JP2010161446A - Content reproducing unit and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the time required for listing content stored in a terminal under communication. <P>SOLUTION: A content reproducing unit includes: a control section 10 for acquiring own list information data 27A required for listing musical piece information relating to musical piece data stored in a portable musical piece reproducing unit 20 from the portable musical piece reproducing unit 20 in establishing a communication link to the portable musical piece reproducing unit 20; and a storage means for storing a terminal identification table 31 for correlating the musical piece information included in the obtained own list information data 27A with the peculiar identification information of the portable musical piece reproducing unit 20 for storage, and a list information table 30. A display section 12 performs listing, based on the terminal identification and list information tables 31, 30 when listing the musical piece information of the musical piece data stored in the terminal of the portable musical piece reproducing unit 20 under communication. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a content playback apparatus for playing back content, and a control method for the content playback apparatus.

Some car audio devices (content playback devices) are communicably connected to information terminal devices (terminals) that store music data (contents), and receive and play music data from the information terminal devices (for example, Patent Document 1).
In a car audio device that captures and reproduces music data from an information terminal device in communication as in Patent Document 1, by displaying music information such as the music title and artist name of the music related to the music data as a list on the display unit, Some provide music information to the user. In this type of car audio device, when music information is displayed in a list on the display unit, information to be displayed in a list is acquired from the information terminal device each time, and music information is displayed in a list based on the acquired information.
JP 2003-50589 A

  However, in the above-described car audio device, when music information is displayed in a list on the display unit, information to be displayed in a list is acquired from the information terminal device each time, so that new music information needs to be displayed on the display unit as a list. Each time, the information must be acquired from the information terminal device according to a predetermined communication protocol, and it takes time until new music information is displayed in a list.

  The present invention has been made in view of the above-described circumstances, and in the case of displaying a list of contents stored in a communicating terminal, a content reproduction apparatus that shortens the time required for the list display, and It is an object of the present invention to provide a method for controlling a content reproduction apparatus.

In order to achieve the above object, the present invention displays a list of contents stored in a communicating terminal and a reproducing means for communicating with a terminal that stores a plurality of contents and reproducing the contents acquired from the terminal. A list information acquisition means for acquiring, from the terminal, list information for use in displaying a list of contents stored in the terminal when a communication link is established with the terminal. Storage means for storing the list information acquired from the terminal by the list information acquisition means in association with information indicating the terminal, and the display means stores the content stored in the communicating terminal. When displaying the list, the list is stored based on the list information stored in association with the information indicating the terminal by the storage unit. Characterized in that it displays.
According to this configuration, when a list of contents stored in a communicating terminal is displayed based on the list information stored by the storage unit without acquiring information to be displayed in a list from the terminal according to a predetermined communication protocol. List display. Therefore, it is possible to reduce the time required for the list display.

Here, in the content reproduction apparatus of the above invention, when a communication link is established with the terminal, and new list information that is new list information is acquired from the terminal by the list information acquisition unit, The storage means stores the new list information in association with the information indicating the terminal when the information indicating the terminal is not stored by the storage means, and the information indicating the terminal is stored by the storage means. If the old list information is stored in association with the information indicating the terminal, the old list information may be updated with the new list information.
According to this configuration, the latest list information can be reliably stored for both the terminal for which the communication link has been established for the first time and the terminal for which the communication link has been established in the past.

Further, in the content reproduction apparatus of the above invention, when the storage unit updates the old list information with the new list information, the display unit displays the content stored in the communicating terminal. The list may be displayed based on the old list information.
According to this configuration, even when the old list information is being updated with the new list information, the information to be displayed in the list is not acquired from the terminal according to the predetermined communication protocol, based on the old list information. List display can be performed. Therefore, it is possible to reduce the time required for the list display.

Further, in the content reproduction apparatus according to the invention, when the storage unit updates the old list information with the new list information, the old list is displayed when a list of contents stored in a communicating terminal is displayed. Content that is included in the information but not stored in the terminal may be specified, and list display of the specified content may be prohibited.
According to this configuration, since the list display of content that is not actually stored in the currently communicating terminal is prohibited, the convenience of the user can be improved.

In the content reproduction apparatus of the above invention, the plurality of terminals store the same content, and the list information acquisition unit acquires the list information of the content from each of the plurality of terminals. In this case, the storage unit may store the list information of the content in association with information indicating the plurality of terminals in one database.
According to this configuration, it is possible to prevent the same content list information from being stored in different databases, and to improve the storage efficiency of the storage means.

  In order to achieve the above object, the present invention provides a reproduction means for communicating with a terminal storing a plurality of contents and reproducing the contents acquired from the terminal, and a list of contents stored in the communicating terminal. And a display means for displaying the list information to be used to display a list of all contents stored in the terminal when a communication link is established with the terminal. And the acquired list information is stored in association with the information indicating the terminal, and when the contents stored in the communicating terminal are displayed in a list, the storage means corresponds to the information indicating the terminal. A list display is performed based on the list information stored additionally.

  The present invention eliminates the need to acquire list information from a terminal in accordance with a predetermined communication protocol each time content stored in a terminal that is in communication is displayed as a list, thereby reducing the time required for displaying the list. can do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
FIG. 1 is a block diagram showing an in-vehicle device 1 according to an embodiment of a content reproduction device of the present invention.
This in-vehicle device 1 is a car audio device that is mounted on a vehicle such as a passenger car and emits sound such as music from a speaker disposed on the vehicle. The in-vehicle device 1 has a function of performing connection-type short-range wireless communication with the portable music playback device 20, and when a user who has boarded the vehicle performs a predetermined operation, the surrounding wireless communication area The portable music playback device 20 existing in the vehicle (that is, in the car) is searched, a communication link is established with the searched portable music playback device 20, and information is exchanged with the portable music playback device 20. It is configured to be capable of streaming playback of music related to music data transmitted and received and transferred from the portable music playback device 20.

  In this embodiment, Bluetooth (registered trademark) is used as connectionless short-range wireless communication. In Bluetooth communication, a profile for examining the function provided by the Bluetooth communication device is defined. Therefore, after specifying that the communication link destination is the portable music playback device 20 capable of audio transfer by this profile, the communication link Can be established. Other communication methods such as a wireless LAN may be applied.

As shown in FIG. 1, the in-vehicle device 1 includes a control unit 10 (list information acquisition unit), a touch panel 11, a music data reproduction unit 17 (reproduction unit), an audio output unit 14, and a wireless communication unit 15. And a storage unit 16 (storage means).
The control unit 10 functions as a computer that controls the entire in-vehicle device 1, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a control program executed by the CPU, various data, and data. A RAM (Random Access Memory) for temporary storage is provided. The ROM also stores unique identification information (for example, a Bluetooth device address) for uniquely specifying the in-vehicle device 1. The control unit 10 controls the wireless communication unit 15 to be described later, and acquires list information data 27 </ b> A (described later) that is one of list information to be used for content list display from the portable music player 20. It also functions as a means.

The touch panel 11 includes a display unit 12 (display unit) and a touch operation unit 13.
The display unit 12 includes a liquid crystal display and displays various images (still images, moving images) including character images under the control of the control unit 10.
The touch operation unit 13 is touch-operated when the user gives an instruction to the in-vehicle device 1, and is arranged so as to overlap the display unit 12. When the touch operation unit 13 detects the touch operation, the touch operation unit 13 outputs an operation signal indicating the operation position to the control unit 10.

The music data reproduction unit 17 generates digital audio data based on the music data acquired from the portable music reproduction device 20 by the wireless communication unit 15 described later, and outputs the digital audio data to the audio output unit 14. The music data reproducing unit 17 according to the present embodiment is configured to be capable of streaming reproduction of music related to music data.
The audio output unit 14 incorporates a D / A converter, an amplifier, and the like that convert digital audio data into an analog audio signal. Based on the digital audio data input from the music data reproduction unit 17, the audio output unit 14 outputs various types of audio to the control unit 10. Output from the speaker at the volume specified by.

The wireless communication unit 15 performs wireless communication based on the Bluetooth standard with the portable music player 20 under the control of the control unit 10. The control unit 10 controls the wireless communication unit 15 to acquire music data from the portable music playback device 20 in communication. As will be described in detail later, the control unit 10 controls the wireless communication unit 15 when the wireless communication link is established with the portable music playback device 20, and the portable music playback device 20. The self-list information data 27A is acquired from.
The storage unit 16 stores various data in a rewritable manner, and includes, for example, an EEPROM or a hard disk. As shown in FIG. 1, the storage unit 16 stores a terminal identification table 31, an X list information table 30X, and a Y list information table 30Y, which will be described later.

FIG. 2 is a block diagram showing the configuration of the portable music player 20.
The portable music player 20 is a so-called portable music player that stores a plurality of pieces of music data as content, and outputs music related to the music data from headphones or earphones based on a user instruction. .
As shown in FIG. 2, the portable music player 20 includes a terminal-side control unit 21, a terminal-side display unit 22, an operation unit 23, a recording medium reading unit 24, a terminal-side song data playback unit 28, A terminal-side audio output unit 25, a terminal wireless communication unit 26, and a terminal-side storage unit 27 are provided.

  The terminal-side control unit 21 functions as a computer that controls the portable music player 20 as a whole, and temporarily stores a CPU, a ROM that stores a control program executed by the CPU, various data, and the like. RAM etc. are provided. In the ROM, unique identification information such as a Bluetooth device address for uniquely specifying the portable music player 20 is also stored.

The terminal-side display unit 22 includes a liquid crystal display, and displays various images (still images, moving images) including character images under the control of the terminal-side control unit 21.
The operation unit 23 includes an operation switch operated by the user, inputs an operation instruction from the user via the operation switch, and outputs the operation instruction to the terminal-side control unit 21.
The recording medium reading unit 24 reads various data recorded on the recording medium and outputs the data to the terminal side control unit 21 under the control of the terminal side control unit 21. The recording medium is a portable recording medium such as an optical recording medium such as a CD or DVD, a magnetic recording medium, or a card type or stick type recording medium using a semiconductor storage element, and records digital audio data. Is possible.

The terminal-side music data reproduction unit 28 generates digital audio data based on the music data stored in the terminal-side storage unit 27 and outputs the digital audio data to the audio output unit 14.
The terminal-side audio output unit 25 includes a D / A converter, an amplifier, and the like that convert digital audio data into an analog audio signal. The sound is output from the connected headphones or earphones at a volume specified by the terminal-side control unit 21.

The terminal wireless communication unit 26 performs wireless communication with the in-vehicle device 1 in accordance with the Bluetooth standard under the control of the terminal-side control unit 21.
The terminal-side storage unit 27 stores various data such as music data in a rewritable manner, and includes, for example, an EEPROM and a hard disk. For example, when the music data is input from the recording medium reading unit 24 when the recording medium reading unit 24 reads the recording medium storing the music data, the terminal-side control unit 21 stores the music data in the terminal Store in the side storage unit 27.

  As shown in FIG. 2, the terminal-side storage unit 27 stores its own list information data 27A (list information). The self-list information data 27 </ b> A is data including data indicating music information for each piece of music data for all music data stored in the terminal-side storage unit 27 by the portable music player 20. In this embodiment, it is assumed that the music information includes information indicating the artist name of the music, information indicating the album name of the music, and information indicating the music name of the music.

  By the way, in the conventional vehicle-mounted device 1, when displaying music information in a list on the display unit 12, the control unit 10 controls the wireless communication unit 15 to display music information to be displayed as a list from the portable music player 20. Acquired and displayed a list based on the acquired music information. At that time, the wireless communication unit 15 needs to acquire the music information by communication conforming to the Bluetooth standard, and it takes time to acquire the music information. Therefore, it takes time until the music information is displayed in a list. It was.

Based on this, in the present embodiment, when the communication link is established with the portable music playback device 20, the control unit 10 acquires the above-described self-list information data 27A from the portable music playback device 20 and acquires it. A list information table 30 is generated based on the own list information data 27 </ b> A and stored in the storage unit 16. This list information table 30 is generated for each different portable music player 20. After that, when it becomes necessary to display the music information as a list, the music information to be displayed as a list by communication is not acquired from the portable music player 20 and stored in the list information table 30 stored in the storage unit 16. Based on this, the music information is displayed as a list. Hereinafter, tables stored in the storage unit 16 including the list information table 30 will be described.
Note that displaying the music information as a list means, for example, displaying information indicating the album name in the music information in a list format on the display unit 12.

FIG. 3 is a diagram schematically showing the configuration of the terminal identification table 31.
As described above, the in-vehicle device 1 according to the present embodiment generates a list information table 30 (described later) related to the portable music playback device 20 for each portable music playback device 20 for which a communication link has been established. The generated list information table 30 is stored in the storage unit 16. The terminal identification table 31 is a table that stores unique identification information of a portable music player 20 and a list information table 30 (described later) related to the portable music player 20 in association with each other.
As shown in FIG. 3, one record of the terminal identification table 31 includes a unique identification information field 31a and a table name field 31b.
Unique identification information data indicating unique identification information is stored in the unique identification information field 31a.
The table name field 31b stores table name data indicating the name of the list information table 30.

FIG. 4 is a diagram schematically illustrating the configuration of the list information table 30. FIG. 4A schematically illustrates the configuration of the list information table 30X for X, which is an example of the list information table 30, and FIG. B) schematically illustrates the configuration of a Y list information table 30Y, which is an example of the list information table 30.
The list information table 30 relates to music information related to music data stored in a portable music player 20, specifically, information indicating an album name, information indicating a music name, and information indicating an artist name. When the list is displayed on the display unit 12, the table is referred to by the control unit 10, and the information indicating the album name, the information indicating the song name, and the information indicating the artist name are stored in association with each other. . As described above, in the present embodiment, when the music information is displayed in a list, the control unit 10 does not acquire the music information to be displayed in a list from the portable music player 20 but is stored in the storage unit 16. Based on the list information table 30, a list is displayed.

  As described above, in the present embodiment, the list information table 30 is generated and stored for each portable music player 20 for which a communication link has been established. Here, the list information table for X 30X shown in FIG. 4A is generated for the portable music player 20 with the unique identification information “X” (hereinafter referred to as “portable music player 20X”). The list information table 30Y for Y shown in FIG. 4B is a portable music player 20 whose unique identification information is “Y” (hereinafter referred to as “portable music player 20Y”). It is the list information table 30 produced | generated about.

As shown in FIGS. 4A and 4B, one record of the list information table 30 includes an album name field 30a, a song name field 30b, and an artist name field 30c. Yes.
Album name data indicating an album name is stored in the album name field 30a.
The song name field 30b stores song name data indicating the song name.
The artist name data indicating the artist name is stored in the artist name field 30c.

Next, the timing at which the list information table 30 is generated and the procedure when it is generated will be described.
When a communication link is established for the first time with respect to a certain portable music player 20, the control unit 10 generates a list information table 30 related to the portable music player 20.
When a communication link is established with the portable music player 20 for the first time, the list information table 30 related to the portable music player 20 is not generated, and the unique identification information field 31a of the terminal identification table 31 is generated. Thus, the unique identification information data of the portable music player 20 is not stored.
When the list information table 30 is generated, the control unit 10 stores unique identification information data indicating the unique identification information of the portable music player 20 in the unique identification information field 31a of the terminal identification table 31, and the table name field 31b. The table name data indicating the name of the newly generated list information table 30 is stored, and one new record is created.

The operation when generating one record of the list information table 30 will be described in detail. The control unit 10 controls the wireless communication unit 15 to acquire the own list information data 27 </ b> A from the portable music player 20. As described above, the self-list information data 27 </ b> A includes, for all music data stored in the terminal-side storage unit 27 by the portable music player 20, music information for each music data (indicating the artist name of the music). Information, information indicating the album name of the music, and information indicating the music name of the music). Next, for each piece of music data, the control unit 10 displays album name data indicating the album name related to the music data in the album name field 30a, music name data indicating the music name related to the music data in the music name field 30b, and The artist name data indicating the artist name related to the music data is stored in the artist name field 30c, and one record is generated.
The list information table 30 generated in this way is continuously stored in the storage unit 16 even when the establishment of the communication link with the portable music player 20 is cancelled.

  Next, a case where a communication link is established for a certain portable music player 20 after the second time will be described. In this case, the list information table 30 related to the portable music playback device 20 is stored in the storage unit 16, and the unique identification information field 31 a of the terminal identification table 31 is unique to the portable music playback device 20. The identification information data is stored. Therefore, by referring to the unique identification information field 31a of the terminal identification table 31, the control unit 10 can detect that the communication link with the portable music player 20 has been established for the second time or later.

  When a communication link is established for a certain portable music player 20 after the second time, the control unit 10 controls the wireless communication unit 15 to acquire the own list information data 27A of the portable music player 20. Based on the acquired own list information data 27A, the list information table 30 related to the portable music player 20 is updated. Specifically, when the self-list information data 27A includes data indicating the music information related to the new music data, a new record is generated in the list information table 30 based on the music information, When the music information related to the existing music data is deleted from the own list information data 27A, the record related to the music data in the list information table 30 is deleted.

Next, the screen displayed on the display unit 12 until the user selects a song to be played in the communication playback mode, which is an operation mode for playing the song data recorded on the portable song playback device 20. Will be described with reference to FIG.
In the normal playback mode, first, a screen for selecting a category is displayed on the display unit 12 as shown in FIG. In the present embodiment, there are artists, albums, and music as categories, and the user selects a category by touching a location where the category related to the music to be selected is displayed. Reference numeral 41 denotes a scroll button for scrolling information displayed in a list on the display unit 12, and reference numeral 42 denotes a determination button for making various determinations.
In this embodiment, when a communication link is established between the in-vehicle device 1 and the portable music playback device 20, the operation mode shifts to the communication playback mode, and a screen for selecting a category on the display unit 12 (FIG. 5 ( A)) is displayed.

  After the user selects a category, screens corresponding to the user's selection are sequentially displayed. For example, if an album is selected as a category in FIG. 5A, a list of selectable albums is displayed on the display unit 12 (FIG. 5B), and one of the albums displayed in the list is displayed. When is selected, the music related to the selected album is displayed (FIG. 5C). Finally, the user selects one piece of music.

Next, the operation of the in-vehicle device 1 when a communication link is established with the portable music player 20 will be described using the flowchart shown in FIG.
First, the control unit 10 of the in-vehicle device 1 monitors whether or not a communication link has been established with the portable music player 20 (step SA1). When the communication link is established (step SA1: YES), the control unit 10 controls the wireless communication unit 15 to perform communication conforming to the Bluetooth standard with the portable music player 20, and the portable The unique identification information is acquired from the pattern music reproducing device 20 (step SA2).

  When the unique identification information is acquired, the control unit 10 refers to the unique identification information field 31a of the terminal identification table 31, and whether or not the unique identification information data indicating the acquired unique identification information is already stored in the unique identification information field 31a. Is determined (step SA3). Here, the unique identification information data is already stored, that is, a communication link has been established with the portable music player 20 related to the unique identification information in the past. In this case, the list information table 30 related to the portable music player 20 has already been generated.

  In step SA3, when the unique identification information data is not stored in the unique identification information field 31a (step SA3: NO), the control unit 10 starts generating the list information table 30 related to the portable music playback device 20. At this time, first, the control unit 10 stores unique identification information data indicating the unique identification information acquired in step SA2 in the unique identification information field 31a of the terminal identification table 31, and newly creates a list in the table name field 31b. The table name data indicating the name of the information table 30 is stored, and one new record is created (step SA4).

  Next, the control unit 10 controls the wireless communication unit 15 to acquire the own list information data 27A from the portable music player 20, and based on the data indicating the song information included in the acquired own list information data 27A. Then, the list information table 30 is generated (step SA5). When the creation of the list information table 30 is completed (step SA6: YES), the control unit 10 ends the process.

  On the other hand, in step SA3, when the unique identification information data is stored in the unique identification information field 31a (step SA3: YES), the control unit 10 controls the wireless communication unit 15 to control the portable type data. The own list information data 27A is acquired from the music reproducing device 20. Then, based on the data indicating the music information included in the acquired own list information data 27A, the list information table 30 related to the portable music player 20 is updated (step SA7), and when the update is completed (step SA8: YES). ), The process is terminated.

  Thus, in this embodiment, when the communication link with the portable music player 20 is established, the unique identification information data of the portable music player 20 is not stored in the terminal identification table 31, that is, When a communication link is established for the first time between the in-vehicle device 1 and the portable music playback device 20, a list information table 30 relating to the portable music playback device 20 is newly generated. On the other hand, when the unique identification information data of the portable music player 20 has already been stored in the terminal identification table 31, that is, when the list information table 30 related to the portable music player 20 has already been generated. Then, the list information table 30 is updated with information included in the newly acquired own list information data 27A (step SA7). Because of this configuration, the music information based on the latest music data is reliably obtained for both the portable music player 20 for which the communication link has been established for the first time and the portable music player 20 for which the communication link has been established in the past. Can be memorized.

  Next, when the processes of step SA5 and step SA6 are being executed, that is, when the unique identification information data is not stored in the unique identification information field 31a, the own list information data 27A is obtained from the portable music player device 20. A display mode of the display unit 12 while the list information table 30 is newly generated will be described with reference to FIG.

FIG. 7 is a diagram for explaining a display mode of the display unit 12 at the time of executing the processes of Step SA5 and Step SA6.
In step SA5, the wireless communication unit 15 is controlled to acquire the own list information data 27A from the portable music player 20, and the list information is based on the data indicating the song information included in the acquired own list information data 27A. While the table 30 is newly generated, the control unit 10 displays that the list information is being acquired on the display unit 12 as shown in FIG. Next, when the generation of the new list information table 30 is finished (step SA6: YES), the control unit 10 displays that the acquisition of the list information is finished (FIG. 7B). Thereafter, the control unit 10 displays a screen for selecting a category on the display unit 12.

  Next, when the processing of step SA7 and step SA8 is being executed, that is, when the unique identification information data is stored in the unique identification information field 31a, the own list information data 27A is acquired from the portable music player device 20. FIG. 8 shows a display mode of the display unit 12 while the list information table 30 according to the portable music player 20 is being updated based on the data indicating the music information included in the acquired own list information data 27A. It explains using.

FIG. 8 is a diagram for explaining a display mode of the display unit 12 at the time of executing the processes of Step SA7 and Step SA8.
As shown in FIG. 8A, even when the list information table 30 related to a portable music player 20 is being updated, a screen for selecting a category is displayed. At that time, the display unit 12 displays that the list information is being updated.
In FIG. 8A, when a category is selected and the music information is displayed in a list according to the selected category, the control unit 10 displays the music information list based on the list information table 30 being updated. Do.

  For example, in FIG. 8A, when an album is selected as a category, the control unit 10 includes the piece of music information based on the album name data stored in the album name field 30a of the list information table 30 being updated. A list of information indicating albums is displayed. At that time, as shown in FIG. 8 (B), a display indicating that the list information is currently being updated is displayed, and the displayed information is the music data actually stored in the portable music player 20. Notifying that the information does not necessarily match.

As described above, in this embodiment, when the music information is displayed as a list while the list information table 30 is being updated, the control unit 10 performs a list display based on the list information table 30 being updated. In this case, it is possible to control the wireless communication unit 15 to shorten the time required for the list display as compared with the case of acquiring information to be displayed in a list by communication conforming to the Bluetooth standard. it can.
When the update of the list information table 30 is completed, as shown in FIG. 8C, a message to that effect is displayed, and the music information displayed on the display unit 12 is actually portable for the user thereafter. It notifies that it is based on the music information memorize | stored in the music reproduction apparatus 20. FIG.

Next, during the update of the list information table 30, the user can reproduce the music or change the music being reproduced to the music by selecting the music displayed in the list on the display unit 12. The operation of the in-vehicle device 1 when instructed will be described with reference to the flowchart of FIG.
First, the control unit 10 monitors whether or not the update of the list information table 30 has been completed (step SB1). When the update is finished (step SB1: YES), the control unit 10 finishes the process. When the update has not ended (step SB1: NO), the control unit 10 selects whether or not the music displayed in the list is selected, and whether or not the reproduction of the music is instructed, or the music of the music being reproduced It is determined whether or not an instruction to change to music is given (step SB2).

  As described above, in the present embodiment, during the update of the list information table 30, the list display is performed based on the list information table 30 being updated, and the time required for the list display is shortened. However, in this case, although it is possible to reduce the time taken to display the list, music information related to music data that has already been deleted from the portable music player 20 and is not actually stored in the portable music player 20 A list can be displayed.

In step SB2, when reproduction of music is not instructed or when change of music being reproduced is not instructed (step SB2: NO), the control unit 10 returns the process to step SB1 and updates again. Is monitored (step SB1).
On the other hand, when the reproduction of the music is instructed or the change of the music being reproduced is instructed (step SB2: YES), the control unit 10 controls the wireless communication unit 15 so that the music data relating to the music is stored. Then, an inquiry is made as to whether or not it is stored in the portable music player 20 (step SB3).

As a result of the inquiry, when it is found that the music data is stored (step SB4: YES), the control unit 10 controls the wireless communication unit 15 to transfer the music data from the portable music playback device 20, The music related to the music data is reproduced by streaming (step SB5).
On the other hand, when it is determined as a result of the inquiry that the music data is not stored (step SB4: NO), the control unit 10 sends the music data related to the music selected on the display unit 12 to the portable music playback device 20. In addition to displaying that it is not stored, the music information related to the music data is deleted from the music information displayed in the list (step SB6).

As described above, in the present embodiment, the music data playback unit (playback unit) that plays back the music data (content) acquired from the portable music playback device 20 and the portable music playback device 20 in communication are stored. When the communication link is established with the portable music reproducing device 20 in the in-vehicle device 1 (content reproducing device) provided with a display unit 12 that displays a list of music information of the music related to the music data being recorded, this portable type The own list information data 27A is acquired from the music reproducing device 20, and the list information table 30 is generated based on the acquired own list information data 27A. The list information table 30 is stored in the storage unit 16 in association with the unique identification information for each portable music player 20.
When the music information of the music related to the music data stored in the portable music playback device 20 in communication is displayed as a list, the list display is based on the list information table 30 related to the portable music playback device 20. Done.
For this reason, when displaying the music information as a list, the wireless communication unit 15 is controlled to perform the communication in conformity with the Bluetooth standard and acquire the information to be displayed in the list before the list is displayed. The time required can be shortened.

  Further, in the present embodiment, when a communication link is established with the portable music playback device 20, the unique identification information data of the portable music playback device 20 is not stored in the terminal identification table 31, that is, the in-vehicle device. When a communication link is established for the first time between 1 and the portable music playback device 20, a list information table 30 relating to the portable music playback device 20 is newly generated. On the other hand, when the unique identification information data of the portable music player 20 has already been stored in the terminal identification table 31, that is, when the list information table 30 related to the portable music player 20 has already been generated. Then, the list information table 30 is updated with information included in the newly acquired own list information data 27A (step SA7). Because of this configuration, the music information based on the latest music data is reliably obtained for both the portable music player 20 for which the communication link has been established for the first time and the portable music player 20 for which the communication link has been established in the past. Can be memorized.

  In the present embodiment, when the list information table 30 is being updated and the information related to the music is displayed as a list, the control unit 10 displays the list based on the list information table 30 being updated. In this case, by controlling the wireless communication unit 15, it is possible to reduce the time required for the list display as compared with the case of acquiring information to be displayed in a list by communication complying with the Bluetooth standard.

<Second Embodiment>
Next, a second embodiment will be described.
In the present embodiment, when the list information table 30 is being updated and the music information is displayed in a list based on the list information table 30 being updated, the music data related to the music is stored in the portable music player 20. If the music data is not stored, it is prohibited to display a list of music information related to the music data. In this way, in practice, it is possible to prevent a list of music information related to music data that does not exist in the portable music player 20 and to improve user convenience. Hereinafter, the operation of the in-vehicle device 1 according to the present embodiment will be described using the flowchart of FIG.

FIG. 10 is a flowchart showing the operation of the in-vehicle apparatus 1 when the music information is displayed as a list on the display unit 12 while the list information table 30 is being updated. In the following description, a communication link is established between the in-vehicle device 1 and the portable music playback device 20, and after the communication link is established, the control unit 10 of the in-vehicle device 1 starts from the portable music playback device 20 itself. It is assumed that list information data 27A has been acquired.
First, the control unit 10 of the in-vehicle device 1 compares the acquired own list information data 27A with each data stored in the list information table 30 that is already stored (step SC1). Next, the control unit 10 identifies music data related to the music information stored in the list information table 30 and not stored in the portable music player 20 based on the comparison result. For example, when the music information related to the music data L is stored in the list information table 30 and the music data L is not already stored in the portable music player 20, the music data L is specified.
Next, the control unit 10 prohibits the display of music information list related to the music data identified in step SC2 (step SC3).

  As described above, in the present embodiment, when the music information is displayed as a list based on the list information table 30 being updated while the list information table 30 is being updated, the music information is actually stored in the portable music player 20. No music data is specified and the music information related to the specified music data is prohibited from being displayed in a list. Thus, in practice, the music information related to the music data not stored in the portable music player 20 is prevented from being displayed in a list, and the convenience of the user is improved.

<Third Embodiment>
Next, a third embodiment will be described.
In the present embodiment, the configuration of the list information table 30 of the first embodiment described above is different.

FIG. 11 is a diagram schematically showing the configuration of the list information table 50 according to the present embodiment.
In one record of the list information table 50, in addition to the album name field 50a, the song name field 50b, and the artist name field 50c, which are fields in which data similar to the list information table 30 is stored, the first unique identification An information field 50d, a second unique identification information field 50e, and a third unique identification information field 50f are included.
In these first unique identification information field 50d, second unique identification information field 50e and third unique identification information field 50f, the music information (album name, song name, artist name) of the record is acquired. Data indicating the unique identification information of the pattern music reproducing device 20 is stored. That is, in a certain record, the portable music player 20 having the unique identification information indicated by the data stored in the first unique identification information field 50d, the second unique identification information field 50e, and the third unique identification information field 50f. Means that music data related to the music information of the record is stored.

Here, referring to the first record of the list information table 50 shown in FIG. 11, data indicating the unique identification information “X” is stored in the second unique identification information field 50e in the first unique identification information field 50d. Stores data indicating the unique identification information “Y”. Therefore, the music data related to the music information (album name “AAA”, music name “A1”, and artist name “AAAA”) of the record is stored in the portable music player 20X and the portable music player 20Y. It will be stored in both. In this case, when the list information table 30 is generated for each portable music player 20 as in the first embodiment, the same music information in the X list information table 30X and the Y list information table 30Y. Will be generated. However, in the present embodiment, only one record having the same music information is generated in the list information table 50, and the storage efficiency can be improved.
As described above, according to this embodiment, it is possible to prevent records having the same music information from being stored in different list information tables 30, and to improve the storage efficiency in the storage unit 16.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
For example, in the above-described embodiment, the invention has been described by taking as an example the case where the portable music playback device 20 stores music data as content, but the content is not limited to music data, but video data, image data, and the like. Other content may be used.

It is a block diagram which shows the functional structure of the vehicle-mounted apparatus which concerns on 1st Embodiment. It is a block diagram which shows the functional structure of a portable music reproducing apparatus. It is a figure which shows the structure of a terminal identification table typically. It is a figure which shows the structure of a list information table typically. It is a figure for demonstrating the screen displayed on the display part until a user selects the music which should be reproduced | regenerated. It is a flowchart which shows operation | movement of a vehicle-mounted apparatus. It is a figure for demonstrating the screen displayed on the display part while producing | generating the list information table newly. It is a figure for demonstrating the screen displayed on the display part during the update of a list information table. It is a flowchart which shows operation | movement of a vehicle-mounted apparatus. It is a flowchart which shows operation | movement of the vehicle-mounted apparatus which concerns on 2nd Embodiment. It is a figure which shows typically the structure of the list information table which concerns on 3rd Embodiment.

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 10 Control part (list information acquisition means)
12 Display section (display means)
16 Storage unit (storage means)
17 Music data playback section (playback means)
20, 20X, 20Y Portable music player (terminal)
27A Own list information data

Claims (6)

In a content reproduction apparatus comprising: a reproduction unit that communicates with a terminal that stores a plurality of contents and reproduces content acquired from the terminal; and a display unit that displays a list of contents stored in the terminal in communication.
List information acquisition means for acquiring list information to be used for displaying a list of contents stored in the terminal at the time of establishing a communication link with the terminal;
Storage means for storing the list information acquired from the terminal by the list information acquisition means in association with information indicating the terminal;
The display means displays a list based on list information stored in association with information indicating the terminal by the storage means when displaying the contents stored in the terminal in communication. A content playback device. When a communication link is established with the terminal, and new list information, which is new list information, is acquired from the terminal by the list information acquisition unit,
The storage means
If the information indicating the terminal is not stored by the storage means, the new list information is stored in association with the information indicating the terminal,
When the information indicating the terminal is stored by the storage unit, the old list information, which is already stored in association with the information indicating the terminal, is updated with the new list information. The content reproduction apparatus according to claim 1. While the storage means is updating the old list information with the new list information, to display a list of content stored in the terminal in communication,
The content reproduction apparatus according to claim 2, wherein the display unit displays a list based on the old list information. While the storage means is updating the old list information with the new list information, to display a list of content stored in the terminal in communication,
The content reproduction apparatus according to claim 2 or 3, wherein content included in the old list information and not stored in the terminal is specified, and list display of the specified content is prohibited. When the plurality of terminals store the same content, and when the list information acquisition unit acquires the list information of the content from each of the plurality of terminals,
The content reproduction apparatus according to any one of claims 1 to 4, wherein the storage unit stores the list information of the content in association with information indicating the plurality of terminals in one database. A method for controlling a content playback apparatus, comprising: playback means for communicating with a terminal storing a plurality of contents and playing back the content acquired from the terminal; and display means for displaying a list of contents stored in the communicating terminal Because
When establishing a communication link with the terminal, list information to be used for displaying a list of all contents stored in the terminal is acquired from the terminal, and the acquired list information is associated with information indicating the terminal. And remember
When a list of contents stored in a communicating terminal is displayed, a list display is performed based on list information stored in association with information indicating the terminal by the storage unit. Control method.

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