JP6629111B2 - Route guidance device, route guidance method, and route guidance program - Google Patents

Description

  The present invention relates to, for example, a route guidance device realized by an electronic device such as a high-performance mobile phone terminal called a smartphone or a tablet PC (Personal Computer), a route guidance method used in the device, and a route guidance program.

  2. Description of the Related Art Conventionally, portable navigation devices that provide route guidance using map display and audio output have been used, and various improvements have been proposed. For example, Patent Literature 1 described later discloses an invention relating to a portable navigation device, in which a map displayed on a display is displayed in accordance with an orientation of the portable navigation device detected by an orientation sensor. Further, in Patent Document 1, if the direction of the destination and the direction of the portable navigation device match based on the detection value of the direction sensor provided in the portable navigation device, the volume of the guide sound is increased, and It is disclosed that if not, control to lower the volume of the guide sound is performed. Thereby, it is possible to easily recognize the azimuth through the displayed map, and it is also possible to confirm whether or not the vehicle is heading to the destination appropriately depending on the volume of the guidance sound.

JP 07-280582 A

  Generally, a portable navigation device is often used when a pedestrian moves on foot. Then, the pedestrian using the portable navigation device first searches for a route (route) from the current location (departure location) to the destination, and confirms the route on a map. Then, when the pedestrian specifies a landmark building or facility on the displayed map, it may be considered that the pedestrian may go to the destination without using a map display or voice guidance for route guidance. This is because the distance traveled on foot is relatively short, and unless the searched route is difficult to understand, it is often possible to reach the destination by following the landmarks.

However, even if you check on the map displayed on the portable navigation device, in places where there is no intuition of the land, due to misunderstanding etc., you may turn at the intersection where you should go straight, or you may not turn at the intersection where you should turn, It may deviate from the route. For this reason, it is sufficient to use the route guidance function of the portable navigation device until reaching the destination, but it is often troublesome to proceed while checking the map, and the time required to reach the destination is often May be longer. Rather, pedestrians feel better and more comfortable walking while listening to their favorite music.

  By using the technology described in Patent Document 1, it is possible to know whether the user is heading in the direction of the destination or in a direction different from the destination based on the volume level of the reproduced sound. However, in the case of the technology described in Patent Literature 1, it is only possible to determine whether or not the orientation of the portable navigation device is oriented toward the destination, but it is not possible to guide the pedestrian toward the destination. In other words, when the guidance sound is reduced, it is not known which direction the destination is, even if it is known that the direction of the portable navigation device is not directed to the destination.

  In view of the above, it is an object of the present invention to enable a user to be guided to a destination by an output mode of sound such as music to be reproduced.

In order to solve the above-mentioned problems, the route guidance device according to the first aspect of the present invention,
A receiving means for receiving an input of a destination;
Current position obtaining means for obtaining the current position of the own device;
Detecting means for detecting the traveling direction of the own aircraft;
Audio processing means for performing audio volume level adjustment processing for each channel on the audio signals of the left channel and the right channel to be output, and outputting audio through the left channel and the right channel;
The user should proceed based on the destination received through the reception unit, the current position acquired by the current position acquisition unit, the traveling direction detected by the detection unit, and map information. Direction specifying means for specifying a direction;
In accordance with the direction to be traveled specified by the direction specifying means, the audio processing means is controlled to perform a volume level adjustment process on an output audio signal, and one of the left channel and the right channel is controlled. Or, guidance processing means for performing route guidance according to a sound output mode corresponding to the sound volume level of the sound output from the left channel and the right channel, including the case where both sound volume levels become 0 (zero); With
The guidance processing means, when guiding the destination direction of the destination at the current position, the output mode of audio through both the left channel and the right channel,
When the destination direction is backward with respect to the traveling direction, the sound volume level is 0 (zero) in both channels,
When the destination direction is forward with respect to the traveling direction, a mode in which the volume level is output at the same volume level other than 0 (zero) in both channels,
When the destination direction is deviated left and right with respect to the traveling direction, depending on the angle between the traveling direction and the destination direction, including the case where the volume level of one channel becomes 0 (zero), By outputting at different volume levels in both channels,
The route guidance is performed.

  According to the present invention, the user can be guided to the destination by the output mode of the sound such as the reproduced music.

It is a block diagram for explaining the example of composition of the route guidance device of an embodiment. 3 is a flowchart for explaining a route guidance process using reproduced sound such as music performed in the route guidance device having the configuration shown in FIG. 1. FIG. 3 is a flowchart illustrating a route guidance process in a destination direction guidance mode performed in a process of step S108 illustrated in FIG. 2. FIG. 4 is a diagram for explaining an example of volume control in a destination direction guidance mode shown in FIG. 3. 3 is a flowchart for explaining a route guidance process in a detailed route guidance mode, which is executed in the process of step S108 shown in FIG. 2. It is a flowchart following FIG. FIG. 7 is a diagram for describing an example of volume control in the detailed route guidance mode shown in FIGS. 5 and 6.

  Hereinafter, an embodiment of an apparatus, a method, and a program according to the present invention will be described with reference to the drawings. The route guidance device of the present invention can be realized, for example, as a high-performance mobile phone terminal called a smartphone or the like, a tablet PC, or the like, and in these devices. However, in the following, for the sake of simplicity, a case in which the route guidance device according to the present invention is realized by an advanced mobile phone terminal will be described as an example.

[Configuration example of route guidance device]
FIG. 1 is a block diagram for describing a configuration example of a route guidance device 1 according to this embodiment. In the route guidance device shown in FIG. 1, the transmission / reception antenna 101A and the wireless communication unit 101 have a communication function, the control unit 102 has a function of controlling each part of the route guidance device, and the storage device 103 has, for example, a large-capacity semiconductor memory. And implements an information storage and holding function. The operation unit 104 is a part including a power on / off switch, a volume adjustment key, and some other function buttons provided at a predetermined position of the casing of the route guidance device 1.

  Each of the map DB 105 and the pedestrian NWDB 106 is formed, for example, in a large-capacity semiconductor memory, and stores and holds predetermined data. Here, the character “DB” in the map DB 105 is an abbreviation of a database (Data Base). The character “NWDB” in the pedestrian NWDB 106 is an abbreviation for a network database (Network Data Base).

  The map DB 105 stores, for example, map data for displaying a city map, a road map, a wide area map, a local map, and a national map. Map data for displaying a city map, a road map, a wide area map, a local map, and a nationwide map include, for example, vector data, raster data, and annotation (annotation) data for drawing a map. Also, various maps of various scales are prepared for city maps, road maps, wide area maps, local maps, and national maps.

  The pedestrian NWDB 106 stores and holds pedestrian network data including node data and link data. The node data represents points such as landmarks, buildings, facilities, intersections, junctions, and bends. The link data indicates a route that a pedestrian can walk by a line segment connecting the node data. Specifically, the link data indicates that pedestrians can pass, such as general roads that pedestrians can pass, sidewalks associated with various roads, pedestrian crossings, pedestrian bridges, and pedestrian paths that can pass through buildings and parks. 3 shows various roads (passages). Each link data is associated with information such as a node number of the link, a link cost, and a link type.

  The link cost represents a load on a user when the user travels on the road represented by the link. In this embodiment, the link cost is set according to the length of the road represented by the link. Note that the link cost may be set according to the time required to pass through the road represented by the link. Then, the link cost is referred to when searching for a route with the minimum link cost by the so-called Dijkstra method. The link type indicates a general road, a sidewalk associated with various roads, a pedestrian crossing, a pedestrian bridge, a pedestrian passage that can pass through a building or a park, and the like.

  The sensor unit 107 includes various sensors such as a six-axis sensor and a geomagnetic sensor (direction sensor). The sensor unit 107 can detect various states of the route guidance device 1. Specifically, the inclination and the direction of the route guidance device 1 are known. With this, the posture of the route guidance device 1 such as vertical or horizontal orientation, and the vertical (longitudinal direction), the horizontal direction (direction intersecting the vertical direction), or the direction orthogonal to the display screen in that posture. Can detect which direction it is facing.

  The wireless LAN (Local Area Network) unit 108 and the wireless LAN antenna 108A correspond to, for example, a Wi-Fi (registered trademark) standard wireless LAN, and realize a function of performing communication through a nearby wireless LAN access point. . In addition, in a predetermined management server device provided on the Internet, the identification ID and the installation position of each access point are managed.

  Therefore, at the current position, the identification IDs of the received access points and the received electric field strengths are transmitted to the management server device, whereby the current position of the route guidance device 1 is specified in the management server device. You can receive notification of your current location. In addition, if the route guidance device 1 includes a database including the identification ID of each access point managed by the management server and the installation position, the identification information and the received electric field strength of the communication access point are used. The current position of the own device can also be specified in the own device.

  The GPS unit 109 and the GPS antenna 109A implement a current position acquisition function of receiving signals from a plurality of artificial satellites and acquiring the current position of the own device. The control unit 102 uses both the current position acquisition function using the signal from the access point received through the wireless LAN antenna 108A and the wireless LAN communication unit 108 and the current position acquisition function realized by the GPS antenna 109A and the GPS unit 109. it can. Thereby, the control unit 102 can more accurately specify the current position of the own device.

  The display unit 111D is a thin display device such as an LCD (Liquid Crystal Display) and an OELD (organic electroluminescence display). The touch sensor 111S is superimposed and arranged on the upper or lower side of the display screen of the display unit 111D, and detects a position designated by a user's finger or the like. The display unit 111D and the touch sensor 111S constitute a so-called touch panel 110. The touch panel 110 implements a user interface capable of display output and operation input.

  The audio processing unit 112 forms an audio signal to be supplied to the audio output terminal 113 from various audio data from the control unit 102, and supplies this to the audio output terminal 113. The audio processing unit 112 adjusts the volume, sound quality, tempo, tune (key), and the like of the audio signal supplied to the audio output terminal 113 in accordance with the control from the control unit 102 and a guidance processing unit 114 described later. Can be done. The audio output terminal 113 constitutes a connection part with the earphone 2 and the speaker.

  In this embodiment, the earphone 2 is connected to the audio output terminal 113. Accordingly, the audio signal from the audio processing unit 112 is supplied to the earphone 2 through the audio output terminal 113, and the earphone 2 emits a reproduced audio. As described above, the audio processing unit 112 and the earphone 2 connected to the audio output terminal 113 reproduce music to emit sound, reproduce an alarm sound to emit sound, reproduce various voice messages, and the like. The sound output interface is realized, for example, by emitting sound.

  The guidance processing unit 114 controls processing performed on the audio signal output by the audio processing unit 112 under the control of the control unit 102. The sound processing unit 112 can adjust the volume level of the sound emitted from each of the left-channel earphone and the right-channel earphone of the earphone 2 for each channel. For this reason, the guidance processing unit 114 controls how much the volume level of the sound emitted from each of the left-channel earphone and the right-channel earphone is set for each channel, and controls the volume of the reproduced sound. Route guidance is provided by changing the level. The audio processing unit 112 can also adjust sound quality, tempo, tune (key), and the like, in addition to volume. For this reason, the guidance processing unit 114 can also control the audio processing unit 112 to change the sound quality, tempo, tune (key), and the like as necessary.

  The control unit 102 controls a process to be performed on the audio signal output by the audio processing unit 112 via the guidance processing unit 114 based on the destination, the current position, the traveling direction, and the map information. . As a result, a sound corresponding to the processed sound signal is emitted from the earphone 2, and the route guidance to the user can be performed according to the output mode of the sound emitted from the earphone 2. ing.

  Thus, in this embodiment, the control unit 102 and the guidance processing unit 114 cooperate to realize a function as a guidance processing unit. Of course, the guidance processing unit 114 also has a function realized by the control unit 102, and outputs a voice signal output by the voice processing unit 112 based on the destination, the current position, the traveling direction, and the map information. It can also be configured to control the processing to be performed. The details of the control performed by the control unit 102 and the guidance processing unit 114 on the voice processing unit 112 in cooperation with each other will be described later.

  In the information used during the route guidance processing performed by the control unit 102 and the guidance processing unit 114 in cooperation, the destination is information input by the user through the touch panel 110. The current position is information that is sequentially acquired through the GPS antenna 109A and the GPS unit 109 when the route guidance device 1 is activated. The traveling direction is determined by taking into account the direction of the route guidance device 1 detected by the sensor unit 107, the direction of the change of the current position (the direction of the movement trajectory) sequentially acquired through the GPS unit 109, or these. This is information detected by the control unit 102.

  Also, the destination does not change after being input once, but the current position and the traveling direction change over time when the user is moving toward the destination. Therefore, the latest current position and traveling direction are sequentially acquired and used as the current position and traveling direction.

  In this embodiment, the route search unit 115 searches for a moving route (moving route) to the destination input by the user using the pedestrian network data of the pedestrian NWDB 106 in this embodiment. I do. The searched route is shown on a map, which is displayed on the display unit 111D and provided to the user. Then, the control unit 102 receives a selection input of a route from the user through the touch panel 110, sets the selected route as a route to be used for route guidance, and follows the set route to the destination. In addition, route guidance can be provided.

  Under the control of the control unit 102, the music reproducing unit 116 extracts music data corresponding to an instruction from the user from a large number of music data (song data) stored in the storage device 103, and It is supplied to the audio processing unit 112. Thus, music corresponding to the music data read from the storage device 103 is reproduced. Further, the music playback unit 116 is a so-called shuffle that plays back a large number of music data stored in the storage device 103 continuously in a predetermined order, or plays back the music data with the playback order arbitrarily changed. Playback can also be performed. That is, the music playback unit 116 implements a music playback function in the route guidance device 1 of the present embodiment.

  Under the control of the control unit 102, the map display processing unit 117 reads map data for displaying a map of an area including the current position of the own device from the map DB 105 at the time of route guidance, for example, and reads the map data. Supply to 111D. As a result, a map corresponding to the map data is displayed on the display unit 111D. The map display processing unit 117 also performs a process of sequentially changing the map of the area including the current position according to a change in the current position of the own device. Further, the map display processing unit 117 also performs a process of displaying a map including a place according to an instruction from the user.

  The route guidance device 1 according to this embodiment is different from a conventional route guidance device that provides route guidance based on a map display and voice guidance. That is, basically, the user does not need to constantly check the map display, and does not provide voice guidance such as “turn right at the next intersection”. The route guidance device 1 according to the present embodiment provides a route guidance to a user by changing an output mode of a reproduced sound such as a volume control of music being reproduced.

[Route guidance processing by music etc.]
FIG. 2 is a flowchart for explaining the route guidance processing using the reproduced voice such as music performed in the route guidance device 1 having the configuration shown in FIG. The process of the flowchart illustrated in FIG. 2 is executed by the control unit 102 when, for example, an icon corresponding to the “route guidance function by music” displayed on the display unit 111D of the route guidance device 1 is selected.

  The control unit 102 first obtains the current position of the own device via the GPS unit 109 (step S101), sets the current position as a departure point, and receives an initial screen for receiving input of necessary information such as a destination. Is displayed on the display unit 111D (step S102). Next, the control unit 102 receives input of information necessary for route guidance such as a destination via the touch panel 110 (step S103). Since the initial screen is displayed on the display unit 111D in step S102, the user inputs information to the initial screen through the touch panel 110.

  In step S103, an input such as selection of a route search mode or a route guidance mode in addition to the destination is also accepted. The route search modes include, for example, “time priority”, “distance priority”, “route priority with few turns”, and “route priority with few stairs”. As will be described in detail later, the route guidance mode includes a "destination direction guidance mode" for guiding the direction of a destination by controlling the volume of music, and a guidance for following a route searched by controlling the volume of music. There is a “route detailed guidance mode”.

  Then, the control unit 102 controls the route search unit 115 to search for a route (route) from the departure place (current position) to the destination in consideration of the information received in step S103 (step S104). Next, the control unit 102 controls the route search unit 115 and the map display processing unit 117, and displays a map indicating the route obtained as a result of the search process on the display unit 111D, so that the user The route selection and setting input are received (step S105).

  In step S105, when a plurality of routes are searched, all of them are displayed on the display unit 111D, and the user can select a route that suits his or her purpose. In step S105, a series of operation inputs relating to route selection, such as a change input of the selected route and a definite input of the selected route, can be performed.

  Thereafter, the control unit 102 receives a music playback instruction from the user, controls the music playback unit 116, and starts music playback (step S106). In step S106, the same music can be repeatedly reproduced, so-called shuffle reproduction can be performed, and music data of different music stored in the designated folder can be sequentially reproduced. Then, the control unit 102 starts a process of acquiring the current position from the GPS unit 109 and a process of detecting the traveling direction of the own device (step S107). Thereby, the route guidance apparatus 1 can always grasp the current position and the traveling direction at that time.

  In the detection of the traveling direction, the posture of the route guidance device 1 in a state where the user is moving is specified, and the traveling direction of the user in the posture is detected as the traveling direction. Therefore, even when the user is walking while holding the route guidance device 1 and looking at the map display, or when the user is walking with the route guidance device 1 in the inner pocket of the outerwear, In any of the various cases, it is necessary that the traveling direction of the user can be appropriately detected.

  For this reason, the control unit 102 considers not only the attitude and the orientation of the route guidance device 1 from the sensor unit 107 but also the trajectory of the change of the current position and the searched route as needed. That is, since the posture of the route guidance device 1 is currently in any state and the user is moving in any direction, which direction of the direction detected by the sensor unit 107 of the route guidance device 1 is the progress of the user. The direction (the direction of the user) can be appropriately detected.

  For example, it is assumed that the route guidance device 1 is in a posture in which the display unit 111D is placed in the inner pocket of the user's outerwear with the display unit 111D facing the user. In this posture, the display screen of the display unit 111D of the route guidance device 1 is substantially parallel to the direction of gravity (vertical direction). In this case, the traveling direction of the user is orthogonal to the display screen of the display unit 111D and is a direction from the front side of the display unit 111D to the rear side of the route guidance device 1. Therefore, the azimuth (direction) that is detected by the sensor unit 107 of the route guidance device 1 and that is orthogonal to the display screen of the display unit 111D and that indicates the direction from the front surface of the display unit 111D to the back surface of the route guidance device 1 is: The direction of travel of the user.

  Further, for example, it is assumed that the route guidance device 1 is held in the hand of the user, and the user is in a posture in which the user looks into the display unit 111D from above. In this posture, the display screen of the display unit 111D of the route guidance device 1 is in a state of intersecting with the direction of gravity (vertical direction). In this case, the traveling direction of the user is a direction from the lower side of the display screen of the display unit 111D to the upper side. Of course, whether the route guide device 1 is vertical or horizontal is also considered, and the inclination of the route guide device 1 is also considered. Therefore, the azimuth (direction) indicated by the direction from the lower side to the upper side of the display unit 111D detected by the sensor unit 107 of the route guidance device 1 is the traveling direction of the user.

  Then, the control unit 102 controls the guidance processing unit 114 to execute the route guidance processing according to the route guidance mode accepted in step S103 as described above (step S108). In this embodiment, in step S108, route guidance is performed in a “destination direction guidance mode” in which the direction of a destination is guided by music volume control, and guidance is provided so that the route searched by music volume control can be followed. One of the guidances in the "detailed route guidance mode" is performed.

  When the user having the route guidance device 1 arrives at the destination or terminates the route guidance process, the route guidance process executed in step S108 ends, and a predetermined end process is executed. (Step S109), the processing illustrated in FIG. 2 ends. In the end processing of step S109, predetermined processing such as returning the display of the display unit 111D to the display before executing the music route guidance function shown in FIG. 2 is executed.

  In this way, the route guidance device 1 of this embodiment performs route guidance according to the output mode of the reproduced sound. Although not shown in FIG. 2, for example, in the step of receiving an operation input from the user, such as step S103, step S105, or step S106, the “route guidance processing using reproduced sound such as music” is ended. A termination operation for the purpose can be received.

  Therefore, when an end operation from the user is received, a predetermined end process can be performed by, for example, an interrupt process, and the process shown in FIG. 2 can be ended. That is, even when a user's termination instruction is received, the route guidance process using the reproduced sound such as music shown in FIG. 2 can be terminated.

  Hereinafter, each of the processing in the destination guidance mode and the processing in the detailed route guidance mode executed in step S108 shown in FIG. 2 will be specifically described.

[Destination direction guidance mode]
FIG. 3 is a flowchart for explaining the route guidance processing in the destination direction guidance mode performed in the processing of step S108 shown in FIG. FIG. 4 is a diagram for explaining an example of volume control in the destination direction guidance mode shown in FIG. The destination direction guidance mode described below controls the volume of the reproduced sound heard by the user through the earphone 2 so that the user can always recognize the direction of the destination, and the user can go to the destination. It is intended to be able to guide so as not to get lost.

  When executing the route guidance process in the destination direction guidance mode shown in FIG. 3, the control unit 102 first specifies the direction (traveling direction) of the user (step S201). In the route guidance device 1 according to this embodiment, by the processing started in step S107 in FIG. 2, the posture and orientation of the route guidance device 1 from the sensor unit 107, the trajectory of the change in the current position, the searched route, and the like are determined. In consideration of this, the traveling direction of the user is detected. In step S201, the traveling direction of the user at the present time is specified based on the detection result.

  Next, the control unit 102 specifies a destination direction which is the direction of the destination from the current position on the map (step S202). Then, the control unit 102 calculates an angle between the traveling direction specified in step S201 and the destination direction specified in step S202 (step S203). For example, as shown in FIG. 4, the current position O is specified on the map, and the direction indicated by the solid arrow (the upward direction of FIG. 4 and the direction indicated by the character A (direction A)) proceeds from the current position O. It is assumed that the direction is specified. Then, for example, it is assumed that the destination direction is the direction indicated by the character B from the current position O (B direction) on the map. In this case, the angle θ between the traveling direction (A direction) and the destination direction (B direction) with the current position O as the vertex can be obtained by the cosine theorem.

Briefly, as shown in FIG. 4, the current position O is defined as one vertex, a straight line L connecting the traveling direction (A direction) and the destination direction (B direction) is drawn, and the traveling direction (A direction) is determined. Let P be the intersection with the straight line L and Q be the intersection between the destination direction (B direction) and the straight line L. Then, the length of the side PQ is a, the length of the side OQ is b, and the length between the sides OP is c, and the lengths a, b, and c of these sides are obtained. Then, by substituting the obtained lengths a, b, and c into “cos θ = b ² + c ² −a ² / 2bc” which is an expression of the cosine theorem, cos θ is obtained, and the angle θ can be specified from this.

  Note that, as described with reference to FIG. 4, the current position O and the positions P and Q can be specified on a map and on coordinates corresponding to the map. In particular, the position P may be in the traveling direction, and the position Q may be in the destination area improvement. Therefore, the angle θ between the traveling direction and the destination direction can be obtained by calculation by expanding the current position O and the positions P and Q on the coordinates formed on the memory.

  Then, the control unit 102 determines which side is the destination direction specified in step S202 with respect to the traveling direction specified in step S201 (step S204). That is, as shown in FIG. 4, the control unit 102 assumes that the direction indicated by the solid arrow (the upward direction (A direction) in FIG. 4) is the traveling direction. If the destination direction is the same direction A, it can be determined that the destination direction with respect to the traveling direction is forward.

  Similarly, in FIG. 4, if the destination direction is the B direction, the destination direction with respect to the traveling direction is the left front, and if the destination direction is the C direction, the destination direction with respect to the traveling direction is the left direction. It can be determined that there is. If the destination direction is the D direction, the destination direction with respect to the traveling direction is left rearward, and if the destination direction is the E direction, the destination direction with respect to the traveling direction can be determined to be rearward. If the destination direction is the F direction, the destination direction with respect to the traveling direction is right rearward, and if the destination direction is the G direction, it can be determined that the destination direction with respect to the traveling direction is right direction. If the destination direction is the H direction, it can be determined that the destination direction with respect to the traveling direction is forward right.

  Then, according to the result of the determination processing in step S204, the control unit 102 controls the audio processing unit 112 via the guidance processing unit 114, and controls (adjusts) the volume of the sound emitted from each of the left and right sides of the earphone 2. ). Specifically, in the determination processing of step S204, when it is determined that the destination direction with respect to the traveling direction is forward, as shown in the position of the direction A in FIG. Are controlled to be equal (step S205).

  In addition, in the determination processing of step S204, when it is determined that the destination direction with respect to the traveling direction is the front left, the volume level of the earphone 2 from the left is increased as shown in the position in the direction B of FIG. Control is performed to reduce the volume level from the right (step S206). In addition, in the determination processing of step S204, when it is determined that the destination direction with respect to the traveling direction is the rear left, the volume level of the earphone 2 from the left is reduced as shown in the position in the direction D of FIG. The volume level from the right is controlled to be 0 (zero) (step S207).

  In addition, in the determination processing in step S204, when it is determined that the destination direction with respect to the traveling direction is backward, the volume levels from the left and right of the earphone 2 are set to 0 (zero) as shown in the position of the E direction in FIG. ) To control not to emit music (step S208). In addition, in the determination processing of step S204, when it is determined that the destination direction with respect to the traveling direction is right rearward, the volume level of the earphone 2 from the left is set to 0 (zero) as shown in the position of the F direction in FIG. ), And control is performed to reduce the volume level from the right (step S209).

  In addition, in the determination processing of step S204, when it is determined that the destination direction with respect to the traveling direction is the front right, the volume level of the earphone 2 from the left is reduced as shown in the position of the H direction in FIG. Control is performed to increase the volume level from the right (step S210). Note that the left and right volume levels are adjusted according to the angle between the traveling direction and the destination direction calculated in step S203. That is, in the case of the example shown in FIG. 4, when the destination direction is forward left (direction B) with respect to the traveling direction, the volume level on the left is increased as the angle θ is increased. The right volume level is reduced, and as the angle θ decreases, the left volume level is reduced and the right volume level is increased. By doing so, the user can appropriately recognize the direction in which the destination is located, depending on the difference between the left and right sound volumes.

  Although not shown in the flowchart of FIG. 3 as individual steps, it is assumed that the destination direction with respect to the traveling direction is determined to be a rightward direction in the determination processing of step S204. In this case, as shown in the position in the direction C of FIG. 4, control is performed such that the volume level of the earphone 2 from the left is increased and the volume level from the right is set to 0 (zero). Also, it is assumed that the destination direction with respect to the traveling direction is determined to be a rightward direction in the determination processing of step S204. In this case, as shown in the position in the G direction in FIG. 4, the volume level of the earphone 2 from the left is set to 0 (zero), and the volume level from the right is increased.

  Thereby, for example, an inconvenience such as passing an intersection to make a right or left turn can be reliably prevented. For example, to give a simple example, suppose that you will arrive at your destination if you turn left at the next intersection and go straight. In this case, near the intersection, the left earphone of the earphone 2 mainly hears a large sound, and the right earphone does not hear the sound, so that the intersection to be turned left is not mistaken. Then, when the intersection is turned left, the direction of the destination coincides with the traveling direction, so that music of the same volume level is emitted from the left and right of the earphone 2. Thus, the user can surely recognize that there is no error in the route being followed.

  Then, after the volume adjustment processing shown in steps S205 to S210, control unit 102 determines whether or not the vehicle has arrived at the destination based on the set destination and the current position of the own device. (Step S211). When it is determined in the determination processing of step S211 that the vehicle has not arrived at the destination, the control unit 102 repeats the processing from step S201. When it is determined in step S211 that the vehicle has arrived at the destination, the control unit 102 emits a sound indicating that the vehicle has arrived at the destination from the earphone 2 through the voice processing unit 112 and the voice output terminal 113. (Step S212), the process exits the process illustrated in FIG. 3, returns to the main routine illustrated in FIG. 2, and ends the route guidance process using the reproduced sound such as music.

  As can be seen from the above description, the processes in steps S204 to S210 can be said to be processes for performing volume control according to the angle between the traveling direction and the destination direction obtained in step S203. For example, in FIG. 4, consider a case where the destination direction changes counterclockwise. In this case, when the angle θ is 0 degree, since the traveling direction and the destination direction match, the left and right volume levels of the earphone 2 are the same. Then, in the range where the angle θ is 0 to 90 degrees (the upper left range in FIG. 4), as the angle θ increases, the volume level of the left earphone does not change, but the volume level of the right earphone gradually decreases. Go. When the angle θ becomes 90 degrees, the volume level of the left earphone remains high, while the volume level of the right earphone becomes 0 (zero), as shown in the direction C of FIG.

  Then, when the angle θ is in the range from 90 degrees to 180 degrees (the lower left part in FIG. 4), the volume level of the left earphone decreases as the angle θ increases. In this range, the volume level of the right earphone remains at 0 (zero). When the angle θ becomes 180 degrees, the volume level of the left earphone also becomes 0 (zero) and the volume level of both the left and right earphones becomes 0 (zero), as shown in the direction E of FIG.

  Here, in FIG. 4, the case where the destination direction changes counterclockwise is considered, but when the destination direction changes clockwise, the left and right volume control is reversed. That is, in the range where the angle θ is 0 to 90 degrees (the range in the upper right part of FIG. 4), as the angle θ increases, the volume level of the right earphone does not change, but the volume level of the left earphone gradually decreases. Go. When the angle θ becomes 90 degrees, the volume level of the right earphone remains high, while the volume level of the left earphone becomes 0 (zero), as shown in the direction G in FIG.

  Then, in the range where the angle θ is 90 degrees to 180 degrees (the lower right range in FIG. 4), the volume level of the right earphone decreases as the angle θ increases. In this range, the volume level of the left earphone remains at 0 (zero). When the angle θ becomes 180 degrees, the volume level of the right earphone also becomes 0 (zero), and the volume level of both the right and left earphones becomes 0 (zero) as shown in the direction E of FIG.

  Thereby, the user can always recognize which direction the destination is. Then, if the route provided in the process of step S105 shown in FIG. 2 is confirmed on the map, the user can listen to the music from the earphone 2 without moving while checking the map. You can follow the selected route. This makes it possible to arrive at the destination reliably and quickly without having to stop and check the map. In addition, since the user can head to the destination while listening to his favorite music, he / she can walk rhythmically and feel the effect of safely reducing the travel time.

  In addition, as described above, the left and right volume levels are controlled in accordance with the angle θ between the traveling direction and the destination direction, but the speed at which the volume changes according to the angle θ has been described. It is also possible to notify that the turning angle is slow or fast. That is, when the angle θ between the traveling direction and the destination direction is small, the left and right sound volume levels are set to the desired sound volume level quickly. Thus, it is possible to instruct the user to select a road that goes slightly to the left or a road that goes slightly to the right instead of turning sharply. When the angle θ between the traveling direction and the destination direction is large, the left and right volume levels are set to the target volume level later according to the angle. Thereby, it is possible to give an instruction to select a largely turning road according to the change in the volume level.

  In FIG. 4, the volume level is described as large, small, and 0 (zero). However, as described above, the left and right volume levels are set according to the angle θ between the traveling direction and the destination direction. Can be appropriately adjusted and controlled.

[Detailed route guidance mode]
FIGS. 5 and 6 are flowcharts for explaining the route guidance process in the detailed route guidance mode executed in the process of step S108 shown in FIG. FIG. 7 is a diagram for describing an example of volume control in the detailed route guidance mode shown in FIGS. 5 and 6. The route detailed guidance mode described below controls the volume of the reproduced sound heard by the user through the earphone 2 so that the set route can be faithfully followed, and the user gets lost in the destination. It is to be able to guide so that there is nothing.

  Then, when the control unit 102 executes the route guidance process in the detailed route guidance mode shown in FIGS. 5 and 6, first, on the route from the moving departure point to the destination, the next intersection turns right or left. It is determined whether or not there is a certain intersection (step S301). This determination process can be performed based on the traveling direction of the own device, the current position of the own device, the pedestrian network data of the pedestrian NWDB 106, and the searched route. The traveling direction of the own device (user) and the current position are detected or acquired by the process started in step S107 shown in FIG. 2, as in the process in the destination direction guidance mode. Use something.

In the determination processing of step S301, it is assumed that it is determined that the next intersection is not an intersection with a right / left turn. In this case, the control unit 102 controls the audio processing unit 112 through the guidance processing unit 114 so that the music being reproduced is output from the left and right earphones of the earphone 2 at an equal volume level (step S302). . If the music has already been reproduced at the same volume level, the process of step S302 can be skipped.

  In the determination processing in step S301, it is assumed that the next intersection is determined to be an intersection with a right / left turn. In this case, the control unit 102 controls the audio processing unit 112 via the guidance processing unit 114 to lower the volume of music emitted from both the left and right earphones of the earphone 2 (step S303). Thus, the user is notified that the next intersection is an intersection with a right or left turn.

  Next, the control unit 102 determines whether or not the intersection determined to have a right / left turn in step S301 is an intersection to be turned left (step S304). The determination process in step S304 can be determined based on the information acquired in the determination process in step S301. That is, even in the determination processing in step S301, it is determined whether or not the next intersection is an intersection that requires a left turn or a right turn, and the result can be used.

  In the determination processing in step S304, it is assumed that the next intersection is determined to be an intersection to be turned left. In this case, the control unit 102 controls the audio processing unit 112 via the guidance processing unit 114, and firstly raises the right volume, and then performs volume level adjustment control to increase the left volume while lowering the right volume. Perform (step S305). By performing such a volume level effect, the user is instructed to turn left at the next intersection.

  FIG. 7A is a diagram for describing an example of volume level adjustment control in the case of a left turn performed in step S305. In the case of a left turn, as shown in FIG. 7A, when the vehicle is traveling straight ahead, as shown in step S1L, the volume levels LL and RL of the sounds emitted from the left and right sides of the earphone 2 are both volume levels. Are equal to the value 5. That is, this state is a state in which the vehicle directs straight ahead.

  In this case, assuming that the next intersection is an intersection that turns left, first, both the left and right volume levels LL and RL are reduced to a value of 0 (step S2L), and a notification that the next intersection is an intersection that turns left or right is made. I do. Next, the right volume level is increased to a value of 5 (step S3L). Thereafter, the left volume level is increased from the value 0 to the value 2, and the right volume level is simultaneously reduced from the value 5 to the value 4 (step S4L). Next, the left volume level is increased from value 2 to value 4 and the right volume level is simultaneously reduced from value 4 to value 2 (step S5L). Then, the left volume level is increased from the value 4 to the value 5, and the right volume level is simultaneously reduced from the value 2 to the value 0 (step S6L). Thereafter, the processes from step S2L to step S6L are repeated until the left turn is completed. Thereby, it is possible to appropriately guide the intersection where the vehicle turns left.

  Further, it is assumed that it is determined in the determination processing in step S304 that the next intersection is not an intersection to be turned left (an intersection to be turned right). In this case, the control unit 102 controls the audio processing unit 112 via the guidance processing unit 114, and firstly raises the left volume, and then performs volume level adjustment control to increase the right volume while lowering the left volume. Perform (Step S306). By performing such a volume level effect, the user is instructed to turn right at the next intersection.

  FIG. 7B is a diagram for describing an example of volume level adjustment control in the case of a right turn performed in step S306. In the case of a right turn, as shown in FIG. 7B, when the vehicle is traveling straight, as shown in step S1R, the volume levels LL and RL of the sounds emitted from the left and right earphones of the earphone 2 are all equal. It is assumed that the volume level is equal to a value of 5. That is, this state is a state in which the vehicle directs straight ahead.

  In this case, assuming that the next intersection is an intersection that turns right, first, both left and right volume levels LL and RL are reduced to a value of 0 (step S2R), and a notification that the next intersection is an intersection that turns left or right is made. I do. Next, only the left volume level is increased to a value of 5 (step S3R). Thereafter, the right volume level is increased from value 0 to value 2 and the left volume level is simultaneously reduced from value 5 to value 4 (step S4R). Next, the right volume level is increased from value 2 to value 4 and the left volume level is simultaneously reduced from value 4 to value 2 (step S5R). Then, the right volume level is increased from the value 4 to the value 5, and the left volume level is simultaneously reduced from the value 2 to the value 0 (step S6R). Thereafter, the processing from step S2R to step S6R is repeated until the right turn is completed. Thereby, it is possible to appropriately guide the intersection where the vehicle turns right.

  Then, the control unit 102 determines whether the left turn or the right turn is completed based on the traveling direction of the own device, the current position of the own device, the pedestrian network data of the pedestrian NWDB 106, and the searched route. It is determined (step S307). If it is determined in step S307 that the left or right turn has not been completed, the process from step S303 is repeated to guide the left or right turn (steps S303 to S307) so that the searched route can be followed. Process) is repeated.

  In the determination processing of step S307, when it is determined that the left turn or the right turn has been completed, the control unit 102 controls the audio processing unit 112 via the guidance processing unit 114 to equalize the volume level from the left and right of the earphone 2. The music is emitted (step S308). Thereafter, the control unit 102 determines whether the vehicle has deviated from the set route based on the traveling direction of the own device, the current position of the own device, the pedestrian network data of the pedestrian NWDB 106, and the searched route. Is determined (step S309). This discriminating process is for discriminating whether or not the direction to turn is wrong.

  If it is determined in the determination processing of step S309 that the vehicle has not deviated from the set route, the process proceeds to step S310 in FIG. 6, and it is determined whether the vehicle has arrived at the destination (step S310). It is assumed that it is determined in the determination processing of step S310 that the vehicle has arrived at the destination. In this case, the control unit 102 emits a sound indicating that the vehicle has arrived at the destination from the earphone 2 through the sound processing unit 112 and the sound output terminal 113 (step S311), and exits the processing illustrated in FIGS. Then, the process returns to the main routine shown in FIG. 2, and the route guidance by music is ended. If it is determined in the determination processing of step S310 that the vehicle has not arrived at the destination, the processing from step S301 shown in FIG. 5 is repeated.

If it is determined in step S309 that the music has deviated from the set route, the vehicle has turned in the wrong direction. Therefore, the process proceeds to step S312 in FIG. The user is alerted that the route has been mistaken by increasing or decreasing the volume (step S312). Then, the control unit 102 determines the set route based on the traveling direction of the own device, the current position of the own device, the pedestrian network data of the pedestrian NWDB 106, the searched route, and the set route. It is determined whether the process has returned to (step S313).

  When the control unit 102 determines in the determination process of step S313 that the route has not returned to the set route, the control unit 102 controls the route search unit 115 to perform a re-search process (reroute process) of the route from the current position to the destination. Execute (step S314) and set a new route. After that, the control unit 102 controls the music reproduction unit 116 to change the music to be reproduced (step S315). The user is notified that the route has been changed (rerouted) due to the midway change of the music to be played.

  Then, the control unit 102 displays a map indicating the new route on the display unit 111D so that the map can be provided to the user (step S316). If the music is changed in the middle of the process in step S315, the user can know that the music has been rerouted. In this case, by looking at the map displayed on the display unit 111D in step S316, it is possible to confirm a new route and head to the destination. After the processing in step S316 and when it is determined in the determination processing in step S313 that the vehicle has returned to the set route, the control unit 102 repeats the processing from step S301 shown in FIG. Is continued.

  This allows the user to know in advance the intersection to turn right and left according to the change in the volume level of the music played from the earphone 2 and to distinguish between left and right turns. Route can be reliably followed. In addition, since there is almost no need to check the map while traveling, it is possible to expect a reduction in traveling time.

  Note that the level values of the sound volume levels shown in FIG. 7 are merely examples, and it is needless to say that more detailed control is possible.

[Effects of Embodiment]
As described above, in the case of the route guidance apparatus 1 according to the present embodiment, various voice messages such as "Please turn left (turn right) at the next intersection" and "Go straight ahead" are used. The route guidance can be performed by the adjustment control of the volume level of the emitted sound without any sound. For this reason, the user properly knows the direction to go in accordance with the change in the left and right volume levels emitted from the earphone 2 of the music to be reproduced while listening to the music of his / her favorite, and without hesitation. You can head to your destination.

  Further, it is not necessary to stop and check the map frequently while moving, and since the user can move while listening to his favorite music, shortening of the moving time can be expected. The route guidance device 1 according to the present embodiment is effective in a case where the user does not know the land and walks to a relatively short distance destination.

[Modification]
In the above-described embodiment, the route guidance is performed by changing the output mode of the reproduced sound by adjusting the volume level of the reproduced sound. However, the present invention is not limited to this. In addition to the sound volume, the output mode of the reproduced sound may be changed to perform route guidance by adjusting the tempo, the tune, and the key. For example, it is also possible to perform route guidance by deciding that the tempo is normal tempo for straight ahead, faster than usual for left turn, and slower than usual for right turn. In addition, it is possible to perform route guidance by deciding that the tune is changed to a normal tune when traveling straight ahead, to a major tune when turning left, and to a more minor tune when turning right. In addition, route guidance can also be performed by deciding that a straight key is a normal key (interval), a left turn is a higher key than usual, and a right turn is a lower key than usual.

  In addition, when the vehicle reaches the vicinity of the destination, the volume level may be increased, the tempo, the melody or the key may be changed, or the music (song) to be reproduced may be changed. The music to be reproduced does not need to be so-called stereo sound, but may be monaural sound.

  Also, there is an earphone having only one ear instead of an earphone including two earphones for the left ear and the right as shown in FIG. In this way, even when using earphones with only one ear, route guidance is possible if, for example, it is determined that a straight ahead has a normal voice level, a left turn has a higher voice level than normal, and a right turn has a lower voice level than normal. is there. Also, when using earphones with only one ear, route guidance can be performed by performing the above-described tempo and tune adjustment control.

  Further, the user can switch between the case of using the binaural earphone and the case of using the one-ear earphone so as to change the content of the adjustment control for the reproduced sound. If it is possible to automatically determine whether the binaural earphone is connected or the one-ear earphone is connected according to the connection state of the audio connection terminal of the audio output terminal 113, the binaural earphone is automatically connected. The content of the adjustment control for the reproduced sound can be changed between the case where the earphone is used and the case where the earphone for one ear is used.

  In addition, route guidance may be performed by combining adjustment controls such as a volume level, a tempo, a tune, and a key.

  Further, in the above-described embodiment, the case of moving while playing and listening to music has been described as an example, but the present invention is not limited to this. For example, various sounds such as an electronic sound such as a rhythm sound and a synthetic sound can be used as the sound to be reproduced. However, no matter what kind of sound is reproduced, the reproduced sound itself does not need to be a voice message having a meaning to guide a route.

[Others]
As can be seen from the description of the above-described embodiment, the function of the reception unit is realized by the touch panel 110, the function of the current position acquisition unit is realized by the GPS unit 109, and the function of the detection unit is the same as that of the control unit 102. The sensor unit 107 is realized in cooperation. The function of the guidance processing unit is realized by the control unit 102 and the guidance processing unit 114 working together. The function of the search means is realized by the route search unit 115. The functions of the direction specifying unit, the intersection determining unit, and the direction determining unit are realized by the control unit 102. Further, the function of the music reproducing unit is realized by the music reproducing unit 116.

  The processing in the flowcharts shown in FIGS. 2, 3, 5, and 6 corresponds to an embodiment of the route guidance method according to the present invention. A program for executing the processing of the flowcharts shown in FIGS. 2, 3, 5, and 6 corresponds to an embodiment of the route guidance program of the present invention. The functions of the audio processing unit 112, the guidance processing unit 114, the route search unit 115, the music reproduction unit 116, and the map display processing unit 117 are realized as functions of the control unit 102 by a program executed by the control unit 102. You can also.

DESCRIPTION OF SYMBOLS 1 ... Route guidance apparatus (mobile telephone terminal), 101 ... Wireless communication part, 101A ... Transmission / reception antenna, 102 ... Control part, 103 ... Storage device, 104 ... Operation part, 105 ... Map DB, 106 ... Pedestrian NWDB, 107 ... Sensor unit, 108: Wireless LAN unit, 108A: Wireless LAN antenna, 109: GPS unit, 109A: GPS antenna, 111D: Display unit, 111S: Touch sensor, 110: Touch panel, 112: Audio processing unit, 113: Audio output terminal , 114: guidance processing unit, 115: route search unit, 116: music playback unit, 117: map display processing unit, 2: earphone

Claims (6)

A receiving means for receiving an input of a destination;
Current position obtaining means for obtaining the current position of the own device;
Detecting means for detecting the traveling direction of the own aircraft;
Audio processing means for performing audio volume level adjustment processing for each channel on the audio signals of the left channel and the right channel to be output, and outputting audio through the left channel and the right channel;
The user should proceed based on the destination received through the reception unit, the current position acquired by the current position acquisition unit, the traveling direction detected by the detection unit, and map information. Direction specifying means for specifying a direction;
In accordance with the direction to be traveled specified by the direction specifying means, the audio processing means is controlled to perform a volume level adjustment process on an output audio signal, and one of the left channel and the right channel is controlled. Or, guidance processing means for performing route guidance according to a sound output mode corresponding to the sound volume level of the sound output from the left channel and the right channel, including the case where both sound volume levels become 0 (zero); With
The guidance processing means, when guiding the destination direction of the destination at the current position, the output mode of audio through both the left channel and the right channel,
When the destination direction is backward with respect to the traveling direction, the sound volume level is 0 (zero) in both channels,
When the destination direction is forward with respect to the traveling direction, a mode in which the volume level is output at the same volume level other than 0 (zero) in both channels,
When the destination direction deviates left and right with respect to the traveling direction, depending on the angle between the traveling direction and the destination direction, including the case where the volume level of one channel becomes 0 (zero), By outputting at different volume levels in both channels,
A route guidance device for performing the route guidance. A receiving means for receiving an input of a destination;
Current position obtaining means for obtaining the current position of the own device;
Detecting means for detecting the traveling direction of the own aircraft;
Audio processing means for performing audio volume level adjustment processing for each channel on the audio signals of the left channel and the right channel to be output, and outputting audio through the left channel and the right channel;
The user should proceed based on the destination received through the reception unit, the current position acquired by the current position acquisition unit, the traveling direction detected by the detection unit, and map information. Direction specifying means for specifying a direction;
In accordance with the direction to be traveled specified by the direction specifying means, the audio processing means is controlled to perform a volume level adjustment process on an output audio signal, and one of the left channel and the right channel is controlled. Or, guidance processing means for performing route guidance according to a sound output mode corresponding to the sound volume level of the sound output from the left channel and the right channel, including the case where both sound volume levels become 0 (zero); ,
Searching means for searching for a route from the departure place to the destination,
Based on the current position acquired by the current position acquisition unit, the traveling direction detected by the detection unit, and the route searched by the search unit, the next intersection is on a route guide, a right turn or Intersection determining means for determining whether or not the intersection has a left turn;
When the next intersection is determined to be an intersection with a right turn or a left turn on the route guidance by the intersection determination means, based on the information used by the intersection determination means, the direction of the right or left turn of the next intersection. And music reproduction means for extracting music data to be reproduced and supplying the extracted music data to the audio processing means.
The audio processing means forms and processes the audio signal output from the music data from the music reproducing means,
The guidance processing means, in the case of guiding the searched route by the search means, the audio output mode through both channels of the left channel and the right channel, at the intersection determining means next intersection path In the guidance, when it is determined that the intersection has a right turn or a left turn, the volume level of the channel corresponding to the right / left turn direction determined by the direction determination unit out of the left channel and the right channel gradually increases. In a mode in which the volume level of the channel corresponding to the direction opposite to the direction of right / left turn determined by the direction determination means is output so as to gradually decrease ,
If the guidance processing means determines that the vehicle has deviated from the route searched by the search means, it raises or lowers the volume of the sound to be emitted and calls attention, and controls the search means to perform a re-search process to newly execute the search. A route guidance device for controlling music playback means to change music data to be played back when a suitable route is set. A receiving step of receiving an input of a destination through a receiving means;
A current position acquisition step of acquiring the current position of the own device through the current position acquisition means;
A detection step of detecting the traveling direction of the own device through the detection means,
A sound processing unit that performs a sound volume level adjustment process for each of the left and right channel audio signals to be output so that sound is output through the left and right channels; Processing steps;
Based on the destination received in the receiving step, the current position acquired in the current position acquiring step, the traveling direction detected in the detecting step, and map information, A direction specifying step for specifying a direction to proceed;
In accordance with the direction to proceed specified in the direction specifying step, the guidance processing unit controls the volume level adjustment processing in the audio processing step, and performs volume level adjustment processing on the output audio signal, Including the case where the volume level of one or both of the left channel and the right channel is 0 (zero), the path is determined by the audio output mode according to the volume level of the audio output from the left channel and the right channel. And a guidance processing step for providing guidance.
In the guidance processing step, when guiding the destination direction of the destination at the current position, the output mode of sound through both the left channel and the right channel,
When the destination direction is backward with respect to the traveling direction, the sound volume level is 0 (zero) in both channels,
When the destination direction is forward with respect to the traveling direction, a mode in which the volume level is output at the same volume level other than 0 (zero) in both channels,
When the destination direction deviates left and right with respect to the traveling direction, depending on the angle between the traveling direction and the destination direction, including the case where the volume level of one channel becomes 0 (zero), By outputting at different volume levels in both channels,
A route guidance method, wherein the route guidance is performed. A receiving step of receiving an input of a destination through a receiving means;
A current position acquisition step of acquiring the current position of the own device through the current position acquisition means;
A detection step of detecting the traveling direction of the own device through the detection means,
A sound processing unit that performs a sound volume level adjustment process for each of the left and right channel audio signals to be output so that sound is output through the left and right channels; Processing steps;
Based on the destination received in the receiving step, the current position acquired in the current position acquiring step, the traveling direction detected in the detecting step, and map information, A direction specifying step for specifying a direction to proceed;
In accordance with the direction to proceed specified in the direction specifying step, the guidance processing unit controls the volume level adjustment processing in the audio processing step, and performs volume level adjustment processing on the output audio signal, Including the case where the volume level of one or both of the left channel and the right channel is 0 (zero), the path is determined by the audio output mode according to the volume level of the audio output from the left channel and the right channel. A guidance processing step for providing guidance;
Searching means for searching for a route from the departure place to the destination,
Intersection discrimination means, based on the current position acquired in the current position acquisition step, the traveling direction detected in the detection step, and the route searched in the search step, the next intersection on the route guidance, An intersection determination step of determining whether or not the intersection has a right turn or a left turn;
When it is determined in the intersection determination step that the next intersection is an intersection with a right turn or a left turn on the route guidance , the direction determination unit determines the right of the next intersection based on the information used in the intersection determination step. A direction determination step of determining the direction of left turn; and a music reproduction step, wherein music reproduction means extracts music data to be reproduced and supplies the data to the audio processing means functioning in the audio processing step.
In the audio processing step, the audio signal output from the music data supplied in the music reproduction step is formed and processed.
In the guidance processing step, when said guiding the searched route in the search process, the audio output mode through both channels of the left channel and the right channel, at the intersection determination step next intersection path on the guide, when it is determined that the intersection of right or left turn, among the right channel and the left channel, up volume level of the channel corresponding to the direction of the right turn which is determined by the direction determination step gradually, the In a mode in which the volume level of the channel corresponding to the direction opposite to the direction of right / left turn determined in the direction determination step is output so as to gradually decrease ,
In the guidance processing step, when it is determined that the user deviates from the route searched in the search step, the volume of the sound to be emitted is raised or lowered to alert the user. A route guidance method comprising: controlling a music reproducing unit that functions in the music reproducing step to change music data to be reproduced when a proper route is set. A computer mounted on a route guidance device with an audio output function
A receiving step of receiving an input of a destination through a receiving means;
A current position obtaining step of obtaining the current position of the own device through the current position obtaining means;
A detecting step of detecting the traveling direction of the own device through the detecting means;
A sound processing unit that performs a sound volume level adjustment process for each of the left and right channel audio signals to be output so that sound is output through the left and right channels; Processing steps;
Based on the destination received in the receiving step, the current position obtained in the current position obtaining step, the traveling direction detected in the detecting step, and map information, A direction identifying step for identifying a direction to go,
In accordance with the direction to proceed identified in the direction identification step , the guidance processing means controls the volume level adjustment processing in the audio processing step, and performs volume level adjustment processing on the output audio signal, Including the case where the volume level of one or both of the left channel and the right channel is 0 (zero), the path is determined by the audio output mode according to the volume level of the audio output from the left channel and the right channel. And performing a guidance processing step to perform guidance, and
In the guidance processing step, when guiding the destination direction of the destination at the current position, the output mode of audio through both the left channel and the right channel,
When the destination direction is backward with respect to the traveling direction, the sound volume level is 0 (zero) in both channels,
When the destination direction is forward with respect to the traveling direction, a mode in which the volume level is output at the same volume level other than 0 (zero) in both channels,
When the destination direction deviates left and right with respect to the traveling direction, depending on the angle between the traveling direction and the destination direction, including the case where the volume level of one channel becomes 0 (zero), By outputting at different volume levels in both channels,
A computer-readable route guidance program for performing the route guidance. A receiving step of receiving an input of a destination through a receiving means;
A current position obtaining step of obtaining the current position of the own device through the current position obtaining means;
A detecting step of detecting the traveling direction of the own device through the detecting means;
A sound processing unit that performs a sound volume level adjustment process for each of the left and right channel audio signals to be output so that sound is output through the left and right channels; Processing steps;
Based on the destination received in the receiving step, the current position obtained in the current position obtaining step, the traveling direction detected in the detecting step, and map information, A direction identifying step for identifying a direction to go,
In accordance with the direction to proceed identified in the direction identification step , the guidance processing means controls the volume level adjustment processing in the audio processing step, and performs volume level adjustment processing on the output audio signal, Including the case where the volume level of one or both of the left channel and the right channel is 0 (zero), the path is determined by the audio output mode according to the volume level of the audio output from the left channel and the right channel. A guidance processing step for providing guidance;
A search step for searching for a route from the departure place to the destination,
Based on the current position acquired in the current position acquisition step, the traveling direction detected in the detection step, and the route searched in the search step, the next intersection is determined on the route guidance, An intersection determination step of determining whether or not the intersection has a right turn or a left turn;
The next intersection route guidance with the intersection determination step, when it is determined that the intersection of right or left turn, the direction determining means, based on the information used in the intersection determination step, the right of the next intersection A direction determining step of determining the direction of a left turn ;
Music reproducing means for extracting music data to be reproduced and supplying the audio data to the sound processing means functioning in the sound processing step.
In the sound processing step, forming and processing the sound signal to be output from the music data supplied in the music reproduction step,
In the guidance processing step, when said guiding the searched route in the search step, the sound output mode through both channels of the left channel and the right channel, at the intersection determination step next intersection path on the guide, when it is determined that the intersection of right or left turn, among the right channel and the left channel, up volume level of the channel corresponding to the direction of the right turn which is determined by the direction determination step gradually, the A mode in which the volume level of the channel corresponding to the direction opposite to the direction of right / left turn determined in the direction determination step is output so as to gradually decrease ,
In the guidance processing step, when it is determined that the vehicle has deviated from the route searched in the search step, the volume of the sound to be emitted is raised or lowered to alert the user, and the search step is controlled to perform the re-search processing, and a new search is performed. A computer-readable route guidance program for controlling music playback means that functions in the music playback step to change music data to be played when a proper route is set.

Images