KR20070005364A - Method for providing play list file of mp3 player - Google Patents

Abstract

A method for supplying a reproduction list file is provided to effectively use a memory storing the reproduction list file in a portable device by converting the reproduction list file to have the minimum size while the reproduction file list is supplied to a portable device. One or more audio files are stored in a memory of a portable reproducing device. A reproduction list file for the stored audio files is created in an external device signal-connected to the portable reproducing device(S11). The created reproduction list file is converted to have the minimum size according to a predetermined format(S12). The converted reproduction list file is supplied to the portable reproducing device(S13). The audio files are capable of being MP3 files.

Description

How to provide playlist file {Method for providing play list file of MP3 player}

1 shows a recording format of an MP3 audio file,

2 illustrates a playlist file (M3U file),

3 is a block diagram of an embodiment of a portable playback device (MP3 Player) in which a playlist file providing method according to the present invention is implemented and an external device (PC) connected thereto.

Figure 4 shows the flow of a preferred embodiment of a playlist file providing method according to the present invention,

5 illustrates a playlist file converted according to the present invention.

※ Explanation of code for main part of drawing

10: memory 11: LCD

12: key input unit 13: decoder

14: microcomputer 15: audio signal processing unit

16, 21: USB 22: WINAMP P / G

23: control unit 100: MP3 player

200: PC

The present invention relates to a method for providing a playlist file, and more particularly, to a method for generating a playlist file from an external device connected to a portable playback device and converting the playlist file into a minimum size to provide the playlist file to the portable playback device.

1 is a diagram illustrating a recording format of an MP3 audio file, wherein the MP3 audio file includes a header having a fixed length of 4 bytes and at least one frame having an arbitrary variable length. A 128-byte ID3 tag (Tag) in which the file information (File_Info) for the MP3 audio file is recorded is recorded. The tag records file information (song information: artist name and song name, etc.) for the MP3 audio file.

Therefore, in a playback device such as an MP3 player, a tag of each MP3 audio file stored in a file storage area of the internal memory is searched to read necessary data, and the file information of the corresponding file is provided through a liquid crystal display (LCD). In addition, a series of reproducing operations are performed to restore and reproduce the audio data compressed and recorded in the frame into high quality audio data using the information recorded in the header.

Meanwhile, in the case of an external device (PC) connected to the MP3 player, an audio file stored in the memory of the playback device is stored using a corresponding PC application program, that is, a media playback application program (for example, WINAMP P / G). The user can select the audio file to be included in the playlist through the search.

When the audio file is selected in this way, the application program creates a playlist for the selected audio file, and generates a playlist file (eg, an M3U file) of a predetermined type with reference to the playlist. In this case, the application program records the file name and full path of each audio file stored in the playlist in the M3U file, so that the M3U file is in the form of FIG. 2.

The PC provides the generated M3U file to the MP3 player to be stored in a designated area of the memory. The search of the audio file and the provision of the M3U file are performed by a predetermined interface between the external device and the MP3 player. For example, this can be done via USB (Universal Serial Bus).

Meanwhile, the MP3 player may sequentially play each audio file stored in the M3U file at the user's request.

However, in the above-described conventional playlist file providing method, when the playlist file is generated by the external device, as shown in FIG. 2, the full storage path is recorded together with the file name of each audio file, thereby generating a playlist file (M3U file). In this case, the size of the file is large and it is difficult to efficiently use the memory in which the playlist file is stored by providing the generated playlist file as it is to the portable playback device connected to the signal.

In addition, conventionally, when searching for an audio file based on a playlist file in the playback device, all the full storage paths must be found, thereby increasing the command processing routine, which causes a lot of time to be spent searching for the file. .

Accordingly, the present invention was created to solve the above problems, and when generating a playlist file in an external device (PC) connected to a portable playback device (MP3 player), a file name and a full storage for each audio file are stored. Record the path, but when providing the playlist file to the portable player, the portable player can convert the audio file stored in the playlist file to have only the file name and the lowest folder name. Provides a method of providing a playlist file that can efficiently use the memory where the file is stored and reduces the command processing routine by recording only the lowest folder name in the file storage path. To do that,

In the case where the portable playback device provides the playlist file to the external device, the playlist file is converted into a file name and a full storage path for each audio file stored in the playlist file. It is an object of the present invention to provide a playlist file providing method for recognizing a text file and allowing editing and playback operations therefrom.

The playlist file providing method according to the present invention for achieving the above object, in the state in which at least one audio file is stored in the memory of the portable playback device, the stored audio in an external device connected to the portable playback device Generating a playlist file for the file; Converting the generated playlist file to a minimum size according to a predetermined format; And providing the converted playlist file to the portable playback device.

Hereinafter, an embodiment of a playlist file providing method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 illustrates a configuration of an embodiment of a portable playback apparatus (MP3 Player) 100 and an external device (PC) 200 connected thereto in which a playlist file providing method according to the present invention is implemented. The MP3 player 100 includes a memory 10 in which a plurality of MP3 audio files and playlist files (M3U files) and the like are stored; An LCD 11 for displaying a playlist, file information (song information), the current operating state of the apparatus, and the like; A key input unit 12 for inputting a user; A decoder 13 for decoding the compressed audio data into original audio data; An audio signal processor (15) for processing the decoded audio data into a reproduced audio signal; A microcomputer 14 for controlling and performing the playlist file conversion and provision and playback operations according to the present invention; And a USB 16 for interfacing with the PC 200.

In addition, the PC 200, USB 21 for the interface with the MP3 player 100; A media playback application (eg, WINAMP P / G) 22 which generates a playlist file for each audio file stored in the memory 10 and plays each audio file stored in the playlist file; And a controller 23 for controlling and performing an operation of converting the generated playlist file of the playlist file into a predetermined format and providing the converted file to the MP3 player 100. .

4 illustrates a flow of a preferred embodiment of a method of providing a playlist file according to the present invention. Hereinafter, the method of providing a playlist file of FIG. 4 according to the present invention will be described in detail with reference to the configuration of FIG. 3. .

First, at least one MP3 audio file is stored in the memory 10 of the MP3 player 100.

In this state, the user connects the MP3 player 100 with the PC 200 and then searches for an audio file stored in the memory 10 using the media playback application 22 of the PC 200. The search may select an audio file to be included in the playlist.

When the audio file is selected in this way, the media playback application 22 creates a playlist for the selected audio file, while referring to the playlist, a playlist file of a predetermined type (for example, M3U file), in which the application program 22 records the file name and full path of each audio file stored in the playlist in the M3U file, so that the M3U file is eventually stored in FIG. 2. Form.

On the other hand, when the controller 23 provides the generated M3U file to the MP3 player 100, the controller 23 converts (edits) the generated M3U file into a predetermined format. In this case, the controller 23 In order to make the M3U file have a minimum size, the M3U file is converted to have only a file name and a lowest folder name for each audio file stored in the M3U file.

The controller 23 transmits the converted M3U file to the MP3 player 100 through the USB 21, and accordingly, the microcomputer 14 transmits the transferred M3U file through the USB 16. The received M3U file is received and stored in the memory 10. Since the transmitted M3U file is converted to have a minimum size, it can be stored in the minimum area of the memory 10.

As described above, when the M3U file is stored in the MP3 player 100, the microcomputer 14 may sequentially play each audio file included in the M3U file at the user's request. The operation is briefly described as follows.

First, the microcomputer 14 quickly retrieves each audio file from the memory 10 from the lowest folder name of each audio file stored in the M3U file, and uses the information recorded in the header of the retrieved audio file. The audio data compressed and recorded in the frame is read from the memory 10, and the decoder 13 restores the read compressed audio data to the original audio data and outputs the original audio data to the audio signal processor 15. Accordingly, the audio signal processor 15 performs a normal playback operation of signal-processing the restored audio data as a playback audio signal, and outputs the audio files as high quality audio data.

Meanwhile, when the MP3 player 100 provides the converted and stored M3U file to the PC 200, the microcomputer 14 may recognize and edit the converted and stored M3U file of FIG. 5 on the PC 200. In order to do this, a predetermined format, i.e., the original format, is converted to the M3U file by referring to the playlist for each audio file stored in the memory 10. By recording the full path along with the file name of each stored audio file, the M3U file is eventually converted to the form of FIG.

The microcomputer 14 transmits the converted M3U file to the PC 200 through the USB 16, and accordingly, the controller 23 receives the transmitted M3U file through the USB 21. In the received M3U file, a full storage path is recorded along with the file name of each audio file, so that the controller 23 can recognize the M3U file, edit the M3U file, and store each of the M3U files. Audio file can be played.

The above-described preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve, change, and substitute various other embodiments within the technical spirit and scope of the present invention disclosed in the appended claims below. Or addition may be possible.

In the playlist file providing method according to the present invention as described above, when generating a playlist file in an external device (PC) connected to a portable playback device (MP3 player), a file name and a full storage path are set for each audio file. When recording the playlist file to the portable playback device, the portable playback device is provided by converting each audio file stored in the playlist file to have only a file name and a lowest folder name to provide a playlist file having a minimum size. In this case, the memory in which the playlist file is stored can be used efficiently, and the file storage path is recorded only at the lowest folder name, thereby reducing the command processing routine so that the audio file can be found more quickly.

When the playlist file is provided to the external device by the portable player, the playlist is converted into a file name and a full storage path for each audio file stored in the playlist file. It is a very useful invention that can recognize a file, and from this, editing and reproducing operations are possible.

Claims (7)

With one or more audio files stored in the memory of the portable playback device, Generating a playlist file for the stored audio file at an external device connected to the portable playback device; Converting the generated playlist file to a minimum size according to a predetermined format; And And providing the converted playlist file to the portable playback device. The method of claim 1, And the audio file is an MP3 file. The method of claim 1, The playlist file is a playlist file providing method, characterized in that the M3U file. The method of claim 1, The playlist file generating step may include: creating a playlist for the stored audio file; And And generating a file in which the file name of each audio file stored in the playlist and the full path are recorded. The method of claim 4, wherein The playlist file converting step, wherein the playlist file providing method, characterized in that for converting each audio file stored in the playlist file to have only a file name and the lowest folder name. The method of claim 1, And receiving and storing the converted playlist file provided from the external device. The method of claim 6, Converting the stored playlist file to its original form with a full path; And And providing the converted playlist file to the external device.

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