JP2010085201A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a voice guide in a route guide in navigation function from being missed, and to hear also a music under reproduction by audio function in a natural state. <P>SOLUTION: This device is equipped with a composition partition detection means for detecting a partition of a composition reproduction by an audio reproduction means, a voice guide output point discrimination means, and a composition reproduction start control means. When the composition partition detection means detects the partition of the composition reproduced by the audio reproduction means, the voice guide output point discrimination means discriminates whether or not a guide point at which a voice guide is to be output exists in a range of a prescribed distance or time from a vehicle position corresponding to the partition of the composition, based on the vehicle position corresponding to the detected partition of the composition and guide route data. When discriminated that the guide point exists, the composition reproduction start control means starts reproduction of the next composition to be reproduced by the audio reproduction means, after detecting finish of output of the voice guide at the guide point. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a navigation device provided with an audio device, and in particular, using a plurality of speakers, music reproduction output by an audio device and voice guidance output in route guidance by a navigation function can be performed simultaneously. In the navigation device, the vehicle position at the end of each piece of music to be reproduced and output by the audio device or the vehicle position at the start of the next piece of music, and the position of the voice guidance output point (output point) in the route guidance are predetermined. The present invention relates to a navigation device that starts reproduction of the next music after the output of voice guidance is completed at the voice guidance output point when the distance or time is within the required time.

  Recently, various electronic devices such as a navigation device, a music player, a DVD player, a television receiver compatible with analog broadcasting and digital broadcasting have been miniaturized and are provided as portable devices or as in-vehicle devices. In particular, as a vehicle-mounted device, an electronic device having a combination of the various functions described above is also provided.

  For example, as disclosed in the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-130669), an in-vehicle navigation device uses map data in which a required link cost is set, and links set for each link. Based on the cost, a route that minimizes the cumulative link cost from the starting point to the destination is searched for and guided.

  In such a navigation device, a map image is displayed on the display means during route guidance, and a current position mark indicating the current position of the guidance route or the navigation device is displayed superimposed on the map image. When the vehicle (current position of the vehicle) reaches a guidance point a predetermined distance before the intersection where the traveling direction should be changed, such as a right turn or a left turn, while traveling along the guidance route, guidance (guidance by guidance) is provided. ) Is output.

  When the navigation device has an audio reproduction function, music can be listened to using the audio reproduction function while receiving route guidance by the navigation function. In this case, the voice guidance output at the guidance point in the route guidance may overlap during music reproduction. The navigation device is provided with a plurality of speakers for the audio playback function. When the audio outputs overlap, one of the speakers is used for the audio output of the route guidance, and the other speaker is used for the music playback. Configured.

  Various measures have been proposed in order to prevent the voice output (voice guidance) in route guidance from being missed when voice output for route guidance is performed during music playback. For example, in the following Patent Document 2 (Japanese Patent Laid-Open No. 2004-108908), when audio is being reproduced, the audio guidance start timing in route guidance is delayed until the end of music being reproduced by the audio device. A coordinated navigation device is disclosed.

  Further, in the following Patent Document 3 (Japanese Patent Laid-Open No. 8-105753), when a vehicle position reaches a predetermined distance to an intersection to be voice-guided, a control signal for reducing or reducing the volume to an audio device is provided. An in-vehicle route guidance system is disclosed that outputs and performs voice guidance at an intersection, and then resumes the reproduction operation by returning the volume and releasing the pause when the voice guidance is completed.

Further, in the following Patent Document 4 (Japanese Patent Laid-Open No. 2000-161977), the navigation control unit controls the guidance voice volume when the guidance voice is output, and the guidance voice level is higher by a predetermined level than the audio signal level so far. In addition, there is disclosed an audio apparatus in which an audio control unit controls an audio volume so as to have a level lower by a predetermined level than the previous audio signal.
JP 2003-130669 A JP 2004-108908 A JP-A-8-105753 JP 2000-161977 A

  In general, when listening to music using the audio playback function while receiving route guidance by the navigation function, it is possible to listen to the music being played with the audio function in a natural state without missing the voice guidance in the route guidance. Is preferred. When both cannot be satisfied, the priority is given to the user's preference, but the former (voice guidance in route guidance) is given priority to the driver of the vehicle, and the latter (audio playback output) to the passenger of the vehicle. ) Takes precedence.

  However, in the audio cooperative navigation device disclosed in Patent Document 2, when audio playback is in progress, the voice guidance start timing in the route guidance is delayed until the end of the music being played back in the audio device, so that voice guidance is output. The distance to the intersection where the vehicle position at which the vehicle should be turned right and left is shortened, and there is a problem that the lane change cannot be made in time because of the right and left turn.

  In the devices disclosed in Patent Document 3, Patent Document 4, and the like, when outputting voice guidance in route guidance, the output level of music during audio playback is attenuated or the output level is set to zero. There is a problem that the volume of the music being played is reduced or interrupted, making it impossible to listen to the music in a natural state.

  The inventor of the present application has made various studies to solve the above problems, and as a result, the vehicle position at the end of each piece of music to be reproduced and output by the audio device or the vehicle position at the start of the next piece of music, and route guidance If the position of the output point (output point) of the voice guidance is within a predetermined distance or the required time, the reproduction of the next music is completed and the output of the voice guidance is completed at the voice guidance output point. The present invention has been completed by conceiving that the above problems can be solved if it is started later.

  That is, an object of the present invention is to solve the above problems, and in a navigation device capable of simultaneously performing music reproduction output by an audio device and voice guidance output during route guidance by a navigation function, It is an object of the present invention to provide a navigation device that can listen to music being played back with an audio function in a natural state without missing the voice guidance in route guidance by function.

In order to solve the above problems, the invention according to claim 1 of the present application is
In a navigation device that searches for a route from a specified departure point to a destination and guides the route by voice guidance at each guide point set on the guide route according to the searched guide route data.
The navigation device controls audio playback means, music break detection means for detecting a music playback break by the audio playback means, voice guidance output point determination means, music playback start control means, and output of the voice guidance. Control means for
When the music segment detection unit detects a segment of music to be played back by the audio playback unit, the voice guidance output point determination unit determines the position of the vehicle and the guide route according to the detected music segment. Based on the data, it is determined whether or not there is a guidance point to which voice guidance should be output within a predetermined distance or time range from the position of the vehicle according to the music break, and it is determined that there is the guidance point In this case, the music reproduction start control means starts the reproduction of the next music reproduced by the audio reproduction means after the control means detects that the output of the voice guidance at the guidance point is completed. It is characterized by.

  The invention according to claim 2 of the present application is characterized in that, in the navigation device according to claim 1, the music segment detection means detects the end of the music being played back by the audio playback means.

  The invention according to claim 3 of the present application is the navigation device according to claim 1, wherein the music break detection means is reproduced at the end time of the music being reproduced or next, while the music reproduction is being performed by the audio reproduction means. The start time of the music to be detected is detected.

  According to a fourth aspect of the present invention, in the navigation device according to any one of the first to third aspects, the voice guidance output point discriminating means determines the position of the vehicle according to the detected music segment. And the guidance route data, it is determined whether or not there is a guidance point to which voice guidance is to be output within a predetermined distance or time range from the position of the vehicle corresponding to the music segment. If there are a plurality of detected guide points, the distance or time to the last guide point is calculated, and the music reproduction start control means at the last guide point After the control means detects that the output of the voice guidance has ended, the reproduction of the next music reproduced by the audio reproduction means is started. To.

In the invention according to claim 1, a route from the designated departure point to the destination is searched, and the route is guided by voice guidance at each guide point set on the guide route according to the searched guide route data. In the navigation apparatus, the navigation apparatus includes: an audio playback unit; a music segment detection unit that detects a segment of music playback by the audio playback unit; a voice guidance output point determination unit; a music playback start control unit; Control means for controlling the output of the guidance,
When the music segment detection unit detects a segment of music to be played back by the audio playback unit, the voice guidance output point determination unit determines the position of the vehicle and the guide route according to the detected music segment. Based on the data, it is determined whether or not there is a guidance point to which voice guidance should be output within a predetermined distance or time range from the position of the vehicle according to the music break, and it is determined that there is the guidance point In this case, the music reproduction start control means starts the reproduction of the next music reproduced by the audio reproduction means after the control means detects that the output of the voice guidance at the guidance point is completed.

  In the invention according to claim 2, in the navigation device according to claim 1, the music segment detection means detects the end of the music being played back by the audio playback means.

  According to a third aspect of the present invention, in the navigation device according to the first aspect, the music break detecting means is the end time of the music being reproduced or the start of the music to be reproduced next during the music reproduction by the audio reproducing means. Detect time.

  According to this configuration, after the end of at least one piece of music, if there is a guidance point to which voice guidance for route guidance should be output within a predetermined distance or time, after the voice guidance at that guidance point is output Since the reproduction of the next music is started, it becomes possible to listen to the music being reproduced by the audio function in a natural state without missing the voice guidance in the route guidance by the navigation function.

  According to a fourth aspect of the present invention, in the navigation device according to any one of the first to third aspects, the voice guidance output point discriminating means includes the position of the vehicle according to the detected piece break and the position of the vehicle. Based on the guide route data, it is determined whether or not there is a guide point to which voice guidance should be output within a predetermined distance or time range from the position of the vehicle corresponding to the break of the music, and there is a guide point If there are a plurality of detected guidance points, the distance or time to the last guidance point is calculated, and the music reproduction start control means is configured to provide voice guidance at the last guidance point. After the control means detects that the output of is completed, the reproduction of the next music reproduced by the audio reproduction means is started.

  According to such a configuration, when there is a guidance point that should output a plurality of voice guidances within a predetermined distance or time range from the point when the break of music is detected, the voice guidance of the last guidance point is Since the reproduction of the next music is started after the output is completed, the reproduction of the music in the audio reproducing means is not interrupted. In addition, it is possible to listen to the music being reproduced by the audio function in a natural state without missing the voice guidance in the route guidance by the navigation function.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments shown below exemplify a navigation device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this navigation device. The present invention is equally applicable to navigation devices of other embodiments included in the scope.

  FIG. 1 is a block diagram showing a configuration of a navigation device according to an embodiment of the present invention. The navigation device 1 includes a control unit 10, a current position detection unit 11, a map storage unit 12, a route search unit 13, a route guidance data editing unit 14, a voice guidance output point determination unit 15, an input unit 16, a display unit 17, and a speaker 18. , Audio playback means 19, music break detection means 20, music playback start control means 21 and the like.

  The audio reproducing means 19 is means for inserting a medium such as a mini disk (MD) or a compact disk (CD) and reproducing music (music) recorded on the medium. The audio playback means 19 is not limited to the above, and in addition to playback of MDs and CDs, the navigation device 1 receives FM broadcasts and television broadcasts, and plays the music broadcast in the broadcast program on the hard disk unit ( In the case where the recording function is provided in the HDD), in addition to the reproduction of the MD and CD, a means for reading out and reproducing the music recorded from the HDD may be provided.

  The control means 10 is a microprocessor having a ROM 101 and a RAM 102, and controls the operation of each unit by a control program stored in the ROM 101. The current position detection means 11 includes a GPS receiver, receives and processes GPS satellite signals, measures the current position (latitude / longitude) of the navigation device 1 at predetermined time intervals, and refers to map data (road data). Then, the current position on the road data is detected by performing a matching process on the position on the road closest to the current position measured. The display means 17 displays a map on a liquid crystal screen or the like with the current position as the center.

  The input unit 16 includes keys and operation buttons, and operates the menu screen (operation using a touch panel (not shown) provided in the display unit 17) or the operation buttons of the input unit 16 to start, destination, and time. Route search conditions such as conditions can be set.

  The map storage means 12 is a road including road node data (node data) and road link data (link data) in which nodes such as intersections and branching points of the roads are nodes and links between the nodes are links. Store the data. The road node data includes road node numbers, position coordinates, the number of connection links, intersection names, and the like. The road link data includes the number of road nodes as starting and ending points, road type, link length (link cost), required time, number of lanes, road width, and the like. Further, data such as bridges, tunnels, railroad crossings, and toll gates are added to the road link data as link attributes. The road type is information including a distinction between an expressway and a toll road and a distinction such as a national road or a prefectural road. The map storage means 12 further stores background data including facility data including water system data such as coastline, lake and river shape, administrative boundary data, facility location, shape, and name.

  The route search means 13 searches for the optimum route from the departure place to the destination by referring to the map data (road data) stored in the map storage means 12 when the departure place or destination is designated by the user. The guide route data is created. This search for the optimum route is carried out by linking various links and nodes from the road node corresponding to the current location or the starting point designated by the user to the road node corresponding to the destination designated by the user, such as Dijkstra method. Search by the method, accumulate link length (link cost) and required time, etc., use the route with the shortest total link length or total required time as a guide route, and use road nodes and links belonging to the route as guide route data It is to provide.

  The route guidance data editing unit 14 guides the guidance route information searched for by the route search unit 13 (node sequence, link sequence) to each intersection (node) that requires guidance for straight ahead or right / left turn before the predetermined distance. A point (voice guidance output point) is set, and guidance route data including voice guidance information at the guidance point (for example, “Turn left at the 200m00 intersection”) is edited and stored. Based on the route guidance data edited by the route guidance data editing unit 14, the control unit 10 outputs voice guidance at a guidance point using the speaker 18 according to the position of the vehicle detected by the current position detection unit 11. Guide travel along the guide route.

  The above-described components of the in-vehicle navigation device 1 are elements that a general navigation device has, and the in-vehicle navigation device 1 according to the present embodiment further includes the voice guidance output point determination unit 15 and the audio as described above. A reproduction means 19, a music segment detection means 20, and a music reproduction start control means 21 are provided.

  As described above, the navigation apparatus 1 includes the audio reproduction means 19 for inserting a medium such as a mini disk (MD) or a compact disk (CD) and reproducing music (music) recorded on the medium. The speaker 18 includes a plurality of speaker units so as to support reproduction of music recorded in stereo. A plurality of speaker units of the speaker 18 are used to output voice guidance for route guidance and to output music by the audio playback means 19.

  In the navigation device 1, when music is played back by the audio playback means 19 at the same time that the navigation function is operated, the music break detection means 20 is used to play one piece of music (music) at the time of music playback by the audio playback means 19. Detect end. When the music segment detection means 20 detects the end of music reproduction, the information is notified to the voice guidance output point determination means 15.

  When the end of music playback is notified from the music break detection means 20, the voice guidance output point determination means 15 detects the current position of the vehicle detected by the current position detection means 11 (vehicle position at the end of music playback), It is determined from the guidance route data edited by the route guidance data editing means 14 whether or not there is a guidance point to which voice guidance should be output within a predetermined distance or time from the position of the vehicle corresponding to the break of the music. When the predetermined time is used as a criterion for discrimination, the speed information of the vehicle is used and the time is converted and calculated from the distance and the vehicle speed.

  When the voice guidance output point discriminating means 15 discriminates that there is a guidance point within a predetermined distance or time based on the vehicle position at the end of the music, the music reproduction start controlling means 21 is the audio reproducing means as follows. 19 controls playback of music. That is, when the control means 10 determines the end of the voice guidance output at the guidance point and notifies the music reproduction start control means 21 of the end of the voice guidance output, the music reproduction start control means 21 receives the notification of the end, After the voice guidance output is completed, the audio playback means 19 is instructed to start playback of the next music so as to start playback of the next music.

  FIG. 2 is a schematic diagram for explaining the concept of such control. In FIG. 2, the guide route searched by the route search means 13 is indicated by the reference symbol RT. On the guide route RT, there are intersections P1 to P5 that should stabilize the left / right turn. In such a guidance route RT, the output point of the voice guidance is a predetermined point before each of the intersections P1 to P5. For example, a guidance point is set 200m before each intersection, and when the vehicle reaches that point, the traveling direction of the vehicle (right or left turn or straight travel) at the corresponding intersection is output by voice, and the vehicle is guided along the guidance route. To do.

  When the music segment detection means 20 detects the end of playback of one music being played back by the audio playback means 19, the voice guidance output point determination means 15 acquires the current position of the vehicle from the current position detection means 11, and a predetermined distance. Alternatively, it is determined whether or not there is a guide point in time. In FIG. 2, the current position of the vehicle is indicated by the reference symbol PP. For example, when there is a guidance point at the intersection P1 (a point 200 m before the intersection P1) within a predetermined distance or time range from the point PP, the control means 10 detects the end of the voice guidance output at the guidance point. After that, the music reproduction start control means 21 starts the reproduction of the next music by the audio reproduction means 19.

  By controlling in this way, after at least one piece of music ends, if there is a guidance point where the position of the vehicle corresponding to the break of the music is to output voice guidance in route guidance within a predetermined distance or time, After the voice guidance at the guidance point is output, playback of the next music is started, so the voice guidance in the route guidance by the navigation function is not missed, and the music being played by the audio function is also in a natural state You can listen to it.

  FIG. 3 is a flowchart showing an operation procedure of the navigation device 1 according to the embodiment of the present invention described above. In the navigation device 1, a route search condition such as a departure point, a destination, a departure time or a desired arrival time at the destination is designated by using the input means 16 or the like in the process of step S 101. The route search means 13 searches the optimum route from the departure point to the destination with reference to the map storage means 12 based on the route search condition specified in step S101 (step S102).

When the optimum route is searched for by the route search means 13, the route guidance data editing means 14 adds the predetermined distance to the information on the guide route searched by the route search means 13 for each intersection that requires guidance for going straight or turning left or right. A guidance point (voice guidance output point) is set in front, and guidance route data including voice guidance information at the guidance point is edited and stored (step S103). And the control means 10 starts route guidance based on guidance route data (step S104).
Next, the control means 10 determines whether or not the music is being reproduced by the audio reproducing means 19 (step S105). If playback is not in progress, the process proceeds to step S112 to determine whether or not the route guidance has ended (has reached the destination). If the route guidance has not ended, the process returns to step S105 to perform route guidance. While continuing, it is determined whether or not music is being played. If the route guidance is finished, it is determined whether or not the device is off in step S113. If the device is off, the process is terminated. If the device is not turned off, the process returns to step S101. , Wait for specification of route search conditions.

  On the other hand, in the determination process of step S105, if the audio playback means 19 determines that the music is being played back, the music break detection means 20 detects the break of the music being played back (in this case, the music playback end). (Step S106). If the end of music playback is not detected, step S106 is repeated. When the end of reproduction of the music is detected, the control means 10 determines in step S107 whether or not the device is off (OFF). If the device is off, the control unit 10 ends the processing, and the device is off. If not, the process proceeds to step S108.

  In the process of step S108, the voice guidance output point discriminating means 15 receives the music end detection notification from the music segment detecting means 20, and the current position of the vehicle detected by the current position detecting means 11 and the guide route data editing means 14 edit it. Whether or not there is a guidance point to which voice guidance is to be output within a predetermined distance or time (time is calculated from the distance and the vehicle speed) from the position of the vehicle corresponding to the break of music based on the guidance route data Is determined.

  When it is determined in step S108 that there is no guide point within the predetermined distance or time range, the music reproduction start control means 21 instructs the audio reproduction means 19 to start reproduction of the next music (step S111). The process returns to the music segment detection process in step S106. When it is determined in step S108 that the guide point is within a predetermined distance or time range, the music reproduction start control means 21 instructs the audio reproduction means 19 to hold the reproduction start of the next music (step S108). S109).

  In the process of step S109, when the music reproduction start control means 21 instructs the audio reproduction means 19 to suspend the reproduction start of the next music, the control means 10 detects whether or not the voice guidance output at the guidance point has been completed. (Step S110). If the output of the voice guidance has not ended, the control means 10 repeats the determination process in step S110.

  If it is determined in step S110 that the output of the voice guidance has been completed, the music reproduction start control means 21 instructs the audio reproduction means 19 to start reproduction of the next music (step S111), and the music break in step S106. Return to the detection process.

  After at least one piece of music has been completed by the above processing procedure, if there is a guidance point to which voice guidance for route guidance should be output within a predetermined distance or time, after the voice guidance at that guidance point is output Then, the reproduction of the next music is started. Therefore, it is possible to listen to the music being reproduced by the audio function in a natural state without missing the voice guidance in the route guidance by the navigation function.

  In the embodiment described above, the music segment detection means 20 has been described as detecting the end of one music being played back by the audio playback means 19, but the present invention is not limited to this. For example, during playback of one song, the end point (end time) of the song may be estimated, or the start point (start time) of the song to be played next to the song being played back is estimated. Also good. When the music break detection means 20 estimates the end time of the music being played or the start time of the next music to be played, the voice guidance output point determination means 15 determines the vehicle position at the estimated time (time). What is necessary is just to comprise so that it estimates using a vehicle speed and it is discriminate | determined whether there exists a guidance point within the predetermined distance or time from the position.

  By the way, if the above processing is performed each time the music segment detection means 20 detects one music segment, for example, in FIG. 2, within a predetermined distance or time range from the vehicle position corresponding to the musical segment delimiter. When there are a plurality of guide points in a predetermined range as in the case where there are three guide points corresponding to the intersections P1 to P3, the reproduction of the music in the audio reproduction means 19 is interrupted or voice guidance is provided. During the output, the output level of audio reproduction is lowered every time the voice guidance is output, and it becomes impossible to listen to music in a natural state.

  In order to prevent such inconvenience, the end of the music is detected from the music break detection means 20, and the voice guidance output point determination means 15 determines whether the current position of the vehicle and the data of the guidance route are within a predetermined distance or time. When determining whether or not there is a guidance point to which voice guidance is to be output, the voice guidance output point determination means 15 determines the number of guidance points within a predetermined distance or time and the last number within the range. The distance or time to the guidance point (for example, the guidance point corresponding to the intersection P3 in FIG. 2) may be calculated.

  When the voice guidance output point determination unit 15 determines that there are a plurality of guidance points within a predetermined distance or time range, the control unit 10 determines that the last guidance point detected (for example, at the intersection P3 in FIG. 2). The end of the voice guidance output at the corresponding guidance point) is determined, and when the end of the voice guidance output is detected, the music reproduction start control means 21 is notified. In response to this notification, the music reproduction start control means 21 instructs the audio reproduction means 19 to start the music reproduction so that the reproduction of the next music is started after the voice guidance output at the last guidance point is completed. .

  When such a process is performed, when there is a guidance point to which a plurality of voice guidance is to be output within a predetermined distance or time range from the point when the break of the music is detected, the last guidance. Since the reproduction of the next music is started after the output of the voice guidance at the point is completed, the reproduction of the music in the audio reproducing means 19 is not interrupted.

It is a figure which shows the block block diagram of the navigation apparatus concerning the Example of this invention. It is a conceptual diagram which shows an example of the voice guidance point in the route guidance of the navigation apparatus concerning the Example of this invention. It is a flowchart which shows the operation | movement procedure in the navigation apparatus concerning the Example of this invention.

Explanation of symbols

1: Navigation device 10: Control means 101 ROM
102 RAM
11: Current position detection means 12: Map storage means 13: Route search means 14: Route guidance data editing means 15: Voice guidance output point determination means 16: Input means 17: Display means 18: Speaker 19: Audio reproduction means 20: Music Break detection means 21: Music reproduction start control means

Claims (4)

In a navigation device that searches for a route from a specified departure point to a destination and guides the route by voice guidance at each guide point set on the guide route according to the searched guide route data.
The navigation device controls audio playback means, music break detection means for detecting a music playback break by the audio playback means, voice guidance output point determination means, music playback start control means, and output of the voice guidance. Control means for
When the music segment detection means detects the segment of the music to be played back by the audio playback means, the voice guidance output point determination means determines the position of the vehicle and the guide route according to the detected music segment. Based on the data, it is determined whether or not there is a guidance point to which voice guidance is to be output within a predetermined distance or time range from the position of the vehicle according to the music break. In this case, the music reproduction start control means starts the reproduction of the next music reproduced by the audio reproduction means after the control means detects that the output of the voice guidance at the guidance point is completed. A navigation device characterized by the above.   The navigation apparatus according to claim 1, wherein the music segment detection unit detects the end of the music being played back by the audio playback unit.   2. The navigation apparatus according to claim 1, wherein the music delimiter detecting means detects the end time of the music being reproduced or the start time of the music to be reproduced next while the music is being reproduced by the audio reproducing means. .   The voice guidance output point discriminating means is a predetermined distance or time range from the vehicle position corresponding to the music segment based on the vehicle position corresponding to the detected music segment and the guidance route data. It is determined whether or not there is a guidance point to which voice guidance should be output, and if there are guidance points, the number is detected, and if there are multiple detected guidance points, up to the last guidance point The music reproduction start control means calculates the next music piece to be reproduced by the audio reproduction means after the control means detects that the output of the voice guidance at the last guidance point has been completed. The navigation device according to any one of claims 1 to 3, wherein the reproduction of the video is started.

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