WO2017064964A1 - ワイヤレススピーカ、コントローラ、ワイヤレスオーディオシステム、およびコンピュータで読み取り可能なプログラム - Google Patents

ワイヤレススピーカ、コントローラ、ワイヤレスオーディオシステム、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
WO2017064964A1
WO2017064964A1 PCT/JP2016/076849 JP2016076849W WO2017064964A1 WO 2017064964 A1 WO2017064964 A1 WO 2017064964A1 JP 2016076849 W JP2016076849 W JP 2016076849W WO 2017064964 A1 WO2017064964 A1 WO 2017064964A1
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WO
WIPO (PCT)
Prior art keywords
output
wireless speaker
input
audio signal
controller
Prior art date
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Ceased
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PCT/JP2016/076849
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English (en)
French (fr)
Japanese (ja)
Inventor
康雄 高須
加藤　剛
雅人 藤井
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D&M Holdings Inc
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D&M Holdings Inc
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Publication date
Application filed by D&M Holdings Inc filed Critical D&M Holdings Inc
Priority to US15/767,744 priority Critical patent/US20180302716A1/en
Priority to EP16855218.0A priority patent/EP3364665B1/en
Publication of WO2017064964A1 publication Critical patent/WO2017064964A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H04S7/303—Tracking of listener position or orientation
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/165—Management of the audio stream, e.g. setting of volume, audio stream path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems

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 technique for reducing standby power of a wireless speaker.
  • the wireless speaker includes a receiving circuit for wirelessly receiving command data from the audio player.
  • the wireless speaker turns off the main power and
  • the receiving circuit is intermittently operated by a power source.
  • the listener in the room where the wireless speaker outputting the music data is installed without stopping the output of the music data, and does not return to the room as it is. In this case, the output of the audio signal is continued even though no one is listening, and there is a problem that power is wasted.
  • the technique described in Patent Document 2 is a technique for reducing standby power of a wireless speaker, and does not consider any reduction in power consumption due to useless output of audio signals.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique capable of reducing power consumption by suppressing output of useless audio signals.
  • an audio signal output from a wireless speaker is compared with an audio signal input to a microphone of a controller carried by a user. It is judged whether or not it is away from. Then, when it is determined that the listener is away from the vicinity of the wireless speaker, the output of the audio signal from the wireless speaker is stopped.
  • one aspect of the present invention is a wireless speaker that reproduces and outputs an audio signal according to a remote operation of a controller, Output characteristic measuring means for sequentially measuring the output characteristics of the audio signal output within a predetermined time; From the controller, input characteristics receiving means for sequentially receiving the input characteristics of the audio signal input to the microphone included in the controller within the predetermined time; The latest output characteristic measured by the output characteristic measuring unit and the latest input characteristic received by the input characteristic receiving unit are compared, and based on the comparison result, the listener who owns the controller moves away from the periphery of the wireless speaker.
  • a determination means for determining whether or not Control means for stopping the output of an audio signal when the judgment means judges that the listener has moved away from the periphery of the wireless speaker.
  • the output characteristic measuring means sequentially measures the output volume level of the audio signal output from the wireless speaker within the predetermined time as the output characteristic, and the input characteristic receiving means is within the predetermined time.
  • An input volume level of an audio signal input to a microphone included in the controller may be sequentially received as the input characteristic.
  • the determination unit is configured to detect the listener when the ratio of the latest input volume level received by the input characteristic reception unit with respect to the latest output volume level measured by the output characteristic measurement unit decreases by a predetermined value or more. May be determined to be away from the periphery of the wireless speaker.
  • the output characteristic measuring unit sequentially measures the output waveform of the audio signal output from the wireless speaker within the predetermined time as the output characteristic
  • the input characteristic receiving unit is configured so that the controller receives the output characteristic within the predetermined time.
  • An input waveform of an audio signal input to a provided microphone may be sequentially received as the input characteristic.
  • the determination unit determines whether the listener has the delay time of the latest input waveform received by the input characteristic reception unit with respect to the latest output waveform measured by the output characteristic measurement unit exceeds a predetermined value. It may be determined that the wireless speaker is away from the periphery.
  • Another aspect of the present invention is a controller for remotely operating a wireless speaker that reproduces and outputs an audio signal, With a microphone, Input characteristic measuring means for sequentially measuring the input characteristics of the audio signal input to the microphone within a predetermined time; and Output characteristic receiving means for sequentially receiving output characteristics of an audio signal output from the wireless speaker within the predetermined time from the wireless speaker; The latest output characteristic received by the output characteristic receiving means is compared with the latest input characteristic measured by the input characteristic measuring means, and based on the comparison result, the listener who owns the controller moves away from the periphery of the wireless speaker.
  • a determination means for determining whether or not And an output stop instruction transmitting means for transmitting an output stop instruction for stopping the output of the audio signal to the wireless speaker when the determination means determines that the listener has moved away from the periphery of the wireless speaker.
  • the input characteristic measuring means sequentially measures the input volume level of the audio signal input to the microphone within the predetermined time as the input characteristic
  • the output characteristic receiving means is the wireless communication within the predetermined time.
  • the output volume level of the audio signal output from the speaker may be sequentially received as the output characteristic.
  • the determination unit is configured to detect the listener when the ratio of the latest input volume level measured by the input characteristic measurement unit to the latest output volume level received by the output characteristic reception unit decreases by a predetermined value or more. May be determined to be away from the periphery of the wireless speaker.
  • the input characteristic measuring means sequentially measures an input waveform of an audio signal input to the microphone within the predetermined time as the input characteristic
  • the output characteristic receiving means is connected to the wireless speaker within the predetermined time.
  • the output waveform of the output audio signal may be sequentially received as the output characteristic.
  • the determination unit is configured to detect the listener when the delay time of the latest input waveform measured by the input characteristic measurement unit with respect to the latest output waveform received by the output characteristic reception unit exceeds a predetermined value. May be determined to be away from the periphery of the wireless speaker.
  • the audio signal output from the wireless speaker is compared with the audio signal input to the microphone of the controller, and from this comparison result, it is determined whether or not the listener carrying the controller has moved away from the wireless speaker periphery. ing. Then, when it is determined that the listener is away from the vicinity of the wireless speaker, the output of the audio signal from the wireless speaker is stopped. For this reason, if the listener in the room where the wireless speaker that is outputting the audio signal exits without stopping the output of the audio signal, the output of the audio signal can be automatically stopped, which is wasteful. Therefore, it is possible to reduce power consumption by suppressing the output of a simple audio signal.
  • 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 sequence diagram for explaining the operation of the wireless audio system according to the first embodiment of the present invention.
  • FIG. 3 is a schematic functional configuration diagram of the wireless speaker 1.
  • FIG. 4 is a flowchart for explaining the operation of the wireless speaker 1.
  • FIG. 5 is a schematic functional configuration diagram of the audio controller 2.
  • FIG. 6 is a flowchart for explaining the operation of the audio controller 2.
  • FIG. 7 is a sequence diagram for explaining the operation of the wireless audio system according to the second embodiment of the present invention.
  • FIG. 8 is a schematic functional configuration diagram of the wireless speaker 1a.
  • FIG. 9 is a flowchart for explaining the operation of the wireless speaker 1a.
  • FIG. 10 is a schematic functional configuration diagram of the audio controller 2a.
  • FIG. 11 is a flowchart for explaining the operation of the audio controller 2a.
  • FIG. 1 is a schematic configuration diagram of a wireless audio system according to the first embodiment of the present invention.
  • the wireless audio system includes a plurality of wireless speakers 1-1 to 1-3 (hereinafter also simply referred to as wireless speakers 1) each provided with an ID, and a mobile phone equipped with a microphone.
  • the audio controller 2 is a terminal, and a media server 3 and an access point 4 connected to a network 5 are configured.
  • the wireless speakers 1-1 to 1-3 are installed in the individual rooms A to C, respectively.
  • the wireless speaker 1 is connected to the audio controller 2 and the media server 3 via the access point 4, acquires music data from the media server 3 in accordance with the playback instruction received from the audio controller 2, plays back the audio data, and outputs it. .
  • the wireless speaker 1 sequentially measures the output volume level of the audio signal output from the wireless speaker 1 within a predetermined time, and sequentially receives the input volume level of the audio signal from the audio controller 2. Then, the latest input volume level received is compared with the latest measured output volume level to determine whether the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed. If it is determined, the audio signal output is stopped.
  • the audio controller 2 is also connected to the wireless speaker 1 and the media server 3 via the access point 4, and includes a playback instruction including designation of music data selected by the listener from music data stored in the media server 3. Is transmitted to the output destination wireless speaker 1 of the music data.
  • the audio controller 2 sequentially measures the input volume level of the audio signal input to the microphone within a predetermined time, and transmits the music data to the output destination wireless speaker 1.
  • FIG. 2 is a flowchart for explaining the operation of the wireless audio system according to the present embodiment.
  • a case where a listener carrying the audio controller 2 enjoys music using the wireless speaker 1-1 installed in the A room is described as an example.
  • the audio controller 2 performs a music selection operation with designation of the music data to be reproduced and the ID of the wireless speaker 1-1 that is the output destination of the music data from the listener in the room A carrying the audio controller 2.
  • a reproduction instruction accompanied by designation of the music data to be reproduced and the ID of the wireless speaker 1-1 is broadcast on the network 5 (S101).
  • the microphone included in the audio controller 2 is turned on (S102).
  • the wireless speaker 1-1 when the wireless speaker 1-1 receives a playback instruction from the network 5 with the designation of the ID of the wireless speaker 1-1, the wireless speaker 1-1 sends a music data request with the designation of the music data designated by the reproduction instruction to the media. It transmits to the server 3 (S103). In response to this, the media server 3 identifies the song data specified by the song data request received from the wireless speaker 1-1 from the song data stored in the media server 3, and this song data. Is transmitted to the wireless speaker 1-1 (S104). When the wireless speaker 1-1 receives the music data from the media server 3, the wireless speaker 1-1 starts reproducing the music data as an audio signal and outputting the reproduced audio signal (S105). Further, the wireless speaker 1-1 starts measuring the output volume level Vout of the audio signal output within a predetermined time T2 (for example, 1 second) at a predetermined interval T1 (for example, 1 second) (S106).
  • T2 for example, 1 second
  • T1 for example, 1 second
  • the audio controller 2 detects that the audio signal output from the wireless speaker 1-1 is input to the microphone included in the own audio controller 2 (S107), the audio controller 2 falls within a predetermined time T2 every predetermined interval T1. Measurement of the input volume level Vin of the audio signal input to the microphone is started (S108). Then, every time the input volume level Vin is newly measured, the audio controller 2 notifies the input volume level Vin (Vin notification) with the designation of the newly measured input volume level Vin and the ID of the wireless speaker 1-1. Is broadcast on the network 5 (S109).
  • the wireless speaker 1-1 starts receiving the input volume level notification accompanying the designation of the ID of the wireless speaker 1-1 from the network 5 (S110).
  • the output volume level Vout newly measured by the own wireless speaker 1-1 of the input volume level Vin included in the newly received input volume level notification.
  • the volume level ratio Vin / Vout indicating the ratio of the volume level is obtained, and the change in the volume level ratio Vin / Vout is monitored (S111).
  • the listener carrying the audio controller 2 leaves the room A (S112), thereby reducing the input volume level Vin of the audio signal input to the microphone of the audio controller 2, and as a result, the wireless speaker 1- It is assumed that the sound volume level ratio Vin / Vout calculated in 1 is rapidly decreased.
  • the wireless speaker 1-1 detects that the volume level ratio Vin / Vout has dropped by a predetermined value P (for example, 5 dB) within a predetermined time T3 (for example, 4 to 6 seconds) (S113), the listener leaves the room A.
  • the value of the volume volume Vol of the own wireless speaker 1-1 is registered as resume information, and the volume volume Vol is changed to a zero value to stop the output of the audio signal (S114). Thereafter, it waits for a predetermined timeout time T4 (for example, 3 minutes) to elapse.
  • the listener carrying the audio controller 2 enters the room A again before the timeout time T4 has elapsed (S115).
  • the audio controller 2 receives a recovery operation accompanied by the designation of the ID of the wireless speaker 1-1 from the listener (S116)
  • the audio controller 2 broadcasts a restoration instruction accompanied by the designation of the ID of the wireless speaker 1-1 on the network 5 ( S117).
  • the wireless speaker 1-1 When the wireless speaker 1-1 receives a recovery instruction from the network 5 specifying the ID of its own wireless speaker 1-1 before the timeout time T4 elapses after the output of the audio signal is stopped, the value of the volume volume Vol is set to The value is changed from the zero value to the value registered as the resume information, and the output of the audio signal is restarted (S118).
  • the wireless speaker 1-1 detects that the volume level ratio Vin / Vout has decreased by a predetermined value P or more within the predetermined time T3 (S120), the wireless speaker 1-1 determines that the listener has left the A room, and the own wireless speaker 1-1. The volume volume Vol is registered as resume information, and the volume volume Vol is changed to a zero value to stop the output of the audio signal (S121). Then, it waits for the timeout time T4 to elapse.
  • the wireless speaker 1-1 detects the timeout (S122) and stops the reproduction of the music data to the audio signal. The power is turned off (S123).
  • FIG. 3 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 a wireless LAN adapter, and a speaker. This is realized by 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 wireless network interface unit 11, an instruction receiving unit 12, a music data acquisition unit 13, a music data storage unit 14, a music data playback unit 15, and an output.
  • a volume level measuring unit 16, an input volume level receiving unit 17, an exit determination unit 18, and a main control unit 19 are provided.
  • the wireless network interface unit 11 is an interface for communicating with the audio controller 2 via the access point 4 and communicating with the media server 3 connected to the network 5.
  • the instruction receiving unit 12 receives various instructions to which the ID of the own wireless speaker 1 is assigned from the audio controller 2 via the wireless network interface unit 11.
  • the music data acquisition unit 13 transmits a music data request including designation of music data to be played back to the media server 3 via the wireless network interface unit 11 and acquires the music data to be played from the media server 3.
  • the music data storage unit 14 stores the music data acquired by the music data acquisition unit 13 from the media server 3.
  • the music data reproduction unit 15 reproduces the music data stored in the music data storage unit 14 as an audio signal and outputs the audio signal from the speaker unit 10.
  • the output volume level measuring unit 16 averages the output volume of the audio signal output from the speaker unit 10 by the music data reproducing unit 15 within a predetermined time T2 (for example, 1 second) every predetermined interval T1 (for example, 1 second).
  • the output volume level Vout is measured.
  • the input volume level receiving unit 17 receives the input volume level notification accompanying the ID of the own wireless speaker 1 periodically transmitted from the audio controller 2 via the wireless network interface unit 11.
  • the leaving determination unit 18 outputs the input volume level Vin included in the input volume level notification.
  • a volume level ratio Vin / Vout indicating a ratio to the latest output volume level Vout measured by the volume level measuring unit 16 is obtained. Based on the change in the volume level ratio Vin / Vout, it is determined whether or not the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed.
  • the main control unit 19 comprehensively controls each unit 10 to 18 of the wireless speaker 1. Further, the main control unit 19 controls the reproduction / output of the music data by the music data reproduction unit 15 and the power on / off based on the determination result in the leaving determination unit 18.
  • FIG. 4 is a flowchart for explaining the operation of the wireless speaker 1. This flow is started when the instruction receiving unit 12 receives a reproduction instruction to which the ID of its own wireless speaker 1 is given from the audio controller 2 via the wireless network interface unit 11.
  • the instruction receiving unit 12 passes the received reproduction instruction to the main control unit 19.
  • the main control unit 19 notifies the music data acquisition unit 13 of the music data to be played that is designated by the playback instruction.
  • the music data acquisition unit 13 transmits a music data request including the music data designation notified from the main control unit 19 to the media server 3 via the wireless network interface unit 11 (S200).
  • the music data acquisition unit 13 receives the music data from the media server 3 and stores it in the music data storage unit 14 (S201). Further, the main control unit 19 is notified of the completion of the music data acquisition. In response to this, the main control unit 19 notifies the music data playback unit 15 of the music data to be played back.
  • the music data playback unit 15 reads the music data to be played back from the music data storage unit 14 and plays it back as an audio signal, and outputs the played back audio signal from the speaker unit 10 (S202).
  • the output volume level measuring unit 16 is output from the speaker unit 10 by the music data reproducing unit 15 within the predetermined time T2 at every predetermined interval T1.
  • the output volume level Vout which is the average value of the output volume of the audio signal, is measured (S203).
  • the main control unit 19 ends this flow.
  • the input volume level receiving unit 17 receives the ID of its own wireless speaker 1 periodically transmitted from the audio controller 2 until the audio data reproduction by the music data reproducing unit 15 is completed (NO in S205).
  • the accompanying input volume level notification (Vin notification) is received via the wireless network interface unit 11 (YES in S204)
  • the input volume level Vin included in the input volume level notification is passed to the leaving determination unit 18.
  • the leaving determination unit 18 receives the volume level ratio Vin indicating the ratio of the input volume level Vin received from the input volume level receiving unit 17 to the latest output volume level Vout measured by the output volume level measuring unit 16. / Vout is calculated and stored (S206).
  • the leaving determination unit 18 determines whether or not the volume level ratio Vin / Vout calculated before a predetermined time T3 (for example, 4 to 6 seconds) is stored (S207). If the volume level ratio Vin / Vout calculated before the predetermined time T3 is not stored (NO in S207), the process returns to S204.
  • a predetermined time T3 for example, 4 to 6 seconds
  • the leaving determination unit 18 calculates the volume level ratio Vin / Vout calculated before the predetermined time T3.
  • the volume level ratio Vin / Vout newly calculated this time is compared, and the volume level ratio Vin / Vout newly calculated this time is determined from the volume level ratio Vin / Vout calculated before the predetermined time T3 by a predetermined value P. It is determined whether or not it has decreased (for example, 5 dB) (S208). If the volume level ratio Vin / Vout newly calculated this time has not decreased by a predetermined value P or more from the volume level ratio Vin / Vout calculated before the predetermined time T3 (NO in S208), the process returns to S204.
  • the leaving determination unit 18 Notifies the main control unit 19 to that effect.
  • the main control unit 19 registers the value of the volume volume Vol of the music data playback unit 15 as resume information (S209), changes the volume volume Vol of the music data playback unit 15 to zero value, The audio signal output from the speaker unit 10 is stopped (S210). At this time, the output volume level measuring unit 16 may stop measuring the output volume level Vout.
  • the main control unit 19 is in a period until the audio signal reproduction by the music data reproduction unit 15 is completed (NO in S215) and until a time-out occurs after a predetermined timeout time T4 (for example, 3 minutes). In the meantime (NO in S213), it waits to receive a recovery instruction from the audio controller 2 via the wireless network interface unit 11 and the instruction receiving unit 12 (S211).
  • the instruction receiving unit 12 receives a recovery instruction from the audio controller 2 via the wireless network interface unit 11 and specifying the ID of the own wireless speaker 1 (YES in S211), the instruction receiving unit 12 notifies the main control unit 19 of this.
  • the main control unit 19 changes the volume volume Vol of the music data playback unit 15 from the zero value to the value registered as the resume information, and resumes the audio signal output from the speaker unit 10. (S212).
  • the measurement of the volume level Vout is stopped while the output of the audio signal output from the speaker unit 10 is stopped, the measurement of the output volume level Vout by the output volume level measuring unit 16 is resumed. Thereafter, the process returns to S204.
  • the recovery instruction is not received from the audio controller 2 via the wireless network interface unit 11 and the instruction receiving unit 12 until the audio signal reproduction by the music data reproducing unit 15 is completed (NO in S215) (S211). NO), when a time-out occurs due to the elapse of the predetermined time-out time T4 (YES in S213), the main control unit 19 causes the music data playback unit 15 to stop playing the audio signal from the music data, and then turns the main power supply off. It is turned off (S214), and this flow ends.
  • the main control unit 19 does not receive a recovery instruction from the audio controller 2 via the wireless network interface unit 11 and the instruction receiving unit 12 before the predetermined timeout time T4 has elapsed (NO in S213) (S211). If NO in step S215, the audio data reproduction by the music data reproduction unit 15 is completed (YES in step S215).
  • FIG. 5 is a schematic functional configuration diagram of the audio controller 2.
  • the functional configuration of the audio 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 communication device such as a wireless LAN adapter.
  • a portable computer such as a smart phone or a tablet PC having a microphone
  • the CPU loads a predetermined program from the auxiliary storage device to the memory and executes the program.
  • the audio controller 2 includes a microphone unit 20, a wireless network interface unit 21, a graphical user interface unit 22, a reproduction instruction transmission unit 23, a recovery instruction transmission unit 24, and an input volume level measurement unit 25.
  • the input volume level notification unit 26 and the main control unit 27 are provided.
  • the wireless network interface unit 21 is an interface for communicating with the wireless speaker 1 via the access point 4.
  • the graphical user interface unit 22 is an interface for displaying information and receiving various operations from the user.
  • the reproduction instruction transmission unit 23 broadcasts a reproduction instruction accompanied by designation of the music data to be reproduced and the ID of the output destination wireless speaker 1 of the music data from the wireless network interface unit 21.
  • the restoration instruction transmitting unit 24 broadcasts a restoration instruction accompanied with designation of the ID of the output destination wireless speaker 1 of the music data from the wireless network interface unit 21.
  • the input volume level measuring unit 25 is an input volume level Vin that is an average value of the input volumes of the audio signals input to the microphone unit 20 within a predetermined time T2 (for example, 1 second) every predetermined interval T1 (for example, 1 second). Measure.
  • the input volume level notification unit 26 notifies the input volume level with the designation of the input volume level Vin and the ID of the output destination wireless speaker 1 of the music data every time the input volume level measurement unit 25 measures the input volume level Vin. Is transmitted from the wireless network interface unit 21 by broadcast transmission.
  • the main control unit 27 comprehensively controls each unit 20 to 26 of the audio controller 2.
  • FIG. 6 is a flowchart for explaining the operation of the audio controller 2. This flow is started when the main control unit 27 receives a music selection operation accompanied by designation of the music data to be reproduced and the ID of the output destination wireless speaker 1 of the music data from the listener via the graphical user interface unit 22. .
  • the main control unit 27 passes the music data to be reproduced and the ID of the output destination wireless speaker 1 of the music data to the reproduction instruction transmitting unit 23.
  • the reproduction instruction transmitting unit 23 broadcasts a reproduction instruction accompanied by designation of the music data to be reproduced and the ID of the output destination wireless speaker 1 of the music data from the wireless network interface unit 21 (S300).
  • the main control unit 27 turns on the microphone unit 20 (S301) and waits for an audio signal to be input to the microphone unit 20 (S302). If an audio signal is input to the microphone unit 20 (YES in S302), the input volume level measuring unit 25 is instructed to start measuring the input volume level Vin, and the input volume level notifying unit 26 outputs music data. The ID of the destination wireless speaker 1 is notified to start transmission of the input volume level notification. In response to this, the input volume level measuring unit 25 measures the input volume level Vin that is an average value of the input volumes of the audio signals input to the microphone unit 20 within the predetermined time T2 at every predetermined interval T1.
  • the input volume level notifying unit 26 specifies the input volume level with the designation of the input volume level Vin and the ID of the music data output destination wireless speaker 1.
  • a level notification is broadcast from the wireless network interface unit 21 (S303).
  • the main control unit 27 receives a restoration operation accompanied by designation of the ID of the music data output destination wireless speaker 1 from the listener via the graphical user interface unit 22 (YES in S304), the output destination wireless speaker. 1 ID is passed to the recovery instruction transmission unit 24.
  • the recovery instruction transmission unit 24 broadcasts a recovery instruction accompanying the designation of the ID of the output destination wireless speaker 1 from the wireless network interface unit 21 (S305).
  • the input volume level measurement unit 25 ends the measurement of the input volume level Vin.
  • the input volume level notification unit 26 is instructed to end transmission of the input volume level notification.
  • the input volume level measuring unit 25 ends the measurement of the input volume level Vin.
  • the input volume level notification unit 26 ends the broadcast transmission of the input volume level notification (S307).
  • the main control unit 27 turns off the microphone unit 20 (S308) and ends this flow.
  • the output volume level Vout of the audio signal output from the speaker unit 10 of the wireless speaker 1 is compared with the input volume level Vin of the audio signal input to the microphone unit 20 of the audio controller 2. It is determined from the volume level ratio Vin / Vout whether or not the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed. When it is determined that the listener has left the room, the output of the audio signal from the wireless speaker 1 is stopped. For this reason, when the listener in the installation room of the wireless speaker 1 that is outputting the audio signal leaves the audio signal without stopping the output of the audio signal, the output of the audio signal can be automatically stopped. The power consumption can be reduced by suppressing the output of the audio signal.
  • the wireless speaker 1 when the wireless speaker 1 receives a restoration instruction from the audio controller 2 after the audio signal output is stopped and before the predetermined time-out time T4 has elapsed, the volume volume Vol is set to the volume before the audio signal output is stopped. Return to the state and resume audio signal output.
  • the time-out time T4 has elapsed without receiving a recovery instruction from the audio controller 2
  • reproduction of the music data to the audio signal is stopped and the power is turned off. Therefore, if the listener carrying the audio controller 2 returns immediately after leaving the room where the wireless speaker 1 is installed, the music data can be enjoyed with a simple operation. Since the power source of the wireless speaker 1 can be automatically turned off, the power consumption of the wireless speaker 1 can be efficiently reduced.
  • the listener carrying the audio controller 2 determines that the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed when the volume level ratio Vin / Vout decreases by a predetermined value P or more within the predetermined time T3.
  • a predetermined value P or more within the predetermined time T3 it is determined that the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed when the volume level ratio Vin / Vout decreases by a predetermined value P or more within the predetermined time T3.
  • the output volume level Vout of the audio signal output from the speaker unit 10 of the wireless speaker 1 is compared with the input volume level Vin of the audio signal input to the microphone unit 20 of the audio controller 2. From the volume level ratio Vin / Vout of both, it is determined whether or not the listener carrying the audio controller 2 has left the room where the wireless speaker 1 is installed.
  • the audio controller 2 is carried on the basis of the comparison result between the output characteristic of the audio signal output from the speaker unit 10 of the wireless speaker 1 and the input characteristic of the audio signal input to the microphone unit 20 of the audio controller 2. What is necessary is just to judge whether the listener to perform has left
  • the wireless speaker 1 measures the output waveform of the audio signal output from the speaker unit 10 within a predetermined time T2 at every predetermined interval T1, and the audio controller 2 within the predetermined time T2 at every predetermined interval T1.
  • the input waveform of the audio signal input to the microphone unit 20 is measured and transmitted to the wireless speaker 1.
  • the wireless speaker 1 the latest measured output waveform is compared with the latest input waveform received from the audio controller 2, and whether or not the delay time (phase difference) of the input waveform with respect to the output waveform is equal to or longer than a predetermined time. Based on this, it is determined whether or not the listener carrying the audio controller 2 has moved away from the periphery of the wireless speaker 1.
  • the wireless audio system according to the present embodiment differs from the wireless audio system according to the first embodiment shown in FIG. 1 in that wireless speakers 1a-1 to 1a-3 are used instead of the wireless speakers 1-1 to 1-3. (Hereinafter, also simply referred to as a wireless speaker 1a) and an audio controller 2a in place of the audio controller 2. Others are the same as those of the wireless audio system according to the first embodiment shown in FIG.
  • the wireless speaker 1a is connected to the audio controller 2a and the media server 3 via the access point 4, and acquires music data from the media server 3 in accordance with a playback instruction received from the audio controller 2a, and plays back and outputs it as an audio signal. To do. Further, the wireless speaker 1a sequentially measures the output volume level of the audio signal output from the wireless speaker 1a within a predetermined time, and transmits it to the audio controller 2a that is the reproduction instruction transmission source. Also, the output of the audio signal is stopped according to the output stop instruction of the audio controller 2a.
  • the audio controller 2 a is also connected to the wireless speaker 1 a and the media server 3 via the access point 4, and includes a playback instruction including designation of song data selected by the listener from the song data stored in the media server 3. Is transmitted to the output destination wireless speaker 1a of the music data.
  • the audio controller 2a sequentially measures the input volume level of the audio signal input to the microphone within a predetermined time, and sequentially receives the output volume level of the audio signal from the wireless speaker 1a. Then, the input volume level is compared with the output volume level to determine whether or not the listener carrying the audio controller 2a has left the room where the wireless speaker 1a is installed, and the listener leaves the room where the wireless speaker 1a is installed. If it is determined that the audio signal has been output, an audio signal output stop instruction is transmitted to the music data output destination wireless speaker 1a.
  • FIG. 7 is a flowchart for explaining the operation of the wireless audio system according to the present embodiment.
  • a case where a listener carrying the audio controller 2a enjoys music using the wireless speaker 1a-1 installed in the A room is described as an example.
  • the audio controller 2a performs a music selection operation with designation of the music data to be reproduced and the ID of the wireless speaker 1a-1 that is the output destination of the music data from the listener in the room A carrying the audio controller 2a.
  • a reproduction instruction accompanied by designation of the music data to be reproduced and the ID of the wireless speaker 1a-1 is broadcast on the network 5 (S151).
  • the microphone included in the audio controller 2a is turned on (S152).
  • the wireless speaker 1a-1 when the wireless speaker 1a-1 receives from the network 5 a reproduction instruction accompanied by the designation of the ID of the wireless speaker 1a-1, the wireless speaker 1a-1 sends a music data request accompanied by the designation of the music data designated by the reproduction instruction to the media. It transmits to the server 3 (S153). In response to this, the media server 3 identifies the music data specified by the music data request received from the wireless speaker 1a-1 from the music data stored in the media server 3, and this music data. Is transmitted to the wireless speaker 1a-1 (S154). When the wireless speaker 1a-1 receives the music data from the media server 3, the wireless speaker 1a-1 starts reproducing the music data as an audio signal and outputting the reproduced audio signal (S155).
  • the wireless speaker 1a-1 starts measuring the output volume level Vout of the audio signal output within the predetermined time T2 (for example, 1 second) at every predetermined interval T1 (for example, 1 second) (S156). Each time the output volume level Vout is newly measured, an output volume level notification (Vout notification) with the newly measured output volume level Vout is transmitted to the audio controller 2a that is the transmission source of the reproduction instruction. (S157).
  • the audio controller 2a detects that the audio signal output from the wireless speaker 1a-1 is input to the microphone included in the own audio controller 2a (S158), the audio controller 2a is within a predetermined time T2 at every predetermined interval T1. Measurement of the input volume level Vin of the audio signal input to the microphone is started (S159), and reception of the output volume level notification from the wireless speaker 1a-1 is started (S160). Each time the audio controller 2a newly receives the output volume level notification, the audio controller 2a newly inputs the output volume level Vout included in the newly received output volume level notification. A volume level ratio Vin / Vout indicating a ratio of the volume level Vin is obtained, and a change in the volume level ratio Vin / Vout is monitored (S161).
  • the listener carrying the audio controller 2a leaves the room A (S162), thereby reducing the input volume level Vin of the audio signal input to the microphone of the audio controller 2a.
  • the audio controller 2a It is assumed that the calculated volume level ratio Vin / Vout rapidly decreases.
  • the audio controller 2a detects that the volume level ratio Vin / Vout has decreased by a predetermined value P (for example, 5 dB) or more within a predetermined time T3 (for example, 4 to 6 seconds) (S163), the listener leaves the room A.
  • the output stop instruction accompanied with the designation of the ID of the output destination wireless speaker 1a-1 of the music data is broadcasted (S164). Thereafter, it waits for a predetermined timeout time T4 (for example, 3 minutes) to elapse.
  • the wireless speaker 1a-1 when the wireless speaker 1a-1 receives an output stop instruction accompanied by the designation of the ID of the own wireless speaker 1a-1 from the audio controller 2a, the value of the volume volume Vol of the own wireless speaker 1a-1 is registered as resume information. At the same time, the output of the audio signal is stopped by changing the volume volume Vol to zero (S165). At this time, the wireless speaker 1a-1 may stop measuring the output volume level Vout.
  • the listener carrying the audio controller 2a reenters the room A (S166).
  • the audio controller 2a accepts a recovery operation with the designation of the ID of the wireless speaker 1a-1 from the listener before the timeout time T4 elapses (S167)
  • the audio controller 2a issues a restoration instruction with the designation of the ID of the wireless speaker 1a-1 to the network. 5 is broadcast (S168).
  • the wireless speaker 1a-1 When the wireless speaker 1a-1 receives a restoration instruction accompanied by the designation of the ID of the wireless speaker 1a-1 from the audio controller 2a, the wireless speaker 1a-1 changes the value of the volume volume Vol from a zero value to a value registered as resume information.
  • the audio signal output is resumed (S169).
  • the wireless speaker 1a-1 restarts the measurement of the output volume level Vout.
  • the listener carrying the audio controller 2a leaves the room A again (S170), thereby reducing the input volume level Vin of the audio signal input to the microphone of the audio controller 2a, and as a result, the audio controller 2a.
  • the sound volume level ratio Vin / Vout calculated in (1) is rapidly reduced.
  • the audio controller 2a detects that the volume level ratio Vin / Vout has decreased by a predetermined value P or more within the predetermined time T3 (S171)
  • the audio controller 2a determines that the listener has left the room A, and the music data output destination wireless speaker An output stop instruction accompanied with the ID designation of 1a-1 is broadcast (S172).
  • the wireless speaker 1a-1 may stop measuring the output volume level Vout. Thereafter, it waits for a predetermined timeout time T4 (for example, 3 minutes) to elapse.
  • the wireless speaker 1a-1 receives an output stop instruction accompanied by the designation of the ID of the own wireless speaker 1a-1 from the audio controller 2a, the value of the volume volume Vol of the own wireless speaker 1a-1 is registered as resume information. At the same time, the sound volume volume Vol is changed to zero, and the output of the audio signal is stopped (S173).
  • the audio controller 2a issues a power-off instruction with the designation of the ID of the wireless speaker 1a-1. Broadcast transmission is performed on the network 5 (S175).
  • the wireless speaker 1a-1 when the wireless speaker 1a-1 receives from the audio controller 2a a power-off instruction accompanied by designation of the ID of the wireless speaker 1a-1, the wireless speaker 1a-1 stops reproduction of the music data to the audio signal and turns off the power. (S176).
  • FIG. 8 is a schematic functional configuration diagram of the wireless speaker 1a.
  • the functional configuration of the wireless speaker 1a 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 a wireless LAN adapter, and a speaker. This is realized by loading a predetermined program from the auxiliary storage device onto the memory and executing it.
  • the wireless speaker 1a includes a speaker unit 10, a wireless network interface unit 11, an instruction receiving unit 12, a music data acquisition unit 13, a music data storage unit 14, a music data reproduction unit 15, and an output.
  • a volume level measurement unit 16, an output volume level notification unit 30, and a main control unit 31 are provided.
  • the output volume level notifying unit 30 is reproducing the output volume level notification accompanied with the output volume level Vout to the audio signal by the music data reproducing unit 15 every time the output volume level measuring unit 16 measures the output volume level Vout. Is transmitted via the wireless network interface unit 11 to the audio controller 2a that is the transmission source of the reproduction instruction for the music data.
  • the main control unit 31 comprehensively controls the units 10 to 16 and 30 of the wireless speaker 1a. Further, the main control unit 31 controls reproduction / output of music data and power on / off by the music data reproduction unit 15 based on an instruction received from the audio controller 2 a via the instruction reception unit 12.
  • FIG. 9 is a flowchart for explaining the operation of the wireless speaker 1a. This flow is started when the instruction receiving unit 12 receives a playback instruction to which the ID of its own wireless speaker 1a is assigned from the audio controller 2a via the wireless network interface unit 11.
  • the instruction receiving unit 12 passes the received reproduction instruction to the main control unit 31.
  • the main control unit 31 notifies the output volume level notification unit 30 of the address of the audio controller 2a that is the transmission source of the reproduction instruction, and the reproduction target musical piece data designated by the reproduction instruction
  • the data acquisition unit 13 is notified.
  • the music data acquisition unit 13 transmits a music data request including the music data designation notified from the main control unit 31 to the media server 3 via the wireless network interface unit 11 (S250).
  • the music data acquisition unit 13 receives the music data from the media server 3 and stores it in the music data storage unit 14 (S251). Further, the main control unit 31 is notified of the completion of the music data acquisition. In response to this, the main control unit 31 notifies the music data playback unit 15 of the music data to be played back. Then, the music data reproduction unit 15 reads the music data to be reproduced from the music data storage unit 14 and reproduces it as an audio signal, and outputs the reproduced audio signal from the speaker unit 10 (S252).
  • the output volume level measuring unit 16 is output from the speaker unit 10 by the music data reproducing unit 15 within the predetermined time T2 at every predetermined interval T1.
  • An output volume level Vout which is an average value of the output volume of the audio signal is measured.
  • the output volume level notification unit 30 notifies the output volume level notification with the output volume level Vout via the wireless network interface unit 11 every time the output volume level Vout is measured by the output volume level measurement unit 16.
  • Main control unit 3 1 is transmitted to the audio controller 2a specified by the address notified from 1 (S253).
  • the main control unit 31 instructs the audio controller 2a to stop the output through the wireless network interface unit 11 and the instruction receiving unit 12 until the audio signal reproduction by the music data reproducing unit 15 is completed (NO in S257). Is received (S254). Then, when the instruction receiving unit 12 receives the output stop instruction to which the ID of its own wireless speaker 1a is given from the audio controller 2a via the wireless network interface unit 11 (YES in S254), the instruction receiving unit 12 sends it to the main control unit 31. hand over.
  • the main control unit 31 registers the value of the volume volume Vol of the music data playback unit 15 as resume information (S255), changes the volume volume Vol of the music data playback unit 15 to zero value, The output of the audio signal from the speaker unit 10 is stopped (S256). At this time, the output volume level measuring unit 16 may stop measuring the output volume level Vout.
  • the main control unit 31 sends a restoration instruction or power supply from the audio controller 2a via the wireless network interface unit 11 and the instruction receiving unit 12 until the audio signal reproduction by the music data reproduction unit 15 ends (NO in S262). It waits to receive an off instruction (S258, S260).
  • the instruction receiving unit 12 receives the recovery instruction to which the ID of the own wireless speaker 1a is assigned from the audio controller 2a via the wireless network interface unit 11 (YES in S258), the instruction receiving unit 12 passes this to the main control unit 31. .
  • the main control unit 31 changes the volume volume Vol of the music data playback unit 15 from the zero value to the value registered as the resume information, and resumes the audio signal output from the speaker unit 10. (S259).
  • the measurement of the volume level Vout is stopped while the output of the audio signal output is stopped, the measurement of the output volume level Vout by the output volume level measuring unit 16 is resumed. Thereafter, the process returns to S254.
  • the instruction receiving unit 12 when the instruction receiving unit 12 receives a power-off instruction to which the ID of its own wireless speaker 1a is assigned from the audio controller 2a via the wireless network interface unit 11 (YES in S260), the instruction receiving unit 12 sends this to the main control unit 31. hand over. In response to this, the main control unit 31 causes the music data playback unit 15 to stop playback of the music data to the audio signal, and then turns off the main power supply (S261) and ends this flow.
  • the main control unit 31 ends this flow.
  • FIG. 10 is a schematic functional configuration diagram of the audio controller 2a.
  • the functional configuration of the audio controller 2a 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 communication device such as a wireless LAN adapter.
  • a portable computer such as a smart phone or a tablet PC having a microphone
  • the CPU loads a predetermined program from the auxiliary storage device to the memory and executes the program.
  • the audio controller 2a includes a microphone unit 20, a wireless network interface unit 21, a graphical user interface unit 22, a reproduction instruction transmission unit 23, a recovery instruction transmission unit 24, and an input volume level measurement unit 25. , An output stop instruction transmission unit 40, a power-off instruction transmission unit 41, an output volume level reception unit 42, an exit determination unit 43, and a main control unit 44.
  • the output stop instruction transmission unit 40 broadcasts an output stop instruction accompanied by designation of the ID of the output destination wireless speaker 1a of the music data from the wireless network interface unit 21.
  • the power-off instruction transmission unit 41 broadcasts a power-off instruction accompanied by designation of the ID of the output destination wireless speaker 1a of the music data from the wireless network interface unit 21.
  • the output volume level receiving unit 42 receives an output volume level notification periodically transmitted from the wireless speaker 1a via the wireless network interface unit 21.
  • the leaving determination unit 43 is measured by the input volume level measurement unit 25 for the output volume level Vout included in the output volume level notification every time the output volume level reception unit 42 newly receives the output volume level notification. Further, a volume level ratio Vin / Vout indicating the ratio of the latest input volume level Vin is obtained. Based on the change in the volume level ratio Vin / Vout, it is determined whether or not the listener carrying the audio controller 2a has left the room where the music data output destination wireless speaker 1a is installed.
  • the main control unit 44 controls the respective units 20 to 25 and 40 to 43 of the audio controller 2a in an integrated manner.
  • FIG. 11 is a flowchart for explaining the operation of the audio controller 2a. This flow is started when the main control unit 44 receives a music selection operation accompanied by designation of the music data to be reproduced and the ID of the output destination wireless speaker 1a of the music data from the listener via the graphical user interface unit 22. .
  • the main control unit 44 passes the music data to be reproduced and the ID of the output destination wireless speaker 1a of the music data to the reproduction instruction transmitting unit 23.
  • the reproduction instruction transmitting unit 23 broadcasts a reproduction instruction accompanied by designation of the music data to be reproduced and the ID of the output destination wireless speaker 1a of the music data from the wireless network interface unit 21 (S350).
  • the main control unit 44 turns on the microphone unit 20 (S351) and waits for an audio signal to be input to the microphone unit 20 (S352). If an audio signal is input to the microphone unit 20 (YES in S352), the input volume level measuring unit 25 is instructed to start measurement. In response to this, the input volume level measuring unit 25 measures the input volume level Vin that is an average value of the input volumes of the audio signals input to the microphone unit 20 within the predetermined time T2 at every predetermined interval T1 (S353). ).
  • the output volume level receiving unit 42 receives the output volume level notification (Vout notification) periodically transmitted from the wireless speaker 1a via the wireless network interface unit 21 (YES in S354), this output volume level is received.
  • the output volume level Vout included in the level notification is passed to the leaving determination unit 43.
  • the leaving determination unit 43 receives the volume level ratio Vin indicating the ratio of the latest input volume level Vin measured by the input volume level measurement unit 25 to the output volume level Vout received from the output volume level receiving unit 42. / Vout is calculated and stored (S355).
  • the leaving determination unit 43 determines whether or not the volume level ratio Vin / Vout calculated before a predetermined time T3 (for example, 4 to 6 seconds) is stored (S356). If the volume level ratio Vin / Vout calculated before the predetermined time T3 is not stored (NO in S356), the process returns to S354.
  • a predetermined time T3 for example, 4 to 6 seconds
  • the leaving determination unit 43 calculates the volume level ratio Vin / Vout calculated before the predetermined time T3.
  • the volume level ratio Vin / Vout newly calculated this time is compared, and the volume level ratio Vin / Vout newly calculated this time is determined from the volume level ratio Vin / Vout calculated before the predetermined time T3 by a predetermined value P. It is determined whether or not it has decreased (for example, 5 dB) (S357). If the volume level ratio Vin / Vout newly calculated this time is not lower than the volume level ratio Vin / Vout calculated before the predetermined time T3 by a predetermined value P or more (NO in S357), the process returns to S354.
  • the control unit 44 is notified. In response to this, the main control unit 44 notifies the output stop instruction transmitting unit 40 of the ID of the output destination wireless speaker 1a of the music data. Then, the output stop instruction transmitting unit 40 broadcasts an output stop instruction accompanied with designation of the ID of the output destination wireless speaker 1a from the wireless network interface unit 21 (S358). At this time, the input volume level measurement unit 25 may stop measuring the input volume level Vin.
  • the main control unit 44 waits to receive a recovery operation from the listener via the graphical user interface unit 22 until a timeout occurs due to the elapse of a predetermined timeout time T4 (for example, 3 minutes) (NO in S361) ( S359).
  • a timeout time T4 for example, 3 minutes
  • the main control unit 44 When the main control unit 44 receives a recovery operation from the listener via the graphical user interface unit 22 (YES in S359), the main control unit 44 notifies the recovery instruction transmission unit 24 of the ID of the music data output destination wireless speaker 1a. Then, the recovery instruction transmission unit 24 broadcasts a recovery instruction with designation of the ID of the output destination wireless speaker 1a from the wireless network interface unit 21 (S360). When the measurement of the input volume level Vin is stopped, the input volume level measurement unit 25 resumes the measurement of the input volume level Vin. Thereafter, the process returns to S354.
  • the main control unit 44 instructs the music data output destination wireless speaker 1a to turn off the power. Notify the transmitter 41. Then, the power-off instruction transmission unit 41 broadcasts a power-off instruction accompanied with designation of the ID of the output destination wireless speaker 1a from the wireless network interface unit 21 (S362). Then, the main control unit 44 instructs the input volume level measuring unit 25 to end the measurement of the input volume level Vin. Receiving this, the input volume level measuring unit 25 ends the measurement of the input volume level Vin (S363). Thereafter, the main control unit 44 turns off the microphone unit 20 (S364) and ends this flow.
  • the input volume level measurement unit 25 measures the input volume level Vin. Instruct the end. Receiving this, the input volume level measuring unit 25 ends the measurement of the input volume level Vin (S363). Thereafter, the main control unit 44 turns off the microphone unit 20 (S364) and ends this flow.
  • the output volume level Vout of the audio signal output from the speaker unit 10 of the wireless speaker 1a and the audio signal input to the microphone unit 20 of the audio controller 2a is compared, and from the volume level ratio Vin / Vout of both, it is determined whether or not the listener carrying the audio controller 2a has left the room where the wireless speaker 1a is installed. Then, when it is determined that the listener has left the room, the output of the audio signal from the wireless speaker 1a is stopped. For this reason, when the listener in the installation room of the wireless speaker 1a that is outputting the audio signal leaves the audio signal without stopping the output of the audio signal, the output of the audio signal can be automatically stopped. The power consumption can be reduced by suppressing the output of the audio signal.
  • the wireless controller 1a when the audio controller 2a receives a recovery operation from the listener before a predetermined timeout period T4 has elapsed after transmitting an output stop instruction for stopping the output of the audio signal to the wireless speaker 1a, the wireless controller 1a A restoration instruction for resuming output of the audio signal is transmitted to the speaker 1a.
  • the wireless speaker 1a stops playing the music data to the audio signal and turns off the power to turn off the power. Send instructions.
  • the music data can be continuously enjoyed with a simple operation, but when the user leaves the room without returning, Since the power source of the wireless speaker 1a can be automatically cut off, the power consumption of the wireless speaker 1a can be efficiently reduced.
  • the listener carrying the audio controller 2a is connected to the wireless speaker 1a. It is determined that the user has left the installation room (S163 and S171 in FIG. 7 and S357 in FIG. 11).
  • the listener intentionally decreases the volume volume of the wireless speaker 1a, it is erroneously determined that the listener has left the room depending on the performance of the microphone unit 20 of the audio controller 2a. there's a possibility that. Therefore, even when the volume level ratio Vin / Vout decreases by a predetermined value P or more within the predetermined time T3, if the volume volume is less than the predetermined value, it may not be determined that the listener has left the room.
  • the output volume level Vout of the audio signal output from the speaker unit 10 of the wireless speaker 1a and the audio signal input to the microphone unit 20 of the audio controller 2a is compared, and from the volume level ratio Vin / Vout of both, it is determined whether or not the listener carrying the audio controller 2a has left the room where the wireless speaker 1a is installed.
  • the audio controller 2a is carried on the basis of the comparison result between the output characteristic of the audio signal output from the speaker unit 10 of the wireless speaker 1a and the input characteristic of the audio signal input to the microphone unit 20 of the audio controller 2a. What is necessary is just to determine whether or not the listener to be away from the periphery of the wireless speaker 1a.
  • the output waveform of the audio signal output from the speaker unit 10 within a predetermined time T2 is measured at a predetermined interval T1 and transmitted to the wireless speaker 1a.
  • the input waveform of the audio signal input to the microphone unit 20 within a predetermined time T2 is measured.
  • the measured latest input waveform is compared with the latest output waveform received from the wireless speaker 1a, and based on whether or not the delay time (phase difference) for the output waveform of the input waveform is equal to or greater than a predetermined time, It is determined whether or not the listener carrying the audio controller 2a has left the periphery of the wireless speaker 1a.
  • the audio controllers 2 and 2a broadcast various instructions to the wireless speakers 1 and 1a.
  • unicast transmission may be used instead of broadcast transmission.
  • the audio controllers 2 and 2a are connected to the wireless speakers 1 and 1a via the access point 4 and the network 5, but the present invention is not limited to this.
  • the audio controllers 2 and 2a and the wireless speakers 1 and 1a may be directly connected via a wireless network by short-range wireless communication such as a wireless LAN ad-hoc mode and Bluetooth (registered trademark).
  • the media server 3 is connected to the network 5, but the media server 3 may be connected to a wireless network.
  • the media server 3 may be built in the audio controllers 2 and 2a or any one of the wireless speakers 1 and 1a.
  • the wireless speakers 1 and 1a acquire music data from the audio controllers 2 and 2a.
  • the other wireless speakers 1 and 1a acquire music data from the wireless speakers 1 and 1a in which the media server 3 is built.

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PCT/JP2016/076849 2015-10-15 2016-09-12 ワイヤレススピーカ、コントローラ、ワイヤレスオーディオシステム、およびコンピュータで読み取り可能なプログラム Ceased WO2017064964A1 (ja)

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DE102018128202A1 (de) * 2018-11-12 2020-05-14 Sennheiser Electronic Gmbh & Co. Kg Audio-Wiedergabeanlage, Verfahren zur Konfiguration einer Audio-Wiedergabeanlage und Server für eine Audio-Wiedergabeanlage
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