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JPH05347799

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DESCRIPTION JPH05347799
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio apparatus such as a carpet which receives audio signals of a plurality of channels and
outputs them from a plurality of speakers as in stereo broadcasting of television.
[0002]
2. Description of the Related Art In a conventional acoustic apparatus of this type, a signal from a
signal source 1 such as a record, a compact disc, a magnetic tape, a television radio, etc. is It is
configured to be amplified and reproduced as sound by the speaker unit 3. The signal source 1,
the amplifier 2, and the speaker unit 3 are integrally configured (generally called a radio
cassette) as shown in FIG. 5 (a) or as shown in FIG. 5 (b). They are arranged independently of
each other and connected by a signal line 4 (generally called component stereo). More recently,
as shown in FIG. 5 (c), the signal source 1 is incorporated as a television into the screen 5, and
there are many cases where the user can enjoy the sound while watching the screen 5.
[0003]
[0003] And the one with an integral construction as shown in FIG. 5 (a) and the one with a
construction connected by signal line 4 as shown in FIG. 5 (b) It was difficult to obtain a threedimensional sound field. And, in order to create a more three-dimensional realistic sound field, a
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plurality of speakers are also provided behind the listener 6 as shown in the usage diagram of
FIGS. 6 (a) (plan view) and (b) (side view) It is common to arrange the part 7. The speaker unit 7
and the amplifier 2 disposed at the rear are connected by a signal line 4.
[0004]
However, as shown in FIG. 6 (b), the speaker 7 at the rear of the listener 6 is installed at various
positions depending on the shape and size of the room in which the acoustic device is installed,
and the sound field is However, even when the speaker unit 7 is installed, a sufficient effect can
not be obtained, or the rear unit continues with another room, and the rear speaker unit 7 can
not be installed. For this reason, as shown in FIG. 7A, the carpet 8 is provided with a plurality of
speaker parts 9 like the speaker parts 9-1 to 9-4 to always reproduce the sound field with the
highest sense of reality. It is being considered.
[0005]
Furthermore, there are also two-channel stereo broadcasts and recordings and a surround effect
added to television broadcasts and video tapes recently, and it is possible to enjoy more realistic
sound while watching the screen 5 There is a great demand for an audio device that can realize a
more realistic sensation. However, it is limited by the arrangement of the screen 5 and the front
speaker portion 3 and the rear speaker portion 7. That is, when an audio signal is formed by the
left and right channels of the left channel (hereinafter referred to as L-ch) and the right channel
(hereinafter referred to as R-ch), it is necessary to output the audio signal centering on the screen
5.
[0006]
Thus, the positional relationship between the screen 5 and the speaker 9 is as shown in FIGS. 7
and 8. FIG. 7A shows the case where the screen 5 is placed at the center of the long side of the
room, and FIG. 7B shows the case where the screen 5 is placed at the center of the short side of
the room. The carpet 8 is usually laid parallel to the side of the room, often as shown in FIG. For
this reason, when the speaker parts 9 of the carpet 8 are disposed at each corner of the carpet 8
and constituted by a total of four, in the case as shown in FIG. When the listener 6 listens to the
audio signal, the speaker units 9-1 and 9-2 must output the audio signal of the left channel, and
the speaker units 9-3 and 9-4 must output the audio signal of the right channel. In the case
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shown in FIG. 7 (b), when the listener 6 listens to the left and right two-channel audio signals
such as stereo broadcasting, the speaker units 9-2 and 9-3 are L-ch audio signals, and the
speakers The units 9-1 and 9-4 must output R-ch audio signals. If the relationship between the
long side length LC of the carpet 8 and the short side length LR of the room is LR <LC, this can
not be done by rotating the carpet 8 by 90 degrees in the same direction as the screen 5.
[0007]
FIG. 8 (a) shows the case where the screen 5 is placed at the corner of the room, and FIG. 7 (b)
shows the center of the short side of the room. The carpet 8 is often laid parallel to the sides of
the room, as in FIG. For this reason, in the case of FIG. 8A, when the listener 6 listens to the left
and right two-channel audio signals such as stereo broadcasting, the speaker unit 9-2 is an L-ch
audio signal and the speaker unit 9-. 4 is the R-ch audio signal, and the speaker sections 9-1 and
9-3 are either to stop the output or to combine the R-ch and L-ch synthetic audio signals
(monaural audio signals such as R-ch + L-ch) Need to output. In the case shown in FIG. 8 (b),
when the listener 6 listens to the left and right two-channel audio signals such as stereo
broadcasting, the speaker units 9-2 and 9-3 are L-ch audio signals, and the speakers The units 91 and 9-4 must output R-ch audio signals.
[0008]
Further, when enjoying the surround effect, for example, in the surround system called the 2-1
system, a monaural audio signal is output from the speaker section behind the listener 6.
Therefore, a voice signal of R-ch + L-ch and a combined voice signal of R-ch and L-ch are output.
In such a case, in FIG. 7A, L-ch from the speaker unit 9-1, R-ch from the speaker unit 9-4, and
monaural sound signals from the speaker units 9-2 and 9-3 are output. . In FIG. 7B, L-ch from the
speaker unit 9-2, R-ch from the speaker unit 9-1, and monaural sound signals from the speaker
units 9-3 and 9-4. Further, in FIG. 8A, L-ch from the speaker unit 9-2, R-ch from the speaker unit
9-4, and monaural audio signals from the speaker units 9-1 and 9-3. In FIG. 8B, L-ch from the
speaker unit 9-2, R-ch from the speaker unit 9-1, and monaural sound signals from the speaker
units 9-3 and 9-4.
[0009]
In the above configuration, the audio signals output from the speaker units 9-1 to 9-4 require
various combinations depending on the positional relationship between the screen 5 and the
carpet 8 or the speaker units 9-1 to 9-4.
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[0010]
SUMMARY OF THE INVENTION In order to cope with various positional relationships of the
speaker units 9-1 to 9-4 disposed on the screen 5 and the carpet 8 in the room as described
above, it is necessary to individually For example, it is impossible to change the position of the
screen 5 by changing the design of a room, for example.
[0011]
The present invention solves the above-mentioned problems, and when the audio signals of a
plurality of channels are output as they are in the positional relationship except for the case
where there is a screen in the vicinity of the speaker disposed at the corner of the carpet The
purpose is to give the degree of freedom to the positional relationship of the speaker parts
arranged on the carpet and the carpet.
[0012]
Furthermore, in the positional relationship in the case where there is a screen in the vicinity of
the speaker portion disposed at the corner portion of the carpet, the corner portion near the
screen, ie, the diagonal speaker portion passing through the speaker portion synthesizes audio
signals of a plurality of channels. The audio signal of each channel is output from the speaker
unit located at a symmetrical position with respect to the diagonal, or the audio signals of a
plurality of channels are processed and output from some of the speaker units. The purpose of
this is to give freedom in the positional relationship between the screen and the speaker unit
disposed on the carpet when enjoying the surround effect.
[0013]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present
invention provides a carpet, a plurality of speaker units disposed substantially around or inside
the carpet, and a plurality of channels from a signal source. And selecting means for selectively
outputting or stopping the audio signal to the plurality of speaker units.
[0014]
Also, processing means for processing audio signals of a plurality of channels from a signal
source, a carpet, a plurality of speaker portions disposed substantially around or inside the
carpet, and the input terminal portion It is comprised by the selection means which selectively
outputs or stops the audio signal of a several channel, and the output signal of the said process
means to the said several speaker part.
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[0015]
According to the present invention, according to the above configuration, the audio signal of a
plurality of channels is output as it is in the positional relationship except for the case where the
screen is in the vicinity of the speaker disposed at the corner of the carpet. The positional
relationship of can be easily changed as though each is a dedicated sound device.
[0016]
Further, in the positional relationship in the case where there is a screen in the vicinity of the
speaker portion disposed at the corner portion of the carpet, the corner portion in the vicinity of
the screen, ie, the diagonal speaker portion passing through the speaker portion When the audio
signal of each channel is output from the speaker unit which outputs the monaural audio signal
and is located at a symmetrical position with respect to the diagonal line, the speaker unit is
subjected to surround processing using audio signals of a plurality of channels as input signals
Further, the positional relationship between the screen and the speaker unit can be easily
changed as though they are dedicated audio devices.
[0017]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a block diagram of an
acoustic device showing an embodiment of the present invention.
The same reference numerals as in FIGS. 4 to 6 denote the same components, and therefore the
description thereof will be omitted.
In the present embodiment, a case where four speaker portions 9-1 to 9-4 are disposed at the
corner portion of the carpet 8 will be described.
[0018]
The audio signals (R-ch and L-ch) of two channels input from the input terminal unit 10 are
transmitted through the signal line 4 through the switches 11-1 to 11-4 which are selection
means A11 to the speaker unit 9-. 1 to 9-4.
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Therefore, to the speaker units 9-1 to 9-4, the audio signals of R-ch are output from the
corresponding speaker units 9-1 to 9-4 by the switches 11-1 to 11-4 which are selection means
11. It is possible to select whether to output the L-ch audio signal or to stop the output of the
audio signal.
[0019]
That is, in the case of the positional relationship as shown in FIG. 7A, for example, audio signals
of two channels are inputted from the signal source 1 having the screen 5 from the input
terminal section 10 and this audio signal is By connecting certain switches 11-1 and 11-2 to the
L side and switches 11-3 and 11-4 to the R side, L-ch audio signals are output from the speaker
units 9-1 and 9-2. Be done.
Further, R-ch audio signals are output from the speaker units 9-3 and 9-4.
When the positional relationship as shown in FIG. 7B is established, the switches 11-2 and 11-3
serving as the selection means 11 are connected to the L side, and the switches 11-1 and 11-4
are connected to the R side. L-ch audio signals are output from the speaker units 9-2 and 9-3.
Further, R-ch audio signals are output from the speaker units 9-1 and 9-4.
[0020]
Therefore, in the example of the positional relationship as shown in FIG. 7, even if the size of the
room and the size of the carpet are LR <LC, it is possible to cope with one acoustic device without
preparing a dedicated acoustic device. .
[0021]
Further, in the positional relationship as shown in FIG. 8A, for example, the switches 11-1 and
11-3 which are the selection means 11 are on the OFF side, the switch 11-2 is on the L side, and
the switch 11-. When 3 is connected to the R side, the output of the audio signal is stopped from
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the speaker units 9-1 and 9-3, and the L-ch audio signal is output from the speaker unit 9-2.
Further, an audio signal of R-ch is output from the speaker unit 9-4.
When the positional relationship as shown in FIG. 8B is established, the switches 11-2 and 11-3
as the selection means 11 are connected to the L side, and the switches 11-1 and 11-4 are
connected to the R side. L-ch audio signals are output from the speaker units 9-2 and 9-3.
Further, R-ch audio signals are output from the speaker units 9-1 and 9-4.
[0022]
Therefore, as in the example of the positional relationship as shown in FIG. 8, even if the screen 5
is on the diagonal of the carpet 8 (see FIG. 8A) or on the center line of the side (FIG. b) See) One
audio device can cope with it without preparing a dedicated audio device.
[0023]
FIGS. 2 and 3 show the case where the surround effect is enjoyed by processing the audio signals
of two channels of L-ch and R-ch and outputting them from a part of the speaker unit, as shown
in FIG. 8 (a). In the positional relationship in the case where there is a screen in the vicinity of the
speaker part arranged at the corner part of the carpet, the speaker part on the diagonal part
passing through the corner part near the screen, ie the speaker part, has two channels of L-ch
and R-ch. An embodiment of the present invention is shown when outputting a monaural audio
signal obtained by synthesizing audio signals and outputting an L-ch or R-ch audio signal from a
speaker unit located at a symmetrical position with respect to the diagonal line. It is a block
diagram of an acoustic device.
[0024]
In this embodiment, the case where four speaker portions 9-1 to 9-4 are disposed at the corner
portion of the carpet 8 will be described.
For example, audio signals of two channels are input from the signal source accompanied with
the screen 5 from the input terminal unit 10, and audio signals of two channels (R-ch and L-ch)
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and audio signals of two channels (R-ch and The audio signal processed by (L-ch) + (R-ch) or (Lch)-(R-ch) or further processing means 13 for shifting or delaying the phase is The signal is input
to the speaker units 9-1 to 9-4 through the signal line 4 via the switches 12-1 to 12-4 which are
selection means 12.
Therefore, the audio signals of R-ch are output from the corresponding speaker units 9-1 to 9-4
by the switches 12-1 to 12-4 as the selection means 12 to the speaker units 9-1 to 9-4. It is
possible to select whether to output the L-ch audio signal, to output the audio signal processed
by the processing means, or to stop the output of the audio signal.
[0025]
That is, in the positional relationship as shown in FIG. 7A, audio signals of two channels are input
from the signal source 1 from the signal source 1 with the screen 5 as shown in FIG. Means (13)
processes (L-ch)-(R-ch), and further, the switch 12-1 as the selection means 12 is on the L side,
and the switches 12-2 and 12-3 are on the M side. 4 is connected to the R side, the L-ch from the
speaker unit 9-1, (L-ch)-(R-ch) from the speaker units 9-2 and 9-3, and the speaker unit 9-4 An Rch audio signal is output. That is, the surround effect of the 2-1 system is obtained by this. Even
in the positional relationship as shown in FIG. 7B, the following operation may be performed to
obtain the same surround effect. That is, the switch 12-2 serving as the selection means 12 is
connected to the L side, the switches 12-3 and 12-4 to the M side, and the switch 12-1 to the R
side. Audio signals of (L-ch)-(R-ch) are output from the -ch and the speaker units 9-3 and 9-4, and
an R-ch audio signal is output from the speaker unit 9-1.
[0026]
Therefore, even if LR <LC in the example of the positional relationship as shown in FIG. 7, the
surround effect can be enjoyed with one acoustic device without preparing a dedicated acoustic
device.
[0027]
Further, in the case of the positional relationship as shown in FIG. 8A, audio signals of two
channels are input from the signal source 1 from the signal source 1 with the screen 5 as shown
in FIG. Means 13 processes (L-ch)-(R-ch) and (L-ch) + (R-ch), and further, the switch 12-1 which is
the selection means 12 is switched to the M + side. The sound of (L-ch) + (R-ch) from the speaker
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unit 9-1 is obtained by connecting the -2 to the L side, the switch 12-3 to the M- side, and the
switch 12-4 to the R side. The signal is L-ch audio signal from the speaker unit 9-2, and (L-ch)-(Rch) audio signal from the speaker unit 9-3 and R- from the speaker unit 9-4. The audio signal of
ch is output.
That is, the surround effect of the 3-1 system is obtained.
[0028]
In order to obtain the surround effect even in the positional relationship as shown in FIG. 8B, the
following operation may be performed. That is, the switch 12-2 serving as the selection means
12 is connected to the L side, the switches 12-3 and 12-4 to the M-side, and the switch 12-1 to
the R side. The L-ch and the speaker units 9-3 and 9-4 output (L-ch)-(R-ch), and the speaker unit
9-1 outputs an R-ch audio signal. Thereby, the surround effect of the 2-1 system can be realized.
[0029]
Therefore, even in the example of the positional relationship as shown in FIG. 8, the surround
effect can be enjoyed by one acoustic device without preparing a dedicated acoustic device.
[0030]
Also, with the positional relationship as shown in FIG. 8A, the processing of (L-ch) + (R-ch) of the
processing means 13 of FIG. 1 is connected to the M + side, the switch 12-2 is connected to the L
side, the switch 12-3 is connected to the OFF side, and the switch 12-4 is connected to the R side.
Audio signal of L-ch is output from the speaker unit 9-2, and an audio signal of R-ch is output
from the speaker unit 9-4. The audio signal is stopped.
Even when the surround effect is not enjoyed in this way, the voice of a person with a sense of
localization on the screen 5 can be obtained.
[0031]
It should be noted that a power amplifier (not shown) for amplifying the audio signal to the
speaker unit 9 in a power-wise manner is in front of the speaker unit 9 even in front of the
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selection means A11 or B12 or the processing means 13. Either way is fine.
[0032]
The switches 11-1 to 11-4 and 12-1 to 12-4 of the selection means 11 and the selection means
12 may be made of semiconductors.
[0033]
In the present embodiment, the number of loudspeakers 9 is four. However, the number of
loudspeakers 9 is not limited to four and may be two or more.
[0034]
Although the signal source 1 accompanied by the screen 5 is taken as an example in the present
embodiment, the same effect can be obtained when the signal source 1 is not accompanied by
the screen 5.
[0035]
Furthermore, the processing contents of the processing means 13 are not limited to the present
embodiment, and the phase of the audio signal may be shifted or delayed with respect to the
input audio signal, or may be attenuated or amplified by a certain frequency band. good.
[0036]
As described above, according to the configuration of the present invention, the following effects
can be obtained.
1) A plurality of selection means A for selectively outputting or stopping audio signals of a
plurality of channels input from the input terminal section to the plurality of speaker sections,
the audio signals of the channel and a plurality of filters disposed substantially around or inside
the carpet By providing it between the speaker unit and the speaker unit, it is possible to provide
an acoustic device which can cope with the positional relationship between various combinations
of the screen and the speaker unit by a simple operation of switching the selection means A.
2) Selection means B for selectively outputting or stopping audio signals of a plurality of
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channels input from the input terminal portion and audio signals obtained by processing the
audio signals by the processing means to the plurality of speaker portions By providing between
the signal and a plurality of speaker units disposed substantially around or inside the carpet, it is
possible to simply switch the selection means B even in the positional relationship between
various combinations of the screen and the speaker units. It is possible to provide an audio
device that can cope with the surround effect by operation and to provide a diagonal speaker
passing through the corner near the screen, that is, the speaker in the positional relationship in
the case where the screen is near the speaker disposed at the corner of the carpet. Outputs a
monaural audio signal synthesized from audio signals of a plurality of channels from the From
the speaker unit in position it can be realized sound field with a sense of localization by
outputting audio signals of different channels.
[0037]
Brief description of the drawings
[0038]
1 is a block diagram of an acoustic device according to an embodiment of the present invention
[0039]
Fig. 2 is a block diagram of an acoustic device in the case where the processing contents of the
processing means are (L-ch)-(R-ch) in another embodiment of the present invention.
[0040]
Fig. 3 is a block diagram of the acoustic device in the case where the processing contents of the
processing means are (L-ch) + (R-ch) and (L-ch)-(R-ch) in another embodiment of the present
invention.
[0041]
Fig. 4 System configuration of conventional acoustic device
[0042]
Fig. 5 (a) A specific configuration diagram of an acoustic device in which the conventional signal
source, amplifier and speaker unit are integrated.
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[0043]
Fig. 6 (a) Actual condition of use of conventional acoustic device
[0044]
Fig. 7 (a) Actual use when the screen is placed at the center of the long side of the room
[0045]
Fig. 8 (a) Actual use when the screen is placed at the corner of the room
[0046]
Explanation of sign
[0047]
1 signal source 4 signal line 5 screen 8 carpet 9-1 to 9-4 speaker unit 11 selection means 11-1
to 11-4 switch 12 selection means 12-1 to 12-4 switch 13 processing means
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