JP6807756B2 - Wireless communication system, wireless communication device, and wireless communication method - Google Patents

Description

The present invention relates to wireless communication systems, wireless communication devices, and wireless communication methods.

Conventionally, a wireless communication system (print system) that wirelessly communicates between a first wireless communication device (host device) and a second wireless communication device (image forming device) is known (see, for example, Patent Document 1). ).

Japanese Unexamined Patent Publication No. 2006-155036

In a system for wireless communication between a first wireless communication device and a second wireless communication device, such as the wireless communication system described in Patent Document 1 described above, between the first wireless communication device and the second wireless communication device. In some cases, it may be required that the second wireless communication device acquire information on wireless communication before the communicable state is established. For example, when the first wireless communication device and the second wireless communication device are Bluetooth (registered trademark) devices, in order to perform pairing between these devices, before a communicable state is established between these devices. , The second wireless communication device is required to acquire the password information used for pairing. Conventionally, when the second wireless communication device is made to acquire information related to wireless communication, the user inputs the information, the work is complicated, and there is a problem in the convenience of the user.
The present invention has been made in view of the above circumstances, and an object of the present invention is to improve user convenience with respect to a wireless communication system, a wireless communication device, and a wireless communication method.

In order to achieve the above object, the present invention relates to a wireless communication system including a first wireless communication device and a second wireless communication device capable of communicating with the first wireless communication device. A guide sound storage unit that stores the guide sound, a setting sound generation unit that generates a setting sound having a time length equal to or less than the time length of the guide sound based on a character string representing information related to wireless communication, and the guide sound. The second wireless communication device has an output unit that outputs a synthetic sound obtained by synthesizing and the set sound, and the second wireless communication device includes an audio sound collecting unit that collects the synthetic sound output from the output unit, and the sound collecting unit. The guide sound detection unit that detects the guide sound from the synthetic sound picked up by the voice sound collecting unit, and the guide sound and the separated sound from the synthetic sound based on the guide sound detected by the guide sound detection unit. It is characterized by having a sound source separation unit for separating the above, a setting sound extraction unit for extracting the set sound from the separated sound, and a text conversion unit for converting the set sound into the character string.

Further, the present invention is characterized in that the character string includes device identification information for identifying the first wireless communication device during wireless communication.

Further, the present invention is characterized in that the character string includes password information used for causing the first wireless communication device to authenticate the second wireless communication device.

Further, the present invention is characterized in that the set sound generation unit encrypts the character string and generates the set sound based on the encrypted character string.

Further, the present invention is characterized in that the tone color of the set sound is a piano sound.

Further, in order to achieve the above object, the wireless communication device of the present invention is generated based on a guide sound and a character string representing information related to wireless communication, and is set to have a time length equal to or less than the time length of the guide sound. A sound pick-up unit that picks up a synthetic sound in which sounds are combined, a guide voice detection unit that detects the guide sound included in the synthetic sound collected by the voice sound pick-up unit, and the guide voice detection unit. Based on the guide sound detected by, a sound source separation unit that separates the guide sound and the separated sound from the synthetic sound, a setting sound extraction unit that extracts the set sound from the separated sound, and the set sound It is characterized by having a text conversion unit for converting into a character string.

Further, in order to achieve the above object, in the wireless communication method between the first wireless communication device and the second wireless communication device, the first wireless communication device stores a guide sound and information on wireless communication. Based on the character string representing, a set sound having a time length equal to or less than the time length of the stored guide sound is generated, a synthetic sound obtained by synthesizing the guide sound and the set sound is output, and the second radio is output. The communication device picks up the synthetic sound, detects the guide sound included in the collected synthetic sound, and separates the guide sound and the separated sound from the synthetic sound based on the detected guide sound. Then, the set sound is extracted from the separated sound, and the extracted set sound is converted into the character string.

According to the present invention, the convenience of the user can be improved.

The functional block diagram of the in-vehicle device provided in the wireless communication system. Schematic diagram of the in-vehicle device side setting sound table. Functional block diagram of a mobile terminal provided in a wireless communication system. A flowchart showing the operation of the wireless communication system when pairing is performed. The schematic diagram which shows the pairing start notification screen. The schematic diagram which shows an example of the device registration start screen. A flowchart showing the details of the setting sound generation process. Explanatory drawing of encryption identification information. A flowchart showing the details of the text conversion process. Explanatory drawing of generation of note name identification information.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The wireless communication system 100 according to the present embodiment includes an in-vehicle device 1 (first wireless communication device) and a mobile terminal 3 (second wireless communication device). The in-vehicle device 1 and the mobile terminal 3 each have a function of communicating according to the Bluetooth standard, and after the pairing between these devices is completed, the in-vehicle device 1 and the mobile terminal 3 can communicate according to the Bluetooth standard.

First, with reference to FIG. 1, a detailed configuration of the in-vehicle device 1 included in the wireless communication system 100 according to the embodiment of the present invention will be described.

FIG. 1 is a functional block diagram of an in-vehicle device 1 included in the wireless communication system 100.
The in-vehicle device 1 is a device mounted on a vehicle. The in-vehicle device 1 has a function of detecting the current position of the vehicle, a function of displaying the current position of the vehicle on a map, and a function of searching for a route to the destination. , And, it is a so-called car navigation system having a function of displaying a map, displaying a route to a destination on the map, and guiding a route to the destination.

As shown in FIG. 1, the in-vehicle device 1 includes an in-vehicle device control unit 10, an operation unit 11, an in-vehicle device touch panel 13, an in-vehicle device wireless communication unit 15, a voice output unit 17 (output unit), and a GPS unit. It has 20, a relative orientation detection unit 18, and an in-vehicle device storage unit 14.

The in-vehicle device control unit 10 includes a CPU, ROM, RAM, ASIC, signal processing circuit, and the like, and controls each unit of the in-vehicle device 1. In the in-vehicle device control unit 10, for example, the CPU reads the program stored in the ROM into the RAM and executes the processing, executes the processing by the function implemented in the ASIC, for example, and performs the signal processing in the signal processing circuit, for example. Perform processing by hardware and software, such as performing processing. The in-vehicle device control unit 10 includes a setting sound generation unit 10a as a functional block. The setting sound generation unit 10a will be described later.

The operation unit 11 has an operation button provided in the housing of the vehicle-mounted device 1, detects an operation on the operation button by the user, and outputs a signal corresponding to the detected operation to the vehicle-mounted device control unit 10. The in-vehicle device control unit 10 executes a process corresponding to an operation on the operation button based on the operation signal input from the operation unit 11.
The operation unit 11 has at least a device registration screen display button 11a as an operation button. The processing of the in-vehicle device control unit 10 when the device registration screen display button 11a is operated by the user will be described later.

The in-vehicle device touch panel 13 includes a liquid crystal display panel, a display panel such as an organic EL panel, and displays an image on the display panel under the control of the in-vehicle device control unit 10.
Further, the in-vehicle device touch panel 13 includes a touch sensor arranged so as to be superimposed on the display panel, detects an operation on the in-vehicle device touch panel 13 by the user, and outputs a signal corresponding to the detected operation to the in-vehicle device control unit 10. The in-vehicle device control unit 10 executes a process corresponding to the operation of the in-vehicle device touch panel 13 by the user based on the input from the in-vehicle device touch panel 13.

The in-vehicle device wireless communication unit 15 includes a link manager, a link controller, a high-frequency circuit, an antenna, and other wireless communication modules, and under the control of the in-vehicle device control unit 10, wirelessly communicates with an external device according to Bluetooth.

The audio output unit 17 includes an audio signal synthesis circuit, a D / A converter, an amplifier circuit, a speaker, and the like, and is controlled by the in-vehicle device control unit 10 to convert an audio signal input from the in-vehicle device control unit 10 into a D / A converter. Digital / analog conversion is performed by, amplified by an amplifier circuit, and output as audio from a speaker (not shown).
In particular, when a plurality of different audio signals are input from the in-vehicle device control unit 10, the audio output unit 17 synthesizes a plurality of audio signals in the audio signal synthesis circuit and outputs the plurality of audio signals to the D / A converter. The audio is output in a state in which the audio based on the audio signal is synthesized.

The GPS unit 20 receives GPS radio waves from GPS satellites via GPS antennas (not shown), and calculates the current location of the vehicle and the traveling direction of the vehicle from the GPS signals superimposed on the GPS radio waves. The GPS unit 20 outputs the calculated information indicating the current location of the vehicle and the calculated information indicating the traveling direction of the vehicle to the in-vehicle device control unit 10.

The relative orientation detection unit 18 includes a gyro sensor and an acceleration sensor. The gyro sensor is composed of, for example, a vibrating gyro, and detects the relative orientation of the vehicle (for example, the amount of turning in the yaw axis direction). The acceleration sensor detects the acceleration acting on the vehicle (for example, the inclination of the vehicle with respect to the traveling direction). The relative orientation detection unit 18 outputs information indicating the relative orientation of the detected vehicle and information indicating the acceleration acting on the detected vehicle to the in-vehicle device control unit 10.

The in-vehicle device storage unit 14 includes a non-volatile memory and stores various data. The in-vehicle device storage unit 14 includes an in-vehicle device side corresponding sound information storage unit 141, a master side communication information storage unit 142, and a guide voice storage unit 143.

In the following description, when a number is represented by a hexadecimal number, "0x" is added before the hexadecimal number such as "0x1" or "0xf", and the number is represented by a decimal number. Distinguish. Further, a number represented by a hexadecimal number is particularly referred to as a "hexary number". In particular, the 16 hexadecimal numbers from "0x0" to "0xf" are referred to as "reference hexadecimal numbers".
Further, in the following explanation, the note name is expressed in English / American notation. In addition, as note names, for convenience, "low C", "low D", "low E", "low F", "low G", "low A", "low B", "medium C", "Medium D", "Medium E", "Medium F", "Medium G", "Medium A", "Medium B", "High C", "High D", "High E", "High F", It is assumed that there are "high G", "high A", and "high B". The correspondence between the pitch of each note and the MIDI (registered trademark) note number is as follows.
"Low C" → MIDI note number: 48. "Low D" → MIDI note number: 50. "Low E" → MIDI note number: 52. "Low F" → MIDI note number: 53. "Low G" → MIDI note number: 55. "Low A" → MIDI note number: 57. "Low B" → MIDI note number: 59. "Medium C" → MIDI note number: 60. "Medium D" → MIDI note number: 62. "Medium E" → MIDI note number: 64. "Medium F" → MIDI note number: 65. "Medium G" → MIDI note number: 67. "Medium A" → MIDI note number: 69. "Medium B" → MIDI note number: 70. "High C" → MIDI note number: 72. "High D" → MIDI note number: 74. "High E" → MIDI note number: 76. "High F" → MIDI note number: 77. "High G" → MIDI note number: 79. "High A" → MIDI note number: 81. "High B" → MIDI note number: 83.

The vehicle-mounted device-side compatible sound information storage unit 141 stores the vehicle-mounted device-side compatible sound table 141a.
FIG. 2 is a diagram schematically showing the contents of the sound table 141a corresponding to the vehicle-mounted device side in a mode suitable for explanation.
Here, in the present embodiment, one of the note names is assigned in advance for each of the reference hexadecimal numbers (each of "0x0" to "0xf"). The note names assigned to each of the reference hexadecimal numbers are different. The corresponding sound table is a table that manages the correspondence between each of the reference hexadecimal numbers and the note names assigned to each of the reference hexadecimal numbers.
As shown in FIG. 2, in the present embodiment, for example, the note name "low C" is assigned to the hexadecimal digit "0x0", and for example, the note is assigned to the hexadecimal digit "0x1". The name "Low D" is assigned.
How to use the sound table 141a corresponding to the in-vehicle device will be described later.

The master-side communication information storage unit 142 stores master-side communication information, which is information used when pairing the in-vehicle device 1 and the mobile terminal 3 corresponding to Bluetooth. In the present embodiment, the master-side communication information is at least the identification information used for identifying the in-vehicle device 1 as the master (hereinafter referred to as "in-vehicle device identification information") when pairing according to the Bluetooth standard. , Includes at least the password information used for pairing (sometimes called a passkey, password, passcode). The in-vehicle device identification information corresponds to the device identification information.

The guide voice storage unit 143 stores a voice file of the guide voice (hereinafter, referred to as “guide voice file”). The guide voice will be described later.

Further, the vehicle-mounted device storage unit 14 stores the map data 14a.
The map data 14a includes road image data used when drawing the shape of a road on a map, background image data used when drawing a background such as terrain on a map, a character string indicating an administrative division, and characters indicating an intersection name. It includes image data used for displaying a map such as character string image data used when drawing a character string such as a character string indicating a column or a road name on a map. Further, the map data 14a is used for searching for a route such as node information about a node corresponding to a connection point in a road network such as an intersection and link information about a link formed between nodes and a road formed between the nodes. Includes route information used for route guidance.

As described above, the in-vehicle device 1 has a function of detecting the current position of the vehicle, a function of displaying the current position of the vehicle on the map, and searching for a route to the destination. It has a function to search for a route and a function to display a map, display the route to the destination on the map, and guide the route to the destination. When detecting the position of the own vehicle, the in-vehicle device control unit 10 detects the current position of the vehicle based on the input from the GPS unit 20 and the relative orientation detection unit 18 and the map data 14a. The current position of the vehicle may be detected by any method, and at the time of detection, information other than the information exemplified in the present embodiment such as information indicating the vehicle speed may be used. Further, when displaying the vehicle position, the in-vehicle device control unit 10 displays a map of a predetermined scale centered on the detected current position on the in-vehicle device touch panel 13 based on the map data 14a, and also displays the detected current position of the vehicle. A mark indicating is displayed on the map. Further, in the route search, the in-vehicle device control unit 10 searches for a route from the detected current position to the destination set by the user based on the map data 14a. Further, upon route guidance, the in-vehicle device control unit 10 displays the route to the destination on the map, displays the current position of the detected vehicle on the map, and guides the route to the destination.

FIG. 3 is a functional block diagram of the mobile terminal 3 included in the wireless communication system 100.
The mobile terminal 3 is a portable terminal owned by a user boarding a vehicle equipped with the in-vehicle device 1. The mobile terminal 3 is, for example, a smartphone, and for example, a tablet-type computer.

As shown in FIG. 3, the mobile terminal 3 includes a mobile terminal control unit 30, a mobile terminal touch panel 31, a voice sound collecting unit 32, a mobile terminal storage unit 33, a mobile terminal wireless communication unit 34, and a mobile terminal network. It has a communication unit 35.

The mobile terminal control unit 30 includes a CPU, ROM, RAM, ASIC, signal processing circuit, and the like, and controls each unit of the mobile terminal 3. In the mobile terminal control unit 30, for example, the CPU reads the program stored in the ROM into the RAM and executes the processing, executes the processing by the function implemented in the ASIC, for example, and performs the signal processing in the signal processing circuit, for example. Perform processing by hardware and software, such as performing processing. The mobile terminal control unit 30 includes a guide voice detection unit 301, a sound source separation unit 302, a setting sound extraction unit 303, and a text conversion unit 304 as functional blocks. These functional blocks will be described later.

The mobile terminal touch panel 31 includes a liquid crystal display panel, a display panel such as an organic EL panel, and displays an image on the display panel under the control of the mobile terminal control unit 30.
Further, the mobile terminal touch panel 31 includes a touch sensor arranged so as to be superimposed on the display panel, detects an operation on the mobile terminal touch panel 31 by the user, and outputs the operation to the mobile terminal control unit 30. The mobile terminal control unit 30 executes a process corresponding to an operation on the mobile terminal touch panel 31 by the user based on the input from the mobile terminal touch panel 31.

The voice sound collecting unit 32 is connected to a microphone (not shown), performs necessary signal processing on a signal based on the sound picked up by the microphone, performs analog / digital conversion to generate voice data, and controls a mobile terminal. Output to unit 30.

The mobile terminal storage unit 33 has a non-volatile memory and stores various data.
The mobile terminal storage unit 33 stores the dedicated application AP. The dedicated application AP is an application having a function of executing a process (described later) related to pairing between the in-vehicle device 1 and the mobile terminal 3. The dedicated application AP is, for example, an application provided by a company that manufactures the in-vehicle device 1, and is installed on the mobile terminal 3 by a user by a predetermined means. A storage area in which the dedicated application AP can be used is formed in the mobile terminal storage unit 33.

The mobile terminal storage unit 33 has a sound information storage unit 331 corresponding to the mobile terminal side.
The mobile terminal-side compatible sound information storage unit 331 stores the mobile terminal-side compatible sound information table 331a in a storage area in which the above-mentioned dedicated application AP can be used.
The mobile terminal side compatible sound table 331a is a table having completely the same contents as the contents of the in-vehicle device side compatible sound table 141a described above. That is, the correspondence between the reference hexadecimal number and the note name managed by the in-vehicle device 1 and the correspondence between the reference hexadecimal number and the note name managed by the mobile terminal 3 are the same.

The mobile terminal wireless communication unit 34 includes a wireless communication module including a link manager, a link controller, a high frequency circuit, an antenna, and the like, and under the control of the mobile terminal control unit 30, wirelessly communicates with an external device according to Bluetooth.

The mobile terminal network communication unit 35, under the control of the mobile terminal control unit 30, communicates with an external device connected to a global network GN including a telephone network, the Internet, and other networks in accordance with a predetermined communication standard. .. The predetermined communication standard is, for example, HTTP, and for example, WebSocket.

By the way, the in-vehicle device 1 does not have a function of directly accessing the global network GN. Based on this, when accessing the global network GN, the in-vehicle device 1 uses the mobile terminal 3 for tethering. That is, the in-vehicle device 1 establishes a communication link with the mobile terminal 3 according to Bluetooth, establishes a state capable of communicating with the mobile terminal 3 according to Bluetooth, and accesses the global network GN via the mobile terminal 3. To do. For example, the in-vehicle device 1 accesses the global network GN via the mobile terminal 3, communicates with a predetermined server, acquires data for updating the map data 14a, and obtains the map data 14a based on the acquired data. Update.
Here, in order to establish a state in which the in-vehicle device 1 and the mobile terminal 3 can communicate with each other according to Bluetooth, pairing must be performed in advance between these devices.
Conventionally, when pairing is performed between the in-vehicle device 1 and the mobile terminal 3, it is necessary for the user to input information necessary for pairing into a predetermined user interface displayed on the mobile terminal 3. The work is complicated, and there is a problem in user convenience.
Based on the above, at the time of pairing, the in-vehicle device 1 and the mobile terminal 3 execute the following processes to improve user convenience.

FIG. 4 is a flowchart showing the operation of the in-vehicle device 1 and the mobile terminal 3 when pairing is performed. In FIG. 4, the flowchart FA shows the operation of the in-vehicle device 1, and the flowchart FB shows the operation of the mobile terminal 3.
At the time of pairing, the user first performs a predetermined operation on the mobile terminal touch panel 31 of the mobile terminal 3 to activate the dedicated application AP (step S1).
The process of the flowchart FB is executed by the mobile terminal control unit 30 by the function of the dedicated application AP started by the user in step S1.

As shown in the flowchart FB of FIG. 4, the mobile terminal control unit 30 displays the pairing start notification screen G1 on the mobile terminal touch panel 31 in response to the activation of the dedicated application AP (step SB1).

FIG. 5 is a diagram showing a pairing start notification screen G1.
As shown in FIG. 5, the pairing start notification screen G1 shows information indicating that pairing (registration of the mobile terminal 3 to the in-vehicle device 1) is started, and the device registration screen G2 (in-vehicle device 1) of the in-vehicle device 1. Information indicating that the operation should be performed for (see FIG. 6; described later) is displayed. By referring to the pairing start notification screen G1, the user can accurately recognize that the pairing is started and that it is necessary to operate the device registration screen G2 of the in-vehicle device 1.

Next, the mobile terminal control unit 30 starts recording the sound around the mobile terminal 3 (step SB2). More specifically, the mobile terminal control unit 30 controls the voice sound collecting unit 32 to start collecting the sound around the mobile terminal 3. As described above, the voice sound collecting unit 32 generates voice data based on the voice picked up by the microphone and outputs it to the mobile terminal control unit 30. The mobile terminal control unit 30 cumulatively stores the voice data input from the voice sound collection unit 32 in the mobile terminal storage unit 33 in response to the start of voice sound collection. Hereinafter, a set of voice data cumulatively stored in the mobile terminal storage unit 33 is referred to as “recorded data”.

The user who has referred to the pairing start notification screen G1 operates the device registration screen display button 11a of the in-vehicle device 1 (step S2).

As shown in the flowchart FA of FIG. 4, when it is detected that the device registration screen display button 11a has been operated, the vehicle-mounted device control unit 10 displays the device registration start screen G2 on the vehicle-mounted device touch panel 13 (step SA1). ..

FIG. 6 is a diagram showing a device registration start screen G2.
As shown in FIG. 6, the device registration start screen G2 has a touch-operable start button 13a. Further, on the device registration start screen G2, information indicating that pairing (registration of the mobile terminal 3 in the in-vehicle device 1) is started when the start button 13a is touch-operated, and a predetermined period (in this example). , 30 seconds.), Information indicating that sound is output from the in-vehicle device 1 and information indicating that the user should be quiet until the sound output is stopped are displayed.
The user should operate the start button 13a to start pairing by referring to the device registration start screen G2, and the sound is output for a predetermined period according to the operation of the start button 13a. , You can accurately recognize that you should wait quietly until the sound output stops.

When the user who has referred to the device registration start screen G2 starts pairing, he / she operates the start button 13a on the screen (step S3).

When it is detected that the start button 13a has been operated, the setting sound generation unit 10a of the vehicle-mounted device control unit 10 executes the setting sound generation process (step SA2). Hereinafter, the setting sound generation process will be described in detail.

The flowchart FC of FIG. 7 is a flowchart showing the details of the set sound generation process.
As shown in the flowchart FC of FIG. 7, in the set sound generation process, the set sound generation unit 10a acquires the master side communication information stored in the master side communication information storage unit 142 (step SC1). As described above, the master-side communication information includes the in-vehicle device identification information used for pairing and the password information.

Next, the vehicle-mounted device control unit 10 encrypts each of the vehicle-mounted device identification information and the password information acquired in step SC1 with a pre-registered encryption key (step SC2). The encryption key used by the vehicle-mounted device control unit 10 in step SC2 corresponds to the decryption key registered in the mobile terminal 3, and the data encrypted by the encryption key related to the vehicle-mounted device 1 is stored in the mobile terminal 3. It can be decrypted with the decryption key.
Hereinafter, the encrypted in-vehicle device identification information is referred to as "encrypted identification information", and the encrypted password information is referred to as "encrypted password information".
Here, the encrypted identification information will be described in more detail.

FIG. 8 is a diagram used for explaining the encrypted identification information. Note that FIG. 8 is also used for the following description of the set sound generation process.
It is assumed that the in-vehicle device identification information before encryption in step SC2 is the character string "123abc". In this embodiment, the "character" is a character represented by an ASCII code. Therefore, each of the characters constituting the character string of the vehicle-mounted device identification information is represented by an 8-bit ASCII code, and the character string of the vehicle-mounted device identification information is represented by a bit string having a predetermined length composed of a combination of the ASCII codes. Hereinafter, the bit string representing the in-vehicle device identification information is referred to as an "identification information bit string" for convenience. FIG. 8 shows an identification information bit string when the in-vehicle device identification information is the character string “123abc”.
In step SC2, the vehicle-mounted device control unit 10 encrypts the identification information bit string using the encryption key, and newly generates the bit string. The newly generated bit string corresponds to the encrypted identification information. Hereinafter, the bit string representing the encryption identification information is referred to as "encryption identification information bit string" for convenience. FIG. 8 shows an example of the encryption identification information bit string.

Next, the setting sound generation unit 10a divides the encryption identification information (encryption identification information bit string) generated in step SC2 into 4 bits in order from the beginning (step SC3). For example, assuming that the encryption identification information bit string generated in step SC2 is the encryption identification information bit string illustrated in FIG. 8, the setting sound generation unit 10a has the bit strings “1100” of the first to fourth bits, 5 The bits are divided into 4 bits in order from the beginning, such as the bit string "1000" of the 8th bit, the bit string "1110" of the 9th to 12th bits, and the bit string "0110" of the 13th to 16th bits. To do. Each of the divided 4-bit bit strings can be converted into a reference hexadecimal digit.

Next, the set sound generation unit 10a converts each of the divided 4-bit bit strings into a reference hexadecimal digit (step SC4). When the processing target of step SC4 is the encrypted identification information bit string illustrated in FIG. 8, the setting sound generation unit 10a converts the bit strings “1100” of the first to fourth bits into the reference hexadecimal digit “0xc”. The bit string "1000" of the 5th to 8th bits is converted to the reference hexadecimal digit "0x8", and the bit string "1110" of the 9th to 12th bits is converted to the reference hexadecimal digit "0xe" to 13 bits. The bit string "0110" of the 16th bit is converted into the reference hexadecimal digit "0x6".
Hereinafter, each of the divided 4-bit bit strings converted into a reference hexadecimal number is referred to as "post-conversion identification information". The converted identification information corresponds to information in which the encrypted identification information string is represented by a hexadecimal number.

Next, the setting sound generation unit 10a refers to the sound table 141a corresponding to the vehicle-mounted device side, and converts each of the reference hexadecimal numbers constituting the converted identification information into a sound name (step SC5). In step SC5, the setting sound generation unit 10a converts each of the reference hexadecimal numbers constituting the converted identification information into a sound name associated with the reference hexadecimal number in the in-vehicle device side corresponding sound table 141a. When the processing target of step SC5 is the converted identification information illustrated in FIG. 8, the setting sound generation unit 10a converts the reference hexadecimal digit “0xc” into the note name “medium A” and converts the reference hexadecimal digit “0xc” into the note name “medium A”, and the reference hexadecimal digit “0x8”. Is converted to the note name "middle D", the reference hexadecimal digit "0xe" is converted to the note name "high C", and the reference hexadecimal digit "0x6" is converted to the note name "low B".
Hereinafter, the conversion of each reference hexadecimal number of the converted identification information into a note name is referred to as "note name identification information".

Next, the setting sound generation unit 10a executes the processes of steps SC6 to SC8. Since the processes of steps SC6 to SC8 are the same as the processes of steps SC3 to SC5, they will be briefly described.
In step SC6, the setting sound generation unit 10a divides the bit string of the encrypted password information into 4 bits in order from the beginning.
In step SC7, the setting sound generation unit 10a converts each of the divided 4-bit bit strings into reference hexadecimal digits.
In step SC8, the setting sound generation unit 10a refers to the sound table 141a corresponding to the vehicle-mounted device side, and converts each of the reference hexadecimal numbers converted in step SC7 into a sound name.
Hereinafter, in step SC8, the reference hexadecimal number converted into a note name is referred to as "note name password information".

Next, the set sound generation unit 10a generates set sound information that combines the set sound start information, the sound name identification information, the delimiter information, the sound name password information, and the set sound end information (step SC9).
The set note start information is information consisting of one or more note names that are not assigned to the reference hexadecimal number among the note names, and is a combination of note names different from both the delimiter information and the set note end information ( For convenience, one note name is also expressed as "combination of note names").
The delimiter information is information consisting of one or more note names that are not assigned to the reference hexadecimal number among the note names, and is a combination of note names different from both the set note start information and the set note end information. Information.
The set note end information is information consisting of one or more note names that are not assigned to the reference hexadecimal number among the note names, and is a combination of note names different from both the set note start information and the delimiter information. Information.
For example, the set sound start information is information consisting of the note name "high E", the delimiter information is information consisting of the note name "high F", and the set sound end information is information consisting of the note name "high G". ..
The set sound information is combined in the order of set sound start information → note name identification information → delimiter information → sound name password information → set sound end information.

Next, the set sound generation unit 10a acquires the number of sound names constituting the set sound information (step SC10). The number of note names that make up the set note information is the number of note names that make up the set note start information, the number of note names that make up the note name identification information, the number of note names that make up the delimiter information, and the sounds. It is the total of the number of note names that make up the name password information and the number of note names that make up the set note end information.
Next, the set sound generation unit 10a acquires the guide voice time length (step SC11). The guide voice time length is the time required from the start of voice output to the end of voice output when the guide voice (described later) is voice output based on the guide voice file stored in the guide voice storage unit 143. It is the length of time excluding a predetermined margin from the length. The guide voice time length is registered in advance.

Next, the set sound generation unit 10a divides the guide voice time length acquired in step SC11 by the number of note names constituting the set sound information acquired in step SC10, and the value calculated by the division (hereinafter, """Single note time length") is acquired. (Step SC12).
Next, the set sound generation unit 10a generates a set sound sound file based on the set sound information generated in step SC9 and the single sound time length acquired in step SC12 (step SC13). Hereinafter, the process of step SC13 will be described in detail.

The setting sound audio file is an audio file of "a continuous sound in which each sound corresponding to a sound name constituting the setting sound information has a single sound length in order" (hereinafter referred to as "setting sound"). .. For example, when the set sound information is information composed of a combination of the sound name "low C", the sound name "low D", and the sound name "low E", the set sound is the following sound. That is, the set sound corresponds to the sound corresponding to the note name "low C" having a single note time length, the sound corresponding to the note name "low D" having a single note time length, and the note name "low E" having a single note time length. The sound to be played is a continuous sound in this order.
Further, in the present embodiment, the tone color of the set sound is a piano sound. By using the set sound as the piano sound, the synthetic sound (described later) in which the guide sound and the set sound are combined becomes a state in which the piano sound is played in the background of the human voice, and the user who listens to the synthetic sound feels uncomfortable. Can be suppressed from holding. The sound of the set sound is not limited to the piano sound, but may be a buzzer sound, a chime sound, an electronic sound such as a synthesizer, or a human voice, and the user can set which sound the set sound should be. The configuration may be.
Here, the in-vehicle device 1 is based on information composed of a combination of note names (corresponding to set sound information) and information indicating the time length of the sound corresponding to each sound name (corresponding to a single sound time length). Therefore, a module having a function of generating and outputting an audio file of audio in which sounds corresponding to each note name are sequentially continuous for a long time is implemented. In step SC13, the setting sound generation unit 10a generates a setting sound audio file by the function of the module.
After the process of step SC13, the set sound generation unit 10a ends the set sound generation process.

As shown in the flowchart FA of FIG. 4, after the set sound generation process by the set sound generation unit 10a is completed, the vehicle-mounted device control unit 10 executes the voice output of the synthesized sound (step SA3). Hereinafter, the process of step SA3 will be described in detail.
The synthetic sound is a voice in which the guide voice and the set sound are combined. The guide voice is a voice that notifies that the processing related to pairing is being executed. In the present embodiment, the guide voice is a voice that outputs the phrase "currently performing pairing. Please wait." By a human voice. The guide voice may be a voice that allows the user to recognize that the in-vehicle device 1 and the mobile terminal 3 are executing the processing related to pairing. By having the user listen to the guide voice, it is possible to make the user recognize that the in-vehicle device 1 and the mobile terminal 3 are executing the processing related to pairing. As a result, for example, the user may stop the activation of the dedicated application AP on the mobile terminal 3 or turn off the power of the in-vehicle device 1 while the synthetic sound is being output, which may cause a pairing failure. It is possible to suppress various operations.

In step SA3, the in-vehicle device control unit 10 parallelly transmits a voice signal based on the guide voice file stored by the guide voice storage unit 143 and a voice signal based on the set sound voice file generated by the set sound generation unit 10a. By outputting to the voice output unit 17, a synthetic sound in which the guide sound and the set sound are combined is output as voice.
At that time, the in-vehicle device control unit 10 outputs the voice signal based on the set sound voice file with respect to the timing of starting the output of the voice signal based on the guide voice file so that the guide sound includes the set sound. Adjust the timing to start. The state in which the set sound is included in the guide sound means that the timing at which the audio output of the set sound is started comes after the timing at which the audio output of the guide sound is started, and the timing at which the audio output of the set sound ends. This means that the timing for ending the audio output of the guide sound will come later. The in-vehicle device control unit 10 outputs the audio signal based on the set sound audio file with respect to the timing when the output of the audio signal based on the guide audio file is started based on the relationship between the guide audio time length and the set sound time length. Adjust the timing to start. The time length of the set sound is the length of time required from the start of the audio output to the end of the audio output when the set sound is output as audio based on the set sound audio file.
The unit time length of the note names constituting the set sound may be set so that the guide voice time length is the same as the time length of the set sound. In this case, when the guide sound includes the set sound, the timing at which the audio output of the set sound is started comes at the timing when the audio output of the guide sound is started, and the audio output of the set sound ends. The timing for ending the audio output of the guide sound comes at the timing when the guide sound is output.

After the voice output of the synthetic sound is completed, the vehicle-mounted device control unit 10 determines whether or not the voice output of the synthetic sound has been performed "three times" (step SA4).
When the voice output of the synthetic sound is not performed "three times" (step SA4: NO), the in-vehicle device control unit 10 returns the processing procedure to step SA3 and executes the voice output of the synthetic sound.
On the other hand, when the voice output of the synthesized sound is performed "three times" (step SA4: YES), the in-vehicle device control unit 10 shifts the processing procedure to step SA5.
As described above, in the present embodiment, the in-vehicle device control unit 10 continuously and repeatedly executes the voice output of the synthesized sound "three times". Further, each synthetic sound is a voice in which one setting sound is combined with one guide voice.

In step SA5, the vehicle-mounted device control unit 10 controls the vehicle-mounted device wireless communication unit 15 to monitor whether or not a search signal has been received from the mobile terminal 3. The search signal will be described later.

As shown in the flowchart FB of FIG. 4, after starting the recording of the sound around the mobile terminal 3 in step SB2, the guide voice detection unit 301 of the mobile terminal control unit 30 executes the following processing (step SB3). .. That is, the guide voice detection unit 301 analyzes the recorded data cumulatively stored in the mobile terminal storage unit 33 at any time, and the voice recorded in the recorded data includes the guide voice for "three times". Monitor whether or not it has become. For example, the guide voice detection unit 301 executes the process of step SB3 by the following method. That is, information indicating the feature points of the voice waveform of the guide voice is registered in the dedicated application AP. The mobile terminal control unit 30 analyzes the voice waveform of the voice recorded in the recorded data, and by pattern matching with the feature points of the voice waveform of the guide voice, whether or not the voice recorded in the recorded data includes the guide voice. Monitor it from time to time. Then, when the mobile terminal control unit 30 detects that the voice recorded in the recorded data includes the guide voice for "three times", the voice recorded in the recorded data in step SB3. It is determined that the guide voice for "3 times" is included in. The method for determining whether or not the voice recorded in the recorded data includes the guide voice is not limited to the method illustrated above, and may be any method using existing technology.

When it is determined in step SB3 that the voice recorded in the recorded data does not include the guide voice for "three times" (step SB3: NO), the guide voice detection unit 301 steps the processing procedure. Returning to SB3, it is determined whether or not the voice recorded in the recorded data includes the guide voice for "three times".
In step SB3, when it is determined that the voice recorded in the recorded data includes the guide voice for "three times" (step SB3: YES), the guide voice detection unit 301 determines from the recorded data that the guide voice is "3 times". Data corresponding to the guide voice for "three times" (hereinafter, referred to as "synthetic sound data") is extracted (step SB4). The synthetic sound data is voice data generated by recording a voice including a synthetic sound (a voice in which a guide sound and a set sound are combined) that the vehicle-mounted device 1 continuously outputs the voice "three times". The voice recorded in the synthetic sound data may include environmental sounds in addition to the synthetic sounds.
Next, the guide voice detection unit 301 uses the extracted synthetic sound data as data corresponding to the first guide voice (hereinafter referred to as “first synthetic sound data”) and data corresponding to the second guide voice (hereinafter referred to as “first synthetic sound data”). Hereinafter, it is divided into three data, that is, "second synthetic sound data") and data corresponding to the third guide voice (hereinafter, referred to as "third synthetic sound data"), and each data is divided into three data. Output to the sound source separation unit 302 (step SB5).

Here, the first synthetic sound data, the second synthetic sound data, and the third synthetic sound data are each voice data in which the voice corresponding to one set sound information is recorded. As described above, at the time of pairing, the in-vehicle device 1 outputs a synthetic sound obtained by synthesizing the guide sound and the set sound "three times". The guide voice and the set sound have a one-to-one relationship, and one guide sound includes one set sound. The setting sound extraction unit 303 preferably utilizes the fact that the guide sound and the set sound have a one-to-one relationship and the guide sound includes the set sound, and the first synthetic sound data and the second The synthetic sound data and the third synthetic sound data can be divided in a state in which the sound corresponding to one set sound information is recorded. As a result, the following processing using the first synthetic sound data, the second synthetic sound data, and the third synthetic sound data is performed, and the voice corresponding to one set sound information is recorded in each of these data. It can be done accurately while the fact is guaranteed.

Next, the sound source separation unit 302 of the mobile terminal control unit 30 executes the following processing (step SB6). That is, in step SB6, the sound source separation unit 302 extracts the sound component of the guide voice from the voice recorded in the first synthetic sound data based on the first synthetic sound data, thereby and the sound component of the guide voice. It is separated into the sound components of the sound excluding the guide sound (hereinafter referred to as "first separated sound"). Next, the sound source separation unit 302 generates audio data in which the first separated sound is recorded (hereinafter, referred to as “first separated sound audio data”) based on the sound component of the separated first separated sound. The sound source separation unit 302 extracts the sound component of the guide voice from the voice recorded in the first synthetic sound data by using, for example, a blind sound source separation process.
Similarly, in step SB6, the sound source separation unit 302 uses the sound recorded in the second synthetic sound data as the sound component of the guide sound and the sound excluding the guide sound (hereinafter, referred to as “second separated sound”). Separate into sound components. Next, the sound source separation unit 302 generates audio data in which the second separated sound is recorded (hereinafter, referred to as “second separated sound audio data”) based on the sound component of the separated second separated sound.
Similarly, in step SB6, the sound source separation unit 302 uses the sound recorded in the third synthetic sound data as the sound component of the guide sound and the sound excluding the guide sound (hereinafter, referred to as “third separated sound”). Separate into the sound components of. Next, the sound source separation unit 302 generates audio data in which the third separated sound is recorded (hereinafter, referred to as “third separated sound audio data”) based on the sound component of the separated third separated sound.
The first separated sound, the second separated sound, and the third separated sound are sounds including the set sound, respectively. Hereinafter, when the first separated sound, the second separated sound, and the third separated sound are not distinguished, they are expressed as "separated sound".
In step SB6, the sound source separation unit 302 outputs each of the first separated sound voice data, the second separated sound voice data, and the third separated sound voice data to the set sound extraction unit 303.

Next, the setting sound extraction unit 303 of the mobile terminal control unit 30 executes the following processing (step SB7). That is, in step SB7, the set sound extraction unit 303 separates the sound component of the set sound (hereinafter, referred to as “first set sound”) from the sound recorded in the first separated sound sound data. Next, the set sound extraction unit 303 generates voice data in which the first set sound is recorded (hereinafter, referred to as “first set sound voice data”) based on the separated sound components of the first set sound. The set sound extraction unit 303 separates the sound component of the first set sound from the sound recorded in the first separated sound sound data by, for example, a filtering process using a comb-side filter.
Similarly, in step SB7, the set sound extraction unit 303 separates the sound component of the set sound (hereinafter, referred to as “second set sound”) from the sound recorded in the second separated sound sound data. Next, the set sound extraction unit 303 generates voice data in which the second set sound is recorded (hereinafter, referred to as “second set sound voice data”) based on the separated sound components of the second set sound.
Similarly, in step SB7, the set sound extraction unit 303 separates the sound component of the set sound (hereinafter, referred to as “third set sound”) from the sound recorded in the third separated sound sound data. Next, the set sound extraction unit 303 generates voice data in which the third set sound is recorded (hereinafter, referred to as “third set sound voice data”) based on the separated sound components of the third set sound.
In step SB7, the set sound extraction unit 303 outputs each of the first set sound voice data, the second set sound voice data, and the third set sound voice data to the text conversion unit 304.

Next, the text conversion unit 304 of the mobile terminal control unit 30 executes the text conversion process (step SB8). Hereinafter, the text conversion process in step SB8 will be described in detail.

The flowchart FD of FIG. 9 is a flowchart showing the details of the text conversion process.
Here, regarding the set sound start information, the delimiter information, and the set sound end information included in the above-mentioned set sound information, the sound name constituting the set sound start information, the sound name constituting the delimiter information, and the set sound end The note names that make up the information are registered in the dedicated application AP. Further, when the set sound start information is output as voice, information indicating the feature points of the voice waveform of the sound component of the information is registered in the dedicated application AP. Similarly, information indicating the characteristic points of the audio waveform of the sound component of the delimiter information and information indicating the characteristic points of the audio waveform of the sound component of the set sound end information are registered in the dedicated application AP.

As shown in the flowchart FD of FIG. 9, the text conversion unit 304 calculates the single note time length (step SD1). For example, the text conversion unit 304 calculates the single note time length by the following method. That is, the text conversion unit 304 sets the sound components of the voice recorded in the first set sound voice data based on the feature points of the voice waveform of the sound component of the set sound start information registered in the dedicated application AP. Identify the sound component of the voice corresponding to the sound start information. Next, the text conversion unit 304 acquires the time length of the voice corresponding to the sound component of the set sound start information. Next, the text conversion unit 304 calculates the single note time length by dividing the time length of the voice corresponding to the sound component of the set sound start information by the number of note names constituting the set sound start information. The method for calculating the single note time length is not limited to the illustrated method. For example, the set sound information may include a single note time length.

Next, the text conversion unit 304 acquires the first set sound / voice data (step SD2).
Next, the text conversion unit 304 analyzes the first set sound voice data and identifies the sound component of the voice corresponding to the sound name identification information among the sound components of the voice recorded in the first set sound voice data ( Step SD3). As described above, in the set sound information, the note name identification information is located between the set sound start information and the delimiter information. Based on this, in step SD3, the text conversion unit 304 sets the sound component included in the region between the sound component corresponding to the voice of the set sound start information and the sound component corresponding to the voice of the delimiter information as a sound name. It is specified as a sound component of voice corresponding to the identification information.

Next, the text conversion unit 304 analyzes the sound component data related to the sound name identification information (hereinafter, referred to as "first sound name identification information voice data") among the first set sound voice data, and identifies the sound name. Generate information (step SD4). Hereinafter, the note name identification information generated based on the first note name identification information voice data is referred to as "first note name identification information".

FIG. 10 is a diagram used for explaining the process of step SD4. FIG. 10 shows the first note name identification information when the note name identification information consists of the note name “low C”, the note name “low C”, the note name “low D”, and the note name “low E”. The relationship between the passage of time when the voice is output based on the voice data and the transition of the frequency is schematically shown in a mode suitable for explanation.
Here, for each of the note names, information indicating the frequency of the sound corresponding to the note name is registered in advance in the dedicated application AP.
In step SD4, when the text conversion unit 304 analyzes the first sound name identification information voice data and outputs the voice based on the first sound name identification information voice data, the step starts from the start timing of the voice based on the data. Starting from the timing (timing T1 in the example of FIG. 10) shifted by "1/2" of the single note time length acquired in SD1, the timing with the single note time length as the cycle (timing T2 in the example of FIG. 10). The frequency of the voice in T3, T4.) Is acquired. In the example of FIG. 10, the text conversion unit 304 analyzes the first note name identification information voice data, and at each of the timings T1 to T4, the voice that is output based on the first note name identification information voice data. Get the frequency.
Next, the text conversion unit 304 identifies the note name of the voice output at each timing based on the frequency of the voice at each acquired timing. Next, the text conversion unit 304 generates the first note name identification information by combining the specified note names in the order of voice output.

Next, the text conversion unit 304 refers to the mobile terminal side compatible sound table 331a stored in the mobile terminal side compatible sound information storage unit 331 of the mobile terminal storage unit 33, and obtains the first sound name identification information generated in step SD4. After conversion, it is converted into identification information (step SD5). Hereinafter, the converted identification information generated by converting the first note name identification information is referred to as "first converted identification information".
In step SD5, the text conversion unit 304 converts each of the note names constituting the first note name identification information into a reference hexadecimal number based on the mobile terminal side compatible sound table 331a, thereby converting the first note name. The identification information is converted into the identification information after the first conversion.

Next, the text conversion unit 304 generates an encrypted identification information bit string by converting the first converted identification information composed of a combination of reference hexadecimal numbers into a bit string (step SD6). Hereinafter, the encrypted identification information generated based on the first converted identification information is referred to as "first encrypted identification information". As described above, the encryption identification information bit string is information obtained by encrypting the in-vehicle device identification information with the encryption key registered in the in-vehicle device 1.

Next, the text conversion unit 304 generates the identification information bit string by decrypting the first encryption identification information bit string generated in step SD6 with the decryption key (step SD7). Hereinafter, the identification information bit string generated by decrypting the first encryption identification information bit string with the decryption key is referred to as a "first identification information bit string".

Here, the decryption key is registered in the dedicated application AP. Then, the registration of the decryption key in the dedicated application AP is performed by a predetermined server. When registering the decryption key in the dedicated application AP, the predetermined server properly authenticates the user and is in-vehicle only when accessed by a person with legitimate authority such as the purchaser of the in-vehicle device 1. The decryption key corresponding to the encryption key registered in the device 1 is registered in the dedicated application AP. For example, when registering the decryption key in the dedicated application AP, the predetermined server requests the in-vehicle device identification information of the in-vehicle device 1 and a password that can be obtained only by a person having a legitimate authority to identify the in-vehicle device. Authentication is performed using the information and password, and the decryption key is registered in the dedicated application AP only when the authentication is successful.
In this way, the decryption key corresponding to the encryption key registered in the in-vehicle device 1 is registered in the dedicated application AP only when the owner of the mobile terminal 3 has a legitimate authority. .. Therefore, the compounding using the decryption key in step SD7 can be normally executed only when the owner of the mobile terminal 3 has a legitimate authority.

Next, the text conversion unit 304 generates in-vehicle device identification information by converting the first identification information bit string generated in step SD7 into a character string composed of a combination of characters of the ASCII code (step SD8). Hereinafter, the in-vehicle device identification information generated based on the first identification information bit string is referred to as "first in-vehicle device identification information".

Next, the text conversion unit 304 generates password information based on the first set sound voice data acquired in step SD2 (step SD9). Hereinafter, the password information generated based on the first set sound voice data is referred to as "first password information". The method of the process of generating the first password information based on the first set sound voice data is the process of generating the first in-vehicle device identification information based on the first set sound voice data (processes of steps SD3 to SD8). Since it is the same as the method of (1), the description thereof will be omitted.

Next, the text conversion unit 304 acquires the second set sound voice data, and generates the vehicle-mounted device identification information and the password information based on the acquired second set sound voice data (step SD10). Hereinafter, the in-vehicle device identification information generated based on the second set sound voice data is referred to as "second in-vehicle device identification information", and the password information generated based on the second set sound voice data is referred to as "second It is called "password information".
The processing method for generating the second in-vehicle device identification information and the second password information based on the second set sound voice data is the first in-vehicle device identification information and the first in-vehicle device identification information based on the first set sound voice data. Since it is the same as the method of the process of generating the password information (the process of steps SD3 to SD9), the description thereof will be omitted.

Next, the text conversion unit 304 acquires the third set sound voice data, and generates the vehicle-mounted device identification information and the password information based on the acquired third set sound voice data (step SD11). Hereinafter, the in-vehicle device identification information generated based on the third set sound voice data is referred to as "third in-vehicle device identification information", and the password information generated based on the third set sound voice data is referred to as "third It is called "password information".
The processing method for generating the third in-vehicle device identification information and the third password information based on the third set sound voice data is the first in-vehicle device identification information and the first in-vehicle device identification information based on the first set sound voice data. Since it is the same as the method of the process of generating the password information (the process of steps SD3 to SD9), the description thereof will be omitted.

Next, the text conversion unit 304 executes the vehicle-mounted device identification information verification process based on the first vehicle-mounted device identification information, the second vehicle-mounted device identification information, and the third vehicle-mounted device identification information (step SD12).
In the in-vehicle device identification information verification process of step SD12, when the values of the first in-vehicle device identification information, the second in-vehicle device identification information, and the third in-vehicle device identification information match each other, the text conversion unit 304 matches. The value of this information is specified as the value of the vehicle-mounted device identification information. This is because when the values of these information match, it can be said with high accuracy that the values of these information are the actual in-vehicle device identification information.

On the other hand, in the in-vehicle device identification information verification process of step SD12, the text conversion unit 304 does not match the values of the first in-vehicle device identification information, the second in-vehicle device identification information, and the third in-vehicle device identification information. In this case, the corresponding process is executed without specifying the value of the in-vehicle device identification information. The corresponding process is, for example, a process of displaying information indicating that the acquisition of the in-vehicle device identification information was not successful on the mobile terminal touch panel 31. As a result, it is possible to encourage the user to operate the in-vehicle device 1 and to output the synthesized sound from the in-vehicle device 1 again.
Here, the first vehicle-mounted device identification information, the second vehicle-mounted device identification information, and the third vehicle-mounted device identification information are each generated based on the synthetic sound output by the vehicle-mounted device 1. Therefore, the value of this information may differ from the value of the actual in-vehicle device identification information due to the mixing of environmental sounds, the influence of noise, and other factors. The vehicle-mounted device identification information verification process in step SD12 is executed based on such a case.
In the in-vehicle device identification information verification process, when the text conversion unit 304 matches the values of two of the first in-vehicle device identification information, the second in-vehicle device identification information, and the third in-vehicle device identification information. May be configured to specify the values of the two pieces of information as the values of the in-vehicle device identification information. Further, in the in-vehicle device identification information verification process, the text conversion unit 304 corrects a predetermined error by using the first in-vehicle device identification information, the second in-vehicle device identification information, and the third in-vehicle device identification information. A value that reflects a predetermined error correction may be specified as a value of the in-vehicle device identification information. The same applies to the password information verification process in step SD13, which will be described later.

Next, the text conversion unit 304 executes the password information verification process based on the first password information, the second password information, and the third password information (step SD13).
In the password information verification process of step SD13, when the values of the first password information, the second password information, and the third password information match each other, the text conversion unit 304 sets the values of these information as the password information. Identify as. On the other hand, in the password information verification process of step SD13, the text conversion unit 304 specifies the value of the password information when the values of the first password information, the second password information, and the third password information do not match each other. Do not execute the corresponding process. The corresponding process is, for example, the process exemplified in the in-vehicle device identification information verification process. The password information verification process is executed for the same purpose as the in-vehicle device identification information verification process.

After the process of step SD13, the text conversion unit 304 ends the text conversion process.
In the following description, it is assumed that the vehicle-mounted device identification information is specified in step SD12 and the password information is specified in step SD13.

As shown in the flowchart FB of FIG. 4, after the text conversion process by the text conversion unit 304 in step SB8 is completed, the mobile terminal control unit 30 searches for and accesses a master accessible by wireless communication according to the Bluetooth standard. Acquire possible master identification information (step SB9). In the present embodiment, the in-vehicle device 1 and the mobile terminal 3 are sufficiently close to each other, and in the process of step SB10, the mobile terminal control unit 30 searches for the in-vehicle device 1 as a master and identifies the in-vehicle device. To get.

Next, the mobile terminal control unit 30 determines a device with identification information having the same value as the value of the in-vehicle device identification information specified by the text conversion unit 304 as a target for pairing, and controls the mobile terminal wireless communication unit 34. Then, the search signal is transmitted according to the Bluetooth standard (step SB10). The device of the identification information having the same value as the value of the vehicle-mounted device identification information specified by the text conversion unit 304 corresponds to the vehicle-mounted device 1.

As shown in the flowchart FA of FIG. 4, in step SA5, the vehicle-mounted device control unit 10 controls the vehicle-mounted device wireless communication unit 15 to monitor whether or not a search signal is received from the mobile terminal 3.
When the search signal is not received from the mobile terminal 3 (step SA5: NO), the in-vehicle device control unit 10 returns the processing procedure to step SA5 and monitors whether or not the search signal is received from the mobile terminal 3.
When the search signal is received from the mobile terminal 3 (step SA5: YES), the in-vehicle device control unit 10 establishes a wireless communication link with the mobile terminal 3 from which the search signal is transmitted according to the Bluetooth standard (step SA6).
Next, the in-vehicle device control unit 10 and the mobile terminal control unit 30 transmit and receive information necessary for pairing via the wireless communication link established between the in-vehicle device 1 and the mobile terminal 3, and comply with the Bluetooth standard. , Perform pairing (step SA7, step SB11). The information transmitted by the mobile terminal control unit 30 at the time of pairing includes at least the password information specified by the text conversion unit 304. The in-vehicle device control unit 10 authenticates the mobile terminal 3 based on the password information.

As described above, in the present embodiment, when pairing the in-vehicle device 1 with the mobile terminal 3, the user examines the in-vehicle device identification information of the in-vehicle device 1 and then displays the identifications listed on the mobile terminal 3. It is not necessary to select the identification information corresponding to the vehicle-mounted device identification information of the vehicle-mounted device 1 from the information, or to input the password information to the mobile terminal 3. Therefore, the convenience of the user is improved.

As described above, the wireless communication system 100 according to the present embodiment includes an in-vehicle device 1 (first wireless communication device) and a mobile terminal 3 (second wireless communication device). The in-vehicle device 1 has a guide voice storage unit 143 that stores the guide voice, and a setting sound generation unit that generates a setting sound having a time length equal to or less than the time length of the guide voice based on a character string representing information related to wireless communication. It has 10a and a voice output unit 17 (output unit) that outputs a synthesized sound obtained by synthesizing a guide sound and a set sound. The mobile terminal 3 includes a voice sound collecting unit 32 that collects the synthetic sound output from the sound output unit 17 of the in-vehicle device 1, a guide sound detecting unit 301 that detects the guide sound from the synthetic sound, and a guide sound detecting unit 301. Based on the guide sound detected by, the sound source separation unit 302 that separates the guide sound and the separated sound from the synthetic sound, the setting sound extraction unit 303 that extracts the set sound from the separated sound, and the set sound is converted into a character string. It has a text conversion unit 304 and.
According to this configuration, when a state in which wireless communication is possible is not established between the in-vehicle device 1 and the mobile terminal 3, the user performs work such as inputting information related to wireless communication to the mobile terminal 3. It is possible to have the mobile terminal 3 acquire information on wireless communication without having to do so. Therefore, the workload of the user is reduced and the convenience of the user is improved.

Further, in the present embodiment, the set sound information (character string) corresponding to the set sound includes the vehicle-mounted device identification information (device identification information) that identifies the vehicle-mounted device 1.
According to this configuration, the mobile terminal 3 can acquire the in-vehicle device identification information without performing complicated work before the wireless communication is established between the in-vehicle device 1 and the mobile terminal 3. This improves user convenience.

Further, in the present embodiment, the set sound information corresponding to the set sound includes the password information used for causing the in-vehicle device 1 to authenticate the mobile terminal 3.
According to this configuration, before the wireless communication is established between the in-vehicle device 1 and the mobile terminal 3, the user can have the mobile terminal 3 acquire the password information without performing complicated work. , User convenience is improved.

Further, in the present embodiment, the setting sound generation unit 10a encrypts the device identification information (character string) and the password information (character string), and generates the setting sound based on the encrypted information.
According to this configuration, only the device capable of decrypting the encrypted information can normally acquire the device identification information and the password information, so that information leakage can be suppressed.

Further, according to the present embodiment, the tone color of the set sound is a piano sound.
According to this configuration, the piano sound is played in the background of the guide voice for the synthetic sound, and it is possible to suppress the user who listens to the synthetic sound from feeling uncomfortable.

The above-described embodiment merely illustrates one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

For example, in the present embodiment, the case where the in-vehicle device 1 and the mobile terminal 3 communicate with each other according to the Bluetooth standard has been described as an example. However, the communication standard used for communication between the in-vehicle device 1 and the mobile terminal 3 is not limited to Bluetooth. For example, the communication standard may be Wi-Fi®.

In the present embodiment, the in-vehicle device 1 of the wireless communication system 100 encrypts the in-vehicle device identification information and the password information and then converts them into a set sound, and the mobile terminal 3 decodes the character string acquired from the set sound. However, the vehicle-mounted device 1 may be configured to convert the vehicle-mounted device identification information and the password information into a set sound without encrypting the information. In this case, the mobile terminal 3 determines the in-vehicle device identification information and the password information from the set sound without performing the decoding process, and executes the pairing-related process based on the in-vehicle device identification information and the password information.

Further, in the present embodiment, the wireless communication device is exemplified as the in-vehicle device 1 and the mobile terminal 3, but the form of the wireless communication device is arbitrary. For example, it may be a wireless communication system 100 using a mobile terminal 3 and another mobile terminal. That is, the present invention can be applied to a wireless communication device having a wireless communication function and a wireless communication system capable of wireless communication between wireless communication devices having a wireless communication function.

Further, in the present embodiment, the character string is a combination of characters of the ASCII code, but the character code is not limited to the ASCII code.

Further, the guide voice is not limited to the one illustrated in the present embodiment, and may be any one that the user can hear and recognize.

The in-vehicle device 1 outputs the synthetic sound "three times", but the number of times the synthetic sound is output is not limited to three times.

Further, for example, when the above-mentioned wireless communication method is realized by using the computer provided in the in-vehicle device 1 and the mobile terminal 3, the present invention is a program executed by the computer in order to realize the above-mentioned control method. It can also be configured in the form of a recording medium readable by the computer or a transmission medium for transmitting this program. As the recording medium, a magnetic or optical recording medium or a semiconductor memory device can be used. Specifically, flexible disks, HDDs (Hard Disk Drives), CD-ROMs (Compact Disk Read Only Memory), DVDs (Digital Versatile Disks), Blu-ray (registered trademarks) Discs, magneto-optical disks, flash memories, cards. Examples include portable or fixed recording media such as type recording media. Further, the recording medium may be a non-volatile storage device such as a ROM (Read Only Memory) or an HDD, which is an internal storage device included in the in-vehicle device 1 and the mobile terminal 3.

1 In-vehicle device (first wireless communication device)
3 Smartphone (second wireless communication device)
143 Guide voice storage unit 10a Setting sound generation unit 17 Voice output unit (output unit)
32 Voice sound pickup unit 301 Guide voice detection unit 302 Sound source separation unit 303 Set sound extraction unit 304 Text conversion unit

Claims (7)

In a wireless communication system including a first wireless communication device and a second wireless communication device capable of communicating with the first wireless communication device,
The first wireless communication device is
A guide voice storage unit that stores guide voice and
A setting sound generation unit that generates a setting sound having a time length equal to or less than the time length of the guide voice based on a character string representing information related to wireless communication.
It has an output unit that outputs a synthesized sound obtained by synthesizing the guide sound and the set sound.
The second wireless communication device is
A voice sound collecting unit that collects the synthetic sound output from the output unit, and
A guide voice detection unit that detects the guide sound from the synthetic sound collected by the voice sound collection unit, and
A sound source separation unit that separates the guide voice and the separated sound from the synthetic sound based on the guide voice detected by the guide voice detection unit.
A setting sound extraction unit that extracts the setting sound from the separated sound,
It has a text conversion unit that converts the set sound into the character string.
A wireless communication system characterized by this. The character string includes device identification information that identifies the first wireless communication device during wireless communication.
The wireless communication system according to claim 1. The character string includes password information used for causing the first wireless communication device to authenticate the second wireless communication device.
The wireless communication system according to claim 1 or 2. The setting sound generation unit encrypts the character string and generates the setting sound based on the encrypted character string.
The wireless communication system according to claim 1. The tone of the set sound is a piano sound.
The wireless communication system according to claim 1. A voice sound collecting unit that collects a synthetic sound generated based on a guide sound and a character string representing information related to wireless communication and having a time length equal to or less than that of the guide sound.
A guide voice detection unit that detects the guide sound included in the synthetic sound collected by the voice sound collection unit, and
A sound source separation unit that separates the guide voice and the separated sound from the synthetic sound based on the guide voice detected by the guide voice detection unit.
A setting sound extraction unit that extracts the setting sound from the separated sound,
A text conversion unit that converts the set sound into the character string,
A wireless communication device characterized by having. In the wireless communication method between the first wireless communication device and the second wireless communication device,
The first wireless communication device is
Memorize the guide voice,
Based on a character string representing information related to wireless communication, a set sound having a time length equal to or less than the time length of the stored guide voice is generated.
A synthetic sound obtained by synthesizing the guide sound and the set sound is output.
The second wireless communication device is
The synthetic sound is picked up and
The guide voice included in the collected synthetic sound is detected,
Based on the detected guide voice, the guide voice and the separated sound are separated from the synthetic sound.
The set sound is extracted from the separated sound,
A wireless communication method characterized in that the extracted set sound is converted into the character string.

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