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JP2001275194

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DESCRIPTION JP2001275194
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system, an information transmitting apparatus and a speaker apparatus which are
suitably applied to a wireless type surround speaker system in which speakers are arranged
around a listener. Specifically, the information transmission apparatus for distributing audio
information to a plurality of speaker apparatuses is provided, and the transmission side adds
synchronization information to a data string obtained by connecting audio information for each
speaker apparatus in time division, and the reception side By reproducing and outputting audio
information simultaneously from all the speaker devices based on the synchronization
information, it is possible to reduce the difference in sounding time between the speaker devices
and to construct a wireless surround speaker system. .
[0002]
2. Description of the Related Art In recent years, as a speaker system using an information
processing apparatus such as a game machine or a DVD (Digital Versatile Disc) apparatus as a
sound source, a plurality of speakers are arranged to surround the listener. There are many cases
where surround speaker systems are used to listen to sound effects in an aerial battle scene,
background music in digital movies, and the like. In this type of speaker system, a center speaker
and a woofer (bass) are placed in front of the listener, main speakers are placed on the left and
right of the listener, and rear speakers are placed on the left and right of the listener in order to
increase the sound effect. .
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[0003]
For example, in the sound reproduction processing of the air fighter scene of the jet fighter in the
game machine, the explosion sound of the enemy jet fighter approaching from the front of the jet
maneuvered by the listener is uttered from the main speaker from woofer (bass) and left and
right, After that, as the enemy jet fighter moves away from the rear speaker, the sound
generation is gradually reduced, and the listener can hear this sound effect as if it was
experienced with a real aircraft.
[0004]
FIG. 11 is a block diagram showing a configuration example of a surround speaker system 10
according to a conventional method.
The surround speaker system 10 shown in FIG. 11 reproduces six voices supplying audio signals
to six speakers 5A, 5B, 6, 9A, 9B, 18 and these speakers 5A, 5B, 6, 9A, 9B, 18 Devices 1, 2, 3, 4,
7, 8 are provided.
[0005]
An information processing apparatus such as a game machine (not shown) or a DVD apparatus is
provided with output terminals for six audio channels, and the surround speaker system 10
shown in FIG. 11 is connected to this output terminal. The audio signal SL for the main left audio
channel is supplied to the input portion of the reproduction processing apparatus 1 for the left
(L) main, and the main speaker 5A is connected to the output portion via the wire W1 of length
L1. It is connected so as to produce the left main audio signal after amplification of the left main
audio signal.
[0006]
The audio signal SR for the main right audio channel is supplied to the input portion of the right
(R) main reproduction processing device 2 and the main speaker 5B is connected to the output
portion via the wire W2 of length L2 It is connected so as to produce the right main audio signal
after amplifying the right main audio signal.
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[0007]
The audio signal SC for the center speaker is supplied to the input portion of the reproduction
processing apparatus 4 for the center speaker, and the center speaker 6 is connected via the wire
W3 of the length L3 and the audio for the center after amplification It is made to pronounce the
signal SC.
At this time, it plays a role of making the lines of the actor clear by emphasizing the midrange.
[0008]
On the other hand, the audio signal SW for the woofer speaker is supplied to the input section of
the woofer reproduction processing device 3, and the woofer speaker 18 is connected via the
wire W6 of length L6, and for the woofer speaker after amplification To produce the audio signal
SW. Since this audio signal SW is supplied as needed, sound generation is also performed
accordingly.
[0009]
Further, the audio signal SLR for the left rear audio channel is input to the reproduction
processing unit 7 for the left rear. The reproduction processing device 7 amplifies the left rear
audio signal SLR. A speaker 9A for L rear is connected to the reproduction processing device 7
through a wire W4 of length L4 so that the left rear audio signal SLR is produced after
amplifying the left rear audio signal SLR. To be done.
[0010]
Also, the audio signal SRR for the right rear audio channel is input to the reproduction processing
unit 8 for the right rear. The reproduction processing device 8 amplifies the audio signal SRR. A
speaker 9B for the R rear is connected to the reproduction processing device 8 through a wire
W5 of a length L5 so that the right rear · audio signal SRR after amplifying the right rear · audio
signal is produced Is done. With this system 10, it is possible to listen to sound effects such as
passing by jets full of sense of reality, back music of digital images, and the like when playing
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back game machines and DVD devices.
[0011]
By the way, according to the conventional surround speaker system 10, in order to increase the
sound effect, for example, the entire living room is used, and one center speaker 6 near the
monitor viewed by the listener is used. And the woofer speakers 18 respectively, and when trying
to place four speakers at the four corners of the living space, the center speaker 6 disposed in
front of the listener, the woofer speakers 18 and the reproduction processing device 4, 3 Are
connected by wires W3 and W6 of lengths L3 and L6, respectively, and between the main
speakers 5A and 5B arranged on the left and right of the playback processing device 1 and 2 by
wires W1 and W2 of lengths L1 and L2, respectively. Between the rear speakers 9A and 9B and
the reproduction processing devices 7 and 8 which are connected and arranged on the rear left
and right sides, there are wires of lengths L4 and L5. It must be connected by yer W4, W5.
[0012]
For this reason, there is a problem that the six wires W1 to W6 are wired to the living room,
which is troublesome.
By the way, there is a concept of connecting each reproduction processing device 1, 2, 3, 4, 7, 8
and speakers 5A, 5B, 6, 9A, 9B, 18 etc by wireless system, but 6 speakers at the same time In
order to produce sounds 5A, 5B, 6, 9A, 9B and 18, six transmitters must be provided.
[0013]
Therefore, the present invention solves such conventional problems, and it is possible to
construct a wireless surround speaker system with a single transmission means while eliminating
the wiring between the speaker device and the reproduction processing apparatus. It aims at
providing a speaker system, an information transmitting device, and a speaker device.
[0014]
SUMMARY OF THE INVENTION In order to solve the above problems, a speaker system
according to the present invention connects a plurality of speaker devices for receiving an audio
signal, and audio information corresponding to each of the speaker devices in time division. The
present invention is characterized in that it comprises: an information transmitting apparatus for
adding synchronization information to the combined data string and transmitting it, and
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reproducing and outputting audio information simultaneously from all the speaker devices based
on the synchronization information.
[0015]
According to the speaker system of the present invention, on the transmitting side, the
information transmitting apparatus combines audio information corresponding to each of the
speaker devices in time division to create a data string, and adds synchronization information to
the data string. Sent to the receiver.
On the receiving side, for example, audio information addressed to the own device is detected by
the speaker device, and audio information is simultaneously reproduced and output by all the
speaker devices based on the detected synchronization information.
[0016]
Therefore, since the time difference of the sound generation between the speaker devices can be
eliminated, it is possible to construct a wireless surround speaker system with a single
transmission device.
Moreover, the wiring between the speaker device and the information transmitting device can be
eliminated.
[0017]
The information transmitting apparatus according to the present invention connects audio
information to be transmitted to a plurality of speakers in time division to generate a data string,
and a control unit to which synchronization information is added and a data string to which
synchronization information is added. And a transmitter unit for transmitting the signal to the
speaker device.
[0018]
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5
According to the information transmitting apparatus of the present invention, the control unit
generates a data string in which audio information transmitted to a plurality of speakers is
connected in time division, and synchronization information is added.
After that, the data string to which the synchronization information is added is transmitted by the
transmission unit to each speaker device.
[0019]
Therefore, when reproducing and outputting audio information from all the speaker devices
simultaneously on the receiving side, the synchronization information can be commonly used by
the respective speaker devices, so that the time difference of the sound generation between the
speaker devices can be eliminated. .
[0020]
According to the speaker device of the present invention, when the receiving unit receives a data
string in which audio information is connected in time division, the control unit detects
synchronization information and audio information addressed to the own device from the
received data string Be done.
The audio information detected here is recorded in the memory unit. The control unit controls
the audio processing unit to reproduce and output the audio information read from the memory
unit based on the synchronization information, so that the audio processing unit reads the audio
information from the memory unit and reproduces the audio information. The audio signal
reproduced by the audio processing unit is amplified by the speaker.
[0021]
Therefore, when reproducing and outputting audio information simultaneously from all the
speaker devices on the receiving side, the audio signal reproduced and output by the audio
processing unit can be simultaneously amplified from the speakers by this synchronization
information.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION A speaker system, an information
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transmitting apparatus and a speaker apparatus according to an embodiment of the present
invention will be described in detail below with reference to the drawings.
[0023]
(1) Embodiment In this embodiment, an information transmitting apparatus for distributing audio
information to a plurality of speaker devices with a receiving function is provided, and
synchronization information is arranged in a data string in which each audio information is
connected in time division on the transmitting side. In addition, on the receiving side, audio
information is reproduced and output simultaneously from all the speaker devices based on this
synchronization information, so that the difference in sounding time between the speaker devices
can be reduced, and wireless transmission with a single transmission device is possible. It is
possible to construct a surround speaker system of the type.
[0024]
The speaker system 100 shown in FIG. 1 has n speaker devices #i (i = 1 to n) with a receiving
function.
The speaker device #i is disposed at the front left and right as viewed from the listener, or at the
center thereof, or at the rear left and right thereof.
In the case of constructing a small-scale surround system in a home or the like, each speaker
device #i is battery-powered.
In the case of constructing a large-scale surround system in theaters or movie theaters, each
speaker device #i is driven by a commercial power source.
[0025]
The speaker system 100 is provided with an information transmission device 11, and a data
string (DS: Data Stream) is created by connecting audio information corresponding to each of the
speaker devices #i in a time division manner, and data to which synchronization information is
added The column DS is adapted to transmit to n speaker devices #i with receive function. This
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synchronization information is used to reproduce and output audio information simultaneously
from all the speaker devices #i.
[0026]
The information transmission apparatus 11 is provided with a control unit 12 for transmission,
and for example, a data string DS is generated in which audio information transferred from a
personal computer or a DVD (Digital Versatile Disc) apparatus is connected in time division. Ru.
The audio information includes, for example, information D # 1 obtained by compressing an
audio signal for the front center, information D # 2, obtained by compressing an audio signal for
the left and right, D # 3, and information D # 4 obtained by compressing an audio signal for left
and right. , D # 5 and so on. In this example, synchronization information is added to a data
string DS obtained by connecting information D # 1 to D # 5.
[0027]
The control unit 12 writes the ID information of the transmission destination speaker device #i in
the header of the audio information addressed to each speaker device #i. The ID information is
used on the receiving side to detect audio information addressed to the own device in
comparison with the ID information set in advance in each speaker device #i. If the ID
information is different, it is not the audio information addressed to the own device, so even if
the audio information is received, it is excluded from the memory storage target.
[0028]
A transmission unit 13 is connected to the control unit 12 to transmit a data string DS to which
ID information and synchronization information are added to each speaker device #i. As a
transmission mode, a wireless system or an infrared transmission system is adopted to realize a
wireless system. In the case of the wireless system, the antenna 14 is provided to the information
transmission device 11 and each speaker device #i, but the transmission power that can be
radiated by the information transmission device 11 may be limited by the radio wave method. In
the case of the infrared transmission method, the information transmission apparatus 11 is
provided with an infrared light emitting unit (not shown), and each speaker device #i is provided
with an infrared light receiving unit to transmit and receive a data string DS modulated by a
predetermined modulation method. It is done like that.
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[0029]
Subsequently, a control method of the speaker system 100 according to the present embodiment
will be described. FIG. 2 is a flowchart showing an example of control of the speaker system 100.
[0030]
In this embodiment, it is assumed to control a speaker system 100 provided with a plurality of
speaker devices #i having a receiving function. For example, five speaker devices #i (i = 5) are
disposed at the front left and right as viewed from the listener, at the center thereof, or at the
rear left and right thereof.
[0031]
On the premise of this, on the transmission side, a data string DS is created by connecting audio
information corresponding to each of the speaker devices # 1 to # 5 in time division by the
information transmitting apparatus 11 in step A1 of the flowchart shown in Be done. For
example, in the control unit 12, a data string DS is generated by connecting audio information
transferred from a personal computer or a DVD device in a time division manner. The audio
information is, for example, information D # 2 and D # 3 obtained by compressing an audio
signal for left and right front, information D # 4 and D # 5 obtained by compressing an audio
signal for left and right back, and an audio signal for front center Information D # 1 and the like.
[0032]
Thus, a data string DS in which the information D # 1 to D # 5 are connected is created. Further,
the control unit 12 writes the ID information of the transmission destination speaker device #i in
the header of the audio information addressed to each of the speaker devices # 1 to # 5.
Thereafter, the process proceeds to step A3 where the control unit 12 adds synchronization
information to the data string DS in which the ID information is written. Then, the process
proceeds to step A3, and the data string DS to which synchronization information is added is
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transmitted by the transmission unit 13 to the reception side.
[0033]
On the other hand, on the reception side, the data string DS is simultaneously received by the
respective speaker devices # 1 to # 5 in step B1. Then, the process proceeds to step B2 and audio
information addressed to the own device is detected. For example, on the receiving side, this ID
information is compared with the ID information set in advance for each speaker device #i and
the ID information of the destination speaker device #i described in the header of the audio
information. If these pieces of ID information match, this information is stored in a memory or
the like because it is audio information addressed to the own device. If the ID information is
different, it is not the audio information addressed to the own device, so even if the audio
information is received, it is excluded from the memory storage target.
[0034]
Thereafter, the process proceeds to step B3 and synchronization information is detected in each
of the speaker devices # 1 to # 5. Then, when the synchronization information is detected, the
process proceeds to step B4, and audio information is simultaneously reproduced and output by
all the speaker devices #i based on the synchronization information.
[0035]
Therefore, since it is possible to eliminate the time lag of the sound generation between the
speaker devices #i, a wireless type surround speaker system such as a small scale surround
system for general household use or a large scale surround system for theater or movie theater is
constructed. can do. Moreover, it is possible to construct inexpensively a surround system in
which the information transmitting apparatus 11 (master unit) is one and the speaker device #i
(child unit) having a receiving function has a total of five speaker devices # 1 to # 5 it can. In
particular, the speaker devices # 4 and # 5 disposed at the left and right of the rear as viewed
from the listener, the speaker devices # 2 and # 3 disposed at the left and right sides of the front,
and the speaker device # 1 disposed at the center thereof The occurrence of deviation can be
suppressed.
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10
[0036]
(2) Embodiment FIG. 3 is a perspective view showing a configuration example of a wireless type
surround speaker system 200 as an embodiment according to the present invention. In this
embodiment, the information transmitting apparatus 11 (master unit) is provided with a speaker
reproduction output function and used as a center speaker unit # 1, and four other speaker units
(child units) # 2 to # 5 A wireless surround speaker system 200 is configured.
[0037]
In the surround speaker system 200 shown in FIG. 3, a speaker device # 1 as an example of an
information transmitting device (master device), which is an example of an information
transmitting device (master device), is disposed on a monitor 15 of the DVD device 16 as an
image and audio information source. While 1D1 is set as the ID information of the apparatus # 1,
the bass information D # 1 is reproduced and output. On the left side of the monitor 15, a
speaker apparatus # 2 for the left channel (hereinafter simply referred to as L) is disposed, 1D2
is set as its ID information, and audio information for the audio / L channel front (hereinafter
referred to simply as LF Information D # 2 is reproduced and output.
[0038]
On the right side of the monitor 15, a speaker apparatus # 3 for the right channel (hereinafter
simply referred to as "R") is disposed, 1D3 is set as its ID information, and audio information for
the audio / R channel front (hereinafter referred to simply as "RF information") It is made to
reproduce and output D # 3).
[0039]
Further, a speaker device # 4 for the left channel (hereinafter simply referred to as L) is disposed
on the rear left side of the listener 20, 1D4 is set as its ID information, and audio information for
the audio / L channel rear (hereinafter The LR information D # 4 is simply reproduced and
output.
On the rear right side of the listener 20, a speaker device # 5 for the right channel (hereinafter
simply referred to as "R") is disposed, 1D5 is set as its ID information, and audio information for
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the rear of the audio / R channel (hereinafter simply referred to as "RR" Information D # 5 is
reproduced and output.
[0040]
FIG. 4 is a front view of partial crushing showing an example of the internal configuration of the
speaker device # 1 on the transmission side. FIG. 5 is a side view of partial crushing showing an
example of the internal configuration of each speaker device #i (i = 2 to 5) on the receiving side.
[0041]
Each of the speaker devices # 1 to # 5 shown in FIG. 3 has a structure in which legs 22A, 22B,
etc. are provided on a rugby ball-like casing 21 as shown in FIG. 4, for example. The housing 21
is formed by injection-encapsulating resin in a mold for the front surface and a rear surface
representing a half of a rugby ball and shaping the resin, and thereafter, combining shaping
members for the front surface and the rear surface. Bosses 24A and 24B for fixing the speaker
23 shown in FIG. 5 to the shaping member for the front surface, and a lattice portion 25 for
sound generation are provided.
[0042]
The speaker 23 and the control unit 28 are provided in the housing 21. For each control unit 28,
the center speaker device # 1 is driven by the commercial power, but the remaining R, L channel
main speaker devices # 2, # 3, # 3, R, L channel rear The speaker devices # 4 and # 5 are battery
operated. This is because the speaker devices # 2 to # 5 can be moved and arranged at desired
positions of the listener 20. Of course, the speaker device # 1 may be battery-operated.
[0043]
An infrared light emitting unit 26 forming a part of the transmitting unit is provided on the
ceiling surface of the casing of the transmitting side speaker device # 1 shown in FIG. It is made
to transmit simultaneously to four speaker apparatuses # 2- # 5 with a function. An infrared light
receiving unit 27 forming a part of a receiving unit is provided on the ceiling surface of the
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casing of each of the speaker devices # 2 to # 5 on the receiving side shown in FIG. 5, and a data
string DS to which synchronization information is added is for reception. Under the control of the
control unit 38, they are simultaneously received.
[0044]
FIG. 6 is a block diagram showing an example of the internal configuration of the speaker device
# 1 with the information transmission function. The speaker device # 1 shown in FIG. 6 is
provided with a control unit 28 forming a control unit. The control unit 28 includes a
microcomputer (hereinafter simply referred to as a microcomputer) 31, an audio processing unit
32, and a memory unit 34.
[0045]
The microcomputer 31 is an example of a control unit, and bass information D # 1 and LF
information D # for making the audio information transferred from the DVD device 16
correspond to the speaker devices # 1 to # 5 including the own device. 2. A data string DS is
created in which the RF information D # 3, the LR information D # 4, and the RR information D #
5 are connected in time division. Further, the microcomputer 31 writes the ID information of the
transmission destination speaker device #i in the header of the audio information addressed to
each speaker device #i.
[0046]
For example, the microcomputer 31 describes 1D1 in the header of the bass information D # 1 as
ID information, similarly describes 1D2 in the header of the LF information D # 2, and ID3 in the
header of the RF information D # 3. In the LR information D # 4, 1D4 is described, and in the RR
information D # 5, 1D5 is described. Synchronization information for reproducing and outputting
audio information simultaneously from all the speaker devices # 1 to # 5 is added to the data
string DS by the microcomputer 31.
[0047]
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An infrared light emitting unit 26 as an example of a transmitting unit is connected to the
microcomputer 31, and the speaker apparatus # 2 of the infrared light after modulating the data
string DS to which ID information and synchronization information are added by a
predetermined modulation method It is simultaneously transmitted to ~ # 5. In addition to this, a
memory unit 34 is connected to the microcomputer 31 so that the bass information D # 1
addressed to the own device is detected and recorded. An audio processing unit 32 is connected
to the microcomputer 31, and based on the synchronization information, the compressed bass
information D # 1 is read from the memory unit 34, and the information is decompressed and
reproduced. A speaker 23 is connected to the audio processing unit 32, and the bass audio signal
output from the audio processing unit 32 is expanded.
[0048]
The speaker device # 1 is provided with a power supply unit 29, and is configured to supply a
drive voltage after converting a commercial power supply to a direct current low voltage to the
infrared light emission unit 26, the microcomputer 31, the audio processing unit 32, and the
memory unit 34. Ru. The power supply unit 29 may be configured by a battery, and the speaker
device # 1 may be battery-driven.
[0049]
FIG. 7 is an image diagram showing a format example of the data string DS. As for the data string
shown in FIG. 7, a format prepared in advance by the DVD device 16 or the like or a format
prepared in advance by the speaker device # 1 is used. The body of audio information is divided
into each packet and transmitted.
[0050]
In this example, a transfer command is described in the header (head) of the data string so that
automatic reception is possible in the four speaker devices # 2 to # 5. The transfer command is
data for initializing (starting up) the speaker devices # 2 to # 5 in the standby state. Following
the transfer command, five sets of audio information including the own device are described.
[0051]
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For example, ID5 is described as ID information at the head of the packet following the header
describing the transfer command, and RR information D # 5 is described in the subsequent
packet. The RR information D # 5 is audio information obtained by compressing an audio / audio
signal for the right rear. Of course, although not shown after the RR information D # 5, an error
correction code such as an attribute such as the head, middle, or end of the packet, or parity is
described.
[0052]
Similarly, ID4 is described at the head of the packet following the RR information D # 5, and LR
information D # 4 and an error correction code are described in the packet following the ID
information. The LR information D # 4 is audio information obtained by compressing an audio /
audio signal for the left rear. Furthermore, ID3 is described at the head of the packet following
the LR information D # 4, and RF information D # 3 and an error correction code are described in
the packet following the ID information. The RF information D # 3 is audio information obtained
by compressing an audio / audio signal for the front right.
[0053]
At the beginning of the packet following this RF information D # 3, ID2 is described, and in the
packet following this ID information, LF information D # 2 and an error correction code are
described. The LF information D # 2 is audio information obtained by compressing an audio /
audio signal for the left front. At the beginning of the packet following the LF information D # 2,
ID1 is described, and in the packet following the ID information, bass information D # 1 and an
error correction code are described. The bass information D # 1 is audio information obtained by
compressing an audio / audio signal for the front center.
[0054]
Thus, with regard to audio information transferred from the DVD device 16, bass information D #
1, LF information D # 2, RF information D # 3, etc. for making the speaker devices # 1 to # 5
including the own device correspond. A data string in which the LR information D # 4 and the RR
information D # 5 are connected in time division is formed, and synchronization information is
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described in the last packet of this data string. The synchronization information is added by the
microcomputer 31 to reproduce and output audio information simultaneously from all the
speaker devices # 1 to # 5.
[0055]
Subsequently, the speaker devices # 2 to # 5 having the reception function will be described. The
speaker device #i (i = 2 to 5) shown in FIG. 8 has the infrared light receiving unit 27 as an
example of the receiving unit, and simultaneously receives the infrared light transmitted from the
speaker device # 1 to obtain the data string DS. Is made to receive.
[0056]
In this example, a power control switch 46 is connected to the infrared light receiving unit 27,
and a battery power source 47 is connected to the power control switch 46. The power control
switch 46 is turned on when the transfer command is detected by the infrared light receiving
unit 27, and the battery power supply 47 is supplied to the microcomputer 41, the audio
processing unit 42, and the memory unit 44. A microcomputer 41 serving as an example of a
control unit for reception is connected to the infrared light receiving unit 27 so as to perform off
control of the battery power supply 47. For example, when the power switch 45 is turned on, the
battery power source 47 is constantly supplied to the infrared light receiving unit 27, and the
standby state is established. At this time, no power is supplied to the microcomputer 41, the
audio processing unit 42 and the memory unit 44.
[0057]
When the transfer command is detected by the infrared light receiving unit 27, the power control
switch 46 is turned on by the infrared light receiving unit 27 by this detection, so that the
battery power 47 is supplied to the microcomputer 41, the audio processing unit 42 and the
memory unit 44. To be done. The microcomputer 41 detects the synchronization information and
the audio information addressed to the own device from the data string DS received by the
infrared light receiving unit 27. In this example, the microcomputer 41 is configured to calculate
the sounding timing from the header of the audio information addressed to the own device
received by the infrared light receiving unit 27. Of course, the sound generation timing may be
determined from the synchronization information received by the infrared light receiving unit 27.
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[0058]
A memory unit 44 is connected to the microcomputer 41 to record audio information addressed
to the own device detected from the data string DS. For the memory unit 44, a memory (RAM), a
read only memory (ROM), a non-volatile memory or the like which can read audio information as
needed is used. The ID information of the speaker device #i is recorded in the non-volatile
memory.
[0059]
The microcomputer 41 reads out the ID information from the memory unit 44 set in advance
when detecting the audio information addressed to the own device, and the speaker device #i of
the transmission destination described in the ID information and the header of the audio
information It is made to compare with the ID information of If the ID information matches, the
information D # i of the packet following the ID number is the audio information addressed to the
own machine, so this information D # i is transferred to the memory unit 44 and stored. If the ID
information is different, it is not the audio information addressed to the own device, so even if
the audio information is received, it is excluded from the memory storage target.
[0060]
The audio processing unit 42 is connected to the microcomputer 41, and based on the
synchronization information detected from the end of the data string DS, the compressed audio
information is read from the memory unit 44, and the audio information is expanded and
reproduced. Is done. A speaker 33 is connected to the audio processing unit 42 so that the audio
signal reproduced by the audio processing unit 42 is amplified.
[0061]
Subsequently, the sound generation timing in the speaker devices # 2 to # 5 having the reception
function will be described.
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[0062]
In FIG. 9B, the horizontal axis is time t, and the vertical axis is information captured by various
speakers # 1 to # 5.
The data sequence shown in FIG. 9A is a data sequence except for the header shown in FIG. 7,
and the RR information D # 5, LR information D # 4, RF information D # 3, LF information D # 2
and bass information D # 1. Are sequentially connected, and synchronization information is
added to the tail end, which is transmitted from the speaker device # 1 to the respective speaker
devices # 2 to # 5. The bass information D # 1 is transferred to the internal memory unit 34 for
the speaker device # 1.
[0063]
In the speaker device # 5, when the transfer command is detected, the RR information D # 5
addressed to the own device is detected, and thereafter, it is on standby until the synchronization
information is detected. The speaker devices # 1 to # 4 discard the RR information D # 5 without
capturing data.
[0064]
In the speaker device # 4, when the transfer command is detected, after discarding the RR
information D # 5, the LR information D # 4 addressed to the own device is detected, and
thereafter, it is on standby until the synchronization information is detected. The speaker devices
# 1 to # 3 discard the RR information D # 4 without capturing data.
[0065]
When the transfer command is detected in the speaker device # 3, after discarding the RR
information D # 5 and D # 4, the RF information D # 3 addressed to the own device is detected,
and thereafter, it waits until synchronization information is detected. Be done. The speaker
devices # 1 and # 2 discard the RR information D # 3 without capturing data.
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[0066]
When the transfer command is detected in the speaker device # 2, after discarding the RR
information D # 5, D # 4 and D # 3, the LF information D # 2 addressed to the own device is
detected, and then the synchronization information is detected. It will wait until it is done. The
speaker apparatus # 1 discards the LF information D # 2 without capturing data.
[0067]
For the speaker device # 1, when the transfer command is detected, after discarding the RR
information D # 5, D # 4, D # 3 and D # 2, the bass information D # 1 addressed to the own
device is transferred to the memory unit 34. Internally transferred and then wait until
synchronization information is detected. In this example, the tone generation timing is such that
the generation start time is determined several clocks after the synchronization information is
decoded. The invention is not limited to this. The sound generation timing may be calculated by
the microcomputer 41 based on the position of the header of the audio information addressed to
the player's own device as the sound generation start time ts.
[0068]
Subsequently, a control method of the surround speaker system 200 according to the present
embodiment will be described. FIG. 10 is a flowchart showing an example of control on the
reception side of the surround speaker system 200. The flowchart on the transmitting side will
be described using FIG. 2 again.
[0069]
In this embodiment, the speaker device (master device) # 1 for the center to four speaker devices
(child devices) # 2 to # 5, RR information D # 5, LR information D # 4, RF information D # 3, It is
assumed that the LF information D # 2 and the bass information D # 1 are sequentially
connected, and a data string to which synchronization information is added at the end is
transmitted. The arrangement method of each speaker device #i (i = 5) is as shown in FIG.
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[0070]
On the premise of this, on the transmission side, the speaker device # 1 at step A1 of the
flowchart shown in FIG. 2 time-divides the audio information corresponding to each of the five
speaker devices # 1 to # 5 including the own device. A data string DS connected to is created. For
example, in the microcomputer 31, by combining audio information transferred from the DVD
device 16 in time division, RR information D # 5, LR information D # 4, RF information D # 3, LF
information D # 2, and bass information A data string DS in which D # 1 is arranged is generated.
[0071]
Further, in the microcomputer 31, 1D1 is described as ID information in the header of the bass
information D # 1, 1D2 is similarly described in the header of the LF information D # 2, and ID3
is described in the header of the RF information D # 3. The LR information D # 4 describes 1D4,
and the RR information D # 5 describes 1D5.
[0072]
Thereafter, the process proceeds to step A3, where the microcomputer 31 adds synchronization
information to the end of the data string DS in which the ID information has been written.
This synchronization information is added to reproduce and output audio information
simultaneously from all the speaker devices # 1 to # 5. Then, the process proceeds to step A3,
and the data string DS to which synchronization information is added is transmitted from the
infrared light emitting unit 26 to the speaker devices # 2 to # 5 on the receiving side.
[0073]
On the other hand, on the receiving side, when the power switch 45 is turned on in step C1 of
the flowchart shown in FIG. 10, the battery power 47 is supplied to the infrared ray receiving
unit 27, and the respective speaker devices # 2 to # 5 are in the standby state. In the standby
state, in order to suppress the power consumption of the battery power supply 47, power is not
supplied to the microcomputer 41, the audio processing unit 42, the memory unit 44 and the
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like.
[0074]
Thereafter, the process proceeds to step C2, and the infrared light receiving unit 27 of each of
the speaker devices #i (i = 2 to 5) receives the data string DS. Here, when the transfer command
is detected by the infrared light receiving unit 27, the power control switch 46 is turned on by
the infrared light receiving unit 27 by this detection, and the battery power supply 47 is used as
the microcomputer 41, the audio processing unit 42 and the memory unit 44. It is made to
supply.
[0075]
Then, the process proceeds to step C3 where the microcomputer 41 detects ID information
addressed to the own machine from the data string DS received by the infrared light receiving
unit 27. At this time, the ID information is read out from the memory unit 44 set in advance, and
this ID information is compared with the ID information of the transmission destination speaker
device #i described in the header of the audio information. When the ID information matches and
the ID information addressed to the own device is detected, the audio information addressed to
the own device is described in the packet following the ID information, so the process proceeds
to step C4. If the ID information for the own machine is not detected, the process returns to step
C2 and continues to receive the data string until a predetermined time has elapsed in step C8. If
the ID information is different, it is not the audio information addressed to the own device, so
even if the audio information is received, it is removed from the memory storage target and
discarded.
[0076]
Therefore, when the ID information to the speaker device #i is detected in step C3, the process
proceeds to step C4, and audio information addressed to the own device described in the packet
following the ID information is fetched, and this is used as a memory unit Store to 44. Thereafter,
the process proceeds to step C5, and the speaker device is on standby until the other speaker
devices are ready.
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[0077]
For example, in the speaker device # 5, when the transfer command is detected, the RR
information D # 5 addressed to the own device is detected, and thereafter, it is on standby until
the synchronization information is detected. When the transfer command is detected in the
speaker device # 4, the LR information D # 4 addressed to the own device is detected, and
thereafter, it is on standby until the synchronization information is detected. In the speaker
device # 3, when the transfer command is detected, the RF information D # 3 addressed to the
own device is detected, and thereafter, the process waits until the synchronization information is
detected. When the transfer command is detected in the speaker device # 2, the LF information D
# 2 addressed to the own device is detected, and thereafter, the process waits until the
synchronization information is detected. With regard to the speaker device # 1, when the
transfer command is detected, the bass information D # 1 addressed to the own device is
internally transferred to the memory unit 34, and thereafter, the process waits until
synchronization information is detected.
[0078]
Then, the process proceeds to step C6, and the synchronization information described at the end
of the data string is detected by the microcomputer 41. This synchronization information
synchronizes the information reproduction processing in the five speaker devices # 1 to # 5.
When this synchronization information is detected, the method of determining the sound
generation timing from the synchronization information or the audio addressed to the own
device The tone generation start time ts is obtained by the method of calculating the tone
generation timing from the position of the header of the information. In step C7, music
information is reproduced and output by any of the five speaker devices # 1 to # 5 based on the
sound generation start time ts.
[0079]
For example, the audio processing unit 32 of the speaker device # 1 reads out the compressed
bass information D # 1 from the memory unit 34 based on the tone generation start time ts,
decompresses it, and reproduces the remaining four units. In the audio processing unit 42 of
each of the speaker devices # 2 to # 5, RR information D # 5, LR information D # 4, RF
information D # 3, and LF information compressed from the memory unit 44 based on the tone
generation start time ts It reads out D # 2 and the like, and decompresses and reproduces them.
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[0080]
As a result, from the speaker 23 connected to the audio processing unit 32 of the speaker device
# 1, low frequency music information obtained by expanding the bass audio signal is output.
From the speakers 33 connected to the audio processing units 42 of the speaker devices # 2 and
# 3, music information obtained by expanding the main audio signal for left and right audio front
is outputted. From the speaker 33 connected to the audio processing unit 44 of the speaker
devices # 4 and # 5, music information obtained by expanding the audio signal for left and right
audio and rear is output. Thereby, the listener 20 can listen to surround music.
[0081]
When a predetermined time has elapsed in step C8, it is determined that there is no data string
to the speaker device #i. For example, the reproduction output by the left and right rear speaker
devices # 4 and # 5 as viewed from the listener 20 is not performed. In this case, the bass
information D # 1, the LF information D # 2 and the RF information D # 3 are simultaneously
reproduced and output by the front left and right main speaker devices # 2 and # 3 and the
center speaker device # 1. Is done. When a series of reproduction processes are completed in
step C7, the process proceeds to step C9. When the user turns off the power switch 45, the
microcomputer 41 turns off the power control switch 46 and ends.
[0082]
As described above, according to the control method of the wireless speaker system 200
according to the embodiment of the present invention, when reproducing and outputting audio
information simultaneously from all the speaker devices #i, the synchronization information is
transmitted to each speaker device # 1. The five speakers can be used in common with ~ # 5, and
since they are simultaneously transmitted with the front speaker devices # 1 to # 3 when
transmitting synchronization information to the rear speaker devices # 4 and # 5. It is possible to
eliminate the time difference of sound generation between the devices # 1 to # 5.
[0083]
Therefore, it is possible to provide a high-performance wireless surround speaker system 200
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such as a small-scale surround system for general household use or a large-scale surround
system for theaters and movie theaters.
In addition, it is possible to construct inexpensively a surround system provided with a total of
five speaker devices # 1 to # 5 having a reception function with one information transmitting
device and no wiring cord at all.
[0084]
As described above, according to the speaker system of the present invention, synchronization
information is added to a data string in which audio information corresponding to each of a
plurality of speaker devices is connected in time division and transmitted. An information
transmitting apparatus is provided, and audio information is reproduced and output
simultaneously from all the speaker devices based on the synchronization information.
[0085]
With this configuration, it is possible to eliminate the time difference of sound generation
between the speaker devices, so that it is possible to construct a wireless surround speaker
system.
In addition, it is possible to inexpensively construct a surround system provided with a single
information transmission device and a plurality of speaker devices.
[0086]
According to the information transmitting apparatus of the present invention, a control unit for
generating a data string in which audio information is connected in time division for a plurality
of speaker devices with a receiving function and adding synchronization information is provided.
The added data string is transmitted to each speaker device.
[0087]
With this configuration, when reproducing and outputting audio information from all the speaker
devices simultaneously on the receiving side, the synchronization information can be commonly
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used in each speaker device, so that the time difference in sounding between the speaker devices
can be eliminated. Can.
In addition, when constructing a wireless surround speaker system, it is possible to use the
information transmission device by only having one.
[0088]
According to the speaker device of the present invention, the control unit detects the
synchronization information and the audio information addressed to the own device from the
received data string, and the control unit reproduces and outputs the audio information read
from the memory unit based on the synchronization information. To control the voice processing
unit.
[0089]
With this configuration, when the audio information is simultaneously reproduced from all the
speaker devices on the reception side, the audio signal reproduced and output by the audio
processing unit can be simultaneously amplified from the speaker by the synchronization
information.
[0090]
The present invention is extremely suitably applied to a wireless surround speaker system or the
like in which speakers are arranged to surround a listener.
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