JP4230346B2 - Car music server circuit and car information terminal - Google Patents

Description

  The present invention relates to an in-vehicle information terminal having a vehicle navigation function and a function of recording music data on a hard disk and reproducing and outputting it as necessary.

  In addition to a navigation function for guiding a vehicle to a destination, an in-vehicle navigation device having a function of capturing music data from a music CD, recording it on a hard disk (HDD), and reproducing and outputting it as necessary is known. (Non-Patent Document 1).

JPO Standard Technology Collection “Car Navigation Device User Interface” Main Category 6-C-1a

  In the apparatus disclosed in Non-Patent Document 1, in order to perform the navigation process and the process of recording the music CD on the HDD at the same time, the processing load of the processor increases as compared with the execution of the normal navigation process. There is a need for a capable processor. Further, in recent years, in order to prevent unlimited duplication of music data from the viewpoint of protecting the copyright of music CDs, it has been demanded that the music data be encrypted and then recorded on the HDD. In order to satisfy this demand, it is necessary to perform processing for encrypting music data at the time of recording on the HDD, which further increases the processing load on the processor. For this reason, in an in-vehicle information terminal having a navigation function and a function of recording a music CD in the HDD as in the device disclosed in Non-Patent Document 1, it is difficult to execute these two functions simultaneously. Yes.

An in-vehicle music server circuit according to a first aspect of the present invention includes an in-vehicle navigation circuit that performs navigation processing for guiding a vehicle to a destination based on map data, and music data that acquires music data obtained by converting music and voice into data. Control means for outputting a ripping command signal for controlling either the music data acquisition means or the recording means, connected to the acquisition means and the recording means on which the map data is recorded and the data can be written ; A first switching state in which the ripping command signal output from the means is output to the music data acquisition means or the recording means, and a second switching state in which the navigation command signal output from the in- vehicle navigation circuit is output to the recording means. Command signal switching means and ripping frame A third switching state in which music data output from the music data acquisition means in response to the recording signal is output to the recording means, and map data output from the recording means in response to the navigation command signal is output to the in-vehicle navigation circuit. Data switching means for switching to the fourth switching state is provided.
The invention of claim 2 controls the ripping command signal when the command signal switching means is in the first switching state and the data switching means is in the third switching state in the in-vehicle music server circuit of claim 1. The music data output from the music data acquisition means is written into the recording means by controlling the recording means by outputting from the means to the recording means.
According to a third aspect of the present invention, in the in-vehicle music server circuit according to the second aspect , the music data output from the music data acquisition means is encrypted, and the release key for releasing the encrypted music data is encrypted. Is written in the recording means together with the music data.
According to a fourth aspect of the present invention, in the in-vehicle music server circuit according to the third aspect , the release key and the encrypted music data written in the recording means are read from the recording means, and the music data is decrypted and reproduced. To output an audio signal.
An in- vehicle information terminal according to a fifth aspect of the invention includes the in-vehicle music server circuit according to any one of the first to fourth aspects, an in- vehicle navigation circuit , a music data acquisition unit, and a recording unit .
According to a sixth aspect of the present invention, in the in-vehicle information terminal of the fifth aspect , a map is displayed based on the map data, and a display for displaying that the music data read by the music data acquisition means is written to the recording means Means are further provided.

  According to the in-vehicle music server circuit of the present invention, the music data acquired by the music data acquisition unit is written to the recording unit, and a signal for controlling the recording unit output from the in-vehicle navigation circuit is received and output to the recording unit. In response to the signal, the map data output from the recording means is received and output to the in-vehicle navigation circuit. Since it did in this way, while performing a navigation process in a vehicle-mounted navigation circuit, the process which writes music data to a recording means simultaneously can be performed in a vehicle-mounted music server circuit. Therefore, when applied to an in-vehicle navigation device having a navigation function and a function of recording music data acquired from a music CD in the HDD, the navigation function and the music CD can be easily transferred to the HDD without increasing the processing load of the processor. It is possible to execute the function of recording in the same time.

  FIG. 1 shows a configuration of an in-vehicle navigation device with a music server function according to an embodiment of the present invention. This navigation device (hereinafter referred to as “this device”) 1 takes in music data from a music CD in addition to a navigation function for displaying a recommended route from the departure point to the destination on a map and guiding the vehicle to the destination. It has a function of recording and reproducing as necessary (referred to as a music server function). As shown in FIG. 1, the apparatus 1 includes a navigation unit 10, a music server unit 11, a monitor 12, an HDD 13, and a CD / DVD drive 14. The music server unit 11 is connected to an audio device 2 for outputting a sound signal to a speaker (not shown) to output sound.

  The navigation unit 10 detects the current location of the host vehicle based on a calculation processing unit 101 configured using a microprocessor, a ROM, a RAM, and the like, a GPS signal received from a GPS satellite, a detection result of a motion state of the host vehicle, and the like. A current location detection unit 102 and an input operation unit 103 for receiving a request input from the user. When the destination is set by the user via the input operation unit 103, the current location is detected by the current location detection unit 102, the map data recorded in the HDD 13 is read using the arithmetic processing unit 101, and known navigation processing is performed. I do. In this way, the navigation unit 10 obtains a recommended route from the current location to the destination, and displays the map on the monitor 12 to guide the vehicle to the destination, thereby realizing the navigation function of the device 1. At this time, a signal for controlling the operation of the HDD 13 is output from the navigation unit 10 to the HDD 13 via the music server unit 11. This signal is referred to as a command signal in the following description.

  Thus, by operating the input operation unit 103 and setting the destination, the user can request the apparatus 1 to execute the navigation function. Furthermore, the user can request the apparatus 1 to execute a music server function such as recording and reproduction of music data by operating the input operation unit 103. When a request for the music server function is input from the user, the navigation unit 10 notifies the music server unit 11 of the request content. As the input operation unit 103, for example, a touch panel integrated with the monitor 12 or a remote control can be used.

  The music server unit 11 executes processing of the music server function in accordance with the content requested by the user notified from the navigation unit 10. When recording music data, the HDD 13 and the CD / DVD drive 14 are controlled to read music data from the music CD and write it to the HDD 13. Such a process is called ripping. When performing music reproduction, either the HDD 13 or the CD / DVD drive 14 is controlled to read music data, execute reproduction processing, and output an audio signal to the audio device 2. In music reproduction, either music data recorded on the HDD 13 by the above-described ripping process or music data recorded on a music CD set in the CD / DVD drive 14 can be reproduced. A ripping process can be performed in parallel with the reproduction of the music CD.

  When the music server unit 11 executes processing of the music server function as described above, a command signal is output to the HDD 13 or the CD / DVD drive 14. This is the same as the command signal output from the navigation unit 10 described above, and is used to control the HDD 13 and the CD / DVD drive 14. That is, the operation of the HDD 13 and the CD / DVD drive 14 is controlled by the navigation unit 10 or the music server unit 11 by this command signal, and data is read or written.

  As described above, it is preferable to use a signal conforming to the IDE / ATAPI standard widely used in personal computers as the command signal used for controlling the HDD 13 and the CD / DVD drive 14. When this signal is used, two different types of drives such as an HDD and a CD / DVD drive can be controlled respectively, which is suitable as the command signal. At this time, one drive to be controlled is set as a master, and the other drive is set as a slave.

  The monitor 12 is a display monitor using a liquid crystal display or the like, and the display content is controlled by the navigation unit 10 to provide various image displays to the user. FIG. 6 is a diagram illustrating a display screen example of the monitor 12 when ripping is performed during the execution of the navigation function. In FIG. 6, a display icon 21 indicating that ripping is being performed and a display bar 22 indicating the song title, track number, song playback time, album name, and artist name are superimposed on a map display screen. It is displayed. Note that FIG. 6 is an example of a display indicating that ripping is being performed, and the content to be displayed is not limited to that of FIG. 6 as long as the user can be shown that ripping is being performed.

  The HDD 13 is a recording device that uses a magnetic hard disk as a recording medium, and stores map data and the like necessary for navigation processing. Further, as described above, the music server unit 11 performs the ripping process so that music data taken from the music CD is written. These data written in the HDD 13 are read out under the control of the navigation unit 10 or the music server unit 11.

  The CD / DVD drive 14 is a device that reads music data recorded on a set music CD. The music data read by the CD / DVD drive 14 is output to the music server unit 11, a reproduction process is performed, and an audio signal is output to the audio device 2. Further, the music data can be written to the HDD 13 by ripping processing. Note that the CD / DVD drive 14 can also read data recorded on a CD-ROM or DVD-ROM other than a music CD, for example, update map data, an upgrade program for the navigation unit 10, and the like. These data other than music data are output to the navigation unit 10 or the HDD 13 via the music server unit 11.

  The functional block of the music server unit 11 is shown in FIG. The music server unit 11 includes functional blocks of a command receiving unit 110, a command switching unit 111, a data switching unit 112, a control unit 113, and a music data processing unit 114. In FIG. 2, the flow of various signals input / output between the functional blocks is represented by arrows, and the line type of the arrows is changed as follows depending on the type of the signals. That is, the solid line and white arrows represent command signals and data, respectively, and the broken arrows represent other signals. Each of these functional blocks will be described below.

  The command receiving unit 110 receives a command signal output from the navigation unit 10 for controlling the HDD 13. When the command switching unit 111 is switched to the navigation unit 10 side as will be described later, the command signal is output to the command switching unit 111. On the other hand, when the switch is made to the music server unit 11 side, the command signal is not output to the command switching unit 111. At this time, a command signal for reply indicating that the HDD 13 is busy is output from the command receiving unit 110 to the navigation unit 10. Receiving this, the navigation unit 10 waits until the HDD 13 becomes accessible. Note that the command receiving unit 110 determines the switching state of the command switching unit 111 based on the control signal output from the control unit 113. This control signal will be described later.

  The command switching unit 111 switches the input / output destination of the command signal. By this switching, a command signal output from either the navigation unit 10 or the music server unit 11 is output to the HDD 13 or the CD / DVD drive 14. In response to this, a reply command signal output from the HDD 13 or the CD / DVD drive 14 is output to either the navigation unit 10 or the music server unit 11. Here, the navigation unit 10 inputs / outputs command signals via the command receiving unit 110 as described above, and the music server unit 11 inputs / outputs command signals by the control unit 113 as described later.

  The command switching unit 111 is switched by a state transition of a control signal output from the control unit 113. For example, the command switching unit 111 can be switched as follows as the control signal transitions to an on / off state. When the music server unit 11 does not issue a command signal, the control signal from the control unit 113 is turned off, and the command switching unit 111 is switched to the navigation unit 10 side. Thus, command signals are input / output between the navigation unit 10 and the HDD 13 when performing navigation processing.

  When the music server unit 11 issues a command signal, the control signal from the control unit 113 is turned on, and the command switching unit 111 is switched to the control unit 113 side. In this case, command signals are input / output between the control unit 113 and the HDD 13 or the CD / DVD drive 14, and the control unit 113 controls the HDD 13 and the CD / DVD drive 14. As described above, when processing of the music server function is performed, a command signal is input / output between the music server unit 11 and the HDD 13 or the CD / DVD drive 14. In addition, by changing the state of the control signal in this way, the command receiving unit 110 can determine the switching state of the command switching unit 111 as described above.

  The data switching unit 112 switches the data input / output destination. When the input / output destination is switched by the data switching unit 112, processing according to the type of the data can be performed. For example, when map data is read from the HDD 13, navigation processing can be performed by outputting the map data to the navigation unit 10. On the other hand, when music data is read from the HDD 13, the music data is output to the music data processing unit 114, so that music playback processing can be performed as described later.

  Switching of the data switching unit 112 is performed by a state transition of a control signal output from the control unit 113, similarly to the command switching unit 111. The number of control signal states at this time is set according to the number of switching states of the data switching unit 112. For example, if there are four types of switching states of the data switching unit 112, the control signal causes the control unit 113 to transition to any of the four types of states. Then, in accordance with the state of this control signal, the data switching unit 112 switches the data input / output destination. The switching of the data input / output destination will be described later in correspondence with specific processing contents using FIGS.

  As described above, the control unit 113 outputs a command signal and outputs control signals to the command switching unit 111 and the data switching unit 112. In addition to this, the playback history is updated during the music playback process, and the song title and title name are searched during the ripping process. Note that the song title and title name are determined by the contents of the music data read from the music CD, details of which will be described later.

  The music data processing unit 114 performs reproduction processing of music data output from the data switching unit 112 from the HDD 13 or the CD / DVD drive 14 and outputs an audio signal to the audio device 2. In the ripping process, the music data read from the CD / DVD drive 14 is compressed and encrypted, and then the music data is written to the HDD 13 via the data switching unit 112.

  The music server unit 11 relays command signals and data between the navigation unit 10 and the HDD 13 during navigation processing, and performs music playback processing and ripping processing using the functional blocks described above. 3, 4 and 5 show signals input and output by the music server unit 11 when the navigation process, the music playback process and the ripping process are executed in the apparatus 1. 3 to 5 show only the signals related to the processing to be executed among the signals shown in FIG. 2, and other signals are omitted. Hereinafter, these figures will be described in order.

  FIG. 3 is a diagram illustrating input / output signals between the functional blocks of the music server unit 11 when the navigation process is executed. At this time, the navigation unit 10 notifies the control unit 113 that the navigation process is to be executed. Then, the control unit 113 switches between the command switching unit 111 and the data switching unit 112 by changing the state of the control signal so that the command signal and data are input / output between the navigation unit 10 and the HDD 13. . Thereafter, when a command signal specifying map data to be read from the HDD 13 is output from the navigation unit 10 to the command switching unit 111 via the command receiving unit 110, the command signal is output from the navigation unit 10 to the HDD 13 and specified. Map data is read from the HDD 13.

  The map data read from the HDD 13 is output to the data switching unit 112. As described above, since the data switching unit 112 is switched so that data is input and output between the HDD 13 and the navigation unit 10, the map data read from the HDD 13 is transmitted via the data switching unit 112 to the navigation unit. 10 is output. The map data specified in this way is output to the navigation unit 10, and navigation processing is performed in the navigation unit 10 based on the map data. At this time, point registration data or the like can be written from the navigation unit 10 to the HDD 13.

  FIG. 4 is a diagram illustrating input / output signals between the functional blocks of the music server unit 11 during music playback processing. Here, a process of reading and playing music data stored in the HDD 13 will be described. The process of reading from the music CD and playing it will be described together with the ripping process of FIG. When a music playback request is made by the user, the navigation unit 10 reads the song name and album name information from the HDD 13 and outputs the music playback request to the control unit 113 together with the song name and album name information.

  When a request for music playback is notified from the navigation unit 10, the control unit 113 switches between the command switching unit 111 and the data switching unit 112 by changing the state of the control signal. At this time, a command signal is input / output between the control unit 113 and the HDD 13 for the command switching unit 111, and data is transmitted between the HDD 13 and the music data processing unit 114 for the data switching unit 112. To be input and output. After that, based on the song name and album name information from the navigation unit 10, a command signal designating music data to be read from the HDD 13 is output from the control unit 113 to the command switching unit 111. Thereby, the designated music data is read from the HDD 13.

  The music data read from the HDD 13 is output to the data switching unit 112 and then output to the music data processing unit 114. Thus, the music data requested to be played back by the user is output to the music data processing unit 114. As will be described later with reference to FIG. 5, this music data is subjected to compression processing and encryption processing at the time of ripping. Therefore, the music data processing unit 114 performs a descrambling process for decrypting the music data and a decompression process for enabling the compressed music data to be reproduced, and then performs a reproduction process to convert the audio signal into the audio device. Output to 2. In this way, music playback processing is performed. If the reproduction history for each music data is recorded in the HDD 13 at this time, the user can select a favorite song with reference to the reproduction history. The reproduction history is updated by the reproduction history data output from the control unit 113 to the HDD 13 via the data switching unit 112.

  FIG. 5 is a diagram illustrating input / output signals between the functional blocks of the music server unit 11 during the ripping process. Here, a process of writing music data to the HDD 13 while reproducing music data read from a music CD set in the CD / DVD drive 14 will be described. When a ripping request is made from the user, the navigation unit 10 notifies the control unit 113 of the ripping request together with the track number of the music CD on which the music data to be ripped is recorded. It should be noted that all the music data in the music CD can be the target of ripping.

  When the ripping request is notified from the navigation unit 10, the control unit 113 changes the state of the control signal and switches between the command switching unit 111 and the data switching unit 112. At this time, a command signal is output between the control unit 113 and the CD / DVD drive 14 for the command switching unit 111, and the CD / DVD drive 14 and the music data processing are performed for the data switching unit 112. Data is input to and output from the unit 114. Thereafter, based on the track number information from the navigation unit 10, a command signal designating music data to be read from the CD / DVD drive 14 is output from the control unit 13 to the command switching unit 111. As a result, the designated music data is read from the CD / DVD drive 14.

  The music data read from the CD / DVD drive 14 is output to the data switching unit 112 and then output to the music data processing unit 114. Thus, the music data requested to be ripped by the user is output to the music data processing unit 114. The music data processing unit 114 performs reproduction processing of the music data and outputs an audio signal to the audio device 2. Thereby, the music data of the music CD is reproduced. In the ripping process, the music data is further compressed and encrypted, and then written to the HDD 13. The compression process is intended to reduce the amount of music data, and the encryption process is performed to prevent unlimited duplication of music data from the viewpoint of copyright protection.

  Various methods for compressing music data are known, and all of them reduce the amount of data so that the original sound quality before compression is not significantly impaired when listening. The compressed music data can be played back by performing a decompression process corresponding to the compression method. Various methods are also known for the encryption process. Here, a method of using specific data called a release key for the descrambling process is adopted. Since the encrypted music data cannot be reproduced without this release key, managing the copy of the release key can prevent the music data recorded on the HDD 13 from being copied without limitation. A specific encryption processing method may be used corresponding to the compression processing method.

  When the music data processing unit 114 performs compression processing and encryption processing of music data, the music data processing unit 114 outputs TOC (Table Of Contents) data included therein to the control unit 113. This TOC data represents information unique to the music CD such as track information of the music CD. Here, if the TOC data of various music CDs and the song titles and title names of the music CDs are stored in a database in advance, the control unit 113 performs music based on the TOC data output from the music data processing unit 114. CD song names and title names can be searched. If the song name and title name can be searched, the contents are output from the control unit 113 to the data switching unit 112.

  When the music data processing unit 114 performs compression and encryption processing of music data, the control unit 113 switches between the command switching unit 111 and the data switching unit 112, and the connection destination of the command switching unit 111 and the data switching unit 112 is switched. One is switched from the previous CD / DVD drive 14 to the HDD 13. Thereafter, the controller 13 controls the HDD 13 to write the compressed and encrypted music data to the HDD 13. At this time, a release key for releasing encryption is also recorded in the HDD 13. Furthermore, the song name and title name searched as described above can be written together. In this way, the ripping process is performed.

  In addition, by controlling the switching timing of the command switching unit 111 and the data switching unit 112 in the control unit 113, the navigation process, the music reproduction process, and the ripping process described above can be simultaneously performed in parallel. In that case, the navigation unit 10 and the music server unit 11 alternately output command signals to the HDD 13 or the CD / DVD drive 14 according to the timing at which the command switching unit 111 is switched, and control them. The timing at which the navigation unit 10 controls the HDD 13 at this time can be controlled by switching the input / output of the command signal to the command switching unit 111 in the command receiving unit 110 as described above.

According to the embodiment described above, the following operational effects can be obtained.
(1) The music server unit 11 performs a ripping process for writing music data acquired from the music CD by the CD / DVD drive 14 to the HDD 13. Further, by switching between the command switching unit 111 and the data switching unit 112, the command signal output from the navigation unit 10 is output from the command switching unit 111 to the HDD 13, and the map data output from the HDD 13 according to the command signal is output. The data switching unit 112 outputs to the navigation unit 10. Since it did in this way, a navigation process and a ripping process can be performed simultaneously by another unit. Therefore, the navigation function and the function of recording the music CD on the HDD can be easily executed simultaneously without increasing the processing load on the processor. Further, by using such a music server unit, a music server function can be easily added to an existing navigation unit.

(2) The command switching unit 111 includes a switching state (first switching state) in which a command signal output from the control unit 113 is output to the CD / DVD drive 14 or the HDD 13 and a command signal output from the navigation unit 10. The switching state (second switching state) to be output to the HDD 13 is switched. In addition, the data switching unit 112 has a switching state (third switching state) in which music data output from the CD / DVD drive 14 is output to the HDD 13 in response to a command signal from the control unit 113, and from the navigation unit 10. In response to the command signal, the switching state (fourth switching state) in which the map data output from the HDD 13 is output to the navigation unit 10 is switched. Thus, the music data can be read from the music CD by the music server unit during the ripping process and output to the HDD, and the necessary map data can be read out from the HDD using the navigation unit during the navigation process.

(3) When the command switching unit 111 is in the first switching state and the data switching unit 112 is in the third switching state, a command signal is output from the control unit 113 to the HDD 13 to control the HDD 13. The music data output from the CD / DVD drive 14 is written to the HDD 13. Since it did in this way, the music data output from music CD to HDD can be written in HDD.

(4) The music data output from the CD / DVD drive 14 is encrypted, and a release key for releasing the encrypted music data is written to the HDD 13 together with the encrypted music data. Then, the release key written in the HDD 13 and the encrypted music data are read out by the music server unit 11, the encryption of the music data is released, a reproduction process is performed, and an audio signal is output. Since it did in this way, the unlimited duplication of the music data recorded on HDD can be prevented.

(5) When the ripping process is performed during the execution of the navigation process, the monitor 12 displays that the ripping process is being superimposed on the map display screen. Since it did in this way, a user can recognize that the navigation function and the function which records a music CD on HDD are performed simultaneously.

  In the above-described embodiment, an example in which music data is read from a music CD and written to the HDD has been described. However, the present invention is not limited to a general commercial music CD, but a CD-R, MD, DVD, Alternatively, music data can be read from various recording media such as various memory cards. Further, an analog audio signal from a radio or television may be taken in, converted to data by analog / digital conversion, and then written to the HDD.

  In the above embodiment, the in-vehicle music server circuit is realized by the music server unit 11, the in-vehicle navigation circuit is realized by the navigation unit 10, the music data acquisition means is realized by the CD / DVD drive 14, and the recording means is realized by the HDD 13. Further, the control unit is realized by the functional block of the control unit 113, the command signal switching unit is realized by the command switching unit 111, and the data switching unit is realized by the functional block of the data switching unit 112. However, the present invention is not limited to the above-described embodiment, and other modes conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

It is a figure which shows the structure of the vehicle-mounted navigation apparatus with a music server function by one Embodiment of this invention. It is a functional block diagram of a music server unit. It is a figure showing the input-output signal between each functional block of a music server unit at the time of execution of a navigation process. It is a figure showing the input-output signal between each functional block of a music server unit at the time of a music reproduction process. It is a figure showing the input-output signal between each functional block of a music server unit at the time of a ripping process. It is a figure which shows the example of a monitor display screen when performing ripping during execution of a navigation function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Audio apparatus 10 Navigation unit 11 Music server unit 12 Monitor 13 HDD
14 CD / DVD drive 110 Command receiving unit 111 Command switching unit 112 Data switching unit 113 Control unit 114 Music data processing unit

Claims (6)

An in-vehicle navigation circuit that performs navigation processing for guiding a vehicle to a destination based on map data, music data acquisition means for acquiring music data obtained by converting music and voice into data, and the map data is recorded Connected to a recording means capable of writing data,
And control means for outputting a ripping for command signals for controlling any of the music data acquisition means or said recording means,
Output a first switching state for outputting the ripping for command signals outputted from the control means to the music data acquisition means or said recording means, a command signal for navigation which is output from the vehicle-mounted navigation circuit to said recording means Command signal switching means for switching between the second switching states to be performed;
A third switching state in which music data output from the music data acquisition means in response to the ripping command signal is output to the recording means, and map data output from the recording means in response to the navigation command signal A vehicle switching music server circuit comprising: a data switching unit that switches between a fourth switching state and a fourth switching state in which the vehicle switching circuit is output to the vehicle navigation circuit. The in-vehicle music server circuit according to claim 1 ,
When the command signal switching means is in the first switching state and the data switching means is in the third switching state, the ripping command signal is output from the control means to the recording means, and the recording means is An in-vehicle music server circuit, wherein the music data output from the music data acquisition means is written to the recording means by controlling. The in-vehicle music server circuit according to claim 2 ,
In-vehicle music characterized in that the music data output from the music data acquisition means is encrypted, and a release key for releasing the encrypted music data is written in the recording means together with the encrypted music data Server circuit. The in-vehicle music server circuit according to claim 3 ,
An in-vehicle system characterized in that a release key and encrypted music data written in the recording means are read from the recording means, and the audio data is output by releasing the encryption of the music data and performing reproduction processing. Music server circuit. The in-vehicle music server circuit according to any one of claims 1 to 4 ,
The in- vehicle navigation circuit;
The music data acquisition means;
An in-vehicle information terminal comprising the recording means. The in-vehicle information terminal according to claim 5 ,
An in-vehicle information terminal further comprising display means for displaying a map based on the map data and displaying that the music data acquired by the music data acquisition means is written to the recording means.

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