JP5041470B2 - Content data reproduction apparatus and content list creation method - Google Patents

Description

  The present invention relates to a content data playback device, a content list creation method, and a content list search method, and more particularly to a content data playback device, a content list creation method, and a content list search method when a storage medium is connected.

  The in-vehicle audio device is connected to an external storage medium (USB memory, SD card, etc.) in addition to a function of reproducing data stored on a CD or DVD, and music data or video data stored on the external storage medium It has a function to play back. Such an external storage medium is constantly increasing in storage capacity, and the number of music data stored therein may be several thousand. For this reason, in order to search for music data in the external storage medium, it is necessary to list music data.

For example, Patent Document 1 discloses a technology in which a content list relating to content data is automatically constructed so that content data stored in a certain playback device can be shared by other playback devices. According to this, the user can search for desired content data using the automatically constructed content list.
JP 2003-132063 A

  In general, an external storage medium that stores music data or the like provides only a file system to an in-vehicle audio device, and thus the in-vehicle audio device needs to directly operate files and folders in the external storage medium. For this reason, when searching for music data stored in an external storage medium in an in-vehicle audio device, it is necessary to check each file in the external storage medium in advance and create and maintain a music list. There is. A conventional music list creation procedure is as follows.

  First, the in-vehicle audio apparatus analyzes the file system of the connected external storage medium and collects folder and / or file information. Next, music information (attribute information) included in music data in all files is collected, and a music list is created. The music information includes information such as an artist name, album name, and title name that can be used as search information for searching for music data. By reading the music information included in each piece of music data, a music list is created. Based on this music list, the music data stored in the external storage medium is displayed on the display unit, and the user selects desired music data. Search for. Then, the music data selected by the user is read from the external storage medium and is reproduced on the in-vehicle audio apparatus.

  However, when the number of music data stored in the external storage medium increases, it takes a long time to create a music list. For this reason, there is a problem that the user cannot search for music data from when the external storage medium is connected until the recognition and music list are created.

  An object of the present invention is to provide a content data playback apparatus and a content list creation method capable of creating a music list relating to music data in an external storage medium in a short time when an external storage medium is connected, and immediately executing a music data search And a content list search method.

Content data reproduction apparatus The present invention is a content data reproduction apparatus having a content data reproduction function, and a storage medium connection unit that connects a plurality of content data and a storage medium that stores a plurality of attribute information associated with each content data. A shortcut detection unit that detects whether or not there is a shortcut that refers to the content data or a folder having the content data in the storage medium; an attribute information extraction unit that extracts the attribute information from the storage medium; Based on the attribute information extracted from the attribute information extraction unit, a content list creation unit for creating a content list for specifying content data to be played back, and a display unit for displaying the content list, the attribute list The information extracting unit stores the memory Extracts attribute information of the content data of the content data or folder the shortcuts in media referenced, the content list creating unit creates a temporary content list based on the attribute information of the extracted content data.

The shortcut detection unit further includes a shortcut number determination unit that determines the number of shortcuts, and the shortcut detection unit detects a predetermined number of shortcuts having a new creation date and time when it is determined that there are a predetermined number or more of the shortcuts. The attribute information extraction unit extracts attribute information of content data referred to by a shortcut with a new creation date and time or content data in a folder.

After the provisional content list is created, the attribute information extraction unit extracts attribute information other than the content data referred to by the shortcut or the content data in the folder, and the content list creation unit extracts attribute information of the extracted content data. A regular content list is created based on the temporary content list.

When the content data is music data, the attribute information includes any of an artist name, album name, title name, and genre name related to the music data.

The content data reproducing apparatus further includes an operation unit and a data search unit that searches content data stored in the storage medium based on the temporary content list in response to an operation from the operation unit.

Content list creation method The present invention is a content list creation method for a storage medium storing content data, and the content data or a plurality of attribute information respectively associated with each content data is stored in the content data or A first step of detecting whether or not there is a shortcut that refers to a folder having the content data; and if the shortcut is detected by the first step, A second step of extracting attribute information of the content data in the folder; and a third step of creating a temporary content list for specifying content data to be reproduced based on the extracted attribute information of the content data There.

In the first step, the number of shortcuts is determined. When it is determined that there are a predetermined number or more of the shortcuts, a predetermined number of shortcuts with new creation dates and times are detected. In the second step, the shortcuts with new creation dates and times are detected. The attribute information of the content data to be referred to or the content data in the folder is extracted.

After the provisional content list is created, a fourth step of extracting attribute information other than the content data referred to by the shortcut or the content data in the folder, and based on the extracted content data attribute information and the temporary content list And a fifth step of creating a content list.

A sixth step of displaying the temporary content list or the regular content list is further included.

  According to the present invention, since the shortcut stored in the storage medium is detected and the content list of the content data referred to by the shortcut is created and displayed, the time required for creating the content list is shortened as compared with the prior art. As a result, the user can search for content data in a short time after the storage medium is connected.

According to the present invention, the number of shortcuts stored in a storage medium is detected, and if the number of shortcuts is equal to or greater than a predetermined number, a content list of content data referenced by a shortcut with a new creation date is created and displayed. With this configuration, even if there are many shortcuts, the creation time of the music list can be avoided from increasing, and the user can immediately execute the music data search.

  In this embodiment, an in-vehicle audio apparatus is used as a preferred example of the content data reproducing apparatus. The in-vehicle audio apparatus has a function of connecting a storage medium and playing back music data stored therein. The storage medium is a device including a storage medium such as a semiconductor memory, a disk drive device such as a CD or a DVD, or a hard disk drive device, and may be any device that stores music data that can be played back by an in-vehicle audio device. The music data storage format may be compressed in a format such as MP3 or WMA. Further, the storage medium itself may not have a playback function, but may store and provide only music data, or may have a function of playing music data by itself. Good. Further, the storage medium itself may be provided with a list of music data, but in such a case, the music list is created in the format of the in-vehicle audio apparatus. In the following description, it is assumed that a USB memory having a USB terminal is used as a storage medium, and the USB memory is connected to the in-vehicle audio apparatus.

FIG. 1 is a block diagram illustrating a configuration of an in-vehicle audio device according to an embodiment of the present invention. The in-vehicle audio apparatus 1 of the present embodiment includes a communication unit 3 for connecting a USB memory 31, a control unit 5 that controls each unit, an amplifier 13 that amplifies an audio signal read from the USB memory 31 by the control unit 5, and amplification A speaker 15 that converts the audio signal into audible sound, a display unit 17 that displays a music list related to music data in the USB memory 31, an operation unit 19 that includes a touch panel, a remote controller, and the like, and an operation from a user, a USB memory The content list storage unit 21 temporarily stores a music list related to 31 music data.

  In addition, the control unit 5 includes a shortcut detection unit 7 that detects a shortcut stored in the USB memory 31, and music information (artist name, album name, and information stored in association with music data stored in the USB memory 31). A content information extraction unit 9 that extracts a title name and the like, and a content list creation unit 11 that creates a music list based on the extracted music information. As a result, when the USB memory 31 is connected, the connection of the USB memory 31 is recognized, and a music list relating to the music data stored in the USB memory 31 is automatically created accordingly. It is displayed on the display unit 17 and used for the user's music data search.

Configuration of USB Memory A USB memory 31 as content data storage means is connected to an in-vehicle audio device and includes a control unit 33, a communication unit 35, and a storage unit 37. The storage unit 37 stores a plurality of music files corresponding to the content. This music file includes music data and music information associated with the music data. The control unit 33 controls the entire operation of the USB memory 31 and includes a CPU, a ROM, a RAM, and the like. The USB memory 31 transmits and receives data via the in-vehicle audio device 1 and the communication unit 35.

FIG. 2 is a flowchart showing a music list creation process of the in-vehicle audio apparatus.
First, when the USB memory 31 storing the music data is connected, the control unit 5 recognizes the connection of the USB memory 31 (step S1) and creates a temporary music list regarding the music data stored in the USB memory 31. (Step S3). Detailed creation of the temporary music list will be described later. The control unit 5 stores the created provisional music list in the content list storage unit 21, and displays the provisional music list on the display unit 17 (step S5). The user searches for music data stored in the USB memory 31 while referring to the temporary music list displayed on the display unit 17 (step S7). When the user selects desired music data from the operation unit 19 (step S9), the control unit 5 reads the corresponding music data from the USB memory 31 based on the temporary music list (step S11), and reproduces the read music data. (Step S13). While the music data is being reproduced, the control unit 5 creates a regular music list of the music data stored in the USB memory 31 by the background operation (step S15). The timing for creating the regular music list may be after the provisional music list is created, and is not necessarily performed during the reproduction of the music data.

  In order to create a regular music list, the control unit 5 analyzes the file system of the USB memory 31 and collects folder / file information. Next, the content information extraction unit 9 creates the temporary music list in step S15. In this case, the content information extraction unit 9 extracts music information included in the music data other than the temporary music list, and the content list creation unit 11 creates a music list based on the extracted music information, and uses the music list as the temporary music list. Create a regular music list by adding to the list. On the other hand, when the temporary music list is not created in step S15, the content information extraction unit 9 extracts the music information of all the music data stored in the USB memory 31, and the content list creation unit 11 extracts the music information. A regular music list is created based on the music information. Then, the control unit 5 updates the provisional music list to the regular music list and stores it in the content list storage unit 21.

  Next, creation of a temporary music list will be described with reference to FIGS. FIG. 3 is a diagram showing a file system of music data stored in the USB memory, FIG. 4 is a diagram showing music information relating to music data stored in the USB memory, and FIG. 5 is a temporary music list. It is an operation | movement flowchart when creating.

  In general, in order to store a large amount of data and efficiently manage the data, the data is stored in a file structure having a hierarchical structure or a tree structure. For example, as shown in FIG. 3, a folder (A, C,..., Y) is created, a folder (B, D,..., Z) is created in the lower layer, and music data is created in the lowermost layer. A certain file (ABC.mp3, DEF.mp3, ..., UVW.mp3, XYZ.mp3) is stored. The folder Short_B is a shortcut folder with the folder B as a reference destination, and the file Short_JKL.mp3 is a shortcut file with the file JKL.mp3 that is music data as a reference destination. Each piece of music data is associated with music information such as artist name, album name, title name, and genre name (FIG. 4).

  When music data is stored by such a file system, the temporary music list is created as follows. The control unit 5 analyzes the file system of the connected USB memory 31 (step S21), and collects folder and file information constituting the hierarchical structure (step S23). At this time, information such as a path from the root of the USB memory 31 to a folder and a file in each layer, a folder name, and a file name are collected. For example, when the USB memory 31 has a file system as shown in FIG. 3, the folder name (A, C,..., Y) of the highest hierarchy traced from the root, and the folder name (B, D of the next hierarchy) , ..., Z), next layer file name (ABC.mp3, DEF.mp3, ..., UVW.mp3, XYZ.mp3), shortcut folder name Short_B, shortcut file name Short_JKL.mp3 are extracted The

  Next, the shortcut detection unit 7 of the control unit 5 determines whether there is a folder having music data or a shortcut folder / shortcut file referring to music data based on the collected folder and file information (step S25). If there is no shortcut folder / shortcut file in step S25, a regular music list is created in step S15 (FIG. 2). On the other hand, if there is a shortcut folder / shortcut file in step S25, the content information extraction unit 9 extracts the music data in the folder referred to by the shortcut folder or the music information of the music data referred to by the shortcut file (step S27). Then, the content list creation unit 11 creates a temporary music list based on the music information extracted in step S27 and the file path collected in step S23 (step S29). The temporary music list reflects the file system of the USB memory 31 and has items of music number, artist name, album name, title name, genre name, and file path. The created temporary music list is displayed on the display unit 17 and is used as search information for music data to be reproduced. Therefore, for example, in the file system shown in FIG. 3, a temporary music list as shown in FIG. 6 is displayed. Here, in FIG. 6, the file path of the temporary music list is displayed, but the file path may not be displayed. Further, when the number of items is large, a scroll button may be displayed. Thereafter, when the user selects desired music data by selecting, for example, a music number from the operation unit 19, the control unit 5 reads the corresponding music data from the USB memory 31 according to the file path of the title and reproduces it. While the music data is being reproduced, the control unit 5 extracts the music information of all the music data stored in the USB memory 31 by the background operation and creates a regular music list (FIG. 7). ) After the music data reproduction ends, the user searches for desired music data based on the regular music list.

  According to the present embodiment, when the USB memory 31 is connected, the USB memory file system is analyzed in response to this, and a temporary music list relating to the music data referenced by the shortcut folder / shortcut file included therein is constructed. By doing so, a temporary music list required for music data search can be created in a short time. In addition, since the final music list (regular music list) is created and displayed after the temporary music list is created and displayed, the user can also play back music data that is less frequently used.

  In this embodiment, a temporary music list related to music data referred to by all shortcut folders / shortcut files stored in the USB memory 31 is constructed. However, when there are a large number of shortcut folders / shortcut files, the shortcut detector 7 determines the number of shortcut folders / shortcut files stored in the USB memory 31, and there are a predetermined number or more of shortcut folders / shortcut files. If it is determined, a predetermined number of shortcut folders / shortcut files having a new creation date and time are detected. Then, the content information extraction unit 9 extracts the music information of the music data in the folder referenced by the shortcut folder with the new creation date and time or the music data referred to by the shortcut file, and the content list creation unit 11 extracts the extracted music A temporary music list can be created and displayed based on the music information of the data. Thereby, even if there are a lot of shortcut folders / shortcut files, the creation time of the music list is prevented from being prolonged, and the user can immediately execute the music data search.

  In the above embodiment, one communication unit is connected to and communicates with a storage medium. However, a configuration in which a plurality of communication units are provided and a plurality of storage media can be connected at the same time may be employed.

  In the above embodiment, the USB memory is used as the storage medium for storing the music data, but other media (for example, an SD card or a memory stick) may be used. In the above embodiment, a storage medium (USB memory) that does not have a data playback function is used. However, a portable data playback device that stores music data and has a playback function may be used. . The connection method to the in-vehicle audio device may be either wired or wireless. Furthermore, in the above embodiment, music data is targeted, but video data or other multimedia data may be used. In that case, the playback device for playing back data has a video data playback function in addition to the music data playback.

  In addition, the configuration and control procedure of the in-vehicle audio device can be variously modified and changed within the scope of the gist of the present invention described in the claims.

It is a block diagram which shows the structure of the audio reproduction apparatus based on the Example of this invention. It is a flowchart which shows the music list creation process of a vehicle-mounted audio apparatus. It is a figure which shows the file system of the music data memorize | stored in USB memory. It is a figure which shows the music information regarding the music data memorize | stored in USB memory. It is a flowchart when creating a temporary music list. It is a figure which shows the example of a display of the content of a temporary music list. It is a figure which shows the example of a display of the content of a regular music list.

Explanation of symbols

1: vehicle-mounted audio device 5: control unit 7: shortcut detection unit 9: content information extraction unit 11: content list creation unit 21: content list storage unit 31: USB memory

Claims (9)

In a content data playback apparatus having a content data playback function,
A storage medium connecting unit for connecting a plurality of content data and a storage medium storing a plurality of attribute information respectively associated with each content data;
A shortcut detection unit that detects whether or not there is a shortcut that refers to the content data or a folder having the content data in the storage medium;
An attribute information extraction unit that extracts the attribute information from the storage medium;
A content list creation unit for creating a content list for specifying content data to be reproduced based on the attribute information extracted from the attribute information extraction unit;
A display unit for displaying the content list,
The attribute information extraction unit extracts attribute information of content data referred to by the shortcut in the storage medium or content data in a folder;
The content list creation unit creates a temporary content list based on the attribute information of the extracted content data.
A content data reproducing apparatus characterized by the above. The shortcut detection unit further includes a shortcut number determination unit that determines the number of shortcuts,
If it is determined that there are a predetermined number or more of the shortcuts, the shortcut detection unit detects a predetermined number of shortcuts with new creation dates and times,
The attribute information extraction unit extracts the attribute information of the content data referred to by the shortcut with the new creation date or the content data in the folder;
The content data reproducing apparatus according to claim 1, wherein: After creating the temporary content list, the attribute information extraction unit extracts attribute information other than the content data referred to by the shortcut or the content data in the folder,
The content list creation unit creates a regular content list based on the extracted content data attribute information and the temporary content list;
The content data reproducing apparatus according to any one of claims 1 and 2. When the content data is music data, the attribute information includes any of an artist name, album name, title name, and genre name related to the music data.
The content data reproducing apparatus according to any one of claims 1 to 3, wherein The content data reproducing apparatus further includes an operation unit,
A data search unit for searching content data stored in the storage medium based on the temporary content list in response to an operation from the operation unit;
The content data reproducing device according to claim 1, wherein the content data reproducing device is the same as the content data reproducing device according to claim 1. In a content list creation method for a storage medium storing content data,
A first step of detecting whether there is a shortcut referring to the content data or a folder having the content data from a storage medium storing a plurality of content data and a plurality of attribute information respectively associated with the content data;
A second step of extracting attribute information of content data referred to by the shortcut in the storage medium or content data in a folder when the shortcut is detected by the first step;
A third step of creating a temporary content list for specifying content data to be reproduced based on the attribute information of the extracted content data;
A content list creation method characterized by comprising: In the first step, the number of shortcuts is determined, and when it is determined that there are a predetermined number or more of the shortcuts, a predetermined number of shortcuts with new creation dates and times are detected,
In the second step, the attribute information of the content data referred to by the shortcut with the new creation date or the content data in the folder is extracted.
The content list creation method according to claim 6. A fourth step of extracting attribute information other than the content data referred to by the shortcut or the content data in the folder after the provisional content list is created;
A fifth step of creating a regular content list based on the attribute information of the extracted content data and the temporary content list;
The content list creation method according to claim 6, further comprising: A sixth step of displaying the temporary content list or the regular content list;
The content list creation method according to claim 6, wherein the content list is created.

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