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JP2007134939

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2007134939
A sound image center position can be set at a desired position in an opening area of a frame.
SOLUTION: Eight speaker units SP0 to SP32 are attached to each of hollow members 1a to 1d
constituting each side of a square frame so as to face an opening area. The sound image center
position 21 set at the opening in the frame is set. The speaker units SP2 and SP21 opposed at the
y-coordinate position (y = 2) of the sound image center position 15 and the speaker units SP13
and SP26 opposed at the x-coordinate position (x = 5) are selectively driven. A sound image can
be created at the sound image center position 15 by controlling the gain of the drive signal input
to the pair of opposing speaker units. [Selected figure] Figure 5
Speaker apparatus and video display apparatus
[0001]
The present invention relates to a loudspeaker apparatus adapted to localize a sound image at a
desired position, and an image display apparatus using the loudspeaker apparatus for audio
reproduction.
[0002]
With the development of home theaters, playback and viewing of images on a large screen is
becoming widespread.
There is a demand for audio reproduction to be of higher quality and more realistic, as well as
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reproduction of a large screen image.
[0003]
FIG. 22 shows a speaker panel in which a large number of speaker units SP 0, SP 2, SP 3,..., SP n
are two-dimensionally arranged as described in Patent Document 1 below. In Patent Document 1,
each speaker unit is housed in a separate cabinet, and a speaker panel is installed behind the
screen of the projector.
[0004]
JP, 2004-193811, A
[0005]
In addition, as a method of generating a sound image at a position where a speaker sound source
does not exist, an array speaker as described in Patent Document 2 below has been proposed.
[0006]
JP, 2004-172661, A
[0007]
Since the speaker unit as described in Patent Document 1 is arranged in a two-dimensional
manner, and the panel-like speaker device as a whole is in the shape of a thin panel, the presence
of the speaker can be improved compared to the box type speaker. It can be made relatively
small.
Then, by selectively driving the speaker, the sound image can be localized at a desired position
two-dimensionally.
For example, if only one speaker unit is driven, the sound image can be localized at one point on
the screen.
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However, the number of speaker units has increased, and there has been a problem that the scale
of the circuit configuration of the amplifier, the signal processing unit, etc. has been increased
and the power consumption has been increased.
[0008]
In addition, when a beam-like directional characteristic is formed by an array speaker, the sound
image can be narrowed, but if the user is not positioned on the extension of the beam, the effect
of producing the sound image can not be obtained. was there. That is, there is a problem that the
listening position which can receive the effect is limited.
[0009]
Therefore, an object of the present invention is to provide a speaker device and an image display
device in which the problem due to the increase in the number of speaker units is relatively small
and the restriction on the listening position is not severe.
[0010]
In order to solve the problems described above, according to the present invention, a plurality of
speaker units are attached to the frame so that each main axis faces the opening area of the
frame, and a setting to create a sound image in the plurality of speaker units It is a speaker
apparatus by which at least a pair of speaker units connected so as to pass through a position are
selectively driven.
[0011]
As one form, the frame is a substantially rectangular frame, and a plurality of speaker units are
provided side by side so that the radiation direction faces the opposite side in the hollow member
constituting each side of the frame, and the setting position is A speaker device is provided in
which two pairs of opposing speaker units positioned on a passing x-direction and a y-direction
line orthogonal to the x-direction are selectively driven.
[0012]
Further, in the present invention, a frame is provided so as to surround the periphery of the
image observation unit, and a plurality of speaker units are attached to the frame so that each
main axis faces the image observation unit of the frame. In the image displayed on the unit, the
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set position where the sound image is to be created is defined, and among the plurality of
speaker units, the image display in which at least one pair of speaker units connected so as to
pass the set position is selectively driven. It is an apparatus.
[0013]
According to the present invention, a sound image can be created at a desired position of the
opening of the frame.
In this invention, since the front axis of the speaker unit is not directly directed to the user, the
direct emission of the high-frequency portion important for the sense of localization can not be
directed to the user, thereby reducing the feeling of sound being generated from the speaker
unit. A sound image can be created at a set position within the opening of the frame.
Further, since the speaker unit can not be seen visually by the user, it is possible to reduce the
feeling that sound is generated from the speaker unit visually.
Furthermore, since the speaker unit is not provided at the opening of the frame, the number of
units can be reduced, the circuit scale can be reduced, and power consumption can be reduced.
[0014]
Hereinafter, an embodiment of the present invention will be described with reference to the
drawings.
FIG. 1 is a perspective view and a partial cross-sectional view of the entire speaker device
according to one embodiment. FIG. 2 is a perspective view showing the whole of the speaker
device according to the embodiment and expressing an internal speaker unit.
[0015]
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In one embodiment, each of the hollow members 1a, 1b, 1c and 1d constituting each side of a
substantially rectangular frame, for example, a square frame with one side of 70 cm, has a
plurality of, for example, eight apertures per side. The speaker units are mounted such that their
main axes face the opening area of the frame. Speaker units provided in the hollow member 1a
are denoted as SP0 to SP7, speaker units provided in the hollow member 1b are denoted as SP8
to SP15, and speaker units provided in the hollow member 1c are denoted as SP16 to SP23. The
speaker units provided in the hollow member 1d are denoted as SP24 to SP31. These speaker
units SP0 to SP31 have the same characteristics. However, in order to obtain desired
reproduction characteristics, the characteristics of the speaker unit may be made different
depending on the installation position or the like.
[0016]
FIG. 1B shows a cross section in the case where the hollow member 1a is horizontally cut at a
position shown by an alternate long and short dash line in FIG. 1A. As shown in FIGS. 1B and 3,
the hollow members 1 a to 1 d have a trapezoidal shape in which the width gradually narrows
toward the opening of the frame, and each speaker unit is attached to the opening formed on the
upper side of the trapezoid It is done. That is, the speaker units on each side are attached side by
side so that the radiation direction is directed to the opposite side.
[0017]
The hollow members 1a to 1d are not partitioned inside, the end faces of the sides are closed, the
hollow members corresponding to the sides are modules, and the modules are connected to each
other to assemble the speaker device. However, mounting holes or the like may be provided on
the end face, and a partition may be provided for each appropriate number of speaker units. The
hollow members 1a to 1d are made of synthetic resin molded products, processed wood
products, and the like.
[0018]
Although omitted in FIGS. 1 and 2, the decorative cloth 2 is attached so as to cover the front
surfaces of the speaker units SP0 to SP31 attached to the hollow members. The color and texture
of the decorative cloth 2 are preferably selected to such an extent that they can not be visually
distinguished from the surfaces of the hollow members 1a to 1d.
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[0019]
The type, number, and the like of the speaker units to be used are not limited to the one
embodiment. As a speaker unit, not only a dynamic speaker but a horn speaker, a capacitor
speaker, etc. may be used, and the frame shape may be rectangular. The inner opening of the
frame shape is not limited to the open one, and a display unit such as a screen or glass may be
disposed and closed as in an application example described later. Furthermore, the cross section
of the hollow member does not have to be trapezoidal, and the cross sectional shape may be
rectangular. The hollow member may be triangular in cross section, and the speaker unit may be
attached to the opening formed on one side.
[0020]
FIG. 3 illustrates a method of localizing a sound image at a desired position between two
speakers, using the two speakers as an example. Such an operation is called panning or bun pot.
For example, the speakers SPL and SPR whose speaker units are housed in a cabinet are provided
separately to the left and right. The left channel signal Lch from the sound source 11 is input to
the speaker SPL via the gain adjustment unit 12L and the amplifier 13L, and the right channel
signal Rch is input to the speaker SPR via the gain adjustment unit 12R and the amplifier 13R.
[0021]
FIG. 4A varies the gain GL (solid line) of the gain adjustment unit 12L and the gain GR (broken
line) of the gain adjustment unit 12R to control the level relationship of the signals input to the
speakers SPL and SPR to a desired position. It is an example of localizing a sound image. As
shown on the vertical axis of FIG. 4A, the gains GL and GR can be made to have values in the
range of 0 to 1. The horizontal axis in FIG. 4A indicates the listening position in front of the
speakers SPL and SPR, L is the front position of the speaker SPL, C is the center position, and R is
the front position of the speaker SPR. As shown in FIG. 4A, when the gain GL is decreased from 1
to 0 with a constant slope and the gain GR is increased from 0 to 1 with a constant slope, the
position of the sound image is changed from L → C → R. Can.
[0022]
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As shown in FIG. 4B, when the gain GR is changed from 0 to 1 while holding the gain GL at 1, the
sound image position can be changed from L to C, and the gain GL is held while holding the gain
GR at 1. By changing from 1 to 0, the sound image position can be changed from C to R.
Furthermore, as shown in FIG. 4C, even if the gains GL and GR are changed in a curved manner,
the sound image position can be changed as L → C → R.
[0023]
The method of sound image position control using the two-channel speaker described above is
extended to the speaker apparatus shown in FIGS. 1 and 2. That is, by using the speaker units
SP0 to SP31 attached to the frame-shaped hollow members 1a to 1d, the sound image is
localized at a desired position of the opening in the frame. In the present invention, among the
plurality of speaker units SP0 to SP31, at least a pair of speaker units configured to pass through
the set position where the sound image is to be generated is selectively driven. In one
embodiment, among the hollow members of the four sides forming the frame, one pair of speaker
units attached to the two opposite sides and facing each other and the other two opposing sides
are connected to each other. Form a sound image at the position of the opening in the frame
using a pair of facing speaker units.
[0024]
As shown in FIG. 5, the sound image center position set in the frame is indicated by reference
numeral 21. The sound image center position 21 can be set on a two-dimensional coordinate
determined by the number of speaker units. In general, assuming that the number of opposing
speaker units on two sides is m and n, respectively, coordinates (x, y) (x = 0, 1, 2, ..., m-1) on a
two-dimensional plane (Y = 0, 1, 2,..., N-1) are set. In one embodiment, (m = 8, n = 8), and the
sound image center position can be set on the (8 × 8) coordinates.
[0025]
In the example shown in FIG. 5, the sound image center position 15 is set to (x = 5, y = 2). The
speaker units SP2 and SP21 opposed at the y-coordinate position (y = 2) of the sound image
center position 15 and the speaker units SP13 and SP26 opposed at the x-coordinate position (x
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= 5) are selectively driven. A sound image can be produced at the sound image center position 15
by controlling the gain of the drive signal input to the pair of opposing speaker units as
described with reference to FIG.
[0026]
For example, when using complementary and linear gain control as shown in FIG. 4A, the gain G2
of the input signal to the speaker unit SP2 and the gain G21 of the input signal to the speaker
unit SP21 (G2 = 5/7, G2 is set to 2/7). The gain G26 of the input signal to the speaker unit SP26
and the gain G13 of the input signal to the speaker unit SP13 are set to (G26 = 5/7, G13 = 2/7).
Thus, the coordinate position is defined in the frame-like opening formed by the central members
1a to 1d according to the number and position of the speaker units, and in the x direction
orthogonal to the sound image center position 15 of the desired coordinate position. Two sets of
speaker units SPa, SPb, SPc, and SPd located at both ends of the line and the line in the y
direction are selectively driven, and further, the sound image center with respect to the drive
signal of the selected speaker unit SPa to SPd A desired sound image center position 15 can be
set by multiplying the gain controlled according to the x coordinate and the y coordinate of the
position 15.
[0027]
FIG. 6 shows a first example of the configuration of the drive unit in the embodiment. For
example, an analog audio signal obtained by converting a digital audio signal from a playback
device such as a CD (compact disc) player or an MD (mini disc) player is output from the sound
source 21. The analog audio signal is divided into four signal paths, which are respectively
supplied to the gain adjustment units 22a, 22b, 22c and 22d. The gain adjusting units 22a and
22b are groups of speaker units facing each other in the x direction, that is, gain for each of the
speaker units SP0 to SP7 attached to the central member 1a and the speaker units SP16 to SP23
attached to the central member 1c. Adjust the The gain adjusting units 22c and 22d are gains for
the groups of speaker units opposed in the y direction, that is, the speaker units SP8 to SP15
attached to the central member 1b and the speaker units SP24 to SP31 attached to the central
member 1d. Adjust the
[0028]
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8
The output signals of the gain adjusting units 22a to 22d are supplied to the speaker selection
switches 24a, 24b, 24c, and 24d via the amplifiers 23a to 23d, respectively. The speaker
selection switches 24a to 24d selectively supply drive signals to one speaker unit from a group
of speaker units attached to each side (each center member). Drive signals Sa, Sb, Sc, and Sd for
the speaker units SPa, SPb, SPc, and SPd are output from the speaker selection switches 24a to
24d, respectively. In the example of FIG. 5, the speaker unit SPa is SP2, SPb is SP21, SPc is SP26,
and SPd is SP13.
[0029]
A control signal CT corresponding to the coordinates of the sound image center position is
generated by the position specification controller 25. The configuration of the position
designation controller 25 corresponds to an application to be described later. When the sound
image center position is set to the position intended by the user, the control signal CT is formed
corresponding to the setting operation. Also, the control signal CT may be automatically
generated so as to set the sound image center position in conjunction with the image reproduced
on the screen. The control signal CT is, for example, in the form of a digital signal of several bits
so that the x and y coordinates of the sound image center position can be defined.
[0030]
The gain of each of the gain adjusting units 22 a to 22 d is set by the control signal CT from the
position designation controller 25. The gains with respect to the group of speaker units opposed
in the x direction are adjusted by the gain adjusting units 22a and 22b, and the gains with
respect to the group of speaker units opposed in the y direction are adjusted by the gain
adjusting units 22c and 22d.
[0031]
In addition, the selection state of each of the speaker selection switches 24 a to 24 d is controlled
by the control signal CT from the position designation controller 25. The speaker selection
switches 24a and 24b select a pair of speaker units SPa and SPb facing in the x direction, and the
speaker selection switches 24c and 24d select a pair of speaker units SPc and SPd facing in the y
direction.
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[0032]
As described above, the gain of the gain adjusting units 22a to 22d and the selection state of the
speaker selection switches 24a to 24d are controlled by the control signal CT, and a sound image
can be generated at a desired position in the frame. In addition, it is also possible to reverse the
order of processing of speaker selection and gain adjustment.
[0033]
FIG. 7 shows a second example of the configuration of the drive unit. The second example is a
configuration in which the gain adjustment units 22a to 22d in FIG. 6 are omitted. An audio
signal from the sound source 21 is supplied to the parallel / serial connection unit 27 through
the common amplifier 26. The parallel / serial connection unit 27 reduces the number of signal
lines to be switched by the speaker selection switches 24 a to 24 d using the fact that the pair of
speaker units is driven with the same power.
[0034]
As shown in FIG. 7, by setting the drive signal to the same level and selecting the driven speaker,
it is possible to create a sound image at a desired sound image center position.
[0035]
FIG. 5 shows an example in which a sound image is created at one sound image center position
15, but it is also possible to create sound images at a plurality of sound image center positions at
the same time.
For example, in the case of creating a sound image at five sound image center positions, the
configuration shown in FIG. 8 is provided to supply drive signals to the speaker units SP0 to
SP31. In FIG. 8, AD0 to AD31 indicate addition circuits, AP0 to AP31 indicate amplifiers, and
output signals of the amplifiers AP0 to AP31 are supplied to the speaker units SP0 to SP31. The
five sound image center positions may be aligned on the same line in the x direction or the y
direction, so that five audio signals can be input to the addition circuits AD0 to AD31.
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[0036]
FIG. 9 shows the configuration of the signal processing unit in the case of setting five sound
image center positions. Signal processing units PR1, PR2, PR3, PR4, and PR5 are provided
corresponding to the respective sound image center positions. These signal processing units PR1
to PR5 have the same configuration as each other, and have the same configuration as that of
FIG. 6 described above.
[0037]
That is, in the signal processing unit PR1, the audio signal from the first sound source 211 is
supplied to the speaker selection stage 241 having four speaker selection switches via the gain
adjustment stage 221 having four gain adjustment sections. Ru. An amplifier is inserted into each
of the four signal paths as required. The control signal CT1 from the position controller 251 is
supplied to the gain adjustment unit of the gain adjustment stage 221 and the speaker selection
switch of the speaker selection stage 241. The control signal CT1 is a signal that defines the first
sound image center position. Output audio signals Sa1, Sb1, Sc1, and Sd1 for producing the first
sound image at the first sound image center position are extracted from the speaker selection
switches of the speaker selection stage 241.
[0038]
Output audio signals Sa1 and Sb1 are respectively supplied to a pair of speaker units facing each
other in the x direction passing the first sound image center position, and output audio signals
Sc1 and Sd1 are sent in the y direction passing the first sound image center position It is
respectively supplied to a pair of opposing speaker units.
[0039]
Similar to the signal processing unit PR1, the signal processing unit PR2 having the sound source
212, the gain adjustment stage 222, the speaker selection stage 242, and the position controller
252 outputs an audio signal Sa2 for producing a sound image at the second sound image center
position. .About.Sd2 are generated and respectively supplied to two sets (four) of speaker units.
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Further, the signal processing units PR3, PR4, and PR5 respectively form output audio signals for
producing a sound image at the third, fourth, and fifth sound image center positions.
[0040]
A sound image can be created at each of a plurality of sound image center positions by the signal
processing unit having the configuration shown in FIG. 9 described above. FIG. 10 shows another
configuration of the signal processing unit for producing a plurality of sound images.
[0041]
The audio signal of each channel from the multi-channel source 31 capable of outputting a
plurality of sound sources independently is input to each mixer of the mixer group 32. The mixer
group 32 has, for example, 32 mixers in number corresponding to the number of speaker units.
The output signals of the mixers of the mixer group 32 are input to the 32 amplifiers of the
amplifier group 33, respectively. The output audio signals of the respective amplifiers of the
amplifier group 33 are respectively supplied to the speaker units SP0 to SP31.
[0042]
Assuming that the mixers 32 each include, for example, five channels of audio signals A1, A2, A3,
A4, and A5, and mixing ratios m1, m2, m3, m4, and m5, mixed signals represented by the
following equation Output Sout.
[0043]
Sout = m1A1 + m2A2 + m3A3 + m4A4 + m5A5
[0044]
The mixing ratios m1 to m5 of the respective mixers are controlled by a mixer control signal
Cmix generated by a position controller (not shown).
The mixer control signal Cmix can control the mixing ratio of each mixer separately.
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For example, it includes control signals of 32 mixing ratios corresponding to 32 mixers. As the
mixing ratio m1 to m5, a value of 0 can be taken. For example, in the case of a mixer connected
to a speaker unit that does not contribute to producing a sound image, the mixing ratios m1 to
m5 are all zero. That is, the mixer group 32 has not only a function as a gain adjustment unit but
also a function as a mixer selection switch.
[0045]
A sound image can be created at the desired position of the opening of the frame using the
frame-shaped loudspeaker device described above, and the sound from the loudspeaker unit is
compared to the conventional configuration in which the front axis of the loudspeaker is directed
directly to the listener The feeling of being generated can be reduced. In particular, by not
directing the direct radiation in the high region, which is important for the sense of localization,
to the viewer, it is possible to weaken the sense that the sound is emitted from the speaker unit,
and effect at the position set by the two opposing speaker units. Sound image can be produced.
[0046]
In addition, since the speaker unit can be installed at a location where it is difficult for the user to
see, localization of sound in the speaker unit can be reduced visually, and a sound image can be
effectively created at the set position. These advantages according to the invention are better
understood by the several applications described below.
[0047]
The first application example shown in FIG. 11 is an application of the present invention to a
large screen television receiver 41. The present invention can be applied to a rear projection type
display device, that is, a so-called rear professional type projector as well as a television receiver.
The frame-shaped speaker apparatus SP (see FIGS. 1 and 2) described above is attached so as to
surround the periphery of the display unit 42 on the front surface of the television receiver 41.
As shown in FIG. 12, the speaker apparatus SP may be configured to be attachable to and
detachable from the television receiver 41.
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[0048]
The position control signal is generated by estimating the position of the sound source from a
stereo two-channel audio signal or multi-channel audio signal attached to the image displayed on
the display unit 42, and the speaker is generated by the position control signal. The gain of the
drive signal and the speaker selection for the speaker units that make up the device SP are
controlled. As a result, a sound image can be created at a position corresponding to the position
of the sound source in the video, and the user can enjoy realistic reproduction. Also, if video
software having metadata indicating the position of the sound source is created in advance, the
position control signal can be obtained from the metadata. For example, in the format of Moving
Picture Experts Group (MPEG) -4 AVC (or H.264) coding, which is one of moving picture coding
methods, metadata is defined.
[0049]
FIG. 13 shows an example in which the screen 43 is attached to the opening in the frame of the
speaker device SP, and the projector 44 projects an image. The screen 43 is shown as a rear
projection type, but may be a reflection type. The position control signal corresponding to the
position of the sound source of the image projected on the screen 43 is generated from the
metadata or estimated from the multi-channel audio signal, and the drive signal to the speaker
unit constituting the speaker device SP is Gain and speaker selection are controlled. As a result of
control, a sound image is produced according to the position of the sound source.
[0050]
FIG. 14 shows an example in which a movie screen 45 used for business use is provided in the
opening of the frame-shaped speaker apparatus SP, and a video such as a live video of a concert
is displayed on the screen 45 by the projector 46. Since a plurality of performers 47a, 47b and
47c are displayed, a position control signal is generated from the information of each performer's
position, and the gain and drive signal of the drive signal for the speaker unit constituting the
speaker apparatus SP are generated by the position control signal. The selection is controlled,
and the sound image of the performance that each player is in charge of is produced so as to
substantially match the position of the player. As one example, the position of the performer in
performance is assumed to be in accordance with the position information created in advance,
and the position control signal can be generated using this position information.
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[0051]
FIG. 15 shows an example in which the present invention is applied to a desktop personal
computer. The frame-shaped speaker device SP is attached around the display surface of the
liquid crystal display 48. Reference numeral 49 denotes a computer body, and reference numeral
50 denotes a keyboard. When the application is operated by the personal computer, the display
position of the application is read via the OS (Operating System), and a sound image is produced
at the read position.
[0052]
In particular, when a plurality of applications are activated and a plurality of windows are
simultaneously displayed on the display 48 and sound is generated independently from each
application, the sound image is separated by making the sound image position correspond to
each window. Work on the personal computer can be performed efficiently. For example, since
the position where the warning sound is generated at the time of operation is generated
corresponding to the window of the application being operated, operability can be improved.
[0053]
FIG. 16 shows an example in which the present invention is applied to a mobile device 51 such as
a PDA (Personal Digital Assistants) or a portable navigation device. The frame-shaped speaker
device SP is attached around the display 52 of the mobile device 51. A sound image is created for
each major location of the map displayed on the display 52. Then, a sound image is created at the
main location in close proximity to your position moving on the displayed map. Preferably,
different sound sources are used for each major location. The feeling of operation of the mobile
device 51 and the visibility of the display 52 can be improved.
[0054]
FIG. 17 shows an example in which the present invention is applied to an electronic book device
53. As shown in FIG. The electronic book device 53 is not limited to a dedicated device, and may
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15
be a device having an electronic book function as one of PDA functions. A frame-shaped speaker
SP is attached around the display 54 of the electronic book device 53. One of the operation
modes of the electronic book device 53 is an automatic reading function in which a voice reading
a displayed book is uttered. In the automatic reading function, since the reading speed is fixed,
the position control signal can be generated in response to the change of the reading position. By
controlling the gain of the drive signal to the speaker unit and the speaker selection by the
position control signal, it is possible to change the position of the audio in synchronization with
the currently read position. In this way, the position of the character being read out matches the
position of the sound image, so that the reading efficiency is improved, and since the position
currently being read by the user can be recognized immediately, the user's fatigue can be
reduced. .
[0055]
In FIG. 18, the printed matter 55 such as a picture book, picture-story show, photo album, etc. is
arranged in the frame of the frame-shaped speaker apparatus SP, and voices of commentary of
the printed matter 55 are generated at positions corresponding to the arrangement of printed
contents This is an example in which a sound corresponding to the content of a photo is
generated at a position where the photo is pasted. When the voice or the like of the commentary
of the picture book as the printed matter 55 is given to the child, it can be expected that the
child's understanding becomes faster. You can also enjoy watching the photo album.
[0056]
FIG. 19 shows an example in which the present invention is applied to a dangerous substance
detector 56 installed at an airport or the like. A frame-shaped speaker device SP is attached to a
gate through which a person of the dangerous substance detector 56 passes. The dangerous
goods detector 56 can detect the position 57 when a person passing through is wearing
dangerous goods such as metal objects. A position control signal is generated based on the
detection of the dangerous substance, and the position control signal controls the gain of the
signal for driving the speaker unit of the speaker apparatus SP and the speaker selection. As a
result, when a dangerous substance is detected, not only the alarm sounds but also the alarm
sound is heard from the position 57 of the dangerous substance, which makes it easy to identify
the dangerous substance. This invention can be applied to the shoplifting prevention gate as well
as the dangerous goods detector 56.
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[0057]
FIG. 20 shows an example in which the present invention is applied to a table type electronic
game apparatus 58. This game apparatus 58 displays, for example, an air hockey game screen by
computer graphics on a display 59, and two players opposing each other across the display 59
virtually pack the opponent's goal on the display screen of the display 59. Provide a game that
competes to drive 60. The frame-shaped speaker SP is attached around the display 59. Then, by
generating a sound whose position changes according to the change of the position of the pack
60, for example, a sound when the pack is hit by the speaker device SP, it is possible to feel that
the whistle is also actually hitting the pack, It can improve the realism of the game.
[0058]
FIG. 21 shows an example in which the present invention is applied to a window 61 for viewing a
landscape such as a viewing platform, a sightseeing spot or the like. It is possible to view the
outside through the window glass 62. A frame-shaped speaker apparatus SP is attached to the
inside of the window along the frame of the window as a speaker for generating an audio of
commentary of the scenery. It is done to create a sound image of the commentary audio at the
position of the currently described object (indicated by the arrow). A person listening to the
commentary voice can easily identify the subject of the commentary.
[0059]
The present invention is not limited to the embodiments of the present invention described
above, and various modifications and applications are possible without departing from the scope
of the present invention. For example, the shape of the frame may be a polygon, a circle, or an
ellipse. Further, the sound image center position is not limited to a point, but may be a partial
area. In this case, the plurality of speaker units are opposed to each other and driven. That is, the
sound image created is larger. Although the speaker units are arranged in one row with respect
to the hollow members on each side, two or more rows may be arranged in parallel. Furthermore,
in the circuit configuration of the drive unit described in the embodiment of the present
invention, part or all of the processing may be realized by software processing of a computer. For
example, the mixer group 32 in the configuration of FIG. 10 can be realized by a personal
computer, a DSP (Digital Signal Processor) or the like.
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[0060]
It is the perspective view and partial cross section of the whole of the speaker apparatus in one
embodiment of this invention. It is the perspective view which expressed the speaker unit inside
the speaker apparatus in one embodiment of this invention. It is a block diagram showing an
example of composition for controlling a position of a sound picture by 2-channel reproduction.
It is a basic diagram for demonstrating the operation | movement which controls the position of a
sound image by 2 channel reproduction | regeneration. It is a basic diagram for demonstrating
control of the position of the sound image in one embodiment of this invention. It is a block
diagram which shows an example of the structure for producing | generating the signal which
drives the speaker apparatus in one embodiment of this invention. It is a block diagram which
shows the other example of the structure for producing | generating the signal which drives the
speaker apparatus in one embodiment of this invention. It is a block diagram showing
composition of a speaker unit part of other examples of composition for generating a signal
which drives a speaker device in a 1 embodiment of this invention. It is a block diagram which
shows the structure of the signal processing part of the further another example of the structure
for producing | generating the signal which drives the speaker apparatus in one embodiment of
this invention. It is a block diagram which shows the further another example of the structure for
producing | generating the signal which drives the speaker apparatus in one embodiment of this
invention. It is a schematic diagram used for description of the example of application which
applied this invention to the television receiver. It is a schematic diagram used for description of
the example of application which applied this invention to the television receiver. It is a
schematic diagram used for description of the application example which applied this invention
to the projector. It is a schematic diagram used for description of the application example which
applied this invention to the movie. It is a schematic diagram used for description of the
application example which applied this invention to the personal computer. It is a schematic
diagram used for description of the application example which applied this invention to the
mobile apparatus. It is a schematic diagram used for description of the example of application
which applied this invention to the electronic book apparatus. It is a basic diagram used for
explanation of the example of application which applied this invention to printed matter, such as
a picture book. It is a basic diagram used for explanation of the example of application which
applied this invention to a dangerous substance detector. It is a basic diagram used for
explanation of the example of application which applied this invention to a table type electronic
game device. It is a schematic diagram used for description of the example of application which
applied this invention to the window for scenery appreciation. It is a perspective view of an
example of the conventional speaker apparatus.
Explanation of sign
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[0061]
SP0 to SP31, SPn: speaker unit CT: position control signal AP0 to AP31: amplifier PR1 to PR5:
signal processing unit 1a to 1d: hollow member 15: sound image center position 21, 211, 212 ...
sound source 22a to 22d ... gain adjustment unit 221, 222 ... gain adjustment stage 23a to 23d ...
amplifier 24a to 24d ... speaker selection switch 241, 242 ... switch selection stage 26 ・ ・ ・
Amplifier
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