KR20030000690A - Method for fast searching of an optical recording medium - Google Patents

Abstract

PURPOSE: A high speed searching method for optical recorder/reader is provided to enable users to promptly search a song from an MP3 CD that stores more than one hundred and seventy songs. CONSTITUTION: A high speed searching method for optical recorder/reader includes the steps of inputting a search key such as an REW button or an FF button(S100), judging whether the search key is pushed for half second(S110), skipping a song if the duration time of pushing the search key is less than half second(S160), judging whether the search key is pushed for one second(S120), skipping several songs as many as set skip amount if the duration time of pushing the search key is less than one second(S170), entering a skip amount setting mode(S130), setting up skip amount by pushing the search key(S140), and terminating the skip amount setting mode if a user pushes a stop key(S150).

Description

Method for fast searching of an optical recording medium {Method for fast searching of an optical recording medium}

The present invention relates to a method for searching audio data of a player for reproducing audio data stored in an optical recording medium such as a CD-ROM or a CD-RW. More specifically, the present invention relates to audio data stored in a high density optical recording medium such as an MPEG3 CD. To search at high speed.

MPEG (moving picture experts group) Audio Layer-3 (hereinafter referred to as MP3) is a technology for compressing digital audio data. Compression from a wave file to an MP3 file has almost no loss of sound quality. The capacity can be compressed with. For example, if a wave file stored on a compact disc (CD) is made into a computer voice file, it takes about 50MB per song.However, using MP3 technology, the quality of a 50MB WAVE file can be reduced. It can be compressed to 4.5MB.

MP3 Player (MP3 Player) is a next-generation digital audio device that can play computer music files MP3. The MP3 player plays back the contents stored in its built-in 16MB flash memory without the need for tapes, so you can listen to CD-level music regardless of severe shaking and edit your music files to your liking. However, due to the high price of 16MB flash memory embedded in MP3 players, the market was limited.

Recently, an MP3 CD player, which combines the functions of an existing CD player and an MP3 player, has been developed and marketed. An MP3 CD can store more than 170 MP3 files on one disc. This MP3 CD player has the advantage of not only playing normal audio CDs but also playing media such as CD-R and CR-RW, which store MP3 files.

In general, MP3 CD players have keys that allow the user to select between STOP, rewind, fast find, and PLAY / PAUSE. . In particular, the reverse key REW is a key for selecting the stored song N-1 before the song N currently being played, and the forward search key FF is a song N stored after the song currently being played. Key to select +1).

For example, if the user is listening to the 63rd song stored on the CD and wants to listen to the 62nd song again, the user presses the reverse search key (REW) once. If the user wants to listen to the 60th song, the reverse search key ( REW) three times. On the other hand, if the user is listening to the 63rd song stored on the CD and wants to listen to the 64th stored location, the user presses the forward search key once. If the user wants to listen to the 68th stored song, the forward search key is pressed. Press (FF) five times.

However, in order for the user to listen to the 63rd song stored on the CD and to listen to the 145th stored song, the user must press 82 times the forward search key FF.

Since a CD storing general audio data stores 10 to 18 songs, there is no inconvenience for a user to find a desired song by using the forward search key or the backward search key. However, it is very cumbersome to find a user's desired song on an MP3 CD stored over 170 songs by using the forward search key FF or the backward search key REW.

Accordingly, an object of the present invention has been proposed to solve the above problems, and to provide a method for rapidly searching audio data stored in an optical recording medium such as an MP3 CD.

1 is a diagram showing the configuration of an MP3 CD player in which a fast searching method is performed according to a preferred embodiment of the present invention;

FIG. 2 is a diagram illustrating function keys configured in a key input unit illustrated in FIG. 1.

3 exemplarily illustrates a screen displayed on a display unit in a skip amount setting mode; And

4 is a flowchart showing a control procedure of a fast searching method according to a preferred embodiment of the present invention carried out in the CD player shown in FIG.

※ Explanation of code for main part of drawing

10: MP3 CD player 11: MP3 CD

12: optical pickup 13: playback unit

14 control unit 15 key input unit

16: DSP17: DAC

18 display unit 21 spindle motor

22: sled motor

A method of searching for a song to be reproduced in an apparatus for reproducing a plurality of songs stored in an optical recording medium of the present invention for achieving the above object comprises the steps of: pressing a search key; Determining whether the state in which the search key is pressed corresponds to a fast search mode; And if the determination result is a fast search mode, searching for a song to be reproduced while skipping in a plurality of preset music units.

Hereinafter, a high speed search method of an optical record carrier according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating a configuration of an MP3 CD player in which a fast searching method is performed according to an exemplary embodiment of the present invention. Referring to FIG. 1, the MP3 CD player 10 includes: an optical pickup 12 for reading data recorded on the MP3 CD 11; A reproducing unit (13) for reproducing and outputting the read data; A digital signal processor (DSP) 19 for converting data output from the reproduction unit 13 into reproduction data; A controller 15 for controlling the operation of the constituent means in accordance with a key input input from a key input unit 15; A display unit 18 for displaying an operation state of the CD player 10 to a user under control of the controller 15; A sled motor 21 for horizontally moving the optical pickup 12; And a spindle motor 22 for rotating the MP3 CD 11 according to a control signal output from the controller 14.

FIG. 2 is a diagram illustrating function keys configured in the key input unit 15 illustrated in FIG. 1. Referring to FIG. 2, the key input unit 15 is a stop key STOP, a backward seek key REW, a forward seek key FF, and a play / pause key PLAY, as is well known to those skilled in the art. / PAUSE) and the like. The backward search key (REW) or the forward searcher (FF) of the conventional CD player was used as a key for searching for the (N-1) th or (N + 1) th song when the Nth song is currently being played. Is used as a key for skipping not only the (N-1) th or (N + 1) th songs but also a preset number of songs, and further, a key for setting the number of skip songs. Such a fast searching method will be described in detail with reference to FIG. 4.

4 is a flowchart showing a control procedure of a fast searching method according to a preferred embodiment of the present invention carried out in the CD player shown in FIG.

In step S100, when the user releases the backward search key REW or the forward search key FF provided in the key input unit 15, the controller 14 determines the duration of the search key being pressed at that time. And control corresponding to the determined duration. First, the control unit 14 determines whether the duration of the search key is pressed is 0.5 seconds or more. As a result of the determination, if the duration for which the search key is pressed is less than 0.5 second, the control proceeds to step S160 to perform a normal search mode. In step S160, the controller 14 controls the spindle motor 21 and the sled motor 22 to advance or reverse the position of the optical pickup 12 by one song from the current position. For example, if the reverse search key REW is pressed for less than 0.5 seconds while the 63th song stored in the CD 11 is being played, the optical pickup 12 moves to the 62th song stored in the CD 11. If the forward search key FF is pressed for less than 0.5 second, the optical pickup 12 is moved to the 64th tune stored in the CD 11.

As a result of the determination in step S110, if the duration of the search key is pressed is 0.5 seconds or more, then the control proceeds to step S120. In step S120, it is determined whether the duration for which the search key is pressed is longer than 1 second. As a result of the determination, if the duration for which the search key is pressed is less than 1 second, the control proceeds to step S170 to perform the fast search mode. In step S170, the controller 14 controls the spindle motor 21 and the sled motor 22 to advance or backward the position of the optical pickup by a predetermined skip amount from the current position. For example, if the backward search key REW is pressed for more than 0.5 seconds but less than 1 second while the track stored in the 63rd of the CD 11 is being played while the skip amount in the fast search mode is set to 10, the optical pickup 12 Is moved to the 53th song stored in the CD 11, and the optical pickup 12 is moved to the 73th song stored in the CD 11 when the forward search key FF is pressed for 0.5 seconds or more and less than 1 second. In this manner, the preset skip amount may be set by the user in the skip amount setting mode to be described later, but the CD player manufacturer may define a default value in advance for the convenience of the user.

As a result of the determination in step S120, if the duration of the search key is pressed is 1 second or more, the flow proceeds to step S130 to enter a skip amount setting mode. In the skip amount setting mode, the controller 14 controls the display unit 18 to display a screen as shown in FIG. 3. 3 is a diagram illustrating an example of a screen displayed on the display unit 18 in the skip amount setting mode. The currently set skip amount is 10 songs, and when the backward search key REW is pressed, the skip amount may be reduced, and the forward amount may be reduced. It indicates that the skip amount can be increased by pressing the search key FF, and that the skip amount setting mode can be exited by pressing the stop key STOP.

In step S140, the user sets the skip amount by pressing the forward searcher FF or the backward search key REW. In the skip amount setting mode, the skip amount that is increased or decreased when the user presses the forward search key or the backward search key may be variously set for each CD player manufacturer, for example, 5, 10, or 20. That is, if the skip amount increased or decreased each time the user presses the forward search key FF or the backward search key REW once is set to 10, the skip amount is set to 30 when the user presses the reverse search key REW three times.

When the user presses the stop key STOP in the skip amount setting mode, the controller 14 sets the currently displayed skip amount to the skip amount in the fast search mode of the CD player 10 and ends the skip amount setting mode (step S150).

Table 1 below summarizes the operation modes of the audio device according to the time when the forward navigation key or the backward navigation key is pressed.

Navigation key press time Operation mode Perform actions Less than 0.5 seconds Normal seek mode Skip one song 0.5 seconds or more but less than 1 second Fast seek mode Skip search by the set skip amount 1 second or more Skip amount setting mode Skip amount setting

For example, if the skip amount set by the method described above is '10' and the track stored in the 63rd is being played, the backward search key REW is pressed for 0.5 to 1 second, the optical pickup 12 If the forward search key FF is pressed for 0.5 to 1 second, the optical pickup 12 is moved to the 73th song stored in the CD 11. If the user wants to listen to the 145th song while the 63th song is being played, press and hold the forward search key (FF) for 8 times (i.e., between 0.5 seconds and 1 second). Then, press the forward search key FF briefly (that is, for a time of 0.5 seconds or less) and perform the operation twice. Conventionally, in order to move from the 63rd song to the 145th song, the forward search key FF has to be pressed 82 times. However, according to the fast search method according to the present invention, the forward search key FF is pressed all 10 times.

If the total number of songs stored on the CD 11 is 170, and the song stored at the 133th time is currently being played, the forward search key FF is pressed four times in succession for 0.5 to 1 second, the optical pickup 12 Since there is no song 173, it is moved to the third song. As such, in the fast search mode, if the position to be skipped exceeds the position of the last song, the skip is circulated to the first song, and if the skipped position exceeds the position of the first song, the cycle is skipped to the last song. Calculate the amount.

In addition, the present invention has the advantage of minimizing the cost added to produce a CD player according to the present invention because it does not need to provide a separate key for the high-speed search and skip amount setting, in particular, portable CD player which is a trend of miniaturization, lightweight The benefits for this may be even greater.

On the other hand, in the present invention, the normal search mode (for example, less than 0.5 seconds) and the fast search mode (for example, 0.5 seconds or more and 1 second) are checked by checking the time for pressing the forward search key FF and the backward search key REW. Below), and a skip amount setting mode (for example, 1 second or more), but various modifications may be made. For example, if you press the Forward Search Key (FF) or the Reverse Search Key (REW) shortly once, the normal search mode is pressed, the same search key is pressed twice in succession, and the same search key is pressed three times in succession, the skip amount setting mode is pressed. Can be designed to determine. In addition, a CD player including various functions may further include a selection key for setting operating conditions of such functions. In this case, the selection key may be assigned as a key for entering a skip amount setting mode.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The method of searching for a plurality of songs stored in the optical recording medium according to the present invention, which is constructed and constructed as described above, can be performed by skipping not only one song but also a plurality of songs by using the forward search key or the backward search key. have. Therefore, it is a very useful invention that allows a user to quickly search for a desired song in an easy way on an MP3 CD stored more than 170 songs.

Claims (6)

A method for searching for a song to be reproduced in an apparatus for reproducing a plurality of songs stored on an optical recording medium: Pressing a search key; Determining whether the state in which the search key is pressed corresponds to a fast search mode; And And if the determination result is the fast search mode, skipping a plurality of preset songs and reproducing the songs of the positions thereof. The method of claim 1, The fast search mode determination step, And searching for the fast search mode when the search key is pressed for a predetermined time or longer. The method of claim 1, The fast search mode determination step, And searching for the fast search mode when the search key is pressed twice in succession. The method of claim 1, Determining whether a state in which the search key is pressed corresponds to a skip amount setting mode if the search result is not the fast search mode; If the determination result is a skip amount setting mode, entering a skip amount setting mode; And And a step of setting the skip amount by a user. The method of claim 4, wherein The skip amount setting step, And setting the skip amount by increasing and decreasing the skip amount by using the search key. The method of claim 1, And a plurality of preset songs are skipped in the fast search mode, and if the skipped position exceeds the position of the last song, the first track is cyclically skipped.