JP2008021372A - On-vehicle information terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle information terminal in which only a main CPU accesses an HDD in which map data and music data are stored, and only a sub-CPU accesses a DVD in which music data is stored. <P>SOLUTION: The sub CPU 21 controls data read processing for a DVD drive 60 in which the music CD is set. The main CPU 11 controls data write processing and data read processing for an HDD 50 in which map data and ripped music data are stored. Music data is read from the DVD drive 60 by the sub-CPU 21, it is encoded (ripped) by a DSP 40 and stored temporarily in FIFO 2<SB>-1</SB>. The music data stored temporarily in the FIFO2<SB>-1</SB>is stored in the HDD 50 by the main CPU 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention displays a map using map data stored in a high-speed large-capacity storage medium such as a hard disk, and rips AV data such as music and video stored in another storage medium such as a DVD to form a high-speed large-capacity storage medium. The present invention relates to an in-vehicle information terminal that stores information.

There is known an in-vehicle navigation device having a navigation function for guiding a vehicle to a destination and a function for reproducing and outputting music data ripped from a music CD to a hard disk (HDD) (Patent Document 1).
JP 2005-172563 A

  In the apparatus of Patent Document 1, music data ripped from a music CD is stored together with map data and point data necessary for navigation on one hard disk. In this apparatus, navigation processing is performed by the main navigation CPU, music data is reproduced by the control unit (CPU) of the music server, and ripping processing for encoding the music data and storing it in the HDD is performed.

  For this reason, when a request for music processing is input while the main CPU is executing navigation processing, processing for connecting one of the CPUs to the hard disk is required, and the processing is complicated. For example, when using an interface called ATAPI, ATA arbitration processing is required.

(1) An in-vehicle information terminal according to a first aspect of the invention includes a first processor that accesses a first storage medium that stores AV data such as music data and video data, the map data, and the AV data after the ripping process. A second processor that accesses a second storage medium that stores the AV data of the first storage medium under the control of the first processor, and the AV data that has been ripped under the control of the second processor The information is stored in the second storage medium.
(2) The invention of claim 2 is the in-vehicle information terminal according to claim 1, wherein the first processor (a) temporarily stores the AV data of the first storage medium in the first buffer memory; b) The AV data temporarily stored in the first buffer memory is ripped and temporarily stored in the second buffer memory, and the second processor (c) stores the AV data temporarily stored in the second buffer memory in the second It memorize | stores in this storage medium.
(3) According to the invention of claim 3, in the in-vehicle information terminal according to claim 1, the determination means for determining the load of the second processor and the determination means determine that the load of the second processor is large. When the ripping AV data is prohibited from being stored in the second storage medium and the determination means determines that the load on the second processor is small, the ripped AV data is stored in the second storage medium. It is further characterized by further comprising control means for permitting the above.
(4) In the fourth aspect of the present invention, in the in-vehicle information terminal according to the third aspect, when the reproduction of AV data is instructed, the first processor: (a) stores the AV data in the first storage medium Temporarily stored in the first and second buffer memories, (b) AV data temporarily stored in the first buffer memory is reproduced and output, and (c) AV data temporarily stored in the second buffer memory is ripped Process and temporarily store in the third buffer memory, and the second processor (d) stores the AV data temporarily stored in the third buffer memory in the second storage medium when the load is small. (E) When the load is large, the AV data temporarily stored in the third buffer memory is not stored in the second storage medium.
(5) According to a fifth aspect of the present invention, in the in-vehicle information terminal according to any one of the second to fourth aspects, the AV data is exchanged between the devices via the ATAPI-compliant interface, and the first processor is the first processor. And the second processor recognizes the first processor, the second storage medium, and the buffer memory as device devices.

  According to the present invention, since only the second processor of the first and second processors accesses the second storage medium, complicated processing such as so-called ATA arbitration becomes unnecessary.

-First embodiment-
FIG. 1 shows the configuration of a navigation device that is a first embodiment of the in-vehicle information terminal of the present invention. The navigation device 1 in FIG. 1 has music and video playback functions in addition to normal navigation functions such as map display and route guidance. In this specification, music data reproduction processing will be described. The navigation device includes a main control device 10 on which a navigation main CPU (processor) 11 is mounted, a sub-control device 20 on which a music playback sub CPU (processor) 21 is mounted, an FPGA 30, a DSP 40, and a hard disk drive ( HDD) 50 and a DVD drive 60.

  The HDD 50 is a high-speed and large-capacity storage medium and a reading device that read / write map data and music data stored in a built-in hard disk. The music data in the HDD 50 is music data encoded by the ripping process. The DVD drive 60 is an entertainment storage medium and reading device for reading / writing music data stored in a set music CD. The music CD is a low-speed and small-capacity storage medium compared to the HDD 50.

  In the navigation device of this embodiment, the following three modes can be selected for music playback.

(1) Mode for performing only music reproduction In this mode, music data recorded on a music CD set in the DVD drive 60 is reproduced, or ripped music data recorded on the HDD 50 is reproduced.

(2) Music playback and ripping mode (automatic ripping mode)
In this mode, when the music data of the selected music is not recorded on the HDD 50, when the music data is reproduced from the music CD, the music data is simultaneously encoded and written to the HDD 50.

(3) Mode in which only ripping is performed In this mode, music data recorded on a music CD set in the DVD drive 60 is encoded and stored in the HDD 50.

  In this embodiment, only the main CPU 11 of the main control device 10 can access the HDD 50, and the sub CPU 21 of the sub control device 20 does not access the HDD 50. Therefore, conventional ATA arbitration is not required.

Hereinafter, a navigation device according to an embodiment will be described with reference to the drawings.
In the apparatus of this embodiment, command exchange or data exchange between the storage medium and the CPU is performed using an IDE (Integrated Drive Electronics) interface called ATAPI (AT Attachment Packet Interface).

For such command exchange and data exchange, the main controller 10 is provided with an ATAPI Host I / F 12, and the FPGA 30 is provided with an ATAPI Host I / F 31 and an ATAPI Device I / F 32. FPGA30 further includes a DSP I / F33, and the sub CPU I / F34, ATAPI Host buffer memory _FIFO1 -1 35 corresponding to the I / F 31, a buffer memory _FIFO2 -1 37 and FIFO2 corresponding to ATAPI Device I / F32 _-2 38 is implemented. Hereinafter, the buffer memory is simply referred to as FIFO.

The FIFO1 _-1 35 temporarily stores music data read from the DVD 60. Temporarily stored music data to the FIFO1 _-1 35 along with being reproduced is transferred to the DSP 40, is encoded.

The FIFO2 ₋₁ 37 temporarily stores music data encoded by the DSP 40. The encoded music data temporarily stored in the FIFO2 ₋₁ 37 is transferred to the HDD 50 and stored therein.

The FIFO 2 _-2 38 is encoded music data stored in the HDD50 is temporarily stored. The encoded music data temporarily stored in the FIFO _{2 -2} 38 is transferred to the DSP 40, decoded, and reproduced and output.

Main controller 10 includes main CPU 11 and ATAPI Host I / F 12 described above, image memory 13, peripheral circuits, and the like, and executes various kinds of control by executing control programs stored in ROM. The main CPU11 stores performs predetermined route search processing based on the stored map data to HDD 50, the encoded music data temporarily stored in the encoded _{FIFO 2} -1 37 under the control of the sub CPU21 in HDD 50 . Furthermore, temporarily stores the music data stored in the HDD50 the _{FIFO 2} -2 38, and outputs the temporarily stored music data by decoding from the speaker 74 in DSP 40.

The sub-control device 20 includes a sub CPU 21 and its peripheral circuits, and performs various controls by executing a control program stored in the ROM. Sub CPU21 stores temporarily the music data stored in the music CD set in the DVD drive 60 to _FIFO1 -1 35. Sub CPU21 reproduces music data temporarily stored in _FIFO1 -1 35 at DSP40 output from the speaker 74. The DSP 40 encodes the music data and stores it in the FIFO 2 ₋₁ 37.

  The image memory 13 stores image data to be displayed on the display monitor 72 described later. The image data includes road map drawing data and various graphic data, which are appropriately generated based on the map data stored in the HDD 50. The navigation device can perform map display and the like by using the image data generated in this way.

  The HDD 50 is a recording device using a magnetic hard disk as a recording medium, and map data and the like necessary for navigation processing are written in the HDD 50. In addition, music data that has been imported from a music CD and encoded by ripping processing is written.

  The DVD drive 60 is a device that reads music data recorded on a set music CD. The music data read by the DVD drive 60 is reproduced and output from the speaker 74, and is encoded and stored in the HDD 50.

  The main control device 10 is connected with a current location detection device 71, a display monitor 72, an input device 73, and a speaker 74, and executes a well-known navigation function.

  The current location detection device 71 is a device that detects the current location of the vehicle, and includes, for example, a vibration gyro that detects the traveling direction of the vehicle, a vehicle speed sensor that detects the vehicle speed, a GPS sensor, and the like. The navigation device 1 determines a map display range, a route search start point, and the like based on the current location of the vehicle detected by the current location detection device 71, and displays the current location on the map.

  Based on various information such as map data, the display monitor 72 provides various information such as a road map in the vicinity of the vehicle position as a screen display to the passenger of the navigation device. The input device 73 has an input switch for the occupant to set the destination of the vehicle. The speaker 74 provides various information to the occupant by voice based on various information such as map data and outputs the selected music.

  When the destination is set by an occupant by operating the input device 73, the navigation device calculates a route to the destination using the current location detected by the current location detection device 71 as a departure point, and displays a recommended route on the screen. The navigation device instructs the vehicle occupant to travel in the direction of travel using a screen or voice so that the vehicle can travel according to the recommended route.

Next, music reproduction processing and ripping processing will be described.
The music playback process differs depending on whether or not the automatic ripping mode is set. The automatic ripping mode is a mode in which music data is ripped and recorded in the HDD 50 during music playback. Hereinafter, each of the automatic ripping mode settings will be described.

(I) Music playback (when automatic ripping mode is set)
(IA) When there is no ripping data in the HDD 50 When the automatic ripping mode is set by the user's operation of the input device 73 and the encoded data of the selected music is not stored in the HDD 50, the following is performed. Music playback and ripping are performed.

(1) under the initiative of the sub CPU 21, reads the music data from the DVD drive 60 through the sub CPU I / F 34 and the ATAPI Host I / F 31, and stores the transferred _FIFO1 -1 35.
(2) When the data volume of _FIFO1 -1 35 becomes 80%, _FIFO1 -1 35 may interrupt the sub CPU21 through the sub CPU I / F 34.
(3) Due to this interruption, the sub CPU 21 once stops reading and transferring data from the DVD drive 60.

(4) The music data in the FIFO _{1 -1} 35 is sequentially transferred to the DSP 40 via the DSP I / F 33 under the initiative of the sub CPU 21.
(5) The DSP 40 reproduces and encodes the transfer data. The music data reproduced by the DSP 40 is output from the main controller 10 through the amplifier (not shown) through the speaker 74 under the initiative of the sub CPU 21.

(6) When the data in the FIFO1 _-1 35 becomes empty, the FIFO1 _-1 35 interrupts the sub CPU 21. Sub CPU21 is configured to restart the data read from the DVD drive 60 through the sub CPU I / F 34 and the ATAPI Host I / F 31, resumes also data transfer and storage in the _FIFO1 -1 35.
By repeating the above, music data of the music CD is reproduced under the initiative of the sub CPU 21 and music is output from the speaker 74.

The music data encoded by the DSP 40 is transferred to the HDD 50 as follows.
Encoded data (11) DSP 40 is stored are transferred to _{FIFO 2} -1 37 under the control of the sub CPU 21. Thus, the ripped data is stored in the FIFO2 ₋₁ 37 while the music is reproduced and output.
(12) When the storage capacity reaches 80%, the FIFO 2 _-1 37 interrupts the sub CPU 21 via the sub CPU I / F 34. Thereby, the sub CPU 21 interrupts the main CPU 11. The sub CPU 21 may interrupt the main CPU 11 with a serial signal.

(13) The interrupt, main CPU11 is the data stored in the _{FIFO 2} -1 37 reads via the ATAPI Device I / F32, and stores the transferred HDD 50. Thus, the ripped data is stored in the HDD 50 while the music is reproduced and output.
(14) When the data in the FIFO 2 ₋₁ 37 becomes empty, the FIFO 2 ₋₁ 37 interrupts the sub CPU 21 via the sub CPU I / F 34.
(15) Sub CPU21 The interrupt transfers music data of _FIFO1 -1 35 to DSP 40, encoded by DSP 40. The encoded music data through the DSP I / F33 stores the _{FIFO 2} -1 37.
By repeating the above, the music data is ripped while being reproduced, and the encoded music data is stored in the HDD 50.

(IB) When there is ripping data in the HDD 50 When the automatic ripping mode is set by the user's operation of the input device 73 and the encoded data of the selected music is stored in the HDD 50, as follows Thus, music is reproduced by the ripped data of the HDD 50.

(21) The main CPU 11 reads the ripped data stored in the HDD 50 via the ATAPI Host I / F 12, that is, the encoded data, transfers the data to the FIFO _{2 -2} 38 via the ATAPI Device I / F 32, and stores it.
(22) The FIFO _{2 -2} 38 interrupts the sub CPU 21 when its storage capacity reaches 80%. Thereby, the sub CPU 21 interrupts the main CPU 11. The sub CPU 21 may interrupt the main CPU 11 with a serial signal.

(23) The interrupt, main CPU11 is a reading untreated data from HDD50 via the ATAPI Host I / F 12, via the ATAPI Device I / F 32 to the _{FIFO 2} -2 38 The process of transferring data temporarily Cancel. Also it transfers the data stored under the control of the sub CPU21 in _{FIFO 2} -2 38 to DSP40 through the DSP I / F 33.
(24) The DSP 40 decodes and reproduces the transferred encoded data. The reproduced music data is output from the speaker 74 via an amplifier (not shown).

(II) Music playback (when automatic ripping mode is not set)
(II-A) When there is no ripped data in the HDD 50 When the user instructs music playback using the input device 73, the music data is read from the music CD by the same processing as (1) to (6) described above, and the music data is read by the DSP 40. Is reproduced and output from the speaker 74.
(II-B) When Ripped Data is in the HDD 50 When the user instructs music playback using the input device 73, the encoded music data is read from the HDD 50 by the same processing as (11) to (14) described above, and the DSP 40 The music data is reproduced and output from the speaker 74.

(III) Ripping process not accompanied by music playback When a mode in which only ripping processing is performed separately from music playback is selected, when ripping processing is instructed by the input device 73, music data is ripped as follows. And stored in the HDD 50.

(31) sub CPU21 through the sub CPU I / F 34 and the ATAPI Host I / F 31, reads the music data music selection from the music CD in the DVD drive 60, as described above, then transferred to _FIFO1 -1 35 Remember. The music data in the FIFO1 _-1 35 is transferred to the DSP 40 under the control of the sub CPU 21.
(32) The DSP 40 encodes the transferred music data. The encoded data is stored in the FIFO 2 ₋₁ 37 under the control of the sub CPU 21.
(33) The FIFO2 ₋₁ 37 interrupts the sub CPU 21 when its storage capacity reaches 80%. Thereby, the sub CPU 21 interrupts the main CPU 11.

(34) The interrupt, main CPU11 transfers the HDD50 reads the encoded music data stored in the _{FIFO 2} -1 37 via the ATAPI Device I / F32.
(35) When the data in the FIFO 2 ₋₁ 37 becomes empty, the FIFO 2 ₋₁ 37 interrupts the sub CPU 21 via the sub CPU I / F 34.
(36) The sub CPU 21 transfers the music data temporarily stored in the FIFO _{1 −1} 35 to the DSP 40, and stores the music data encoded by the DSP 40 in the FIFO 2 ₋₁ 37.
The ripping process is performed by repeating the above process.

According to the navigation device according to the embodiment described above, the following operational effects can be obtained.
(1) Music data is encoded (ripped) under the initiative of the sub CPU 21. As a result, the load on the main CPU 11 can be reduced. Further, there is no need for the sub CPU 21 to access the HDD 50 to store the ripped data, and the performance of the sub CPU 21 can be reduced and the cost can be reduced.

(2) The music data encoded and temporarily stored by the sub CPU 21 is stored in the HDD 50 by the main CPU 11. The music data stored in the HDD 50 is read by the main CPU 11. That is, since only the main CPU 11 accesses the HDD 50, complicated processing such as ATA arbitration processing is unnecessary, and the system can be simplified.

(3) The main CPU11 is, since to recognize sub _{CPU21, FIFO2 -1 37, FIFO2 -2} 38 as ATAPI Device, can be simplified process. The main CPU 11 recognizes the HDD 50 as an ATAPI Device, as in the conventional case. Further, the sub CPU 21 recognizes the DVD drive 60 as an ATAPI Device as before.

-Second Embodiment-
In the navigation apparatus in the first embodiment, when setting automatic ripping mode, main CPU11, regardless of its load, and to be stored in the HDD50 reads encoded music data stored in the _{FIFO 2} -1 37. In the second embodiment, encoded music data is transferred to the HDD 50 and stored when the load on the main CPU 11 is small.

In the navigation device of the second embodiment, in addition to _FIFO1 -1 35 corresponding to the ATAPI Host I / F 31 also _FIFO1 -2 36 are mounted. In FIFO1 _-1 35 and _FIFO1 -2 36 is music data read from the DVD60 is temporarily stored, the music data stored in _FIFO1 -1 35 is used for reproduction, stored in _FIFO1 -2 36 The music data is used for ripping.

A description will be given assuming that music playback is instructed when the automatic ripping mode is set, and that the ripped data of the music instructed to be played back is not in the HDD 50.
When the automatic ripping mode is set by the user's operation of the input device 73 and the encoded data of the selected music is not stored in the HDD 50, music playback and ripping are performed as follows.

Under the leadership of the sub CPU 21, the sub CPU I / F 34 and the ATAPI Host I / F 31 reads out the music data from the DVD drive 60 via, _FIFO1 -2 36 for _FIFO1 -1 35 and the music data ripped for music data reproduction Transfer to and store.

  The music playback process at the time of automatic ripping is as follows (41) to (45), and the ripping process is as follows (51) to (58).

-Music playback process-
(41) when the data capacity of _FIFO1 -1 35 becomes 80%, _FIFO1 -1 35 may interrupt the sub CPU21 through the sub CPU I / F 34.
(42) By this interruption, the sub CPU 21 once stops the data read transfer from the DVD drive 60.

(43) The music data in the FIFO _{1 -1} 35 is sequentially transferred to the DSP 40 via the DSP I / F 33 under the initiative of the sub CPU 21.
(44) The DSP 40 reproduces the transfer data. The music data reproduced by the DSP 40 is output from the main controller 10 through the amplifier (not shown) through the speaker 74 under the initiative of the sub CPU 21.

(45) When the data in the FIFO _{1 −1} 35 becomes empty, the FIFO _{1 −1} 35 interrupts the sub CPU 21. Sub CPU21 is configured to restart the data read from the DVD drive 60 via the ATAPI Host I / F 31, resumes also data transfer and storage in the _FIFO1 -1 35.
By repeating the above, music data of the music CD is reproduced under the initiative of the sub CPU 21.

-Ripping process-
(51) When the data capacity in the FIFO 1 _-2 36 reaches 80 percent, the FIFO 1 _-2 36 interrupts the sub CPU 21 via the sub CPU I / F 34.
(52) By this interruption, the sub CPU 21 temporarily stops the data read transfer from the DVD drive 60.

(53) The music data in the FIFO 1 _-2 36 is sequentially transferred to the DSP 40 via the DSP I / F 33 under the initiative of the sub CPU 21.
(54) The DSP 40 encodes the transfer data. Music data encoded in DSP40, under the leadership of the sub-CPU 21, and stores the transfer _{FIFO 2} -1 37.

(55) The FIFO2 ₋₁ 37 interrupts the sub CPU 21 when its storage capacity reaches 80%. Thereby, the sub CPU 21 interrupts the main CPU 11. The sub CPU 21 may interrupt the main CPU 11 with a serial signal.

(56) By this interruption, the main CPU 11 determines its own processing load. If the load is less than the predetermined value, the data stored in the _{FIFO 2} -1 37 reads via the ATAPI Device I / F32, and stores the transferred HDD 50. If the load is greater than a predetermined value, the reading of data stored in the _{FIFO 2} -1 37, so as not transfer storage process to the HDD 50.

(57) the load of the main CPU11 is small, the reading of data stored in the _{FIFO 2} -1 37, when the transfer process of storing the HDD50 is running, the data in _{FIFO 2} -1 37 becomes empty, FIFO 2 _{- 1} 37 interrupts the sub CPU 21 via the sub CPU I / F 34.

(58) Sub CPU21 by this interrupt, and transfers the music data _FIFO1 -2 36 to sequentially DSP40 through the DSP I / F33. The DSP 40 encodes the transfer data. Music data encoded in DSP40, under the leadership of the sub-CPU 21, and stores the transfer _{FIFO 2} -1 37.
By repeating the above, the music data is ripped while being reproduced, and the encoded music data is stored in the HDD 50.

  The load on the main CPU 11 can be determined based on the load factor of the CPU and the access frequency to the map data in the HDD 50. If the ripped data is already stored in the HDD 50, the main CPU 11 reproduces the music data in the HDD 50 and outputs it from the speaker 74 regardless of the load in accordance with the music reproduction instruction. Further, when reproducing ripped data, it is necessary to ensure a minimum transfer that does not interrupt music.

Although the automatic ripping mode has been described above, the following data processing is performed in the mode in which only ripping is performed. The music data is temporarily stored in the FIFO 1 _-2 36, and the temporarily stored music data is encoded by the DSP 40 and stored in the FIFO 2 ₋₁ 37. The main CPU 11 determines its own processing load. If the load is less than the predetermined value, the data stored in the _{FIFO 2} -1 37 reads via the ATAPI Device I / F32, and stores the transferred HDD 50. If the load is greater than a predetermined value, the reading of data stored in the _{FIFO 2} -1 37, so as not transfer storage process to the HDD 50.

The navigation device of the second embodiment described above has the following operational effects.
(1) when the load of the CPU11 is small and so as to store and transfer the music data stored in the _{FIFO 2} -1 37 encoded in DSP40 the HDD 50. As a result, the load on the main CPU 11 can be further reduced.
(2) music data read from the DVD drive 60 and stored in _FIFO1 -1 35 and _FIFO1 -2 36, the playback data of music data _FIFO1 -1 35, for encoding music data _FIFO1 -2 36 (ripping Data). When the time can not be stored load greatly ripped data in HDD50 main CPU11 is long, if temporarily storing music data only _FIFO1 -1 35 as in the first embodiment, reproduction of the DSP40 proceeds, The FIFO1 _-1 35 may be overwritten with new music data. In this case, the music data is interrupted when the load on the main CPU 11 is reduced and the ripped data is stored in the HDD 50. Therefore, it is encoded using a temporary storage; then, the music data of _FIFO1 -2 36 when the load is reduced music data separately in _FIFO1 -2 36 for ripping and _FIFO1 -1 35 for reproduction Thus, the music data can be correctly stored in the HDD 50.

  In the above description, the HDD 50 storing the map and ripped music data is described as a high-speed and large-capacity storage medium, and the music CD is described as a low-speed and small-capacity storage medium. Anything may be used as long as it is stored on a medium.

The _{FPGA30, FIFO1 -1 35, FIFO1 -2} 36, FIFO2 -1 37, FIFO2 -2 38, but so as to implement various I / F31~34, it is not necessary to implement these devices as FPGA 30. An ASIC can also be used. The music data is encoded by the DSP 40, but may be encoded by the sub CPU 21.

  In the above embodiment, although demonstrated as a navigation apparatus, it is not limited to a navigation apparatus, This invention is applicable also to the following vehicle-mounted information terminals. That is, such an in-vehicle information terminal includes a first processor that accesses a first storage medium that stores AV data such as music data and video data and controls data read processing, map data, and ripping processing. A second processor for accessing the second storage medium for storing the subsequent AV data to control the data writing process and the data reading process, and the AV data stored in the first storage medium by the first processor; The AV data ripped by the second processor is stored in the second storage medium.

The block diagram which shows the structure of the navigation apparatus in 1st Embodiment. The block diagram which shows the structure of the navigation apparatus in 2nd Embodiment.

Explanation of symbols

10: Main controller 11: Main CPU
12: ATAPI Host I / F 20: Sub-controller 21: Sub CPU 30: FPGA
31: ATAPI Host I / F 32: ATAPI Device I / F
35: FIFO1 _-1 36: FIFO1 _-2
37: FIFO2 _-1 38: FIFO2 _-2
50: HDD 60: DVD drive

Claims (5)

A first processor for accessing a first storage medium for storing AV data such as music data and video data;
A second processor for accessing a second storage medium for storing the map data and the AV data after the ripping process;
The AV data of the first storage medium is ripped under the control of the first processor, and the ripped AV data is stored in the second storage medium under the control of the second processor. In-vehicle information terminal. The in-vehicle information terminal according to claim 1,
The first processor is
(A) temporarily storing AV data of the first storage medium in a first buffer memory;
(B) Ripping the AV data temporarily stored in the first buffer memory and temporarily storing it in the second buffer memory;
The second processor is
(C) The in-vehicle information terminal characterized in that the AV data temporarily stored in the second buffer memory is stored in the second storage medium. The in-vehicle information terminal according to claim 1,
Determining means for determining a load on the second processor;
When it is determined by the determination means that the load on the second processor is large, storage of the ripped AV data in the second storage medium is prohibited, and the determination means prohibits the storage of the second processor. An in-vehicle information terminal further comprising a control unit that permits storage of the ripped AV data in a second storage medium when it is determined that the load is small. The in-vehicle information terminal according to claim 3,
When playback of the AV data is commanded,
The first processor is
(A) temporarily storing AV data of the first storage medium in the first and second buffer memories;
(B) The AV data temporarily stored in the first buffer memory is reproduced and output,
(C) Ripping the AV data temporarily stored in the second buffer memory and temporarily storing it in the third buffer memory;
The second processor is
(D) When the load is small, AV data temporarily stored in the third buffer memory is stored in the second storage medium,
(E) An on-vehicle information terminal characterized by not storing AV data temporarily stored in the third buffer memory in the second storage medium when the load is large. The in-vehicle information terminal according to any one of claims 2 to 4,
The AV data is exchanged between devices via an ATAPI-compliant interface.
The first processor recognizes the first storage medium as a device device;
The in-vehicle information terminal, wherein the second processor recognizes the first processor, the second storage medium, and the buffer memory as device devices.

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