KR19990041946A - How to Navigate a Track in an Optical Disc Player - Google Patents

Abstract

The present invention relates to a track search method of an optical disk player for searching for a predetermined track on an optical disk, wherein the search key signal for searching for a predetermined track of the optical disk is counted when the search key signal is applied. Stage 1; A second step of calculating a transport distance corresponding to the time counted in the first step; And a third step of searching for the target track spaced apart by the transport distance calculated in the second step, thereby improving the usability of the optical disc player.

Description

How to Navigate a Track in an Optical Disc Player

The present invention relates to a track search method of an optical disc player, and more particularly, to a track search method of an optical disc player configured to automatically set a target track corresponding to a time when a search key is operated.

In general, optical disc players include compact disk players (CDPs), laser disk players (LDPs), compact disk graphic players (CDGPs), and video compact disk players (VCDPs). video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It can record and play back gigabytes (GB) of data including moving images on a 12cm optical disc such as a CD, and it is also designed to be compatible to play current CDs and VCDs.

Such an optical disc player has been developed to record and reproduce image and audio data on a semi-permanent optical disc as audio and video media have developed.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce the signal with sound quality, it does not generate noise due to irregular reproduction and modulation, very low distortion, no ghost and random access, so it is rapidly developed and widely distributed. There is a trend.

On the other hand, the optical disc player provides various functions for the user's convenience. One of the functions provided in the optical disc player, 'browse play', jumps directly from the target track desired by the user in the currently playing track. It is a function that can be performed.

Hereinafter, a process of performing the search / play function provided in a general optical disc player will be described with reference to FIG. 1 as follows.

1 is a block diagram showing a track search apparatus of a general optical disc player.

First, when a search reproduction key signal is generated from the key input unit 10 by a user's key operation while a predetermined operation is performed in the optical disc player, the system controller 20 allows the user to set the target track To. For this purpose, the display unit 40 is controlled to retrieve the predetermined text or image information stored in the storage unit 30 and display the extracted information. In this case, the text or image information drawn from the storage unit 500 may include a message for allowing the user to set a target position and a position indication or number for each track section.

Under the control of the system control unit 20, the display unit 40 processes the text or image information extracted from the storage unit 30 and displays it.

The user sets a target track To to be played back by manipulating a selection key included in the key input unit 10 with reference to the character or image information displayed on the display unit 40. In this case, a plurality of direction keys or numeric keys provided in the key input unit 10 may be used as the selection key.

Subsequently, the system controller 20 controls the pickup transfer unit 50 to transfer the optical pickup unit 60 to the target track To by referring to the intertrack position information stored in the storage unit 30, and the pickup transfer unit ( 50 transfers the optical pickup unit 60 to the target track To under the control of the system controller 20.

Subsequently, the optical disk rotates at a constant linear speed by a spindle motor (not shown), and a focus beam and a tracking servo are performed, and the optical pickup unit 60 receives a laser beam having a predetermined level of laser power from the target track of the optical disk. (To) is irradiated to read the program recorded in the target track To of the optical disc.

However, the searching and reproducing method according to the related art performed by the above-described process not only has the trouble of several key operations for setting the track, but also takes a long time for setting the track.

Accordingly, the present invention has been made in view of the above-described problems, and an object of the present invention is to automatically set a target track corresponding to the time when the navigation key is operated, so that the target track can be searched by one key operation. It relates to a track search method of the configured optical disc player.

In order to achieve the above object, in the present invention, in the track search method of an optical disk player for searching for a predetermined track on an optical disk, when the search key signal for searching for a predetermined track of the optical disk is applied, the search key signal is applied. A first step of counting time to be; A second step of calculating a transport distance corresponding to the time counted in the first step; And a third step of searching for the target track spaced apart by the conveying distance calculated in the second step.

1 is a block diagram showing a track search apparatus of a general optical disc player;

2 is a block diagram of hardware for implementing a track searching method of an optical disc player according to the present invention;

3 is a detailed flowchart illustrating a track searching method of an optical disc player according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10, 100: key input unit 20, 200: system control unit

300: optical disk player 30, 400: storage unit

500: counter 40: display unit

50: pickup transfer unit 60: optical pickup unit

The above and other objects and advantages of the present invention will be more clearly apparent from the following description taken in conjunction with the accompanying drawings.

Hereinafter, a track searching method of an optical disc player according to the present invention will be described with reference to FIGS. 2 and 3.

2 is a block diagram of hardware for implementing a track search method of an optical disc player according to the present invention, and includes a key input unit 100, a system control unit 200, an optical disc player 300, a storage unit 400, and a counter ( 500), and the function of each component is as follows.

First, the key input unit 100 is formed with a plurality of keys including a search key, and generates and provides a key signal corresponding to a user's key operation to the system controller 200. In this case, the search key may be formed separately from the forward direction and the reverse direction.

The system controller 200 controls the overall optical disc player system in response to signals provided by the key input unit 100 and the respective components of the optical disc player 300. In particular, when the search key signal is applied from the key input unit 100. The counter 500 is controlled to count the time that the search key signal is continuously applied.

In addition, the system controller 200 searches the storage unit 400 for information in which the transport distance is compared with the key signal duration, and searches for the transport distance corresponding to the duration of the search key signal provided from the counter 500. Calculates, and determines the target track To out of the optical disc by referring to the calculated transport distance and the direction of the navigation key signal, and if the target track To exceeds the track range of the optical disc, the track range of the optical disc is adjusted. The optical disc player 300 is controlled to search for the last track before skipping. At this time, the final track will be the track located at the outermost circumference of the optical disc when the search direction of the search key signal is forward, and will be the track located at the innermost circumference of the optical disc when the search direction of the search key signal is reverse.

The optical disc player 300 performs the original operation of the optical disc player 300 under the control of the system control unit 200. In particular, the optical disc player 300 searches for and plays back a predetermined target under the control of the system control unit 200. Detects information about the information provided to the system control unit 200.

In the storage unit 400, a transport distance corresponding to the time for which the search key signal lasts may be preset and stored in a table as shown in Table 1. In this case, in the preferred embodiment of the present invention, the transport distance may be set as time or as the number of tracks. In addition, Table 1 is an example for explaining that the transfer distance is preset in response to the duration of the navigation key signal according to the present invention, so that the time interval of the duration of the navigation key signal, the interval of the transportation distance, unit, etc. May be easily changed.

Navigation key signal duration in seconds Feed distance (minutes) One 10 2 20 3 30 4 40 -------- ---------

The counter 500 counts the time duration of the search key signal applied from the key input unit 100 under the control of the system controller 200, and provides the counted time information to the system controller 200.

The track search method of the optical disc player according to the present invention implemented in the hardware including the above-described constituent members will now be described with reference to FIG. 3.

3 is a detailed flowchart illustrating a track searching method of an optical disc player according to the present invention.

First, when a predetermined optical disc is mounted on the optical disc player 300, the system controller 200 controls the optical disc player 300 to load the mounted optical disc, and the optical disc player 300 controls the system control unit 200. The optical disc is loaded under the control of S 10.

When the loading of the optical disc is completed in step S 10, the system controller 200 controls the optical disc player 300 to read the Table of Contents (TOC) information of the mounted optical disc, and the optical disc player 300 controls the system control unit 200. ), The TOC information is read out from the TOC area allocated to the load-in area of the optical disc and provided to the system controller 200. At this time, the TOC information is information stored in the lead-in area of the optical disc at the time of manufacture of the optical disc, and includes the track number for each track of the optical disc, position information about the track start point and the track end point.

The system controller 200 stores the TOC information provided from the optical disc player 300 in an internal memory (not shown) or the storage 400 provided in the system controller 200 itself (S 20).

Subsequently, when the user manipulates the play key provided in the key input unit 100, the key input unit 100 generates a key signal in response to the user's key operation, and then provides the generated play key signal to the system controller 200. (S 30)

The system control unit 200 receiving the play key signal from the key input unit 100 controls the optical disc player 300 so that the optical disc player 300 performs a playback operation, and the optical disc player 300 controls the system of the system control unit 200. By control, the program recorded on the optical disc is read out. In addition, the optical disc player 300 detects a track position on the optical disc currently being reproduced, and provides the system controller 200 with information about the detected current reproduction position (S40).

When the search key signal is applied from the key input unit 100 during the process of step S40 (S50), the system controller 200 controls the counter 500 to count the time for which the search key signal is applied. At this time, in the preferred embodiment of the present invention, the direction may be added to the search key signal, and may be a forward search key signal or a reverse search key signal.

The counter 500 counts the duration of the search key signal applied from the key input unit 100 under the control of the system controller 200, and provides the counted time information to the system controller 200. (S 60)

During the above-described steps S50 and S60, if the search key signal applied from the key input unit 100 is stopped, the system controller 200 controls the counter 500 to stop the counting.

The counter 500 stops counting the duration of the search key signal under the control of the system controller 200 (S80).

Subsequently, the system controller 200 searches for information in which the transport distance is compared to the duration of the search key signal stored and preset in the storage unit 400, and searches for the time information provided from the counter 500 in step S 60. Calculate the corresponding feed distance (S 90).

After completing step S90, the system controller 200 determines whether the search key signal applied from the key input unit 100 is the forward search key signal in step S50 (S100). It is determined whether the target track at a position spaced forward in the forward direction is out of the optical disk range by the calculated transport distance (S 110). That is, the target track corresponding to the search direction and the transport distance detected in the above-described process is read out of the optical disk. It is determined whether it is out of the out area.

As a result of the determination in step S 110, if the target track To does not leave the lead-out area of the optical disc, the system controller 200 will control the optical disc player 300 to search for the target track To of the optical disc, and the optical disc player The control unit 300 searches for the target track To under the control of the system control unit 200. (120)

On the other hand, if it is determined in step S 110 that the calculated target track To is out of the lead-out area of the optical disc, the system controller 200 moves the target track To to the innermost circumference of the optical disc (for example, the lead-out area). After modification to the track located at (S 130), the optical disc player 300 will be controlled to search for the modified target track (To), and the optical disc player 300 is controlled by the system control unit 200. (To) (S 120)

As a result of the determination in step S 100, if the key signal applied from the key input unit 100 in step S 50 is not the forward direction but the reverse search key signal, the system control unit 200 reverses the transfer distance calculated in step S 90 in the reverse direction. It is determined whether the target track To at a spaced position is out of the optical disk range (S 140). That is, the target track To corresponding to the search direction and the transfer distance detected in the above-described process is lead-in of the optical disk. Determine if you are out of range.

As a result of the determination in step S 140, if the target track To does not leave the lead-in area of the optical disc, the system controller 200 will control the optical disc player 300 to search for the target track To of the optical disc, and the optical disc player The control unit 300 searches for the target track To under the control of the system controller 200 (S 160).

On the other hand, if it is determined in step S 140 that the calculated target track To is outside the lead-out area of the optical disc, the system controller 200 moves the target track To to the innermost circumference of the optical disc (for example, the lead-out area). After the modification to the track located at (S 150), the optical disc player 300 will be controlled to search for the modified target track (To), and the optical disc player 300 is controlled by the system controller 200. (To) (S 160)

Subsequently, when the search for the target track To is completed in steps S 120 and S 160, the system controller 200 controls the optical disc player 300 to perform playback from the target track where the search is completed, and the optical disc player ( 300 reproduces from the program recorded in the target track To under the control of the system controller 200 (S 170).

According to the present invention described above, it is possible to search for a desired target track by one key operation, thereby improving the usability of the optical disc player.

Claims (3)

A track searching method of an optical disk player for searching for a predetermined track on an optical disk, A first step of counting a time when the search key signal is applied when a search key signal for searching for a predetermined track of the optical disc is applied; A second step of calculating a transport distance corresponding to the time counted in the first step; And a third step of searching for the target track spaced apart by the conveying distance calculated in the second step. The method of claim 1, wherein the third step, Searching for a target track spaced apart by the transport distance calculated in the second step, the target track corresponding to the search direction of the search key signal, the track search method of the optical disc player. 3. The track search method according to claim 1 or 2, wherein when the target track is out of a predetermined range of the optical disc, the last track immediately before leaving the optical disc is searched.