JP4998051B2 - File name acquisition device, file name acquisition method, and program - Google Patents

Description

  The present invention relates to a file name acquisition device, a file name acquisition method, and a program, and more particularly to a file name acquisition device, a file name acquisition method, and a program suitable for an audio device.

  In recent years, an audio apparatus capable of playing back a compressed audio file (for example, MP3 or WMA format file) stored in a storage medium such as a USB (Universal Serial Bus) flash memory or an SD memory card (Secure Digital Memory Card). Is popular. When a file stored in a storage medium is selected or played back, for example, a predetermined file is specified under the control of a system microcomputer provided in the audio device, and the file of the specified file is specified by a processor such as a DSP (Digital Signal Processor). After the name is acquired, it is displayed on the display unit. The user of the audio device can select and reproduce a desired audio file from the file names displayed on the display unit.

  When the file name is long, the number of characters that can be displayed at one time may be limited depending on the size of the display area of the display unit. Therefore, a method for scrolling and displaying file names is known.

  With reference to FIG. 4, the scroll display of long file names will be described. The character string 41 to be displayed is a character string of 20 characters consisting of “ABCDEFGHIJKLMNOPQRST”, and is a character string to be displayed on the display unit.

  The initial display 42 is a character string that is initially displayed on the display unit based on the character string 41 to be displayed when the number of displayable characters on the display unit is 12.

  The scrolling 43 is a character string displayed on the display unit after scrolling the character string shown on the initial display 42 when the character string displayed on the display unit scrolls from right to left.

  Scrolling 44 is a character string displayed on the display unit after the character string shown in scrolling 43 is further scrolled.

  The scroll end 45 indicates a state of the display unit when the scrolling is finished after the character string shown in the scrolling 44 is further scrolled.

Patent Document 1 discloses a technique in which when a file name is displayed on the display unit, an alias of the file name, which is a character string having a number of characters suitable for the size of the display area of the display unit, is acquired from the storage unit and displayed. It is disclosed.
JP 2006-99898 A

  However, in the above-described conventional audio apparatus, when the file name acquired by the DSP is long, the number of characters that can be handled as the file name is limited due to the memory capacity allocated for acquiring the file name and communication restrictions. There is.

  Therefore, for example, the file name is 30 characters including the extension (in the case of a WMA format file, the “.wma” portion), whereas the display unit can display only 20 characters. Arise. In such a case, the character string displayed on the display section even when scrolling is limited to 20 characters from the beginning of the file name, so the file extension cannot be displayed, and the user can use any file format. I can't know if it exists. When playback is started (that is, the file is opened), information on the file format is acquired from the file by the DSP, so that the file format can be displayed on the display unit, but the file before playback is displayed. I can't.

  Further, in the method as disclosed in Patent Document 1, it is necessary to separately prepare a table for managing file name aliases in the storage unit. Moreover, since the extension is not displayed, the file format cannot be confirmed.

  An object of the present invention is to handle a character string obtained by adding an extension to a file name of the number of acquired characters as a file name without opening the file when the file name exceeds the number of characters that can be acquired A name acquisition device, a file name acquisition method, and a program are provided with a simple configuration.

The invention according to claim 1 is a file name acquisition device,
A storage unit storing a file system for storing data as a file and managing information on the file;
A file name acquisition unit for acquiring a file name from the file system;
If the file name acquired by the file name acquisition unit is greater than or equal to the number of characters that can be acquired by the file name acquisition unit, characters of an extension that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition unit, and a file name handled by the file name acquisition unit A control unit for controlling to
It is provided with.

The invention according to claim 2 is the file name acquisition device according to claim 1,
The file name acquisition unit acquires a long file name and a short file name as a file name managed by the file system,
The control unit, when the long file name acquired by the file name acquisition unit is more than the number of characters that can be acquired by the file name acquisition unit, from the short file name acquired by the file name acquisition unit The file name acquisition unit obtains the character string obtained by adding the character string of the extension to the character string of the long file name that can be acquired by the file name acquisition unit. Control the file name to handle,
It is characterized by.

The invention according to claim 3 is the file name acquisition device according to claim 1 or 2,
It has a display part which displays the filename controlled so that the said filename acquisition part may handle by the said control part.

The invention according to claim 4 is the file name acquisition device according to any one of claims 1 to 3,
The storage unit is detachable from the display device.

The invention according to claim 5 is the file name acquisition method,
Storing the data as a file and storing a file system that manages information about the file in the storage unit;
A file name acquisition step of acquiring a file name from the file system by a file name acquisition unit;
If the file name acquired by the file name acquisition step is greater than or equal to the number of characters that can be acquired by the file name acquisition step, an extension character that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition unit, and a file name handled by the file name acquisition unit A control process for controlling
It is provided with.

Invention of Claim 6 memorize | stores the computer as data as a file, The memory | storage means in which the file system which manages the information regarding the said file was stored,
File name acquisition means for acquiring a file name from the file system;
If the file name acquired by the file name acquisition unit is greater than or equal to the number of characters that can be acquired by the file name acquisition unit, characters of an extension that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition means, and a file name handled by the file name acquisition means Control means to control,
It is a program for making it function as.

  According to the present invention, when a file name exceeds the number of characters that can be acquired, a file that handles a character string obtained by adding an extension to the file name of the acquired number of characters as a file name without opening the file A name acquisition device, a file name acquisition method, and a program can be provided with a simple configuration.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to this embodiment.

[Configuration of audio device]
The present embodiment is an example of a display device provided in an audio device.
First, the overall configuration of the audio device will be described. Examples of the audio device 1 include home audio, car audio, and portable audio devices.

  As shown in FIG. 1, the audio device 1 includes a storage unit 2, an analog audio input unit 5, a CD (Compact Disk) mechanism unit 6, a selector 7, an ADC (Analog Digital Converter) 8, a DSP 9, and a DAC (Digital Analog Converter). 10, an amplifier unit 11, a speaker 12, a display unit 13, an operation unit 14, a system microcomputer 15, a connection slot 16, and a connection connector 17.

  As the storage unit 2, an HDD (Hard Disk Drive) or the like is used. The storage unit 2 stores digital audio data that can be reproduced by the audio apparatus 1 as a file in the form of an MP3 file, a WMA file, or the like. In addition, a file system is stored in the storage unit 2, and information regarding the file is stored and managed by the file system.

  Here, the file system means software or management information for managing filed data in the storage unit. The management information includes a file long file name, a short file name, information on a file format, and the like.

  As a file system, for example, FAT and NTFS in a Windows (registered trademark) system are known. A file system is also stored in the SD memory card 3 and the USB flash memory 4.

  The long file name is the name of the file displayed on the display unit 13. The short file name is a name of a file that is named with a limited number of characters (for example, 8 characters) compared to the long file name. Both file names have an extension.

  The analog voice input unit 5 is an input unit that inputs an analog voice signal output from an external device (not shown) or the like.

  The CD mechanism unit 6 is a device such as a CD drive and reads and outputs data recorded on the CD.

  The selector 7 is a circuit that selects a source of audio data to be reproduced by the audio apparatus 1. The source selection is switched according to the control signal input from the system microcomputer 15.

  The ADC 8 is an A / D conversion circuit that converts an input analog signal into a digital signal and outputs the digital signal.

  The DSP 9 is a signal processing processor and includes an encoder 9a and a decoder 9b. The encoder 9a encodes a digital signal input via the analog audio input unit 5 and converted by the ADC 8. The decoder 9b decodes the compressed signals from the storage unit 2, the SD memory card 3, and the USB flash memory 4 and performs a reproduction process. In this reproduction process, various information such as a file name is acquired from the file system stored in the storage unit 2, the SD memory card 3, and the USB flash memory 4.

  The DAC 10 is a circuit that converts a digital signal output from the DSP 9 into an analog signal and outputs the analog signal.

  The amplifier unit 11 is a D / A conversion circuit that amplifies an analog signal output from the DAC 10 and outputs the amplified analog signal to the speaker 12.

  The speaker 12 is a device that outputs an analog signal output from the amplifier unit 11 as a sound wave.

  The display unit 13 displays the file name of the audio data file that can be reproduced by the audio apparatus 1 in addition to various information such as the operation mode of the audio apparatus 1 and music information, and also displays various operation input switch screens.

  The operation unit 14 is a device having various operation keys, and outputs an operation signal to the system microcomputer 15 in accordance with operation of the operation keys by the user of the audio device 1.

  The system microcomputer 15 functions as a control unit, and includes a ROM (Read Only Memory) 15a and a RAM (Random Access Memory) 15b. The system microcomputer 15 reads a control program from the ROM 15a and the like and develops it in the RAM 15b. Each unit in the apparatus 1 is intensively controlled and performs various calculations.

  The connection slot 16 is a connection slot for the SD memory card 3 as an external memory. The connection connector 17 is a connector for connecting the USB flash memory 4 as an external memory.

[Configuration of file name acquisition device]
In the audio device 1 described above, in a preferred aspect of the file name acquisition device according to the present invention, the file name acquisition device includes a storage unit 2 for storing and managing music data files by the file system, and a file name from the file system. The DSP 9 to be acquired and the system microcomputer 15 that acquires the file name from the DSP 9 in order to display the file name on the display unit 13 are embodied.

[Operation]
Next, an example of a file name display operation will be described with reference to FIG.
This operation example is an example of a control flow that the DSP 9 acquires in order to display the file name of the WMA format music data file stored in the USB flash memory 4 on the display unit 13.

  This control process starts when the DSP 9 acquires a long file name managed by the file system stored in the USB flash memory 4.

  First, a long file name is acquired from the DSP 9 (step S1).

  Next, when the last character string in the acquired long file name character string is an extension (step S2: Yes), the system microcomputer has acquired all the file names of the long file names, and thus acquired them. The long file name is handled as it is as a file name handled by the system microcomputer and displayed on the display unit 13 (step S3).

  If the last character string in the acquired long file name character string is not an extension (step S2: No), that is, the system microcomputer cannot acquire the total number of characters of the long file name character string, If the character string representing the child is not obtained or the character string representing the extension is only obtained partway, the short file name of the file system stored in the USB flash memory 4 is obtained by the DSP 9 (step S4). .

  Next, the character string of the extension portion is acquired from the acquired short file name (step S5).

  Next, a character string corresponding to the number of acquirable characters is acquired from the beginning of the character string of the long file name acquired in step S1. If the number of characters of the extension (for example, “.wma”) A character string of 4 characters) is removed (step S6).

  Next, the character string with the extension obtained in step S5 is added to the end of the character string obtained in step S1, and the file name handled by the system microcomputer 15 is displayed on the display unit 13 (step S6). The process ends.

  In the above control flow, the example in which the file name of the music data file stored in the USB flash memory 4 is displayed on the display unit 13 has been described, but other storage media such as the storage unit 2 or the SD memory card 3 The same control flow is performed when the file name of the music data file stored in is displayed.

  Further, in the present embodiment, after the character string for the number of extension characters is removed from the long file name character string for the number of acquirable characters in step S6, the extension character string is converted in step S7. Although added, it is not limited to this format. The character string corresponding to the number of characters of the extension may be added as it is without being removed.

  In step S4, the short file name is acquired to acquire the extension character string. However, the present invention is not limited to this method, and the extension character string information may be acquired by another method. . For example, when the character string information of the extension is managed independently in the file system, the character string information of the extension may be acquired. Alternatively, when file format information is managed in the file system, the information may be acquired and converted into an extension character string based on a correspondence table stored in advance in a memory such as the ROM 15a. good.

  Further, the display method of the character string performed in step S7 is to scroll and display when the number of characters of the character string to be displayed exceeds the number of characters that can be displayed on the display unit 13 at one time. , Display without scrolling. This is an example of a display method and is not limited to this method.

  With reference to FIG. 3, an example of a method for displaying a long file name on the display unit 13 will be described. The long file name 21 is a 30-character file name consisting of a character string “ABCDEFGHIJKLMNOPQRSTUVWXYZ.WMA” managed by the file system.

  The acquired character string 22 is a character string from which the long file name 21 is acquired from the DSP 9 by the system microcomputer 15 when the number of characters that can be acquired by the file name is 20.

  The displayed character string 23 is a character string obtained by adding the character string of the extension acquired from the file system to the acquired character string 22 and is displayed on the display unit 13.

  The initial display 24 is a character string that is initially displayed on the display unit 13 based on the displayed character string 23 when the number of characters that can be displayed on the display unit 13 is 12.

  The scrolling 25 is a character string displayed on the display unit 13 after scrolling the character string shown on the initial display 24 when the character string displayed on the display unit 13 scrolls from right to left.

  The scrolling 26 is a character string displayed on the display unit 13 after the character string shown in the scrolling 25 is further scrolled.

  The scroll end 27 indicates the state of the display unit 13 when the scrolling is finished after the character string shown in the scroll 26 is further scrolled.

[effect]
As described above, according to the present embodiment, when the number of characters in the file name exceeds the number of characters that can be handled due to the memory capacity allocated to the RAM 15b, communication restrictions, or the like, the file can be easily opened without opening it. The file name can be displayed with an extension depending on the configuration.

  In addition, since the information about the extension is acquired from the file system that is always provided in the storage medium for storing the file, it is not necessary to separately manage the information about the extension in the storage unit 2 or the like.

It is a block diagram which shows an example of a structure of an audio apparatus. It is a flowchart which shows the control flow which a system microcomputer performs. It is a figure which shows an example of the display method of a long file name. It is a figure which shows an example of the display method of the file name in the conventional audio apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Audio apparatus 2 Memory | storage part 3 SD memory card 4 USB flash memory 5 Analog audio | voice input part 6 CD mechanism part 7 Selector 8 ADC
9 DSP
9a Encoder 9b Decoder 10 DAC
11 Amplifier unit 12 Speaker 13 Display unit 14 Operation unit 15 System microcomputer 15a ROM
15b RAM
16 Slot for connection 17 Connector for connection

Claims (6)

A storage unit storing a file system for storing data as a file and managing information on the file;
A file name acquisition unit for acquiring a file name from the file system;
If the file name acquired by the file name acquisition unit is greater than or equal to the number of characters that can be acquired by the file name acquisition unit, characters of an extension that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition unit, and a file name handled by the file name acquisition unit A control unit for controlling to
A file name acquisition device comprising: The file name acquisition unit acquires a long file name and a short file name as a file name managed by the file system,
The control unit, when the long file name acquired by the file name acquisition unit is more than the number of characters that can be acquired by the file name acquisition unit, from the short file name acquired by the file name acquisition unit The file name acquisition unit obtains the character string obtained by adding the character string of the extension to the character string of the long file name that can be acquired by the file name acquisition unit. Control the file name to handle,
The file name acquisition device according to claim 1.   The file name acquisition apparatus according to claim 1, further comprising a display unit configured to display a file name controlled so as to be handled by the file name acquisition unit by the control unit. The file name acquisition device according to any one of claims 1 to 3, wherein the storage unit is detachable from the display device. Storing the data as a file and storing a file system that manages information about the file in the storage unit;
A file name acquisition step of acquiring a file name from the file system by a file name acquisition unit;
If the file name acquired by the file name acquisition step is greater than or equal to the number of characters that can be acquired by the file name acquisition step, an extension character that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition unit, and a file name handled by the file name acquisition unit A control process for controlling
A file name acquisition method characterized by comprising: A storage means for storing a file system for storing data as a file and managing information relating to the file;
File name acquisition means for acquiring a file name from the file system;
If the file name acquired by the file name acquisition unit is greater than or equal to the number of characters that can be acquired by the file name acquisition unit, characters of an extension that is information on the file format of the file corresponding to the file name from the file system A string obtained by adding a character string of the extension to a character string of the number of characters that can be acquired by the file name acquisition means, and a file name handled by the file name acquisition means Control means to control,
Program to function as.

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