KR100728497B1 - Method of searching id3 tag for disc player supporting mp3 format and computer-readable medium having thereon program performing function embodying the same - Google Patents

Abstract

A method for searching an ID3 tag in an MP3(MPEG(Moving Picture Experts Group) layer 3) reproducible disc player and a recording medium capable of being read by a computer recording a program for embodying the same are provided to prevent the delay of time required for searching the ID3 tag when it is moved to the next music in case that a plurality of MP3 files are played in the MP3 reproducible disc player by searching the ID3 tag when a certain part of audio data is accumulated in a buffer after the play of the audio data of the MP3 file is started without primarily searching the ID3 tag when reading the MP3 file. A pickup is moved to a head position of an MP3 file(S210). Audio data of the MP3 file are read and buffered(S220). The buffered audio data are played(S230). When a quantity of audio data which are not reproduced is greater than a threshold value, the buffering is stopped(S240). The pickup is moved to the head position of the MP3 file, and it is confirmed whether an ID3v2 tag exists(S250). If the ID3v2 tag exists in the head position, the ID3v2 tag is read and stored(S255). If the ID3v2 tag does not exist, the pickup is moved to the last position of the MP3 file and it is confirmed whether an ID3v1 or ID3v1.1 tag exists(S260). If the ID3v1 or ID3v1.1 tag exists in the last position, the ID3v1 or ID3v1.1 tag is read and stored(S265). The stopped buffering is performed again(S270).

Description

FIELD OF SEARCHING ID3 TAG FOR DISC PLAYER SUPPORTING MP3 FORMAT AND COMPUTER-READABLE MEDIUM HAVING THEREON PROGRAM PERFORMING FUNCTION EMBODYING THE SAME }

1 is a flowchart of an ID3 tag searching method in a MP3 playable disc player according to the prior art.

2 is a flowchart of an ID3 tag searching method in an MP3 playable disc player according to the present invention;

The present invention relates to a method of searching for an ID3 tag in an MP3 playable disc player and a computer readable recording medium having recorded thereon a program for realizing the same. More particularly, the present invention relates to a method of searching for an ID3 tag in an MP3 playable disc player. If you start playback of the audio data portion of an MP3 file without first searching it, and then configure to search for ID3 tags when audio data accumulates in a buffer part of the MP3 file, especially when playing MP3 files on an MP3 playable disc player, A method of searching for ID3 tags in an MP3 playable disc player that can prevent time lag for searching for ID3 tags when moving to the next song during playback, and a computer-readable recording medium recording a program for realizing the same. will be.

The most widely used standard or medium for storing audio data is CD-DA (CD-Digital Audio). The CD-DA can store an audio signal of about 74 minutes in the case of a disc having a diameter of 12 cm, for example.

On the other hand, recently introduced audio data compression technologies such as MPEG-1 Audio Layer-III (MP3) and Windows Media Audio (WMA) can compress the capacity of audio data by CD-DA to about one tenth, for example. In addition, the sound quality is not deteriorated. The music recording time is limited to about 74 minutes for one disc in the case of uncompressed audio data by CD-DA, whereas 700 minutes or more can be recorded in one disc in case of compressed audio data.

The above-mentioned CD-DA format audio file and the compressed audio format MP3 file have different formats, but all have the commonality as audio files, and thus can play both CD-DA and MP3 files as one audio playback device. Was developed. For example, an MP3 CD player or a DVD player that is currently commercially available may be mentioned.

Hereinafter, in the present invention, a reproducing apparatus capable of reproducing a disc type reproducing medium such as an MP3 CD reproducing apparatus or a DVD reproducing apparatus and simultaneously reproducing a file in an MP3 format is referred to as an "MP3 reproducible disc player".

1 is a flowchart of an ID3 tag searching method in an MP3 playable disc player according to the prior art.

First, in the MP3 playable disc player, the disc reading position is moved to the MP3 file corresponding to one song (S110).

When moving to the MP3 file corresponding to the next song, the ID3 tag of the corresponding MP3 file is searched first (S120).

The ID3 tag is information stored in the MP3 file and stores additional information of the MP3 file. ID3 tags have the format of version 1 (ID3v1) or version 2 (ID3v2).

First of all, ID3v1 is recorded in the last 256 bytes of the MP3 file in the form of 30 bytes of song title and 30 bytes of artist information. The tag information that can be stored in the ID3v1 is limited in advance to the title, artist, album, production year, etc., and the length of each tag is also limited. In addition, version 1.1 (ID3v1.1) adds track information to such information, but basically the configuration is the same as that of ID3v1.

The ID3v2 standard has been introduced in order to improve the disadvantage that the limitation of ID3v1, for example, the length of additional information such as a song title or a singer, is limited, and information that can be recorded with a tag is also limited. ID3v2 is set so that the additional information of the MP3 file can be infinitely recorded in units of frames. For example, as a title is written in the title frame of ID3v2 and the album name is recorded in the album name frame, ID3v2 can theoretically have infinite frames, and new frames can be arbitrarily defined and recorded as necessary.

In addition, ID3v2 may include binary data such as an album jacket or a singer's image, and may also include lyrics information, and thus its use is spreading.

In the search for the ID3 tag, it is first checked whether the ID3 tag exists in the front of the file (S130). In other words, version 2, the ID3v2 tag, is located at the beginning of the file, so it is checked to see if the ID3v2 tag is present at the beginning of the file.

 In this case, if the ID3v2 tag exists, it is read (S135), and playback of the MP3 file is started (S140).

If the ID3 tag does not exist in the front of the file in step S130, it moves to the last part of the file and checks whether the ID3 tag is located (S150). In other words, version 1, or version 1.1, that is, ID3v1 or ID3v1.1 tags are located at the end of the file, so it is checked whether an ID3v1 or ID3v1.1 tag exists at the end of the file.

In this case, if an ID3v1 or ID3v1.1 tag exists, it is read (S155) and then moved back to the beginning of the file (S160).

After that, MP3 file playback is started (S140).

The ID3 tag search method in the MP3 playable disc player according to the related art has a disadvantage in that the start time of the MP3 file is delayed to search for the ID3 tag. In particular, in an MP3 reproducible disc player having a configuration that reads digital information recorded on a recording medium such as a CD or a DVD through an optical pickup, rather than a configuration capable of quickly reading file information from a flash memory or the like, recording on a recording medium. Since the pickup position must be moved to read the file information, a time delay occurs to read the ID3 tag information.

In particular, if it contains ID3v1 or ID3v1.1, to read ID3v1 or ID3v1.1, move the disc reading position to the end of the MP3 file to read the ID3v1 or ID3v1.1 tag and read the disc back to the beginning of the MP3 file. Since the MP3 audio data is reproduced by moving the position, the time taken to start the reproduction increases in response to the increase in the optical pickup movement and the setting time.

An object of the present invention is to configure an MP3 playable disc player to search for an ID3 tag when starting to play an audio data portion of the MP3 file without first searching for an ID3 tag when the MP3 file is read, and then retrieving the ID3 tag when audio data is accumulated in a buffer. This makes it possible to play MP3 files on an MP3 playable disc player, especially when playing multiple MP3 files, and to avoid delays in retrieving ID3 tags when moving to the next song. To provide a way to search for tags.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for realizing a method of searching for an ID3 tag in the MP3 playable disc player.

In order to achieve the above technical problem, the present invention provides a method of searching for an ID3 tag in an MP3 playable disc player, comprising the steps of: (a) moving the pickup to the head of the MP3 file; and (b) audio data of the MP3 file. Reading and buffering, (c) reproducing the buffered audio data, and (d) the amount of audio data buffered in step (b) and not yet played back in step (c) above a threshold value. Stop buffering; (e) moving to a head position of the MP3 file to check whether an ID3v2 tag exists; and (f) reading the ID3v2 tag if the ID3v2 tag exists at the head position. Storing as a tag; (g) moving to the last position of the MP3 file if the ID3 tag does not exist and checking whether an ID3v1 or ID3v1.1 tag exists; and (h) If the ID3v1 or ID3v1.1 tag is present at the last position, reading the ID3v1 or ID3v1.1 tag and storing the ID3v1 or ID3v1.1 tag, and (i) the ID3v2 tag or the at step (f) or (h). A method of searching for an ID3 tag in an MP3 playable disc player, the method comprising: performing buffering interrupted in the step (d) after storing the ID3v1 or the ID3v1.1 tag.

In the method of searching for an ID3 tag in an MP3 playable disc player according to the present invention, the amount of the threshold value or more is preferably an amount of 8 seconds or more when the audio data stored in the buffer is played in the MP3 playable disc player. Do.

In the method of searching for an ID3 tag in an MP3 playable disc player according to the present invention, (j) the ID3v2 tag or the ID3v1 or the ID3v1.1 tag stored through the step (f) or the step (h) may be stored. It is preferable to further include displaying on the display unit of the MP3 playable disc player.

The present invention also provides a computer-readable recording medium recording a program for realizing an ID3 tag searching method in an MP3 playable disc player, comprising: (A) a function of moving a pickup to a head position of an MP3 file; A function of reading and buffering audio data of an MP3 file, (C) reproducing the buffered audio data, (D) audio buffered in function (B) and not yet played back in function (C) A function of stopping buffering when the data is greater than or equal to a threshold value, (E) moving to a head position of the MP3 file and checking whether an ID3v2 tag exists; and (F) the ID3v2 tag is present at the head position. Reads the ID3v2 tag and stores it as the ID3v2 tag; and (G) if the ID3 tag does not exist, moves to the last position of the MP3 file and sends the ID3v1 or ID3v1.1 tag. (H) reading and storing the ID3v1 or ID3v1.1 tag if the ID3v1 or ID3v1.1 tag exists in the last position, and storing the ID3v1 or ID3v1.1 tag if the ID3v1 or ID3v1.1 tag exists, and (I) the function (F) or A computer-readable recording medium having recorded thereon a program for realizing the function of performing the buffering interrupted in the function (D) after storing the ID3v2 tag or the ID3v1 or the ID3v1.1 tag in the function (H). to provide.

Hereinafter, the method of searching for ID3 tags in the MP3 playable disc player of the present invention and the computer-readable recording medium recording a program for realizing the same will be described in more detail step by step with reference to the accompanying drawings.

2 is a flowchart of an ID3 tag searching method in an MP3 playable disc player according to the present invention.

As shown in the figure, the pickup is first moved to the head position of the MP3 file to be reproduced (S210).

In other words, in the case of a CD or DVD disc player, it moves to that location to read the data recorded on the CD or DVD disc. In this case, the MP3 file is recorded on the CD or DVD disc. do.

Thereafter, audio data is read and buffered from the MP3 file corresponding to the moved position (S220).

The ID3 tag searching method in the MP3 playable disc player according to the prior art first starts from reading the ID3 tag, but in the present invention, there is a difference in that audio data is read and buffered first.

Thereafter, the buffered audio data is reproduced in step S220 (S230).

Thereafter, it is checked whether the data buffered through step S220 but not yet reproduced through step S230 is equal to or greater than a threshold value (S235).

For example, the amount above the threshold is an example in which audio data that is buffered and not yet played back can be played for 8 seconds or more when played in an MP3 playable disc player. That is, if the ID3 tag search takes up to 7 seconds, the playback is performed using the buffered audio data at the ID3 tag search time.

If the amount is greater than or equal to the threshold value, buffering is stopped (S240). If the amount is less than or equal to the threshold value, buffering is continued through step S220.

If buffering is stopped through the step S240, the mobile station moves to the head of the MP3 file and checks whether an ID3v2 tag exists (S250).

If an ID3v2 tag exists at the head position of the MP3 file in step S250, it is read and stored as an ID3v2 tag (S255).

If the ID3v2 tag does not exist at the head position of the MP3 file in step S250, it moves to the last position of the MP3 file and checks whether an ID3v1 or ID3v1.1 tag exists (S260).

If the ID3v1 or ID3v1.1 tag exists at the last position of the MP3 file in step S260, it is read and stored as an ID3v1 or ID3v1.1 tag (S265). If the ID3v1 or ID3v1.1 tag does not exist at the last position of the MP3 file in step S260, the search for the ID3 tag ends.

When the ID3v2 tag or the ID3v1 or ID3v1.1 tag is stored through this process, the buffering interrupted in step S240 is performed again (S270), so that the playback is normally performed.

When the ID3 tag is searched through this step, the MP3 file can be played without time delay.

In another aspect, the present invention may further comprise the step of displaying the ID3v2 tag or ID3v1 or ID3v1.1 tag stored on the display unit of the MP3 playable disc player according to the present invention. .

That is, since the ID3v2 tag or ID3v1 or ID3v1.1 tag includes various information such as song name, singer and lyrics information, the ID3v2 tag or ID3v1.1 tag is displayed on the display unit of the MP3 playable disc player so that the user can confirm the information.

The present invention also provides a computer-readable recording medium having recorded thereon a program for realizing a method of searching for an ID3 tag in an MP3 playable disc player according to the present invention.

However, since the detailed description of the computer-readable recording medium according to the present invention overlaps the ID3 tag searching method in the MP3 playable disc player according to the present invention described with reference to FIG. 2, the detailed description thereof will be omitted.

Although the present invention has been described in detail, this is for illustrative purposes only, and the protection scope of the present invention is not limited thereto, and the protection scope of the present invention is defined through the description of the claims.

As described above, according to the present invention, when the MP3 playable disc player reads the ID3 tag without first reading the ID3 tag, the audio data is accumulated in the buffer after starting the playback of the audio data portion of the MP3 file. By retrieving the MP3 file, it is possible to prevent the time delay for searching the ID3 tag when moving to the next song, especially when playing an MP3 file in an MP3 playable disc player.

Claims (6)

A method of searching for ID3 tags in an MP3 playable disc player, (a) moving the pickup to the beginning of the MP3 file; (b) reading and buffering audio data of the MP3 file; (c) playing the buffered audio data; (d) stopping buffering if the audio data buffered in step (b) and not yet played back in step (c) is more than a threshold; (e) moving to the head of the MP3 file and checking whether an ID3v2 tag exists; (f) reading the ID3v2 tag if the ID3v2 tag exists at the head position and storing the ID3v2 tag as the ID3v2 tag; (g) if the ID3 tag does not exist, moving to the last position of the MP3 file and checking whether an ID3v1 or ID3v1.1 tag exists; (h) reading the ID3v1 or ID3v1.1 tag if the ID3v1 or ID3v1.1 tag exists in the last position and storing the ID3v1 or ID3v1.1 tag; (i) performing the buffering interrupted in the step (d) after storing the ID3v2 tag or the ID3v1 or the ID3v1.1 tag in the step (f) or the step (h). ID3 tag search method in the MP3 playable disc player comprising a. The method of claim 1, The amount of the threshold value or more is the amount of audio data stored in the buffer can play more than 8 seconds when playing in the MP3 playable disc player ID3 tag search method in an MP3 playable disc player. The method of claim 1, (j) displaying the ID3v2 tag or the ID3v1 or the ID3v1.1 tag stored through the step (f) or (h) on the display unit of the MP3 playable disc player. ID3 tag searching method in the MP3 playable disc player further comprising. A computer-readable recording medium having recorded thereon a program for realizing an ID3 tag searching method in an MP3 playable disc player, (A) the ability to move the pickup to the beginning of the MP3 file, (B) reading and buffering audio data of the MP3 file; (C) playing the buffered audio data; (D) a function of stopping buffering when the audio data buffered in the function (B) and not yet played in the function (C) is more than a threshold value; (E) a function of checking whether an ID3v2 tag exists by moving to the head of the MP3 file; (F) a function of reading and storing the ID3v2 tag when the ID3v2 tag exists in the head position, (G) if the ID3 tag does not exist, moves to the last position of the MP3 file and checks whether an ID3v1 or ID3v1.1 tag exists; (H) a function of reading the ID3v1 or ID3v1.1 tag when the ID3v1 or ID3v1.1 tag exists in the last position and storing the ID3v1 or ID3v1.1 tag; (I) a function of performing the buffering interrupted in the function (D) again after storing the ID3v2 tag or the ID3v1 or the ID3v1.1 tag in the function (F) or the function (H). A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 4, wherein And the amount of the threshold value or more is an amount of audio data stored in the buffer that can be played for 8 seconds or more when played in the MP3 playable disc player. The method of claim 4, wherein (J) A function of displaying the ID3v2 tag or the ID3v1 or the ID3v1.1 tag stored through the function (F) or the function (H) on the display of the MP3 playable disc player. Computer-readable recording medium further comprising.

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