close

Вход

Забыли?

вход по аккаунту

?

JP2007129486

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2007129486
The present invention provides a voice transmitting / receiving device which can improve the
operability of the user, make the user relatively easy to notice an error in the setting position,
and can be made compact. SOLUTION: A speaker array 231 comprising a plurality of speaker
units SP disposed in the device body and arranged in the device body, and a microphone array
24 comprising the plurality of microphones 241 disposed in the device body, It is the audio |
voice signal transmission / reception apparatus 1 provided. By integrating the speaker array 231
and the microphone array 24 in this manner, the operability of the user can be improved, and the
user can relatively easily notice an error in the setting position. It becomes possible to achieve
compactness. [Selected figure] Figure 5
Audio signal transmitter and receiver
[0001]
The present invention relates to an audio signal transmitting / receiving apparatus that transmits
/ receives an audio signal to / from an audio signal transmitting / receiving apparatus of the
other party, and more particularly to an improvement in the arrangement of a speaker array and
a microphone array.
[0002]
Conventionally, an audio device provided with a speaker array in which a plurality of speaker
units are arranged has been known (see, for example, Non-Patent Document 1).
04-05-2019
1
In this audio apparatus, the directivity direction and the directivity range of the audio beam
output from the speaker array can be controlled by providing a delay time to the audio signal
input to each speaker unit. Thus, the sound beam can be output in a narrow directivity range that
covers only the position of the user, so that even when there is a person other than the user in
the sound field, only the user can listen to the sound.
[0003]
Also, an audio device provided with a microphone array in which a plurality of microphones are
arranged has been known. This audio device controls the delay time of the signal collected by
each microphone. Specifically, the audio device performs delay control of the audio signal input
to each of the microphones so as to compensate for the difference in arrival time until the voice
reaches each of the microphones from the specific directional region.
[0004]
The audio device adds and synthesizes the signals after delay control. By this additive synthesis,
the speech from the specific directional area is amplified in phase and the speech from the other
area of the specific directional area is out of phase and cancels out. This allows the audio device
to pick up sound specific to the sound from a specific directional area. By setting this particular
area as the position of the user, it is possible to pick up only the voice of the user and not pick up
noise from other areas. "Digital Sound Projector YSP-1 Catalog", published by Yamaha
Corporation, published in December 2004, page 4
[0005]
An audio signal transmission / reception system is provided by an audio device (hereinafter
referred to as a first audio device) including the above-described conventional speaker array and
an audio device (hereinafter referred to as a second audio device) including a microphone array.
When configured, hands-free voice calls can be made. That is, by directing the voice beam to the
position of the user and directing the sound collection beam, it is possible to make only the user
listen to the voice from the other party, and transmit the voice specialized to the user's voice to
the other party. be able to. However, the following problems occur in the present audio signal
transmitting and receiving system.
04-05-2019
2
[0006]
That is, in order to direct the sound beam and the sound collection beam to the position of the
user, it is necessary to input the position of the user to the first audio device and the second
audio device. In the configuration in which the user manually inputs the position using the
operation unit, it is necessary to individually set the first and second audio devices, and
operability is poor.
[0007]
In addition, when the first and second audio devices have a function of automatically detecting
the position of the user, this process is separately performed by the first and second audio
devices. For this reason, the detection positions of the first and second audio devices may be
different.
[0008]
Here, when there is a false detection at the detection position in the first audio device, the user
easily notices the false detection because the user can not listen to the voice. However, even if
the second audio device detects an error in the detected position, the collected voice is
transmitted to the voice transmitting / receiving device of the other party and emitted from the
voice transmitting / receiving device of the other party. It is hard to notice.
[0009]
Further, in the first and second audio apparatuses, since they are separately provided and
separately provided with a shared configuration, it is difficult to make the audio transmission /
reception system compact.
[0010]
In addition, if the speaker and the microphone are arranged in separate devices, the sound wrap
from the speaker to the microphone may differ depending on the installation state, so echo
cancellation processing of the sound from the speaker to the microphone may be performed
04-05-2019
3
uniformly. It was difficult.
[0011]
In order to solve the above-mentioned problems, it is possible to perform echo cancellation
effectively while the operability of the user is good, the user can notice the error of the setting
position relatively easily, and the compactness can be achieved. It is an object of the present
invention to provide a voice transmitting / receiving apparatus capable of
[0012]
In order to solve the above-mentioned subject, the following means are adopted in the present
invention.
[0013]
(1) According to the present invention, there is provided an apparatus body, a speaker array
comprising a plurality of arranged speaker units disposed in the apparatus body, and a
microphone array comprising a plurality of microphones disposed in the apparatus body. An
audio signal transmitting and receiving device comprising:
[0014]
According to the above configuration, since the speaker array and the microphone array are
provided in the same device main body, when the user performs an input operation of the
pointing position, the pointing position of the sound beam and the pointing position of the sound
collection beam Only one operation is required if they are the same.
Further, when the position of the user is automatically detected and the sound beam and the
sound collecting beam are directed to the detection position, the pointing position of the sound
collecting beam is the same as the pointing position of the sound beam.
[0015]
Therefore, false detection occurs at the position of the user directing the sound collection beam,
as compared with the prior art in which the audio device provided with the microphone array
04-05-2019
4
and the audio device provided with the speaker array are separate and individually detect the
user position. When there is, it is possible to make the user recognize this false alarm relatively
easily.
That is, since there is no possibility that the user position for directing the sound beam and the
user position for directing the sound collection beam are different from each other as in the prior
art, the voice beam from the speaker array can not be heard. It is possible to make the user
recognize that there is.
[0016]
Further, since the speaker array and the microphone array are provided in the same apparatus
main body, the shareable configuration can be shared, so that downsizing can be achieved.
[0017]
In addition, since the speaker and the microphone are disposed in the same device body, the
sound rounding state from the speaker to the microphone does not largely change regardless of
how the user installs the device body. It is possible to uniformly perform the echo cancellation
process of
This enables effective echo cancellation.
[0018]
(2) The present invention is the above audio signal transmitting and receiving device, wherein
the array direction of the speaker units and the array direction of the microphones are parallel,
and the microphone array is arranged so that the sound collecting surface and the sound
emitting surface are at right angles. And the speaker array is disposed.
[0019]
According to the above configuration, the sound collecting surface and the sound emitting
surface are disposed at right angles, and the microphone array can be arranged in the direction
in which the sound pressure of the sound from the speaker array is low.
04-05-2019
5
This makes it possible to effectively prevent acoustic coupling in which sound from the speaker
array is input to the microphone array.
[0020]
In addition, when a unidirectional microphone in which sound collection from behind is
prevented is used for the microphone array, it is prevented that the sound from the speaker array
is collected by the microphone array, and acoustic coupling is further enhanced. It becomes
possible to prevent effectively.
[0021]
(3) In the present invention, in the above audio signal transmitting and receiving device, the
device body is substantially in the form of a rectangular parallelepiped, and the speaker array is
disposed on the lower surface of the device body or toward the upper surface of the device body.
A plurality of microphone arrays are provided, and a part of the plurality of microphone arrays is
disposed toward one side of the apparatus main body side perpendicular to the arrangement
direction of the speaker units, and the remaining part is the other one. It is an audio signal
transmitting / receiving device characterized by being disposed toward the side.
[0022]
According to the above configuration, the sound emission direction of the speaker array and the
sound collection direction of the microphone array can be disposed orthogonal to each other,
and the above-described acoustic coupling can be effectively prevented.
[0023]
In addition, since a part of the microphone array is disposed toward one side of the device main
body side perpendicular to the arrangement direction of the speaker units, and the remaining
part is disposed toward the other one side, the speaker array to the microphone It is possible to
effectively cancel the sound that has entered the array by signal processing.
That is, by arranging the plurality of microphone arrays and the speaker array as described
above, it is possible to make the distances between the speaker array and the microphone arrays
arranged on both sides substantially the same.
04-05-2019
6
[0024]
For this reason, the sound that gets into the microphone arrays on both sides is almost the same.
As a result, when there is a user on only one of the microphone arrays, the sound signal picked
up by the microphone array is removed from the sound signal picked up by the microphone
array on the other side, whereby the user gets around from the speaker array. It is possible to
effectively cancel the voice signal.
[0025]
(4) In the present invention, in the audio signal transmitting and receiving device, the main body
of the device is arranged such that the arrangement direction of the speaker units and the
arrangement direction of the microphones are parallel and the sound collecting direction and the
sound emitting direction are parallel. The microphone array and the speaker array are disposed
toward the same plane side of the above.
[0026]
According to the above configuration, since the sound collection direction of the microphone
array and the sound emission direction of the speaker array are parallel, when the directivity
regions of the sound collection beam and the sound beam are made to coincide, both the sound
collection beam and the sound beam are directed. It is possible to easily adjust the installation
direction of the device main body so that the region can be effectively directed.
[0027]
(5) The present invention is characterized in that in the above audio signal transmitting and
receiving apparatus, at least two of the microphone arrays are disposed, and the microphone
arrays are disposed at substantially the same distance on both sides of the speaker unit. I
assume.
According to this configuration, since the distances between the speaker array and the
microphone arrays disposed on both sides are substantially the same, the sound that wraps
04-05-2019
7
around the microphone arrays on both sides is substantially the same.
As a result, when there is a user on only one of the microphone arrays, the sound signal picked
up by the microphone array is removed from the sound signal picked up by the microphone
array on the other side, whereby the user gets around from the speaker array. It is possible to
effectively cancel the voice signal.
[0028]
According to the present invention, since the speaker array and the microphone array are
provided in the same apparatus main body, when the user performs input operation of the
pointing position, the pointing position of the sound beam and the pointing position of the sound
collection beam Only one operation is required if they are the same.
[0029]
In addition, since there is no possibility that the user position for directing the sound beam and
the user position for directing the sound collection beam are different from each other as in the
prior art, the voice beam from the speaker array can not be listened. The user can be made aware
that
Furthermore, since the configuration that can be shared by the speaker array and the
microphone array can be shared, compactification can be achieved.
[0030]
According to the above, it is possible to provide an audio transmitting / receiving device which is
easy to operate by the user, makes it easy for the user to notice an error in the setting position,
and can be made compact.
[0031]
In addition, since the speaker and the microphone are disposed in the same device body, by
arranging in such a positional relationship that the sound wraps around from the speaker to the
microphone is the same, regardless of how the user installs the device body, It is possible to
04-05-2019
8
uniformly carry out echo cancellation processing of sound that gets around from the speaker to
the microphone.
This enables effective echo cancellation.
[0032]
First Embodiment An audio signal transmitting / receiving apparatus 1 according to a first
embodiment of the present invention will be described in detail below with reference to FIGS. 1
to 7.
The voice signal transmitting / receiving apparatus 1 is connected to a network such as the
Internet or a LAN.
The audio signal transmitting / receiving apparatus 1 transmits / receives an audio signal to /
from the audio signal transmitting / receiving apparatus 1 of the other party via the network,
whereby a user can talk to the user with the other party's audio conference apparatus 1 or an
audio between remote places Have a meeting.
[0033]
FIG. 1 is a perspective view showing the appearance of the audio signal transmitting / receiving
apparatus 1.
In the following description, the front side of the audio signal transmitting / receiving apparatus
1 is described as Y, the rear side as -Y, the right side as X, and the left side as -X.
2A is a plan view of the audio signal transmitting / receiving device 1 shown in FIG. 1, FIG. 2B is
a rear view of the audio signal transmitting / receiving device 1 as viewed from the -Y side, and
FIG. It is the front view which looked at the audio | voice signal transmitter / receiver 1 from Y
side. FIG. 3A is a right side view of the audio signal transmitting and receiving apparatus 1 as
viewed from the X side, and FIG. 3B is a left side view of the audio signal transmitting and
04-05-2019
9
receiving apparatus 1 as viewed from the -X side.
[0034]
The audio signal transmitting / receiving apparatus 1 is formed by supporting an apparatus body
2 of a long, substantially rectangular parallelepiped shape at a predetermined height from an
installation surface by substantially square U-shaped leg portions 3 fitted on both sides thereof.
The apparatus body 2 has an upper surface panel 20, a lower surface grille 21 and side panels
22 (22A, 22B) as a housing, and a long elongated speaker array 231 (described later with
reference to FIG. 4) inside the housing. A speaker device 23 (described later with reference to
FIG. 5) and a microphone array 24 (24A, 24B described in detail with reference to FIG. 5) of two
rows are provided.
[0035]
The speaker array 231 is provided in a row in the longitudinal direction on the lower surface of
the speaker device 23, and the microphone arrays 24 are provided in a row on both sides of the
speaker device 23 in the longitudinal direction. The configurations of the speaker device 23, the
speaker array 231, and the microphone array 24 will be described later in detail.
[0036]
The top panel 20 and the side panel 22 are resin panels as a cover of the internal structure
including the speaker array 231 and the microphone array 24, the top panel 20 is a long
member having a U-shaped cross section, and the side panel 22 is a flat plate. Shaped members.
Further, the lower surface grille 21 is a steel plate of a punch mesh having a substantially Ushaped cross section so as not to disturb the sound emission and sound collection of the speaker
array 231 and the microphone array 24.
[0037]
The operation unit 4 is embedded at the X-side end of the upper surface of the upper surface
panel 20, and the LED lighting unit 5 is embedded substantially at the center. As shown in FIG.
04-05-2019
10
2A, the operation unit 4 has an LCD (Liquid Crystal Display) 41 for displaying a setting state etc.
on the -X side, and an operation button group 42 for communication such as a ten key on the X
side. Arrange in parallel to be located.
[0038]
Furthermore, the operation unit 4 includes an operation button group 43 and an operation
button group 44 in parallel on the Y side of the LCD 41 and the operation button group 42. The
operation button group 43 is disposed on the −X side with respect to the operation button
group 44, and is for instructing volume up, down, or mute. The operation button group 44 is for
changing the setting of the audio signal transmitting / receiving apparatus 1. This setting
includes, for example, selection setting of any one of a first lighting mode and a second lighting
mode, which will be described later.
[0039]
The LCD 41 and the operation button groups 42 to 44 are all disposed with the Y side down, so
that operation and operation confirmation can be performed from the Y side.
[0040]
The LED lighting unit 5 includes a plurality of (five in the present embodiment) linear LED lamps
51 on the −Y side and the Y side.
The plurality of LED lamps 51 are arranged on the same parabola extending in the X-X direction.
Lighting of each LED lamp 51 is independently controlled by a lighting control unit (not shown)
attached to the inside of the top panel 20. Specifically, when the first lighting mode is set by the
operation button group 44, the directivity direction of the sound beam from the speaker array
231 described later among the LED lamps 51 is controlled to light up. Ru. This allows the user to
confirm the pointing direction of the voice beam.
[0041]
When the second lighting mode is set, the pointing direction of the sound collection beam of the
04-05-2019
11
microphone array 24 described later is controlled to light. In addition, the LED lamp 51 group of
Y side lights about the microphone array 24 of Y side, and the LED lamp 51 of-Y side lights about
the microphone array 24 of-Y side. This makes it possible to confirm whether voice is being input
and also allows the user to confirm the pointing direction of the sound collection beam.
[0042]
In the present embodiment, the voice signal transmitting / receiving apparatus 1 has a function
of controlling the sound collection beam in a plurality of areas and detecting the position of the
speaker based on the sound collection level in each area. The user can check whether the
position of the speaker has not been erroneously detected.
[0043]
In addition, the light emission mode is controlled to change according to the volume of the input
and output sound.
This allows the user to confirm that the sound input / output is performed at a sufficient volume.
[0044]
The connector group 6 with the external device is embedded in the side panel 22 (22A) on the X
side (see FIG. 3A). The connector group 6 includes a modular jack 61 for connecting to a LAN
such as Ethernet (registered trademark) or a network such as the Internet, an audio input
terminal 62A and an audio output terminal 62B for connecting to an audio device, and a power
source. The power supply terminal 63 is provided.
[0045]
By inserting a plug (not shown) of a modular cable into the modular jack 61, it becomes possible
to connect the audio signal transmitting / receiving device 1 to a network. As a result, the present
audio signal transmitting / receiving apparatus 1 can be connected to the network and
communicably connected to the other party's audio signal transmitting / receiving apparatus 1.
For this reason, it is possible to make a call or an audio conference with the voice signal
04-05-2019
12
transmitting / receiving apparatus 1 of the other party, so that the voice signal transmitting /
receiving apparatus 1 can be used as an IP telephone or a voice conference apparatus. .
[0046]
FIG. 4 is a bottom view of the audio signal transmitting and receiving apparatus 1 with the lower
surface grille 21 removed. FIG. 5 is a perspective view of a central portion of the audio signal
transmitting / receiving apparatus 1 of FIG. 6 is a cross-sectional view of the audio signal
transmitting / receiving apparatus 1 of FIG. FIG. 7 is a front view of the audio signal transmitting
/ receiving apparatus 1 of FIG.
[0047]
The speaker array 231 and the microphone array 24 are both attached to a frame 25 which also
serves as a baffle of the speaker array 231. The frame 25 is a box-like member in which the four
corners of a rectangular metal plate are bent upward. The speaker array 231 is attached
downward to the inside of the bottom of the frame 25, and the microphone array 24 has one row
(microphone array 24A) embedded in one side (Y side) of the frame 25 and the other one row
(microphone array 24B) Is embedded in the other side (-Y side).
[0048]
The lower end of a long cylindrical frame 232 is disposed on the upper side of the frame 25 so as
to cover the side surface of the speaker array 231, and the upper end of the frame 232 covers
the back of the speaker array 231. A top plate 233 having substantially the same size as the
bottom surface of the frame 25 is disposed on the upper surface of the frame 25.
[0049]
A support plate 26 which is a metal plate member is attached to a side surface (a bending portion
in the longitudinal direction) of the frame 25 so as to extend upward by a screw 27A, and the
upper end of the support plate 26 is bent inward. .
The bent portion and the end portion in the short side direction of the top plate 233 are attached
04-05-2019
13
by a screw 27 B, and thereby the frame body 232 is held between the top plate 233 and the
bottom surface of the frame 25.
[0050]
As described above, the housing 23A of the speaker array 231 is formed of a portion surrounded
by the frame 25, the top plate 233, and the cylindrical frame 232. A substrate (not shown) on
which a control unit (not shown) for controlling directivity of the speaker array 231 and the
microphone array 24 is mounted on the top surface of the housing 23A (the top surface of the
top plate 233). The speaker device 23 includes a control unit, a housing 23A, and a speaker array
231.
[0051]
In the speaker array 231, a plurality (for example, 16) of speaker units SP are arranged
substantially equally in a line, and a hole of the same size as the inner diameter of the speaker
units SP at the position of each speaker unit SP on the bottom of the frame 25 A portion 251 on
the sound emission side of the speaker unit SP is overlapped according to the hole 251. As
described above, the bottom surface of the frame 25 and the speaker array 231 are attached by
the screws 252 in a state in which the speaker unit SP is superimposed on the hole 251. By this,
a sound emitting surface is attached so as to look from the bottom surface, and the sound of each
speaker unit SP can be output from the bottom surface.
[0052]
As described above, by arranging the speaker array 231 toward the bottom surface of the audio
signal transmitting and receiving device 1, the audio beam from the speaker array 231 is output
to the lower side of the audio signal transmitting and receiving device 1. Since the audio signal
transmitting / receiving apparatus 1 is supported by the legs 3 at a predetermined height from
the installation surface (for example, a top of a desk), the audio beam is reflected by the
installation surface and propagates obliquely upward. As a result, it becomes possible to
efficiently provide the voice beam to the user whose head is located at the upper part on the Y-Y
side of the voice signal transmission / reception device 1.
04-05-2019
14
[0053]
Further, since the leg portion 3 has an inner space structure, it is possible to provide the user
with a sound without disturbing the sound emitted by the speaker array 231 or the reflected
sound on the installation surface.
[0054]
The control unit (not shown) gives a delay time to the voice signal from the voice signal
transmitting / receiving device 1 of the other party input through the modular jack 61 (see FIG.
1) to control directivity of the voice beam, received from the other party The amplified audio
signal is subjected to D / A conversion and amplification of the level of the converted audio
signal to be input to the speaker array 231.
[0055]
The microphone array 24 is composed of a plurality of (for example, 16) microphones 241
arranged in a line across the side surfaces (the bending portions in the longitudinal direction) of
the frame 25 as described above.
The microphones 241 are unevenly arranged so as to be denser toward the inside, whereby it is
possible to preferably pick up high-pitched sound with high directivity.
[0056]
The microphone array 24 is supported from the opposite side of the frame 25 by the support
plate 26 in which the notch 261 is formed at the position of the microphone 241, and the frame
25 and the support plate 26 are in a state where the microphone 241 is fitted in the notch 261.
And are screwed.
[0057]
As described above, the speaker array 231 is disposed toward the bottom surface of the speaker
device 23, and the microphone arrays 24A and 24B are attached toward the side surfaces of the
speaker device 23 (facing the respective side surfaces of the audio signal transmitting / receiving
device 1). As a result, it is possible to arrange the sound collection surface of the microphone
array 24 and the sound emission surface of the speaker array 231 at right angles.
04-05-2019
15
As described above, since the microphone array 24 can be disposed in the direction in which the
sound pressure of the sound output from the speaker array 231 is low, the acoustic coupling in
which the sound from the speaker array 231 is input to the microphone array 24 is effective. It
becomes possible to prevent.
[0058]
Further, the microphone array 24A is disposed toward the Y-side side surface, which is
perpendicular to the arrangement direction of the speaker units, of the device body side surface,
and the microphone array 24B is disposed toward the -Y-side side surface. The distances
between the arrays 24A, 24B are substantially identical.
For this reason, the sound that gets into the microphone arrays 24A and 24B is substantially the
same. The control unit of the audio signal transmitting / receiving device 1 does not have to use
the audio signal collected by the microphone array 24 when the user is on either the -Y side or
the Y side. It is possible to perform processing to remove the sound signal picked up in step S5,
and to effectively cancel the sound signal that has passed around from the speaker array 231.
[0059]
Each of the microphones 241 is a unidirectional microphone and is attached to the frame 25 so
that the position of the hole (not shown) is on the inner side of the frame 25, and of the frame 25
to cancel voice coming from behind. Holes 253 are formed on the bottom of the microphones
241 at positions behind them. Further, five round holes 262 B are formed around each
microphone 241 in the support plate 26, and a long hole 262 A is formed between each
microphone 241. The holes 253, 262A, 262B are small holes that can ensure the strength of the
frame 25 and the support plate 26.
[0060]
By forming the holes 253, 262A, 262B as described above, the acoustic resistance of the frame
25 and the support plate 26 prevents the microphone 241 from being unable to effectively
cancel the sound from directions other than the pointing direction. It becomes possible.
04-05-2019
16
[0061]
As described above, since the microphone 241 is a unidirectional microphone having low
sensitivity to the voice from the rear, the sound pickup surface of the microphone array 24 and
the sound emission surface of the speaker array 231 are disposed at right angles. Thus, the
speaker array 231 can be disposed at a position where the directivity of the microphone 241 is
low. This can also effectively suppress the above-mentioned acoustic coupling.
[0062]
The microphone array 24 is connected to a control unit (not shown) by a signal line (not shown),
and thereby inputs each signal collected by each microphone 241 to the control unit.
These input signals are subjected to directivity control by delay control after A / D conversion,
and are transmitted to voice signal transmitting / receiving apparatus 1 of the other party via
modular jack 61 (see FIG. 1), modular cable (not shown), etc. Will be sent.
[0063]
As described above, in the present embodiment, by disposing the speaker array 231 and the
microphone array 24 in the same audio signal transmitting / receiving device 1, when the user
performs input operation of the directional position, the directional position of the audio beam
When the pointing position of the sound collection beam is the same, only one operation may be
performed, and the operability can be improved.
[0064]
Further, when the position of the user is automatically detected and the sound beam and the
sound collecting beam are directed to the detection position, the pointing position of the sound
collecting beam is the same as the pointing position of the sound beam.
[0065]
Therefore, compared to the prior art in which the device provided with the microphone array 24
and the device provided with the speaker array are separate and detect the user position
individually, there is a false detection in the position of the user directing the sound collection
04-05-2019
17
beam When this happens, this false detection can be relatively easily recognized by the user.
That is, since there is no possibility that the user position for directing the sound beam and the
user position for directing the sound collection beam are not different as in the prior art, the
voice beam from the speaker array 231 can not be heard. The user can be made aware that there
has been a detection.
[0066]
Further, since the speaker array 24 and the microphone array 231 are provided in the same
device main body 2, the configuration that can be shared can be shared, so that the audio signal
transmission / reception device 1 can be made compact.
[0067]
In addition, since the speaker array 231 and the microphone array 24 are disposed in the same
device main body 2, the wraparound state of the sound from the speaker array 231 to the
microphone array 24 largely changes regardless of the way of installation of the device main
body 2 by the user. Since there is not, it is possible to uniformly perform the echo cancellation
processing of the sound that comes from the speaker array 231 to the microphone array 24.
This enables effective echo cancellation.
[0068]
Second Embodiment An audio signal transmitting / receiving apparatus 1 ′ according to a
second embodiment of the present invention will be described below with reference to FIG.
FIG. 8 is a perspective view of an audio signal transmitting / receiving apparatus 1 'according to
the second embodiment.
The audio signal transmitting / receiving device 1 'includes an elongated substantially
rectangular parallelepiped device body 2', a speaker array 231 'embedded in the upper surface of
04-05-2019
18
the device body 2' in the longitudinal direction, and both sides of the speaker array 231 '
Microphone arrays 24A 'and 24B' arranged in parallel to the speaker array 231 'are provided.
[0069]
As described above, since the speaker array 231 'is disposed on the upper surface, the sound
beam from the speaker array 231' is output upward, reflected by the ceiling or the like, and
directed downward. The user will listen to the voice beam output downward.
[0070]
The distances between the microphone arrays 24A 'and 24B' and the speaker array 231 'are
substantially the same. As a result, as in the first embodiment, the sound that wraps around to
the microphone arrays 24A 'and 24B' becomes substantially the same. The control unit of the
audio signal transmitting / receiving device 1 'is not shown in the microphone signal from the
microphone array 24' when the user is on either the -Y side or the Y side. It is possible to
perform processing to remove the audio signal collected by the array 24 'and to effectively
cancel the audio that has passed around from the speaker array 231'.
[0071]
The configurations of the speaker array 231 ′ and the microphone array 24 ′ are the same as
those of the first embodiment, and thus the description thereof is omitted. However, each
microphone 241 'which comprises microphone array 24' is not a unidirectional microphone in
2nd Embodiment.
[0072]
The audio signal transmitting / receiving apparatus 1 'is provided with a connector group 6 on
the side face on the X side, and has a function of communicating with the other party's audio
signal transmitting / receiving apparatus 1' as in the first embodiment. Further, the operation
unit 4 is embedded in the front surface (surface on the Y side) of the audio signal transmitting /
receiving device 1 'and on the right side (X side) of the microphone array 24' and the speaker
04-05-2019
19
array 231 '.
[0073]
The speaker array 231 ′ and the microphone array 24 ′ are attached so that the sound
emission direction and the sound collection direction are directed upward, whereby the sound
emission direction of the speaker array 231 ′ and the sound collection direction of the
microphone array 24 ′ are It is parallel.
[0074]
With the above configuration, in the second embodiment, as in the first embodiment, the
operability of the user is good, the user can notice the error of the setting position relatively
easily, and the downsizing is achieved. While being able to do this, it has the effect of being able
to perform echo cancellation effectively.
[0075]
Further, the sound emission direction of the speaker array 231 'and the sound collection
direction of the microphone array 24' become parallel, thereby making both the sound collection
beam and the sound beam coincide in the directivity regions of the sound collection beam and
the sound beam. It is possible to easily adjust the installation direction of the audio signal
transmitting / receiving device 1 'so that the direction can be effectively directed to the
directivity area.
[0076]
In the first and second embodiments, a plurality of microphone arrays 24 and 24 'are provided.
However, the present invention is not limited to this configuration, and any one of the
microphone arrays 24A and 24B, One of the microphone arrays 24A 'and 24B' may be provided.
[0077]
It is a perspective view which shows the external appearance of an audio | voice signal
transmitter / receiver.
(A) is a plan view of the audio signal transmitting / receiving device shown in FIG. 1, (B) is a rear
view of the audio signal transmitting / receiving device viewed from the -Y side, (C) is the audio
04-05-2019
20
signal transmitting / receiving device on the Y side It is the front view seen from.
(A) is a right side view of the audio signal transmitting and receiving apparatus 1 as viewed from
the X side, and (B) is a left side view of the audio signal transmitting and receiving apparatus 1 as
viewed from the -X side.
It is a bottom view in the state where the grille of the audio signal transmitting and receiving
device has been removed.
It is a perspective view of the center part of the audio | voice signal transmitter / receiver 1 of
FIG. It is AA sectional drawing of the audio | voice signal transmitter / receiver of FIG. It is a front
view of the audio | voice signal transmitter / receiver of FIG. It is a perspective view of the audio
| voice signal transmitter / receiver concerning 2nd Embodiment.
Explanation of sign
[0078]
DESCRIPTION OF SYMBOLS 1, 1'- audio | voice signal transmission / reception apparatus 2, 2'apparatus main body 3- leg part 4- operation part 231, 231 '-speaker array SP-speaker unit 24
(24A, 24B), 24' (24A ', 24B') )-Microphone array 241-microphone 61-modular jack (connector)
62B-audio output terminal (connector) 62A-audio input terminal (connector)
04-05-2019
21
Документ
Категория
Без категории
Просмотров
0
Размер файла
34 Кб
Теги
jp2007129486
1/--страниц
Пожаловаться на содержимое документа