KR101014631B1 - Method for searching track on the disk player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track retrieval method in an optical disc reproducing apparatus, and more particularly to storing TOC information of an optical disc, and displaying menu information in TOC information when a menu key signal is input during reproduction of data recorded on the optical disc. Determining whether the preset PBC function is on or off when a track number key signal for track search is input; and inputting a track number when the preset PBC function is on. And storing the preset previous PBC function state, and setting the current PBC function to the off state and retrieving and displaying information of the track number input from the optical disc. Therefore, the present invention can overcome the limitation that the track search cannot be performed in the playback state where the PBC function is performed by allowing the track search even when the PBC function is on when the optical disc having the PBC function is played back.

Optical disc player, PBC function, track TOC, track number

Description

Track search method in optical disc player {METHOD FOR SEARCHING TRACK ON THE DISK PLAYER}

1 is a block diagram showing an optical disk reproducing apparatus to which a track search method according to the present invention is applied;

2 is a flowchart showing a track search method in the optical disk reproducing apparatus according to the present invention;

3 is a view showing a menu screen displayed on a display screen while performing a PBC function in an optical disk player according to the present invention;

Description of the Related Art

10: optical disc 12: optical pickup unit

14: RF amplification unit / error correction unit 16: Servo unit

18: microcomputer 20: key input unit

22: memory 24: CD-ROM decoder

26: MPEG Audio Decoder 28: MPEG Video Decoder

TECHNICAL FIELD The present invention relates to an optical disc reproducing technique, and more particularly, to a track retrieval method in an optical disc reproducing apparatus.

In order to play CDs (Compact Disk) and VCD (Video Compact Disk) in a single device, a compatible compound optical disk playback device is widely used. Unlike DVD (Digital Video Disk), VCD is divided into version 1.0, version 2.0, and SVCD. Unlike VCD 1.0, VCD 2.0 and SVCD add PBC (PlayBack Control) function during playback.

In general, the PBC function provided in VCD 2.0 and SVCD allows a user to select a program to be played through a menu-played screen. An optical disc proposed to perform such a PBC function is basically divided into a lead-in area, a data area, and a lead-out area, and stores information for performing the above-described PBC function in the first track of the data area.

In particular, the first track is divided into a primary volume descriptor (PVD) area, a basic information area, a VCD information area, a SPI (Segment Play Item) area, and a CDI (CD Interactive) area to store corresponding information. Among these areas, menu information necessary for performing the above-described PBC function (e.g. still images introducing menu contents, slice screens and demo-dimensional slice screens and video screens) are stored in the SPI area. The address information for is stored in an unshown PSD (Play Sequence Descriptor) area in the above-mentioned area. In the VCD 2.0 and the SVCD, since the menu is executed by the subscriber from the menu output by using the PBC function, it is possible to start from the middle track of the disc.

On the other hand, in the optical disc reproducing apparatus, a function of turning on / off the PBC function is added, and when the PBC function is turned off, the SPI area is skipped so as not to perform the PBC function like VCD 1.0.

However, there is a disadvantage in that the track search cannot be performed in the playback state in which the PBC function is being performed. To perform the track search, the PBC function must be set to off before reading the disc's TOC (Table Of Content) information again. There was a problem to come and play from the beginning.

SUMMARY OF THE INVENTION An object of the present invention is to perform track search in a playback state in which a PBC function is performed by performing track search even when the PBC function is on when playing an optical disk having a PBC function to solve the above problems of the prior art. SUMMARY OF THE INVENTION An object of the present invention is to provide a track search method in an optical disc reproducing apparatus that can overcome the limitation that it cannot be performed.

In order to achieve the above object, the present invention provides a method for searching a track of an optical disc, the method comprising: storing TOC information of an optical disc when the optical disc is a PBC (PlayBack Control) function, and reproducing data recorded on the optical disc. Displaying menu information in the TOC information when a menu key signal is input in the middle, and determining whether the preset PBC function is on or off when a track number key signal for track search is input. Storing the track number entered when the preset PBC function is on and the previous preset PBC function status; setting the current PBC function off and saving the information of the track number input from the optical disc. Searching and displaying it.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing an optical disk reproducing apparatus to which a track search method according to the present invention is applied. Referring to FIG. 1, an optical disc reproducing apparatus to which the present invention is applied includes an optical disc 10, an optical pickup unit 12, an RF amplification / error correcting unit 14, a servo unit 16, a microcomputer 18, a key input unit ( 20, memory 22, CD-ROM decoder 24, MPEG audio decoder 26, MPEG video decoder 28, CD-G decoder 30, OSD block 32, audio signal processor 34 And a video signal processor 36 or the like.

The optical pickup unit 12 optically picks up the signal recorded on the optical disc 10, converts the signal into an electrical signal, and transfers the signal to the RF amplification / error storage unit 14. The RF amplification / error correction unit 14 extracts an RF signal from the signal detected by the optical pickup unit 12 and performs EFM (Eight Fourteen Demodulation) demodulation and error correction.

The servo unit 16 controls a drive unit (not shown) for driving the spindle motor of the optical disc 10 and the sled motor of the optical pickup unit 12. The microcomputer 18 controls the internal components as a whole. The key input unit 20 is a portion in which a key signal of an instrument panel is input or a remote control key signal is input. The memory 22 stores video and audio data decoded by the MPEG audio decoder 26 and the MPEG video decoder 28 and stores TOC information of the optical disc 10.

The CD-ROM decoder 24 decodes the signal of the RF amplification / error correcting unit 14 into a digital signal and stores TOC information in the microcomputer 18 or in a separate memory 22.

The MPEG audio decoder 26 decodes the MPEG audio data transferred from the CD-ROM decoder 24 according to the MPEG decompression algorithm and outputs the decompressed audio data to the audio signal processor 34.

The MPEG video decoder 28 decodes the MPEG video data transferred from the CD-ROM decoder 24 according to the MPEG decompression algorithm, and outputs the decompressed video data to the video signal processor 36. In addition, the CD-G decoder 30 decodes the still picture data of the CD-DA or the CD-G transferred from the RF amplifying / error correcting unit 14 and outputs the decoded image to the video signal processing unit 36.

The OSD block 32 generates an OSD screen and transmits the OSD screen to the video signal processor 36, and the OSD screen is synthesized with the video data of the video signal processor 36.

The audio signal processor 34 processes the L-channel and R-channel audio data of the MPEG audio decoder 26 such as noise removal and outputs the same to a speaker or an audio amplifier (not shown). The video signal processor 36 signals the video data of the MPEG video decoder 28 and outputs it to a display device (not shown) such as a television.

2 is a flowchart showing a track search method in the optical disc reproducing apparatus according to the present invention. 1 and 2, the optical disc reproducing apparatus of the present invention performs a track search as in VCD 1.0 while the PBC function is also performed in VCD 2.0 and SVCD.

First, when the playback key signal of the key input unit 20 is input, the microcomputer 18 drives the servo unit 16 as follows to rotate the spindle motor (not shown) at a constant speed and the optical pickup unit 12 to the optical disc. It moves to the lead-in area position of (10). At this time, the lead-in area and the first track area recorded on the optical disc 10 are defined in the format at the time of disc production, and information on these areas is preset in the microcomputer 18. The optical pickup unit 12 picks up TOC information recorded on the optical disc 10 and reads it through the RF amplification / error storage unit 14 and the CD-ROM decoder 24.

The microcomputer 18 determines whether the corresponding optical disk 10 is VCD 2.0 or SVCD from the read TOC information (S10).

In the case of a VCD 2.0 or SVCD disc, the microcomputer 18 stores the TOC information in the microcomputer 18 or in a separate memory 22. (S12) In this case, the SPI area of the TOC information includes menu information necessary for performing a PBC function ( For example, there are still images that introduce menu contents, and slice screens and video screens of a demo dimension).

When the storage of such TOC information is completed, the microcomputer 18 enters the playback mode, decodes the MPEG audio data transferred from the CD-ROM decoder 24 through the MPEG audio decoder 26, and the audio signal processor 34. The decompressed audio data is output through a speaker or an audio amplifier. At the same time, the MPEG video decoder 28 decodes the MPEG video data transmitted from the CD-ROM decoder 24, and outputs the decompressed video data to the display device such as a television via the video signal processing unit 36. (S14)

The microcomputer 18 determines whether a menu key signal is input through the key input unit 20 (S16).

As a result of the determination in S16, when the menu key signal is not input, the microcomputer 18 continues to step S14. However, when a menu key signal is input, the microcomputer 18 stores the PBC menu information (for example, still images introducing the menu contents and demonstration dimensions) in the SPI area of the TOC information stored in its own or separate memory 22. Slice screens and video screens) are read and generated as OSD screens through the OSD block 32. The video signal output from the video signal processor 36 and the OSD screen of the PBC menu are combined to be displayed (S18).

The microcomputer 18 determines whether a number key signal for track search is input through the key input unit 20 (S20).

As a result of the determination in S20, when the number key signal for the track search is not input, the microcomputer 18 continues with step S14. However, when an arbitrary track number key signal for track search is input, the microcomputer 18 determines whether the PBC function preset in the playback apparatus is on (S22).

As a result of the determination in S22, when the PBC function is on, the microcomputer 18 stores the input target track number and status information on whether the PBC function is on or off in the memory 22. (S24)                     

Then, the microcomputer 18 temporarily sets the PBC function to off and skips the SPI area in the TOC of the optical disc 10 so as not to perform the PBC function as in VCD 1.0 (S26).

The microcomputer 18 drives the servo unit 16 to transfer the optical pickup unit 12 to the position area of the corresponding track number, and picks up the information recorded in the corresponding track through the optical pickup unit 12 to RF amplification / error. It reads through the storage unit 14 and the CD-ROM decoder 24. The OSD block 32 generates the OSD screen of the PBC menu into which the corresponding track number is inserted, and then displays the combined video signal with the video signal of the video signal processor 36 (S28 to S30).

The microcomputer 18 determines whether the previous PBC status information stored in the memory 22 is the same as the status information of the current PBC function. As a result, if the two PBC status information does not match, the microcomputer 18 returns to the stored previous PBC status. (S32 to S34) That is, since the previous PBC state was on, the state is reset to the state of performing the PCB function. If the two PBC status information coincides, it ends.

On the other hand, if it is determined in S22 that the PBC function is in an off state, the microcomputer 18 enters the step S28 and transfers the optical pickup unit 12 to the position area of the corresponding track number, and then, through the optical pickup unit 12. The information recorded in the track is picked up and performed again from the step of reading the RF amplification / error storing unit 14 and the CD-ROM decoder 24.

3 is a diagram illustrating a menu screen displayed on a display screen while performing a PBC function in an optical disk reproducing apparatus according to the present invention.

Referring to FIG. 3, since the optical disc player of the present invention provides the OSD menu screen 200 for searching for PBC tracks on the display screen 100 regardless of VCD1.0, VCD2.0, SVCD, DVD, While performing a function, the desired optical disc track can be searched through the OSD menu screen 200.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

As described above, the present invention overcomes the limitation that the track search cannot be performed in the playback state where the PBC function is performed by allowing the track search even when the PBC function is on when the optical disc having the PBC function is played back. Can be.

Claims (2)

As a method of searching for tracks on an optical disc, Storing the TOC information of the optical disk when the optical disk is a disk performing a PBC (PlayBack Control) function; Displaying menu information in the TOC information when a menu key signal is input while reproducing data recorded on the optical disc; Determining whether a preset PBC function is on or off when the track number key signal for the track search is input; Storing the input track number and the preset previous PBC function state when the preset PBC function is on; Setting the current PBC function to off and retrieving and displaying information of the input track number from the optical disc; Track search method of the optical disc playback device comprising a. The method of claim 1, And after retrieving and displaying the information of the input track number, returning to the previous PBC function state if the stored previous PBC function state and the current PBC function state are not the same. How to track search.

Images