JPWO2016151720A1 - Audio correction device - Google Patents

Abstract

Provided is an audio correction device capable of correcting an output audio suitable for an environment in which an acoustic device is installed. The smartphone (1) is configured separately from the vehicle-mounted device (2). The receiver (11) acquires the characteristic information of the microphone (15) of the smartphone (1) from the server (2), and the G sensor ( 18) Information on the orientation of the smartphone (1) is acquired. Next, the calculation unit (13) generates white noise sound in the white noise generation unit (14), outputs the white noise sound to the in-vehicle device (2), and records the white noise sound using the microphone (15). Recorded in the part (16) as the measurement result. And a correction information is produced | generated based on the characteristic information of a microphone (15), the information regarding the direction of a smart phone (1), and a measurement result in a calculating part (13).

Description

  The present invention relates to a sound correction apparatus that corrects output sound of an acoustic device or the like.

  For example, in many audio devices such as car audio, the sound quality can be adjusted according to the installation environment of the audio device.

  In recent years, in car audio, a portable music player or the like is connected to play music stored in the portable music player. At this time, it has been proposed that the car audio obtains the sound quality setting set in the portable music player or the like and is reproduced with a sound quality similar to that reproduced by the portable music player (see, for example, Patent Document 1). .

  In Patent Document 1, the vehicle acoustic device 300 acquires the sound setting information of the external sound source device 100, and the sound setting correction unit 302 performs conversion based on the output characteristics unique to the external sound source device 100, and further, It is described that music or the like is reproduced by performing correction in consideration of the output characteristics of the vehicle acoustic device 300 itself.

Japanese Patent No. 5114922

  However, in the invention described in Patent Document 1, the vehicle audio device 300 to be applied is connected in the case where the vehicle installed such as a car audio marketed at a store or a device to which a speaker to be connected is not specified in advance. It is possible to take into account the sound setting information of a portable music player or the like, but the characteristics of the connected speaker, the echo characteristics in the vehicle, and the characteristics such as attenuation due to the seat and interior materials are not known. Therefore, even if the output characteristics of the vehicular acoustic device 300 itself are known, correction in accordance with the in-vehicle environment may be insufficient.

  In addition, a microphone, arithmetic unit, etc. are installed in car audio, etc., the sound from the speaker is recorded with the microphone, the parameter that optimizes the characteristics is calculated, and the parameter is reflected when the sound is played back. Can also be played. In this case, however, a microphone and an advanced arithmetic device are required, which is expensive.

  In view of the above-described problems, an object of the present invention is to provide an audio correction device that can correct an output audio suitable for an environment in which an acoustic device is installed.

  In order to solve the above-described problem, the invention according to claim 1 is an audio correction device that includes a microphone and generates correction information for correcting an output sound of an audio device, and causes the audio device to output a measurement sound. A measurement unit that measures the measurement sound via the microphone, and a correction information generation unit that generates the correction information based on a measurement result measured by the measurement unit, which is separate from the acoustic device. It is comprised, The voice correction device characterized by the above-mentioned.

  The invention according to claim 9 is an audio correction method for an audio correction apparatus that is configured separately from an audio device, includes a microphone, and generates correction information for correcting an output sound of the audio device. Based on the measurement step of outputting the measurement sound to the acoustic device and measuring the measurement sound through the microphone, the characteristics of the microphone acquired in the characteristic information acquisition step, and the measurement result measured in the measurement step And a correction information generation step of generating the correction information.

  According to a tenth aspect of the present invention, there is provided a voice correction program that causes a computer to execute the voice correction method according to the ninth aspect.

  The invention described in claim 11 is a computer-readable recording medium in which the sound correction program according to claim 10 is stored.

It is the block diagram which showed the connection structure of the smart phone concerning one Example of this invention, vehicle equipment, and a server. It is a functional block diagram of the smart phone shown by FIG. It is a function block diagram of the vehicle equipment shown by FIG. It is a function block diagram of the server shown by FIG. It is a flowchart of the sound quality correction | amendment operation | movement in the smart phone shown by FIG. 6 is a flowchart of a microphone characteristic correction operation shown in FIG. 6 is a flowchart of a measurement direction determination operation shown in FIG. 5. 6 is a flowchart of the measurement operation shown in FIG. 6 is a flowchart of a correction information generation operation shown in FIG. It is an example of a screen display of direction designation. It is an example of a screen display when it becomes a correct orientation. It is a graph showing an example of measurement results 13 is a graph showing an example of a result of performing microphone characteristic correction on FIG. 14 is a graph showing an example of a result obtained by performing correction on FIG.

  Hereinafter, a display device according to an embodiment of the present invention will be described. The sound correction apparatus according to an embodiment of the present invention is configured separately from the acoustic device, and the measurement unit outputs the measurement sound to the acoustic device and measures the measurement sound through the microphone. Then, correction information is generated based on the characteristics of the microphone acquired by the characteristic information acquisition unit and the measurement result measured by the measurement unit in the correction information generation unit. In this way, correction information can be generated using a microphone that is separate from the audio device, and the output sound is corrected to be suitable for the environment in which the audio device such as the car audio is installed. be able to. Moreover, since it is a separate body from the audio equipment, correction in a plurality of environments can be easily performed.

  Moreover, if the microphone characteristics can be acquired, the microphone itself may not have high performance. For example, the output sound of an audio device such as a car audio can be easily corrected using a device such as a smartphone provided with a microphone in advance. be able to.

  Further, a characteristic information acquisition unit that acquires the characteristic information of the microphone is further provided, and the correction information generation unit generates correction information based on the characteristics of the microphone acquired by the characteristic information acquisition unit and the measurement result measured by the measurement unit. Also good. In this way, correction information can be generated in consideration of the characteristics of the microphone that measures the measurement sound, and it is suitable for an environment where an audio device such as a car audio is installed without depending on the characteristics of the microphone. The output sound can be corrected.

  Further, it further comprises a direction information acquisition unit that acquires information about the direction of the microphone, and the measurement unit is based on the information about the direction acquired by the direction information acquisition unit and the direction of the microphone when measuring the characteristic information of the microphone. The measurement sound may be output to an acoustic device and the measurement sound may be measured via a microphone. In this way, since the direction of the microphone can be taken into consideration, correction independent of the characteristics of the microphone can be performed.

  The correction information generation unit may generate microphone correction information obtained by correcting the measurement result of the measurement unit based on the microphone characteristic information, and generate correction information based on the microphone correction information. By doing so, it is possible to generate microphone characteristic information that does not depend on the characteristics of the microphone from the measurement result, and correct the output sound to be suitable for an environment in which an audio device such as a car audio is installed based on the information. .

  The measurement unit may record the measurement sound, and the correction information generation unit may generate the correction information based on the measurement sound recorded by the measurement unit. In this way, since the measurement sound can be recorded, correction information can be generated even when the processing capability is low and real-time processing is difficult.

  Moreover, you may further provide the output part which outputs correction | amendment information to an audio equipment. By doing so, the generated correction information can be automatically corrected by the audio equipment.

  Further, the image processing apparatus may further include a correction range information acquisition unit that acquires information regarding the correction range in the audio device, and the correction information generation unit may generate correction information based on the information regarding the correction range acquired by the correction range information acquisition unit. . In this way, correction information can be generated based on information related to the correction range of the acoustic device, such as the number of bands, center frequency, Q value, gain, etc. of the correction means such as an equalizer that the acoustic device has.

  Moreover, the audio equipment may be provided in the moving body. By doing in this way, it can correct | amend according to the acoustic characteristic of the mounted vehicle about acoustic apparatuses, such as a car audio mounted in vehicles, such as a motor vehicle.

  In addition, the audio correction method according to an embodiment of the present invention is an audio correction apparatus configured separately from an audio device, in which the measurement process causes the audio device to output measurement sound and measures the measurement sound via a microphone. To do. Then, the correction information generation step generates correction information based on the characteristics of the microphone acquired in the characteristic information acquisition step and the measurement result measured in the measurement step. In this way, correction information can be generated using a microphone that is separate from the audio device, and the output sound is corrected to be suitable for the environment in which the audio device such as the car audio is installed. be able to. Moreover, since it is a separate body from the audio equipment, correction in a plurality of environments can be easily performed.

  Moreover, it is good also as an audio | voice correction program which performs the audio | voice correction method mentioned above by computer. By doing so, it is possible to generate correction information using a microphone that is a separate device from the acoustic device using a computer, and it is suitable for an environment where an acoustic device such as a car audio is installed. The output sound can be corrected. Moreover, since it is a separate body from the audio equipment, correction in a plurality of environments can be easily performed.

  Further, the above-described audio correction program may be stored in a computer-readable recording medium. In this way, the program can be distributed as a single unit in addition to being incorporated in the device, and version upgrades can be easily performed.

  An audio correction apparatus according to an embodiment of the present invention will be described with reference to FIGS. First, FIG. 1 shows a connection configuration of a smartphone 1 as an audio correction device according to the present embodiment, an in-vehicle device 2 as an acoustic device, and a server 4.

  The smartphone 1 can communicate with the in-vehicle device 2 wirelessly. In FIG. 1, wireless communication is possible, but communication may be possible via wired communication such as USB (Universal Serial Bus). That is, the smartphone 1 is configured separately from the in-vehicle device 2. The in-vehicle device 2 is a device that is installed in a vehicle interior of a vehicle and that reproduces sound, such as a car audio or a car navigation system. The in-vehicle device 2 is connected to speakers 3L and 3R. Note that the number of speakers is not limited to two and may be three or more.

  The smartphone 1 can communicate with the server 4 wirelessly. The server 4 can communicate with the smartphone 1 via, for example, the Internet.

  As illustrated in FIG. 2, the smartphone 1 includes a reception unit 11, a transmission unit 12, a calculation unit 13, a white noise generation unit 14, a microphone 15, a recording unit 16, a display unit 17, and a G sensor 18. And an operation unit 19.

  The receiving unit 11 receives from the vehicle-mounted device 2 acoustic characteristic correction possible range information (information relating to the correction range in the acoustic device) and the like which will be described later. The received acoustic characteristic correction possible range information is output to the calculation unit 13. The receiving unit 11 receives microphone characteristic information of the smartphone 1 from the server 4. In other words, the reception unit 11 functions as a correction range information acquisition unit that acquires information about the correction range in the acoustic device and a characteristic information acquisition unit that acquires characteristic information of the microphone 15.

  The transmission unit 12 transmits acoustic characteristic correction amount information (described later) input from the calculation unit 13 and white noise sound information input from the white noise generation unit 14 to the in-vehicle device 2. The transmission unit 12 transmits model information of the smartphone 1 to the server 4.

  That is, the reception unit 11 and the transmission unit 12 are configured to communicate with the in-vehicle device 2 (Bluetooth (registered trademark), USB, etc.) and communicate with the server 4 (LTE (Long Term Evolution) or wireless LAN (Local Area Network). ) Etc.).

  The calculation unit 13 estimates the orientation of the smartphone 1 based on the output of the G sensor 18. Further, the calculation unit 13 causes the white noise generation unit 14 to generate white noise sound, and causes the recording unit 16 to record the white noise sound reproduced by the in-vehicle device 2 via the microphone 15. In addition, the arithmetic unit 13 corrects the characteristics of the microphone 15 based on the microphone characteristic information received from the server 4 for the white noise sound recorded in the recording unit 16. And the calculating part 13 produces | generates the acoustic characteristic correction amount information of the vehicle equipment 2 based on the result of the correction concerning the characteristic of the microphone 15.

  The white noise generation unit 14 generates white noise sound as a measurement sound. In this embodiment, white noise sound is used as the measurement sound. However, the sound is suitable for measuring the frequency characteristics of the vehicle-mounted device 2 such as an impulse response impulse, the speakers 3L and 3R, and the vehicle interior. If it is.

  The microphone 15 collects white noise sound reproduced by the in-vehicle device 2. Note that the microphone 15 is not a dedicated one but may be used for a telephone call or the like.

  The recording unit 16 records white noise sound collected by the microphone 15. The recording unit records white noise sound in a storage medium such as a memory (not shown).

  The display unit 17 is composed of, for example, a liquid crystal display, and displays a result of correction related to the characteristics of the microphone 15 calculated by the calculation unit 13, acoustic characteristic correction amount information generated thereafter, and the like. Of course, the display unit 17 may display other functions (call, mail, etc.) of the smartphone 1.

  The G sensor 18 is a so-called acceleration sensor. For example, if it is a three-axis acceleration sensor, it can measure accelerations in three directions of the XYZ axes. The G sensor 18 outputs the measured acceleration to the calculation unit 13. That is, since gravity is applied to the ground direction, the acceleration output from the G sensor 18 becomes information regarding the direction of the microphone 15, and the G sensor 18 functions as a direction information acquisition unit.

  The operation unit 19 includes a push button, a touch panel, and the like, and information related to an operation input by a user or the like is output to the calculation unit 13.

  As shown in FIG. 3, the in-vehicle device 2 includes a transmission unit 21, a reception unit 22, a correction unit 23, an optical disk drive 24, a reproduction unit 25, and an amplifier 26.

  The transmission unit 21 transmits the acoustic characteristic correction possible range information and the like input from the correction unit 23 to the smartphone 1.

  The receiving unit 22 receives acoustic characteristic correction amount information, white noise audio information, and the like from the smartphone 1. The received acoustic characteristic correction amount information is output to the correction unit 23, and the white noise audio information is output to the reproduction unit 25.

  Based on the acoustic characteristic correction amount information input from the receiving unit 22, the correcting unit 23 sets a gain or the like for each of a plurality of frequency bands and corrects the audio signal reproduced by the reproducing unit 25.

  The optical disc drive 24 is a device that reads audio information and the like from an optical disc on which audio information such as music such as a CD (Compact Disc), a DVD (Digital Versatile Disc), and a Blu-ray disc is recorded. In this embodiment, an optical disk is used as a recording medium on which audio information such as music is recorded. However, the present invention is not limited to this, and a hard disk, a semiconductor memory, or the like may be used. Moreover, the sound of radio broadcasting or television broadcasting may be used. Or the audio | voice information input by communication etc. from the outside, such as the music stored in the smart phone 1, may be sufficient.

  The reproduction unit 25 reproduces the audio information read by the optical disc drive 24 and outputs it to the amplifier 26.

  The amplifier 26 amplifies the audio signal reproduced by the reproducing unit 25 by a predetermined amount and outputs it to the speakers 3L and 3R.

  As illustrated in FIG. 4, the server 4 includes a transmission unit 41, a reception unit 42, a calculation unit 43, and a microphone characteristic storage unit 44.

  The transmission unit 41 transmits the microphone characteristic information and the like input from the calculation unit 43 to the smartphone 1.

  The receiving unit 42 receives model information and the like from the smartphone 1. The receiving unit 42 outputs the received model information and the like to the calculation unit 43.

  Based on the model information received by the reception unit 42, the calculation unit 43 reads out the microphone characteristic corresponding to the model from the microphone characteristic storage unit 44 and transmits it to the smartphone 1 via the transmission unit 41.

  The microphone characteristic storage unit 44 is a recording medium in which microphone characteristics for each model of the plurality of smartphones 1 are stored. The microphone characteristic is a frequency characteristic corresponding to the direction of the microphone (direction of the smartphone 1 itself) in the model. The smartphone 1 has different recording characteristics due to differences in microphone position and performance depending on the model. Therefore, the frequency characteristics of the microphone 15 of the smartphone 1 are obtained by measuring the speaker and the smartphone 1 whose characteristics are known in advance in an environment where ideal recording is possible such as an anechoic room. This microphone characteristic may be measured for each direction of the plurality of smartphones 1 (that is, the direction of the microphone) and stored in the microphone characteristic storage unit 44, or only in one specific direction.

  Note that the model stored in the microphone characteristic storage unit 44 is not limited to the smartphone 1, and a device such as a mobile phone that includes a microphone and can function as an audio correction device may be included.

  Next, the sound quality correction operation in the smartphone 1 having the above-described configuration will be described with reference to the flowcharts of FIGS. These flowcharts are executed by the calculation unit 13 of the smartphone 1 unless otherwise specified.

  First, in step S11, the application is activated and the process proceeds to step S12. Here, the application is a sound correction program for executing the sound quality correction method according to the present embodiment. This application is installed in the smartphone 1 in advance or by downloading.

  Next, in step S12 as the characteristic information acquisition step, the microphone characteristic of the smartphone 1 is acquired from the server 4, and the process proceeds to step S13. In this step, as shown in FIG. 6, first, the smartphone 1 transmits preset model information to the server 4 via the transmission unit 12 (step S21). In the server 4, the calculation unit 43 selects the microphone characteristic of the model stored in the microphone characteristic storage unit 44 based on the model information received by the reception unit 42, and the smartphone via the transmission unit 41 as microphone characteristic information. 1 to send. The smartphone 1 acquires the microphone characteristic information by receiving the microphone characteristic information with the receiving unit 11 (step S22). Note that once this step S12 is executed, it may not be executed after the next time, for example, when a correction operation is performed in another vehicle.

  Next, in step S13, the orientation of the smartphone 1 is determined for a measurement operation described later. The orientation of the smartphone 1 is determined by the flowchart shown in FIG.

  In step S31 of the flowchart of FIG. 7, the direction of the smartphone 1 is designated to the user of the smartphone 1 or the like, and the process proceeds to step S32. For example, the orientation is displayed on a display unit (not shown) of the in-vehicle device 2 or the display unit 17 of the smartphone 1 as shown in FIG. In the example of FIG. 10, the lower side is determined based on the screen display of the smartphone 1. The designation of this orientation designates the same orientation as the orientation of the smartphone 1 when measuring the microphone characteristic information. In the present embodiment, the direction of the smartphone 1 is specified, but this is substantially equivalent to specifying the direction of the microphone 15. In addition, for example, a screen showing the ears of the user who actually listens (such as matching the position of the headrest of the vehicle seat including the driver's seat and the passenger seat) is displayed on the in-vehicle device 2 and the display portion of the smartphone 1. 17 may be displayed.

  Next, in step S32, the orientation of the smartphone 1 is estimated, and the process proceeds to step S33. The direction is estimated by a well-known method based on the output (direction information) of the G sensor 18 mounted on the smartphone 1.

  Next, in step S33, it is determined whether or not the actual orientation of the smartphone 1 matches the designated orientation. If they match (YES), the process proceeds to step S34, and if they do not match (NO). Repeat this step until they match.

  Next, in step S34, for example, the correct orientation is displayed on the screen as shown in FIG. 11, and the flow returns to the flowchart of FIG.

  Returning to the flowchart of FIG. 5, measurement is performed in step S14 as a measurement process. The measurement is to measure a frequency characteristic at the time of reproduction by the in-vehicle device 2 in a cabin where the in-vehicle device 2 is installed. The measurement operation is performed according to the flowchart shown in FIG. That is, the measurement process is performed based on the direction of the microphone (the direction of the smartphone 1) and the direction of the microphone at the time of measuring the characteristic information of the microphone (specified direction).

  In step S41 of the flowchart of FIG. 8, a measurement start button or the like is displayed on the display unit 17 of the smartphone 1, and measurement is started by the user or the like operating the button, and the process proceeds to step S42. Then, the recording of the sound collected by the microphone 15 is started by the button operation of the user or the like. The measurement start button may be displayed not on the smartphone 1 but on the in-vehicle device 2 side, and information indicating the measurement start may be received from the in-vehicle device 2.

  Next, in step S42, the white noise generating unit 14 generates white noise sound and transmits the white noise sound information through the transmitting unit 12 as white noise sound information. In the in-vehicle device 2, the white noise sound information received by the receiving unit 22 is directly reproduced by the reproduction unit 25, and white noise sound is emitted from the speakers 3 </ b> L and 3 </ b> R. At this time, the sound quality correction operation by the correction unit 23 is not performed on the in-vehicle device 2 side. White noise sound radiated from the speakers 3L and 3R is collected from the microphone 15 of the smartphone 1 and recorded in the recording unit 16.

  Next, in step S43, after the white noise sound is reproduced by the in-vehicle device 2 for a predetermined time, the measurement (recording) is terminated, and the process returns to the flowchart of FIG. That is, the white noise generation unit 14 stops the generation of white noise sound, and the recording by the recording unit 16 is stopped. The white noise sound recorded by the recording unit 16 becomes the measurement result. As is apparent from the description of the flowchart of FIG. 8, the calculation unit 13 determines that the direction information acquired by the G sensor 18 (orientation information acquisition unit) matches the direction of the microphone at the time of measuring the characteristic information of the microphone 15. The measurement sound is output to the in-vehicle device 2 (acoustic device), and the measurement sound is measured using the microphone 15.

  In the present embodiment, the smartphone 1 includes the white noise generation unit 14 and outputs white noise sound to the in-vehicle device 2, but the in-vehicle device 2 generates measurement sound such as white noise sound. The smartphone 1 may be configured to transmit a measurement sound output instruction.

  Returning to the flowchart of FIG. 5, in step S15, the measurement result measured in step S14 is corrected based on the microphone characteristic information acquired in step S12, and the process proceeds to step S16. The measurement result corrected in this step becomes microphone correction information. In this step, the measurement performed in step S14 is executed in order to eliminate the influence of the characteristics of the microphone 15. For example, the measurement result measured in step S14 is subjected to fast Fourier transform to calculate a frequency characteristic, and correction is performed so that the characteristic of the microphone 15 becomes flat with respect to the frequency characteristic.

  Next, in step S16 as a correction information generation step, acoustic characteristic correction amount information for the in-vehicle device 2 is generated, and the process proceeds to step S17. The acoustic characteristic correction amount information generation operation is performed according to the flowchart shown in FIG.

  In step S51 of the flowchart of FIG. 9, acoustic characteristic correction possible range information (information regarding the correction range) is acquired from the correction unit 23 of the in-vehicle device 2 via the transmission unit 21 and the reception unit 11, and the process proceeds to step S52. The acoustic characteristic correction possible information indicates information regarding the correction amount of the correction unit 23 included in the in-vehicle device 2. Specifically, it is information related to a sound quality adjustment function such as an equalizer, such as information on the number of bands, center frequency, Q value, upper and lower limits of gain, and the like.

  Next, in step S52, based on the acoustic characteristic correction possible range information acquired in step S51 and the measurement result (microphone correction information) after the microphone characteristic is corrected in step S15, the acoustic characteristic for the in-vehicle device 2 is obtained. The correction amount information is generated and the process returns to the flowchart of FIG. That is, the calculation unit 13 functions as a correction information generation unit that generates correction information for correcting the output sound of the in-vehicle device 2 based on the characteristics of the microphone 15 and the measurement results.

  Returning to the flowchart of FIG. 5, in step S17, the acoustic characteristic correction amount information is output and the process ends. In this step, the acoustic characteristic correction amount information is transmitted to the in-vehicle device 2 via the transmission unit 12. That is, the transmission unit 12 functions as an output unit that outputs correction information to the in-vehicle device 2 (acoustic device). In the in-vehicle device 2, the correction unit 23 performs a correction operation based on the acoustic characteristic correction amount information received by the reception unit 22. Moreover, acoustic characteristic correction amount information may be displayed on the display part 17 of the smart phone 1, and a user etc. may adjust the vehicle equipment 2 manually.

  Here, a specific example of the measurement operation, the microphone characteristic correction operation, and the correction information generation operation described above will be described.

  FIG. 12 shows an example of the frequency characteristic as it is measured (recorded) in step S14. In FIG. 12, the microphone characteristic of 200 Hz or less is difficult to pick up sound. In other words, the bass has been recorded smaller than the actual sound. Therefore, correct correction cannot be performed as it is.

  FIG. 13 is an example of the result of correcting the microphone characteristics in step S15. This state is the actual sound condition in the passenger compartment. However, in FIG. 13, it can be seen that the vehicle-mounted device 2 (speakers 3L and 3R) and the in-vehicle environment have a characteristic in which the vicinity sounds 6 kHz.

  Therefore, in step S16, the acoustic characteristic correction amount information is generated so as to approach the flat frequency characteristic based on the acoustic characteristic correction possible range information of the in-vehicle device 2 and is transmitted to the in-vehicle device 2, and the correction unit 23 of the in-vehicle device 2 Based on the received acoustic characteristic correction amount information, correction is performed as shown in FIG. In the case of FIG. 14, correction was performed so that −10 dB centered on 6 kHz, −5 dB centered on 10 kHz, and +2 dB centered on 2 kHz. By doing so, it is possible to improve the audibility by making the characteristics close to flat.

  According to the present embodiment, the smartphone 1 is configured separately from the in-vehicle device 2, the characteristic information of the microphone 15 of the smartphone 1 is acquired from the server 4 by the receiving unit 11, and the direction of the smartphone 1 is detected by the G sensor 18. Get information about. Next, the calculation unit 13 causes the white noise generation unit 14 to generate white noise sound, causes the vehicle-mounted device 2 to output the white noise sound, and uses the microphone 15 to record the white noise sound to the recording unit 16 and the measurement result. And Then, the calculation unit 13 generates correction information based on the characteristic information of the microphone 15 and the measurement result. In this way, correction information can be generated in consideration of the characteristics of the microphone of the smartphone 1 and is suitable for an environment in which the vehicle-mounted device 2 such as a car audio is installed without depending on the characteristics of the microphone 15. The output sound can be corrected. Moreover, since it is a separate body from the vehicle-mounted device 2, it can be easily corrected in a plurality of environments such as other vehicles and other acoustic devices.

  Further, since the microphone characteristic correction and the generation of correction information are performed after the recording unit 16 has recorded the white noise sound, the correction information can be generated even when the processing capability is low and real-time processing is difficult.

  Further, if the characteristics and orientation of the microphone 15 can be acquired, the microphone itself may not have high performance. Therefore, the output of an audio device such as a car audio can be easily performed using a device in which the microphone 15 is provided in advance, such as the smartphone 1. Sound can be corrected.

  In addition, when the information regarding the orientation of the smartphone 1 acquired by the G sensor 18 matches the orientation of the microphone 15 at the time of measuring the characteristic information of the microphone 15, the calculation unit 43 causes the in-vehicle device 2 to output white noise sound. Recording from the microphone 15. By doing in this way, since the direction of the microphone 15 can be taken into consideration, correction independent of the characteristics of the microphone 15 can be performed.

  Moreover, the calculating part 13 produces | generates the microphone correction information which correct | amended the measurement result based on the characteristic information of the microphone 15, and the information regarding the direction of the smart phone 1, and has produced | generated correction information based on this microphone correction information. By doing in this way, the microphone characteristic information which does not depend on the characteristic of the microphone 15 can be produced | generated from a measurement result, and it can correct | amend to the output audio | voice suitable for the environment where the vehicle equipment 2 was installed based on the information.

  Moreover, the transmission part 12 which transmits correction information to the vehicle equipment 2 is provided. By doing in this way, the correction | amendment information produced | generated can be corrected by the structure of only the vehicle equipment 2 after that the vehicle equipment 2 utilizes.

  In addition, the reception unit 11 acquires the acoustic characteristic correction possible range information of the in-vehicle device 2, and the calculation unit 13 generates correction information based on the acoustic characteristic correction possible range information acquired by the reception unit 11. By doing in this way, correction information can be generated based on the acoustic characteristic correction possible range information of the vehicle-mounted device 2 such as the number of bands of the equalizer, the center frequency, the Q value, and the gain. Accordingly, it is possible to generate correction information optimal for a plurality of types of vehicle-mounted devices using only the smartphone 1.

  Further, since the microphone characteristic information for each model is stored in the server 4, it is possible to easily cope with a new model, and it is possible to easily update the microphone characteristic information.

  Moreover, since the vehicle equipment 2 is installed in vehicles, such as a motor vehicle, it can correct | amend according to the acoustic characteristic of the installed vehicles.

  In the above-described embodiment, the vehicle-mounted device 2 has been described as the acoustic device installed in the vehicle. However, as long as it is a moving body, an acoustic device installed in a railway vehicle, a ship, an aircraft, or the like may be used. Further, it may be an acoustic device such as a home audio device installed indoors.

  In the embodiment described above, the server 4 is provided. However, the smartphone 1 may store characteristic information of the microphone 15.

  Further, the present invention is not limited to the above embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the configuration of the sound correction apparatus of the present invention is provided.

1 Smartphone (voice correction device)
2 Onboard equipment (acoustic equipment)
11 Receiving unit (characteristic information acquiring unit, correction range information acquiring unit)
12 Transmitter (output unit)
13 Calculation unit (correction information generation unit)
14 White noise generator (measurement unit)
15 Microphone 16 Recording part (measurement part)
18 G sensor (direction information acquisition unit)
S12 Microphone characteristics acquisition (characteristic information acquisition process)
S13 Determination of measurement orientation (direction information acquisition process)
S14 measurement (measurement process)
S15 Microphone characteristic correction (correction information generation step)
S16 Correction information generation (correction information generation step)

In order to solve the above-described problem, the invention according to claim 1 is directed to output a measurement sound to a microphone, a characteristic information acquisition unit that acquires characteristic information of the microphone, and an external audio device, via the microphone. Based on a measurement unit that measures the measurement sound, a presentation unit that presents instruction information that indicates the position and orientation of the microphone at the time of measurement, a characteristic of the microphone, and a measurement result measured by the measurement unit A correction information generation unit that generates correction information for correcting the output sound of the acoustic device, and the presentation unit presents the instruction information before the measurement unit starts the measurement. This is a featured sound correction apparatus.

The invention described in claim 10 is an audio correction method executed by an audio correction apparatus that includes a microphone and corrects an output sound of an external audio device, and acquires characteristic information for acquiring characteristic information of the microphone. A measurement step of outputting measurement sound to the acoustic device and measuring the measurement sound via the microphone, and a presentation step of presenting instruction information indicating the position and orientation of the microphone at the time of measurement to the user And a correction information generation step of generating correction information for correcting the output sound of the acoustic device based on the characteristics of the microphone and the measurement result measured in the measurement step, and the presentation step includes the measurement The voice correction method is characterized by presenting the instruction information before starting the measurement according to a process .

The invention described in Claim 11, a voice correction process of claim 10, a voice correction program for causing a computer-implemented.

A twelfth aspect of the present invention is a computer-readable recording medium storing the voice correction program according to the eleventh aspect.

Claims (11)

An audio correction apparatus that includes a microphone and generates correction information for correcting an output sound of an acoustic device,
A measurement unit that outputs measurement sound to the acoustic device and measures the measurement sound via the microphone; and
A correction information generation unit that generates the correction information based on a measurement result measured by the measurement unit;
With
It is configured separately from the acoustic device,
An audio correction apparatus characterized by that. A characteristic information acquisition unit for acquiring characteristic information of the microphone;
The correction information generation unit generates the correction information based on the characteristics of the microphone acquired by the characteristic information acquisition unit and the measurement result measured by the measurement unit.
The sound correction apparatus according to claim 1. A direction information acquisition unit that acquires information about the direction of the microphone;
The measurement unit causes the acoustic device to output a measurement sound based on the information on the direction acquired by the direction information acquisition unit and the direction of the microphone at the time of measuring the characteristic information of the microphone, and The sound correction apparatus according to claim 2, wherein the measurement sound is measured via the sound correction device.   The correction information generation unit generates microphone correction information obtained by correcting a measurement result of the measurement unit based on characteristic information of the microphone, and generates the correction information based on the microphone correction information. Item 4. The sound correction device according to Item 3. The measurement unit records the measurement sound,
The correction information generation unit generates the correction information based on the measurement sound recorded by the measurement unit.
The sound correction device according to claim 1, wherein the sound correction device is a sound correction device.   The audio correction apparatus according to claim 1, further comprising an output unit that outputs the correction information to the acoustic device. A correction range information acquisition unit for acquiring information on the correction range in the acoustic device;
The correction information generation unit generates the correction information based on information related to the correction range acquired by the correction range information acquisition unit.
The sound correction device according to claim 1, wherein the sound correction device is a sound correction device.   The sound correction apparatus according to claim 1, wherein the acoustic device is provided on a moving body. An audio correction method for an audio correction apparatus that is configured separately from an audio device and includes a microphone, and generates correction information for correcting an output sound of the audio device,
A measurement step of outputting a measurement sound to the acoustic device and measuring the measurement sound via the microphone;
A correction information generation step for generating the correction information based on the characteristics of the microphone acquired in the characteristic information acquisition step and the measurement result measured in the measurement step;
An audio correction method comprising:   A sound correction program that causes a computer to execute the sound correction method according to claim 9.   A computer-readable recording medium storing the audio correction program according to claim 10.

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