JP2007272986A - On-vehicle music player, and music playing method and program in the music player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle music player capable of providing an environment making it difficult for a user to be bored, and a music playing method and a program in the music player. <P>SOLUTION: This music player has a function of a car navigation device for indicating a route to a destination, detects the current position of an automobile on which the music player is mounted, extracts specific facilities present in the route from the current position to the destination, detects types of the extracted facilities, obtains music data related to the detected types of facilities from a music storage means storing the music data, and plays the selected music data when the specific facilities and the current position of the automobile satisfy predetermined conditions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an on-vehicle music playback device, and a music playback method and program in the music playback device.

  2. Description of the Related Art In recent years, an in-vehicle music reproducing apparatus that incorporates a large-capacity storage such as a hard disk and reproduces music data such as an SMF (Standard MIDI Format) format or an MP3 (MPEG-1 Audio Layer 3) format has been used. . Such a device can store music data of hundreds to thousands of songs and can reproduce the music data.

Here, a music playback device having a configuration as in Patent Document 1 has been proposed. In Patent Document 1, a large number of music data stored in a hard disk are grouped according to a predetermined rule. The user of the music playback device can selectively listen to music data belonging to a specific group. This group includes music data of music recently played on a music playback device, music data of music played by a specific player, music data of music belonging to a specific genre (rock, pop, enka, etc.), etc. Yes, it is possible for the user to appropriately set how to group them.
JP 2005-133519 A

  Thus, in the configuration of Patent Document 1, music belonging to a specific group can be selectively listened to. However, since the user selects the music that belongs to which group as appropriate, the user determines which music is played when such a playback device is used for a long period of time. It remembers to some extent and is somewhat boring for the user.

  Therefore, an object of the present invention is to provide a music playback device that can provide an environment in which a user is less likely to be bored, a music playback method using the music playback device, and a program.

  In order to explain the above problem, the music playback device of the present invention has a function as a car navigation device that shows the route to the destination to the user, and further displays the current position of the car on which the music playback device is mounted. Detects and extracts a specific facility in the route from the current position to the destination, detects the type of the extracted facility, and stores music data related to the detected facility type as music data When the specific facility and the current position of the vehicle satisfy a predetermined condition, the selected music data is reproduced from the storage means.

  According to such a configuration, when a car approaches a specific facility, for example, a destination facility or a relay point facility (for example, an interchange on a highway), music suitable for the type of the facility is played. Will be. Accordingly, it is possible to provide an environment in which unexpected music is played at an unexpected timing by the user of the music playback device, and the user is less likely to be bored. Furthermore, by playing music, the user can determine that the destination and the relay point are close.

  In order to realize the above-described configuration, for example, the music playback device has music identification information for identifying the type of music data, and a type correspondence database that stores the music identification information and the type of facility in association with each other. The music storage means stores the music data in association with the music identification information, searches the music database using the type of the extracted facility as a key, acquires the music identification information related thereto, and acquires the music identification information. Music data associated with the music identification information is acquired from the music storage means.

  As described above, according to the present invention, a music playback device capable of providing an environment in which a user is less likely to be bored, and a music playback method and program using the music playback device are provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a car navigation device with a music playback function of the present embodiment. The car navigation 1 of the present embodiment acquires the current position of the automobile and indicates the route to the automobile destination set by the user to the user. Various processes of the car navigation apparatus 1 are controlled by the controller 11. The memory 12 includes a RAM, an SRAM, a ROM, and the like, and is used as a work area used by the controller 11, a cache, a firmware storage area, or the like.

  The car navigation apparatus 1 has a monitor 42, and the controller 11 controls the signal processing means 41 that generates an image signal of an image displayed on the monitor 42, so that a desired image can be displayed on the monitor 42. it can. That is, information indicating the current position of the automobile can be displayed on the monitor 42 as image information.

  As shown in FIG. 1, the car navigation apparatus 1 has a GPS receiver 32 for receiving signals from a plurality of GPS satellites via a GPS antenna 31. The controller 11 can specify the position (latitude and longitude) of the automobile on which the car navigation device 1 is mounted, using the signal received by the GPS receiver 31. However, positioning by the GPS receiver 32 and self-contained navigation may be used in combination in order to improve the accuracy of specifying the vehicle position.

  In the self-contained navigation, the direction and speed of the car (that is, the speed vector of the car) are acquired every predetermined time (for example, every several tens of milliseconds), and the speed vector after the position acquisition of the car using the GPS receiver 32 is obtained in time. By integrating, it is estimated how much the automobile is moving from the time when the position of the automobile is acquired by GPS.

  The speed of the automobile is calculated from output pulses of an encoder provided on the axle of the automobile. That is, the output pulse of the encoder is transmitted to the speed sensor 33, and the speed sensor 33 measures the time between the pulses, and calculates the speed of the automobile based on the measurement result. For example, in a configuration in which a pulse is output for each revolution of the axle, a value obtained by dividing the circumference of the tire of the automobile by the pulse interval is the speed of the automobile. The calculated speed is transmitted to the controller 11 of the car navigation apparatus 1.

  Further, the direction of the vehicle is calculated based on the angular velocity of the vehicle measured by the gyroscope 34 built in the car navigation device 1. That is, the angular velocity output from the gyroscope 34 is periodically sent to the controller 11, and the controller calculates the relative direction of the vehicle with respect to the reference direction by integrating the angular velocity with time. Here, the reference azimuth is calculated from the absolute position of the vehicle measured using the GPS receiver 32 at two locations, and the angular velocity and the speed change when the vehicle moves between the two locations. In the present embodiment, the current position of the vehicle is always acquired by using the GPS receiver 32 or self-contained navigation.

  The speed vector of the automobile is calculated from the speed and direction of the automobile acquired in this way. When performing self-contained navigation, the controller 11 acquires the displacement of the automobile as a vector quantity by integrating the speed vector with time. By adding this displacement vector to the position vector of the absolute position of the automobile measured last time, the current position of the automobile can be acquired.

  The car navigation apparatus 1 includes a hard disk 13. The hard disk 13 stores map information data. The controller 11 appropriately reads out the map information data based on the current position of the vehicle obtained by using the GPS receiver 32 or the self-contained navigation, and displays a map around the vehicle on the monitor 42. As a result, the user can grasp the current position of the car.

  The surface of the monitor 42 is a touch sensor 43, and the user can input various information by touching the touch sensor 43. For example, it is possible to input a destination of an automobile and cause the car navigation device 1 to search for a route from the current position to the destination. At this time, a specific relay point (for example, a restaurant that the user wants to drop in on the way to the destination) can be set together with the destination.

  The hard disk 13 stores road information data in which road coordinates are recorded. The controller 11 refers to the road information data and calculates a route from the current position to the destination. The calculated route is presented to the user, for example, by highlighting the road on which the car should travel on a map displayed on the monitor 42.

  The car navigation apparatus 1 according to the present embodiment temporarily converts the digital music data recorded on the audio CD into MP3 format digital music data and stores it in the hard disk 13. The stored music data is appropriately read from the hard disk and output from the speaker 24 as music.

  The music data recorded on the audio CD is read by the CD drive 21, encoded into an MP3 format music data file by the DSP 22, and stored in the hard disk 15. When playing back an MP3 format music data file as music, the music data 15 is read from the hard disk 15 and transferred to a DSP (Digital Signal Processor) 22. The DSP 22 decodes the MP3 format music data file into non-compressed digital music data and transmits it to the D / A converter 23. The D / A converter 23 converts the digital music data into analog music data and sends it to the speaker 24. As a result, music is reproduced from the speaker 24. These operations are performed by the controller 11 controlling the CD drive 21, DSP 22, HDD 13, and the like.

  Here, when the music data is encoded into the MP3 format, the controller 11 acquires information (song title, player name, etc.) related to the music data and stores it as music information data. When reproducing the music data file, the controller 11 acquires the corresponding music information data. By displaying a part of the music information data on the monitor 42, the user of the car navigation device 1 can confirm the name of the song being played and the name of the performer.

  The format of the music information data is shown in FIG. In the present embodiment, the music information data is formed for each audio CD before encoding. At the beginning of the music information data, the TOC (Table of Contents) information of the audio CD, the title of the audio CD, the name of the performer, and the number of songs (corresponding to individual music data files) recorded on the audio CD are recorded. Headers are provided. The TOC information is a kind of identification code recorded in the header portion of the audio CD, and is unique information for each audio CD.

  Further, after this header, a song data storage area in which song information data, which is information related to each song, is recorded is formed in the order of the songs. Each song data storage area has a song ID for identifying the song, a song name, one or more type information used in the music selection function described later, and an MP3 format music data file corresponding to this song The file name is stored.

  The type information is information indicating the characteristics of the song, such as the genre (rock, pop, enka, nursery rhyme, etc.), tempo (whether it is a slow song, etc.), tone (light or dark song) of this song.

  Of the above music information data, those other than the file name of the music data file are obtained by obtaining the TOC information of this CD when encoding the music of the audio CD, and searching the music database using this TOC information. To be acquired. The music information data is created by adding the file name of the music data file to the acquired information. The music database is operated by the controller 11 processing a large number of music information data groups (not including file names) stored in the hard disk 13.

  The music information data group used by the music database is recorded in the hard disk 13 when the car navigation device 1 is shipped from the factory, but can be updated later by the user of the car navigation device 1. For example, the music information data group can be updated using the update data included in the FM data broadcast received by the FM broadcast receiving unit 52 via the FM receiving antenna 51 (FIG. 1).

  Next, the music selection function in this embodiment will be described. The music selection function according to the present embodiment is a state in which a destination of a car is input to the car navigation apparatus 1 and a route to the destination is acquired. Etc.), music corresponding to the type of destination or relay point facility is played.

  In the present embodiment, facility information data including names of major facilities, positions of the facilities, and type information of the facilities is stored in the hard disk 13. An example of the facility information data is shown in FIG. As shown in FIG. 3, for example, when the facility is “Ueno Park”, the type information is “park”. When the facility is an amusement park, the identification information is “amusement park”.

  In this embodiment, the hard disk 13 stores a type correspondence table in which the facility type information in the facility information data in FIG. 3 and the song type information in the music information data in FIG. An example of the type correspondence table is shown in FIG. The type correspondence table is composed of three items of “facility type”, “priority”, and “song type”. In this embodiment, “song type” is a combination of three items of “song genre”, “song tempo”, and “song tone”, but the present invention is not limited to this configuration. .

  The item “type of facility” corresponds to the type of facility information in the facility information data of FIG. The item “song type” corresponds to the song type information in the music information data of FIG. By referring to the music information data, the facility information data, and the type correspondence table, a song corresponding to a certain facility can be extracted. For example, regarding the facility “Ueno Park” (FIG. 3), it can be seen that the type of the facility is “park” from the facility information data (FIG. 3). Then, from the type correspondence table (FIG. 4), “genre: pops, tempo: slow, tune: bright” has the priority 1 as the type of music corresponding to the facility type “park”, “genre: pops, It can be seen that “tempo: unquestioned, tune tone: unquestioned” has a priority of 2, and “genre: nursery rhyme, tempo: unquestioned, tune: unquestioned” has a priority of 3. Furthermore, the file name of the music data corresponding to this song type can be obtained by referring to the music information data. Here, the item “priority” in the type correspondence table is the priority of the type of music corresponding to the type of facility. In other words, if music data corresponding to a song type of priority 1 is recorded on the hard disk 13, music of that song type has a lower priority (ie, a higher number of the item “priority”) if there is no music data. Data is extracted.

  Using the facility information data as shown in FIG. 3, the controller 11 aims at the vicinity of the current vehicle position (for example, a position within a radius of 500 meters or reachable within 10 minutes). It is possible to determine whether there is a ground or relay point facility. The relay point may be designated by the user (for example, a specific restaurant) during route search, or an expressway interchange or the like may be automatically registered as a relay point. If the destination or relay point facility is in the vicinity of the car, the controller 11 refers to the music information data, the facility information data, and the type correspondence table, extracts music data suitable for the type of facility from the hard disk, Play. When there are a plurality of music data suitable for the type of facility, for example, music data to be reproduced at random is selected from the plurality of music data.

  As described above, the car navigation apparatus 1 according to the present embodiment can play music according to the type at a relay point or a destination facility in the vicinity of the automobile. Specifically, the above function is realized by the controller 11 executing the routine shown in the flowchart of FIG. The routine of FIG. 5 is executed after the user operates the touch panel 43 to calculate a route for a certain destination.

  When this routine starts, step S1 is executed. In step S1, the relay point or destination facility ID (FIG. 3) set by the user or automatically set during the route search is extracted. Next, the process proceeds to step S2.

  In step S2, the controller 11 compares the position of the own vehicle obtained by the GPS receiver 32 or self-contained navigation with the position of the destination or relay point extracted in step S1, and the car is near the destination or relay point. A determination is made as to whether or not Whether the car is near the destination or the relay point is determined whether the distance between the host vehicle and the destination / relay point (straight distance or road) falls below a predetermined threshold (for example, 500 meters), or And the time from the position of the destination / relay point to the time when the vehicle reaches the destination / relay point is estimated, and whether the time has fallen below a predetermined threshold (for example, 10 minutes) is determined. If it is determined that the vehicle is near the destination or the relay point (S2: YES), the process proceeds to step S3. When it is determined that the vehicle is not near the destination or the relay point (S2: NO), step S2 is continuously executed. That is, step S2 is a routine that waits until the vehicle approaches the destination or relay point.

  In step S3, the controller 11 acquires the type of the facility at the destination or relay point near the host vehicle with reference to the facility information data (FIG. 3). Next, the process proceeds to step S4.

  In step S4, the controller 11 acquires the type of music corresponding to the type of facility acquired in step S3 with reference to the type correspondence table (FIG. 4). Next, the process proceeds to step S5.

  In step S5, the controller 11 acquires the file name of the music data file that matches the music type acquired in step S4 with reference to the music information data (FIG. 2). As described above, music data that matches the type of music having a high priority is preferentially selected. If there are a plurality of music data files that match the type of music acquired in step S4, one music data file is extracted based on a predetermined criterion (for example, random). Next, the process proceeds to step S6.

  In step S6, the music data file extracted in step S5 is read from the hard disk 13 and reproduced. Next, the process proceeds to step S7.

  In step S7, it is determined whether the facility determined to be near the vehicle in the immediately preceding step S2 is a destination facility or a relay point facility. If the facility near the vehicle is a relay point facility, it means that there are still facilities that pass or arrive. Therefore, in this case (S7: NO), the process returns to step S2. On the other hand, if the facility near the host vehicle is the destination facility, it means that there is no facility passing or arriving any more. Therefore, in this case (S7: YES), this routine is terminated.

  As described above, the music selection function of the present embodiment is executed by executing this routine.

1 is a block diagram of a car navigation device with a music playback function according to an embodiment of the present invention. It is the schematic of the memory map of the music information data used by embodiment of this invention. It is an example of the table of the facility information data used in the embodiment of the present invention. It is an example of the classification | category corresponding | compatible table used by embodiment of this invention. It is a flowchart of a routine used for selection of music in the car navigation device with music playback function according to the embodiment of the present invention.

Explanation of symbols

1 Car navigation device 11 Controller 12 Memory 13 Hard disk 21 CD drive 22 DSP
23 D / A converter 24 Speaker 31 GPS antenna 32 GPS receiver 33 Speed sensor 34 Gyroscope 41 Signal processing means 42 Monitor 43 Touch sensor 51 FM receiving antenna 52 FM broadcast receiving unit

Claims (15)

An in-vehicle music playback device having a function as a car navigation device showing a route to a destination to a user,
Position acquisition means for detecting a current position of a car on which the music playback device is mounted;
Facility extraction means for extracting a specific facility in the route from the current position to the destination;
Facility type detection means for detecting the type of the facility extracted by the facility extraction means;
Music storage means for storing music data;
Music selection means for acquiring music data related to the type of facility detected by the facility type detection means from the music storage means;
Music reproduction for reproducing the music data selected by the music selection means when the specific facility extracted by the facility extraction means and the current position of the vehicle detected by the position acquisition means satisfy a predetermined condition Means,
A music playback device.   The music reproducing apparatus according to claim 1, wherein the specific facility is a facility at the destination. Further comprising distance calculation means for calculating the distance to the current position of the vehicle to the position of the specific facility based on the detection result of the position acquisition means;
3. The music reproducing apparatus according to claim 1, wherein the predetermined condition is that the distance calculated by the distance calculating unit is shorter than the predetermined distance. An arrival time estimation means for estimating a time until the vehicle reaches the specific position based on a detection result of the position acquisition means;
3. The music reproducing apparatus according to claim 1, wherein the predetermined condition is that a time calculated by the arrival time estimating means is smaller than a predetermined time. Music type information for identifying the type of music corresponding to the music data, and a type correspondence database for storing the music type information and the type of facility in association with each other;
The music storage means stores the music data in association with the music type information,
The music selection unit searches the type correspondence database using the detection result of the facility type detection unit as a key, acquires music type information related to the detection result of the facility type detection unit, and the acquired music type information Obtaining music data associated with the music storage means;
The music playback device according to claim 1, wherein: A music playback method for playing music in a music playback device having a function as a car navigation device showing a route to a destination to a user,
A position acquisition step of detecting the current position of the car equipped with the music playback device;
A facility extraction step for extracting a specific facility in the route from the current position to the destination;
A facility type detection step for detecting the type of the facility extracted by the facility extraction step;
A music selection step of acquiring music data related to the type of facility detected by the facility type detection step from a music storage means storing the music data;
Music reproduction for reproducing the music data selected by the music selection step when the specific facility extracted by the facility extraction step and the current position of the vehicle detected by the location acquisition step satisfy a predetermined condition A music playback method comprising:   The music reproducing method according to claim 6, wherein the specific facility is a facility at the destination. A distance calculating step of calculating a distance to the current position of the vehicle to the position of the specific facility based on the detection result of the position acquiring step;
8. The music reproducing method according to claim 6, wherein the predetermined condition is that the distance calculated by the distance calculating step is shorter than the predetermined distance. An arrival time estimation step for estimating a time until the vehicle reaches the specific position based on a detection result of the position acquisition step;
The music playback method according to claim 6 or 7, wherein the predetermined condition is that the time calculated by the arrival time estimation step is smaller than a predetermined time. The music playback device has music identification information for identifying the type of music data, a type correspondence database for storing the music identification information and the type of facility in association with each other,
The music storage means stores the music data in association with the music identification information,
The music selection step searches the music database using the detection result of the facility type detection step as a key, acquires music identification information related to the detection result of the facility type detection step, and adds the music identification information to the acquired music identification information. Obtaining associated music data from the music storage means;
The music playback method according to claim 6, wherein: A music playback program for playing music in a music playback device having a function as a car navigation device showing a route to a destination to a user,
A position acquisition step of detecting the current position of the car equipped with the music playback device;
A facility extraction step for extracting a specific facility in the route from the current position to the destination;
A facility type detection step for detecting the type of the facility extracted by the facility extraction step;
A music selection step of acquiring music data related to the type of facility detected by the facility type detection step from a music storage means storing the music data;
Music reproduction for reproducing the music data selected by the music selection step when the specific facility extracted by the facility extraction step and the current position of the vehicle detected by the location acquisition step satisfy a predetermined condition A music playback program comprising steps.   12. The music playback program according to claim 11, wherein the specific facility is a facility at the destination. A distance calculating step of calculating a distance to the current position of the vehicle to the position of the specific facility based on the detection result of the position acquiring step;
The music reproducing program according to claim 11 or 12, wherein the predetermined condition is that the distance calculated by the distance calculating step is shorter than the predetermined distance. An arrival time estimation step for estimating a time until the vehicle reaches the specific position based on a detection result of the position acquisition step;
13. The music playback program according to claim 11, wherein the predetermined condition is that the time calculated by the arrival time estimation step is smaller than a predetermined time. The music playback device has music identification information for identifying the type of music data, a type correspondence database for storing the music identification information and the type of facility in association with each other,
The music storage means stores the music data in association with the music identification information,
The music selection step searches the music database using the detection result of the facility type detection step as a key, acquires music identification information related to the detection result of the facility type detection step, and adds the music identification information to the acquired music identification information. Obtaining associated music data from the music storage means;
The music reproduction program according to claim 11, wherein:

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