JP4812109B2 - Content data playback device, content list creation method, and content list search method - Google Patents

Description

  The present invention relates to a content data playback device, a content list creation method, and a content data search method. The present invention relates to a content data playback device, a content list creation method, and a content data search method.

  The in-vehicle audio device is connected to an external medium (USB memory, SD card, etc.) in addition to the function of reproducing music data and video data stored in a medium such as a CD or DVD, and the music stored in the external medium. It has a function to play back data and video data. Such media may continue to increase in storage capacity, and the number of music data stored therein may be thousands. For this reason, in order to search for music data in the media, it is necessary to list the 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, a medium for storing 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 medium. For this reason, in order to search for music data stored in the media in the in-vehicle audio device, it is necessary to check the files in the media one by one in advance and create / hold a music list. A conventional music list creation procedure is as follows.

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

  However, when the number of music data stored in the media 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 until the recognition and the music list are created after the media is connected.

  In order to solve the above problems, the applicant of the present application analyzes an electronic file system of connected media, collects folder names and file names, and creates an electronic device that creates a temporary music list based on the collected folder names and file names. It has been proposed (Japanese Patent Application No. 2006-262193). As a result, the provisional music list of the music data stored in the media is created, so the creation time of the music list can be shortened, and the user can search for the music data in a short time after the media is connected. It can be performed.

  However, in the above prior art, since the temporary music list is created based on the folder name and the file name, the music data search by the genre name or the like cannot be performed in the music data search by the temporary music list. In addition, since the temporary music list was created even for media that can be created based on music information in a short time with a fast transfer speed, operability is reduced in music data search for media with a fast transfer speed. There was a problem.

  It is an object of the present invention to efficiently create a music list related to music data in a medium according to a transfer speed of a connected medium, and to immediately execute a music data search and content list creation A method and a content list search method are provided.

Content data playback apparatus The present invention is a content data playback apparatus that acquires and plays back content data from a medium that stores a plurality of content data and a plurality of attribute information associated with each content data. A content data name acquisition unit that acquires a data name of data; an attribute information acquisition unit that acquires the attribute information from the medium; a media database that stores media having a low transfer rate and high-speed media; and When the recognized media type is a low speed, the media type recognition unit for recognizing the media type acquires the data name from the media using the content data name acquisition unit, and based on the data name A content data name list is created and the recognized media When another is high-speed, the attribute information acquisition unit is used to acquire attribute information from the media, and to create an attribute information list based on the attribute information; and the content data name list or attribute And a display unit for displaying an information list.

The attribute information acquisition unit acquires the attribute information of the content data in the medium after creating the content data name list, and the content list generation unit is configured to acquire the attribute information list based on the acquired attribute information of the content data. Create

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 list creation unit displays the creation status of the attribute information list on the display unit when creating the attribute information list.

The content data reproduction apparatus further includes an operation unit, and a data search unit that searches content data stored in the medium based on the content data name list or the attribute information list in response to an operation from the operation unit. I have.

Content list creation method The present invention is a media content list creation method for storing a plurality of content data and a plurality of attribute information associated with each content data. A first step of recognizing the type of the medium; if the recognized type of the medium is low speed, obtain a data name from the medium, and a content data name based on the data name A second step of creating a list, and a third step of obtaining attribute information from the medium and creating an attribute information list based on the attribute information when the recognized media type is high speed. ing.

After the creation of the content data name list, a fourth step of acquiring attribute information of the content data in the medium, a fifth step of creating an attribute information list based on the attribute information, and the content data name list or the attribute A sixth step of displaying an information list and a seventh step of displaying a creation status of the attribute information list when the attribute information list is created are further included.

Content Data Search Method The present invention is a content data search method, in which content data stored in an external medium is searched using the content list created by the content list creation method.

According to the present invention, when the transfer speed of the connected medium is low, the content data name list is created based on the data name of the content data in the medium, and the transfer speed of the connected medium is high The attribute information list is created based on the attribute information related to the content data in the medium. As a result, when the transfer speed of the connected media is low, the content list creation time is shortened compared to the conventional method, content data can be searched in a short time, and the transfer speed of the connected media is high. In some cases, the operability of the content data search can be prevented from being deteriorated.

According to the present invention, since the creation status of the attribute information list is displayed when creating the attribute information list, the user can easily recognize the creation status of the attribute information list.

  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 external media and playing back music data stored therein. The external medium is a device including a storage medium such as a USB 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 the in-vehicle audio device. The music data storage format may be compressed in a format such as MP3 or WMA. In addition, the external media 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. Furthermore, the external medium may itself 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.

FIG. 1 is a block diagram illustrating a configuration of an in-vehicle audio device according to an embodiment of the present invention.
An external medium 31 serving as content data storage means is connected to the in-vehicle audio device, and includes a control unit 33, a communication unit 35 that transmits and receives data, and a content file storage unit 37. The content file storage unit 37 stores a plurality of music files corresponding to the content. This music file includes music data and music information (artist name, album name, title name, genre name, etc.) associated with the music data, and has an extension (mp3, wma) indicating that it is music data. The data name it has is given. The control unit 33 controls the entire operation of the external medium 31 and is composed of a CPU, a ROM, a RAM, and the like.
The in-vehicle audio apparatus 1 includes a communication unit 3 for connecting an external medium 31, a control unit 5 that controls each unit, and audio signal processing that the control unit 5 generates and amplifies music data read from the external medium 31 as an audio signal. Unit 13, a speaker 15 that converts the amplified audio signal into an audible sound, a display unit 17 that displays a music list related to music data of the external media 31, an operation unit that inputs an operation from a user, such as a touch panel or a remote controller 19. A media database 21 storing identification information of a medium having a high transfer speed and a medium having a low transfer speed, and a content list storage unit 23 for temporarily storing a music list related to music data of the external medium 31 are provided. In this embodiment, the media database 21 stores a USB memory and an SD card as media having a high transfer speed, and a CD and a DVD as media having a low transfer speed. However, the present invention is not limited to this. , It may be changed by the user.

Here, the configuration of the control unit 5 described above will be described in detail.
The control unit 5 includes a media type recognition unit 7 that recognizes the type of the external media 31 connected to the in-vehicle audio device 1, a content data name acquisition unit 8 that acquires a data name of music data stored in the external media 31, an external A content information acquisition unit 9 that acquires music information (artist name, album name, title name, genre name, etc.) stored in association with the music data stored in the media 31, and the acquired data name or music information. A content list creation unit 11 that creates a music list based on the content list is provided. As a result, when the external media 31 is connected, the connection of the external media 31 is recognized, and a music list relating to the music data stored in the external media 31 is automatically created accordingly. It is displayed on the display unit 17 and used for the user's music data search.

FIG. 2 is a flowchart showing a music list creation process of the in-vehicle audio device.
First, when the external media 31 is connected to the in-vehicle audio apparatus 1 (step S1), the media type recognition unit 7 recognizes the connection of the external media 31 and recognizes the type of the external media 31 (USB memory, DVD, etc.). (Step S3). The control unit 5 determines whether or not the type of the external medium 31 recognized in step S3 is stored in the media database 21 as a low-speed medium (step S5). In step S5, if the recognized type of the external medium 31 is stored in the media database 21 as a low-speed medium, that is, if the type of the external medium 31 is a disk drive device such as a CD or a DVD, the external medium 31 A music data name list relating to the stored music data is created (step S7). Detailed creation of the music data name list will be described later. And the control part 5 memorize | stores the produced music data name list in the content list memory | storage part 23, and displays this music data name list (FIG. 6) on the display part 17 (step S9). The user searches for desired music data stored in the external medium 31 while referring to the music data name list displayed on the display unit 17 (step S11). When the user selects desired music data using the operation unit 19 (step S13), the control unit 5 reads the corresponding music data from the external media 31 based on the music data name list (step S15), and the read music data Is reproduced (step S17). While the music data is being reproduced, the control unit 5 creates a music information list related to the music data stored in the external medium 31 by the background operation and stores it in the content list storage unit 23 (step S19). .
Here, creation of the music information list will be described. In creating the music information list, the control unit 5 analyzes the file system of the external media 31 and collects folder / file information (file path). Then, the control unit 5 determines whether or not the external media 31 is music data based on the collected folder / file information. This process is determined based on whether or not there is data (for example, data having an extension such as mp3 or WMA) having an identifier indicating that it is music data in the external medium 31. When the control unit 5 determines that the data is music data, the content information acquisition unit 9 acquires music information (artist name, album name, title name, etc.) related to the music data stored in the external medium 31. The content list creation unit 11 creates a music information list in which the acquired music information is associated with the file path and displays the music information list on the display unit 17. The above process is repeated until the music information of all music data of the external media 31 is acquired. Further, when the music data name list is created in step S7, the control unit 5 updates the music data name list to the music information list and stores it in the content list storage unit 23. Further, the control unit 5 displays information indicating the creation status of the music information list on the display unit 17 while the music information list is being created.
The timing of creating the music information list may be after the creation of the music data name list, and is not necessarily performed during reproduction of the music data. On the other hand, in step S5, if the recognized type of the external medium 31 is stored in the media database 21 as a high-speed medium, that is, if the type of the external medium 31 is a USB memory, a hard disk drive, or the like, the above-described music Perform information list creation processing.

  Here, the creation of the music data name list described above will be described in detail with reference to FIGS. 3 is a diagram showing a file system of music data stored in the external medium 31, FIG. 4 is a diagram showing music information relating to music data stored in the external media 31, and FIG. It is an operation | movement flowchart when creating a name list.

  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. 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, creation of a music data name list is performed as follows. The control unit 5 analyzes the file system of the connected external media 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 external medium 31 to a folder and a file in each layer, a folder name, and a file name are collected. For example, when the external medium 31 is a file system as shown in FIG. 3, the folder name (A, C,..., Y) of the highest hierarchy and the folder names (B, D) of the next hierarchy traced from the root. ,..., Z), and the file names (ABC.mp3, DEF.mp3,..., UVW.mp3, XYZ.mp3) of the next layer are acquired.

  Next, the control unit 5 determines whether there is music data in the external medium 31 based on the collected folder / file information. (Step S25). This process is determined by whether or not there is data having an identifier indicating that it is music data (for example, data having an extension such as mp3 or WMA). If the control unit 5 determines that there is music data, the content data name acquisition unit 8 selects the data name of the music data (ABC.mp3, DEF.mp3,..., UVW.mp3, XYZ.mp3). Obtain (step S27). Next, the content list creation unit 11 creates a music data name list by associating the music data names acquired in step S27 with the file paths collected in step S23, and stores them in the content list storage unit 23. (Step S29). The created music data name list is displayed on the display unit 17 and used as search information for music data to be reproduced. Thereafter, the control unit 5 determines whether the data name acquisition of all music data has been completed (step S31). If it is determined in step S31 that the acquisition of the data names of all music data has not been completed, the processes in steps S27 to S29 are repeated. On the other hand, if it is determined in step S31 that the acquisition of the data names of all the music data has been completed, the music data name list creation process ends. Therefore, for example, in the file system shown in FIG. 3, a music data name list as shown in FIG. 6 is displayed. Here, in FIG. 6, the file path of the music data name list is displayed, but the file path may not be displayed. Further, when the number of items is large, the scroll key 41 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 external medium 31 according to the file path of the title and reproduces it. While the music data is being reproduced, the control unit 5 obtains music information related to all the music data stored in the external medium 31 by the background operation, creates a music information list, and creates a content list. It memorize | stores in the memory | storage part 23 (FIG. 7). Therefore, after the music data reproduction ends, the user searches for desired music data based on the music information list. Thereby, the music data search by the artist name or album name can be performed. Further, the control unit 5 displays information indicating the creation status of the music information list such as reference numeral 42 on the display unit 17 together with the music information list.

  In this embodiment, when the external medium 31 is connected, the type of the external medium is recognized in response to this, and if the transfer speed is low, the music data name list that lists the data names of the music data When the medium is a medium with a high transfer speed, a music information list in which music information related to music data is listed is created. This makes it possible to shorten the music list creation time for media with a low transfer speed and search for music data in a short time, and for media with a high transfer speed to search for music data by artist name, etc. Thus, the operability of the music data search can be prevented from being deteriorated. In addition, in the case of a medium with a low transfer speed, since the music data name list is created and displayed, the final music list (music information list) is created and displayed. You can also search by album name.

  In the above embodiment, the type of external media connected to the in-vehicle audio device is recognized and the music list creation process is switched. However, in the in-vehicle audio device incorporating a disk drive device such as a CD or DVD or a hard disk device, It can also be applied when searching for data.

  In the above embodiment, one communication unit is connected to and communicates with an external medium. However, a plurality of communication units may be provided so that a plurality of external media can be connected simultaneously. Further, the connection method to the in-vehicle audio device may be either wired or wireless.

  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 the above embodiment, the information indicating the creation status of the music information list is displayed only by numerical values, but an indicator display 43 may be added (FIG. 8). At this time, the indicator is divided into predetermined sections, and each section is displayed with a color. For example, when the creation status is less than 20%, “red” is set, when the creation status is 20% to 80%, “yellow” is set, and when the creation status is 80% or more, “blue” is set.

  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 vehicle-mounted audio apparatus which concerns 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 an external medium. It is a figure which shows the music information regarding the music data memorize | stored in an external medium. It is a flowchart when creating a music data name list. It is a figure which shows the example of a display of a music data name list. It is a figure which shows the example of a display of a music information list. It is a figure which shows the modification of a music information list display.

Explanation of symbols

1: vehicle-mounted audio device 5: control unit 7: media type recognition unit 8: content data acquisition unit 9: content information acquisition unit 11: content list creation unit 21: media database 23: content list storage unit 31: external media

Claims (10)

In a content data reproducing apparatus that acquires and reproduces content data from a medium that stores a plurality of content data and a plurality of attribute information associated with each content data,
A content data name acquisition unit that acquires the data name of the content data from the medium;
An attribute information acquisition unit for acquiring the attribute information from the medium;
A media database that stores media with low transfer rates and high-speed media types;
A media type recognition unit for recognizing the type of the media;
When the recognized media type is low speed, the content data name acquisition unit is used to acquire a data name from the media, create a content data name list based on the data name, and the recognized data When the type of media is high speed, the attribute information acquisition unit is used to acquire attribute information from the media, and a content list creation unit that creates an attribute information list based on the attribute information;
A display unit for displaying the content data name list or the attribute information list;
A content data reproducing apparatus comprising: The attribute information acquisition unit acquires the attribute information of the content data in the media after creating the content data name list,
The content list creation unit creates the attribute information list based on the attribute information of the acquired content data;
The content data reproducing apparatus according to claim 1, wherein: 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 and 2. The content list creation unit displays the creation status of the attribute information list on the display unit when creating the attribute information list.
The content data reproducing apparatus according to claim 2, wherein: The content data reproducing apparatus further includes an operation unit,
A data search unit for searching content data stored in the medium based on the content data name list or the attribute information list in response to an operation from the operation unit;
The content data reproducing apparatus according to claim 1, further comprising: In a content list creation method for media that stores a plurality of content data and a plurality of attribute information associated with each content data,
It has a media database that stores low-speed media and high-speed media type information,
A first step of recognizing the type of media;
A second step of acquiring a data name of the content data from the medium and creating a content data name list based on the data name if the recognized medium type is low speed;
If the type of the recognized medium is a high speed, acquires the attribute information from the media, third step of creating an attribute information list based on the attribute information,
A content list creation method characterized by comprising: A fourth step of obtaining attribute information of content data in the medium after the content data name list is created;
A fifth step of creating an attribute information list based on the attribute information;
The content list creation method according to claim 6, further comprising: A sixth step of displaying the content data name list or the attribute information list;
The content list creation method according to any one of claims 6 and 7. A seventh step of displaying the creation status of the attribute information list when creating the attribute information list;
The content list creation method according to claim 7 . The content data stored in the medium is searched by using the content data name list or the attribute information list created by the content list creation method according to claim 6.
Content data search method characterized by the above.

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