JP5025333B2 - Data processing apparatus, control program, and computer-readable recording medium - Google Patents

Description

  The present invention relates to a data processing apparatus, a control program, and a computer-readable recording medium that can realize an operation that meets user expectations.

  The in-vehicle audio apparatus has a function of reproducing audio data and video data stored in a medium connected to a portable medium in addition to a function of reproducing data stored in a CD or DVD. Such portable media continue to increase in storage capacity and can store thousands of audio data. For this reason, in order to search audio data in a portable medium, it is necessary to create a database of audio data.

  Concerning a database of data stored in a portable device, a database for content data distributed to a plurality of playback devices is automatically constructed so that other playback devices can share content data stored in a playback device. An information processing apparatus is known (for example, see Patent Document 1).

  Conventionally, there has been known a data reproduction apparatus that starts reproduction from audio data in a folder in which audio data reproduced last is stored by a simple operation (see, for example, Patent Document 2).

  In general, portable media for storing audio data and the like are provided only in the file system, and thus the in-vehicle audio apparatus needs to directly operate files and folders in the portable media. Therefore, when searching for audio data stored in portable media in an in-vehicle audio device, it is necessary to check the files in the portable media one by one in advance and to build and maintain a database of portable devices There is. A conventional database construction procedure is as follows.

  First, the in-vehicle audio apparatus analyzes a file system of the connected portable media and collects folder and / or file information. Next, tag information included in the audio data in all files is collected and registered in the database. The tag information includes information such as artist name, album name, and song name that can be used as search information for searching audio data. By reading the tag information included in each piece of audio data, a database is created, and the audio data stored in the portable medium is displayed on the display based on the database, and the user searches for desired audio data. Then, the audio data selected by the user is read from the portable medium and reproduced on the in-vehicle audio apparatus.

  In addition, when the power (ACC) of the in-vehicle audio device is turned on from off, even if the connected portable media is the same as that before the power is turned off, the stored audio data is changed after the power is turned off. The database needs to be rebuilt.

Furthermore, the in-vehicle audio apparatus provides access information (path information including a folder, a file name, etc.) for accessing again the audio data being reproduced when the power is turned off (hereinafter referred to as “last audio data”). Stored as PPM (Play Position Memory) information. Thereafter, when the power is turned on, the in-vehicle audio apparatus accesses the last audio data according to the PPM information and starts reproduction.
JP 2003-132063 A JP 2002-269915 A

  The in-vehicle audio device registers the files in the database in the order in which they are found by searching the portable media via the file system when the database is reconstructed.

  In addition, the in-vehicle audio apparatus executes the reproduction of the last audio data according to the PPM information in parallel with the reconstruction of the database.

  However, as soon as the database is reconstructed, if the user switches from playing the last audio data to playing the audio data in the same folder as the last audio data, the user is registered in the database at that time. Since the audio data to be switched is selected from the existing audio data, that is, the database is not reconstructed, the audio data may be switched to audio data that has nothing to do with the last audio data. This occurs when audio data having a predetermined relationship with the last audio data (that is, in the same folder) is not registered in the database at the time when the user switches the audio data to be played back. To do.

  The present invention has been made in view of the above problems, and its purpose is to meet the expectation of a user who wants to start playback of a file in the same hierarchy as the file corresponding to the access information immediately after the reconstruction of the database. It is an object of the present invention to provide a data processing device, a control program, and a computer-readable recording medium that can realize the operation according to the operation.

  In order to achieve the above object, the data processing apparatus of the present invention creates a database according to a hierarchical structure of files and folders stored in an external medium including identification information, and creates the identification information and the creation means. And storing means for storing access information for accessing a file being reproduced when the power is turned off, and storing the identification information included in the external medium and the storing means when the power is turned on The determination means for determining whether the identification information is the same, and the identification information included in the external medium and the identification information stored in the storage means are determined to be the same, Information on files and folders in the same hierarchy as the file corresponding to the access information is first registered in the database, Characterized in that it comprises a reconstruction means for reconstructing the database.

  According to such a configuration, it is possible to realize an operation that meets the user's expectation to start playing a file in the same hierarchy as the file corresponding to the access information immediately after the database is reconstructed.

  Preferably, the reconstructing unit registers content information in the same layer as the content corresponding to the access information in the database, and then includes the content included in each layer in order from the highest layer of the external media. This information is registered in the database.

  According to such a configuration, immediately after the database is reconstructed, playback of the file in the same hierarchy as the file corresponding to the access information is started, and subsequently, playback of the file included in the highest hierarchy of the external medium is attempted. It is possible to realize an operation that meets the user's expectation.

  Preferably, the reconstructing means is included in a layer adjacent to a layer including the content corresponding to the access information after registering content information in the same layer as the content corresponding to the access information in the database. Content information is registered in the database.

  According to such a configuration, immediately after the database is reconstructed, playback of the file in the same hierarchy as the file corresponding to the access information is started, and subsequently included in the hierarchy adjacent to the hierarchy including the file corresponding to the access information. It is possible to realize an operation in accordance with the expectation of the user who intends to execute file reproduction.

  More preferably, the file information is a file path or tag information included in the file path and the file, and the folder information is a folder name.

  According to such a configuration, a database including a file path of data, tag information included in the file, and a folder name can be reconstructed.

  More preferably, the file is any one of a music file, a still image file, and a moving image file.

  According to such a configuration, immediately after the database is reconstructed, a music file, a still image file, or a moving image file in the same hierarchy as any one of the music file, the still image file, or the moving image file corresponding to the access information It is possible to realize an operation in accordance with the expectation of the user who intends to start reproduction of any one of the above.

  The control program of the present invention includes a creation unit that creates a database according to a hierarchical structure of files and folders stored in an external medium including identification information, the identification information, a database created by the creation unit, and a power source. Storage means for storing access information for accessing a file being played when turning off, identification information included in the external medium and identification information stored in the storage means when the power is turned on And a file corresponding to the access information when the identification information included in the external medium and the identification information stored in the storage unit are determined to be the same. Information on files contained in the same folder and on the same level as the file corresponding to the access information First registered information of folders in the database, characterized in that to function as reconstruction means for reconstructing the database.

  According to such a configuration, it is possible to realize an operation that meets the user's expectation to start playing a file in the same hierarchy as the file corresponding to the access information immediately after the database is reconstructed.

  The computer-readable recording medium of the present invention is created by a creation means for creating a database according to a hierarchical structure of files and folders stored in an external medium including identification information, the identification information, and the creation means. Storage means for storing access information for accessing a database and a file being played when the power is turned off, identification information included in the external medium and an identification stored in the storage means when the power is turned on Determining means for determining whether or not the information is the same, and when it is determined that the identification information included in the external medium and the identification information stored in the storage means are the same, the access information Information on files contained in the same folder as the corresponding file and files corresponding to the access information First registers information folder in the same hierarchy in the database and, characterized by recording a program for functioning as a reconstruction means for reconstructing the database.

  According to such a configuration, it is possible to realize an operation that meets the user's expectation to start playing a file in the same hierarchy as the file corresponding to the access information immediately after the database is reconstructed.

  According to the present invention, it is possible to realize an operation that meets the user's expectation to start playing a file in the same hierarchy as the file corresponding to the access information immediately after the database is reconstructed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, an in-vehicle audio playback device is used as a preferred example of the data processing device. The in-vehicle audio playback apparatus has a function of connecting a portable medium and playing back music data stored therein. The portable medium is a device including a semiconductor memory, a disk drive device such as a CD and a DVD, a hard disk drive device, and other storage media, and may be any device that stores music data that can be played back by an in-vehicle audio playback device.

  The music data storage format may be compressed in a format such as MP3 or WMA. In addition, the portable media 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 portable media itself may be provided with a music file database. In such a case, the database is created in the format of the in-vehicle audio playback device. In the following description, it is assumed that a USB memory having a USB terminal is used as a portable medium, and the USB memory is connected to an in-vehicle audio playback device.

  FIG. 1 is a block diagram showing the configuration of an in-vehicle audio playback apparatus according to an embodiment of the present invention. The in-vehicle audio playback apparatus 10 according to the present embodiment includes a USB connector 12 for connecting a plurality of USB memories A to C30 (hereinafter, USB memories A to C are collectively referred to as USB memory 30), Connected USB interface (I / F) 14, digital / audio converter (DAC) 16 that converts a digital audio signal read from USB memory 30 into an analog audio signal, amplifier 18 that amplifies the analog audio signal, amplified A speaker 20 that converts an audio signal into audible sound, an input unit 22 that includes a touch panel, a remote controller (not shown), etc., that receives input from the user, a display unit 24 that displays a database related to music files in the USB memory 30, and the USB memory 30 Read from Memory 26 for storing data and database-temporary (storage means), and a microcontroller 28 for controlling each (creating means, determining means, reconstruction means) contains. The memory 26 is composed of, for example, a hard disk or a non-volatile memory. The microcontroller 28 includes a CPU, RAM, ROM and the like. The input unit 22 includes various operation buttons and the like.

  The microcontroller 28 recognizes the connection of the USB memory 30 when the USB memory 30 is connected in accordance with a program stored in the internal RAM / ROM, and stores a database relating to the music file stored in the USB memory 30 accordingly. It has a function to create automatically. The contents of the created database are displayed on the display unit 24 and are immediately used for user data retrieval.

  2A is a diagram showing an example of the data structure of the USB memory 30, FIG. 2B is a diagram showing an example of the data structure of the music file, and FIG. 2C is a data structure of the memory 26. It is a figure which shows an example.

  As shown in FIG. 2A, the USB memory 30 stores unique identification information (ID) and a music file. The identification information included in the USB memory 30 is read by the microcontroller 28 when the USB memory 30 is connected to the in-vehicle audio playback device 10 and when the power of the in-vehicle audio playback device 10 is turned on / off.

  As shown in FIG. 2B, the music file is composed of music information (that is, tag information) and music data. The music information includes an artist name, an album name, and a title name as information on music data, but may further include a genre name, performance time, and the like. The music information functions as tag information when searching for a desired music file in the database.

  As shown in FIG. 2C, the memory 26 includes identification information (ID) read from the USB memory 30, a database relating to music files stored in the USB memory 30, PPM (Play Position Memory) information, a control program, and the like. Is stored. The database will be described later. Created by the microcontroller 28 when the USB memory 30 is connected. The PPM information is access information (path information including a folder name, a file name, and the like) for accessing again a music file being reproduced when the power is turned off (hereinafter referred to as the last music file).

  Next, a music file playback method in the in-vehicle audio playback device 10 will be described. FIG. 3 is a flowchart showing a method of reproducing a music file.

  First, when the in-vehicle audio playback device 10 is turned on and the USB memory 30 storing the music file is connected, the microcontroller 28 recognizes the connection of the USB memory 30 (step S101) and the USB. A database relating to the music file stored in the memory 30 is created (step S102). Detailed creation of the database will be described later. The microcontroller 28 stores the created database in the memory 26 and displays the contents of this database on the display unit 24 (step S103). The display mode is not particularly limited, but necessary items included in the database are displayed hierarchically, for example, in the order of 50 notes. A plurality of items may be displayed simultaneously using a scroll function.

  When a keyword or hierarchical search instruction is input via the input unit 22, the microcontroller 28 executes a database search (step S104), and the display unit 24 displays the search result (step S105). .

  Next, when a music file included in the search result is selected via the input unit 22 (step S106), the microcontroller 28 reads out the corresponding music file from the USB memory 30 based on the database (step S107), the DAC 16, The read music file is reproduced using the amplifier 18 and the speaker 20 (step S108).

  Next, the microcontroller 28 determines whether or not an instruction to turn off the power of the in-vehicle audio playback device 10 is input via the input unit 22 (step S109). If NO in step S109, the process returns to step S104.

  In the case of YES in step S109, the microcontroller 28 stores the PPM information in the memory 26 (step S110), and ends this process.

  When a plurality of USB memories 30 are connected to the in-vehicle audio playback device 10, the analysis is sequentially performed on all the USB memories 30 to create a database.

  Next, database creation will be described with reference to FIGS. 4 is a diagram showing a file system of music files stored in the USB memory, FIG. 5 is a diagram showing an example of tag information included in the music files, and FIG. 6 is a database creation process. It is a flowchart.

  In general, in order to store many files and manage their files efficiently, the files are stored in a hierarchical structure or a tree structure. The file system is realized by a microcontroller 28 according to a control program stored in the memory 26.

  For example, as shown in FIG. 4, the file system has “Folder A” (folder) and “a001.mp3 to a100.mp3” (music file) in the first layer immediately below the root, and “Folder A”. “Folder B” (folder) and music files (“b001.mp3 to b050.mp3”) are stored in the second layer, which is the lower layer of “Folder B”, and “Folder C” ( Folder) and music files ("c001.mp3 to c003.mp3"), and music files ("d001.mp3 to d003.mp3") in the fourth layer, which is a lower layer of "Folder C". An example of tag information included in these music files is shown in FIG.

  When the music data is stored in the USB memory 30 according to such a file system, the database is created as follows according to FIG. The microcontroller 28 analyzes the file system of the connected USB memory 30 (step S201), and collects information on folders and music files constituting the hierarchical structure (step S202). At this time, information such as the path and folder name from the root of the USB memory 30 to the folder or music file of each layer is collected, and tag information of the music file is further collected. The microcontroller 28 can also extract the folder name and file name from the music file path.

  For example, when the USB memory 30 is in the state of the file system as shown in FIG. 4, the microcontroller 28 follows the root from the highest layer “Folder A” (folder) and “a001.mp3 to a100”. Extract the name of “.mp3” (music file). Next, the microcontroller 28 extracts the names of “Folder B” (folder) and “b001.mp3 to b050.mp3” (music file) in the second layer. Thus, the microcontroller 28 extracts the folder name and the music file path for each layer of the file system from the highest layer (first layer) to the lowest layer (fourth layer). Further, the microcontroller 28 extracts tag information such as an artist name, an album name, and a title name from each music file.

  Next, the microcontroller 28 registers the collected folder name, music file name, and music file tag information in the database in the memory 26 (step S203). The database reflects the file system of the USB memory. For example, the file system shown in FIG. 4 has the contents shown in FIG. The database has items of identification (ID) information, file path, first to fourth layers, and tag information. Information in each item includes a hierarchical structure of the USB memory 30 and folders included in the hierarchical structure. Name and file name and each music file. Folder names are assigned to the first to third hierarchies.

  The microcontroller 28 continues to collect the folder name, file name, and tag information until all files in the USB memory 30 are registered, completes the database (steps S204 and S205), and ends this process.

  FIG. 8 is a flowchart showing a database restructuring process. Here, it is assumed that the power source of the in-vehicle audio playback device 10 is off.

  First, the microcontroller 28 determines whether or not an instruction to turn on the power of the in-vehicle audio playback device 10 is input via the input unit 22 (step S301).

  If NO in step S301, this process ends. On the other hand, if YES in step S301, the microcontroller 28 reads the identification information from the USB memory 30 (step S302), and the identification information read in step S302 and the identification corresponding to the database stored in the memory 26. It is determined whether or not the information is the same (step S303). Here, the microcontroller 28 determines whether the USB memory connected when the in-vehicle audio playback device 10 is turned off and the USB memory connected when the in-vehicle audio playback device 10 is turned on are the same. Deciding.

  If NO in step S303, that is, if the read identification information is different from the identification information corresponding to the database stored in the memory 26, the microcontroller 28 executes the database creation process of FIG.

  On the other hand, if YES in step S303, that is, if the read identification information and the identification information corresponding to the database stored in the memory 26 are the same, the microcontroller 28 stores the PPM information stored in the memory 26. Accordingly, the reproduction of the last music file is executed, and at the same time, the database is reconstructed (step S304), and the process proceeds to step S104 in FIG. Here, it is assumed that the PPM information is “C: / Folder A / Folder B / c002.mp3” corresponding to the database ID 155 of FIG.

  As described above, the database is created by the microcontroller 28 from the highest layer (first layer) to the lowest layer (fourth layer), folder name and music file name for each layer of the file system. And by extracting tag information.

  However, immediately after starting the reconstruction of the database in step S304, the same as the last music file ("C: / Folder A / Folder B / c002.mp3") is obtained from the reproduction of the last music file via the input unit 22. If a switching instruction to play a music file in the folder is input, the database for the switching destination music file has not been rebuilt, so the music file is switched to a music file that is not related to the switching destination music file. Or until the database rebuilding is complete.

  Therefore, in the reconstruction of the database in step S304, the microcontroller 28 determines the path of the music file included in the same hierarchy as the music data corresponding to the PPM information ("C: / Folder A / Folder B / c002.mp3"). First, the tag information of the music file and the folder name are registered in the database (step S304a). Thereafter, the microcontroller 28 registers the folder name, the music data path, and the music data tag information in the database in accordance with the order in which the file system detects the folder name or the music file path, that is, the highest hierarchy ( From the first layer) to the lowest layer (fourth layer), the folder name, the music data path, and the music data tag information are registered in the database for each file system layer (step S304b). FIG. 9 shows an example of a database in which folder names, music data path, and music data tag information are registered according to steps S304a and S304b. The microcontroller 28 can search the database using the file name, file path, and music file tag information (artist name, album name, title name) as search keys.

  In step S304b, the folder name, music file path, and music data tag information are registered in the database according to the order in which the file system detects the folder name, music file path, and music data tag information. The path of the music file included in the upper layer or lower layer folder adjacent to the hierarchy including the corresponding music file, the tag information of the music file, and the folder name in the upper layer or lower layer are registered in the database. (Step S304c). FIG. 10 shows an example of a database in which folder names, music file paths, and music data tag information are registered according to steps S304a and S304c.

  As described above in detail, according to the present embodiment, the microcontroller 28 creates a database according to the hierarchical structure of music files and folders stored in the USB memory 30 (external media) including the identification information, The memory 26 stores the identification information, the created database, and access information (PPM information) for accessing the music file being reproduced when the power is turned off. Then, the microcontroller 28 determines whether or not the identification information included in the USB memory 30 and the identification information stored in the memory 26 are the same when the power is turned on. The path of the music file in the same hierarchy as the music file corresponding to the information, the tag information and the folder name of the music file are first registered in the database, and the database is reconstructed.

  Therefore, immediately after the database is reconstructed, it is possible to realize an operation that meets the user's expectation to start playing a music file in the same hierarchy as the music file corresponding to the access information.

  In addition, a music file in the same hierarchy as the music file corresponding to the access information is likely to be a music file of the same album or the same artist, so immediately after the database is rebuilt, the music file corresponding to the access information It is possible to realize an operation that meets the user's expectation to start playback of the music file of the same album or artist as the album or artist.

  Furthermore, the microcontroller 28 registers the path of the music file, the tag information of the music file and the folder name in the same hierarchy as the music file corresponding to the access information in the database, and then in order from the highest hierarchy of the USB memory 30. In addition, the path of the music file included in each layer, the tag information of the music file, and the folder name are registered in the database. Therefore, immediately after the database is reconstructed, playback of the music file in the same hierarchy as the music file corresponding to the access information is started, and then the music file included in the highest hierarchy of the external media is tried to be played back. It is possible to realize operations that meet user expectations.

  Further, the microcontroller 28 registers the path of the music file in the same hierarchy as the music file corresponding to the access information, the tag information and the folder name of the music file in the database, and then includes the music file corresponding to the access information. The music file path, the music file tag information, and the folder name included in the layer adjacent to are registered in the database. Therefore, immediately after the database is reconstructed, the music file in the same hierarchy as the music file corresponding to the access information is started to be played, and then the music included in the hierarchy adjacent to the hierarchy including the music file corresponding to the access information. It is possible to realize an operation in accordance with the expectation of the user who intends to execute file reproduction.

  In the present embodiment, the music file information registered in the database is path information, tag information, and folder names, but only path information and folder names may be used. In this case, the music search is performed based on the path information. Further, the file information registered in the database is not limited to the music file, and may be, for example, still image or moving image file information. In this case, the still image or moving image file has tag information (author, date, genre, etc.) in the still image or moving image data.

  A recording medium in which a software program for realizing the functions of the data processing apparatus is recorded is supplied to the data processing apparatus, and the computer of the data processing apparatus (ie, the microcontroller 28) is stored in the storage medium. By reading and executing the program, the same effects as in the above embodiment can be obtained. Examples of the storage medium for supplying the program include a CD-ROM, a DVD, or an SD card.

  In addition, the same effect as that of the above-described embodiment can be obtained when the computer of the data processing apparatus (that is, the microcontroller 28) executes a software program for realizing the function of the data processing apparatus.

  The present invention is not limited to the above-described embodiment, and can be implemented with various modifications within a range not departing from the gist thereof.

It is a block diagram which shows the structure of the vehicle-mounted audio reproduction apparatus as a content processing apparatus which concerns on embodiment of this invention. (A) is a figure which shows an example of the data structure of USB memory, (B) is a figure which shows an example of the data structure of a music file, (C) is a figure which shows an example of the data structure of a memory. It is a flowchart which shows the reproduction | regeneration method of music data. It is a figure which shows the file system of the music data memorize | stored in USB memory. It is a figure which shows an example of the tag information contained in a music file. It is a flowchart which shows the creation process of a database. It is a figure which shows an example of a database. It is a flowchart which shows the process of reconstruction of a database. It is a figure which shows an example of the database which registered the folder name and the music data name according to step S304a of FIG. 8, S304b. It is a figure which shows an example of the database which registered the folder name and the music data name according to step S304a of FIG. 8, S304c.

Explanation of symbols

10 In-vehicle audio playback device 12 USB connector 14 USB interface (I / F)
16 Digital / Audio Converter (DAC)
18 Amplifier 20 Speaker 22 Input Unit 24 Display Unit 26 Memory 28 Microcontroller

Claims (7)

Creating means for creating a database according to a hierarchical structure of files and folders stored in an external medium including identification information;
Storage means for storing the identification information, the database created by the creation means, and access information for accessing the file being reproduced when the power is turned off;
Determining means for determining whether or not the identification information included in the external medium and the identification information stored in the storage means are the same when the power is turned on;
When it is determined that the identification information included in the external medium and the identification information stored in the storage unit are the same, information on a file and folder information on the same hierarchy as the file corresponding to the access information A data processing apparatus comprising: re-establishing means for first registering the data in the database and reconstructing the database. The restructuring means, after registering information of files and folders in the same hierarchy as the file corresponding to the access information in the database, is included in each hierarchy in order from the highest hierarchy of the external media 2. The data processing apparatus according to claim 1, wherein file information and folder information are registered in the database. The restructuring means, after registering file information and folder information in the same hierarchy as the file corresponding to the access information in the database, is included in a hierarchy adjacent to the hierarchy including the file corresponding to the access information The data processing apparatus according to claim 1, wherein file information and folder information to be registered are registered in the database. 4. The data according to claim 1, wherein the file information is a file path or tag information included in the file path and the file, and the folder information is a folder name. Processing equipment. The data processing apparatus according to claim 1, wherein the file is any one of a music file, a still image file, and a moving image file. Computer
Creating means for creating a database according to the hierarchical structure of files and folders stored in external media including identification information;
Storage means for storing the identification information, the database created by the creation means, and access information for accessing the file being reproduced when the power is turned off;
A discriminating means for discriminating whether or not the identification information included in the external medium and the identification information stored in the storage means are the same when the power is turned on; and the identification information included in the external medium and the storage When it is determined that the identification information stored in the means is the same, the information on the file included in the same folder as the file corresponding to the access information and the file corresponding to the access information are in the same hierarchy A control program for registering folder information in the database first and causing the database to function as a reconstruction means for reconstructing the database. Computer
Creating means for creating a database according to the hierarchical structure of files and folders stored in external media including identification information;
Storage means for storing the identification information, the database created by the creation means, and access information for accessing the file being reproduced when the power is turned off;
A discriminating means for discriminating whether or not the identification information included in the external medium and the identification information stored in the storage means are the same when the power is turned on; and the identification information included in the external medium and the storage When it is determined that the identification information stored in the means is the same, the information on the file included in the same folder as the file corresponding to the access information and the file corresponding to the access information are in the same hierarchy A computer-readable recording medium having recorded therein a program for first registering folder information in the database and causing it to function as a reconstruction means for reconstructing the database.

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