JP2016171405A - Hearing position setting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hearing position setting device capable of increasing the degree of freedom in setting multiple hearing positions and also improving setting accuracy.SOLUTION: An on-vehicle device 1 includes: multiple speakers 22FR, FL arranged at predetermined positions; multiple portable terminal devices 90 arranged at multiple positions that are mutually separated by assuming the multiple hearing positions of users; and a control section 50 for identifying the positions of the multiple portable terminal devices 90 on the basis of the first time till the first measurement sounds to be output from the respective speakers 22FR, FL reach respective incorporated microphones of the multiple portable terminal devices 90 and the second time till the second measurement sound to be output from the incorporated speaker of the one portable terminal device 90 reaches the incorporated microphone of the other portable terminal device 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a listening position setting device that sets listening positions of a plurality of users in a passenger compartment or the like.

  Conventionally, using a microphone unit fixed to the headrest part of the driver's seat in the passenger compartment and a microphone part of a mobile phone placed in another seat (auxiliary seat or rear seat), the sound at each location A vehicle interior sound field adjustment system that sets a field is known (see, for example, Patent Document 1).

Japanese Patent No. 4407571

  By the way, in the vehicle interior sound field adjustment system disclosed in Patent Document 1, the sound field setting is performed by specifying a plurality of listening positions using a microphone part whose position is fixed and a microphone part of the mobile phone, There is a problem that the degree of freedom in setting the listening position is small and the accuracy of setting the listening position is lowered by using the microphone portion of the mobile phone. For example, if the distance between mobile phones can be measured directly compared to the case of using a single microphone unit, it is considered that the accuracy can be further improved by using the measurement result.

  The present invention was created in view of the above points, and an object of the present invention is to provide a listening position setting device capable of increasing the degree of freedom of setting a plurality of listening positions and improving the setting accuracy. There is to do.

  In order to solve the above-described problem, the listening position setting device of the present invention is arranged at a plurality of positions separated from each other assuming a plurality of speakers installed at a predetermined position and a plurality of listening positions of the user. A first time until the first measurement sound output from each of the plurality of mobile terminal devices and the plurality of speakers reaches each of the built-in microphones of the plurality of mobile terminal devices; Portable terminal position specifying means for specifying the positions of a plurality of portable terminal devices based on the second time until the second measurement sound output from the built-in speaker reaches the built-in microphone of another portable terminal device; It has.

  By setting the positions of the plurality of portable terminal devices as listening positions, any position can be set as the listening position, and the degree of freedom in setting the plurality of listening positions can be increased. In addition, the setting accuracy of the positions of the plurality of mobile terminal devices can be improved by taking into account the arrival time of the measurement sound corresponding to the distance between the plurality of mobile terminal devices.

  Moreover, it is preferable that the output of the measurement sound from each of the plurality of speakers described above and the input / output of the measurement sound in the portable terminal device are performed at time synchronized timing. This makes it possible to easily measure the first and second times from when the first and second measurement sounds are output until the mobile terminal device is reached.

  The mobile terminal device further includes a communication unit that transmits and receives information to and from the plurality of mobile terminal devices, and the mobile terminal position specifying unit uses the communication unit to determine the arrival time of the first measurement sound in the plurality of mobile terminal devices. It is desirable to obtain and calculate the time from the output time of the first measurement sound by the plurality of speakers to the arrival time of the first measurement sound as the first time. The portable terminal position specifying unit described above acquires the arrival time of the second measurement sound in another portable terminal device using the communication unit, and outputs the second measurement sound from the built-in speaker of the one portable terminal device. It is desirable to calculate the time from the time until the arrival time of the second measurement sound as the second time. Thereby, the distance between a speaker and a portable terminal device and the distance between portable terminal devices can be calculated | required easily.

  Further, the mobile terminal position specifying unit described above verifies the positions of the plurality of mobile terminal devices calculated based on the first time based on the distances between the plurality of mobile terminal devices calculated based on the second time. It is desirable to do. Alternatively, the mobile terminal position specifying unit described above determines whether or not the positions of the plurality of mobile terminal devices calculated based on the first time are based on the distance between the plurality of mobile terminal devices calculated based on the second time. It is desirable to judge. Further, the mobile terminal position specifying unit described above corrects the positions of the plurality of mobile terminal devices calculated based on the first time based on the distances between the plurality of mobile terminal devices calculated based on the second time. It is desirable to do. This makes it possible to verify and correct the position of the mobile terminal device calculated using the measurement sound output from the speaker, and improve the position setting accuracy of a plurality of mobile terminal devices.

  Further, it is desirable that the plurality of speakers and the portable terminal position specifying means described above are mounted on a vehicle, and the plurality of portable terminal devices are arranged in the vehicle interior. As a result, it is possible to set a plurality of arbitrary positions in the vehicle interior as listening positions with high accuracy.

  Moreover, it is desirable that the above-described time-synchronized timing is a timing that is synchronized using time information included in a signal received from a GPS satellite. As a result, time synchronization can be easily achieved simply by receiving time information using a GPS receiver provided in the mobile terminal device.

It is a figure which shows the structure of the vehicle-mounted system of one Embodiment. It is a figure which shows the structure of a portable terminal device. It is a flowchart which shows the operation | movement procedure of a vehicle-mounted apparatus. It is a flowchart which shows the operation | movement procedure of one portable terminal device. It is a flowchart which shows the operation | movement procedure of the other portable terminal device. It is explanatory drawing of position specification of a portable terminal device. It is explanatory drawing of the specific example used as correction | amendment object. It is a figure which shows the specific example used as the object of position determination re-execution without becoming correction object.

  Hereinafter, an in-vehicle system according to an embodiment to which a listening position setting device of the present invention is applied will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an in-vehicle system according to an embodiment. As shown in FIG. 1, the in-vehicle system of the present embodiment includes an in-vehicle device 1 and a plurality (for example, two) of mobile terminal devices 90 (90A, 90B).

  The in-vehicle device 1 includes a navigation processing unit 10, an audio processing unit 20, speakers 22FR, 22FL, 22RR, 22RL, an operation unit 30, an input control unit 32, a display processing unit 34, a display device 36, a hard disk device (HDD) 40, and a control. Part 50 and a Bluetooth interface part (BT IF) 60.

  The navigation processing unit 10 performs a navigation operation for guiding the traveling of the vehicle on which the in-vehicle device 1 is mounted, using the map data stored in the hard disk device 40. Used in conjunction with the GPS device 12 for detecting the position of the host vehicle, the navigation operation for guiding the running of the vehicle searches for and displays peripheral facilities and POIs (Point Of Interest) in addition to map display and route search / guidance. Etc. are included. The vehicle position detection may be performed using a combination of autonomous navigation sensors such as a gyro sensor and a vehicle speed sensor in addition to the GPS 12.

  The audio processing unit 20 performs a process of reading and reproducing music data and the like that are compressed and stored in the hard disk device 40. Note that music data or the like is read from a CD or DVD using a disk reader (not shown) or received from the portable terminal device 90 or the like via the Bluetooth interface unit 60. May be used. In the present embodiment, there are four speakers at the front, rear, left and right in the vehicle, specifically, the speaker 22FR at the front right of the driver's seat, the speaker 22FL at the front left of the passenger seat, and the speaker 22RR at the right rear of the rear seat, A speaker 22RL is installed at the rear left of the rear seat. These four loudspeakers 22FR, 22FL, 22RR, and 22RL receive audio signals that are controlled in sound pressure, output timing, phase, and the like from the audio processing unit 20 in consideration of a plurality of listening positions. A predetermined sound field is realized. Note that the number of speakers may be other than four.

  The operation unit 30 is for receiving an operation by the user on the in-vehicle device 1 and includes various operation keys, operation switches, operation knobs, and the like arranged around the display device 36. Further, when various operation screens and input screens are displayed on the display device 36, the display items of the operation screens and input screens can be obtained by directly pointing a part of these operation screens and input screens with a finger or the like. A touch panel that detects the position of the finger pointed to is a part of the operation unit 30 in order to enable operation using such an operation screen or an input screen. As provided. Instead of using the touch panel, a part of the operation screen or the input screen may be selected according to a user instruction using a remote control unit or the like. The input control unit 32 monitors the operation unit 30 and determines the operation content.

  The display processing unit 34 outputs video signals for displaying various operation screens, input screens, and the like, displays these screens on the display device 36, and displays map images and the like created by the navigation operation by the navigation processing unit 10. A video signal to be displayed is output and these screens are displayed on the display device 36. The display device 36 is installed in the center front of the driver seat and the passenger seat, and is configured by using, for example, a liquid crystal display device (LCD).

  The control part 50 is for controlling the whole vehicle-mounted apparatus 1, and is implement | achieved by running the predetermined program stored in ROM, RAM, etc. by CPU. The Bluetooth interface unit 60 is a communication device (Bluetooth device) that transmits and receives various data between the in-vehicle device 1 and the mobile terminal device 90 by Bluetooth.

  In addition, the control unit 50 described above searches and pairs with the surrounding Bluetooth devices, and specifies the positions of a plurality of mobile terminal devices 90 arranged in the vehicle interior, and a BT (Bluetooth) processing unit 51, It has a time setting unit 52, a measurement sound output unit 53, an arrival time acquisition unit 54, a listening position calculation unit 55, an inter-terminal information acquisition unit 56, and a listening position determination unit 57.

  The BT processing unit 51 performs settings necessary for transmitting / receiving data with the mobile terminal device 90 via Bluetooth, such as pairing settings.

  The time setting unit 52 sets the time common to these operations in order to perform the operation of the in-vehicle device 1 and the operation of each mobile terminal device 90 at the time synchronized timing. For example, the time is set so as to be synchronized with the time information included in the signal received from the GPS satellite by the GPS receiver 12.

  The measurement sound output unit 53 outputs a predetermined measurement sound (first measurement sound) from the speaker in order to specify the positions of the two portable terminal devices 90. For example, this position is specified using the speaker 22FR and the speaker FL. A specific output procedure will be described later.

  The arrival time acquisition unit 54 acquires the time at which the measurement sounds output from the speakers 22FR and 22FL arrive at the two mobile terminal devices 90. For example, information including the arrival time of the measurement sound is transmitted from each mobile terminal device 90 via Bluetooth, and the arrival time is extracted from this information.

  The listening position calculation unit 55 determines the time until the measurement sound output from one speaker 22FR reaches one mobile terminal device 90 and the measurement sound output from the other speaker 22FL to one mobile terminal device 90. Based on the time to reach, the position of the one mobile terminal device 90 is calculated. In addition, the listening position calculation unit 55 determines the time until the measurement sound output from one speaker 22FR reaches the other mobile terminal device 90 and the measurement sound output from the other speaker 22FL. The position of the other mobile terminal device 90 is calculated based on the time until it reaches 90.

  The inter-terminal information acquisition unit 56 is information necessary for calculating the time until the measurement sound (second measurement sound) output from one mobile terminal device 90 reaches the other mobile terminal device 90 (for example, The measurement sound output time in one mobile terminal device 90 and the arrival time of the measurement sound in the other mobile terminal device 90 are acquired. This information is transmitted from each mobile terminal device 90 via Bluetooth and received by the inter-terminal information acquisition unit 56.

  The listening position determination unit 57 verifies and corrects the position of each mobile terminal device 90 calculated by the listening position calculation unit 55 based on the distance obtained by the inter-terminal arrival time acquired by the inter-terminal information acquisition unit 56.

  The time setting unit 52, the measurement sound output unit 53, the arrival time acquisition unit 54, the listening position calculation unit 55, the inter-terminal information acquisition unit 56, and the listening position determination unit 57 described above are used as the mobile terminal position specifying unit, and the Bluetooth interface unit 60. Corresponds to each communication means.

  FIG. 2 is a diagram illustrating a configuration of the mobile terminal device 90. As shown in FIG. 2, the mobile terminal device 90 of this embodiment is generally called a smartphone, and has functions of a mobile phone and a mobile information terminal. The portable terminal device 90 includes a control unit 100, an operation unit 110, a display unit 112, a digital-analog converter (D / A) 114, a speaker 116, a microphone 118, an analog-digital converter (A / D) 120, a GPS. (Global Positioning System) A receiver 130, a telephone processing unit 140, and a Bluetooth interface unit (BT I / F) 150 are provided.

  The control unit 100 is for controlling the entire mobile terminal device 90, and includes a CPU, a RAM, a ROM, etc., and is stored in a program or memory (not shown) stored in the RAM or ROM. Various operations are performed by executing various application programs.

  The operation unit 110 includes a numeric keypad, other keys, and various switches, and accepts user operation instructions and various inputs. Using the operation unit 110 configured with a touch panel, the user may point the numeric keypad displayed on the screen with a finger or the like. The display unit 112 is configured by an LCD (Liquid Crystal Display) or the like, and displays operation content using the operation unit 110, control content and processing content (such as map display) by the control unit 100, and the like.

  The digital-analog converter 114 converts voice data and measured sound data when the mobile terminal device 90 is used as a telephone into an analog signal and outputs the analog signal from the speaker 116. The microphone 118 collects ambient sounds and measurement sounds. The collected sound and measurement sound are converted into digital data by the analog-digital converter 120.

  The GPS receiver 130 receives signals transmitted from a plurality of GPS satellites, and outputs positioning data indicating the position of the own device (own vehicle position) at predetermined time intervals. The telephone processing unit 140 performs processing as a mobile phone. For example, the telephone processing unit 140 performs outgoing / incoming processing with a base station to perform telephone call processing, Internet connection processing, and the like.

  The Bluetooth interface unit 150 is a communication device (Bluetooth device) that transmits and receives various data between the mobile terminal device 90 and the in-vehicle device 1 by Bluetooth.

  In addition, the control unit 100 described above searches and pairs with surrounding Bluetooth devices, inputs and outputs measurement sound between the two portable terminal devices 90 arranged in the vehicle interior, and transmits the information to the in-vehicle device 1. BT processing unit 101, time setting unit 102, measurement sound collection unit 103, arrival time transmission unit 104, measurement sound output unit 105, and measurement sound output time transmission unit 106.

  The BT processing unit 101 performs settings necessary for transmitting and receiving data with Bluetooth from the in-vehicle device 1, for example, pairing settings.

  The time setting unit 102 sets a common time for these operations in order to perform the operation of the in-vehicle device 1 and the operation of each portable terminal device 90 at the time synchronized timing. For example, the time is set so as to be synchronized with the time information included in the signal received from the GPS satellite by the GPS receiver 130.

  The measurement sound collection unit 103 is a measurement sound (first measurement sound) output from each of the speakers 22FR and 22FL of the in-vehicle device 1 or a measurement sound (second measurement sound) output from another mobile terminal device 90. ) Are collected by the microphone 118 and their arrival times are measured.

  The arrival time transmitting unit 104 transmits information including the arrival time measured by the measurement sound collecting unit 103 to the in-vehicle device 1 via Bluetooth.

  The measurement sound output unit 105 outputs the measurement sound (second measurement sound) from the speaker 116 toward the other mobile terminal device 90.

  The measurement sound output time transmission unit 106 transmits information including the time when the measurement sound (second measurement sound) is output from the speaker 116 toward the other mobile terminal device 90 toward the in-vehicle device 1 via Bluetooth.

  The in-vehicle system of the present embodiment has such a configuration, and next, two portable terminal devices 90 arranged at two positions separated from each other assuming the listening positions of two users. The operation for specifying the position will be described.

  FIG. 3 is a flowchart showing an operation procedure of the in-vehicle device 1. At the time of starting this operation procedure, it is assumed that the two portable terminal devices 90 are held at their listening positions (for example, the positions of their faces and ears) by two users.

  Initially, the time setting part 52 sets time so that it may synchronize with the time information contained in the signal received from the GPS satellite (step 100).

  Next, the measurement sound output unit 53 outputs a measurement sound (first measurement sound) from one speaker A (for example, the speaker 22FR) at a predetermined time t1 (step 102). When the measurement sound reaches the two portable terminal devices 90, the arrival time A1 of the measurement sound is transmitted from one portable terminal device 90, and the arrival time A2 of the measurement sound is transmitted from the other portable terminal device 90. Is sent. The arrival time acquisition unit 54 receives and acquires these arrival times A1 and A2 (steps 104 and 106).

  Similarly, the measurement sound output unit 53 outputs the measurement sound (first measurement sound) from the other speaker B (for example, the speaker 22FL) at a predetermined time t2 (step 108). When the measurement sound reaches the two portable terminal devices 90, the arrival time B1 of the measurement sound is transmitted from one portable terminal device 90, and the arrival time B2 of the measurement sound is transmitted from the other portable terminal device 90. Is sent. The arrival time acquisition unit 54 receives and acquires these arrival times B1 and B2 (steps 110 and 112).

  Next, the listening position calculation unit 55 determines the positions (listening positions) P1 of the two portable terminal devices 90 based on the four arrival times A1, A2, B1, and B2 acquired in Steps 104, 106, 110, and 112. P2 is calculated (step 114). A specific example of calculating these two positions P1 and P2 will be described later.

  Next, the inter-terminal information acquisition unit 56 acquires the output time t3 of the measurement sound (second measurement sound) from one mobile terminal device 90 (step 116), and receives the measurement sound from the other mobile terminal device 90. The arrival time C is acquired (step 118).

  Next, the listening position determination unit 57 calculates the distance L3 (= v (C−t3)) corresponding to the required time C−t3 of the measurement sound between the two portable terminal devices 90 from the acquired times t3 and C. In addition to the calculation, the two listening positions P1 and P2 calculated in step 114 are verified and corrected based on the distance L3 (step 120). Specific examples of verification and correction of these two positions P1 and P2 will be described later.

  FIG. 4 is a flowchart showing an operation procedure of one mobile terminal device 90. For example, the operation procedure of the mobile terminal device 90 on the side that outputs the measurement sound toward the other mobile terminal device 90 is shown.

  First, the time setting unit 102 sets the time so as to be synchronized with the time information included in the signal received from the GPS satellite (step 200).

  Next, the measurement sound collection unit 103 collects the measurement sound output from one speaker A (speaker 22FR) of the in-vehicle device 1 with the microphone 118 (step 202), and the arrival time transmission unit 104 performs this measurement. The sound arrival time A1 is transmitted to the in-vehicle device 1 (step 204).

  The measurement sound collecting unit 103 collects the measurement sound output from the other speaker B (speaker 22FL) of the in-vehicle device 1 with the microphone 118 (step 206), and the arrival time transmitting unit 104 detects the measurement sound. Is transmitted to the in-vehicle device 1 (step 208).

  Next, the measurement sound output unit 105 outputs a measurement sound (second measurement sound) from the built-in speaker 116 at a predetermined time t3 (step 210). Further, the measurement sound output time transmission unit 106 transmits this time t3 toward the in-vehicle device 1 (step 212).

  FIG. 5 is a flowchart showing an operation procedure of the other mobile terminal device 90. For example, an operation procedure of the other mobile terminal device 90 on the side that collects the measurement sound output from one mobile terminal device 90 is shown.

  First, the time setting unit 102 sets the time so as to synchronize with the time information included in the signal received from the GPS satellite (step 300).

  Next, the measurement sound collection unit 103 collects the measurement sound output from one speaker A (speaker 22FR) of the in-vehicle device 1 with the microphone 118 (step 302), and the arrival time transmission unit 104 performs this measurement. The sound arrival time A2 is transmitted to the in-vehicle device 1 (step 304).

  The measurement sound collection unit 103 collects the measurement sound output from the other speaker B (speaker 22FL) of the in-vehicle device 1 with the microphone 118 (step 306), and the arrival time transmission unit 104 detects the measurement sound. Is transmitted to the in-vehicle device 1 (step 308).

  Next, the measurement sound collection unit 103 collects the measurement sound output from the speaker 116 built in one portable terminal device 90 with the microphone 118 (step 310), and the arrival time transmission unit 104 performs this measurement. The sound arrival time C is transmitted to the in-vehicle device 1 (step 312).

  Next, a specific example of an operation for calculating the positions P1 and P2 of the mobile terminal device 90 performed in the in-vehicle device 1 and performing verification and correction will be described.

  FIG. 6 is an explanatory diagram of specifying the position of the mobile terminal device 90. Since the time when the measurement sound is output from one speaker 22FR is t1, and the time when the measurement sound reaches one mobile terminal device 90A is A1, the time required for the measurement sound between the speaker 22FR and the mobile terminal device 90A is A1-t1. When the sound speed is v, La1 is v (A1-t1).

  Similarly, since the time when the measurement sound is output from one speaker 22FR is t1, and the time when this measurement sound reaches the other mobile terminal device 90B is B1, the time required for the measurement sound between the speaker 22FR and the mobile terminal device 90B is as follows. B1-t1, and the distance La2 when the sound speed is v is v (B1-t1).

  Since the time when the measurement sound is output from the other speaker 22FL is t2, and the time when the measurement sound reaches one mobile terminal device 90A is A2, the time required for the measurement sound between the speaker 22FL and the mobile terminal device 90A is A2. -T2, and the distance when the sound speed is v is Lb1 is v (A2-t2).

  Since the time when the measurement sound is output from the other speaker 22FL is t2, and the time when the measurement sound reaches the other mobile terminal device 90B is B2, the time required for the measurement sound between the speaker 22FL and the mobile terminal device 90B is B2-t2. The distance Lb2 when the sound speed is v is v (B1-t1).

  FIG. 6 shows the relationship between these four distances La1, La2, Lb1, and Lb2. A position P1 at which a circle having a radius of each of distances La1 and Lb1 intersects is defined as the position and distance of one mobile terminal device 90A. A position P2 where circles having radii of La2 and Lb2 intersect can be set as the position of the other mobile terminal device 90B. These circles also intersect at the positions P10 and P20 behind the speakers 22FR and 22FL, but these positions P1 ′ and P2 ′ are not included in the vehicle interior, so that the mobile terminal devices 90A and 90B are arranged. It can be excluded from position candidates.

  Further, as described above, the distance corresponding to the time required for the measurement sound output from one mobile terminal device 90A to reach the other mobile terminal device 90B is L3 (= v (C−t3)), Ideally, the distance L3 and the distance between the two positions P1 and P2 described above should match. However, since each value actually includes an error, it does not always match.

  Therefore, the listening position determination unit 57 calculates the calculated position P1, if the distance between P1 and P2 is included in a predetermined range centered on the distance L3 (for example, within ± 5% of the distance L3). Verification (propriety determination) is performed on the assumption that P2 is correct. On the other hand, in the case of deviating from the predetermined range centered on the distance L3, the positions P1 and P2 are corrected when the degree of deviation is small, and when the degree of deviation is large, a series of processing relating to the determination of the positions P1 and P2 is performed again. Implemented (displays prompting re-execution, etc.).

  FIG. 7 is an explanatory diagram of a specific example to be corrected. A circle centered on P1 and having a radius L3 is S1, and intersections P2 ′ and P2 ″ between the circles S3 and S4 passing through P2 and the circle S1 are correction candidates for the position P2 (in circles S3 and S4, (There are two intersections with the circle S1, but the intersection on the side closer to P2 is adopted as a correction candidate.) Similarly, a circle having a distance L3 as a center around P2 is S2 and passes through P1. The intersection P1 ′ between S5 and the circle S2 is set as a correction candidate for the position P1 (the circle S5 has two intersections with the circle S2, but the intersection close to P1 is adopted as the correction candidate).

  After the correction candidates are set in this way, the straight line connecting P1 and P1 ′ and the triangle formed by P2 and P2 ′ and P2 ″ are used as determination areas for determining whether to perform correction, When these determination areas are smaller than a predetermined reference value, correction is performed, for example, when the length of the straight line is equal to or smaller than a predetermined value, or when the area of the triangle or the length of the longest side is equal to or smaller than a predetermined value As a specific content of the correction, for example, the center of gravity G1 of the straight line is set to the position P1 of the mobile terminal device 90A after correction, and the center of gravity G2 of the triangle is corrected. The position is P2 of the mobile terminal device 90B.

  FIG. 8 is a diagram illustrating a specific example of a position determination re-execution target that is not a correction target. A circle centered on P1 and having a radius L3 is S1, and an intersection P2 'between the circle S4 passing through P2 and the circle S1 is a correction candidate for the position P2. Similarly, a circle centered on P2 and having a radius L3 is S2, and an intersection P1 'between the circle S5 passing through P1 and the circle S2 is set as a correction candidate for the position P1.

  After the correction candidates are set in this way, each of the straight line connecting P1 and P1 'and the straight line connecting P2 and P2' is set as a determination area for determining whether to perform correction. The example shown in FIG. 8 is a case where the length of these straight lines is longer than a predetermined value, and is not an object of correction, and the listening position determination unit 57 gives an instruction to reset the positions P1 and P2. Is called.

  As described above, in the in-vehicle system of the present embodiment, by setting the positions of the plurality of mobile terminal devices 90 as the listening positions, it is possible to set an arbitrary position as the listening position, and a plurality of degrees of freedom for setting the listening positions. Can be increased. Further, by taking into account the arrival time of the measurement sound corresponding to the distance between the plurality of portable terminal devices 90, the setting accuracy of the positions of the plurality of portable terminal devices 90 can be improved.

  In addition, measurement sound output from each of the plurality of speakers 22FR and 22FL and measurement sound input / output in the mobile terminal device 90 are performed at time synchronized timing, so that measurement sound is output from each speaker 22FR and 22FL. It is possible to easily measure the time until reaching each mobile terminal device 90 and the time from when the measurement sound is output from one mobile terminal device 90 until reaching the other mobile terminal device 90. .

  In particular, verification of the position of the mobile terminal device 90 calculated using the measurement sound output from each of the speakers 22FR and 22FL by using the distance calculated based on the measurement sound input / output between the mobile terminal devices 90, Appropriateness determination and correction can be performed, and the setting accuracy of the positions of the plurality of mobile terminal devices 90 can be improved.

  In addition, by applying it when mounted on a vehicle, it is possible to set a plurality of arbitrary positions in the passenger compartment as listening positions with high accuracy.

  Further, the time information is received using the GPS receiver provided in the mobile terminal device 90 by setting the time synchronized timing to the time synchronized using the time information included in the signal received from the GPS satellite. Time synchronization can be easily achieved with just this.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, the measurement sound is output from the speakers 22FR and 22FL. However, the measurement sound may be output from the other speakers 22RR and 22RL, or these may be combined. In addition, although two listening positions are set using two portable terminal devices 90, three or more listening positions may be set using three or more portable terminal devices 90.

  In the above-described embodiment, the in-vehicle device 1 and each portable terminal device 90 are connected via Bluetooth, but may be connected by other connection methods (for example, a wireless LAN or a USB cable).

  In the above-described embodiment, the present invention is applied to the in-vehicle system to set the listening position in the vehicle interior. However, the present invention may be applied to setting a plurality of listening positions indoors or outdoors.

  As described above, according to the present invention, by setting the positions of a plurality of portable terminal devices as listening positions, any position can be set as the listening position, and the degree of freedom of setting the plurality of listening positions is increased. be able to. In addition, the setting accuracy of the positions of the plurality of mobile terminal devices can be improved by taking into account the arrival time of the measurement sound corresponding to the distance between the plurality of mobile terminal devices.

1 In-vehicle device 12, 130 GPS receiver 22FR, 22FL, 22RR, 22R, 116 Speaker 50, 100 Control unit 60, 150 Bluetooth interface unit (BT IF)
51, 101 BT (Bluetooth) processing unit 52, 102 Time setting unit 53, 105 Measurement sound output unit 54 Arrival time acquisition unit 55 Listening position calculation unit 56 Inter-terminal information acquisition unit 57 Listening position determination unit 90 (90A, 90B) Terminal device 118 Microphone 103 Measurement sound collection unit 104 Arrival time transmission unit 106 Measurement sound output time transmission unit

Claims (9)

A plurality of speakers installed at predetermined positions;
A plurality of portable terminal devices arranged at a plurality of positions separated from each other assuming a plurality of listening positions of the user;
A first time until the first measurement sound output from each of the plurality of speakers reaches each of the built-in microphones of the plurality of portable terminal devices, and the output from the built-in speaker of the one portable terminal device Portable terminal position specifying means for specifying the positions of the plurality of portable terminal devices based on the second time until the second measurement sound to reach the built-in microphone of the other portable terminal device;
A listening position setting device comprising: In claim 1,
The listening position setting device, wherein the output of the measurement sound from each of the plurality of speakers and the input / output of the measurement sound in the portable terminal device are performed at time synchronized timing. In claim 2,
A communication means for transmitting / receiving information to / from the plurality of portable terminal devices;
The portable terminal position specifying unit acquires the arrival time of the first measurement sound in the plurality of portable terminal devices using the communication unit, and outputs the first measurement sound from the plurality of speakers from the output time of the first measurement sound. A listening position setting device that calculates the time until the arrival time of the first measurement sound as the first time. In claim 3,
The portable terminal position specifying unit acquires the arrival time of the second measurement sound in another portable terminal device by using the communication unit, and the second measurement sound by a built-in speaker of the one portable terminal device. The listening position setting device is characterized in that the time from the output time to the arrival time of the second measurement sound is calculated as the second time. In any one of Claims 1-4,
The portable terminal position specifying means is configured to determine the positions of the plurality of portable terminal devices calculated based on the first time based on the distances between the plurality of portable terminal devices calculated based on the second time. A listening position setting device characterized by verifying. In any one of Claims 1-4,
The mobile terminal position specifying means determines whether the position of the plurality of mobile terminal devices calculated based on the first time is the distance between the plurality of mobile terminal devices calculated based on the second time. A listening position setting device that makes a determination based on the determination. In any one of Claims 1-4,
The portable terminal position specifying means is configured to determine the positions of the plurality of portable terminal devices calculated based on the first time based on the distances between the plurality of portable terminal devices calculated based on the second time. A listening position setting device for correcting. In any one of Claims 1-7,
The listening position setting device, wherein the plurality of speakers and the portable terminal position specifying means are mounted on a vehicle, and the plurality of portable terminal devices are arranged in a vehicle interior. In any one of Claims 2-4,
The listening position setting device, wherein the time synchronization timing is a synchronization timing using time information included in a signal received from a GPS satellite.

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