KR100569545B1 - Method for searching title of the dvd player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a title search method of a DVD player. In particular, when a signal for jumping from a searched title to another title address is input, data corresponding to the address of the searched title in the VTS information is read and reproduced, and a jump signal is input. If the playback is not possible even if playback is repeated, the process of repeating the playback by changing the address of the title to be jumped by the set value is repeated, and if the playback is not repeated even if the playback process is repeated more than the set number of times, VTSI control in the VTS information After determining whether there is a title file name of a jump target in the signal, if there is a title file name, data is read and reproduced at an address position matching the file name. Therefore, the present invention can improve the accuracy of the title search process.

DVD player, title, VTS, filename,

Description

How to search for title of DVD player {METHOD FOR SEARCHING TITLE OF THE DVD PLAYER}

1 is a view showing briefly the configuration of a general DVD player;

2 is a flowchart showing a title searching method of a DVD player according to the prior art;

3 is a flowchart illustrating a title searching method of a DVD player according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10: optical pickup portion 12: motor drive portion

14: Amplification and Servo Control Unit 15: DSP

16: decoder 18: video signal processing unit

20, 24: output unit 22: audio signal processing unit

26: microcomputer 28: input unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a title search method for DVD (Digital Video Disk) play, and more particularly, to a title search method for a DVD player to search for a title without skipping when a DVD title search fails.

In general, a DVD is a high-density optical disk with a digital signal recorded up to 8 hours of video and audio in the same diameter as a compact disk (CD). These DVDs have discs containing several pieces of content such as movies called titles. The DVD player selects and plays a desired title using a title menu when playing video data divided into such titles.

1 is a diagram schematically showing a configuration of a general DVD player. Referring to FIG. 1, a DVD player includes an optical pickup unit 10 for irradiating light onto an optical disk storing data and detecting reflected light, a motor driver 12 for rotating the optical disk, and an optical pickup unit 10. Digital signal processing of the amplification and servo control unit 14 and the amplification and servo control unit 14 for converting and amplifying the data detected by the signal into an electrical signal and controlling the tracking or servo of the optical pickup unit 10. DSP 15 for error correction, a decoder 16 for MPEG decoding the data of the DSP 15, a video signal processor 18 for signal processing the video signal decoded by the decoder 16, and a decoder 16; An audio signal processor 22 for signal processing of the audio signal decoded by the output signal, an output unit 20 and 24 for outputting video and audio signals of the video signal processor 18 and the audio signal processor 22, respectively, Microcomputer (26) to fully control the internal configuration And an input unit 28 to which an operation key signal or a remote control signal of the player is input.

On the other hand, the DVD data format reproduced in such a DVD player includes a lead-in area in which control data and rough information on data recorded on a disc are recorded, a volume and file structure area, Next, the video area is composed of one VMG (Video ManaGer) area, 1 to 99 VTS (Video Title Set) areas, and a lead-out area.

Each VTS area, which is a substantial data area, is a set of titles, control data called VTSI (Video Title Set Information), VTSM_VOBS representing data for a menu of the VTS, VTSTT_VOBS that is a video object set for titles in the VTS, and control data. It consists of VTSI＿BUP which is backup data of.

2 is a flowchart illustrating a title searching method of a DVD player according to the prior art. 1 and 2, a title searching method of a conventional DVD player is as follows.

First, when a key signal for selecting a title search mode is input from the input unit 28 (S10), the microcomputer 26 controls the motor driving unit 12 to rotate the optical disk and simultaneously through the optical pickup unit 10. Control to read the information of the VTS area recorded on the track of the disc.

The amplification and servo control unit 14 amplifies the title menu of the VTS region read from the optical pickup unit 10, and the DSP 15 digitally processes the amplified signal and corrects an error using an error correcting code (ECC). do. The decoder 16 decodes the title menu data by performing MPEG decoding, processes the decoded title menu video signal through the video signal processor 18, and delivers the decoded title menu video signal to the output unit 20.

For example, after a menu having three titles X is displayed on the screen of a television connected to the output unit 20, a key for searching for any one of three titles X through the input unit 28 is displayed. When the signal is input, the microcomputer 26 moves the optical pickup section 10 to the track position to the address of the title X to be searched, reads the VTS information of the corresponding title, and amplifies the servo control unit 14 and the DSP ( 15) and control to output through the decoder 16, the video signal processor 18 and the output unit 20 (S12).

When a signal for jumping to the address (a) of another title is input through the input unit 28 instead of the searched title among the three titles, the microcomputer 26 controls the motor driving unit 12 to rotate the optical disc and simultaneously. The optical pickup unit 10 is moved to the track of the disc corresponding to the address of the title (X, the title to be jumped) currently found in the VTS information, and the video and audio data of the title is read and reproduced. (S14, S22) Amplification And the servo control unit 14 amplifies the video and audio data of the title read by the optical pickup unit 10, and the DSP 15 digitally processes and error corrects the amplified signal. The decoder 16 decodes the video and audio data of the title by performing MPEG decoding, and transmits the video signal and the audio signal to the respective output units 20 and 24 through the video signal processor 18 and the audio signal processor 22. Outputs

However, even if a signal for jumping to the address (a) of another title is input instead of the title (X) searched out of the three titles through the input unit (28) at S14, the address (a) of the title via the optical pickup unit (10). If the correct signal is not detected in the microcomputer 26 compares whether the jump count number T is a set number n (S16).

As a result of the comparison in S16, if the jump count number T is within the set number n (T≥n), the microphone 26 changes the address a of the title to jump by the set value (for example, a + 1). In step S18, the optical pickup unit 10 moves the track position to the changed address (a + 1) of the title X to be jumped to read video and audio data of the corresponding title, and then amplifies and servos the control unit 14. Then, the process of controlling to output through the DSP 15, the decoder 16, the video signal processor 18 and the output unit 20 is repeated.

If the comparison result of S16 indicates that the jump count number T is greater than or equal to the set number n (T <n), the microcomputer 26 determines that the change of the address of the title X for the jump has failed, and the corresponding address is failed. Searching for a new title (X + 1) other than the S1 is performed (S20).

By the way, the title search method of the DVD player according to the related art is a jump process of the title any more when the repeated reading of the title (X) address (a) of the jump target fails for a predetermined number of times (T <a). Skip and perform a search to the next new title (X + 1).

An object of the present invention is to find an address matching a title file name of a jump target by using the VTSI control information and jump to the address position when a jump to any title fails a predetermined number of times during the title search process. To provide a title search method of the DVD player to improve the accuracy of the.

In order to achieve the above object, the present invention provides a method for searching for a title in a play of a digital video disc (DVD), wherein when a key signal for searching for any title in the disc is inputted, the title at the title address of the search target is input. Reading the VTS information, and reading and playing data corresponding to the address of the jump target title in the VTS information when a signal for jumping to a different title address from a title searched according to the VTS information of the corresponding title is inputted; Repeating the step of changing the address of the title to be jumped by a set value when the jump signal is not reproduced even if the jump signal is input; The VTS information if the playback is not possible even if repeated And determining that there is the jump destination title in the file name VTSI control signal, if there is the jump destination title file name includes the step of playing take read the data at the address position that matches the file name.

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

3 is a flowchart illustrating a title searching method of a DVD player according to the present invention. 1 and 3, a title searching method of a DVD player according to the present invention is as follows. At this time, the search method of the present invention will be described with reference to the configuration of the DVD player of FIG.

First, when a key signal for selecting a title search mode is input from the input unit 28 (S100), the microcomputer 26 controls the motor driving unit 12 to rotate the optical disc and simultaneously through the optical pickup unit 10. Control to read the information of the VTS area recorded on the track of the disc.

The amplification and servo control unit 14 amplifies the title menu of the VTS region read from the optical pickup unit 10, and the DSP 15 digitally processes the amplified signal and corrects an error using an error correcting code (ECC). do. The decoder 16 decodes the title menu data by performing MPEG decoding, processes the decoded title menu video signal through the video signal processor 18, and delivers the decoded title menu video signal to the output unit 20.

For example, after a menu having three titles X is displayed on the screen of a television connected to the output unit 20, a key for searching for any one of three titles X through the input unit 28 is displayed. When the signal is input, the microcomputer 26 moves the optical pickup section 10 to the track position to the address of the title X to be searched, reads the VTS information of the corresponding title, and amplifies the servo control unit 14 and the DSP ( 15) and control to output through the decoder 16, the video signal processor 18 and the output unit 20 (S102).

When a signal for jumping to the address (a) of another title is input through the input unit 28 instead of the searched title among the three titles, the microcomputer 26 controls the motor driving unit 12 to rotate the optical disc and simultaneously. The optical pickup unit 10 is moved to the track of the disc corresponding to the address of the title X currently retrieved in the VTS information to read and reproduce the video and audio data of the title X. (S104, S116) The servo control unit 14 amplifies the video and audio data of the title read by the optical pickup unit 10, and the DSP 15 digitally processes and error corrects the amplified signal. The decoder 16 decodes the video and audio data of the title by performing MPEG decoding, and transmits the video signal and the audio signal to the respective output units 20 and 24 through the video signal processor 18 and the audio signal processor 22. Outputs

However, even if a signal for jumping to the address (a) of another title is input instead of the title (X) searched out of the three titles through the input unit (28) in S104, the address (a) of the title through the optical pickup unit (10). If the correct signal is not detected in the microcomputer 26 compares whether the jump count number (T) is a set number (n) (S106).

As a result of the comparison in S106, if the jump count number T is within the set number n (T≥n), the microcomputer 26 changes the address a of the title to jump by the set value (for example, a + 1). (S108) The optical pickup unit 10 moves the track position to the changed address (a + 1) of the title X to be jumped, reads the video and audio data of the corresponding title, and amplifies and servos the control unit 14, The process of controlling to output through the DSP 15, the decoder 16, the video signal processor 18, and the output unit 20 is repeated.

If the comparison result of S106 indicates that the jump count number T is equal to or greater than the set number n (T <n), the microcomputer 26 may determine the title file name (for example, VTS_X_0.1FO) of the jump target in the VTSI control signal in the VTS information. It is determined whether there is. (S110)

As a result of the determination in S110, if there is a VTS_X_0.1FO file name of the title, the microcomputer 26 controls the optical pickup unit 10 to find an address matching the VTS_X_0.1FO and jump to the address position, and then proceeds to step S116. (S114)

If the determination result of S110 indicates that there is no VTS_X_0.1FO which is the file name of the title, the microcomputer 26 determines that the address of the title X for jumping has failed, and a new title other than the corresponding address (X). The search process to +1) is performed (S112).

As described above, the present invention controls to find an address matching the title file name of the jump target and jump to the address position by using the VTSI control information when jumping to any title fails a certain number of times during the title search process. As a result, the accuracy of the title retrieval process can be improved.

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.

Claims (2)

In the method of searching for a title in the play of a digital video disc (DVD), Reading a VTS information of a corresponding title from a title address to be searched if a key signal for searching for any title in the disc is input; Reading and playing data corresponding to an address of a jump target title in the VTS information when a signal for jumping to a different title address is input from a title searched according to the VTS information of the corresponding title; Repeating the process of changing the address of the title to be jumped by a set value when the jump signal is not played even if the jump signal is input; Determining whether the title file name of the jump target exists in the VTSI control signal in the VTS information when the reproduction is not performed even if the process of changing the address by the set value is repeated more than a set number of times; Reading and playing data at an address position matching the file name if the title file name of the jumping object exists; DVD title search method comprising a. The method of claim 1, And searching for another new title if there is no file name of the title to be jumped to.

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