JP2012089193A - Media reproducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily retrieve desired music data from a music list even without a retrieval function corresponding to a predetermined hierarchy structure.SOLUTION: A media reproducer 10 for reproducing media data stored in an external media 20: detects whether the external media 20 is connected; creates a folder to store whole media data information 14b associated with all of the media data, when detecting the connection of the external media 20; creates the whole media data information 14b in the folder; and reproduce the media data on the basis of the created whole media data information 14b.

Description

  The present invention relates to a media playback device for playing back media data stored in an external medium.

  2. Description of the Related Art Conventionally, media playback apparatuses that play back media data stored in external media such as a USB (Universal Serial Bus) memory and an SD (Secure Digital) card are known. Media data refers to, for example, music data and video data.

  For example, Patent Literature 1 discloses a media playback device that reads a shortcut file stored in a folder in an external medium, specifies a music data storage destination, and plays back the music data at the specified storage destination. . Note that the shortcut file refers to a file including information regarding a storage location of a predetermined file.

  Specifically, the media playback device described in Patent Literature 1 creates a song list of song data based on the shortcut file, and plays the song data according to the playback order of the created song list.

JP 2009-123309 A

  However, since the conventional media playback device depends on the management configuration of folders and files stored in external media, there is a problem that not only the search operation becomes complicated, but also the versatility is low.

  Specifically, a tree structure is widely adopted as a management configuration for folders and files stored in external media. The tree structure is a structure in which a form in which a predetermined element has child elements and a child element has a plurality of grandchild elements is formed across a plurality of hierarchies.

  For this reason, when searching for a predetermined piece of music from a music list by a conventional media playback device, the search operation must be performed across a plurality of hierarchies, and the search operation becomes complicated.

  Also, the conventional media playback device cannot search and play back music if the media playback device that has a management configuration for folders and files stored in the USB memory is not readable. There was a problem.

  Therefore, even if the search function corresponding to the predetermined hierarchical structure is not provided, desired music data can be easily searched from the music list, and the versatile media playback device How to achieve this is a big issue.

  The present invention has been made to solve the above-described problems caused by the prior art, and even when a search function corresponding to a predetermined hierarchical structure is not provided, desired music data can be obtained from a music list. An object of the present invention is to provide a versatile media playback device that can be easily searched.

  In order to solve the above-described problems and achieve the object, the present invention provides a media playback device for playing back media data stored in an external media, wherein the external media detects whether or not the external media is connected. A detection unit; a folder creation unit for creating a folder for storing all media data information relating to all the media data when the external media detection unit detects that the external media is connected; and the all media All media data information creating means for creating data information in the folder, and playback means for playing the media data based on the all media data information created by the all media data information creating means Features.

  ADVANTAGE OF THE INVENTION According to this invention, even if it does not have a search function corresponding to a predetermined hierarchical structure, desired music data can be easily searched from a music list, and highly versatile media playback There exists an effect that an apparatus can be provided.

FIG. 1 is a diagram illustrating an outline of the in-vehicle audio apparatus according to the present embodiment. FIG. 2 is a block diagram illustrating a configuration of the in-vehicle audio apparatus according to the present embodiment. FIG. 3 is a diagram showing an example of all music information. FIG. 4 is a diagram illustrating an example of a search operation screen. FIG. 5 is a flowchart showing an overview of the entire music information creation processing procedure executed by the in-vehicle audio apparatus. FIG. 6 is a flowchart showing an outline of a search processing procedure executed by the in-vehicle audio device. FIG. 7 is a diagram illustrating a configuration example of folder information. FIG. 8 is a diagram illustrating an example of a search operation screen. FIG. 9 is a block diagram showing a configuration of the in-vehicle audio apparatus and the USB memory according to the modification. FIG. 10 is a diagram for explaining a USB memory according to a modification.

  Hereinafter, preferred embodiments of a media playback apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following, the outline of the media playback apparatus according to the present invention will be described with reference to FIG. 1, and then an embodiment of the media playback apparatus according to the present invention will be described with reference to FIGS.

  First, an outline of a media playback apparatus according to the present invention will be described with reference to FIG. FIG. 1 is a diagram showing an outline of a media playback apparatus according to the present invention. In the present embodiment, the case where the media playback device is applied to an in-vehicle audio device mounted on a vehicle will be described, but the present invention can also be applied to a DVD playback device and other media playback devices.

  Generally, a tree structure is widely adopted as a folder structure for managing folders and files stored in a USB memory. In each folder of the USB memory, a music list and music data corresponding to the music list are stored.

  For example, as shown in “USB memory” in FIG. 1, it is assumed that the USB memory includes a root folder in the highest hierarchy, and includes a folder A and a folder C in a lower layer of the root folder. . Furthermore, it is assumed that folder B is included in the lower layer of folder A, and folder D and folder E are included in the lower layer of folder C.

  In addition, the music list includes a music name, a music length (time), or a participating artist name corresponding to the music data. In this case, the conventional in-vehicle audio apparatus creates a music list of music data stored in the USB memory based on the shortcut file stored in the folder in the USB memory.

  Note that a shortcut file refers to a file that includes information about a storage location of a predetermined file and that can reproduce predetermined music data. And the conventional vehicle-mounted audio apparatus reproduces music data according to the reproduction order of the created music list.

  However, the shortcut file has a format depending on the USB memory, the USB memory folder and software for managing the file, and the like. For this reason, the in-vehicle audio apparatus must prepare a mechanism for reading such a file for each shortcut file format. Therefore, the vehicle audio apparatus according to the present invention employs a technique that can be realized without reading a shortcut file.

  Further, when searching for predetermined music data from a music list, the conventional in-vehicle audio apparatus follows the music list in the folder across a plurality of hierarchies, which makes the search operation complicated. Specifically, when searching for music data included in the music list stored in the folder D, the conventional in-vehicle audio apparatus spans three layers from the root folder to the folder D via the folder C. It was necessary to search (see “USB memory” in FIG. 1).

  In addition, every time a conventional in-vehicle audio apparatus searches for predetermined music data, it must perform a search process until a desired music data is found for a folder across multiple hierarchies. Will be.

  Therefore, the in-vehicle audio apparatus according to the present invention can collectively refer to all music lists by storing the music lists stored in each folder of the USB memory in a predetermined folder. I did it. In addition, the in-vehicle audio apparatus according to the present invention manages each folder of the USB memory and a folder for storing all the music lists (hereinafter referred to as “ALL folder”) in the same hierarchy.

  Specifically, as shown in (1) of FIG. 1, when the in-vehicle audio apparatus according to the present invention detects that a USB memory is connected, first, all folders of the USB memory are managed in the same hierarchy. It was decided to. Each folder managed to the same level by the in-vehicle audio apparatus according to the present invention includes a music list corresponding to each folder.

  Further, the in-vehicle audio apparatus according to the present invention creates an ALL folder (see (2) in FIG. 1), and creates all music information about all the songs in the USB memory in the ALL folder (see (3) in FIG. 1). ). Note that all music information is information including a whole music list, and details will be described later.

  And the vehicle-mounted audio apparatus which concerns on this invention will display the all music list of an ALL folder on a display part, if the search operation of a predetermined music is received. As a result, the user can easily search for and play the desired music from the entire music list (see (4) in FIG. 1).

  Thus, the in-vehicle audio apparatus according to the present invention can display all music pieces collectively by creating all music information in the ALL folder. Thus, when searching for a predetermined music, it is only necessary to search based on a list of all music created in advance, and the user can easily search for and select a desired music.

  In addition, since the in-vehicle audio device according to the present invention manages all the folders of the USB memory in the same hierarchy, even when searching for music in folder units, the plurality of hierarchies are not moved up and down. Can easily search for folders.

  Furthermore, the vehicle-mounted audio apparatus according to the present invention reproduces music based on the entire music list even when all music are randomly reproduced. For this reason, the vehicle-mounted audio apparatus according to the present invention does not need to search and select a piece of music to be randomly selected across a plurality of hierarchies for each piece of music, and can easily select a piece of music.

  Further, in the in-vehicle audio apparatus according to the present invention, it is not necessary to refer to the USB memory every time a search operation is performed. As a result, the in-vehicle audio device according to the present invention can reduce the processing time for the search and reduce the processing load on the in-vehicle audio device.

  Furthermore, the in-vehicle audio apparatus according to the present invention does not require a shortcut file stored in the USB memory. Therefore, even if the device cannot read the shortcut file, it is possible to reproduce desired music data and to improve versatility.

  Below, the Example about the vehicle-mounted audio apparatus 10 based on this invention demonstrated using FIG. 1 is described in detail. First, the configuration of the in-vehicle audio apparatus 10 according to the present embodiment will be described with reference to FIG.

  FIG. 2 is a block diagram illustrating a configuration of the in-vehicle audio apparatus 10 according to the present embodiment. In FIG. 2, only components necessary for explaining the feature points of the in-vehicle audio device 10 are described.

  As shown in FIG. 2, the in-vehicle audio device 10 that reproduces music data stored in the USB memory 20 includes a communication I / F (interface) 11, a display operation unit 12, a speaker 13, a storage unit 14, And a control unit 15. In addition, the control unit 15 includes a USB detection unit 15a, a folder information registration unit 15b, an ALL folder creation unit 15c, an all music information creation unit 15d, a deletion processing unit 15e, an operation reception unit 15f, and a music data reproduction. The storage unit 14 stores folder information 14a and all music information 14b.

  The communication I / F 11 includes a communication device that transmits and receives communication data between the in-vehicle audio apparatus 10 and the USB memory 20. For example, the communication I / F 11 receives information about a folder from the USB memory 20 when the folder information registration unit 15b registers the folder information 14a.

  The display operation unit 12 includes a display unit that displays the entire music list and an operation unit that receives a music or folder selection operation. Note that there is no need to limit the display unit of the display operation unit 12 or the components that perform audio output. Therefore, a touch panel type liquid crystal display that accepts an input by pressing a finger or a pointing device and also serves as a display output may be used.

  The speaker 13 is an output unit that accesses the music data stored in the USB memory 20 by the music data reproducing unit 15g and outputs the reproduced sound.

  The storage unit 14 is a storage unit configured by a storage device such as a nonvolatile memory or a hard disk drive. The storage unit 14 stores the folder information received from the USB memory 20 and the ALL folder for storing the entire music list as the folder information 14a. Moreover, the memory | storage part 14 memorize | stores the information regarding all the music as all the music information 14b. The details of the total music information 14b will be described later.

  The control unit 15 is a control unit that performs overall control of the in-vehicle audio device 10. The USB detection unit 15a is a processing unit that performs a process of detecting whether or not the USB memory 20 is connected via the communication I / F 11.

  If the USB detection unit 15a detects that the USB memory 20 is connected, the USB detection unit 15a also performs a process of passing the folder information received from the USB memory 20 to the folder information registration unit 15b. In addition, if the USB detection unit 15a detects that the USB memory 20 is disconnected, the USB detection unit 15a also includes a process of passing an instruction to delete the folder information 14a and the entire music information 14b stored in the storage unit 14 to the deletion processing unit 15e. Do it.

  The folder information registration unit 15b is a processing unit that performs processing for parallelizing all folders in the USB memory 20 to the same hierarchy and registering them in the folder information 14a based on the folder information received from the USB memory 20.

  Further, the folder information registration unit 15b performs a process of registering a music list corresponding to each folder in each of the parallel folders and transferring an ALL folder creation instruction to the ALL folder creation unit 15c.

  When the ALL folder creation unit 15c receives an ALL folder creation instruction from the folder information registration unit 15b, the ALL folder creation unit 15c performs processing to create an ALL folder in the same hierarchy as the folder registered in the folder information 14a by the folder information registration unit 15b. It is a processing unit. The ALL folder creation unit 15c also performs a process of passing a creation instruction for the all-music information 14b to the all-music information creation unit 15d.

  If all music information creation unit 15d receives an instruction to create all music information 14b from ALL folder creation unit 15c, it is a processing unit that performs processing to create all music information 14b including the whole music list in the ALL folder. is there.

  The deletion processing unit 15e is a processing unit that deletes the folder information 14a and the entire music information 14b upon receiving an instruction to delete the folder information 14a and the entire music information 14b from the USB detection unit 15a.

  The operation accepting unit 15f is a processing unit that performs a process of acquiring the entire music list from the all music information 14b and displaying it on the display operating unit 12 when the music selecting operation based on the entire music list is received from the display operating unit 12. is there.

  Then, if the operation receiving unit 15f receives a reproduction instruction for a music piece by selecting a predetermined music piece from the entire music list displayed on the display operation unit 12, the operation reception unit 15f sends the reproduction instruction together with the selected music name to the music data. It is passed to the playback unit 15g.

  In addition, when the operation receiving unit 15f receives a music playback operation in units of folders from the display operation unit 12, the operation receiving unit 15f performs a process of displaying the folder names included in the folder information 14a on the display operation unit 12 in parallel. It is.

  Then, if the operation accepting unit 15f accepts an instruction to reproduce the music list in the folder by selecting a predetermined folder from the folder name displayed on the display operation unit 12, the operation accepting unit 15f instructs to reproduce the selected folder name together with the selected folder name. To the music data playback unit 15g.

  When the music data playback unit 15g receives a playback instruction from the operation reception unit 15f, the music data playback unit 15g accesses the music data in the folder stored in the USB memory 20 to play back the sound and output it to the speaker 13 Part.

  Next, details of the total music information 14b stored in the storage unit 14 will be described with reference to FIG. FIG. 3 is a diagram showing an example of all music information.

  As shown in FIG. 3, the total music information 14b includes a “number” item, a “folder name” item, a “music list” item, and an “address” item. The “number” item is the display order of the folders, and the “folder name” item is the name of the folder stored in the USB memory 20, and all folders in the USB memory 20 are managed in parallel as the “folder name” item. .

  The “music list” item is a music list stored in the folder of the “folder name” item. For example, the music name is stored as shown in FIG. In addition, all the music lists memorize | stored in all the music information 14b are set as an all music list.

  The “address” item is information indicating a storage location of music data corresponding to each music included in the music list, and here indicates a storage location of music data stored in the USB memory 20. For example, “usb ¥” is stored in the “address” item corresponding to the root folder, and this indicates that music data corresponding to the music list of the root folder is stored at this address.

  Next, details of the music list search operation screen displayed on the display operation unit 12 will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of a search operation screen.

  (A-1) and (B-1) in FIG. 4 are lists of folders displayed on the display operation unit 12, and (A-2) and (B-2) in FIG. 4 are the selected folders. Is a music list corresponding to.

  As shown in (A-1) of FIG. 4, when receiving a music search operation, the display operation unit 12 displays a list of “folder names” including the ALL folder stored in the all music information 14 b. .

  Note that the list of “folder names” is composed of selection buttons in which the folder names are described, and the operation receiving unit 15f performs the selection operation of the folders by pressing a selection button of a predetermined folder name. It will be accepted.

  For example, if the folder A is selected by the user, the operation reception unit 15f acquires the music list stored in the folder A from the total music information 14b and displays it on the display operation unit 12 ((A- in FIG. 4). 2)).

  When the replay operation of the music list of the folder A is performed, the music data playback unit 15g is stored in the USB memory 20 based on the address corresponding to the folder A stored in the all music information 14b. The music data in folder A is accessed and output to the speaker 13 in the order displayed in the music list.

  When a random playback operation of the music list of folder A is performed, the music data playback unit 15g randomly accesses the music data of folder A stored in the USB memory 20 in the same manner as described above, and the speaker 13 Output to.

  Further, when a predetermined music is selected from the music list of the folder A displayed on the display operation unit 12 and a reproduction operation is performed, the music data reproduction unit 15g is selected to be stored in the total music information 14b. The music data stored in the USB memory 20 is accessed based on the address corresponding to the received music and is output to the speaker 13.

  As shown in (B-1) of FIG. 4, the in-vehicle audio device 10 outputs music data of folders other than the ALL folder to the speaker 13 when repeated playback operations of all folders are performed. .

  As shown in FIG. 4B, a case where there are eight songs in the song list of the root folder will be described. It is assumed that the first song name: aaa, the second song name: bbb, and the eighth song name: ccc.

  Here, when the ALL folder is selected, the operation accepting unit 15f acquires the all music list from the all music information 14b, and displays the acquired all music list on the display operation unit 12 ((B- in FIG. 4). 2)).

  As shown in (B-2) of FIG. 4, the entire music list displayed on the display operation unit 12 includes the music list of all folders such as the music list of the root folder and the music list of the folder A. It will be displayed all at once. And the vehicle-mounted audio apparatus 10 performs a process according to the repeated reproduction operation of all the music lists performed by the user and the search operation based on the all music lists.

  Next, details of the reproduction processing of the music data stored in the USB memory executed by the in-vehicle audio device 10 will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing an overview of the entire music information creation processing procedure executed by the in-vehicle audio device 10, and FIG. 6 is a flowchart showing an overview of the search processing procedure executed by the in-vehicle audio device 10.

  First, in FIG. 5, the ALL folder creation process executed by the in-vehicle audio device 10 when the USB detection unit 15a detects the connection or disconnection of the USB memory 20 will be described. The music data search process executed by will be described.

  As shown in FIG. 5, the USB detection unit 15a detects a change in the connection state of the USB memory 20 (step S101). When the USB detection unit 15a detects a change in the connection state of the USB memory 20 (step S101, Yes), the USB detection unit 15a determines whether the USB memory 20 is connected (step S102).

  On the other hand, when the change in the connection state of the USB memory 20 is not detected (No in step S101), the USB detection unit 15a continuously monitors the change in the connection state of the USB memory 20.

  If it is determined in step S102 that the USB memory 20 is connected (Yes in step S102), the folder information registration unit 15b acquires folder information from the USB memory 20 (step S103).

  Then, the folder information registration unit 15b parallelizes all the folders of the USB memory 20 to the same hierarchy based on the folder information acquired from the USB memory 20, and registers them in the folder information 14a (step S104).

  Thereafter, the ALL folder creation unit 15c creates an ALL folder in the same hierarchy as the folder registered in the folder information 14a by the folder information registration unit 15b (step S105).

  Subsequently, the all-music information creating unit 15d creates all-music information 14b including the all-music list in the ALL folder (step S106), and ends a series of all-music information creating processing executed by the in-vehicle audio device 10.

  If it is determined in step S102 that the USB memory 20 has been disconnected (No in step S102), the deletion processing unit 15e deletes the entire music information 14b and the ALL folder (step S107, step S108), and the in-vehicle audio. A series of all music information creation processing executed by the apparatus 10 is terminated.

  In the above-described embodiment, when it is determined that the USB memory 20 is disconnected, the deletion processing unit 15e deletes the entire music information 14b and the ALL folder. However, the in-vehicle audio device 10 may not delete the entire music information 14b and the ALL folder.

  In this case, if it is determined that the USB memory 20 is connected and the predetermined condition is satisfied, the in-vehicle audio device 10 reuses the entire music information 14b and the ALL folder stored in the storage unit 14. The predetermined condition is an identifier for uniquely identifying the USB memory 20, for example, a serial number, which is the same as the USB memory 20 connected last time, and the contents of the folder of the USB memory 20. Assume that the content stored in the storage unit 14 matches.

  On the other hand, the in-vehicle audio device 10 determines that the USB memory 20 is connected, but if the predetermined condition is not satisfied, the in-vehicle audio device 10 newly sets the all music information 14b and the ALL folder based on the information of the folder in the USB memory 20. It will be created.

  Next, a music data search processing procedure executed by the in-vehicle audio device 10 will be described. Here, a case where search processing is performed in units of folders and music data in the folders is reproduced will be described.

  As illustrated in FIG. 6, if the operation reception unit 15 f receives a music data search operation, the operation reception unit 15 f acquires folder information 14 a (step S <b> 201), and all folders including an ALL folder based on the acquired folder information 14 a. Is displayed (step S202).

  Then, the operation accepting unit 15f determines whether or not the user has selected a folder that the user desires to reproduce (step S203). If it is determined that no folder has been selected (step S203, No), The determination process in step S203 is repeated.

  On the other hand, when it is determined that any one of the folders has been selected (step S203, Yes), the operation receiving unit 15f determines whether the selected folder is an ALL folder (step S204).

  If the selected folder is the ALL folder (step S204, Yes), the music data playback unit 15g accesses the music data of the entire music list stored in the USB memory 20 (step S205).

  If the selected folder is not an ALL folder (step S204, No), the music data playback unit 15g accesses the music data in the music list corresponding to the selected folder stored in the USB memory 20 (step S204). S207).

  Thereafter, the music data reproducing unit 15g reproduces the sound of the accessed music data, outputs it to the speaker 13 (step S206), and ends a series of search processes executed by the in-vehicle audio device 10.

  As described above, the in-vehicle audio device 10 according to the present invention parallelizes all the folders of the USB memory 20 to the same hierarchy based on the folder information received from the USB memory 20, and each folder that is parallelized has its respective folder. Register the music list corresponding to.

  The in-vehicle audio apparatus 10 according to the present invention creates an ALL folder in the same hierarchy as the parallel folder, and creates all music information 14b including a music list of all music in the ALL folder. Thereby, the vehicle-mounted audio apparatus 10 according to the present invention does not need to change the management configuration of folders and files registered in the USB memory 20.

  Furthermore, the in-vehicle audio apparatus 10 according to the present invention can display all the music collectively based on the entire music list. Therefore, even when the search function corresponding to the predetermined hierarchical structure is not provided, the user can easily search for desired music data from the entire music list.

  Moreover, the vehicle-mounted audio apparatus 10 according to the present invention reproduces music based on the entire music list even when all music are randomly reproduced. For this reason, the vehicle-mounted audio apparatus 10 according to the present invention does not need to search and select across a plurality of hierarchies every time a music is randomly selected, and can easily select a music.

  Furthermore, the in-vehicle audio apparatus 10 according to the present invention can perform a search based on an all music list included in the all music information 14b created in advance when searching for a predetermined music. Therefore, in the in-vehicle audio device 10 according to the present invention, it is not necessary to refer to the USB memory 20 every time the search is performed. Thereby, the vehicle-mounted audio apparatus 10 which concerns on this invention can shorten the processing time concerning a search, and can reduce the processing load to the vehicle-mounted audio apparatus 10. FIG.

  In addition, since the in-vehicle audio device 10 according to the present invention stores all folders of the USB memory 20 in the same hierarchy and manages them in parallel, even when searching for music in folder units, a plurality of hierarchies are stored. It is possible to easily search in the same hierarchy without straddling.

  Up to now, based on the folder information acquired from the USB memory 20, all folders in the USB memory 20 are parallelized in the same hierarchy and registered in the folder information 14a, so that folders including ALL folders can be referred to in parallel. However, in addition to the above-described configuration, various different folder information 14a configurations may be used.

  Below, the structure of the folder information which the vehicle-mounted audio apparatus which concerns on a modification produces is demonstrated using FIG. 7 and FIG. FIG. 7 is a diagram illustrating a configuration example of folder information, and FIG. 8 is a diagram illustrating an example of a search operation screen.

  First, FIG. 7 describes the configuration of the folder information according to the modified example, and FIG. 8 describes an example of a music data search operation screen when the folder information is configured.

  As shown in FIG. 7, the in-vehicle audio device according to the modification is registered in the folder information with the same tree structure as the folder and file management configuration stored in the USB memory 20 for all folders in the USB memory 20. This is different from the above embodiment.

  Further, the in-vehicle audio apparatus according to the modified example creates an ALL folder in the highest layer of the folder registered in the folder information, that is, the same layer as the root folder, and stores the entire music information 14b including the entire music list in the ALL folder. To create.

  By doing so, it becomes possible to display all the songs in parallel by the all song list in the ALL folder without changing the management configuration of the folder of the USB memory 20, and the user can easily select the desired song. You can search and select. In this case, an example of a music list search operation screen displayed on the display operation unit 12 will be described with reference to FIG.

  As shown in FIG. 8A, when the on-vehicle audio apparatus according to the modification receives a music search operation, the highest folder registered in the folder information (here, the root folder) and the ALL folder Is displayed. Note that a “⇒” button described between the root folder and the ALL folder is an operation button for transitioning to a lower layer of the root folder.

  Here, if the “⇒” button is selected by the user, the in-vehicle audio device according to the modified example displays the folder A and the folder C located in one layer below the root folder on the display operation unit 12. (See FIG. 8B).

  If the “⇒” button between the folder A and the folder C is selected by the user, the in-vehicle audio device according to the modified example transfers the folder B located in one layer below the folder A to the display operation unit 12. Display (see FIG. 8C).

  Furthermore, if the folder B is selected, the in-vehicle audio device according to the modified example accesses the music data in the music list of the folder B stored in the USB memory 20 and outputs the reproduced sound to the speaker 13. Become.

  In the above-described embodiment and modification, the music data in the music list stored in the USB memory 20 is accessed and the reproduced sound is output to the speaker 13. However, the present invention is not limited to this. Hereinafter, configurations of the in-vehicle audio device 10 ′ and the USB memory 20 according to the modification will be described with reference to FIG. 9.

  FIG. 9 is a block diagram showing configurations of the in-vehicle audio device 10 ′ and the USB memory 20 according to the modification. In FIG. 9, only components necessary for describing the feature points of the in-vehicle audio device 10 ′ and the USB memory 20 according to the modification are illustrated. In addition, the description of the portion that exhibits the same function as in FIG. 2 will be omitted, and a different function will be described.

  The in-vehicle audio device 10 ′ according to the modification shown in FIG. 9 stores the music data stored in the USB memory 20 in the storage unit 14 ′ of the own device in advance, and the music data stored in the storage unit 14 ′. The point which reproduces 14c differs from the above-mentioned example.

  As shown in FIG. 9, the in-vehicle audio device 10 ′ includes a speaker 13, a storage unit 14 ′, and a control unit 15 ′. The control unit 15 ′ further includes a folder information registration unit 15 b ′ and a music data reproduction unit 15 g ′, and the storage unit 14 ′ stores the music data 14 c. On the other hand, the USB memory 20 includes a storage unit 21, and the storage unit 21 stores music data 21a.

  The folder information registration unit 15b ′ receives folder information from the USB memory 20, and performs processing for registering all the folders in the USB memory 20 in the same hierarchy and registering them in the folder information 14a based on the received folder information. Part.

  Further, the folder information registration unit 15b ′ registers the music list corresponding to each folder in each of the parallel folders, and receives the music data 21a corresponding to the music list in all folders from the USB memory 20. Processing is also performed.

  Then, the folder information registration unit 15b ′ stores the received music data 21a in the storage unit 14 ′ as music data 14c, and stores it in the “address” item of the folder information 14a described in FIG. The storage location of the music data to be played is registered.

  Furthermore, when the all-music information creating unit 15d creates all-music information 14b including the all-music list in the ALL folder, the music data 14c corresponding to the all-music list is parallelized in the ALL folder of the storage unit 14 ′. Remember.

  On the other hand, when the music data playback unit 15g ′ receives a playback instruction from an operation receiving unit 15f (not shown), the music data playback unit 15g ′ accesses the music data 14c stored in the storage unit 14 ′, plays back the sound, and outputs it to the speaker 13. A processing unit that performs processing.

  By storing the music data in the in-vehicle audio device 10 ′ in advance as described above, it is not necessary to access the USB memory 20 every time the music data is reproduced, and the time and processing load required for the reproduction process can be reduced. it can.

  In the above-described embodiment and modification, the ALL folder creation unit 15c creates an ALL folder in the storage unit 14 of the in-vehicle audio device 10, and the all-music information creation unit 15d creates all-music information 14b including the all-music list. It was decided to.

  However, in addition to the above-described configuration, the device configuration for creating the ALL folder may be implemented in various different configurations. Below, the structure of the ALL folder which the vehicle-mounted audio apparatus which concerns on a modification produces is demonstrated using FIG. FIG. 10 is a diagram for explaining a USB memory according to a modification.

  As shown in FIG. 10, the in-vehicle audio apparatus according to the modified example creates an ALL folder in the USB memory, and creates all music information 14b including a whole music list in the created ALL folder. Is different.

  The in-vehicle audio apparatus according to the modification stores music data corresponding to all music lists in parallel in an ALL folder created in the storage unit of the USB memory. By doing in this way, the vehicle-mounted audio apparatus which concerns on a modification does not need to memorize | store all the music information 14b and music data which contain all the music lists in the vehicle-mounted audio apparatus side. Therefore, the storage capacity of the in-vehicle audio device according to the modification can be reduced, and the manufacturing cost for the in-vehicle audio device can be suppressed.

  In the above-described embodiments and modifications, the case where the present invention is applied to an in-vehicle audio device that reproduces music data stored in an external medium such as a USB memory or an SD card has been described. It can also be applied to.

  In the above-described embodiments and modifications, the case where the present invention is applied to a vehicle-mounted audio device mounted on a vehicle has been described. However, the present invention is not necessarily limited to a vehicle-mounted device, and may be implemented by various different media playback devices. Is.

DESCRIPTION OF SYMBOLS 10 Car audio system 12 Display operation part 13 Speaker 14 Memory | storage part 14a Folder information 14b All music information 15 Control part 15a USB detection part 15b Folder information registration part 15c ALL folder creation part 15d All music information creation part 15e Deletion process part 15f Operation reception 15g Music data playback unit 10 'Car audio system 13' Speaker 14 'Storage unit 14c Music data 15' Control unit 15b 'Folder information registration unit 15g' Music data playback unit 20 USB memory 21 Storage unit 21a Music data

Claims (7)

A media playback device for playing back media data stored in external media,
External media detection means for detecting whether or not the external media is connected;
A folder creating means for creating a folder for storing all media data information relating to all the media data when connection of the external media is detected by the external media detecting means;
All media data information creating means for creating all the media data information in the folder;
A media playback apparatus comprising: playback means for playing back the media data based on the all media data information created by the all media data information creation means. The folder creation means includes:
When a folder stored in the external medium is configured across a plurality of layers, a folder corresponding to the folder stored in the external medium is created in the same layer as the folder storing the all media data information. The media playback device according to claim 1, wherein The all media data information creating means includes:
3. The media playback apparatus according to claim 1, wherein the entire media data information including a storage destination of the media data is created in a storage unit included in the media playback apparatus. The all media data information creating means includes:
The media playback device according to claim 1 or 2, wherein the entire media data information including the media data itself is created in a storage unit included in the media playback device. 2. The storage instructing unit for instructing to store the all media data information in the folder created by the all media data information creating unit in a storage unit included in the external medium. 2. The media playback device according to 2. A display operation means for receiving a display and selection operation of a folder storing the all media data information,
The all media data information creating means includes:
6. The medium according to claim 1, wherein when the selection operation of the folder storing the all media data information is received by the display operation means, the all media data information is created. Playback device. 2. The apparatus according to claim 1, further comprising: a deletion unit that deletes the folder and the all media data information in the folder when the external media detection unit detects that the external media is disconnected. The media playback device according to any one of -6.

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