close

Вход

Забыли?

вход по аккаунту

?

JP2007013707

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 JP2007013707
A wireless speaker system is provided that can easily synchronize the phase of reproduced sound
from each speaker device. A distance to each of a plurality of wireless speaker devices 3 is
measured using a wireless method used for transmitting an audio signal, and reproduced sounds
of the plurality of wireless speaker devices 3 are listened to based on the measured distances. By
delaying each audio signal so as to synchronize in position, it is possible to easily synchronize the
phase of reproduced sound from a plurality of wireless speaker devices with a simple
configuration. [Selected figure] Figure 1
Wireless speaker system, audio signal transmitting apparatus, reproduced sound phase
synchronization apparatus, reproduced sound phase synchronization method and reproduced
sound phase synchronization program
[0001]
The present invention relates to a wireless speaker system, an audio signal transmitting
apparatus, a reproduction sound phase synchronization apparatus, a reproduction sound phase
synchronization method, and a reproduction sound phase synchronization program, in which an
audio signal is wirelessly transmitted to a plurality of speaker apparatuses and reproduced. It is
suitable to apply to
[0002]
BACKGROUND In recent years, a wireless speaker system configured to transmit an audio signal
output from an amplifier or the like to a wireless speaker device via radio waves or infrared rays
09-05-2019
1
has been put to practical use (see, for example, Patent Document 1).
JP, 2004-336252, A
[0003]
In such a wireless speaker system, since the speaker cable is unnecessary, it is conceivable to
store the wireless speaker device in a press-in or the like when not in use and install the wireless
speaker device in an appropriate place only when in use. In addition, it is also conceivable to
construct a temporary wireless speaker system using the wireless speaker device brought by
each person.
[0004]
However, in such a case, since the installation position of each wireless speaker device can not be
determined, there is a problem that the phases of reproduced sound from each wireless speaker
device at the listening position can not be aligned.
[0005]
In order to synchronize the reproduction sound phase from such a plurality of speaker devices, a
sound collecting means such as a microphone is disposed at the user's listening position, and a
specific sound is sequentially reproduced from each speaker device, and the sound collecting
means There has been proposed a method of synchronizing the reproduced sound phase at the
listening position by delaying the reproduced sound from each of the speaker devices according
to the time difference to reach.
[0006]
However, such a synchronization method of the reproduction sound phase requires a separate
sound collecting means and the structure becomes complicated, and when calculating the delay
time, it is necessary to reproduce the above-mentioned specific voice. There was a problem that
the listening of music etc. had to be interrupted.
[0007]
The present invention has been made in consideration of the above points, and an object of the
present invention is to propose a wireless speaker system capable of easily synchronizing the
09-05-2019
2
phase of reproduced sound from each speaker device.
[0008]
In order to solve such problems, in the present invention, a plurality of wireless speaker devices
that receive an audio signal using a predetermined wireless system and output the received audio
signal as a reproduced sound, and each of the plurality of wireless speaker devices And an audio
signal transmitting device for transmitting an audio signal using a wireless method, and remote
control of the audio signal transmitting device using a wireless method, and measuring a distance
to each of a plurality of wireless speaker devices using the wireless method. The wireless speaker
device based on the distance to the remote controller having the distance means, the delay
means for delaying the audio signal for each of the plurality of wireless speaker devices by an
individual delay time, and the measured each of the plurality of wireless speaker devices The
phase of the playback sound output from each So as to synchronize the position of the controller,
provided the delay time calculating means for calculating the delay time for a plurality of
wireless speaker devices respectively to the wireless speaker system.
[0009]
The distance to each of the plurality of wireless speaker devices is measured using a wireless
method used for transmitting an audio signal, and based on the measured distance, the
reproduced sound of each of the plurality of wireless speaker devices is synchronized at the
listening position. By delaying each audio signal, it is possible to easily synchronize the phase of
the reproduced sound from the plurality of wireless speaker devices with a simple configuration.
[0010]
According to the present invention, the distance to each of the plurality of wireless speaker
devices is measured using a wireless method used for transmitting an audio signal, and the
reproduced sound of each of the plurality of wireless speaker devices is heard based on the
measured distance. By delaying each audio signal so as to be synchronized in position, it is
possible to realize a wireless speaker system capable of easily synchronizing the phase of
reproduced sound from a plurality of wireless speaker devices with a simple configuration.
[0011]
An embodiment of the present invention will now be described in detail with reference to the
drawings.
[0012]
09-05-2019
3
(1) Overall Configuration of Wireless Speaker System In FIG. 1, reference numeral 1 generally
indicates a wireless speaker system to which the present invention is applied, which includes a
wireless amplifier 2, a plurality of wireless speaker devices 3, and a remote controller (remote
control) 4. Be done.
The wireless amplifier 2, the wireless speaker device 3, and the remote controller 4 form an ad
hoc network by using radio waves of the UWB (Ultra Wideband) system based on the IEEE
802.15.3a standard, and communicate with each other.
The UWB system is a wireless communication system that uses a very wide frequency band using
pulse waves of 1 [ns] or less, and can perform high-speed communication at a distance of about
10 [m], and the arrival time of pulse waves The distance between UWB devices can be measured
in units of several [cm] based on
[0013]
The wireless amplifier 2 as an audio signal transmission device operates according to a control
command according to the user operation transmitted from the remote control 4 and transmits
an audio signal supplied from an external audio device (not shown) through the UWB wave.
Transmit to the corresponding wireless speaker device 3.
Each wireless speaker device 3 reproduces an audio signal received from the wireless amplifier 2
respectively.
[0014]
As described above, in the wireless speaker system 1, an audio signal is transmitted between the
wireless amplifier 2 and the wireless speaker device 3 via wireless (UWB wave), so that it is
possible to use a conventional wired speaker device. In comparison, it is possible to move and
add speakers more easily.
[0015]
FIG. 2 shows the configuration of the wireless amplifier 2. The control unit 10 performs the
09-05-2019
4
entire wireless amplifier 2 in accordance with a user operation input via the operation unit 11
and a control signal from the wireless speaker device 3 received via the transmission / reception
unit 13. Control.
[0016]
The signal processing unit 12 performs various processes such as volume adjustment and sound
quality adjustment on audio signals of one or a plurality of channels supplied from an external
audio device according to the control of the control unit 10 and supplies the processed signals to
the transmitting / receiving unit 13 .
[0017]
The transmission / reception unit 13 is a UWB device based on the IEEE 802.15.3a standard, and
performs broadband high-speed wireless communication using pulse waves of 1 [ns] or less
according to the UWB method between each wireless speaker device 3 and the remote control 4 .
The transmission / reception unit 13 of the wireless amplifier 2 transmits the audio signal of one
or more channels supplied from the signal processing unit 12 to the corresponding wireless
speaker device 3 via the UWB wave.
[0018]
FIG. 3 shows the configuration of the wireless speaker device 3, and a transmission / reception
unit 21, a signal processing unit 22, and a signal delay unit 23 are connected to the control unit
20.
The transmission / reception unit 21 is a UWB device based on the IEEE 802.15.3a standard,
performs wireless communication with the wireless amplifier 2 and the remote control 4
according to the UWB system, and transmits an audio signal transmitted from the wireless
amplifier 2 via the UWB wave. The signal is received and supplied to the signal processing unit
22.
09-05-2019
5
[0019]
The signal processing unit 22 amplifies the received voice signal, and outputs the voice signal
from the speaker 24 via the signal delay unit 23.
[0020]
FIG. 4 shows the configuration of the remote controller 4. The control unit 30 generates a control
signal according to a user operation input via the operation unit 31 and supplies the control
signal to the transmission / reception unit 32.
The transmission / reception unit 32 is a UWB device based on the IEEE 802.15.3a standard, and
transmits the control signal supplied from the control unit 30 to the wireless amplifier 2 via the
UWB wave.
[0021]
In addition to this configuration, the remote control 4 is provided with a distance measuring unit
33 which is a feature of the present invention.
The distance measuring unit 33 utilizes the distance measuring function of the transmitting /
receiving unit 32 formed of a UWB device, and based on the time when the pulse of the UWB
wave transmitted from the transmitting / receiving unit 32 is received by each wireless speaker
device 3, The distances to the wireless speaker device 3 are respectively measured, and supplied
to the control unit 30 as distance information.
[0022]
Here, since the remote control 4 is used by the user of the wireless speaker system 1 at hand, the
position of the remote control 4 substantially matches the position of the user.
For this reason, in the wireless speaker system 1, based on the distance information of each of
the wireless speaker devices 3 measured by the distance measuring unit 33, the reproduction
09-05-2019
6
sound reproduced from each of the wireless speaker devices 3 is individually delayed to listen to
the user. The phase of the reproduced sound from each wireless speaker device 3 at the position
is synchronized.
[0023]
That is, based on the distance information about each wireless speaker device 3 measured by the
distance measuring unit 33, the control unit 30 refers to the wireless speaker device 3 farthest
from the remote control 4 (this is referred to as a reference speaker device 3X). Based on the
distance difference between the distance information Lx of the reference speaker device 3x and
the distance information Ld of each of the other wireless speaker devices 3 (referred to as the
delay speaker device 3d), the following equation is used in each delay speaker device 3d The
reproduction delay time td is calculated.
However, let v be the speed of sound.
[0024]
td=(Ld−Lx)/v ……(1)
[0025]
The control unit 30 transmits the reproduction delay time td thus calculated to the
corresponding wireless speaker device 3 via the transmission / reception unit 32 as delay time
information.
The control unit 30 transmits the reproduction delay time td as "0" to the reference speaker
device 3X.
[0026]
The control unit 20 (FIG. 3) of each wireless speaker device 3 controls the signal delay unit 23
based on the delay time information transmitted from the remote controller 4 and reproduces
the audio signal supplied from the signal processing unit 22 to the speaker 24. Delay by delay
time td.
09-05-2019
7
[0027]
In the wireless speaker system 1, the user moves to change the listening position or the
installation position of the wireless speaker device 3 by repeating the distance measurement with
respect to each wireless speaker device 3 described above at every predetermined time (real time
distance measurement). Even if it is changed, the reproduction delay time td for each wireless
speaker device 3 can be changed rapidly to always match the phase of the reproduced sound at
the listening position.
[0028]
(2) Reproduction sound phase synchronization processing procedure Next, the processing
procedure in the remote control 4 and the wireless speaker device 3 for performing
synchronization of the reproduction sound phase described above will be described in detail
using the flowchart shown in FIG.
[0029]
The control unit 30 (FIG. 4) of the remote controller 4 enters from the start step of the
reproduction sound phase synchronization processing procedure RT1, moves to step SP1,
measures the distance between each wireless speaker 3, and moves to next step SP2.
[0030]
In step SP2, the control unit 30 determines whether the distance information Ld for each of the
wireless speakers 3 has changed.
If it is determined in step SP2 that the distance information Ld for all the wireless speakers 3 has
not changed, the control unit 30 returns to step SP1 and performs distance measurement again.
[0031]
On the other hand, when it is determined in step SP2 that the distance information Ld of the
wireless speaker 3 has changed, the control unit 30 proceeds to the next step SP3.
09-05-2019
8
Since the distance information Ld of each wireless speaker 3 is calculated for the first time
immediately after the start of the reproduction sound phase synchronization processing
procedure RT1, in this case, the control unit 30 always determines that all the distance
information Ld has changed. Move to SP3.
[0032]
In step SP3, the control unit 30 calculates the reproduction delay time td based on the changed
distance information Ld, and proceeds to the next step SP4.
In step SP4, the control unit 30 transmits the calculated reproduction delay time td as the delay
time information to the corresponding wireless speaker device 3, and returns to step SP1.
[0033]
On the other hand, the control unit 20 (FIG. 3) of the wireless speaker device 3 enters from the
start step of the reproduction sound phase synchronization processing procedure RT2, moves to
step SP11, waits for delay time information from the remote control 4, and receives the delay
time information Then, it moves to the next step SP12.
[0034]
In step SP12, the control unit 20 delays the audio signal supplied to the speaker 24 by the
reproduction delay time td indicated by the delay time information, and returns to step SP11 to
wait for the next delay time information.
[0035]
The control unit 30 of the remote controller 4 and the control unit 20 of the wireless speaker
device 3 synchronize the phase of the reproduced sound at the listening position in real time by
constantly repeating the above-described processing.
[0036]
(3) Operation and Effect In the above configuration, in the wireless speaker system 1, the
wireless amplifier 2, the wireless speaker device 3, and the remote control 4 are respectively
provided with UWB transceivers, and the voice from the wireless amplifier 2 to the wireless
09-05-2019
9
speaker device 3 The signal and the control signal from the remote controller 4 to the wireless
amplifier 2 are transmitted and received via the UWB wave, and the distance between the remote
controller 4 and each wireless speaker device 3 is measured as needed using the UWB wave.
[0037]
Then, in the wireless speaker system 1, the reproduction delay time td is calculated based on the
measured distance information Ld for each wireless speaker device 3, and each wireless speaker
device 3 is reproduced by delaying the audio signal by the reproduction delay time td. By doing
this, it is possible to always synchronize the reproduced sound phase from each wireless speaker
3 at the position of the remote control 4, that is, the listening position of the user.
[0038]
Here, in the wireless speaker system 1, the distance of each wireless speaker device 3 is
measured by using the transmission / reception unit of the UWB method for transmitting /
receiving an audio signal or a control signal, so that reproduction using a conventional
microphone is performed. A sound collecting means such as a sound phase synchronization
method is not necessary, and the reproduction sound phase can be synchronized in real time
while reproducing any sound of the user.
[0039]
In the wireless speaker system 1, when the user moves and the listening position is changed,
when the installation position of the wireless speaker device 3 is changed, and even when a new
wireless speaker device 3 is added, any time The reproduction delay time td of each wireless
speaker device 3 can be updated to always synchronize the reproduction sound phase at the
listening position.
[0040]
According to the above configuration, the transmitting / receiving unit of the UWB system
provided in the wireless amplifier 2, the wireless speaker device 3 and the remote control 4
transmits and receives audio signals and control signals, and the distance between the remote
control 4 and each wireless speaker device 3 By performing ranging at any time and controlling
the reproduction delay time of each wireless speaker device 3 according to this distance, the
phase of the reproduced sound from each wireless speaker device 3 can be easily synchronized
with a simple configuration. be able to.
[0041]
09-05-2019
10
(4) Other Embodiments In the above-described embodiment, the remote controller 4 measures
distance information on each wireless speaker device 3 and calculates a reproduction delay time
td to transmit to each wireless speaker device 3, Although each wireless speaker device 3 delays
and outputs an audio signal, the present invention is not limited to this, and transmits each
distance information measured by the remote controller 4 to the wireless amplifier, and the
reproduction delay time on the wireless amplifier side And the delay of the audio signal may be
performed.
[0042]
FIG. 6 shows the wireless amplifier 52 in such a case, and the same configuration as the wireless
amplifier 2 shown in FIG. 2 is provided except that the signal delay unit 53 is provided between
the signal processing unit 12 and the transmitting / receiving unit 13. Have.
The description of the remote controller 4 will be omitted because there is no change in the
configuration.
[0043]
The control unit 13 receives the distance information about each wireless speaker device 3
transmitted from the remote control 4 from the transmitting / receiving unit 13, and calculates
the reproduction delay time td for each wireless speaker device 3 based on the distance
information.
[0044]
Then, the control unit 13 controls the signal delay unit 53 based on the calculated reproduction
delay time td, delays the audio signal for each wireless speaker device 3 by the reproduction
delay time td, and transmits the signal via the transmission / reception unit 13.
In this case, since the audio signal has already been delayed when it is transmitted from the
wireless amplifier 52, the signal delay unit of the wireless speaker device 3 becomes
unnecessary.
09-05-2019
11
[0045]
In the above embodiment, although the case where the UWB device based on the IEEE 802.15.3a
standard is applied to each transmission / reception unit has been described, the present
invention is not limited to this, and various other data communication and distance measurement
may be performed. The wireless communication method of may be applied to each transmission
/ reception unit.
[0046]
FIG. 1 is a block diagram showing a configuration of a wireless speaker system according to an
embodiment of the present invention.
It is a block diagram showing composition of a wireless amplifier.
It is a block diagram which shows the structure of a wireless speaker apparatus.
It is a block diagram showing composition of a remote control.
It is a flowchart which shows a reproduction | regeneration sound phase synchronization process
procedure.
It is a block diagram which shows the structure of the wireless amplifier of other embodiment.
Explanation of sign
[0047]
DESCRIPTION OF SYMBOLS 1 ...... Wireless speaker system, 2 ...... Wireless amplifier, 3 ......
Wireless speaker apparatus, 4 ...... Remote control, 10, 20, 30 ...... Control part, 11, 31 ......
Operation part, 12, 22 ...... Signal processing Sections 13, 21, 32 ... Transmission / reception
section, 23 ... Signal delay section, 24 ... Speaker, 33 ... Ranging section.
09-05-2019
12
Документ
Категория
Без категории
Просмотров
0
Размер файла
21 Кб
Теги
jp2007013707
1/--страниц
Пожаловаться на содержимое документа