JP2008251081A - Data information management system, and computer program and data information management method used for the system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to select desired data information easily and quickly without losing visual operation feelings while effectively utilizing hardware resources of a memory or the like. <P>SOLUTION: When a continuous data group determination means 5a determines that no data information of continuous data group numbers is recorded for each data group, a data information reading control means 5a reads data information having relevant data group numbers added thereto en bloc for every one data group from a recording medium by a data information reading means 2 to stored them in a data information recording means 5c. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data information management system capable of reading predetermined data information from a recording medium on which a plurality of data information is recorded and displaying it on a display means, a computer program used in the system, and a data information management method About.

  In an in-vehicle audio device, music data can be read from a recording medium such as a CD (Compact Disc) medium, and music can be output from a speaker installed in the vehicle. Many conventional in-vehicle audio devices target only music CDs (CD-DA (Compact Disc Digital Audio) recorded CDs) as recording media capable of reproducing music information. . This music CD can record music information of about 80 minutes as the maximum recording time.

  However, music data recorded in a recording format (music (speech) compression system) different from the conventional ones with the increase in portable audio devices and the spread of music data trading systems using the Internet, etc. There are many. For example, music data in a recording format called MP3 (MPEG Audio Layer-3) is widely known. MP3 format music data can be compressed to about one-tenth the size of data while maintaining almost the same sound quality as a music CD. For this reason, 10 times the number of music CDs can be recorded on a general CD medium. For example, 150 CDs or more of music data (MP3 format) can be recorded on one CD. It has become.

  Furthermore, information such as “song name, artist name” (hereinafter referred to as title information) can be recorded in MP3 format music data based on a standard called ID3 tag. For this reason, when the user listens to music data in the MP3 format, it is possible to select a song after confirming the song name or artist name in advance.

Many of today's in-vehicle audio devices can read music data recorded by a music compression method such as MP3 from a CD or the like and output it from a speaker (see, for example, Patent Document 1). Thus, by providing a playback function for music data recorded by a music compression method such as MP3 in the in-vehicle audio device, it becomes unnecessary to carry around a plurality of music CDs as in the prior art, and in the in-vehicle audio device However, there is an advantage that it is not necessary to install a CD changer or the like.
Japanese Patent No. 3719645

  By the way, when listening to music data of a music compression method such as MP3, as described above, music data of 150 songs or more can be recorded on one CD, so that the user can easily understand the contents of the music data. There is a problem that it is difficult to determine and it is difficult to find desired music data. For this reason, in-vehicle audio apparatuses having a playback function such as MP3 generally use a method in which title information such as a song title is displayed on a liquid crystal display unit and the user selects music data.

  However, when acquiring title information from CD media, it is necessary to read the information by rotating the disc with a spindle motor and operating the optical pickup, so that it takes time to read the title information. there were. For this reason, when the method of acquiring title information one song at a time according to the operation by the user, there is a problem that the display of the title information is delayed and the visual operation feeling of the operator is impaired. .

  On the other hand, it is also possible to adopt a method in which the title information of all the music pieces is read in advance and saved in a memory provided in the in-vehicle audio apparatus. However, with MP3 format music data, title information of 150 or more songs can be recorded on one CD, so a large capacity memory is required to save all title information at once, from a cost standpoint. There was a problem that it could not be easily adopted.

  The present invention has been made in view of the above-mentioned problems, and without damaging the user's visual operation feeling, while making effective use of hardware resources such as a memory, the user can easily and quickly achieve a desired one. It is an object of the present invention to provide a data information management system capable of selecting data information, a computer program used in the system, and a data information management method.

  In order to solve the above-described problem, a data information management system according to the present invention includes a plurality of pieces of data information recorded as identifiable by identification numbers, and the data information having consecutive identification numbers as one data group. Data information reading means that can be read in a batch, and data information that is collectively read as one data group by the data information reading means is identified in association with the identification number of the data information Data group number assigning means for assigning a data group number for recording and a recording capacity capable of recording data information of at least three data groups, and the data group number assigned by the data group number assigning means Data information recording means for recording information for each data group; data information display means for displaying the data information; and Data information extraction and display means for extracting predetermined data information from the data information recorded in the data information recording means and displaying it on the data information display means; and a data group number of the data information displayed on the data information display means And the continuous data group judging means for judging whether or not the data information of the data group number continuous to the data group number is recorded in the data information recording means, and the continuous data group judging means When it is determined that the data information of the data group number is not recorded in the data information recording unit, the data information that can be given the corresponding data group number is sent from the recording medium to the data group by the data information reading unit. And a data information reading control means for causing the data information recording means to record the data information at once.

  Further, the computer program according to the present invention reads data information from a recording medium on which a plurality of data information is recorded so as to be identifiable by an identification number, records the data information on the data information recording means, and records the data information on the data information recording means. In a computer of a data information management system that extracts predetermined data information from data information and displays it on a data information display means, data that collectively reads the data information having the consecutive identification numbers from the recording medium as one data group A data group number for identifying the data group is assigned to the information reading process and the data information collectively read as one data group in the data information reading process in association with the identification number of the data information. Data group number assignment process and data information of at least 3 data groups can be recorded Data information recording means for recording data information assigned with a data group number in the data group number assigning process for each data group, and data information recorded in the data information recording means. Data information extraction and display processing for extracting predetermined data information and displaying the extracted data information on the data information display means, and obtaining a data group number of the data information displayed on the data information display means, In the continuous data group determination process for determining whether or not the data information of the data group number continuous to the group number is recorded in the data information recording means, and in the continuous data group determination process, When it is determined that the data information is not recorded in the data information recording means, the data group number to which the corresponding data group number can be assigned. And the data information to read collectively from every data group the recording medium in the data information reading process, is characterized in that to realize the said data information recording means data information to be recorded in the reading control process.

  Furthermore, the data information management method according to the present invention reads data information from a recording medium on which a plurality of data information is recorded so as to be identifiable by an identification number, causes the data information recording means to record the data information, and causes the data information recording means to A data information management method for extracting predetermined data information from recorded data information and displaying it on a data information display means, wherein the data information having the consecutive identification numbers is stored in one data group from the recording medium. A data information reading step that reads the data information as a batch, and data information that is collectively read as a data group in the data information reading step to identify the data group in association with the identification number of the data information A data group number assigning step for assigning data group numbers and recording data information of at least three data groups Data information recording step for recording data information assigned with a data group number in the data group number assigning step for each data group, and data information recorded in the data information recording means Data information extraction step of extracting predetermined data information, displaying the extracted data information on the data information display means, and determining a data group number of the data information displayed on the data information display means, A continuous data group determination step for determining whether or not data information of a data group number continuous to the data group number is recorded in the data information recording means; and the continuous data group number in the continuous data group determination step If it is determined that the data information is not recorded in the data information recording means, the corresponding data A data information reading control step in which data information to which a number can be assigned is collectively read from the recording medium for each data group in the data information reading step and recorded in the data information recording means. To do.

  The data information recording means according to the present invention is preferably a recording means having a faster reading speed than a recording medium on which a plurality of data information is recorded. For example, it is preferable to use a memory recording medium such as a RAM as the data information recording means according to the present invention. Also, as a recording medium on which a plurality of data information is recorded, the recording capacity is larger than the data information recording means and the cost is low. It is preferable to use an inexpensive optical disk medium or hard disk.

  According to the data information management system, the computer program used in the system, and the data information management method according to the present invention, the comparison between the data information displayed on the data information display means and the data information recorded on the data information recording means If the data information continuous to the data group number of the displayed data information is not recorded in the data information recording means, the data information that can be given the corresponding data group number is set as one data group from the recording medium. Since the data information is recorded and recorded in the data information recording means, the data information of the data group continuous to the data information displayed on the data information display means is always recorded in the data information recording means. Therefore, even when the recording medium on which a plurality of data information is recorded is an optical medium or the like and it takes time to read out the data information, the data information to be displayed on the data information display means is obtained from the data information recording means. Since it can be read quickly and displayed on the data information display means, the data information can be quickly displayed on the data information display means.

  Further, since the data information of the data group continuing to the identification number of the data information displayed on the data information display means is recorded on the data information recording means, the data information before and after the data information displayed on the data information display means Can be displayed quickly, and data information before and after the displayed data information can be displayed smoothly.

  Furthermore, since the recording capacity of the data information recording means only needs to have a recording capacity capable of recording data information of about three data groups, even if the data information recorded on the recording medium is enormous, An increase in recording capacity in the data information recording means can be suppressed. For this reason, when a memory medium such as a RAM is used as the data information recording means or the like, it is possible to suppress an increase in cost due to an increase in capacity and to effectively use resources such as a memory. It becomes possible.

  Furthermore, in the present invention, since a plurality of data information is collectively read as one data group from a recording medium on which a plurality of data information is recorded, and recorded in the data information recording means for each data group, the management of data information is possible. In addition to simplification, necessary and sufficient title information can be acquired collectively by one reading process, and the process can be simplified and speeded up.

  In the data information management system, the data information display means can display a plurality of data information having consecutive identification numbers, and the number of data information displayed on the data information display means constitutes one data group. The number may be smaller than the number of data information to be performed.

  Thus, when the number of data information that can be displayed on the data information display means is smaller than the number of data information constituting one data group, the data information displayed on the data information display means is changed to other data information. Even when data information is changed in a batch, other data information that can be displayed on the data information display means can be sufficiently recorded on the data information recording means, so that the data information change display process can be performed quickly. It becomes possible.

  Further, if the number of data information that can be displayed on the data information display means is smaller than the number of data information constituting one data group, it is continuous with the data group number of the data information displayed on the data information display means. Even when the data information is not recorded in the data information recording means, the number of pieces of data information that can be displayed on the data information display means are acquired in a batch by one data information reading process, Since data can be recorded in the data information recording means, it is possible to improve the efficiency and speed of processing.

  The data information management system further includes an operation unit capable of changing data information displayed on the data information display unit, and the data information extraction and display unit is configured according to an operation of the operation unit. The data information to be displayed on the data information display means is extracted, and the continuous data group judgment means is configured to display the data information displayed on the data information display means by the data information extraction display means when the data information is changed and displayed. It may be determined whether or not data groups having consecutive data group numbers are recorded in the data information recording means.

  In this way, even when the data information extraction and display means extracts data information to be displayed on the data information display means in accordance with the operation of the operation means, in the present invention, the data information to be extracted is recorded in the data information record. Since it is recorded in the means, the data information extraction process can be quickly performed according to the operation of the operation unit. Since the change display of the data information on the data information display means can be quickly performed according to the operation of the operation means, it is possible to prevent the operator from feeling a delay in the visual operation feeling or the like.

  Further, when the data information displayed on the data information display unit is changed and displayed, the continuous data group determination unit determines whether or not the data group having the continuous data group number is recorded in the data information recording unit. Even in the configuration, after the data information of the data information display means is changed by the operation of the operation means, the data information recorded in the data information recording means is judged, and the data information reading process or the like is executed. Therefore, it is possible to perform a data information reading process that requires a processing time after promptly changing the display of the data information display means, and to give a smooth operation feeling to the user.

  By using the data information management system, the computer program used in the system, and the data information management method according to the present invention, it is possible to effectively utilize hardware resources such as a memory without impairing the user's visual operation feeling. It is possible for the user to select desired data information easily and quickly while using it.

  Hereinafter, an in-vehicle audio apparatus provided with a data information management system according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of the in-vehicle audio apparatus 1. The in-vehicle audio apparatus 1 includes a CD (CompactDisc) reproduction unit (data information reading unit) 2, an operation unit (operation unit) 3, a liquid crystal display unit (data information display unit) 4, a control unit 5, and an amplifier 6. A speaker 7 is connected to the in-vehicle audio apparatus 1.

  The CD reproducing unit 2 has a function of reading a digital signal recorded on a CD medium (recording medium). The CD playback unit 2 used in this embodiment has a function of reading and playing MP3 format music data.

  The CD playback unit 2 has a structure in which the CD medium is rotated by a spindle motor (not shown) and an optical pickup (not shown) is operated to read information recorded on the CD medium. The optical pickup includes a laser diode serving as a laser light source, an optical sensor that reads reflected light from the disk, a plurality of lenses, and the like, but detailed description thereof is omitted here.

  A plurality of pieces of music data in MP3 format with an extension of mp3 are recorded on the CD medium. It is possible to record a plurality of music data (150 or more) in MP3 format on CD media. The music data for one song is roughly composed of ID3 tag data in which a song title, artist name, etc. are recorded and audio data in which acoustic information is recorded. ID3 tag data is based on music data recorded on CD media. It is possible to know information such as the title of the recorded audio data.

  The reading process of the ID3 tag data and the reading process of the audio data in the CD reproducing unit 2 are executed according to the control instruction of the control unit 5. When audio data is read in the CD reproducing unit 2, audio data in a digital data format is decoded into analog data in a D / A conversion unit (not shown) of the CD reproducing unit 2 and output to the amplifier 6. On the other hand, when the ID3 tag data is read in the CD playback unit 2, the read information is transmitted to the control unit 5. Note that the content of the ID3 tag data transmitted from the CD playback unit 2 to the control unit 5 includes the title of the audio data, and in the present embodiment, these pieces of information are referred to as title information.

  In the present embodiment, only the CD playback unit 2 is provided as a component, but the vehicle audio device 1 may be provided with a media information reading device other than the CD playback unit 2. For example, a DVD playback unit capable of reading music data or video data recorded on DVD media can be provided, and information recorded on different media such as MD (MiniDisk) and cassette tape can be read. An apparatus may be provided. Further, a non-volatile memory such as a flash memory may be used as a medium on which music data is recorded. For example, an SD card (registered trademark), a CF (Compact Flash: registered trademark), or the like may be used. It is also possible to use a recording medium that can be attached / detached via a media slot or the like provided in the in-vehicle audio apparatus 1.

  The amplifier 6 is a device for amplifying the acoustic signal decoded in the CD reproducing unit 2. By performing the amplification process of the acoustic signal by the amplifier 6, it is possible to output a powerful sound from the speaker 7.

  The speaker 7 is a general vehicle-mounted speaker, and is provided on the front seat left and right door portions in the vehicle interior, the left and right dashboards behind the rear seat, and the like. The speaker 7 may include a tweeter for high sound output and a woofer for low sound output as necessary. Although only one speaker is shown in FIG. 1 for convenience, the number of speakers and their installation locations are not particularly limited.

  The operation unit 3 is an operation button or the like provided on the front panel or the like of the in-vehicle audio apparatus 1, and the user can perform various operations by operating the operation button or the like. For example, the operation unit 3 is provided with a playback button (not shown) for performing a sound signal playback process in the in-vehicle audio apparatus 1 and a stop button (not shown) for performing a stop process. Further, the operation unit 3 is provided with a selection button (not shown) for selecting music data to be reproduced with reference to title information displayed on the liquid crystal display unit 4. The operation information in the operation unit 3 is transmitted to the control unit 5.

  The liquid crystal display unit 4 is display means for displaying title information acquired from the control unit 5. The liquid crystal display unit 4 can display the title information of six songs as shown in FIG. When music data is selected in the title information of the six songs displayed on the liquid crystal display unit 4 by the operation of the operation unit 3 (in the case of FIG. 2A, the song title G to the song title L). The cursor 4a displayed on the liquid crystal display unit 4 moves up and down according to the display position of the title information.

  When music data other than the title information displayed on the liquid crystal display unit 4 is selected by the operation of the operation unit 3, specifically, the top title information displayed on the liquid crystal display unit 4 (FIG. 2). In the case of (a), in the state where the cursor 4a is positioned at the song title G), the cursor 4a is moved further upward or the bottom title information displayed on the liquid crystal display unit 4 (FIG. 2 (a) In the case of), when the cursor 4a is moved further downward in the state where the cursor 4a is located at the music title L), title information for six different songs is displayed on the liquid crystal display unit 4. When the title information displayed on the liquid crystal display unit 4 is less than six pieces, a blank 4b is displayed in the lower column of the liquid crystal display unit 4 as shown in FIG.

  The control unit 5 has a role of performing overall control processing in the in-vehicle audio apparatus 1. The control unit 5 is a CPU (Central Processing Unit, data group number assigning means, data information extraction / display means, continuous data group judgment means, data information reading control means) 5a that mainly performs arithmetic control processing of the in-vehicle audio apparatus 1. And a ROM (Read Only Memory) 5b in which a program for performing the arithmetic control process is recorded, information necessary for the arithmetic control process is recorded, and used as a work area for performing the process. A RAM (Random Access Memory, data information recording means) 5c and the like are included.

  Title information acquired from the CD playback unit 2 is recorded in the RAM 5c. Title information can record title information of up to 18 songs. The RAM 5c manages 6 pieces of music as one stage (one data group) according to the instruction of the CPU 5a, and manages the title information for each stage. The title information acquired from the CD playback unit 2 is stored for each stage according to the instruction of the CPU 5a. Update. When title information is recorded in the RAM 5c, a stage number (data group number) for identifying the stage is attached by the CPU 5a. For this reason, in the title information recorded in the RAM 5c, a stage number and an identification number described later are associated with each other and recorded.

  The CPU 5a of the control unit 5 executes control processing in the in-vehicle audio device 1 according to a program recorded in the ROM 5b. Specifically, the CPU 5a acquires title information (ID3 tag data information) from the CD medium by outputting a title information acquisition control signal to the CD playback unit 2. In this case, the CPU 5a identifies the title information based on the identification number given to the title information. This identification number is determined as an identification number when an individual number is assigned in advance in the ID3 tag data, and when an individual number or the like is not assigned in the ID3 tag data, The order in which the music data is read in the CD playback unit 2 (the order of the recording tracks of the music data recorded on the CD medium) is determined as an identification number, and the title information is identified.

  When the title information is read out by the CPU 5a, the CD reproducing unit 2 reads out the title information for six songs at a time by receiving the acquisition control signal once and transmits it to the CPU 5a. As described above, the title information for the six pieces of music acquired collectively in one control process is determined as one stage. The CPU 5a assigns a common stage number to the title information acquired in a lump and records it in the RAM 5c for each stage. The stage number is determined according to the identification number of the title information. In this embodiment, the title information with the identification numbers 1 to 6 is stage number 1, the title information with the identification numbers 7 to 12 is stage number 2, and the stage incremented by 1 every time the identification number increases by 6. A number is given.

  Further, the CPU 5a acquires the operation information set in the operation unit 3, extracts title information to be displayed on the liquid crystal display unit 4 from the RAM 5c according to the acquired operation information, and displays the title information on the liquid crystal display unit 4. Even if the title information is changed by the operation of the operation unit 3, the CPU 5a extracts the title information from the RAM 5c when the cursor is only moved in the title information displayed on the liquid crystal display unit 4. Absent. When the user operates the operation unit 3 in order to select title information other than the title information displayed on the liquid crystal display unit 4, for example, the cursor 4a positioned at the top title information on the liquid crystal display unit 4 moves upward. If the cursor 4a located at the bottom title information is moved downward, the CPU 5a displays the title information of the stage number continuous to the stage number of the title information displayed on the liquid crystal display unit 4. Extracted from the RAM 5 c and displayed on the liquid crystal display unit 4.

  FIG. 3A shows a display state of the liquid crystal display unit 4 in a state where the title information recorded on the CD is read for the first time after the CD is set in the CD reproducing unit 2, and FIG. It is the figure which showed the title information recorded on RAM5c.

  When a CD is set in the CD playback unit 2, the CPU 5a acquires the title information of identification numbers 1 to 6 recorded in the CD playback unit 2, attaches stage number 1 to the acquired title information, and stores it in the RAM 5c. Let me record. At this time, the CPU 5a determines from the remaining recording capacity of the RAM 5c that it is possible to acquire the title information for two more stages (12 songs), and acquires the title information of the identification numbers 7-12. The stage number 2 is added, the title information of the identification numbers 13 to 18 is acquired, the stage number 3 is added, and it is recorded in the RAM 5c as shown in FIG. Since the CPU 5a cannot obtain title information with a negative identification number from the CD playback unit 2, the CPU 5a collectively obtains title information with an identification number of 1 or more for each stage and obtains 18 pieces of title information for 3 stages. And are recorded in the RAM 5c.

  Then, the CPU 5a extracts the stage 1 title information from the title information recorded in the RAM 5c, and displays it on the liquid crystal display unit 4 as shown in FIG. Further, the CPU 5a records the position of the cursor 4a in association with the identification number of the title information recorded in the RAM 5c. Immediately after the CD is set in the CD playback unit 2, the position of the cursor 4a is recorded in association with the title information of the identification number 1, and the cursor 4a is displayed at the title information position of the identification number 1 on the liquid crystal display unit 4. .

  When the operation unit 3 is operated by the user and the cursor 4 a is moved between the title information of the identification numbers 1 to 6 displayed on the liquid crystal display unit 4, the CPU 5 a displays the display position of the cursor 4 a on the liquid crystal display unit 4. Only title change processing is performed, and different title information is not acquired from the CD playback unit 2 and title information to be recorded in the RAM 5c is not changed.

  However, when the operation unit 3 is operated by the user and the title information after the identification number 6 displayed on the liquid crystal display unit 4 is selected, specifically, the cursor is moved to the title information at the bottom of the liquid crystal display unit 4. When the cursor 4a is further moved downward in the state where is located, the CPU 5a determines the stage number based on the identification number of the title information displayed on the liquid crystal display unit 4, and the next stage number is The attached title information is extracted from the RAM 5c and displayed on the liquid crystal display unit 4.

  For example, when the cursor 4a is displayed at the position of “Song Title F” shown in FIG. 3A, the identification number 6 of the bottom title information (Song Title F) displayed on the liquid crystal display unit 4 is displayed. Based on the above, it is determined that the stage number is 1, and the title information of the identification numbers 7 to 12 with the stage number 2 as the next stage number is extracted from the RAM 5c and displayed on the liquid crystal display unit 4. 4A shows a state in which the title information (song title G to song title L) of stage 2 extracted from the RAM 5c is displayed on the liquid crystal display unit 4. FIG.

  As described above, when the title information displayed on the liquid crystal display unit 4 is changed to the title information with a different stage number, the CPU 5a displays the title information with a different stage number on the liquid crystal display unit 4, and then the liquid crystal display unit. 4, it is determined whether or not the title information of the stage number continuous to the stage number of the title information displayed in 4 is recorded in the RAM 5c, and the title information to be recorded in the RAM 5c is updated.

  As shown in FIG. 4A, when the title information of the stage number 2 is displayed on the liquid crystal display unit 4, the CPU 5a records the title information of the stage number 1 and the stage number 3 consecutive to the stage number 2 in the RAM 5c. It is judged whether it is done. When the title information displayed on the liquid crystal display unit 4 is changed from the title information of the stage number 1 shown in FIG. 3A to the title information of the stage number 2 shown in FIG. As shown in b), the title information recorded in the RAM 5c is the title information of stage numbers 1 to 3. Therefore, when the title information displayed on the liquid crystal display unit 4 is changed from the stage number 1 to the stage number 2, the CPU 5a acquires different title information from the CD playback unit 2 or records it in the RAM 5c. Do not change the title information.

  However, as shown in FIG. 4B, when the cursor 4a is further moved downward in the state where the cursor 4a is positioned at the bottom title information (song title L) of the liquid crystal display unit 4, The CPU 5a extracts from the RAM 5c the title information to which the stage number next to the stage number 2 is attached (title information to which the stage number 3 is attached), and displays it on the liquid crystal display unit 4 as shown in FIG. Display.

  As described above, when the title information of the stage number 2 displayed on the liquid crystal display unit 4 is changed to the title information with the stage number 3, the CPU 5a stores the title of the stage number continuous to the stage number 3 in the RAM 5c. It is determined whether information is recorded. When the title information displayed on the liquid crystal display unit 4 is changed from the title information of the stage number 2 to the title information of the stage number 3, as shown in FIG. 3B, the RAM 5c continues to the stage number 3. Although the title information of stage number 2 to be recorded is recorded, the title information of stage number 4 subsequent to stage number 3 is not recorded. For this reason, the CPU 5a has the identification numbers 19 to 24 (for one stage and six songs) including the identification number 19 next to the identification number 18 which is the largest identification number among the title information with the stage number 3. The title information is read by the CD playback unit 2, and the stage number 4 is added to the title information of the read identification numbers 19 to 24 and recorded in the RAM 5c. In this case, the title information of stage number 4 recorded in the RAM 5c is recorded in place of the title information of stage number 1, as shown in FIG.

  FIG. 6 is a flowchart showing a process in which the CPU 5a collectively obtains title information from the CD playback unit 2 for each stage according to the title information displayed on the liquid crystal display unit 4 and records it in the RAM 5c. The process shown in FIG. 6 is started when the operation unit 3 changes the title information displayed on the liquid crystal display unit 4 as a trigger.

  When the user performs an operation of moving the cursor displayed on the liquid crystal display unit 4 using the operation unit 3, the CPU 5 a displays the 6 pieces of music whose title information changed by the operation of the operation unit 3 is displayed on the liquid crystal display unit 4. It is determined whether or not the title information has been changed within the range of the title information (S1). In the RAM 5c, the position of the cursor 4a on the liquid crystal display unit 4 is recorded in association with the identification number of the title information. Therefore, the title information to which the cursor 4a can be moved by the operation of the operation unit 3 is determined from the identification number of the title information recorded in the RAM 5c, and the title information of the determined identification number is displayed on the liquid crystal display unit 4. It is determined whether the information is title information, that is, whether the title information has the same stage number as the stage number of the title information displayed on the liquid crystal display unit 4.

  When the stage number of the title information to which the cursor 4a can be moved is the same as the stage number of the title information displayed on the liquid crystal display unit 4, the title information changed by the operation of the operation unit 3 is the liquid crystal display unit 4 If the stage number is different, it is changed to title information other than the title information of the six songs displayed on the liquid crystal display unit 4. Judge that

  When it is determined that the title information is changed within the range of the title information displayed on the liquid crystal display unit 4 (Yes in S1), the CPU 5a moves and displays the cursor 4a displayed on the liquid crystal display unit 4 to predetermined title information. (S2) The title information identification number of the moved cursor 4a is recorded in the RAM 5c, and the process is terminated.

  On the other hand, when it is determined that the cursor 4a is changed to title information other than the title information displayed on the liquid crystal display unit 4 (No in S1), the CPU 5a determines the stage number to which the title information to be newly displayed belongs. Judgment is made based on the identification number etc. of the currently displayed title information (S3), and the title information for the six songs with the determined stage number is extracted from the RAM 5c (S4, data information extraction display display) Process, data information extraction and display step), and display on the liquid crystal display unit 4 (S5, data information extraction and display process, data information extraction and display step).

  Then, the CPU 5a determines whether or not the title information of the stage number continuous to the stage number determined in the process of S3 is recorded in the RAM 5c (S6, continuous data group determination process, continuous data group determination step). . For example, when the stage number extracted in the process of S3 is stage number 2, when title information (18 pieces) of continuous identification numbers 1 to 18 from stage number 1 to stage number 3 is recorded, It can be determined that title information with consecutive stage numbers is recorded. In addition, when the stage number extracted in the process of S3 is stage number 1, there is no stage number to which a negative value is added, so that consecutive identification numbers 1 to 18 from stage number 1 to stage number 3 are present. When title information is recorded, it is determined that title information with consecutive stage numbers is recorded in the RAM 5c.

  When it is determined that title information with consecutive stage numbers is recorded (Yes in S6), the CPU 5a ends the process without changing the title information described in the RAM 5c.

  On the other hand, when it is determined that title information with consecutive stage numbers is not recorded (No in S6), for example, the stage number extracted in the process of S3 is stage number 3. , Title information (18 pieces) of consecutive identification numbers 1 to 18 from stage number 1 to stage number 3 is recorded in RAM 5c, and title information of stage number 4 continuing from stage number 3 is recorded in RAM 5c. If not, the CPU 5a determines consecutive stage numbers not recorded in the RAM 5c based on the stage numbers extracted in the process of S3 (S7), and an identification number to which the corresponding stage number can be given is attached. The CD playback unit 2 reads the title information of six consecutive songs at once (S8, data information reading process). , Data information reading step, the data information reading control process, data information reading step, the data information reading control step). Then, the CPU 5a attaches a stage number to the read title information (S9, data group number assigning process, data group number assigning step) and records it in the RAM 5c (S10, data information reading process, data information reading step, data Information reading control process, data information reading step, data information reading control step), and the process ends. Hereinafter, the above-described process is repeatedly executed with the change of the title information displayed on the liquid crystal display unit 4 performed by the operation of the operation unit 3 as a trigger.

  Thus, by recording the title information with the newly added stage number in the RAM 5c, even if the title information displayed on the liquid crystal display unit 4 is changed by the operation of the operation unit 3, the change is made. Since the title information that can be obtained is already recorded in the RAM 5c, the title information of the liquid crystal display unit 4 can be quickly changed, and the operator can be prevented from feeling a delay in visual operation feeling or the like.

  Even when the title information of the liquid crystal display unit 4 is changed by the operation of the operation unit 3, the CD playback unit 2 is changed after the title information change process (the process of S5) of the liquid crystal display unit 4 is performed. Since newer title information is acquired and recorded in the RAM 5c (processing of S8 to S9), the display changing process of the liquid crystal display unit 4 is quickly performed, and the reading process of the CD reproducing unit 2 which requires processing time is performed. This makes it possible to provide a user with a smooth operation feeling.

  Furthermore, in the in-vehicle audio apparatus according to the present invention, the title information for three stages (18 songs) can be recorded in the RAM 5c, so that the title information can be displayed quickly and smoothly on the liquid crystal display unit 4. Compared to recording all title information (for example, 150 songs) recorded on a CD in a memory (recording medium), the memory capacity can be reduced, and cost can be reduced and memory can be used effectively. It can be realized.

  Further, since the control unit 5 can acquire the title information for one stage (six songs) with a single command to the CD playback unit 2, in the process shown in FIG. It is possible to acquire necessary and sufficient title information at once. For this reason, the CPU 5a can minimize the number of times of transmission / reception of information necessary for obtaining the title information, and can simplify and speed up the processing.

  As described above, the case where the data information management system according to the present invention is used for the in-vehicle audio apparatus 1 has been described. However, the data information management system according to the present invention is not limited to that shown in the above-described embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above embodiment, the title information for six songs is displayed on the liquid crystal display unit 4, but the number of title information that can be displayed on the liquid crystal display unit 4 may be six or less. If the number of title information that can be displayed on the liquid crystal display unit 4 is less than or equal to the number of title information (6 songs) constituting one stage, the title information can be stored within the range of title information having the same stage number by the operation of the operation unit 3. As long as the change is made, there is no need to perform a process for newly acquiring title information in the CD playback unit 2 or a process for newly recording the acquired title information in the RAM 5c. For this reason, even when the number of title information items that can be displayed on the liquid crystal display unit 4 is six or less, as described above, it is possible to perform a quick display change process corresponding to the operation on the operation unit 3, and It is possible to suppress delays in visual operation feeling.

  In the above embodiment, the music compression method of the MP3 format is described as an example of the music compression method of the music data recorded on the CD medium. However, the music compression method recorded on the CD media is the MP3 format. It is not limited to. Any recording format may be used as long as it is a recording format having a higher compression rate than that of music data recorded on a general music CD and can be read by the CD playback unit 2. For example, music data recorded by a music compression method such as the WMA (Windows (registered trademark) Media Audio) format or the Ogg Vorbis format can be used.

  In the above embodiment, the processing contents in the CPU 5a are realized by a program recorded in the ROM 5b. This program also relates to the present invention. A program is not necessarily limited to what is recorded on ROM5b of the control part 5, For example, a program may be recorded on recording media, such as CD-ROM and DVD-ROM. Further, even when the program is provided through a communication line or the like, the program provided using the communication line as a medium corresponds to the program according to the present invention.

It is the block diagram which showed schematic structure of the vehicle-mounted audio apparatus which concerns on embodiment. It is the figure which illustrated the title information displayed on the liquid crystal display part which concerns on embodiment. (A) is another figure which illustrated title information displayed on a liquid crystal display part, and (b) is a figure which illustrated data contents which showed title information etc. which are recorded on RAM. It is another figure which illustrated title information displayed on a liquid crystal display part concerning an embodiment. (A) is another figure which illustrated title information displayed on a liquid crystal display part, and (b) is another figure which illustrated data contents which showed title information etc. which are recorded on RAM. It is the flowchart which showed the process of CPU which concerns on embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted audio apparatus 2 ... CD reproduction part (data information reading means)
3 ... operation part (operation means)
4 ... Liquid crystal display (data information display means)
4a ... cursor 4b ... blank 5 ... control unit 5a ... CPU (data group number assigning means, data information extracting and displaying means, continuous data group judging means, data information reading control means)
5b ROM
5c ... RAM (data information recording means)
6 ... Amplifier 7 ... Speaker

Claims (5)

Data information reading means capable of reading the data information having consecutive identification numbers as a single data group from a recording medium in which a plurality of pieces of data information are recorded so as to be identifiable by identification numbers;
Data group number assigning means for assigning a data group number for identifying the data group in association with the identification number of the data information to the data information collectively read as one data group by the data information reading means When,
A data information recording unit that has a recording capacity capable of recording data information of at least three data groups, and records the data information assigned with the data group number by the data group number assigning unit for each data group;
Data information display means for displaying the data information;
Data information extraction and display means for extracting predetermined data information from the data information recorded in the data information recording means and displaying the data information on the data information display means;
Continuous data for determining a data group number of data information displayed on the data information display means and determining whether data information of a data group number subsequent to the data group number is recorded in the data information recording means Group judgment means,
When it is determined by the continuous data group determination means that the data information of the continuous data group number is not recorded in the data information recording means, the data information that can be given the corresponding data group number is read from the data information A data information management system comprising: data information reading control means for causing the data information recording means to read the data information from the recording medium in a batch for each data group. The data information display means can display a plurality of data information in which the identification numbers are continuous,
2. The data information management system according to claim 1, wherein the number of data information displayed on the data information display means is smaller than the number of data information constituting the one data group. An operation means capable of changing data information displayed on the data information display means;
The data information extraction and display means extracts data information to be displayed on the data information display means in response to an operation of the operation means,
When the data information displayed on the data information display means is changed and displayed by the data information extraction and display means, the continuous data group determination means causes the data group of the continuous data group numbers to be stored in the data information recording means. The data information management system according to claim 1, wherein it is determined whether or not it is recorded. Data information is read from a recording medium on which a plurality of data information is recorded so as to be identifiable by an identification number, recorded on the data information recording means, and predetermined data information is extracted from the data information recorded on the data information recording means. In the computer of the data information management system to be displayed on the data information display means,
A data information reading process for reading the data information having consecutive identification numbers from the recording medium as one data group;
Data group number assigning process for assigning a data group number for identifying the data group in association with the identification number of the data information to the data information collectively read as one data group in the data information reading process When,
A data information recording process for recording data information assigned with a data group number in the data group number assigning process for each data group with respect to data information recording means capable of recording data information of at least three data groups; ,
Data information extraction display processing for extracting predetermined data information from the data information recorded in the data information recording means and displaying the extracted data information on the data information display means;
Continuous data for determining a data group number of data information displayed on the data information display means, and determining whether data information of a data group number subsequent to the data group number is recorded in the data information recording means Group judgment processing;
In the continuous data group determination process, when it is determined that the data information of the continuous data group number is not recorded in the data information recording unit, the data information that can be given the corresponding data group number is read out from the data information reading unit. A computer program that realizes a data information reading control process in which data is read from the recording medium for each data group in a process and recorded in the data information recording means. Data information is read from a recording medium on which a plurality of data information is recorded so as to be identifiable by an identification number, recorded on the data information recording means, and predetermined data information is extracted from the data information recorded on the data information recording means. A method for managing data information to be displayed on the data information display means,
A data information reading step for collectively reading the data information having the consecutive identification numbers from the recording medium as one data group;
Data group number assigning step for assigning a data group number for identifying the data group in association with the identification number of the data information to the data information collectively read as one data group in the data information reading step When,
A data information recording step for recording data information assigned with a data group number in the data group number assigning step for each data group with respect to data information recording means capable of recording data information of at least three data groups; ,
A data information extracting and displaying step of extracting predetermined data information from the data information recorded in the data information recording means and displaying the extracted data information on the data information display means;
Continuous data for determining a data group number of data information displayed on the data information display means and determining whether data information of a data group number subsequent to the data group number is recorded in the data information recording means Group judgment step;
In the continuous data group determining step, when it is determined that the data information of the continuous data group number is not recorded in the data information recording means, the data information that can be given the corresponding data group number is read out from the data information reading unit. A data information management method comprising: a data information reading control step of causing the data information recording means to collectively read the data from the recording medium in the step.

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