WO2017138182A1 - ワイヤレスオーディオシステム、コントローラ、ワイヤレススピーカ、およびコンピュータで読み取り可能なプログラム - Google Patents

ワイヤレスオーディオシステム、コントローラ、ワイヤレススピーカ、およびコンピュータで読み取り可能なプログラム Download PDF

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Publication number
WO2017138182A1
WO2017138182A1 PCT/JP2016/076893 JP2016076893W WO2017138182A1 WO 2017138182 A1 WO2017138182 A1 WO 2017138182A1 JP 2016076893 W JP2016076893 W JP 2016076893W WO 2017138182 A1 WO2017138182 A1 WO 2017138182A1
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WIPO (PCT)
Prior art keywords
wireless
output
controller
wireless speaker
radio wave
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PCT/JP2016/076893
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English (en)
French (fr)
Japanese (ja)
Inventor
康至 前田
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D&M Holdings Inc
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D&M Holdings Inc
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Priority to US16/076,029 priority Critical patent/US10587968B2/en
Priority to EP16889883.1A priority patent/EP3416411A4/en
Publication of WO2017138182A1 publication Critical patent/WO2017138182A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
    • H04R29/002—Loudspeaker arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones

Definitions

  • the present invention relates to a wireless speaker control technology.
  • Patent Document 1 discloses a wireless audio system including a plurality of wireless speakers classified into a plurality of groups and capable of reproducing different music data for each group.
  • a wireless audio system for each group, a plurality of wireless speakers belonging to the group perform arbitration, and one wireless speaker is selected from these wireless speakers. Then, the selected wireless speaker serves as a group leader, receives operations from a user for a plurality of wireless speakers belonging to the same group, and transmits a control signal to these wireless speakers.
  • this wireless audio system for example, by setting a plurality of wireless speakers in each of a plurality of rooms and setting the wireless speakers installed in the same room to the same group, different music data is reproduced for each room. be able to.
  • Patent Document 2 discloses a wireless communication system that can acquire accurate position information and can construct a communication system with reduced costs.
  • the distance to the wireless device is measured based on the received radio wave intensity of the wireless signal output from the wireless device.
  • the distance from each speaker to the listener can be measured by applying the technique described in Patent Document 2 to the wireless audio system described in Patent Document 1. That is, the distance from the listener to each speaker can be measured by detecting the received radio wave intensity of the radio signal output from each speaker by the controller carried by the listener. Then, by adjusting the output level and output timing of each speaker according to the distance from the listener to each speaker, the complexity of the setting work can be eliminated.
  • the way of sound transmission (delay time, input / output ratio) differs depending on the wall layout, the presence of obstacles, the direction of the speaker, and the like. For this reason, if the output level and output timing of each speaker are adjusted according to the distance from the listener to each speaker, the audio signal output from each speaker may not be optimal at the listening position.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to adjust each speaker so as to obtain an optimum audio signal at a listening position when outputting audio signals of the same source from a plurality of speakers. It is to provide the technology that can.
  • the audio signal output from the wireless speaker is collected by the microphone of the controller carried by the listener, the output time of the audio signal from the wireless speaker and the audio to the microphone of the controller are collected.
  • a process of measuring a delay time which is a difference from the signal input time, is performed on a plurality of wireless speakers that output audio signals of the same source, and the delay time of the audio signal of each wireless speaker is measured. Then, the output timing of each wireless speaker is adjusted based on these delay times.
  • the process of measuring the input / output ratio which is the ratio between the output level of the audio signal from the wireless speaker and the input level of the audio signal to the microphone of the controller, is applied to a plurality of wireless speakers that output audio signals of the same source.
  • the audio signal input / output ratio of each wireless speaker may be measured.
  • the output level of each wireless speaker may be adjusted.
  • the selected wireless speaker may be excluded from a group of wire speakers that output audio signals of the same source.
  • a wireless speaker that detects the relative position of these wireless speakers with respect to the controller and outputs the audio signal of the same source based on the received radio wave intensity of the wireless signals output by a plurality of wireless speakers that output the audio signal of the same source.
  • Audio signal output modes such as a stereo mode and a surround mode may be determined based on the number and the relative position.
  • the present invention is a wireless audio system comprising a plurality of wireless speakers and a controller for remotely operating the plurality of wireless speakers, Each of the plurality of wireless speakers is In accordance with a test instruction received from the controller, a test signal that is a predetermined audio signal is output to notify the output time of the test signal to the controller, or at the time specified by the test instruction Test signal output means for outputting Output adjustment means for adjusting the output timing of the audio signal to be reproduced in accordance with the output adjustment instruction received from the controller;
  • the controller is A microphone for collecting the test signal; Transmitting the test instruction to each of the plurality of wireless speakers, causing the wireless speaker to output the test signal, collecting the test signal with the microphone, and outputting the test signal received from the wireless speaker Measuring means for measuring a delay time which is a difference between a time or an output time of the test signal designated by the test instruction and an input time of the test signal to the microphone; Determining means for determining an output timing of each of the plurality of wireless speakers based on
  • the audio signal output from the wireless speaker is collected by the microphone of the controller carried by the listener, and the difference between the output time of the audio signal from the wireless speaker and the input time of the audio signal to the controller microphone is obtained.
  • a process of measuring a certain delay time is performed for each of a plurality of wireless speakers that output audio signals of the same source, and the output timing of each wireless speaker is adjusted based on the delay time of the audio signal of each wireless speaker.
  • each wireless speaker can be adjusted to be an optimal audio signal at the listening position so that the audio signal output from each wireless speaker reaches the listening position at the same timing.
  • FIG. 1 is a schematic configuration diagram of a wireless audio system according to the first embodiment of the present invention.
  • FIG. 2 is a flowchart for explaining the operation of the wireless audio system according to the first embodiment of the present invention.
  • FIG. 3 is a flowchart for explaining the operation of the wireless audio system according to the first embodiment of the present invention, and is a continuation of FIG.
  • FIG. 4 is a flowchart for explaining the operation of the wireless audio system according to the first embodiment of the present invention, and is a continuation of FIG.
  • FIGS. 5A and 5B are diagrams for explaining a method of determining a reference coordinate system for specifying the installation position of the wireless speaker 1.
  • FIG. 6B are diagrams for explaining a method of specifying the positions of the grouped wireless speakers 1 other than the first and second wireless speakers.
  • FIG. 7 is a diagram showing a display screen example of the installation state of the controller 2 and grouped wireless speakers 1-a to 1-d for accepting designation of the front direction from the user.
  • FIG. 8 is a schematic functional configuration diagram of the wireless speaker 1.
  • FIG. 9 is a flowchart for explaining the operation of the wireless speaker 1.
  • FIG. 10 is a schematic functional configuration diagram of the controller 2.
  • FIG. 11 is a flowchart for explaining the operation of the controller 2.
  • FIG. 12 is a flowchart for explaining the grouping process (S221) shown in FIG.
  • FIG. 13 is a flowchart for explaining the output characteristic adjustment processing (S222) shown in FIG.
  • FIG. 14 is a flowchart for explaining the output mode setting process (S223) shown in FIG.
  • FIG. 15 is a flowchart for explaining the operation of the wireless audio system according to the second embodiment of the present invention.
  • FIG. 16A is a diagram for explaining a method of determining a reference coordinate system for specifying the installation position of the wireless speaker 1 ′
  • FIG. 16B shows a group other than the first wireless speaker. It is a figure for demonstrating the position specification method of the digitized wireless speaker 1 '.
  • FIGS. 17A and 17B are diagrams for explaining a method for specifying the positions of grouped wireless speakers 1 ′ other than the first wireless speaker.
  • FIG. 18 is a schematic functional configuration diagram of the wireless speaker 1 ′.
  • FIG. 19 is a schematic functional configuration diagram of the controller 2 ′.
  • FIG. 20 is a flowchart for explaining the output mode setting process (S223 ') of the controller 2'.
  • FIG. 1 is a schematic configuration diagram of a wireless audio system according to the present embodiment.
  • the wireless audio system includes a plurality of wireless speakers 1-a to 1-k (hereinafter also simply referred to as wireless speakers 1) that reproduce and output audio signals of music data, and a wireless And a controller 2 for remotely operating the speaker 1.
  • the wireless speakers 1-a to 1-d are installed in the room A
  • the wireless speakers 1-e and 1-f are installed in the room B
  • the wireless speakers 1-g and 1-h are installed in the room C.
  • the wireless speakers 1-i to 1-k are installed in the D room.
  • the wireless speaker 1 follows the audio signal output characteristics (output timing, output level) set by the controller 2 and the audio signal output mode (stereo mode, 2.1 channel mode, 4 channel mode, etc.). Is played and output.
  • Controller 2 groups wireless speakers 1 installed in the same room as wireless speakers 1 that output audio signals of the same music data, and sets the output characteristics and output mode of each wireless speaker 1 belonging to the group. Further, the controller 2 transmits the music data to be reproduced to each wireless speaker 1 belonging to the group.
  • FIGS. 2 to 4 are flowcharts for explaining the operation of the wireless audio system according to the present embodiment.
  • a case where the listener carrying the controller 2 sets the output characteristics and output modes of the wireless speakers 1-a to 1-d installed in the A room is described as an example.
  • Each wireless speaker 1 periodically transmits a beacon signal including an ID assigned to the wireless speaker 1 by radio.
  • the controller 2 receives an environment setting instruction of the wireless audio system from a listener in the room A carrying the controller 2, the controller 2 receives a beacon signal transmitted from each wireless speaker 1 and detects the received radio wave intensity. (S10).
  • the beacon signals of all the wireless speakers 1-a to 1-k are received and the received radio wave strengths are detected.
  • the controller 2 delays until the audio signal output from the wireless speaker 1 reaches the controller 2 (listener listening position). And the input / output ratio of the signal level is measured (S11a to S11k). Specifically, the controller 2 transmits a test instruction with designation of an output time and an output level to the wireless speaker 1 (S110). In response, the wireless speaker 1 outputs a test signal, which is a predetermined audio signal, at the output level specified by the test instruction at the output time specified by the test instruction (S111). The controller 2 collects the test signal output from the wireless speaker 1 with a built-in microphone, and detects the input time and input level of the test signal to the microphone.
  • a delay time (input time ⁇ output time) that is a difference between the output time specified by the test instruction and the input time to the microphone is measured, and the ratio between the output level specified by the test instruction and the input level to the microphone is measured.
  • the input / output ratio (input level / output level) is measured (S112). This processing (S110 to S112) is performed in order for each of the wireless speakers 1-a to 1-k that have received the beacon signal.
  • the controller 2 uses the wireless speaker 1-a installed in the room A where the listener carrying the controller 2 is present. ⁇ 1-d is specified, and these wireless speakers 1-a to 1-d are grouped as wireless speakers 1 that output audio signals of the same music data (S12). Since test signals from wireless speakers 1-e to 1-k installed in different rooms (Room B to Room D) are input to the microphone of the controller 2 through walls or the like, the same room (Room A) ) Is greatly attenuated as compared with the test signals from the wireless speakers 1-a to 1-d set in (1).
  • wireless speakers 1 having an input / output ratio in which the ratio (input / output ratio / reference ratio) to the reference ratio is a predetermined value (for example, 0.9) or more are placed in the same room Grouped as installed wireless speakers 1.
  • the controller 2 determines the output characteristics of the wireless speakers 1-a to 1-d using the delay times and input / output ratios of the test signals of the grouped wireless speakers 1-a to 1-d.
  • the maximum delay time is set as a reference time, and for each wireless speaker 1, the value obtained by subtracting the reference time from the delay time (delay time ⁇ reference time) is the output timing of the audio signal of the music data reproduced by the wireless speaker 1.
  • the maximum input / output ratio is set as a reference ratio, and for each wireless speaker 1, a value obtained by dividing the reference ratio by the input / output ratio (reference ratio / input / output ratio) is multiplied by the output level specified in the test instruction. The output level of the audio signal of the music data reproduced by the wireless speaker 1 is used.
  • the controller 2 transmits an output adjustment instruction including designation of the output timing and output level determined as described above to each of the grouped wireless speakers 1-a to 1-d (S14). .
  • the wireless speakers 1-a to 1-d adjust the output characteristics of the audio signal of the music data (S15a to S15d). Specifically, the audio signal of the reproduced music data is buffered and delayed by the output timing specified by the output adjustment instruction, and then adjusted so that it is output at the output level specified by the output adjustment instruction. To do.
  • the controller 2 selects two wireless speakers 1 from the grouped wireless speakers 1-a to 1-d, and sets these wireless speakers 1 as the first and second wireless speakers. For example, two wireless speakers 1 are selected in order from the highest received radio wave intensity of the beacon signal, and these are set as the first and second wireless speakers.
  • the wireless speaker 1-a having the highest received radio wave intensity of the beacon signal is set as the first wireless speaker
  • the second highest wireless speaker 1-b is set as the second wireless speaker.
  • the controller 2 transmits a radio wave detection instruction including the designation of the ID of the wireless speaker 1-b set as the second wireless speaker to the wireless speaker 1-a set as the first wireless speaker (S16). ).
  • the first wireless speaker 1-a When the first wireless speaker 1-a receives the radio wave detection instruction from the controller 2, the first wireless speaker 1-a receives a beacon signal including the designation of the ID of the second wireless speaker 1-b designated by the radio wave detection instruction, The received radio wave intensity Wab is detected (S17). Then, the received radio wave information including the detected received radio wave intensity is transmitted to the controller 2 (S18).
  • the controller 2 Upon receiving the received radio wave information from the first wireless speaker 1-a, the controller 2 receives the received radio wave intensity included in the received radio wave information (the second wireless speaker detected by the first wireless speaker 1-a). 1-b beacon signal received radio wave intensity Wab), the received radio wave intensity Wa of the first wireless speaker 1-a detected by the controller 2 and the beacon signal of the second wireless speaker 1-b. Using the received radio wave intensity Wb, a reference coordinate system for specifying the installation positions of the grouped wireless speakers 1-a to 1-d is determined (S19).
  • FIG. 5A and FIG. 5B are diagrams for explaining a method of determining a reference coordinate system for specifying the installation position of the wireless speaker 1.
  • the controller 2 detects one of the received radio wave intensities of the beacon signals of the first and second wireless speakers 1-a and 1-b detected by the controller 2 (here, The received radio wave intensity Wa) of the beacon signal of the first wireless speaker 1-a is set as the reference intensity S.
  • the reference intensity S is divided by the received radio wave intensity Wa of the beacon signal of the first wireless speaker 1-a detected by the own controller 2, and the result S / Wa is obtained as the own controller 2 and the first wireless speaker.
  • the distance between 1-a is further, the reference strength S is divided by the received radio wave strength Wb of the beacon signal of the wireless speaker 1-b detected by the own controller 2, and the result S / Wb is obtained from the own controller 2 and the second wireless speaker 1-b.
  • the reference intensity S is divided by the received radio wave intensity Wab of the beacon signal of the second wireless speaker 1-b detected by the first wireless speaker 1-a.
  • S / Wab is obtained as the first wireless speaker.
  • the distance between 1-a and the second wireless speaker 1-b is obtained.
  • the relative positions of the controller 2, the first wireless speaker 1-a, and the second wireless speaker 1-b are specified, and these are defined as apexes.
  • the inner angle verex: inner angle ⁇ of the controller 2, vertex: inner angle ⁇ of the first wireless speaker 1-a, vertex: inner angle ⁇ of the second wireless speaker 1-b) is obtained.
  • the controller 2 sets its own controller 2 to the origin (0, 0) as shown in FIG. Then, by setting the first wireless speaker 1-a side as the plus side and setting a straight line passing through the controller 2 and the first wireless speaker 1-a as the Y axis, a reference coordinate system (XY orthogonal coordinate system) To decide. Then, the position of the first wireless speaker 1-a is converted to the position (0, S / Wa) on the reference coordinate system, and the position of the second wireless speaker 1-b is changed to the position (( S / Wb) sin ⁇ , (S / Wb) cos ⁇ ).
  • a reference coordinate system XY orthogonal coordinate system
  • the controller 2 determines the reference coordinate system as described above, the controller 2 performs the first and second wireless speakers 1-a and 1-b on the first and second wireless speakers 1-b, respectively.
  • a radio wave detection instruction including designation of IDs of grouped wireless speakers 1-c and 1-d other than the wireless speakers 1-a and 1-b is transmitted (S20).
  • the first wireless speaker 1-a When receiving the radio wave detection instruction from the controller 2, the first wireless speaker 1-a receives the beacon signal including the ID of the wireless speaker 1-c designated by the radio wave detection instruction and the ID of the wireless speaker 1-d. Each of the received beacon signals is received, and the received radio wave intensity is detected (S21). Then, the reception radio wave information including the reception radio wave intensity of each beacon signal of each of the wireless speakers 1-c and 1-d is transmitted to the controller 2 (S22).
  • the second wireless speaker 1-b receives the radio wave detection instruction from the controller 2
  • the beacon signal including the ID of the wireless speaker 1-c designated by the radio wave detection instruction, and the wireless speaker 1-d The beacon signals including the IDs are received, and the received radio wave intensity is detected (S23). Then, the reception radio wave information including the reception radio wave intensity of each beacon signal of the wireless speakers 1-c and 1-d is transmitted to the controller 2 (S24).
  • the controller 2 When the controller 2 receives the received radio wave information from the first wireless speaker 1-a and the second wireless speaker 1-b, the received radio wave included in the received radio wave information received from the first wireless speaker 1-a.
  • Strength (received radio wave intensity Wac, Wad of beacons signals of wireless speakers 1-c, 1-d detected by first wireless speaker 1-a) and received radio wave information received from second wireless speaker 1-b
  • Received radio wave strength (received radio wave strengths Wbc and Wbd of the beacons signals of the wireless speakers 1-c and 1-d detected by the second wireless speaker 1-b) and detected by the own controller 2
  • the installation states of all the grouped wireless speakers 1-a to 1-d are specified (S25).
  • 6 (A) and 6 (B) are diagrams for explaining a method for specifying the position of the grouped wireless speakers 1 other than the first and second wireless speakers.
  • the controller 2 uses the reference strength S used when determining the reference coordinate system as the received radio wave strength of the beacon signal of the wireless speaker 1-c detected by the controller 2.
  • S / Wc is the distance between the controller 2 and the wireless speaker 1-c.
  • focusing on the own controller 2 is calculated
  • the reference intensity S is divided by the received radio wave intensity Wac of the beacon signal of the wireless speaker 1-c detected by the first wireless speaker 1-a, and the result S / Wac is obtained as the first wireless speaker 1-a. And the distance between the wireless speaker 1-c.
  • a circle Rac having a radius S / Wac is obtained centering on the first wireless speaker 1-a. Further, the reference intensity S is divided by the received radio wave intensity Wbc of the beacon signal of the wireless speaker 1-c detected by the second wireless speaker 1-b, and the result S / Wbc is obtained as the second wireless speaker 1-b. And the distance between the wireless speaker 1-c. Then, a circle Rbc having a radius S / Wbc with the second wireless speaker 1-b as the center is obtained. The intersections of the circle Rc, the circle Rac, and the circle Rbc obtained as described above are obtained, and this intersection is set as the position on the reference coordinate system of the wireless speaker 1-c.
  • the controller 2 divides the reference strength S by the received radio wave strength Wd of the beacon signal of the wireless speaker 1-d detected by the controller 2, and the result is S / Wd. Is the distance between the controller 2 and the wireless speaker 1-d. Then, a circle Rd having a radius S / Wd with the self controller 2 as the center is obtained. Further, the reference intensity S is divided by the received radio wave intensity Wad of the beacon signal of the wireless speaker 1-d detected by the first wireless speaker 1-a, and the result S / Wad is obtained as the first wireless speaker 1-a. And the distance between the wireless speaker 1-d. Then, a circle Rad having a radius S / Wad is obtained around the first wireless speaker 1-a.
  • the reference intensity S is divided by the received radio wave intensity Wbd of the beacon signal of the wireless speaker 1-d detected by the second wireless speaker 1-b, and the result S / Wbd is obtained as the second wireless speaker 1-b. And the distance between the wireless speaker 1-d. Then, a circle Rbd having a radius S / Wbd with the second wireless speaker 1-b as the center is obtained. The intersections of the circle Rd, the circle Rad, and the circle Rbd obtained as described above are obtained, and this intersection is set as the position on the reference coordinate system of the wireless speaker 1-d.
  • the controller 2 displays the installation state (positions on the reference coordinate system) of the controller 2 and the grouped wireless speakers 1-a to 1-d on the display screen 200.
  • the designation 201 of the front direction P of the user (controller 2) is received from the user carrying the own controller 2.
  • the front direction P received from the user is reflected in the installation state of the grouped wireless speakers 1-a to 1-d (S27).
  • it is specified whether each of the grouped wireless speakers 1-a to 1-d is installed in the front, rear, left, or right of the user (controller 2).
  • FIG. 7 the controller 2 displays the installation state (positions on the reference coordinate system) of the controller 2 and the grouped wireless speakers 1-a to 1-d on the display screen 200.
  • the wireless speaker 1-a is installed on the rear right side of the user
  • the wireless speaker 1-b is installed on the rear left side of the user
  • the wireless speaker 1-c is installed on the front right side of the user
  • the speaker 1-d is installed on the front left side of the user.
  • the controller 2 performs grouping based on the number of grouped wireless speakers 1-a to 1-d and the installation state of the wireless speakers 1-a to 1-d reflecting the front direction P of the user.
  • the audio signal output mode of the converted wireless speakers 1-a to 1-d is determined (S28). For example, in the example shown in FIG. 7, the 4-channel mode is selected, the rear right (RR) channel is assigned to the wireless speaker 1-a, the rear left (RL) channel is assigned to the wireless speaker 1-b, and the wireless speaker 1-b is assigned.
  • the front right side (FR) is assigned to 1-c, and the front left side (FL) is assigned to the wireless speaker 1-d.
  • the controller 2 transmits an audio signal output mode and an output mode setting instruction including the assigned channel to each of the grouped wireless speakers 1-a to 1-d (S29).
  • each of the grouped wireless speakers 1-a to 1-d sets the audio signal output mode and its assigned channel according to the output mode setting instruction received from the controller 2 (S30a to S30d). .
  • FIG. 8 is a schematic functional configuration diagram of the wireless speaker 1.
  • the functional configuration of the wireless speaker 1 shown in this figure is, for example, in a computer including a CPU, a memory, an auxiliary storage device such as a flash memory, a wireless communication device such as Bluetooth (registered trademark), and a speaker. This is realized by the CPU loading a predetermined program from the auxiliary storage device onto the memory and executing it.
  • the wireless speaker 1 includes a speaker unit 10, a controller interface unit 11, a beacon signal transmission / reception unit 12, a received radio wave intensity detection unit 13, a test signal reproduction unit 14, a music data reproduction unit 15, An output characteristic adjustment unit 16 and a main control unit 17 are provided.
  • the controller interface unit 11 is an interface for communicating with the controller 2 wirelessly such as Bluetooth (registered trademark).
  • the beacon signal transmission / reception unit 12 periodically transmits a beacon signal including an ID assigned to its own wireless speaker 1 such as a RSSI (Received Signal Strength Indicator). Moreover, according to the instruction
  • RSSI Received Signal Strength Indicator
  • the received radio wave intensity detecting unit 13 detects the received radio wave intensity of the beacon signal received by the beacon signal transmitting / receiving unit 12.
  • the test signal reproduction unit 14 reproduces a test signal which is a predetermined audio signal at the output time notified from the main control unit 17 in accordance with an instruction from the main control unit 17, and outputs the output level notified from the main control unit 17. Is output from the speaker unit 10.
  • the music data reproduction unit 15 receives music data including the ID of the wireless speaker 1 as a destination from the controller 2 via the controller interface unit 11. Then, according to the audio signal output mode set by the main controller 17 and the channel assigned to the wireless speaker 1, the audio signal of the music data is reproduced.
  • the output characteristic adjusting unit 16 outputs the audio signal reproduced by the music data reproducing unit 15 from the speaker unit 10 in accordance with the output characteristic set by the main control unit 17. Specifically, the output timing of the audio signal from the speaker unit 10 is adjusted by buffering the audio signal by the output timing (output adjustment time) set by the main control unit 17. Further, the output level of the audio signal from the speaker unit 10 is adjusted to the output level set by the main control unit 17.
  • the main control unit 17 comprehensively controls each unit 10 to 16 of the wireless speaker 1. Further, the main control unit 17 causes the test signal reproduction unit 14 to reproduce the test signal or causes the beacon signal transmission / reception unit 12 to receive the beacon signal according to the instruction received from the controller 2 via the controller interface unit 11. Further, the audio signal output mode and the assigned channel are set in the music data reproducing unit 15, and the output characteristics (output timing, output level) are set in the output characteristic adjusting unit 16.
  • FIG. 9 is a flowchart for explaining the operation of the wireless speaker 1.
  • the beacon signal transmission / reception unit 12 wirelessly transmits a beacon signal including the ID of its own wireless speaker 1 when the regularly arrived beacon signal transmission timing arrives (YES in S200) (S201).
  • the main control unit 17 When the main control unit 17 receives a test instruction from the controller 2 via the controller interface unit 11 (YES in S202), the main control unit 17 notifies the test signal reproduction unit 14 of the output time and output level specified by the test instruction. In response to this, the test signal reproducing unit 14 reproduces the test signal at the designated output time, and outputs the reproduced test signal from the speaker unit 10 at the designated output level (S203).
  • the output characteristic adjustment unit 16 determines the output timing and output level specified by the output adjustment instruction. (S205).
  • the main control unit 17 when receiving a radio wave detection instruction from the controller 2 via the controller interface unit 11 (YES in S206), the main control unit 17 notifies the beacon signal transmitting / receiving unit 12 of the ID specified by the radio wave detection instruction. In response to this, the beacon signal transmitting / receiving unit 12 receives a beacon signal including this ID (S207). Then, the received radio wave intensity detector 13 detects the received radio wave intensity of the beacon signal received by the beacon signal transmitter / receiver 12, and notifies the main controller 17 of the detected received radio wave intensity (S208). In response to this, the main control unit 17 generates received radio wave information including the received radio wave intensity notified from the received radio wave intensity detecting unit 13 and the ID notified to the beacon signal transmitting / receiving unit 12. The received radio wave information is transmitted to the controller 2 via the controller interface unit 11 (S209).
  • the main control unit 17 When the main control unit 17 receives the output mode setting instruction from the controller 2 via the controller interface unit 11 (YES in S210), the main control unit 17 sets the audio signal output mode and the assigned channel specified by the output mode setting instruction to the music.
  • the data reproduction unit 15 is set (S211).
  • the music data playback unit 15 When the music data playback unit 15 receives a playback instruction including the ID of its own wireless speaker 1 from the controller 2 via the controller interface unit 11 (YES in S212), the music data playback unit 15 performs this playback according to the set audio signal output mode and the assigned channel. The music signal audio signal included in the instruction is reproduced (S213). Then, the output characteristic adjustment unit 16 buffers the audio signal reproduced by the music data reproduction unit 15 for the set output timing (output adjustment time) and then from the speaker unit 10 at the set output level. Output (S214).
  • FIG. 10 is a schematic functional configuration diagram of the controller 2.
  • the functional configuration of the controller 2 shown in this figure includes, for example, a CPU, a memory, an auxiliary storage device such as a flash memory, an input / output device such as a touch panel, a display, and a pointing device, and wireless communication such as Bluetooth (registered trademark).
  • a portable computer such as a smart phone or a tablet PC provided with a device and a microphone, this is realized by the CPU loading a predetermined program from the auxiliary storage device to the memory and executing it.
  • the controller 2 includes a microphone unit 20, a graphical user interface unit 21, a wireless speaker interface unit 22, a beacon signal receiving unit 23, a measurement unit 24, a test instruction unit 25, and an output adjustment instruction unit. 26, an output mode setting instruction unit 27, a radio wave detection instruction unit 28, a received radio wave intensity detection unit 29, a music data storage unit 30, a reproduction instruction unit 31, and a main control unit 32.
  • the graphical user interface unit 21 is an interface for displaying information and receiving various operations from the user.
  • the wireless speaker interface unit 22 is an interface for communicating with the wireless speaker 1 by radio such as Bluetooth (registered trademark).
  • the beacon signal receiving unit 23 receives a beacon signal such as RSSI periodically transmitted from the wireless speaker 1 by radio.
  • the measurement unit 24 measures the signal characteristics of the test signal output from the wireless speaker 1 and input to the microphone unit 20, and includes a delay time measurement unit 240 and an input / output ratio measurement unit 241.
  • the delay time measurement unit 240 is a delay time (input time-output time) that is a difference between the input time of the test signal input to the microphone unit 20 and the output time from the wireless speaker 1 notified from the main control unit 32. Measure.
  • the input / output ratio measurement unit 241 is an input / output ratio (input) that is a ratio between the output level of the test signal from the wireless speaker 1 notified from the main control unit 32 and the input level of the test signal input to the microphone unit 20. Level / output level).
  • the test instruction unit 25 transmits a test instruction with designation of output time and output level to the wireless speaker 1 via the wireless speaker interface unit 22.
  • the output adjustment instruction unit 26 transmits an output adjustment instruction with designation of output timing and output level to the wireless speaker 1 via the wireless speaker interface unit 22.
  • the output mode setting instruction section 27 transmits an output mode setting instruction with the audio signal output mode and the designation of the assigned channel to the wireless speaker 1 via the wireless speaker interface section 22.
  • the radio wave detection instructing unit 28 transmits to the wireless speaker 1 via the wireless speaker interface unit 22 a radio wave detection instruction with the designation of the ID of the wireless speaker 1 that is the transmission source of the beacon signal to be received. Then, the reception radio wave information including the reception radio wave intensity of the beacon signal and the ID of the wireless speaker 1 that is the transmission source of the beacon signal is received from the wireless speaker 1 that is the transmission destination of the radio wave detection instruction.
  • the received radio wave intensity detecting unit 29 detects the received radio wave intensity of the beacon signal received by the beacon signal receiving unit 23, and controls the received radio wave intensity detected together with the ID of the wireless speaker 1 added to the beacon signal. Notify unit 32.
  • the music data storage unit 30 stores music data.
  • the reproduction instruction unit 31 transmits a reproduction instruction including the music data received from the main control unit 32 and the ID of the wireless speaker 1 from the wireless speaker interface unit 22.
  • the main control unit 32 comprehensively controls each unit 20 to 31 of the controller 2.
  • the main control unit 32 includes a control target determination unit 320, a determination unit 321, an installation state determination unit 322, and an output mode determination unit 323.
  • the control target determination unit 320 is connected to the wireless phone 1 in the room where the user carrying the controller 2 is present. It is determined whether or not the speaker 1 is installed. And the wireless speaker 1 judged that the user who carries the controller 2 is installed in the room in the room is grouped as a control object.
  • the determination unit 321 determines audio signal output characteristics of the wireless speakers 1 grouped by the control target determination unit 320 based on the measurement result of the measurement unit 24, and includes an output timing determination unit 324 and an output level determination. Part 325.
  • the output timing determination unit 324 Based on the delay time of the test signal measured by the measurement unit 24 for the wireless speakers 1 grouped by the control target determination unit 320, the output timing determination unit 324, for example, the audio signal output from these wireless speakers 1 , The output timing (output adjustment time) of each of these wireless speakers 1 is determined so as to reach the controller 2 at the same timing.
  • the output level determination unit 325 Based on the input / output ratio of the test signals measured by the measurement unit 24 for the wireless speakers 1 grouped by the control target determination unit 320, the output level determination unit 325, for example, the audio output from these wireless speakers 1 The output level of each of these wireless speakers 1 is determined so that the signal reaches the controller 2 at the same volume level.
  • the installation state determination unit 322 determines the installation state of the wireless speakers 1 grouped by the control target determination unit 320, and includes a reference coordinate determination unit 326 and a position specification unit 327.
  • the reference coordinate determination unit 326 includes the received radio wave intensity of the beacon signal detected by the received radio wave intensity detection unit 29 for the first and second wireless speakers 1 selected from the grouped wireless speakers 1, and the first The relative positions of the controller 2 and the first and second wireless speakers 1 are specified based on the received radio wave intensity of the beacon signal of the second wireless speaker 1 in the wireless speaker 1. Then, a reference coordinate system is determined based on the specified relative position (see FIG. 5).
  • the position specifying unit 327 includes the received radio wave intensity of the beacon signal detected by the received radio wave intensity detecting unit 29 for the wireless speakers 1 other than the first and second wireless speakers 1 among the grouped wireless speakers 1, and the first And the received radio wave intensity of the beacon signal of the other wireless speaker 1 in the group in the second wireless speaker 1 and the position information in the reference coordinate system of the controller 2 and the first and second wireless speakers 1, The position information on the reference coordinate system of each wireless speaker 1 other than the first and second wireless speakers 1 is specified (see FIG. 6).
  • the output mode determination unit 323 sets the grouped wireless speakers 1 determined by the installation state determination unit 322 and the front direction of the user received from the user via the graphical user interface unit 21 (see FIG. 7). Based on this, the audio signal output mode of the grouped wireless speakers 1 and the channel assigned to each of these wireless speakers 1 are determined.
  • FIG. 11 is a flowchart for explaining the operation of the controller 2.
  • the main control unit 32 receives an environment setting instruction for the wireless speaker 1 that reproduces and outputs an audio signal of music data from the user via the graphical user interface unit 21 (YES in S220), a grouping process described later is performed.
  • the wireless speaker 1 installed in the room where the user carrying the controller 2 is present is grouped as the wireless speaker 1 that reproduces and outputs the audio signal of the same music data (S221).
  • the main control unit 32 adjusts the output characteristics (output timing, output level) of each of the grouped wireless speakers 1 by performing an output characteristic adjustment process described later (S222).
  • the main control unit 32 performs an output mode setting process to be described later, and sets an audio signal output mode for the grouped wireless speakers 1 and a channel assigned to each of these wireless speakers 1 (S223).
  • the main control unit 32 After the output characteristics of the grouped wireless speakers 1 are adjusted and the audio signal output mode and the assigned channel are set, the main control unit 32 is accompanied by designation of music data from the user via the graphical user interface unit 21.
  • a reproduction instruction is accepted (YES in S224)
  • the music data is read from the music data storage unit 30 and passed to the reproduction instruction unit 31 together with the ID of each of the grouped wireless speakers 1.
  • the reproduction instruction unit 31 transmits the reproduction instruction including the music data received from the main control unit 32 and the ID of each of the grouped wireless speakers 1 from the wireless speaker interface unit 22 (S225).
  • FIG. 12 is a flowchart for explaining the grouping process (S221) shown in FIG.
  • the control target determining unit 320 of the main control unit 32 determines the received radio wave intensity of the beacon signal received by the beacon signal receiving unit 23 from the received radio wave intensity detecting unit 29 together with the ID of the wireless speaker 1 added to the beacon signal. By acquiring, the wireless speaker 1 that can communicate with the wireless speaker 1 is recognized. Then, one unselected wireless speaker 1 is selected as a test target from the wireless speakers 1 communicable with the own wireless speaker 1 (S2210).
  • the control target determination unit 320 notifies the test instruction unit 25 of the ID of the wireless speaker 1 selected as the test target together with a predetermined output level and an output time set after a predetermined time has elapsed from the current time.
  • the microphone unit 20 is enabled.
  • the test instruction unit 25 transmits a test instruction with the designation of the ID, output time, and output level of the wireless speaker 1 notified from the control target determination unit 320 from the wireless speaker interface unit 22 (S2211). .
  • the wireless speaker 1 having the ID specified by the test instruction outputs a test signal at the output level specified by the test instruction at the output time specified by the test instruction. Then, this test signal is input to the microphone unit 20 (S2212).
  • the delay time measurement unit 240 of the measurement unit 24 has a delay time (input time ⁇ output time) that is a difference between the output time specified by the test instruction and the input time of the test signal input to the microphone unit 20. (S2213), and the input / output ratio measurement unit 241 of the measurement unit 24 inputs / outputs the ratio between the output level specified by the test instruction and the input level of the test signal input to the microphone unit 20. The ratio (input level / output level) is measured (S2214), and this is notified to the control target determination unit 320. In response to this, the control target determining unit 320 stores the delay time and the input / output ratio in association with the ID of the wireless speaker 1 specified by the test instruction.
  • control target determination unit 320 determines whether or not all wireless speakers 1 that can communicate with the own wireless speaker 1 have been selected as test targets (S2215). If there is a wireless speaker 1 not selected as a test target (NO in S2215), the process returns to S2210.
  • the control target determining unit 320 determines whether the input / output ratio received from the input / output ratio measuring unit 241 Is set as the reference ratio (S2216). Then, the control target determining unit 320 obtains a ratio (input / output ratio / reference ratio) of each input / output ratio received from the input / output ratio measuring unit 241 and the ratio is equal to or greater than a predetermined value (for example, 0.9). Wireless speakers 1 having IDs associated with input / output ratios are grouped (S2217). Thereafter, the process proceeds to the output characteristic adjustment process (S222) shown in FIG.
  • FIG. 13 is a flowchart for explaining the output characteristic adjustment processing (S222) shown in FIG.
  • the output timing determination unit 324 of the determination unit 321 of the main control unit 32 has a delay time (input) measured by the delay time measurement unit 240 of the measurement unit 24 for each of the wireless speakers 1 grouped by the control target determination unit 320.
  • the maximum delay time of (time-output time) is set as the reference time (S2220).
  • the output level determination unit 325 of the determination unit 321 has a maximum input / output of the input / output ratio (output level / input level) measured by the input / output ratio measurement unit 241 of the measurement unit 24 for each of the grouped wireless speakers 1.
  • the ratio is set to the reference ratio (S2221).
  • the determination unit 321 selects an unselected wireless speaker 1 as an adjustment target from among the grouped wireless speakers 1 (S2222).
  • the output timing determination unit 324 calculates a difference (reference time ⁇ delay time) between the reference time and the delay time measured by the delay time measurement unit 240 for the wireless speaker 1 to be adjusted, and adjusts this difference.
  • the output timing (output adjustment time) of the target wireless speaker 1 is determined (S2223).
  • the output level determination unit 325 divides the reference ratio by the input / output ratio measured by the input / output ratio measurement unit 241 for the wireless speaker 1 to be adjusted, and obtains the divided value (reference ratio / input / output ratio). A value obtained by multiplying the output level designated by the test instruction is determined as the output level of the wireless speaker 1 to be adjusted (S2224).
  • the determination unit 321 determines whether there is an unselected wireless speaker 1 as an adjustment target in the grouped wireless speakers 1 (NO in S2225). If there is an unselected wireless speaker 1 as an adjustment target in the grouped wireless speakers 1 (NO in S2225), the determination unit 321 returns to S2222. On the other hand, if all of the grouped wireless speakers 1 have been selected as adjustment targets (YES in S2225), the determination unit 321 outputs the output timing and output level of this wireless speaker 1 for each grouped wireless speaker 1. To the output adjustment instruction unit 26 together with the ID of the wireless speaker 1.
  • the output adjustment instruction unit 26 In response to this, the output adjustment instruction unit 26 generates an output adjustment instruction including the ID, output timing, and output level of the wireless speaker 1 for each grouped wireless speaker 1, from the wireless speaker interface unit 22. Transmit (S2226).
  • FIG. 14 is a flowchart for explaining the output mode setting process (S223) shown in FIG.
  • the reference coordinate determination unit 326 of the installation state determination unit 322 of the main control unit 32 receives the received radio wave of the beacon signal detected by the received radio wave intensity detection unit 29 for each of the wireless speakers 1 grouped by the control target determination unit 320. Based on the intensity, the first and second wireless speakers 1 are determined (S2230). For example, the wireless speaker 1 having the strongest received radio wave intensity is set as the first wireless speaker 1, and the wireless speaker 1 having the second highest received radio wave intensity is set as the second wireless speaker 1.
  • the reference coordinate determination unit 326 notifies the radio wave detection instruction unit 28 of the ID of the first wireless peaker 1 as the ID of the detection subject and the ID of the second wireless speaker as the ID of the detection target.
  • the radio wave detection instructing unit 28 transmits a radio wave detection instruction in which the ID of the first wireless peaker 1 is set as the ID of the detection subject and the ID of the second wireless speaker 1 is set as the detection target ID.
  • the data is transmitted from the unit 22 (S2231).
  • the radio wave detection instruction unit 28 receives the received radio wave information including the received radio wave intensity of the beacon signal of the second wireless speaker 1 detected by the first wireless speaker 1 from the first wireless speaker 1 (S2232). ).
  • the reference coordinate determining unit 326 receives the received radio wave intensity of the beacon signal of each of the first and second wireless speakers 1 detected by the received radio wave intensity detecting unit 29 and the received radio wave received from the first wireless speaker 1. Based on the received radio wave intensity (received radio wave intensity of the beacon signal of the second wireless speaker 1 detected by the first wireless peaker 1) included in the information, the reference is made according to the procedure described with reference to FIG. The coordinate system is determined, and the positions of the controller 2 and the first and second wireless speakers 1 on the reference coordinate system are specified (S2233).
  • the position specifying unit 327 of the installation state determination unit 322 selects an unselected wireless speaker 1 other than the first and second wireless speakers 1 from among the grouped wireless speakers 1 as a setting target (S2234). ).
  • the position specifying unit 327 notifies the radio wave detection instructing unit 28 of the IDs of the first and second wireless peakers as the detection main ID and the ID of the wireless speaker 1 to be set as the detection target ID.
  • the radio wave detection instructing unit 28 wirelessly issues a radio wave detection instruction in which the IDs of the first and second wireless speakers 1 are set as IDs of detection subjects and the ID of the wireless speaker 1 to be set is set as the detection target ID. It transmits from the speaker interface unit 22 (S2235).
  • the radio wave detection instruction unit 28 receives the received radio wave information including the received radio wave intensity of the beacon signal of the setting target wireless speaker 1 detected by the first wireless peaker 1 from the first wireless speaker 1, and Received radio wave information including the received radio wave intensity of the beacon signal of the setting target wireless speaker 1 detected by the second wireless speaker 1 is received from the second wireless speaker 1 (S2236).
  • the position specifying unit 327 is included in the reception radio wave intensity of the beacon signal of the setting target wireless speaker 1 detected by the reception radio wave intensity detection unit 29 and the reception radio wave information received from the first wireless speaker 1.
  • Received radio wave intensity (received radio wave intensity of the beacon signal of the setting target wireless speaker 1 detected by the first wireless peaker 1) and the received radio wave included in the received radio wave information received from the second wireless speaker 1 Based on the strength (received radio wave strength of the beacon signal of the setting target wireless speaker 1 detected by the second wireless speaker 1) and the position of the controller 2 and the first and second wireless speakers 1 on the reference coordinate system
  • the position on the reference coordinate system of the wireless speaker 1 to be set is specified according to the procedure described with reference to FIG. S2237).
  • the position specifying unit 327 is S2234.
  • all of the grouped wireless speakers 1 have been selected as setting targets except for the first and second wireless speakers (YES in S2238)
  • all the groups including the first and second wireless speakers 1 have been grouped.
  • the position of the wireless speaker 1 on the reference coordinate system is specified.
  • the installation state determination unit 322 installs the grouped wireless speakers 1 based on the position of the controller 2 on the reference coordinate system and the positions of all the grouped wireless speakers 1 on the reference coordinate system. (Relative position of each grouped wireless speaker 1 with respect to its own controller 2) is determined (S2239). Then, the determined installation state is passed to the output mode determination unit 323.
  • the output mode determination unit 323 displays the installation state of the grouped wireless speakers 1 received from the installation state determination unit 322 on the graphical user interface unit 21 (see FIG. 7), and from the user carrying the own controller 2.
  • the designation of the front direction of the user (controller 2) is accepted (S2240).
  • the output mode determination unit 323 reflects the front direction received from the user in the installation state of the grouped wireless speakers. Thereby, it is specified whether each of the grouped wireless speakers 1 is installed in the front, rear, left, or right of the user (controller 2).
  • the output mode determination unit 323 determines the audio signal output mode of the grouped wireless speakers 1 and the wireless signals based on the installation state reflecting the number of grouped wireless speakers 1 and the front direction of the user.
  • the assigned channel of each speaker 1 is determined (S2241). Then, the audio signal output mode of the grouped wireless speakers 1 and the assigned channel of each wireless speaker 1 are notified to the output mode setting instruction unit 27 together with the ID of each wireless speaker 1.
  • the output mode setting instruction unit 27 includes the audio signal output mode notified from the output mode determination unit 323, and the assigned channel associated with the ID for each of the grouped wireless speakers 1, An output mode setting instruction for each grouped wireless speaker 1 as a transmission destination is transmitted from the wireless speaker interface unit 22 (S2242). Thereafter, the process proceeds to S224 in FIG.
  • the controller 2 collects the test signal output from the wireless speaker 1 by the microphone unit 20 of the controller 2 carried by the listener, and outputs the test signal output time from the wireless speaker 1 and the microphone unit 20.
  • a process of measuring a delay time that is a difference from the input time of the test signal is performed for each of the plurality of wireless speakers 1 that output audio signals of the same music data. Based on the delay time of the audio signal of each wireless speaker 1, the output timing (output adjustment time) of each wireless speaker 1 is adjusted. Therefore, for example, each wireless speaker 1 can be adjusted to be an optimal audio signal at the listening position so that the audio signal output from each wireless speaker 1 reaches the listening position at the same timing.
  • the controller 2 collects the test signal output from the wireless speaker 1 by the microphone unit 20 of the controller 2 carried by the listener, and outputs the test signal output level from the wireless speaker 1.
  • the process of measuring the input / output ratio which is the ratio to the input level of the test signal to the microphone unit 20, is performed for each of the plurality of wireless speakers 1 that output the audio signal of the same music data.
  • the output level of each wireless speaker 1 is adjusted based on the audio signal input / output ratio of each wireless speaker 1. Therefore, for example, each wireless speaker 1 can be adjusted so that the audio signal output from each wireless speaker 1 becomes the same audio signal at the listening position so that the audio signal is at the same level at the listening position.
  • the controller 2 determines whether or not the wireless speaker 1 should be excluded from the control target based on the input / output ratio of the audio signal of each wireless speaker 1, and the wireless to be the control target.
  • the speakers 1 are grouped. Then, the audio signal output adjustment is performed on the grouped wireless speakers 1. For this reason, for example, the wireless speakers 1 installed in the same room as the listener carrying the controller 2 can be grouped and the output of only these wireless speakers 1 can be adjusted.
  • the wireless speaker 1 periodically transmits a beacon signal including the ID of the wireless speaker 1 itself. Further, according to the radio wave detection instruction received from the controller 1, a beacon signal including the ID of the wireless speaker 1 specified by the radio wave detection instruction is received, the received radio wave intensity is detected, and the detected received radio wave intensity is determined by the controller. 2 is notified.
  • the controller 2 receives the beacon signal transmitted from the wireless speaker 1 and detects the received radio wave intensity.
  • the first and second wireless speakers 1 are selected from the grouped wireless speakers 1, and a radio wave detection instruction including the ID of the second wireless speaker is transmitted to the first wireless speaker 1.
  • the received radio wave intensity of the second wireless speaker detected by the wireless speaker is acquired.
  • the received radio wave intensity of each of the first and second wireless speakers 1 detected by the controller 2 and the received radio wave intensity of the second wireless speaker 1 detected by the first wireless speaker 1, Is used to determine the reference coordinate system and specify the position of the controller 2 and the first and second wireless speakers 1 on the reference coordinate system.
  • a radio wave detection instruction including the ID of the target wireless speaker 1 is transmitted to each of the first and second wireless speakers 1, and the target wireless speakers 1 detected by the first and second wireless speakers 1, respectively. Get received radio field strength. Then, the received radio wave intensity of the target wireless speaker detected by the own controller 2 and the first and second wireless speakers 1 and the position of the own controller 2 and the first and second wireless speakers 1 on the reference coordinate system And the position of the target wireless speaker 1 on the reference coordinate system is specified.
  • the installation state of the grouped wireless speakers 1 (relative position with respect to the own controller 2). And the audio signal output mode of the grouped wireless speakers 1 is determined based on the installation state. For this reason, an appropriate audio signal output mode can be set for these wireless speakers 1 according to the installation state of the grouped wireless speakers 1.
  • the controller 2 displays the installation state of the grouped wireless speakers 1 and receives a front direction designation from a listener carrying the controller 2. Then, the audio signal output mode is determined based on the installation state of the grouped wireless speakers 1 in which the front direction of the listener is reflected. Thereby, the audio signal output mode of the grouped wireless speakers 1 can be set more appropriately.
  • the wireless audio system according to the present embodiment is the same as the wireless audio system according to the first embodiment shown in FIG. 1, except that the wireless speakers 1′-a to 1′-k instead of the wireless speakers 1-a to 1-k. (Hereinafter also simply referred to as wireless speaker 1 ′) and a controller 2 ′ is used instead of the controller 2.
  • the wireless speaker 1 ′ has a plurality of directional antennas each having a different directivity, depending on which directional antenna receives the beacon signal with the highest sensitivity in addition to the received radio wave intensity of the beacon signal. The reception direction of the beacon signal can be detected.
  • the controller 2 ′ periodically transmits a beacon signal including the ID of the controller 2 ′.
  • FIG. 15 is a flowchart for explaining the operation of the wireless audio system according to the present embodiment.
  • a case where the listener carrying the controller 2 'sets the output characteristics and output modes of the wireless speakers 1'-a to 1'-d installed in the A room is described as an example.
  • S10 to S15 (S15a to S15d) shown in FIG. 2 and FIG. 3 are performed, whereby the wireless speakers 1′-a to 1′-d installed in the same room A as the listener carrying the controller 2 ′. And the output characteristics (output timing, output level) of the grouped wireless speakers 1′-a to 1′-d are adjusted (S40).
  • the controller 2 selects one of the grouped wireless speakers 1'-a to 1'-d, and sets this wireless speaker 1' as the first wireless speaker 1 '.
  • the wireless speaker 1 ′ with the maximum received radio wave intensity of the beacon signal is selected and set as the first wireless speaker 1 ′.
  • the wireless speaker 1'-a having the maximum received radio wave intensity of the beacon signal is set as the first wireless speaker 1 '.
  • the controller 2 ' transmits a radio wave detection instruction including the designation of the ID of the controller 2' to the wireless speaker 1'-a set in the first wireless speaker 1 '(S41).
  • the first wireless speaker 1′-a When the first wireless speaker 1′-a receives the radio wave detection instruction from the controller 2 ′, the first wireless speaker 1′-a receives the beacon signal including the designation of the ID of the controller 2 ′ designated by the radio wave detection instruction, and receives the received radio wave.
  • the intensity and the receiving direction are detected (S42). Specifically, the maximum received radio wave strength of the beacon signal received by each of a plurality of directional antennas having different directivity is set as the received radio wave strength of the beacon signal, and the maximum received radio wave strength is received.
  • the directivity range (for example, left side, center, right side, etc.) of the directional antenna is set as the reception direction of the beacon signal. Then, the first wireless speaker 1'-a transmits the received radio wave information including the detected received radio wave intensity and the reception direction to the controller 2 '(S43).
  • the controller 2 ′ When receiving the received radio wave information from the first wireless speaker 1′-a, the controller 2 ′ receives the received radio wave intensity and the reception direction (detected by the first wireless speaker 1′-a) included in the received radio wave information.
  • the reference coordinate system for specifying the installation positions of the grouped wireless speakers 1′-a to 1′-d is determined using the received radio wave intensity and reception direction of the beacon signal of the controller 2 ′ (S44). ).
  • FIG. 16A is a diagram for explaining a method of determining a reference coordinate system for specifying the installation position of the wireless speaker 1 ′.
  • the controller 2 ′ detects the beacon signal of the first wireless speaker 1 ′ -a detected by the controller 2 ′ or the beacon of the controller 2 ′ detected by the first wireless speaker 1 ′ -a.
  • the received radio wave intensity Wa of the signal is set as a reference intensity S.
  • the reference intensity S is divided, and the result S / Wa is set as the distance between the controller 2 ′ and the wireless speaker 1′-a.
  • the controller 2 ′ sets its own controller 2 ′ to the origin (0, 0), and an arbitrary point on a circle having a radius S / Wa centered on the origin is defined as the first wireless speaker 1′-a.
  • a reference coordinate system (XY orthogonal) Determine the coordinate system.
  • the position of the first wireless speaker 1'-a is converted to a position (0, S / Wa) on the reference coordinate system.
  • the reception direction of the beacon signal of the own controller 2 ′ detected by the first wireless speaker 1′-a is defined as the direction ( ⁇ Y direction) from the first wireless speaker 1′-a toward the own controller 2 ′.
  • the controller 2 determines the reference coordinate system as described above, the controller 2 is different from the wireless speaker 1′-a set to the first wireless speaker other than the first wireless speaker 1′-a.
  • a radio wave detection instruction including designation of IDs of the grouped wireless speakers 1′-b to 1′-d is transmitted (S45).
  • the first wireless speaker 1′-a receives the radio wave detection instruction from the controller 2 ′, the beacon signal including the ID of the wireless speaker 1′-b specified by the radio wave detection instruction, the wireless speaker 1′-c
  • the beacon signal including the ID of the wireless beacon and the beacon signal including the ID of the wireless speaker 1′-d are respectively received, and the received radio wave intensity and the receiving direction are detected (S46).
  • the reception radio wave information including the reception radio wave intensity and reception direction of each beacon signal of the wireless speakers 1'-b to 1'-d is transmitted to the controller 2 '(S47).
  • the controller 2 ′ When receiving the received radio wave information from the first wireless speaker 1′-a, the controller 2 ′ receives the received radio wave intensity and the reception of the beacon signal included in the received radio wave information received from the first wireless speaker 1′-a.
  • Direction (reception radio wave intensity and reception direction of beacon signals of wireless speakers 1'-b to 1'-d detected by first wireless speaker 1'-a) and wireless speaker 1 detected by own controller 2 ' The received radio wave intensity of the beacon signal of “ ⁇ b to 1′-d”, the position of the controller 2 ′ and the first wireless speaker 1′-a on the reference coordinate system, and the first wireless speaker 1′-a
  • the groups of the wireless speakers 1′-b to 1′-d grouped are grouped. Identifying a position on the coordinate system. As a result, the installation states of all the grouped wireless speakers 1'-a to 1'-d are specified (S48).
  • FIGS. 16B, 17A, and 17B are diagrams for explaining a method for specifying the position of the grouped wireless speakers 1 ′ other than the first wireless speaker 1′-a. is there.
  • the controller 2 ′ uses the reference intensity S used when determining the reference coordinate system as the beacon signal of the wireless speaker 1′-b detected by the controller 2 ′. Dividing by the received radio wave intensity Wb, the result S / Wb is the distance between the controller 2 'and the wireless speaker 1'-b. Then, a circle Rb having a radius S / Wb with the self controller 2 'as the center is obtained. Further, the reference intensity S is divided by the received radio wave intensity Wab of the beacon signal of the wireless speaker 1′-b detected by the first wireless speaker 1′-a. As a result, S / Wab is obtained as the first wireless speaker 1 The distance between '-a and the wireless speaker 1'-b.
  • a circle Rab having a radius S / Wab centered on the first wireless speaker 1'-a is obtained.
  • the reception direction of the beacon signal of the wireless speaker 1′-b detected by the first wireless speaker 1′-a and the beacon signal of the controller 2 ′ detected by the first wireless speaker 1′-a is obtained.
  • the reception direction of the first wireless speaker 1′-a to determine whether the wireless speaker 1′-b is on the left or right side of the controller 2 ′.
  • the controller 2 ′ obtains an intersection on the left side of the controller 2 ′ when viewed from the first wireless speaker 1′-a among the two intersections of the circle Rb and the circle Rab, and determines the intersection as the wireless speaker 1′ ⁇ .
  • the controller 2 ′ uses the reference intensity S used when determining the reference coordinate system as the beacon signal of the wireless speaker 1′-c detected by the controller 2 ′. Is divided by the received radio wave intensity Wc, and the result S / Wc is taken as the distance between the controller 2 'and the wireless speaker 1'-c. Then, a circle Rc having a radius S / Wc with the self controller 2 'as the center is obtained.
  • the reference intensity S is divided by the received radio wave intensity Wac of the beacon signal of the wireless speaker 1′-c detected by the first wireless speaker 1′-a, and as a result, S / Wac is obtained as the first wireless speaker 1 The distance between '-a and the wireless speaker 1'-c. Then, a circle Rac having a radius S / Wac is obtained around the first wireless speaker 1'-a. Next, the reception direction of the beacon signal of the wireless speaker 1'-c detected by the first wireless speaker 1'-a and the beacon signal of the controller 2 'detected by the first wireless speaker 1'-a.
  • the controller 2 ′ obtains an intersection on the right side of the controller 2 ′ when viewed from the first wireless speaker 1′-a among the two intersections of the circle Rc and the circle Rac, and determines this intersection as the wireless speaker 1′ ⁇ .
  • Let c be the position on the reference coordinate system.
  • the controller 2 ′ uses the reference intensity S used when determining the reference coordinate system as the beacon signal of the wireless speaker 1′-d detected by the controller 2 ′. Is divided by the received radio wave intensity Wd, and the result S / Wd is taken as the distance between the controller 2 'and the wireless speaker 1'-d. Then, a circle Rd having a radius S / Wd with the self controller 2 'as the center is obtained.
  • the reference intensity S is divided by the received radio wave intensity Wad of the beacon signal of the wireless speaker 1′-d detected by the first wireless speaker 1′-a, and as a result, S / Wad is obtained as the first wireless speaker 1 The distance between '-a and the wireless speaker 1'-d. Then, a circle Rad having a radius S / Wad is obtained around the first wireless speaker 1'-a. Next, the reception direction of the beacon signal of the wireless speaker 1'-d detected by the first wireless speaker 1'-a and the beacon signal of the controller 2 'detected by the first wireless speaker 1'-a. And the reception direction of the first wireless speaker 1′-a to determine whether the wireless speaker 1′-d is on the left or right side with respect to the own controller 2 ′.
  • the controller 2 ′ obtains an intersection on the right side of the controller 2 ′ when viewed from the first wireless speaker 1′-a among the two intersections of the circle Rd and the circle Rad, and determines this intersection as the wireless speaker 1′ ⁇ .
  • Let d be the position on the reference coordinate system.
  • S26 to S30 (S30a to S30d) shown in FIG. 4 are performed, whereby the audio signals of the wireless speakers 1′-a to 1′-d installed in the same room A as the listener carrying the controller 2 ′ are implemented.
  • the output mode and the assigned channel for each of these wireless speakers 1′-a to 1′-d are set (S49).
  • FIG. 18 is a schematic functional configuration diagram of the wireless speaker 1 ′.
  • the functional configuration of the wireless speaker 1 ′ shown in this figure is, for example, in a computer including a CPU, a memory, an auxiliary storage device such as a flash memory, a wireless communication device such as Bluetooth (registered trademark), and a speaker. This is realized by the CPU loading a predetermined program from the auxiliary storage device onto the memory and executing it.
  • the wireless speaker 1 ′ according to the present embodiment is different from the wireless speaker 1 according to the first embodiment shown in FIG. 8 in that a beacon signal transmitting / receiving unit 12 ′ is used instead of the beacon signal transmitting / receiving unit 12, and The received radio wave intensity / direction detecting unit 13 ′ is used in place of the received radio wave intensity detecting unit 13.
  • Other configurations are the same as those of the wireless speaker 1 according to the first embodiment shown in FIG.
  • the beacon signal transmitting / receiving unit 12 ′ has a plurality of directional antennas each having a different directivity, and transmits a beacon signal including an ID assigned to the own wireless speaker 1 ′ such as RSSI using these directional antennas. To do. Moreover, according to the instruction
  • the received radio wave intensity / direction detecting unit 13 ' specifies the directional antenna that has received the beacon signal with the highest sensitivity among the plurality of directional antennas included in the beacon signal transmitting / receiving unit 12'. Then, the reception radio wave intensity of the beacon signal received by the specified directional antenna is detected, and the directivity range (for example, left side, center, right side, etc.) of the directional antenna is detected as the reception direction of the beacon signal.
  • the operation of the wireless speaker 1 'according to the present embodiment is basically the same as the operation of the wireless speaker 1 according to the first embodiment shown in FIG. However, the processes in S207 to S209 are different. That is, in S207, the beacon signal transmission / reception unit 12 ′ receives a beacon signal including an ID notified from the main control unit 17 using a plurality of directional antennas having different directivities, and in S208, the received radio wave intensity.
  • the direction detection unit 13 ′ identifies the directional antenna that has received the beacon signal with the highest sensitivity among the plurality of directional antennas included in the beacon signal transmission / reception unit 12 ′, and the beacon signal received by the directional antenna While detecting the received radio wave intensity, the directivity range of the directional antenna is detected as the reception direction of the beacon signal.
  • the main control unit 17 receives received radio wave information including the received radio wave intensity / reception direction detected by the received radio wave intensity / direction detecting unit 13 ′ and the ID notified to the beacon signal transmitting / receiving unit 12 ′.
  • the received radio wave information is generated and transmitted to the controller 2 ′ via the controller interface unit 11.
  • FIG. 19 is a schematic functional configuration diagram of the controller 2 ′.
  • the functional configuration of the controller 2 'shown in this figure includes, for example, a CPU, a memory, an auxiliary storage device such as a flash memory, an input / output device such as a touch panel, a display and a pointing device, and a wireless device such as Bluetooth (registered trademark).
  • a portable computer such as a smart phone or a tablet PC provided with a communication device and a microphone
  • the CPU is realized by loading a predetermined program from the auxiliary storage device onto the memory and executing it.
  • the controller 2 ′ according to the present embodiment is different from the controller 2 according to the first embodiment shown in FIG. 10 in that a beacon signal transmitting / receiving unit 23 ′ is used instead of the beacon signal receiving unit 23, and the installation state It is the point that it replaced with the determination part 322 and used installation state determination part 322 '.
  • Other configurations are the same as those of the controller 2 according to the first embodiment shown in FIG.
  • the beacon signal transmitting / receiving unit 23 ' periodically transmits a beacon signal including an ID assigned to the controller 2' such as RSSI by radio. Further, a beacon signal periodically transmitted from the wireless speaker 1 is received by radio.
  • the installation state determination unit 322 ' determines the installation state of the wireless speakers 1' grouped by the control target determination unit 320, and includes a reference coordinate determination unit 326 'and a position specification unit 327'.
  • the reference coordinate determining unit 326 ′ receives the received radio wave intensity of the beacon signal detected by the received radio wave intensity detecting unit 29 for the first wireless speaker 1 ′ selected from the grouped wireless speakers 1 ′ or the first wireless speaker 1 ′. Based on the received radio wave intensity of the beacon signal of its own controller 2 'in the wireless speaker 1' and the receiving direction of the beacon signal of its own controller 2 'in the first wireless speaker 1', the controller 2 and the first wireless speaker Specify the relative position of 1 '. Then, a reference coordinate system is determined based on the specified relative position (see FIG. 16A).
  • the position specifying unit 327 ′ includes the received radio wave intensity of the beacon signal detected by the received radio wave intensity detecting unit 29 for the wireless speakers 1 ′ other than the first wireless speaker 1 ′ among the grouped wireless speakers 1 ′, The reception radio wave intensity and reception direction of the beacon signal of each of the other wireless speakers 1 ′ in the group of the one wireless speaker 1 ′, position information in the reference coordinate system of the controller 2 ′ and the first wireless speaker 1 ′, Based on the reception direction of the beacon signal of the controller 2 ′ in one wireless speaker 1 ′, the position information on the reference coordinate system of each of the wireless speakers 1 ′ other than the first wireless speaker 1 ′ is specified (FIG. 16). (B), FIG. 17 (A) and FIG. 17 (B)).
  • the operation of the controller 2 ′ according to the present embodiment is different from the operation of the controller 2 according to the first embodiment shown in FIG. 11 in that an output mode setting process (223 ′) is substituted for the output mode setting process (S223). ).
  • Other processing is the same as the operation of the controller 2 according to the first embodiment shown in FIG.
  • FIG. 20 is a flowchart for explaining the output mode setting process (S223 ') of the controller 2'.
  • the reference coordinate determination unit 326 ′ of the installation state determination unit 322 ′ of the main control unit 32 detects the beacon signal detected by the received radio wave intensity detection unit 29 for each of the wireless speakers 1 ′ grouped by the control target determination unit 320.
  • the first wireless speaker 1 ′ is determined based on the received radio field intensity (S2260). For example, the wireless speaker 1 'having the strongest received radio wave intensity is set as the first wireless speaker 1'.
  • the reference coordinate determination unit 326 ′ notifies the radio wave detection instruction unit 28 of the ID of the first wireless peaker 1 ′ as the ID of the detection subject and the ID of the own controller 2 ′ as the ID of the detection target.
  • the radio wave detection instructing unit 28 uses the wireless speaker interface unit 22 to perform a radio wave detection instruction in which the ID of the first wireless peaker 1 'is the ID of the detection subject and the ID of the controller 2' is the ID of the detection target. (S2261).
  • the radio wave detection instructing unit 28 receives the received radio wave information including the received radio wave intensity and the receiving direction of the controller 2 ′ detected by the first wireless speaker 1 ′ from the first wireless speaker 1 ′ (S2262). .
  • the reference coordinate determination unit 326 ′ is included in the reception radio wave intensity of the beacon signal of the first wireless speaker detected by the reception radio wave intensity detection unit 29 or the reception radio wave information received from the first wireless speaker.
  • the own controller 2 detected by the first wireless peaker included in the received radio wave intensity of the beacon signal of the own controller 2 ′ detected by the first wireless speaker and the received radio wave information received from the first wireless speaker.
  • the reference coordinate system is determined according to the procedure described with reference to FIG. 16A on the basis of the beacon signal reception direction of “', and the positions of the own controller 2 ′ and the first wireless speaker on the reference coordinate system are determined. Is specified (S2263).
  • the position specifying unit 327 ′ of the installation state determination unit 322 ′ selects an unselected wireless speaker 1 ′ other than the first wireless speaker 1 ′ as a setting target from among the grouped wireless speakers 1 ′. (S2264).
  • the position specifying unit 327 ′ notifies the radio wave detection instructing unit 28 of the ID of the first wireless peaker 1 ′ as the ID of the detection subject and the ID of the wireless speaker 1 ′ to be set as the ID of the detection target.
  • the radio wave detection instructing unit 28 uses the wireless speaker to issue a radio wave detection instruction in which the ID of the first wireless peaker 1 ′ is set as the ID of the detection subject and the ID of the setting target wireless speaker 1 ′ is set as the detection target ID. Transmission is performed from the interface unit 22 (S2265). Then, the radio wave detection instructing unit 28 receives the received radio wave information including the received radio wave intensity and the reception direction of the beacon signal of the setting target wireless speaker 1 ′ detected by the first wireless speaker 1 ′. (S2266).
  • the position specifying unit 327 ′ uses the received radio wave intensity of the beacon signal of the setting target wireless speaker 1 ′ detected by the received radio wave intensity detector 29 and the received radio wave information received from the first wireless speaker 1 ′.
  • the received radio wave intensity and reception direction (the reception radio wave intensity and reception direction of the beacon signal of the setting target wireless speaker 1 ′ detected by the first wireless speaker 1 ′), the own controller 2 ′, and the first Based on the position of the wireless speaker 1 ′ on the reference coordinate system and the reception direction of the beacon signal of the controller 2 ′ of the first wireless speaker 1 ′, FIG. 16B, FIG. 17A and FIG.
  • the position on the reference coordinate system of the wireless speaker 1 ′ to be set is specified according to the procedure described using 17 (B) (S2267). .
  • the position specifying unit 327 ′ includes a wireless speaker 1 ′ that is not selected as a setting target other than the first wireless speaker 1 ′ among the grouped wireless speakers 1 ′ (NO in S2268).
  • the process returns to S2264.
  • all the grouped wireless speakers 1 ′ have been selected as the setting targets (YES in S2268)
  • all the grouped wireless speakers including the first wireless speaker 1 ′ have been selected.
  • the position on the reference coordinate system of 1 ′ is specified.
  • the installation state determination unit 322 ′ uses the grouped wireless speakers 1 based on the position of the controller 2 ′ on the reference coordinate system and the positions of all the grouped wireless speakers 1 ′ on the reference coordinate system. Is determined (the relative position of each of the grouped wireless speakers 1 ′ with respect to its own controller 2 ′) (S 2269). Then, the determined installation state is passed to the output mode determination unit 323.
  • the output mode determination unit 323 displays the installation state of the grouped wireless speakers 1 ′ received from the installation state determination unit 322 ′ on the graphical user interface unit 21 (see FIG. 7), and carries the own controller 2 ′.
  • the designation of the front direction of the user (controller 2 ′) is received from the user who performs (S2270).
  • the output mode determination unit 323 reflects the front direction received from the user in the installation state of the grouped wireless speakers 1 ′. Thereby, it is specified whether each of the grouped wireless speakers 1 ′ is installed on the front, rear, left, or right of the user (controller 2 ′).
  • the output mode determination unit 323 determines the audio signal output modes of the grouped wireless speakers 1 ′ and these based on the installation state reflecting the number of grouped wireless speakers 1 ′ and the front direction of the user.
  • the assigned channel of each wireless speaker 1 ′ is determined (S2271). Then, the audio signal output mode of the grouped wireless speakers 1 ′ and the assigned channel of each of these wireless speakers 1 ′ are notified to the output mode setting instruction unit 27 together with the ID of each of these wireless speakers 1 ′.
  • the output mode setting instruction unit 27 includes the audio signal output mode notified from the output mode determination unit 323 and the assigned channel associated with the ID for each grouped wireless speaker 1 ′. Then, an output mode setting instruction for each grouped wireless speaker 1 'as a transmission destination is transmitted from the wireless speaker interface unit 22 (S2272). Thereafter, the process proceeds to S224 in FIG.
  • This embodiment has the following effects in addition to the effects of the first embodiment described above. That is, since the controller 2 ′ transmits the radio wave detection instruction and receives the received radio wave information only to the first wireless speaker 1 ′, the controller 2 Compared to the first embodiment in which the radio wave detection instruction is transmitted and the received radio wave information is received, the communication traffic can be reduced, and thereby the installation state of the grouped wireless speakers 1 ′ can be determined more quickly.
  • the controller 2, 2 ′ transmits a test instruction with designation of the output time and output level to the wireless speaker 1, 1 ′.
  • the test signal is reproduced at the output time specified by the test instruction and output at the output level specified by the test instruction.
  • the present invention is not limited to this. It is not necessary to include the designation of the output time and the output level in the test instruction transmitted by the controllers 2 and 2 '.
  • the wireless speaker 1, 1 ' notifies the controller 2, 2' of the output time and output level of the test signal. Further, by setting the output level to a predetermined level between the controllers 2 and 2 ′ and the wireless speakers 1 and 1 ′, exchange between the two may be omitted.
  • the various instructions transmitted from the controllers 2 and 2 ′ to the wireless speakers 1 and 1 ′ may be multicast transmission.
  • the controllers 2 and 2 ′ may transmit the wireless speakers 1 and 1 ′.
  • Unicast transmission may be used when '' is recognized.
  • the controllers 2 and 2 ′ and the wireless speakers 1 and 1 ′ are directly connected via a wireless network by short-range wireless communication such as wireless LAN ad hoc mode or Bluetooth (registered trademark). However, it may be connected via an access point.
  • short-range wireless communication such as wireless LAN ad hoc mode or Bluetooth (registered trademark).
  • Bluetooth registered trademark
  • each of these wireless speakers 1 is based on the input / output ratio of the test signal received from each grouped wireless speaker 1.
  • the present invention is not limited to this.
  • the wireless speaker 1 installed in front of the user is specified by the designation 201 of the front direction P from the user, and is installed in front of this user.
  • the input / output ratio of the audio signal received from the wireless speaker 1 is set as a reference ratio.
  • the grouped wireless speakers 1 are arranged such that the audio signal output from the wireless speaker 1 has the same level as the audio signal output from the wireless speaker 1 installed in front of the user at the listening position. The output level may be adjusted.
  • the user installs the most main wireless speaker 1 in front of the plurality of wireless speakers 1 installed in the same room. For this reason, a user who wants to adjust the volume level of each of the other wireless speakers on the basis of the volume level of the main wireless speaker 1 is improved and useful.
  • the music data is stored in the music data storage unit 30 of the controller 2, but the present invention is not limited to this.
  • music data is stored in a media server connected via the Internet, and each wireless speaker 1 is communicated by wireless communication such as Bluetooth (registered trademark) or Wi-Fi (registered trademark) in accordance with an instruction from the controller 2. It is good also as a structure which acquires the music data stored in and reproduces

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PCT/JP2016/076893 2016-02-08 2016-09-13 ワイヤレスオーディオシステム、コントローラ、ワイヤレススピーカ、およびコンピュータで読み取り可能なプログラム Ceased WO2017138182A1 (ja)

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JP6604865B2 (ja) 2019-11-13
EP3416411A1 (en) 2018-12-19

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