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JP2011120267

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DESCRIPTION JP2011120267
A control device and control method for controlling a plurality of speakers are provided. An
apparatus for controlling a plurality of speakers installed at respective positions in a listening
area for reproduction in a multi-channel audio system, the apparatus comprising: a multi-channel
audio signal reproduced by the plurality of speakers An amplifier configured to amplify, at least
one sensor disposed adjacent to at least one of the plurality of speakers in the listening area for
sensing one of temperature and humidity; and a test signal A detector configured to
communicate to the controller, wherein the controller determines the relative position of the
plurality of speakers in the listening area, and the electrical characteristics of the multi-channel
audio signal To adjust. [Selected figure] Figure 1
Control device and control method for controlling a plurality of speakers
[0001]
The present invention relates to a control apparatus and method for controlling an audio signal
reproduced through a plurality of speakers, and in particular, to optimize an audio signal based
on changes in relative position of the speakers and / or environmental conditions. And a control
apparatus and control method for controlling a plurality of speakers.
[0002]
In places such as movie theaters, audio studios, concert halls, sophisticated audio and / or video
playback devices are used to play audio and / or video to the audience.
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1
With the development of television technology and the increasing availability of high definition
televisions with large screens at home, the demand for home theater audio devices is increasing.
The high-quality playback device includes a receiver for receiving an audio signal from a device
such as a DVD player capable of reading audio and video from an audio-video recording medium
such as a DVD disc. The reproduction apparatus outputs a signal for reproducing an audio-video
program to an amplifier, and the signal amplified by the amplifier is output to a speaker for
reproducing audio. In order to fully reproduce the music and surround sound recorded on the
recording medium, the speakers are strategically arranged to reproduce other aspects of the
soundtrack.
[0003]
For example, in a home theater audio reproduction system, the speakers are differently designed
to be used as center speakers, side speakers, or subwoofers. The central speaker is generally
located in the front center of the viewing or listening area, and the side speakers are located on
the side of the listening area. If the speaker is placed at a position away from the optimum
position for sound reproduction, the travel time of the signal reproduced by the speaker results
in the sound reproduction not reaching the optimum state.
[0004]
Also, environmental conditions such as temperature and / or humidity affect the speed of
movement of the audio signal. That is, speakers placed away from the optimally designed
location will affect the playback of the audio program. Also, even with speakers placed in a
position designed for optimal audio reproduction, changes in environmental conditions such as
temperature and humidity affect the time to reach the optimum audio signal, so the reproduction
of the audio signal Is less than optimal.
[0005]
The technical problem to be solved by the present invention is a system and method for
optimally reproducing an audio signal based on changes in relative position of speakers and / or
environmental conditions, and more particularly, a plurality of speakers And providing a control
device and control method for controlling the
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2
[0006]
A controller for controlling a plurality of speakers to achieve the technical task comprises: an
amplifier for amplifying a reproduction signal reproduced through the speaker; and at least one
environmental condition; At least one sensor adjacent to at least one speaker of the plurality of
speakers for outputting, the controller adjusting the reproduction signal to compensate for
changes in environmental conditions based on the sensed data Do.
The sensor senses one of temperature and humidity.
[0007]
The controller further includes a detector installed in each of the plurality of speakers to receive
a test signal output from the controller and transmit the received test signal to the controller, the
controller including: A relative position of each of the plurality of speakers is determined based
on a test signal output from each of the plurality of speakers.
[0008]
The controller generates compensation data for compensating a reproduction signal reproduced
by each of the plurality of speakers based on the relative position of each of the plurality of
speakers.
The control device further comprises a memory for storing the compensation data. The memory
stores sensed data read at a time to determine the relative position of each of the plurality of
speakers. The memory is any one of a register, an SRAM, a DRAM, and a flash memory. The
detector may be any one of an ultrasonic sensor, a speaker used as a microphone, and a
microphone.
[0009]
The test signal transmitted to the controller is a signal amplified by an amplifier before being
transmitted to the controller. The relative position is determined by the first speaker among the
plurality of speakers and determined based on the test signal reproduced by the first speaker,
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and the reproduced test signal is received by another speaker Be done.
[0010]
The sensors are respectively installed in the plurality of speakers. The sensor is installed in the
controller. The sensor senses temperature and humidity.
[0011]
A control method for controlling a plurality of speakers for achieving the technical task may
include: outputting an amplified reproduction signal reproduced through the speakers from an
amplifier; and positioning at least one of the plurality of speakers. Sensing at least one ambient
condition by a sensor and outputting the sensed data to the controller, and the reproduction
signal to compensate for the change of the ambient condition based on the sensed data. And
adjusting. The sensor senses one of temperature and humidity.
[0012]
The control method comprises the steps of: receiving the test signal output from the controller by
each of the plurality of speakers; transmitting the test signal received by each of the plurality of
speakers to the controller; Calculating relative positions of the plurality of speakers based on the
test signal transmitted from each of the speakers. The control method may further include
generating compensation data for compensating a reproduction signal reproduced by each of the
plurality of speakers based on the relative position of each of the plurality of speakers. The
control method may further include storing the compensation data in a memory.
[0013]
The control method may further comprise storing in memory a sensing data read at a time of
determining the relative position of each of the plurality of speakers. The memory is any one of a
register, an SRAM, a DRAM, and a flash memory.
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[0014]
The receiving of the test signal output from the controller may be performed by any one of an
ultrasonic sensor, a speaker used as a microphone, and a microphone. The transmitting of the
received test signal to the controller may be performed by wireless communication.
[0015]
The relative position is determined by a first speaker among the plurality of speakers and
determined based on the test signal reproduced by the first speaker, and the reproduced test
signal is received by another speaker Ru.
[0016]
The sensors are respectively installed in the plurality of speakers.
The sensor is installed in the controller. The sensor senses temperature and humidity.
[0017]
A controller for controlling a plurality of speakers for achieving the technical task includes: an
amplifier for amplifying and outputting a reproduction signal reproduced through the speakers;
and a test signal for outputting to the plurality of speakers. A controller for receiving an answer
signal returned from each of the speakers, the answer signal representing a signal received by
each of the plurality of speakers in response to the test signal output from the first speaker, The
controller determines the relative position of each of the plurality of speakers based on the
response signal, generates compensation data based on the relative position, and the
compensation data adjusts the reproduction signal. Used for
[0018]
The control device may further include a detector installed in each of the plurality of speakers,
and the detector may receive the test signal.
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The detector may be any one of an ultrasonic sensor, a speaker used as a microphone, and a
microphone.
[0019]
The controller further comprises at least one sensor disposed adjacent to at least one of the
plurality of speakers, the at least one sensor sensing and sensing at least one environmental
condition. The output data is output to the controller, and the controller adjusts the reproduction
signal to compensate for environmental changes based on the sensed data.
[0020]
The sensor senses one of temperature and humidity.
The control device further comprises a memory for storing the compensation data. The memory
is any one of a register, an SRAM, a DRAM, and a flash memory. The relative position is
determined by the first speaker among the plurality of speakers and determined based on the
test signal reproduced by the first speaker, and the reproduced test signal is received by another
speaker Be done. The sensors are respectively installed in the plurality of speakers. The sensor is
installed in the controller.
[0021]
Systems and methods consistent with the present invention can optimally reproduce audio
signals based on changes in the relative position of speakers and / or environmental conditions.
[0022]
FIG. 1 is a block diagram of an audio reproduction system according to an embodiment of the
present invention.
FIG. 3 is a block diagram of a controller of the audio reproduction system of FIG. 1; FIG. 6 is a
block diagram of an audio reproduction system according to another embodiment of the present
invention. FIG. 6 is a block diagram of an audio reproduction system according to another
embodiment of the present invention.
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[0023]
For a full understanding of the present invention and the operational advantages thereof as well
as the objectives attained by the practice of the present invention, reference should be made to
the accompanying drawings and the content of the accompanying drawings which illustrate the
preferred embodiment of the invention. You must. Hereinafter, the present invention will be
described in detail by describing preferred embodiments of the present invention with reference
to the attached drawings. Like reference symbols in the drawings indicate like elements.
[0024]
FIG. 1 is a block diagram of an audio reproduction system according to an embodiment of the
present invention. Referring to FIG. 1, the sound reproduction system 100 includes a regenerator
120, a controller 140, an amplifier 130, an interface 150, and a plurality of speakers 101-1 to
101-4 for receiving an amplified sound reproduction signal. Prepare. The player 120 is an audio
player such as a CD player or a DVD player. Also, the regenerator 120 may be a device for
reproducing a signal received from a microphone.
[0025]
The audio signal reproduced from the reproducer 120 is amplified by the amplifier 130 and
transmitted to the speakers 101-1 to 101-4 to be reproduced in the form of audible sound. Each
of the speakers 101-1 to 101-4 includes an environmental condition sensor for sensing an
environmental condition such as temperature and / or humidity.
[0026]
Environmental conditions sensed from each of the speakers 101-1 to 101-4 are transmitted to
the controller 140 as sensed data, and the controller 140 changes the audio reproduction signal
to compensate for changes in the environmental conditions. Interpret the sensed data to
determine if it needs to be done.
[0027]
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7
According to the embodiment of the present invention, each of the speakers 101-1 to 101-4
includes a transceiver for transmitting / receiving a signal.
The sensed data may be transmitted from the speaker to the controller 140 by the transceiver.
Preferably, the transceiver is an ultrasonic transceiver that transmits and receives signals
wirelessly.
[0028]
Those skilled in the art will readily recognize that sensed data may be transmitted to the
controller 140 through other known means, such as wired connections.
[0029]
The audio reproduction system 100 determines the relative distance of the speakers, and the
controller 140 determines whether or not the audio reproduction signal needs to be changed for
optimal reproduction. Use information for different distances.
[0030]
FIG. 2 is a block diagram of controller 140.
The controller 140 includes a processor 210, a calculation circuit 220, and a memory 230.
The memory 230 is preferably a ROM, a flash memory, a register or a RAM. The ROM or flash
memory may be used to store program code to be executed by the processor 210.
[0031]
The processor 210 interfaces with other functions including calculating the relative position of
the speaker based on the audio playback device including the amplifier 150 and the position
data, receiving from the position data or the sensor of the speaker Control the regeneration of
the signal based on the sensed data.
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[0032]
The register or RAM stores data such as sensed data and position data output from the speaker.
The RAM may be DRAM or SRAM. The processor 210 is preferably a digital signal processor
(DSP) capable of processing digitized audio signals with the function of a CPU.
[0033]
The calculation circuit 220 receives position data and sensing data from the speaker. A test
signal is transmitted to the first speaker 101-1 to determine the relative position of the speakers.
The test signal transmitted to the speakers 101-1 is alternately transmitted to the speakers 1012 to 101-4. From the response time of the test signal transmitted from each of the speakers 1012 to 101-4 to the speaker 101-1, the relative distance between the speaker 101-1 and each of
the speakers 101-2 to 101-4 may be determined.
[0034]
For example, if the answering time from the speaker 101-3 is longer than the answering time
from the speakers 101-2 and 101-4, the speaker 101-3 is more likely than the other speakers
101-2 and 101-4. It is further away from the speaker 101-1 or has the longest distance. Signals
(or position data) returned from the speakers 101-2 to 101-4 are transmitted to the controller
140.
[0035]
Program modules stored in memory 230 are performed by processor 210 to determine the
relative distance between the speakers based on the position data. From such a determination,
the controller 140 adjusts the actual audio reproduction signal to compensate for the difference
in position of the speakers from the optimum position.
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[0036]
For example, if it is determined that the speaker 101-3 is farther than the optimum distance, the
tone or frequency of the reproduction signal designated by the speaker 101-3 is temporarily
adjusted to compensate for the effect of the further distance. Be done.
[0037]
According to an alternative embodiment of the present invention, instead of using an ultrasonic
transceiver, the test signal is reproduced through the speaker 101-1 and the reproduced test
signal is transmitted to each speaker 101-2 to 101-4. Received by
[0038]
Each speaker 101-2 to 101-4 acts like a microphone for receiving the test signal.
If the test signal is received, the speakers 101-2 to 101-4 report reception of the test signal to
the controller 140 through the amplifier 130.
The controller 140 determines the relative distance between the speakers 101-1 and the
speakers 101-2 to 101-4 based on the signals received from the speakers 101-2 to 101-4. The
person skilled in the art clearly knows that the actual microphone in the receiving speaker is
used as a detector for detecting the test signal.
[0039]
Referring to FIGS. 1 and 2, the controller 140 may be configured to compensate data for
adjusting an audio reproduction signal based on the position data or an arrival time of a signal
received from each of the speakers 101-2 to 101-4. Generate The compensation data is
transmitted to the amplifier 130 to change the volume, delay, phase, etc. of the signal transmitted
to each of the speakers 101-2 to 101-4. The compensation data may be stored in the memory
230 or may be directly transmitted to the amplifier 130.
[0040]
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10
Also, an environmental sensor disposed in each of the speakers 101-1 to 101-4 periodically
transmits sensed data such as temperature and / or humidity to the controller 140. The sensed
data may be stored in the memory 230 of the controller 140, and the controller 140 may detect
the change of a preset environmental condition, for example, a temperature of 5.degree. C. or
5.degree. F. The audio playback signal is adjusted to compensate for environmental conditions.
For example, a change of temperature 5 ° C. or 5 ° F. requires an adjustment of 0.5 seconds in
time to the signal specified for the speaker.
[0041]
FIG. 3 is a block diagram of an audio reproduction system according to another embodiment of
the present invention. Instead of each speaker 101-1 to 101-4 being equipped with an
environmental sensor, the environmental sensor of FIG. 3 is installed only on one of the speakers
101-1 to 101-4, for example, the speaker 201-1. . The sensed signal is transmitted to the
controller 140 by the sensor of the speaker 201-1 and each of all the speakers 201-1 to 201-4 is
adjusted based on the environmental conditions.
[0042]
The sound reproduction system 250 according to the present invention is applied to a system in
which the environmental conditions have speakers installed at essentially the same place for all
the speakers 201-1 to 201-4.
[0043]
FIG. 4 is a block diagram of an audio reproduction system according to another embodiment of
the present invention.
Referring to FIG. 4, the environmental sensor is not installed anywhere in the speakers 251-1 to
251-4, but installed adjacent to the speakers 251-1 to 251-4. The environmental sensor may be
installed in the controller 140. The controller 140 adjusts the sound reproduction signal based
on unusual environmental conditions, such as temperature and / or humidity, sensed by the
environmental sensor.
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[0044]
Although the present invention has been described based on an embodiment shown in the
attached drawings, this is merely an example, and it is possible for a person skilled in the art to
make various modifications and other equivalent embodiments. It is. Accordingly, the true
technical scope of the present invention should be determined solely by the appended claims.
[0045]
Systems and methods such as those described above may be used for audio playback devices
such as CD players or DVD players.
[0046]
DESCRIPTION OF SYMBOLS 100 audio reproduction system 101-1 to 101-4 speaker 120
regenerator 130 amplifier 140 controller 150 interface
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