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JP2012065007

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DESCRIPTION JP2012065007
In a speaker device capable of providing directivity using a speaker array, a range in which a
sense of stereo can be obtained is broadened while bringing a difference in volume balance
between right and left due to a difference in listening position close to a general sense of stereo
about. A speaker device according to an embodiment of the present invention corresponds to
each of a plurality of speaker units by applying a signal processing to a speaker array in which a
plurality of speaker units are provided on the front surface of a housing and audio data. And
signal processing means for generating audio data to be supplied. In the content of this signal
processing, a virtual focal point, which is a virtual output position of sound based on one channel
output from a plurality of speaker units provided in the first area, is set to the rear side of the
first area And first signal processing for setting a virtual focal point of sound based on another
channel output from the plurality of speaker units provided in the second region to the rear side
of the second region. [Selected figure] Figure 4
Speaker device
[0001]
The present invention relates to a technology using a speaker array.
[0002]
A speaker device having a speaker array in which a plurality of speaker units are arranged can
impart directivity to an audio signal and output it.
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1
In such a speaker device, directivity is given to emit sound, and the focus of the sound is directed
to the wall surface, so that the listener can be made to reach the listener using wall reflection and
give the listener a surround feeling. It can do (for example, patent document 1).
[0003]
JP, 2006-25153, A
[0004]
When the surround effect is realized by the technology described in Patent Document 1, the
listener feels that sounds reach from various directions such as right and left and back even if the
speaker device is present only in front of the listener.
Therefore, the listener can watch movies and the like in a realistic state. On the other hand, the
place where the surround effect can be obtained is a place of a limited range due to the relation
using the wall reflection, and when the place is moved, there may be a case where the surround
feeling can not be obtained. The listener may watch while performing some other action when
watching a general television program or the like instead of watching a movie. At this time, when
the listener moves from the range where the surround effect can be obtained, not only the stereo
feeling can not be obtained, but also the listener may feel discomfort due to the change of the
sound quality.
[0005]
When this television program or the like is stereo (2ch) broadcasting, the speaker device does
not use wall reflection, directs the focus of the sound toward the listener, and the sound of Lch is
the sound of the listener's left ear and Rch. It is also possible to make it reach the listener's right
ear, but even in this case, the listener's listening area becomes narrow. Therefore, the listener not
only can not obtain a stereo feeling by moving a little, but also may feel discomfort due to a
change in sound quality. Also, since both the Lch sound and the Rch sound are emitted from all
the speaker units, the listener has little sense of separation of the sound images of the respective
channels, which also results in little stereo feeling being obtained. .
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[0006]
By the way, the speaker apparatus which can give directivity can also be emitted so that it may
be spread forward (viewing from a speaker apparatus and the listener side). At this time, if the
speaker device places a virtual focal point (hereinafter referred to as a virtual focal point) which
is a virtual output position of sound on the rear side of the speaker device, the sound emission
range expands to the listener side (See Figure 5). On the other hand, as described above, since
the Lch sound and the Rch sound are emitted from all the speaker units, the sense of separation
of the sound image of each channel is small. Also, since the sound of Rch is output to the left of
the listener as a whole and the sound of Lch is spread to the right of the listener as a whole, for
example, the listener moves toward the speaker device to the left Then, there was a case that I
felt discomfort with the left and right volume balance, such as the sound of Rch was louder than
the sound of Lch despite the fact that I was on the left side.
[0007]
The present invention has been made in view of the above-described circumstances, and in a
speaker device capable of providing directivity using a speaker array, the difference in volume
balance between the left and right due to the difference in listening position can be perceived as
a general stereo sense. The objective is to widen the range in which the sense of stereo can be
obtained while approaching to.
[0008]
In order to solve the problems described above, according to the present invention, a speaker
array in which a plurality of speaker units for outputting a sound according to supplied audio
data is provided on the front surface of a casing, and acquisition for acquiring audio data of a
plurality of channels Signal processing means for performing signal processing on the audio data
of each channel acquired by the acquisition means, and generating the supplied audio data
corresponding to each of the plurality of speaker units; Control means for controlling the content
of signal processing in the signal processing means, and the content of the signal processing
controlled by the control means includes a plurality of speakers provided in a first area which is
a part of the front surface The unit outputs a sound based on audio data of one channel, and a
first virtual focus that is a virtual output position of the sound. Is set to the rear side of the
housing from the first area, and from a plurality of speaker units provided in a second area which
is a part of the front surface and is different from the first area to audio data of another channel
A first signal processing for outputting a sound based on the first area and setting a second
virtual focal point, which is a virtual output position of the sound, to the rear side of the casing
with respect to the second area; There is provided a speaker device including: second signal
processing for giving directivity to sounds output from a plurality of speaker units provided in a
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region including two regions.
[0009]
Further, in another preferable aspect, the first area includes a position at which the speaker unit
closest to one end side in the longitudinal direction of the housing among the plurality of speaker
units is provided, and the second area is It is characterized by including the position where the
speaker unit nearest to the other end side of the above-mentioned case was provided.
[0010]
Further, in another preferable aspect, the first signal processing sets the first virtual focus on the
rear side of the housing in the central portion of the first area, and the second virtual focus is in
the second area. It is a process set to the back side of the above-mentioned case in the central
part of the above.
[0011]
In another preferred aspect, the first signal processing includes processing to move the position
of the first virtual focus and the position of the second virtual focus in the same direction in
response to an instruction to change the focus position. It is characterized by
[0012]
In another preferred embodiment, the first area and the second area do not have overlapping
areas.
[0013]
According to the present invention, in a speaker device capable of imparting directivity using a
speaker array, a range in which a sense of stereo can be obtained while bringing a difference in
volume balance between left and right due to a difference in listening position closer to a general
stereo feeling Can be broadened.
[0014]
It is a block diagram explaining the composition of the speaker apparatus in the embodiment of
the present invention.
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It is a figure explaining the external appearance of the speaker apparatus in the embodiment of
the present invention.
It is a figure explaining the structure in the sound processing part in embodiment of this
invention.
It is a figure explaining the arrival range of the radiation sound in the embodiment of the present
invention.
It is a figure explaining the reach | attainment range of the radiation sound in a prior art
example.
It is a figure explaining the reach | attainment range of a radiation sound about the modification
1 of this invention, and a prior art example.
It is a figure explaining the reach | attainment range of a radiation sound about the modification
2 of this invention, and a prior art example.
It is a figure explaining the reach | attainment range of a radiation sound about the modification
3 of this invention, and a prior art example. It is a figure explaining the reach | attainment range
and virtual focus position of the radiation sound in the modification 4 of this invention. It is a
figure explaining the arrival range and virtual focal position of the radiation sound in
modification 5 of the present invention. It is a figure explaining the reach | attainment range and
virtual focus position of the radiation sound in the modification 6 of this invention. It is a figure
explaining the reach | attainment range and virtual focus position of the radiation sound in the
modification 7 of this invention. It is a figure explaining the arrangement | positioning aspect of
the speaker unit in the modification 8 of this invention, and a sound emission part.
[0015]
Embodiment [Overall Configuration] FIG. 1 is a block diagram for explaining the configuration of
a speaker device 1 according to an embodiment of the present invention. The speaker device 1
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includes a control unit 3, a storage unit 4, an operation unit 5, an interface 6, and a sound
processing unit 10. Each of these configurations is connected via a bus. The speaker device 1
further includes a speaker array unit 2 having a plurality of speaker units connected to the sound
processing unit 10. The speaker device 1 performs signal processing on audio data in the sound
processing unit 10 to output a sound to which directivity is given from the speaker array unit 2.
In addition, the speaker device 1 performs signal processing on audio data in the sound
processing unit 10, thereby setting a virtual focus behind the speaker array unit 2 and outputting
sound that spreads radially forward. In the following description, among the sounds output from
the speaker array unit 20, the sound to which directivity is given is referred to as a beam sound,
and the sound that spreads radially is referred to as a radiation sound.
[0016]
The control unit 3 includes a central processing unit (CPU), a random access memory (RAM), a
read only memory (ROM), and the like. The control unit 3 controls each unit of the speaker
device 1 via the bus by executing a control program stored in the storage unit 4 or the ROM. The
control unit 3 also functions as, for example, a control unit that controls the sound processing
unit 10 and controls parameter setting in each process performed in the sound processing unit
10.
[0017]
The storage unit 4 is a storage unit such as a non-volatile memory, and stores setting parameters
and the like used in control in the control unit 3. The setting parameters include parameters set
in the acoustic processing unit 10 according to the position of the virtual focus of the radiation
sound. The setting parameters include parameters set in the sound processing unit 10 according
to the direction in which the beam sound is output.
[0018]
Also, the beam sound output from the speaker device 1 is reflected on the wall of the room in
which the speaker device 1 is installed to reach the sound receiving point where the listener is
located, and to reach the sound receiving point The storage unit 4 also stores beam information
on an output direction of the beam sound, a time until the beam sound from the speaker device 1
directly reaches the sound receiving point, and an output direction of the beam sound at that
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time. The beam information is calculated from the result of measuring the sound input to the
microphone previously installed at the sound receiving point while outputting the beam sound
from the speaker device 1 installed in the room and changing the output direction. This
measurement is performed, for example, when the environment such as the installation position
of the speaker device 1, the room to be installed, and the sound receiving point is changed, and is
started by the operation of the operation unit 5 by the user.
[0019]
The operation unit 5 includes operation means such as a volume for adjusting the volume level
and an operation button for inputting an instruction to change the setting, and outputs
information indicating the content of the operation to the control unit 3. The interface 6 is an
input terminal for obtaining the audio data Sin from the outside. Subsequently, a speaker array
unit 2 having a plurality of speaker units will be described with reference to FIG.
[0020]
[Speaker Unit Arrangement] FIG. 2 is a view for explaining the appearance of the speaker device
1 according to the embodiment of the present invention. In this example, the speaker device 1
has a substantially rectangular parallelepiped casing 100. As shown in FIG. 2, the speaker device
1 has a plurality of speaker units 20-1, 20-2,..., 20-14 constituting the speaker array unit 2. The
speaker units 20-1, 20-2,..., 20-14 are substantially nondirectional speaker units, and the front
direction 100F of the housing 100 of the speaker device 1 ) Are provided side by side. The front
surface 100F is a surface that is located on the front side, which is a direction in which the
listener is mainly located, as viewed from the speaker device 1 among the surfaces that configure
the housing 100.
[0021]
The speaker array unit 2 can output beam sound in a specific direction included in the horizontal
plane by outputting sound from the speaker units 20-1, 20-2, ..., 20-14. . The beam sound may be
the one in which the focus of the sound is set in front of the speaker array unit 2 and in the
horizontal plane, or the focus is not set so as to become a parallel beam sound in the horizontal
plane It is also good. In addition, the speaker array unit 2 can also output a radiation sound in
which a virtual focus is set behind the speaker array unit 2 in the horizontal plane. Subsequently,
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the configuration of the sound processing unit 10 will be described with reference to FIG.
[0022]
[Configuration of Sound Processing Unit 10] FIG. 3 is a diagram for explaining the configuration
of the sound processing unit 10 according to the embodiment of the present invention. The
sound processing unit 10 includes an equalizer unit (EQ) 11, a signal processing unit (DirC) 12,
an addition unit 13, a D / A unit 14, and an amplification unit 15. The equalizer unit 11 and the
signal processing unit 12 are provided according to the maximum number of channels included
in the audio data Sin input from the interface 6. In this example, C (center) ch, FL (front L) ch, FR
It is assumed that it is configured to correspond to 5ch of (front R) ch, SL (surround L) ch, and SR
(surround R) ch. Although it is good also as 5.1ch including a channel outputted from a sub
woofer etc., it explains as what is 5ch in this example. Hereinafter, the audio data corresponding
to FLch among the audio data Sin will be described by the description such as the audio data FL.
Further, among the equalizer units 11, for example, those corresponding to FLch will be
described by the description such as the equalizer unit 11-FL.
[0023]
The equalizer unit 11 includes equalizer units 11-C, 11-FL, 11-FR, 11-SL, and 11-SR. The
equalizer unit 11 applies the frequency characteristic preset by the control unit 3 to the input
audio data and outputs the same. As to the audio data Sin input to the interface 6, in this
example, the audio data Sin input from the interface 6 is configured by the above five channels or
configured by two stereo channels (Lch, Rch). There shall be cases.
[0024]
When the audio data Sin input from the interface 6 is 5ch, the audio data C, FL, FR, SL, SR
correspond to the equalizers 11-C, 11-FL under the control of the control unit 3, respectively. ,
11-FR, 11-SL, and 11-SR. When the audio data Sin input from the interface 6 is 2ch, the audio
data L is input to the equalizer 11-FL and the audio data R is input to the equalizer 11-FR under
the control of the controller 3. . Audio data is not input to the other equalizer units 11-C, 11-SL,
and 11-SR.
03-05-2019
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[0025]
The signal processing unit 12 includes signal processing units 12-C, 12-FL, 12-FR, 12-SL, and 12SR. The signal processing units 12-C, 12-FL, 12-FR, 12-SL, and 12-SR respectively correspond to
the equalizer units 11-C, 11-FL, 11-FR, 11-SL, and 11-SR, respectively. Audio data is input. The
signal processing units 12-C, 12-FL, 12-FR, 12-SL, and 12-SR perform delay, level adjustment,
and the like on the input audio data with contents controlled by the control unit 3. Signal
processing is performed to generate audio data to be supplied corresponding to each of the
speaker units 20-1, 20-2,..., 20-14, and the generated audio data are respectively corresponding
to the speaker units 20-1. , 20-2, ..., 20-14 are supplied to the signal lines to be connected.
[0026]
The contents of the signal processing include first signal processing for outputting a radiation
sound from the speaker array unit 2 and second signal processing for outputting a beam sound
from the speaker array unit 2. In this example, when the number of channels of the audio data
Sin input to the interface 6 is 2ch, the signal processing unit 12 is controlled by the control unit
3 so that the first signal processing is performed, and the number of channels is In the case of 5
channels, the control unit 3 controls the second signal processing to be performed.
[0027]
The first signal processing is processing to be used when the number of channels of the audio
data Sin is 2ch, so that the first signal processing is signal processing using the signal processing
units 12-FL and 12-FR, and the other signal processing units 12-C. , 12-SL and 12-SR are not
used because audio data is not input.
[0028]
The signal processing unit 12-FL includes a plurality of speaker units 20-1, 20-2,... Provided in an
area (hereinafter referred to as Lch front area LP (see FIG. 2 and FIG. 4)) which is a part of the
front surface 100F. The audio data corresponding to 20-7 is generated by performing signal
processing on the audio data L input from the equalizer unit 11-FL.
The signal processing unit 12 -FL outputs a radiation sound by the sound emission from the
03-05-2019
9
speaker units 20-1, 20-2,..., 20-7, and a virtual focus (hereinafter referred to as Lch virtual focus
LG) of the radiation sound. The parameter of the signal processing is set such that (see FIG. 4) is
located on the rear side of the chassis 100 from the Lch front surface area LP. The signal
processing unit 12-FR includes a plurality of speaker units 20-8, 20-9,... Provided in a partial area
of the front surface 100F (hereinafter referred to as Rch front surface area RP (see FIGS. 2 and
4)). The audio data corresponding to 20-14 is generated by performing signal processing on the
audio data R input from the equalizer unit 11-FR. The signal processing unit 12-FR outputs a
radiation sound by the emitted sound from the speaker units 20-8, 20-9,..., 20-14, and a virtual
focus of the radiation sound (hereinafter, Rch virtual focus RG) The parameter of the signal
processing is set such that (see FIG. 4) is located on the rear side of the chassis 100 with respect
to the Rch front surface region RP. These parameters are determined by the control unit 3 with
reference to the parameters stored in the storage unit 4.
[0029]
The second signal processing is signal processing using the signal processing units 12-C, 12-FL,
12-FR, 12-SL, and 12-SR. The signal processing unit 12-FL is an area including the Lch front area
LP and the Rch front area RP, that is, audio data corresponding to the speaker units 20-1, 20-2,...,
20-14 provided on the front 100F. Are generated by performing signal processing on the audio
data FL input from the equalizer unit 11-FL. The signal processing unit 12 -FL sets parameters of
signal processing so that beam sound is output by the sound emission from the speaker units 201, 20-2,..., 20-14. The pointing direction of the beam sound is determined according to the beam
information stored in the storage unit 4. In this example, the pointing direction is determined so
as to reflect and reach the left wall of the listener. Similarly to the signal processing unit 12-FL,
the other signal processing units 12-C, 12-FR, 12-SL, and 12-SR also have speaker units 20-1, 202, ..., 20-14. Are generated by performing signal processing on the audio data input from the
equalizer unit 11. The directivity direction of the beam sound output corresponding to each
channel from the speaker units 20-1, 20-2, ..., 20-14 is determined according to the beam
information stored in the storage unit 4. Be done. The parameters set in the signal processing
units 12-C, 12-FL, 12-FR, 12-SL, and 12-SR are determined by the control unit 3 with reference
to the parameters stored in the storage unit 4.
[0030]
The addition unit 13 includes addition units 13-1, 13-2, ..., 13-14. The addition unit 13-1 adds
the audio signal supplied from the directivity control units 12-SL, 12-FL, 12-C, 12-FR, 12-SR to
the signal line corresponding to the speaker unit 20-1 . Similarly, the adders 13-2, 13-3, ..., 13-14
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are supplied to the signal lines respectively corresponding to the speaker units 20-2, 20-3, ..., 2014. Add each audio data.
[0031]
The D / A unit 14 includes D / A units 14-1, 14-2, ..., 14-14. The D / A units 14-1, 14-2, ..., 14-14
perform digital-to-analog conversion on the audio data added by the addition units 13-1, 13-2, ...,
13-14, It outputs an audio signal obtained by conversion. The amplification unit 15 includes
amplification units 15-1, 15-2, ..., 15-14. The amplification units 15-1, 15-2, ..., 15-14 amplify the
audio signal output from the D / A units 14-1, 14-2, ..., 14-14, and the speaker unit 20-1, 20-2, ...,
20-14 to emit sound. As described above, the sound output from the speaker array unit 2 is
output as a radiation sound when the first signal processing is performed in the signal processing
unit 12, and the beam is output when the second signal processing is performed. It is output as a
sound. The above is the description of the configuration of the sound processing unit 10.
Subsequently, the radiation sound output when the first signal processing is performed in the
signal processing unit 12 will be described using FIG. 4.
[0032]
[Range of Radiation Sound] FIG. 4 is a view for explaining the reach of radiation sound in the
embodiment of the present invention. As shown in FIG. 4A, the sound based on the audio data L
is output from the speaker units 20-1, 20-2,. The Lch virtual focus LG of the emitted sound is set
on the rear side (the direction of the arrow AR1) of the housing 100 at the center of the Lch front
area LP which is a part of the front 100F. The central portion of the Lch front region LP is a
substantially central portion of the Lch front region LP in the direction in which the speaker units
are arranged, and in this example, it is a portion of the speaker unit 20-4 provided at the center.
As described above, since the Lch virtual focus LG is set, the radiation sound based on the audio
data L is spread and output substantially in the Lch radiation area LA. On the other hand, the
sound based on the audio data R is output as a radiation sound from the speaker units 20-8, 209,. The Rch virtual focal point RG of the emitted sound is set on the rear side (the direction of the
arrow AR1) of the housing 100 at the center of the Rch front surface region RP which is a part of
the front surface 100F. The central portion of the Rch front region RP is a substantially central
portion of the Rch front region RP in the direction in which the speaker units are arranged, and
in this example, it is a portion of the speaker unit 20-11 provided at the center. As described
above, since the Rch virtual focal point RG is set, the radiation sound based on the audio data R is
generally spread and output in the Rch radiation area RA. Thus, since the Lch virtual focus LG
and the Rch virtual focus RG are set to be located, these virtual focus distances SW substantially
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match the distance from the speaker unit 20-4 to the speaker unit 20-11. Do.
[0033]
FIG. 4 (b) is a view showing a wider range than the range shown in FIG. 4 (a) for the Lch radiation
area LA and the Rch radiation area RA. The listener 2000 is located in front of the speaker device
1. The area L + R in which the position of the listener 2000 is included is an area in which the
Lch radiation area LA and the Rch radiation area RA overlap, and is an area that can give the
listener 2000 a stereo feeling. On the other hand, the listener 2000 moves to the left while facing
the stereo device 1 (hereinafter, in the case of simply moving to the left, it faces the direction of
the stereo device 1, and the same applies to the right). When it deviates from the Rch radiation
area RA, the Rch sound is greatly attenuated and the Lch sound is strongly heard, so the sense of
stereo is lost. When the listener 2000 moves to the opposite side, the listener 2000 strongly
listens to the Rch sound, and the sense of stereo is lost. That is, the area that gives the listener
2000 a sense of stereo is the area L + R. In addition, even if the listener 2000 moves within the
range of the area L + R but moves closer to the area L on the left side, the Rch sound can be
heard smaller than the sound of the Lch, and the right area R When you move to a part close to,
Lch sounds can be heard smaller than Rch sounds. This is the same phenomenon as in the case of
obtaining stereo feeling using the Lch and Rch speakers, so the listener 2000 moves while
listening to the sound from the speaker device 1 You can get a sense of stereo with less
discomfort.
[0034]
In this example, the Lch radiation area LA is shaped so as to extend in a symmetrical manner
with respect to a line extending in the normal direction (front direction of the speaker device 1)
from the Lch virtual focus LG. This is realized by providing the Lch virtual focus LG behind the
central portion of the Lch front region LP. The same applies to the Rch radiation area RA.
Furthermore, the Lch radiation area LA and the Rch radiation area RA are in a symmetrical
relationship with respect to a line extending in the normal direction of the front surface 100F
from the midpoint between the Lch virtual focus LG and the Rch virtual focus RG. This means
that the Lch front region LP and the Rch front region RP have the same size, and extend in the
normal direction of the front 100F from the midpoint between the central portion of the Lch
front region LP and the central portion of the Rch front region RP. This is realized by the fact that
the Lch virtual focus LG and the Rch virtual focus RG are in a symmetrical relationship with
respect to the line. In such a relationship, the listener 2000 can obtain particularly good stereo
feeling.
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[0035]
The distance from the Lch front area LP to the Lch virtual focus LG may be set according to the
size (spreading angle) of the Lch emission area LA, and may be shorter as the Lch emission area
LA is wider. However, if the distance from Lch front region LP of Lch virtual focus LG is too
short, the sound quality may deteriorate, and if it is too long, the spread of Lch radiation region
LA becomes too small. It should be controlled within. Therefore, the predetermined range may be
determined to be a range farther from Lch front region LP as the size of Lch front region LP is
larger. That is, the spread angle of the Lch radiation area LA may be controlled within a
predetermined range. The same applies to the Rch virtual focus RG, but the distance from the Lch
virtual focus LG to the Lch front region LP and the distance from the Rch virtual focus RG to the
Rch front region RP may not be the same. That is, the above-mentioned symmetrical relationship
is for obtaining particularly good stereo feeling, and the constitution may not necessarily satisfy
the above-mentioned relationship as long as the stereo feeling with little incongruity can be
obtained.
[0036]
[Contrast to Conventional Method] Subsequently, in the speaker device 1, all the speaker units
20-1, 20-2,... 20-14 of the speaker array unit 2 are used to emit radiation sound and audio based
on the audio data L The case of outputting each of the radiation sounds based on the data R will
be described as a conventional example with reference to FIG.
[0037]
FIG. 5 is a diagram for explaining the reach of the radiation sound in the conventional example.
The Lch virtual focus LG, the Rch virtual focus RG, and the virtual inter-focal distance SW shown
in FIG. 5 are assumed to be the same parameters as in the case shown in FIG. As shown in FIG.
5A, the sound based on the audio data L and the sound based on the audio data R are output
from all of the speaker units 20-1, 20-2,. That is, the Lch front area LP and the Rch front area RP
coincide with each other.
[0038]
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Therefore, the Lch radiation area LA and the Rch radiation area RA are different from the case
shown in FIG. That is, as shown in FIG. 5B, the Lch radiation area LA is a range extending to the
right of the listener 2000 as compared to the case shown in FIG. 4, and the Rch radiation area RA
is more listener than in the case shown in FIG. It is a range that spreads to the left of 2000.
Therefore, when the listener 2000 moves to the left, unlike in the case shown in FIG. 4, the Lch
sound can be heard smaller than the Rch sound, and when it moves further, the Rch sound will
be listened strongly become. That is, since it is a phenomenon different from the case of
obtaining stereo feeling using the Lch and Rch speakers, the listener 2000 feels discomfort when
moving when listening to the sound from the speaker device 1 .
[0039]
As described above, the listener 2000 listens to the sound from all of the speaker units 20-1, 202,... 20-14 constituting the speaker array unit 2 and does not feel much stereo feeling. Not only
that, you will feel discomfort due to the difference between the moving direction and the sound
to be heard strongly. On the other hand, as described above, the listener 2000 moves due to the
emission sound being output with the Lch front area LP and the Rch front area RP being different
areas by the first signal processing in the embodiment of the present invention. Even then, you
will get a stereo feeling with less discomfort.
[0040]
Although the embodiments of the present invention have been described above, the present
invention can be implemented in various aspects as follows. [Modification 1] In the embodiment
described above, the Lch virtual focus LG is set on the rear side of the housing 100 at the central
part of the Lch front area LP which is a part of the front surface 100F. It may be at any position.
The same applies to the Rch virtual focus RG. In this example, a case where the virtual focal
distance SW is short as compared with the case in the embodiment will be described in
comparison with the conventional example with reference to FIG.
[0041]
FIG. 6 is a diagram for explaining the reach of radiated sound according to the first modification
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of the present invention and the conventional example. FIG. 6 (a) is a view for explaining the
arrival range of the radiation sound in the modification 1 of the present invention, and FIG. 6 (b)
is a view for explaining the arrival range of the radiation sound in the conventional example. In
the case of the first modification, the range L + R where stereo sense can be obtained is narrowed
due to the shortening of the virtual focal distance SW, while the range of the region L + R is
wider in the case of the conventional example. On the other hand, as described above, in the first
modification, the sound based on the audio data L and the sound based on the audio data R are
output from the separated region, while in the conventional example, each speaker unit 20-1 202, ... 20-14. Therefore, in the conventional example, even if the region L + R is expanded, the
virtual focal distance SW is shortened, which makes it further difficult to obtain a sense of stereo,
but in the first modification, the sound based on the audio data L is It is rare that the sense of
direction of the sound based on the audio data R is maintained and the sense of stereo can not be
obtained.
[0042]
[Modification 2] Following Modification 1, the case where the virtual focal distance SW is longer
than that in the embodiment will be described in comparison with the conventional example with
reference to FIG.
[0043]
FIG. 7 is a diagram for explaining the reach of the emitted sound with respect to the second
modification of the present invention and the conventional example.
FIG. 7A is a view for explaining the arrival range of the radiation sound in the modification 2 of
the present invention, and FIG. 7B is a view for explaining the arrival range of the radiation
sound in the conventional example. In the case of the conventional example, by expanding the
virtual inter-focal distance SW, the range of the region L and the region R where the stereo
feeling can not be obtained is only expanded, and stereo feeling is obtained from the state before
the virtual inter-focus distance SW There is no factor to improve. In the case of the second
modification, when the listener 2000 moves away from the speaker device 1, the state when the
listener 2000 moves to the left side or the right side is similar to that of the conventional
example (for example, it moves to the left side) Nevertheless, if the listener 2000 is close to the
speaker device 1, such a phenomenon does not occur and the relationship is the same as in the
embodiment. As described above, when the listener 2000 is close to the speaker device 1, the
sense of separation of the sound image of the listener 2000 is enhanced by the increase of the
virtual inter-focal distance SW, so that a more stereo feeling can be obtained.
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[0044]
[Modification 3] In the embodiment described above, the Lch virtual focus LG is set on the rear
side of the chassis 100 at the center of the Lch front area LP which is a part of the front surface
100F. The Rch virtual focus position RG may be moved in the same direction. At this time, the
virtual inter-focal distance SW may be kept constant. As described above, control for moving the
Lch virtual focus LG and the Rch virtual focus position RG may be performed according to an
instruction from the user input to the operation unit 5. Hereinafter, the case where Lch virtual
focus LG and Rch virtual focus position RG are moved to the left side (the direction of arrow AR2)
while keeping virtual inter-focus distance SW constant will be described in comparison with the
conventional example using FIG. .
[0045]
FIG. 8 is a diagram for explaining the arrival range of the emitted sound with respect to the third
modification of the present invention and the conventional example. In the third modification, the
area L + R moves to the right (AR3 direction) as a whole compared to before moving the Lch
virtual focus LG and the Rch virtual focus position RG, but the relative positions of the area L, the
area R, and the area L + R Positional relationship does not change. Therefore, in the case of the
third modification, the same effect as in the embodiment can be obtained. Also in the case of the
conventional example, the relative positional relationship between the area L, the area R, and the
area L + R does not change compared to before moving the Lch virtual focus LG and the Rch
virtual focus position RG. Therefore, in the case of the conventional example, the stereo feeling is
not improved.
[0046]
[Modification 4] In the embodiment described above, the Lch front area LP and the Rch front
area RP are configured not to overlap, but a part may be configured to overlap.
[0047]
FIG. 9 is a diagram for explaining the reach of the radiation sound and the virtual focal position
in the fourth modification of the present invention.
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As shown in FIG. 9, in this example, the Lch front region LP is defined as a region including the
speaker units 20-1, 20-2,... 20-8, and the Rch front region RP is a speaker unit 20. It is defined as
an area including -7, 20-8, ... 20-14. That is, the ranges in which the speaker units 20-7 and 20-8
are provided overlap. In this case, the central portion of the Lch front surface area LP
substantially corresponds to a portion between the speaker units 20-4 and 20-5. In order to
obtain a good stereo feeling, it is preferable to make the left and right sound emission areas
symmetrical as in the embodiment, so the Lch virtual focus LG is set on the rear side of the
casing 100 of this part. The central portion of the Rch front surface region RP is generally a
portion between the speaker units 20-10 and 20-11. By doing this, the Lch radiation area LA and
the Rch radiation area RA are expanded and the virtual inter-focal distance SW is shortened
compared to the case of the embodiment.
[0048]
[Modification 5] In the embodiment described above, a speaker unit which is not included in
either of the Lch front area LP and the Rch front area RP is not present, but may be present.
[0049]
FIG. 10 is a diagram for explaining the reach of the radiation sound and the virtual focal position
in the fifth modification of the present invention.
As shown in FIG. 10, in this example, the Lch front area LP is defined as an area including the
speaker units 20-1, 20-2, ... 20-6, and the Rch front area RP is a speaker unit 20. It is defined as a
region including −9, 20-10,. That is, the speaker units 20-7 and 20-8 are present in the range
not included in the Lch front surface area LP and the Rch front surface area RP, and do not
output the sound based on the audio data L and R. In this case, the central portion of the Lch
front surface area LP substantially corresponds to a portion between the speaker units 20-3 and
20-4. Therefore, the Lch virtual focus LG is set on the rear side of the casing 100 of this part. The
central portion of the Rch front surface region RP is generally a portion between the speaker
units 20-11 and 20-12. By doing this, the Lch radiation area LA and the Rch radiation area RA
become narrower and the virtual inter-focal distance SW becomes longer than in the case of the
embodiment.
[0050]
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17
The Lch front area LP is an area including the speaker unit 20-1 closest to one end side in the
longitudinal direction of the housing 100, and the Rch front area RP is the speaker unit 20
closest to the other end side of the housing 100. Although it was a field containing -14, it may be
a range which does not contain this. For example, the Lch front area LP may be an area including
the speaker units 20-2, 20-3,. As shown in the embodiment, the fourth modification, and the fifth
modification, each of the Lch front area LP and the Rch front area RP includes a plurality of
speaker units and may be different areas.
[0051]
[Modification 6] In the embodiment described above, the first signal processing is performed in
the signal processing unit 12 when the input audio data Sin is 2ch, but the number of channels is
more than that. It is also good. For example, in the case of 3ch further including Cch, the
radiation sound corresponding to Cch may be output.
[0052]
FIG. 11 is a diagram for explaining the reach of the radiation sound and the virtual focal position
in the sixth modification of the present invention. As shown in FIG. 11, in this example, a Cch
front area CP exists in addition to the Lch front area LP and the Rch front area RP. The Lch front
area LP is an area including the speaker units 20-1, 20-2,... 20-5, and the Cch front area CP is
including the speaker units 20-6, 20-7,. The area, the Rch front area RP, is an area including the
speaker units 20-10, 20-11,..., 20-14. The audio data C corresponding to Cch is controlled by the
control unit 3 so as to be input to the equalizer unit 11-C, and is output to the signal processing
unit 12-C. In the progress processing unit 12-C, the Cch virtual focal point CG is set by the
control unit 3 so as to be on the rear side of the casing 100 at the central portion of the Cch
front region CP as in the other virtual focal points. Thus, the radiation sound corresponding to
Cch is output to the Cch radiation area CA.
[0053]
In the example shown in FIG. 11, the Cch virtual focus CG is located closer to the front surface
100F than the Lch virtual focus LG and Rch virtual focus RG. This is that although the number of
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speaker units to which the sound based on the audio data C is output is small, the spread angle of
the Cch radiation area CA matches the spread angle of the Lch radiation area LA and the Rch
radiation area RA by. By matching the spread angles, the transfer characteristics from the sound
sources localized to the three virtual focal points to the listener become similar, and the listening
area without discomfort is expanded, so the effect of the present invention becomes more
remarkable. When the spread angles are not matched, the positional relationship between the
position of the Cch virtual focus CG and the Lch virtual focus LG and Rch virtual focus RG is not
limited to the above-described relationship.
[0054]
[Modification 7] In the embodiment described above, when the input audio data Sin is 5ch, the
second signal processing is performed in the signal processing unit 12, but a part of the
processing is performed. The first signal processing may be performed on the channel. For
example, first signal processing may be applied to FLch and FRch. That is, the speaker device 1
may output the radiation sound and the beam sound from the speaker array unit 2 in the same
period.
[0055]
FIG. 12 is a diagram for explaining the reach of the emitted sound and the virtual focal position
in the seventh modification of the present invention. In this example, the signal processing unit
12 performs first signal processing on Cch, FLch (Lch) and FRch (Rch), and performs second
signal processing on SLch and SRch. In FIG. 12, the emission sound of Lch and Rch and the beam
sound of SRch are described, and the sound of the other channels is omitted. As shown in FIG. 12,
the sound based on the audio data SR is output as a beam sound by being output from the
speaker units 20-1, 20-2,. The beam sound of this SRch is output to the area SRA and has a focal
point SRG. The directivity direction and the focal position of the beam sound are controlled by
the control unit 3 so as to reflect the wall surface of the room and the like to reach the listener.
[0056]
[Modification 8] In the embodiment described above, the plurality of speaker units 20-1, 20-2,...
20-14 constituting the speaker array unit 2 are linearly arranged in a row. However, they may be
arranged on the surface side by side in two or more rows.
03-05-2019
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[0057]
FIG. 13 is a view for explaining the arrangement of the speaker unit and the sound output
portion in the modification 8.
As shown in FIG. 13, the speaker array unit 2A includes speaker units 20A arranged in a plane in
five rows. When the speaker unit is provided as described above, the shapes of the Lch front
surface region LP and the Rch front surface region Rp are each a polygon (hexagon in this
example) as shown in FIG. It may be good or circular. The central portion of the Lch front region
LP of such a shape may be a portion of the center of gravity in general, and the Lch virtual focus
LG may be provided on the rear side of the case of this portion. The same applies to Rch.
[0058]
[Modification 9] In the embodiment described above, when the input audio data Sin is 5ch, the
second signal processing is performed in the signal processing unit 12, but the mixing processing
is appropriately performed. The number of channels may be reduced to perform the first signal
processing, or when some channels are to be subjected to the first signal processing, the
remaining channels may be subjected to the second signal. It is sufficient if the processing is
performed. Conversely, when the input audio data Sin is 2ch, the number of channels may be
increased by channel expansion processing as appropriate, and the second signal processing may
be performed in the signal processing unit 12. Also in this case, the first signal processing may
be performed on some channels.
[0059]
[Modification 10] The control program in the embodiment described above is a computer
readable recording medium such as a magnetic recording medium (magnetic tape, magnetic disk,
etc.), an optical recording medium (optical disc, etc.), a magneto-optical recording medium, a
semiconductor memory, etc. It can be provided in a stored state. Also, the speaker device 1 may
download the control program via the network.
[0060]
DESCRIPTION OF SYMBOLS 1 ... Speaker apparatus, 2, 2A ... Speaker array part, 3 ... Control part,
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4 ... Storage part, 5 ... Operation part, 6 ... Interface, 10 ... Sound processing part, 11, 11-C, 11-FL,
11- FR, 11-SL, 11-SR ... equalizer unit, 12, 12-C, 12-FL, 12-FR, 12-SL, 12-SR ... signal processing
unit, 13, 13-1, 13-2, ... · · · 13-14 ... addition unit, 14, 14-1, 14-2, ... 14-14 ... D / A unit, 15, 15-1,
15-2, ... 15-14 ... amplification unit , 20-1, 20-2, ..., 20-14, 20A ... speaker unit, 2000 ... listener
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