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DESCRIPTION JP2006094390

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DESCRIPTION JP2006094390
The present invention provides an acoustic system capable of detecting a connected speaker unit
and forming a desired sound field and sound pressure freely and flexibly according to the
situation. A sound system includes a controller unit 100 and a plurality of speaker units 10 and
20. The controller unit 100 is provided with a main controller CPU 100, and the speaker units
10, 20 are provided with local controllers CPU 11 and CPU 21, respectively. The main controller
CPU 100 detects the connection state of the speaker units 10 and 20 by communicating with the
local controller CPU 11 and CPU 21 and reads out the array pattern of the connected speaker
units, and the main controller CPU 100 detects each speaker unit An audio signal processing
control instruction according to the request is generated and output to each local controller CPU
11 and CPU 21. [Selected figure] Figure 2
Sound system
[0001]
The present invention relates to an acoustic system in which a plurality of acoustic units such as
speakers are arranged to form a predetermined sound field.
[0002]
Heretofore, various types of acoustic devices and acoustic systems have been devised to form a
desired sound field.
[0003]
17-04-2019
1
In Patent Document 1 and Patent Document 2, a speaker provided with a plurality of speakers
(sounding elements) arranged in a predetermined plane and a signal processing unit for
performing predetermined signal processing on audio signals given to these A system is
disclosed.
In this speaker system, a plurality of speakers are arranged and arranged in a predetermined
pattern on a wall or the like in a predetermined pattern, and delay processing is performed for
each audio signal given to each speaker to form a desired sound field.
JP-A-7-154893 JP-A-5-91596
[0004]
However, in the conventional sound device and sound system, the following problems to be
solved exist.
[0005]
In the speaker system described in Patent Document 1 and Patent Document 2, a desired sound
field and sound pressure are formed by arranging and arranging the required number of
speakers in a space requiring a sound field and sound pressure. However, each time a speaker
arrangement pattern according to the situation is formed, it is necessary to newly set the sound
signal control for forming a desired sound field and sound pressure from the beginning.
That is, the audio signal control to each speaker can not be flexibly coped with according to the
purpose of use of the user or the desired situation. For example, when the sound field is formed
in the entire room and when the sound field is formed in half of the room, the number of
required speakers and the signal processing of the audio signal output to each speaker are
different. At this time, in the speaker system shown in Patent Documents 1 and 2, it is necessary
to reconfigure the arrangement of the speakers and the signal processing of the audio signal
each time a new sound field is formed. And this problem corresponds to both the initial
construction state of the speaker and the additional installation or reduction installation after the
speaker construction.
17-04-2019
2
[0006]
Therefore, an object of the present invention is to freely form the desired sound field and sound
pressure according to the situation and flexibly according to the situation even when the speaker
is implemented or even after the additional reduction. To provide an acoustic system that can
[0007]
The acoustic system according to the present invention detects a connection state of a plurality
of acoustic units and a plurality of acoustic units each provided with an acoustic element
functioning as a speaker and signal processing means for delaying an audio signal to the acoustic
element. Detects an array pattern of a plurality of connected acoustic units from an array pattern
of acoustic units stored in advance, and generates sound field control instructions for realizing a
desired sound field based on the detection result to the plurality of acoustic units And control
means for outputting.
[0008]
In this configuration, when a plurality of acoustic units are arranged and arranged, the number of
acoustic units used and the arrangement pattern are detected.
For example, arrangement information such as the number of acoustic units arranged in the
horizontal direction, the number of acoustic units arranged in the vertical direction, and the
arrangement order of each acoustic unit is detected.
The control means performs delay processing or amplitude processing on the audio signal to
each acoustic unit so that a desired sound field is formed in a space (reproduction space)
requiring a sound field based on the detection result. To generate sound field control
instructions. The acoustic unit performs predetermined delay processing and amplitude
processing on each audio signal according to the sound field control command. Here, each
acoustic unit is formed by arranging a plurality of acoustic elements as smaller units, and the
delay processing and the amplitude processing are performed on the audio signal of each
acoustic element. Then, each of the acoustic elements of each acoustic unit emits a sound signal
subjected to delay processing and amplitude processing individually for each acoustic element,
thereby forming a desired sound field. Here, when the number of acoustic units arranged and
arranged and the arrangement pattern change, this change is detected, and a sound field control
instruction for forming a desired sound field is generated by the new arrangement pattern.
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3
[0009]
The acoustic system according to the present invention further comprises storage means for
storing an array pattern of a plurality of acoustic units and signal control parameters
corresponding thereto, and the control means determines from the storage means based on the
detected array pattern of acoustic units. It is characterized in that a corresponding signal control
parameter is read out to generate a sound field control command.
[0010]
In this configuration, since the arrangement pattern of the acoustic units and the signal control
parameter corresponding thereto are stored in advance, the control means can easily and
immediately generate the sound field control instruction only by reading the same.
[0011]
The acoustic system of the present invention is characterized in that a plurality of acoustic units
are constituted by one master acoustic unit and other slave acoustic units, and the master
acoustic unit is provided with control means.
[0012]
In this configuration, the control means is provided in the master sound unit, so that there are
fewer physical components of the whole sound system than they exist separately.
[0013]
According to the present invention, an acoustic unit is detected by detecting the number and
arrangement pattern of acoustic units arranged and connected, and performing delay processing
and amplitude processing according to the detection result for each acoustic element of each
acoustic unit. The delay processing and the amplitude processing can be flexibly changed in
accordance with the arrangement connection situation of the above to construct an acoustic
system that forms a desired sound field.
[0014]
An acoustic system according to an embodiment of the present invention will be described with
reference to FIGS. 1 to 3.
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4
In addition, although the case where two speaker units are used is demonstrated in the
description shown below, the number of speaker units should just be plural.
FIG. 1 is a perspective view showing a schematic configuration of the acoustic system of the
present embodiment, and FIG. 2 is a block diagram showing a schematic circuit of the acoustic
system of the present embodiment.
[0015]
As shown in FIG. 1, the acoustic system of the present embodiment is referred to as two
electrostatic flat loudspeaker units (hereinafter simply referred to as "speaker units").
And 20) and a controller unit 100 electrically connected to them.
Here, the speaker units 10 and 20 correspond to the "sound unit" of the present invention, and
the controller unit 100 corresponds to the "control means" of the present invention.
[0016]
The controller unit 100 includes a main controller CPU 100, a signal processing unit DSP 100,
and a memory M100 for storing an arrangement pattern of speaker units and signal control
parameters for the corresponding reproduction space.
[0017]
The main controller CPU 100 is connected to the local controllers CPU 11 and CPU 21 of the
respective speaker units 10 and 20 to perform the following signal processing.
FIG. 3 is a diagram showing the setting of directivity in the case of one speaker unit and in the
case of two speaker units, and shows the case of (a) being one and the case of (b) being two.
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FIG. 4 is a flowchart showing the main processing of the main controller CPU 100. FIG. 5 is a
conceptual diagram showing parameters stored in the memory M100.
[0018]
The main controller CPU 100 communicates with the local controller CPU 11 and CPU 21 at a
predetermined timing (S1). At this time, if the local controller CPU 11 and CPU 21 are connected,
a connection confirmation signal is returned, and the main controller CPU 100 detects the
connection of the local controller CPU 11 and CPU 21, that is, the connection of the speaker
units 10 and 20 (S2) . At this time, an array number is previously set in each speaker unit (local
controller CPU), and the array pattern of the speaker units can be detected by communicating the
array number when the connection confirmation signal is returned.
[0019]
Next, the main controller CPU 100 reads out from the memory M100 a signal control parameter
corresponding to the detected array of local controllers (speaker units) (S3).
[0020]
Here, as shown in FIG. 5, the pattern (arrangement pattern) of the detected local controller CPU
and signal control parameters corresponding to these patterns are stored in the memory M100,
and more specifically, the arrangement Signal control parameters such as delay control
parameters and amplitude control parameters for each speaker SP are stored for each pattern.
For example, if connection of only the local controller CPU 11 is confirmed, as shown in FIG. 3A,
a signal control parameter for emitting an audio signal having strong directivity in the direction
of the speaker 200 only with the speaker unit 10 Is stored. Further, if the connection of the local
controller CPUs 11 and 21 is confirmed, as shown in FIG. 3B, the speaker units 10 and 20 emit a
voice signal having strong directivity in the direction of the speaker 200. Control parameters are
stored.
[0021]
Then, the main controller CPU 100 generates a sound field control command including a delay
control parameter and an amplitude control parameter for forming a sound field based on the
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signal control parameter for the reproduction space by the two speaker units 10 and 20. It
outputs to each of controller CPU11 and CPU21 (S4).
[0022]
Here, the main controller CPU 100 may communicate with the local controllers CPU 11 and CPU
21 in a time division manner and may output individual control contents as sound field control
commands to each of the local controllers CPU 11 and CPU 21. May be output by one sound field
control command.
In this latter case, the local controller to be received is designated in the sound field control
command, and each local controller CPU 11 and CPU 21 acquires only the necessary information
of the sound field control command in accordance with the contents of the controller
designation.
[0023]
The above-mentioned confirmation of the local controller CPU, that is, the confirmation of the
connected speaker unit can be performed similarly even when the sound system is installed or
when the speaker unit is added or reduced after the installation. That is, it is processed flexibly
according to the difference in the connection state of the speaker unit.
[0024]
The signal processing unit DSP 100 is connected to an external sound source such as an audio
reproduction device, and is connected to the signal processing units DSP 11 and DSP 21 of each
of the speaker units 10 and 20. The signal processing unit DSP100 inputs an analog format
audio signal such as a reproduced audio signal and converts it into a digital signal or outputs an
audio signal in digital format to the signal processing units DSP11 and DSP21 of the respective
speaker units 10 and 20. Do. These signal processing units DSP11 and DSP21 correspond to the
"signal processing means" of the present invention.
[0025]
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7
The speaker unit 10 is referred to as a plurality of electrostatic type flat plate speakers
(hereinafter simply referred to as "speakers") each having a speaker function independently. )
SP11 to SP18 are provided. The speakers SP11 to SP18 are formed in a strip shape (a
rectangular shape in which the longitudinal direction is relatively longer than the short direction)
when viewed from the front, and are arranged at predetermined intervals with the short direction
as the arrangement direction. The speaker unit 10 is installed with the arrangement direction of
the speakers SP11 to SP18 as the horizontal direction. Here, the speaker SP corresponds to the
"acoustic element" of the present invention.
[0026]
The speaker unit 10 also includes amplifiers PA11 to PA18 connected to the respective speakers
SP11 to SP18, DA converters DA11 to DA18 connected to the respective amplifiers PA11 to
PA18, and signal processing connected to the DA converters DA11 to DA18. And a local
controller CPU11 for controlling the signal processing unit DSP11. In the present embodiment, a
speaker unit including eight speakers SP, eight amplifiers PA, and eight DA converters DA has
been described. However, the number of speakers SP, amplifiers PA, and DA converters DA is not
limited to this.
[0027]
Further, in the speaker unit 10, input / output units (not shown) individually connected to the
local controller CPU 11 and the signal processing unit DSP 11 are formed on the unit outer
surface. The input / output unit is connected to the controller unit 100 via a wiring cable. In
addition, another input / output unit is connected to the input / output unit of the speaker unit
20. Then, the sound field control command from the main controller CPU 100 of the controller
unit 100 is transmitted to the local controller CPU 11 of the speaker unit 10 via the controller
side input / output unit and the wiring cable, and output from the signal processing unit DSP 100
of the controller unit 100 An audio signal in digital form is transmitted to the signal processing
unit DSP 11 of the speaker unit 10. Further, a sound field control command from the main
controller CPU 100 of the controller unit 100 is transmitted to the local controller CPU 21 of the
speaker unit 20 via the controller side input / output unit and the speaker unit 20 side input /
output unit. An audio signal in digital format output from the processing unit DSP 100 is
transmitted to the signal processing unit DSP 21 of the speaker unit 20.
17-04-2019
8
[0028]
The local controller CPU 11 outputs a local signal processing control instruction to the signal
processing unit DSP 11 based on the sound field control instruction input from the main
controller CPU 100 described above. The local signal processing control instruction is an
instruction to control the delay relationship and the amplitude relationship of the audio signal to
be input to each of the speakers SP11 to SP18, that is, the delay control parameter and the
amplitude control parameter stored in the memory M100 described above. It is a control
command to be realized.
[0029]
The signal processing unit DSP 11 receives a local signal processing control command from the
local controller CPU 11 and also receives a digital audio signal output from the signal processing
unit DSP 100 of the controller unit 100. The signal processing unit DSP11 converts the digital
audio signal into audio signals for the speakers SP11 to SP18 based on the local signal
processing control command input from the local controller CPU11. Specifically, eight in-phase
and equal-amplitude audio signals are generated from the input digital audio signal, and each of
the generated audio signals is generated for delay control processing and amplitude control
processing based on the local signal processing control command. To do. Then, the eight audio
signals having the predetermined delay relationship and amplitude relationship are output to the
DA converters DA11 to DA18.
[0030]
Each of the DA converters DA11 to DA18 converts the input digital audio signal into an analog
audio signal, and outputs it to each of the amplifiers PA11 to PA18.
[0031]
Each of the amplifiers PA11 to PA18 amplifies the input audio signal in analog format and
outputs the amplified signal to each of the speakers SP11 to SP18.
The speakers SP11 to SP18 emit sound in the front direction by the vibration of the diaphragm
17-04-2019
9
due to the input audio signal.
[0032]
With such a configuration, the delays of the sounds emitted from the speakers SP11 to SP18
have a predetermined relationship, and the directivity in the horizontal direction can be obtained
according to the delay relationship.
[0033]
The speaker unit 20 includes electrostatic flat plate speakers SP21 to SP28, amplifiers PA21 to
PA28, DA converters DA21 to DA28, a signal processing unit DSP21, and a local controller
CPU21.
The components of the speaker unit 20 have the same structure as the components of the
speaker unit 10, and the connection relationship is also the same.
[0034]
Further, the speaker unit 20 is provided with an input / output unit as in the speaker unit 10,
and this input / output unit is connected to the input / output unit of the controller unit 100 via
the two input / output units of the speaker unit 10. ing. Thus, the local controller CPU 21 is
connected to the main controller CPU 100, and the signal processing unit DSP 21 is connected to
the signal processing unit DSP 100.
[0035]
With such a configuration, the delays and the amplitudes of the sounds emitted from the
speakers SP21 to SP28 have a predetermined relationship, so that a predetermined directivity in
the horizontal direction is obtained according to the delay relationship and the amplitude
relationship. Be
[0036]
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10
Then, as described above, the main controller CPU 100 of the control unit 100 generates a sound
field control command instructing delay processing and amplitude processing of the entire audio
signal including the speaker units 10 and 20, and the local controllers CPU 11 and 21. Since the
audio signal to each of the speakers SP11 to SP18, SP21 to SP28 is subjected to delay processing
and amplitude processing, the sound emitted from each of the speakers SP11 to SP18, SP21 to
SP28 of each speaker unit 10, 20 has a predetermined delay. Relationship and amplitude
relationship.
As a result, predetermined directivity in the horizontal direction can be obtained by the speakers
SP of the entire acoustic system, and a desired sound field and sound range can be formed.
[0037]
By the way, the user may change the number of speaker units to be used in order to obtain a
desired sound field and sound range. For example, in order to obtain sound pressure and
frequency characteristics that can not be realized only by the already connected speaker units,
increase the number of speaker units or decrease the number of speaker units in a state where
more speaker units are connected than necessary. To
[0038]
The case where the connection state of the speaker unit changes as described above will be
described next.
[0039]
(1) When changing from two speaker units to n speaker units FIG. 6A is a perspective view
showing a state in which n speaker units 10 to n0 are connected, and the speaker SP of each
speaker unit, The controller unit 100 is not shown.
[0040]
When the state where the two speaker units 10 and 20 are connected changes to the state where
the n speaker units 10 to n0 are connected, the main controller CPU 100 can communicate with
each local controller of the speaker units 10 to n0. Become.
17-04-2019
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Therefore, the main controller CPU 100 detects that n local controllers are connected.
[0041]
At this time, the arrangement positional relationship of the n speaker units is stored in advance
in the memory of the control unit 100, and when the main controller CPU 100 detects the n local
controllers, it reads out the n arrangement positional relationships and connects them. The
speaker arrangement pattern by n speaker units being detected is detected.
Then, the main controller CPU 100 generates a sound field control command for forming a sound
field having desired directivity according to the arrangement pattern of the speaker units 10 to
n0 whose connection is detected, and the local controller of each speaker unit 10 to n0 Output to
Each local controller outputs a local signal processing control instruction for performing
predetermined delay processing and amplitude processing to each of the plurality of speakers
provided in the speaker unit based on the input sound field control instruction. Each signal
processing unit DSP performs delay processing, amplitude processing, and processing in the
frequency axis direction on an audio signal input to n speaker units in accordance with the local
signal processing control command. Thereby, an optimum sound field can be realized by the n
speaker units. In addition, since the horizontal length of the entire speaker unit is increased by
increasing the number of speaker units in the horizontal direction, output characteristics in a
frequency band lower than the frequency band reproduced by two speaker units are improved.
can do. As a result, it is possible to widen the reproducible frequency band as an acoustic system.
[0042]
When the sound system is composed of n speaker units in this way, even if the speaker units to
be used are changed, the connected speaker units and the arrangement pattern of these speaker
units are detected each time. It is possible to perform delay processing and amplitude processing
to obtain optimum directivity to form a desired sound field.
[0043]
(2) When changing from two speaker units to n × (m + 1) speaker units FIG. 6B is a perspective
view showing a state in which n × (m + 1) speaker units 10 to 10 nm are connected and The
illustration of the speaker SP of each speaker unit and the controller unit 100 is omitted.
17-04-2019
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[0044]
When the state in which the two speaker units 10 and 20 are connected changes to the state in
which n × (m + 1) speaker units 10 to 10 nm are connected, the main controller CPU 100
controls each local controller of the speaker units 10 to 10 nm and Communication is possible.
Therefore, the main controller CPU 100 detects that n × (m + 1) local controllers are connected.
[0045]
At this time, the arrangement positional relationship of the n × (m + 1) speaker units is stored in
advance in the memory of the control unit 100, and when the main controller CPU 100 detects n
× (m + 1) local controllers, The (m + 1) arrangement positional relationship is read out, and a
speaker arrangement pattern by n × (m + 1) speaker units connected is detected.
Then, the main controller CPU 100 generates a sound field control command for forming a sound
field having desired directivity according to the arrangement pattern of the speaker units 10 to
nm whose connection is detected, and the local controller of each speaker unit 10 to nm Output
to Each local controller outputs a local signal processing control instruction for performing
predetermined delay processing and amplitude processing to each of the plurality of speakers
provided in the speaker unit based on the input sound field control instruction. Each signal
processing unit DSP performs delay processing, amplitude processing, and processing in the
frequency axis direction on an audio signal to be input to n × (m + 1) speaker units in
accordance with the local signal processing control command. Thereby, an optimal sound field
can be realized by n × (m + 1) speaker units.
[0046]
Here, n × (m + 1) speaker units are arranged in n horizontal and m + 1 vertical two-dimensional
array patterns, thus providing directivity in two horizontal and vertical directions. be able to.
[0047]
When an acoustic system is configured with n × (m + 1) speaker units in this manner, even if the
speaker units to be used are changed, the connected speaker units, the arrangement pattern of
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these speaker units, and the like Can be detected, and delay processing and amplitude processing
can be performed to obtain optimum directivity, and a desired sound field can be formed in the
horizontal and vertical directions.
[0048]
(3) When Two Speaker Units Change to One Speaker Unit When the two speaker units 10 and 20
are initially connected, the main controller CPU 100 uses the two speaker units 10 and 20
according to the method described above. The presence of the local controllers CPU11 and
CPU21 is detected.
Then, a sound field control command for forming a desired sound field is generated by the two
speaker units 10 and 20 and output to each local controller CPU 11 and CPU 21.
[0049]
Here, when the controller unit 100 and the speaker unit 20 are separated, the main controller
CPU 100 can not communicate with the local controller CPU 21.
Therefore, the main controller CPU 100 detects that only the local controller CPU 11 is
connected. That is, it detects that only the speaker unit 10 is connected. As a result, the main
controller CPU 100 generates a sound field logic control command for forming a sound field only
with the speaker unit 10, and outputs the command to the local controller CPU 11.
[0050]
Local controller CPU 11 outputs a local signal processing control command for performing
predetermined delay processing and amplitude processing to each of the plurality of speakers
SP11 to SP18 provided in speaker unit 10 based on the input sound field control command. Do.
The signal processing unit DSP11 performs delay processing and amplitude processing on the
audio signal to be input to the speakers SP11 to SP18 according to the local signal processing
control instruction. Thereby, an optimal sound field is realized by one speaker unit 10.
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[0051]
As described above, by using the configuration and control of the present invention, it is possible
to perform optimal audio signal processing (delay processing and amplitude processing) for each
speaker unit, and hence for each speaker, according to the number of connected speaker units. it
can. Thus, it is possible to realize an acoustic system that forms an optimal sound field according
to the connection state of the speaker and the speaker unit. In other words, it is possible to
realize an acoustic system that reconfigures the optimal sound field flexibly according to the
installation situation of the speaker.
[0052]
In other words, if the desired sound field and the number and arrangement of speakers for
reproducing the sound range are performed, optimal delay and amplitude processing are set
according to the number and arrangement of the speakers. As a result, it is possible to configure
an acoustic system which realizes the desired sound field and range under the optimum
conditions by combining the speaker units in accordance with the reproduction space.
[0053]
Although the control unit is formed separately from the speaker unit in the above description, the
control unit may be built in one speaker unit. In this case, a speaker unit in which the control unit
is built is used as a master speaker unit, and the other speaker unit is used as a slave speaker
unit to constitute an audio system. Even if it is such composition, the above-mentioned effect can
be produced. Furthermore, by not separately forming the control unit, the components of the
acoustic system can be reduced, and space saving and cost reduction can be realized. In addition,
since the sound system is configured only with the speaker unit, the degree of freedom in the
arrangement of the sound system is improved.
[0054]
Moreover, although the above description demonstrated the sound system of the sound emission
by several speaker (speaker unit), it can apply as an acoustic system of sound collection by
setting it as the circuit structure which uses these speakers as a microphone .
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[0055]
The perspective view which shows schematic structure of the acoustic system which concerns on
this invention The block diagram which shows the schematic circuit of the acoustic system which
concerns on this invention The figure which shows the setting state of the directivity in the case
where one speaker unit and two cases Flow chart showing main processing Conceptual view
showing parameters stored in the memory M100 A perspective view showing another
configuration of the sound system according to the present invention
Explanation of sign
[0056]
10, nm-speaker unit 100-control unit 200-speaker CPU-controller DSP-signal processing unit DADA converter PA-amplifier SP-speaker M-memory
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