit 50 constitute a
speaker unit 100. The speaker 70 outputs a musical tone in accordance with the musical tone
signal received by the communication unit 50. The power supply 10 is a power supply that
supplies power to the input / output unit 20, the signal processing unit 30, the communication
unit 40, the communication unit 50, and the amplifier 60. In FIG. 1, thin lines indicate the power
line PL.
[0014]
FIG. 2 is a view showing an installation example of the speaker array system 1. The speaker 70,
the amplifier 60, and the communication unit 50 are attached to a single case to constitute a
speaker unit 100. That is, the speaker array system 1 has n speaker units 100. Further, the input
/ output unit 20, the signal processing unit 30, and the communication unit 40 are formed in a
single case, and constitute a wireless LAN station 200.
[0015]
In the installation example shown in FIG. 2, the n speaker units 100 are fitted in the holes H of
the wall surface of the room R. The wireless LAN station 200 is installed on the floor of the room
R. The wireless LAN station 200 is connected via a signal line to a device (not shown) that
outputs musical tone signals and control signals. Further, the wireless LAN station 200 is
connected to the power supply 10 via the power line PL, and operates by receiving the supply of
power from the power supply 10. Although details will be described later, the wall of the room R
is configured to be able to supply power from the power supply 10 to the speaker unit 100, and
the wall and the power supply 10 are connected by a power line PL.
[0016]
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6
FIG. 3 (a) shows the appearance of the speaker unit 100, and FIG. 3 (b) shows a cross section of
the speaker unit 100 and the wall of the room R. As shown in FIG. The speaker unit 100 has a
structure in which the speaker 70, the amplifier 60, and the communication unit 50 are housed
inside a cylindrical exterior member 110. The exterior member 110 is formed with a thread for
fitting the speaker unit 100 to a wall. Further, the exterior member 110 functions as a contact
with the power line PL, and therefore, is formed of a conductive material such as metal. Further,
on the inner surface of the exterior member 110, a terminal 120 for obtaining a contact of the
other polarity from the power supply is formed. The terminal 120 is also formed of a conductive
material. An insulating layer 130 is provided between the terminal 120 and the exterior member
110, and the exterior member 110 and the terminal 120 are insulated.
[0017]
On the inner surface of the hole H, an electrode 310 and an electrode 320 for supplying power
to the speaker unit 100 are formed. The electrode 310 is formed along the inner surface of the
hole H and has a cylindrical shape. The arrow in FIG. 3 (b) means the inside of the room R (the
side where the listener is located, the outside when viewed from the speaker array system 1 and
the wall). Inside the wall, an electrode 310, an electrode 320, and an insulating plate 330 for
insulating the electrode 310 and the electrode 320 are formed. On the inner surface of the
electrode 310, a thread for fitting the speaker unit 100 is formed. The speaker unit 100 is fixed
to the wall of the room R by fitting the speaker unit 100 into the hole H. With the speaker unit
100 fitted in the hole H in this manner, the terminal 120 contacts the electrode 320. The
electrode 310 and the electrode 320 are connected to the power line PL at a part of the wall, and
can supply power from the power supply 10 to the speaker unit 100. Thus, power is supplied to
the speaker unit 100 from the wall of the room R. Thus, the electrode 310 has a function of
fixing the speaker unit 100 to a wall and a function of providing a contact between the speaker
unit 100 and the power line. A member having a function of fixing the speaker unit 100 to a wall
and a member having a function of providing a contact point between the speaker unit 100 and
the power line may be separately provided.
[0018]
In addition, the method of fitting the speaker unit 100 to the hole H is not restricted to the thing
by a screw thread. The point is that any configuration may be used as long as the speaker unit
100 can be fixed to the wall. For example, the speaker unit 100 may be screwed or fitted into a
wall. Further, the shapes of the electrode 310 and the electrode 320 are not limited to those
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7
described above. The electrodes 310 and 320 may have any shape as long as they can supply
power to the speaker unit 100.
[0019]
Subsequently, the operation of the speaker array system 1 will be described in more detail with
reference to FIGS. 1 and 2. When the musical tone signal and the control signal are input to the
input / output unit 20 of the wireless LAN station 200, the musical tone signal and the control
signal are converted into a digital signal by the A / D converter. The digitally converted musical
tone signal and control signal are output to the signal processing unit 30. When receiving the
musical tone signal and the control signal, the signal processing unit 30 performs processing (for
example, gain adjustment, delay processing, equalizing processing, etc.) necessary for forming an
acoustic beam specified by the control signal. The signal processing unit 30 stores in advance a
table or a function in which the position indicated by the control signal, the identifier for
specifying the speaker unit 100, and the processing amount of signal processing (for example,
delay amount for delay processing) are associated. doing. The signal processing unit 30
calculates the amount of processing with reference to this table or function. The signal
processing unit 30 performs delay processing corresponding to the calculated delay amount on
the tone signal. The same applies to other processing such as gain adjustment and equalizing
processing. Hereinafter, the musical tone signal subjected to signal processing in the signal
processing unit 30 will be referred to as an "output musical tone signal". The signal processing
unit 30 generates output tone signals corresponding to each of the n speaker units 100. The
signal processing unit 30 adds a unit identifier for specifying the speaker unit 100 as a
transmission destination to the generated output musical tone signal, and outputs the result to
the communication unit 40. In the present embodiment, different signals are transmitted to n
speaker units 100, respectively.
[0020]
The communication unit 40 wirelessly transmits the input output tone signal to the speaker unit
100 specified by the unit identifier. In the present embodiment, the communication unit 40 and
the communication unit 50 perform wireless communication using a so-called wireless LAN
technology. The communication unit 40 and the communication unit 50 have an antenna, a
processor, a memory, and the like necessary for constructing a wireless LAN (all are not shown).
Each of the communication units 50 stores an IP address identifying itself (the speaker unit 100)
in the memory. For example, IEEE 802.11x can be used as the wireless LAN standard. For
example, an IP address can be used as the unit identifier. The communication unit 40 can
04-05-2019
8
transmit a wireless signal to a specific communication unit 50 by specifying a unit identifier.
[0021]
When receiving the output musical tone signal from the communication unit 40, the
communication unit 50 of the speaker unit 100 outputs the received output musical tone signal
to the amplifier 60. The amplifier 60 performs digital / analog conversion on the output musical
tone signal in the D / A converter. The output tone signal converted to analog is amplified by the
amplifier and output to the speaker 70. The speaker 70 outputs a musical tone in accordance
with the input musical tone signal.
[0022]
As described above, the wireless LAN station 200 wirelessly transmits different output musical
tone signals to the n speaker units 100. That is, when the musical tone signal is an m channel
signal, the wireless LAN station 200 wirelessly transmits m × n musical tone signals. The
speaker unit 100 receives the corresponding output musical tone signals, and outputs musical
tones having different parameters such as delay amount. Thus, a selective acoustic beam is
formed at the position specified by the control signal.
[0023]
According to the speaker array system 1 according to the present embodiment, since the
amplifier 60 and the speaker 70 correspond to each other, the distance between the amplifier 60
and the speaker 70 can be minimized by integrating the amplifier 60 and the speaker 70. Can be
Thereby, the improvement of the sound quality can be realized. Further, according to the speaker
array system 1, since the laying of the signal line becomes unnecessary between the wireless
LAN station 200 and the speaker unit 100, the wiring at the time of installation can be simplified.
[0024]
<2. Second Embodiment> FIG. 4 is a block diagram showing a configuration of a speaker
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9
array system 2 according to a second embodiment of the present invention. In FIG. 4, the same
reference numerals as in the speaker array system 1 according to the first embodiment denote
the same constituent elements. Further, in the following, descriptions of matters common to the
first embodiment will be omitted, and differences from the first embodiment will be mainly
described.
[0025]
The point that the speaker array system 2 is different from the speaker array system 1 according
to the first embodiment is that the signal processing unit 30 is located at the subsequent stage of
the communication unit 50. That is, while the signal processing unit 30 is present in the wireless
LAN station 200 in the speaker array system 1, the signal processing unit 30 is present in the
speaker unit 100 in the speaker array system 2. As shown in FIG. 4, in the present embodiment,
the speaker unit 100 includes a communication unit 50, a signal processing unit 30, an amplifier
60, and a speaker 70.
[0026]
In the speaker array system 2, when a musical tone signal and a control signal are input to the
input / output unit 20 of the wireless LAN station 200, the musical tone signal and the control
signal are converted into a digital signal by an A / D converter. The digitally converted musical
tone signal and control signal are output to the communication unit 40. When receiving the
musical tone signal and the control signal, the communication unit 40 wirelessly transmits the
musical tone signal and the control signal to the n speaker units 100. In the present embodiment,
the communication unit 40 (wireless LAN station 200) transmits the same musical tone signal
(and control signal) to the n speaker units 100.
[0027]
The communication unit 50 of the speaker unit 100 identifies itself, that is, stores in advance a
unit identifier identifying the speaker unit 100. When the musical tone signal and the control
signal are received, the communication unit 50 adds a unit identifier to the received musical tone
signal and control signal, and outputs the unit identifier to the signal processing unit 30.
04-05-2019
10
[0028]
When receiving the musical tone signal and the control signal, the signal processing unit 30
performs processing necessary for forming an acoustic beam on the musical tone signal in
accordance with the control signal. The signal processing unit 30 stores in advance a table or
function for outputting a processing amount (in the case of delay processing, a delay amount)
from the unit identifier and the position indicated by the control signal. The signal processing
unit 30 calculates the amount of processing with reference to this table or function. The signal
processing unit 30 performs processing specified by the calculated processing amount on the
tone signal. In the present embodiment, the signal processing unit 30 generates an output
musical tone signal for outputting a musical tone from the corresponding speaker 70. That is, the
signal processing units 30-1, 30-2, ..., 30-n generate different output musical tone signals. The
signal processing unit 30 outputs the generated output tone signal to the amplifier 60.
[0029]
The amplifier 60 performs digital / analog conversion on the output musical tone signal in the D
/ A converter. The output tone signal converted to analog is amplified by the amplifier and
output to the speaker 70. The speaker 70 outputs a musical tone in accordance with the input
musical tone signal. Thus, a selective acoustic beam is formed at the position specified by the
control signal.
[0030]
According to the speaker array system 2 according to this embodiment, since the amplifier 60
and the speaker 70 correspond to each other, the distance between the amplifier 60 and the
speaker 70 can be minimized by integrating the amplifier 60 and the speaker 70. Can be
Thereby, the improvement of the sound quality can be realized. Further, according to the speaker
array system 2, since the laying of the signal line becomes unnecessary between the wireless
LAN station 200 and the speaker unit 100, the wiring at the time of installation can be simplified.
Furthermore, according to the speaker array system 2, the wireless LAN station 200 may
transmit the same signal to all the speaker units 100, so the configuration of the wireless
transmission means can be simplified.
[0031]
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11
<3. Third Embodiment> FIG. 5 is a block diagram showing a configuration of a speaker array
system 3 according to a third embodiment of the present invention. In FIG. 5, the same reference
numerals are attached to the components common to the speaker array systems 1 and 2
according to the first and second embodiments. Further, in the following, descriptions of matters
in common with the first and second embodiments will be omitted, and differences from the first
and second embodiments will be mainly described.
[0032]
The difference between the speaker array system 3 and the speaker array system 2 according to
the second embodiment is that each of the speaker units 100 does not have the communication
unit 50 and the signal processing unit 30, and the communication common to all the speaker
units 100 The point is that the unit 50 and the signal processing unit 30 are used. That is,
although the speaker unit 100 in the speaker array system 2 includes the speaker 70, the
amplifier 60, the signal processing unit 30, and the communication unit 50, the speaker unit 100
in the speaker array system 3 includes the speaker 70 as shown in FIG. And an amplifier 60. As
the communication unit 50 and the signal processing unit 30, one common to n speaker units
100 is used. The communication unit 50 and the signal processing unit 30 constitute a wireless
LAN station 400. The wireless LAN station 400 and the n speaker units 100 are connected via
the network 300. The network 300 is, for example, a wired LAN or a wireless LAN.
[0033]
When the musical tone signal and the control signal are input to the input / output unit 20 of the
wireless LAN station 200, the musical tone signal and the control signal are converted into a
digital signal by the A / D converter. The digitally converted musical tone signal and control
signal are output to the communication unit 40. When the tone signal and the control signal are
received, the communication unit 40 wirelessly transmits the tone signal and the control signal
to the wireless LAN station 400.
[0034]
When receiving the musical tone signal and the control signal, the communication unit 50 of the
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12
wireless LAN station 400 outputs the received musical tone signal and the control signal to the
signal processing unit 30. As in the first embodiment, the signal processing unit 30 performs
processing necessary for forming an acoustic beam on tone signals, and generates different tone
data for n speaker units 100. The signal processing unit 30 transmits musical tone data
corresponding to each of the n speaker units 100 to each of the speaker units 100 via the
network 300.
[0035]
When receiving the musical tone signal and the control signal, the amplifier 60 of the speaker
unit 100 converts the output musical tone signal from digital to analog in the D / A converter.
The output tone signal converted to analog is amplified by the amplifier and output to the
speaker 70. The speaker 70 outputs a musical tone in accordance with the input musical tone
signal. Thus, a selective acoustic beam is formed at the position specified by the control signal.
[0036]
According to the speaker array system 3 according to the present embodiment, since the
amplifier 60 and the speaker 70 correspond to each other, the distance between the amplifier 60
and the speaker 70 is minimized by integrating the amplifier 60 and the speaker 70. Can be
Thereby, the improvement of the sound quality can be realized. Further, according to the speaker
array system 3, the use of the wireless LAN station 200 and the speaker unit 100 makes it
unnecessary to lay out the signal lines, and therefore the wiring at the time of installation can be
simplified. Furthermore, according to the speaker array system 3, since only one communication
unit 50 is required for all the speakers, the configuration of the speaker array system can be
simplified.
[0037]
<4. Fourth Embodiment> FIG. 6 is a block diagram showing a configuration of a speaker array
system 4 according to a fourth embodiment of the present invention. In FIG. 6, the same
referential mark is attached | subjected to the same component as the speaker array systems 1-3
which concern on 1st-3rd embodiment. Moreover, below, the description is abbreviate | omitted
about the matter in common with 1st-3rd embodiment, and it demonstrates focusing on
difference with 1st-3rd embodiment.
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[0038]
The speaker array system 4 is different from the speaker array system 3 according to the third
embodiment in that each of the speaker units 100 includes a signal processing unit 30. That is,
as shown in FIG. 6, in the speaker array system 4, the speaker unit 100 has a speaker 70, an
amplifier 60, and a signal processing unit 30. One communication unit 50 common to the n
speaker units 100 is used. The communication unit 50 and the n speaker units 100 are
connected via the network 300. The network 300 is, for example, a wired LAN or a wireless LAN.
[0039]
When the musical tone signal and the control signal are input to the input / output unit 20 of the
wireless LAN station 200, the musical tone signal and the control signal are converted into a
digital signal by the A / D converter. The digitally converted musical tone signal and control
signal are output to the communication unit 40. When the musical tone signal and the control
signal are received, the communication unit 40 wirelessly transmits the musical tone signal and
the control signal to the communication unit 50.
[0040]
When receiving the musical tone signal and the control signal, the communication unit 50
transmits the received musical tone signal and the control signal to each of the speaker units 100
via the network 300. When the tone signal and the control signal are received via the network
300, the signal processing unit 30 of the speaker unit 100 performs processing necessary for
forming an acoustic beam on the tone signal according to the second embodiment, and the
corresponding speaker unit 100. To generate an output musical tone signal for outputting a
musical tone. The signal processing unit 30 outputs the generated tone data to the amplifier 60.
[0041]
When the tone signal and the control signal are received, the amplifier 60 converts the output
04-05-2019
14
tone signal from digital to analog in the D / A converter. The output tone signal converted to
analog is amplified by the amplifier and output to the speaker 70. The speaker 70 outputs a
musical tone in accordance with the input musical tone signal. Thus, a selective acoustic beam is
formed at the position specified by the control signal.
[0042]
According to the speaker array system 4 according to the present embodiment, since the
amplifier 60 and the speaker 70 correspond to each other, the distance between the amplifier 60
and the speaker 70 is minimized by integrating the amplifier 60 and the speaker 70. Can be
Further, according to the speaker array system 4, the use of the wireless LAN station 200 and the
speaker unit 100 makes it unnecessary to lay out the signal lines, and therefore the wiring at the
time of installation can be simplified. Furthermore, according to the speaker array system 4, only
one communication unit 50 is required for all the speakers 70, so that the configuration of the
speaker array system 4 can be simplified.
[0043]
<5. Other Embodiments> The present invention is not limited to the above-described
embodiments, and various modifications can be made. In each of the above-described
embodiments, an example in which the present invention is applied to a speaker array system
has been described, but the present invention can also be applied to a microphone array system.
When the present invention is applied to a microphone array system, the signal flow is the
reverse of that described for the speaker array system.
[0044]
Moreover, although the thing using wireless LAN technology was demonstrated as a
communication technology between the communication part 40 and the communication part 50
in each above-mentioned embodiment, you may use wireless communication technologies other
than wireless LAN. For example, the electromagnetic waves used for wireless communication are
not limited to electromagnetic waves having frequencies such as 2.4 GHz and 5.2 GHz, and
electromagnetic waves having various frequencies, such as infrared light and visible light, can be
used. When infrared light or visible light is used, the communication unit 40 has a light emitting
device such as a laser diode, and the communication unit 50 has a light receiving device such as
04-05-2019
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a photodiode. In this case, wireless communication can be performed by arranging the
communication unit 40 and the communication unit 50 to face each other. Also, as a method of
transmitting multi-channel signals, various methods such as time division, frequency division,
code division, space division can be used.
[0045]
Moreover, although the aspect which installs the speaker unit 100 in the wall of the room R was
demonstrated in the above-mentioned each embodiment, the installation method of the speaker
unit 100 is not limited to this. It may be configured to be attached to a so-called speaker box
cabinet (enclosure) instead of a wall of a building. In addition, in the aspect which installs a
speaker unit in the wall of a room like each above-mentioned embodiment, it can be grasped |
ascertained that the whole room is a speaker cabinet. In the cabinet, it is preferable to use a
material having an electromagnetic shielding effect such as metal. By using a material for
shielding the electromagnetic wave in the cabinet, it is possible to shield the electromagnetic
wave from the outside, and it is possible to prevent the electromagnetic wave of the speaker
array system from leaking to the outside. Or you may use the material which shields
electromagnetic waves not to a cabinet but to speaker unit 100 itself (housing of speaker 70).
[0046]
FIG. 1 is a block diagram showing a configuration of a speaker array system 1 according to a first
embodiment of the present invention. FIG. 2 is a diagram showing an installation example of the
speaker array system 1; It is a figure which shows the (a) external appearance and the (b) cross
section of the speaker unit 100. FIG. It is a block diagram which shows the structure of the
speaker array system 2 which concerns on 2nd Embodiment. It is a block diagram which shows
the structure of the speaker array system 3 which concerns on 3rd Embodiment. It is a block
diagram which shows the structure of the speaker array system 4 which concerns on 4th
Embodiment.
Explanation of sign
[0047]
1 · 2 · 3 · 4 ... speaker array system, 10 ... power supply, 20 ... input / output unit, 30 ... signal
processing unit, 40 ... communication unit, 50 ... communication unit, 60 ... amplifier, 70 ...
04-05-2019
16
speaker, 100 ... speaker unit 110: Exterior member, 120: Terminal, 130: Insulating layer, 200:
Wireless LAN station, 300: Network, 310: Electrode, 320: Electrode, 330: Insulating plate, 400:
Wireless LAN station
04-05-2019
17
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