WO2020208667A1 - Dispositif de commande de sortie audio et procédé de commande de sortie audio - Google Patents

Dispositif de commande de sortie audio et procédé de commande de sortie audio Download PDF

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Publication number
WO2020208667A1
WO2020208667A1 PCT/JP2019/015251 JP2019015251W WO2020208667A1 WO 2020208667 A1 WO2020208667 A1 WO 2020208667A1 JP 2019015251 W JP2019015251 W JP 2019015251W WO 2020208667 A1 WO2020208667 A1 WO 2020208667A1
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WO
WIPO (PCT)
Prior art keywords
time
control
audio output
face
control device
Prior art date
Application number
PCT/JP2019/015251
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English (en)
Japanese (ja)
Inventor
政博 秋田
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三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/015251 priority Critical patent/WO2020208667A1/fr
Priority to JP2021513033A priority patent/JP6887588B2/ja
Publication of WO2020208667A1 publication Critical patent/WO2020208667A1/fr

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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • 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

Definitions

  • the present invention relates to a voice output control device that controls a plurality of voice output devices mounted on a vehicle, and a voice output control method.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of stabilizing stereo reproduction.
  • the voice output control device is a voice output control device that performs real-time control for controlling a plurality of voice output devices mounted on a vehicle in real time based on the position of the face of a passenger on the vehicle.
  • Real-time when it is determined that the position fixing time, which is the time when the acquisition unit for acquiring the position of the person's face and the position of the face acquired by the acquisition unit are fixed, is longer than the predetermined time.
  • a plurality of voice output devices are intermittently controlled rather than real-time control based on the face position acquired by the acquisition unit. It is provided with a control unit that performs intermittent control to be controlled.
  • real-time control is performed when it is determined that the position fixing time is longer than a predetermined time, and intermittent when it is determined that the position fixing time is equal to or less than a predetermined time. Since control is performed, stabilization of stereo reproduction can be realized.
  • FIG. It is a block diagram which shows the structure of the audio output control apparatus which concerns on Embodiment 1.
  • FIG. It is a schematic diagram which shows the vehicle apparatus which concerns on Embodiment 2, and its periphery. It is a block diagram which shows the structure of the vehicle apparatus which concerns on Embodiment 2. It is a flowchart which shows the operation of the vehicle apparatus which concerns on Embodiment 2.
  • FIG. 1 is a block diagram showing a configuration of an audio output control device 1 according to a first embodiment of the present invention.
  • the vehicle on which the voice output control device 1 is mounted and which is the subject of attention will be described as “own vehicle”.
  • the voice output control device 1 of FIG. 1 is wirelessly or wiredly connected to a plurality of voice output devices 51 mounted on the own vehicle so as to be able to communicate with each other.
  • the plurality of audio output devices 51 are, for example, a plurality of speakers provided in the interior of the own vehicle.
  • the voice output control device 1 includes an acquisition unit 11 and a control unit 12.
  • the acquisition unit 11 acquires the position of the face of the passenger of the own vehicle.
  • the passenger of the own vehicle will be described as being the driver of the own vehicle.
  • an image analysis device that acquires the position of the face from the image of the driver captured by the camera, an interface thereof, or the like is applied to the acquisition unit 11.
  • the control unit 12 selectively performs real-time control and intermittent control for the plurality of audio output devices 51.
  • real-time control the control unit 12 controls a plurality of voice output devices 51 in real time based on the position of the face acquired by the acquisition unit 11.
  • the control unit 12 controls the plurality of voice output devices 51 intermittently rather than the real-time control based on the position of the face acquired by the acquisition unit 11. That is, in the intermittent control, the time interval for controlling the plurality of audio output devices 51 is longer than that in the real-time control.
  • the parameters related to the audio output timing and volume of each audio output device 51 are adjusted by the above real-time control and intermittent control. As a result, for example, stereo reproduction is performed in which a sound field or a sound image is formed with respect to the position of the face.
  • the positions of the plurality of audio output devices 51 are the default positions, and real-time control and intermittent control are selectively performed.
  • the positions of the plurality of audio output devices 51 are not limited to the default positions.
  • control unit 12 determines that the face position is fixed when the change of the face position acquired by the acquisition unit 11 per unit time is equal to or less than a predetermined value.
  • the unit time is, for example, 0.1 seconds
  • the predetermined value is, for example, 1 cm in the actual distance.
  • control unit 12 obtains the time during which the determination that the position is fixed continues as the position fixing time, and determines whether or not the position fixing time is larger than the predetermined time.
  • the predetermined time is, for example, 3 seconds.
  • the control unit 12 performs real-time control when it is determined that the position fixing time is longer than a predetermined time, and performs intermittent control when it is determined that the position fixing time is equal to or less than a predetermined time. ..
  • ⁇ Summary of Embodiment 1> According to the voice output control device 1 according to the first embodiment as described above, when it is determined that the position fixing time is longer than the predetermined time, real-time control is performed and the position fixing time is set in advance. Intermittent control is performed when it is determined that the time is less than or equal to the specified time. According to such a configuration, it is possible to appropriately perform intermittent control instead of always performing real-time control, so that stabilization of stereo reproduction can be realized. As a result, it is possible to prevent the passengers of the own vehicle other than the driver from feeling uncomfortable and uncomfortable. In addition, the processing load of the control unit 12 can be expected to be reduced.
  • FIG. 2 is a schematic view showing the vehicle device 1a and its surroundings according to the second embodiment of the present invention.
  • the same or similar components as those described above will be designated by the same or similar reference numerals, and different components will be mainly described.
  • the camera 53 connected to the vehicle device 1a captures an image of the interior 41 of the own vehicle.
  • the camera 53 is arranged in the own vehicle so that the captured image includes the driver 46 of the own vehicle and the plurality of audio output devices 51.
  • the vehicle device 1a not only has the function of the voice output control device 1 described in the first embodiment, but also has a DMS (Driver Monitoring System) function that monitors the consciousness state and health state of the passenger and supports driving. are doing.
  • the vehicle device 1a includes an image analysis unit 11a, a fixed determination unit 12a, a change determination unit 12b, and a parameter change unit 12c.
  • the image analysis unit 11a is included in the concept of the acquisition unit 11 in FIG.
  • the fixed determination unit 12a, the change determination unit 12b, and the parameter change unit 12c are included in the concept of the control unit 12 of FIG.
  • the image analysis unit 11a acquires the position of the face of the driver 46 and the positions of the plurality of audio output devices 51 by analyzing the image captured by the camera 53.
  • the acquired face position is used not only for controlling the plurality of voice output devices 51 described below, but also for the DMS function of the vehicle device 1a and the like.
  • FIG. 3 is a block diagram showing the configuration of the vehicle device 1a according to the second embodiment.
  • the fixing determination unit 12a determines whether or not the position fixing time is longer than a predetermined time, similarly to the control unit 12 described in the first embodiment.
  • the change determination unit 12b determines whether or not the position fixing time is equal to or less than a predetermined time. Since it is assumed that the result of the above determination of the fixed determination unit 12a and the result of the above determination of the change determination unit 12b have an exact opposite relationship, only one of the above two determinations is determined. You may. In the following, for the sake of simplicity, the fixed determination unit 12a will perform the above determination, that is, determine whether or not the position fixing time is larger than a predetermined time.
  • the predetermined control is, for example, the control of the DMS function
  • the predetermined processing load is, for example, the maximum processing load of the vehicle device 1a. This determination may be performed by the change determination unit 12b instead of the fixed determination unit 12a.
  • the change determination unit 12b determines whether or not the position of the face acquired by the image analysis unit 11a fluctuates periodically. This cycle is set to a time shorter than a predetermined time compared to the fixed position time.
  • the parameter changing unit 12c performs real-time control when it is determined that the position fixing time is longer than the predetermined time, and the position fixing time is predetermined. Intermittent control is performed when it is determined that the time is less than the specified time. At this time, the parameter changing unit 12c uses the positions of the plurality of audio output devices 51 acquired by the image analysis unit 11a for real-time control and intermittent control.
  • the parameter changing unit 12c obtains the distance between the face and each voice output device 51 based on the position of the face acquired by the image analysis unit 11a and the position of each voice output device 51.
  • the parameters of each audio output device 51 are changed based on the distance. For example, the longer the distance, the earlier the audio output timing of the audio output device 51 or the higher the volume thereof.
  • the parameter changing unit 12c determines whether or not the position fixing time is larger than the predetermined time. Real-time control is performed regardless of the judgment result.
  • the parameter changing unit 12c determines whether or not the position fixing time is larger than the predetermined time when the change of the parameter used for the real-time control is larger than the predetermined threshold value, and , Intermittent control is performed regardless of the determination result as to whether or not the sum is smaller than the predetermined processing load.
  • the parameter changing unit 12c uses the center position of the facial fluctuation for intermittent control when the change determining unit 12b determines that the position of the face fluctuates periodically. That is, the parameter changing unit 12c performs intermittent control with respect to the center position of the fluctuation of the face.
  • the center position of the fluctuation of the face corresponds to the center position of the vibration when the periodic fluctuation of the face is regarded as a simple vibration.
  • FIG. 4 is a flowchart showing the operation of the vehicle device 1a according to the second embodiment. This operation is performed, for example, for each periodic input from the camera 53 to the vehicle device 1a.
  • step S1 the image analysis unit 11a acquires the position of the driver 46's face by analyzing the image captured by the camera 53.
  • step S2 the fixed determination unit 12a determines whether or not the position of the face of the previously acquired image and the position of the face of the image acquired this time are completely the same. That is, the fixed determination unit 12a determines whether or not the position of the face is completely fixed. If it is determined that they are completely the same, the operation of FIG. 4 ends, and if it is determined that they are not completely the same, the process proceeds to step S3.
  • step S3 the fixed determination unit 12a determines whether or not the sum of loads is smaller than the predetermined processing load. If it is determined that the sum of loads is smaller than the predetermined processing load, the process proceeds to step S5, and if it is determined that the sum of loads is equal to or greater than the predetermined processing load, the process proceeds to step S4. move on.
  • step S4 the fixing determination unit 12a determines whether or not the position fixing time is longer than a predetermined time. If it is determined that the fixed position time is longer than the predetermined time, the process proceeds to step S5, and if it is determined that the fixed position time is equal to or less than the predetermined time, the process proceeds to step S7. move on.
  • step S5 the parameter changing unit 12c changes the parameters used for real-time control based on the position of the face.
  • the time when the parameter change is reflected in the plurality of audio output devices 51 is in step S9, and the parameter change is not reflected in the plurality of audio output devices 51 at the time of step S5.
  • step S6 the parameter changing unit 12c determines whether or not the change in the parameter used for real-time control is larger than a predetermined threshold value. If it is determined that the parameter change is larger than the predetermined threshold value, the process proceeds to step S7, and if it is determined that the parameter change is equal to or less than the predetermined threshold value, the process proceeds to step S9. move on.
  • step S7 the change determination unit 12b determines whether or not the position of the face fluctuates periodically. If it is determined that the position of the face fluctuates periodically, the process proceeds to step S8, and if it is determined that the position of the face does not fluctuate periodically, the operation of FIG. 4 ends.
  • step S8 the parameter changing unit 12c changes the parameters used for intermittent control based on the center position of the facial fluctuation.
  • the parameter change in step S8 is performed intermittently compared to the parameter change in step S6. Further, the time point at which the parameter change is reflected in the plurality of audio output devices 51 is step S9, and at the time of step S8, the parameter change is not reflected in the plurality of audio output devices 51. After that, the process proceeds to step S9.
  • step S9 the parameter changing unit 12c outputs the parameters to the plurality of audio output devices 51.
  • intermittent control is performed when step S9 is performed through step S8, and real-time control is performed when step S9 is performed without going through step S8. After that, the operation of FIG. 4 ends.
  • the determination result as to whether or not the position fixing time is larger than the predetermined time is larger than the predetermined time. Intermittent control is performed regardless. According to such a configuration, it is possible to stabilize the stereo reproduction and reduce the processing load of the control unit 12.
  • the stereo target position to be reproduced in stereo also sways from side to side. If these phases are accidentally reversed, that is, if the face is on the left side, the stereo target position is on the right side, and if the face is on the right side, the stereo target position is on the left side. The deviation becomes relatively large.
  • the central position of the fluctuation of the face is used for intermittent control. According to such a configuration, it is possible to reduce the above-mentioned deviation between the face position and the stereo target position.
  • the positions of the plurality of audio output devices 51 are used for real-time control and intermittent control. According to such a configuration, it is possible to reduce the deviation between the position of the face and the position of the stereo target.
  • the passenger whose face position is acquired is described as being a driver, but may be a passenger, or both a driver and a passenger. You may.
  • the passenger whose face position is acquired is both the driver and the passenger, it is preferable to use a noise canceller so that the voice for one does not become noise for the other.
  • the parameter changing unit 12c used the central position of the facial fluctuation for intermittent control when it was determined that the facial position fluctuated periodically.
  • the present invention is not limited to this, and the parameter changing unit 12c may obtain the frequency of the face position acquired by the image analysis unit 11a and use the face position having the highest frequency for intermittent control. Even with such a configuration, it is possible to reduce the deviation between the face position and the stereo target position.
  • the camera 53 is arranged in the own vehicle so that the captured image includes a plurality of audio output devices 51, and the image analysis unit 11a analyzes the image captured by the camera 53. As a result, the positions of the plurality of audio output devices 51 were acquired.
  • the present invention is not limited to this, and the image analysis unit 11a may identify the vehicle type and grade of the own vehicle based on the image of the interior 41 of the own vehicle. Then, the image analysis unit 11a follows a correspondence relationship between the vehicle type and grade previously associated with the memory (not shown) of the vehicle device 1a and the positions of the plurality of audio output devices 51, and the image analysis unit 11a has a plurality of audio output devices based on the identification result.
  • the position of 51 may be acquired. According to such a configuration, the positions of the plurality of audio output devices 51 can be acquired even if the image of the camera 53 does not include the plurality of audio output devices 51.
  • the above-mentioned acquisition unit 11 and control unit 12 are hereinafter referred to as “acquisition unit 11 and the like”.
  • the acquisition unit 11 and the like are realized by the processing circuit 81 shown in FIG. That is, it is determined that the processing circuit 81 has the acquisition unit 11 that acquires the position of the occupant's face, and the position fixing time, which is the time during which the acquired face position is fixed, is larger than a predetermined time.
  • a control unit 12 is provided which performs real-time control in such a case and performs intermittent control when it is determined that the position fixing time is equal to or less than a predetermined time.
  • Dedicated hardware may be applied to the processing circuit 81, or a processor that executes a program stored in the memory may be applied. Examples of the processor include a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), and the like.
  • the processing circuit 81 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field Programmable Gate). Array), or a combination of these.
  • Each of the functions of each part such as the acquisition unit 11 may be realized by a circuit in which the processing circuits are dispersed, or the functions of each part may be collectively realized by one processing circuit.
  • the processing circuit 81 When the processing circuit 81 is a processor, the functions of the acquisition unit 11 and the like are realized by combining with software and the like.
  • the software and the like correspond to, for example, software, firmware, or software and firmware.
  • Software and the like are described as programs and stored in memory.
  • the processor 82 applied to the processing circuit 81 realizes the functions of each part by reading and executing the program stored in the memory 83. That is, when the voice output control device 1 is executed by the processing circuit 81, the step of acquiring the position of the occupant's face and the position fixing time, which is the time during which the acquired face position is fixed, are predetermined.
  • a step of performing real-time control when it is determined that the time is longer than the predetermined time and performing intermittent control when it is determined that the position fixing time is less than or equal to the predetermined time is executed.
  • a memory 83 for storing a program to be used is provided. In other words, it can be said that this program causes the computer to execute the procedure or method of the acquisition unit 11 or the like.
  • the memory 83 is a non-volatile or non-volatile memory such as a RAM (RandomAccessMemory), a ROM (ReadOnlyMemory), a flash memory, an EPROM (ErasableProgrammableReadOnlyMemory), and an EEPROM (ElectricallyErasableProgrammableReadOnlyMemory). Volatile semiconductor memory, HDD (Hard Disk Drive), magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), its drive device, etc., or any storage medium that will be used in the future. You may.
  • each function of the acquisition unit 11 and the like is realized by either hardware or software has been described above.
  • the present invention is not limited to this, and a configuration may be configured in which a part of the acquisition unit 11 or the like is realized by dedicated hardware and another part is realized by software or the like.
  • the acquisition unit 11 realizes its function by a processing circuit 81 as dedicated hardware, an interface, a receiver, and the like, and other than that, the processing circuit 81 as a processor 82 reads a program stored in the memory 83. It is possible to realize the function by executing it.
  • the processing circuit 81 can realize each of the above-mentioned functions by hardware, software, or a combination thereof.
  • the voice output control device 1 described above includes a vehicle device such as a PND (Portable Navigation Device), a navigation device, and a DMS device, a communication terminal including a mobile terminal such as a mobile phone, a smartphone, and a tablet, a vehicle device, and the vehicle device. It can also be applied to a voice output control system constructed as a system by appropriately combining a function of an application installed on at least one of communication terminals and a server. In this case, each function or each component of the audio output control device 1 described above may be distributed and arranged in each device for constructing the system, or may be arranged in a concentrated manner in any of the devices. May be good.
  • FIG. 7 is a block diagram showing the configuration of the server 91 according to this modification.
  • the server 91 of FIG. 7 includes a communication unit 91a and a control unit 91b, and can perform wireless communication with a vehicle device 93 such as a navigation device and a DMS device of the vehicle 92.
  • a vehicle device 93 such as a navigation device and a DMS device of the vehicle 92.
  • the communication unit 91a which is the acquisition unit, receives the position of the passenger's face acquired by the vehicle device 93 by performing wireless communication with the vehicle device 93.
  • the control unit 91b has the same function as the control unit 12 of FIG. 1 when a processor (not shown) of the server 91 or the like executes a program stored in a memory (not shown) of the server 91. That is, the control unit 91b performs real-time control when it is determined that the position fixing time, which is the time when the received face position is fixed, is longer than the predetermined time, and the position fixing time is predetermined. A control signal for performing intermittent control is generated when it is determined that the time is less than or equal to the specified time. Then, the communication unit 91a transmits the control signal generated by the control unit 91b to the vehicle device 93. According to the server 91 configured in this way, the same effect as that of the voice output control device 1 described in the first embodiment can be obtained.
  • FIG. 8 is a block diagram showing the configuration of the communication terminal 96 according to this modification.
  • the communication terminal 96 of FIG. 8 includes a communication unit 96a similar to the communication unit 91a and a control unit 96b similar to the control unit 91b, and can perform wireless communication with the vehicle device 98 of the vehicle 97. ing.
  • a mobile terminal such as a mobile phone, a smartphone, or a tablet carried by the driver of the vehicle 97 is applied to the communication terminal 96, for example.
  • the communication terminal 96 configured in this way, the same effect as that of the voice output control device 1 described in the first embodiment can be obtained.
  • each embodiment and each modification can be freely combined, and each embodiment and each modification can be appropriately modified or omitted.
  • 1 voice output control device 11 acquisition unit, 12 control unit, 41 indoor, 46 driver, 51 voice output device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

La présente invention concerne une technique permettant de stabiliser une reproduction stéréo. Un dispositif de commande de la sortie audio selon l'invention est muni d'une unité d'acquisition et d'une unité de commande. L'unité d'acquisition acquiert la position du visage d'un occupant. L'unité de commande effectue une commande en temps réel lorsqu'il est déterminé qu'un temps fixe de position, qui est un temps pour lequel la position de visage acquise est fixée, est supérieur à un temps prédéterminé, et l'unité de commande effectue une commande intermittente dans laquelle une pluralité de dispositifs de sortie audio sont commandés par intermittence, au lieu d'une commande en temps réel, sur la base de la position de visage acquise par l'unité d'acquisition lorsqu'il est déterminé que le temps fixe de position est inférieur ou égal au temps prédéterminé.
PCT/JP2019/015251 2019-04-08 2019-04-08 Dispositif de commande de sortie audio et procédé de commande de sortie audio WO2020208667A1 (fr)

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PCT/JP2019/015251 WO2020208667A1 (fr) 2019-04-08 2019-04-08 Dispositif de commande de sortie audio et procédé de commande de sortie audio
JP2021513033A JP6887588B2 (ja) 2019-04-08 2019-04-08 音声出力制御装置及び音声出力制御方法

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PCT/JP2019/015251 WO2020208667A1 (fr) 2019-04-08 2019-04-08 Dispositif de commande de sortie audio et procédé de commande de sortie audio

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006193057A (ja) * 2005-01-14 2006-07-27 Nagano Kogaku Kenkyusho:Kk 車両監視ユニットおよびルームミラー装置
JP2008236397A (ja) * 2007-03-20 2008-10-02 Fujifilm Corp 音響調整システム
JP2016199124A (ja) * 2015-04-09 2016-12-01 之彦 須崎 音場制御装置及び適用方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190251948A1 (en) * 2016-04-05 2019-08-15 Sony Corporation Signal processing device, signal processing method, and program

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006193057A (ja) * 2005-01-14 2006-07-27 Nagano Kogaku Kenkyusho:Kk 車両監視ユニットおよびルームミラー装置
JP2008236397A (ja) * 2007-03-20 2008-10-02 Fujifilm Corp 音響調整システム
JP2016199124A (ja) * 2015-04-09 2016-12-01 之彦 須崎 音場制御装置及び適用方法

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