KR100226970B1 - Method for reproducing information in digital video disk of digital video disk player - Google Patents

Abstract

The present invention relates to a digital video disc flare driving method for repetitively specifying a section of a digital video disc in which subtitle information corresponding to video and audio information is recorded prior to the video and audio information. Reproducing information of the digital video disc recorded from the designated interval start position to the designated interval end position if it is in the process (S1-S4); Storing the times (# 1-#n) at which subtitle information is detected during reproduction of the information in the digital video disc (S5, S6) when not in the repeat playback mode; Whenever the section repeat position setting mode is set while the information in the digital video disc is being played, the section repeat play start position (A) and the section repeat play end position (B) are sequentially set, and the set times AT and BT are respectively stored. Steps S8-S11; When the time information (AT, BT, # 1- # n) is read out and the time (#n) exists within a predetermined time before this time (AT), the section repeat playback start position (A) is moved to the time (#n). Moving to a corresponding position (S12, S13, S16); If the time (#n) does not exist within a predetermined time before the time (AT), it corresponds to the time (#n) existing within a predetermined time after the time (AT) of the time (#n) existing in the time (AT, BT) (S14, S15, S16) moving the section repetition reproduction start position A to a position; Starting playback from the section repeat playback start position A and performing the section repeat playback mode (S18).

That is, in the present invention, when the start point of the section repeat playback is designated before or after a predetermined time before the position where the caption is recorded, the start point is automatically changed to the position where the caption is recorded when the section repeat playback function is performed. Has the effect of allowing the user to watch the subtitles necessary for the repeated playback of the section.

Description

How to play AB repeat on a digital video disc player

The present invention relates to a digital video disk (DVD) player, and more particularly, to a method of repeatedly playing a designated section of a DVD.

The information of the disc used in the DVD player is formed by tracks of 0.74 μm pitch (the resonator disc is 1.4 μm ~ for a long time) arranged in a series of irregularities called pits, and the front surface of the disc is coated with a reflective film such as aluminum. Since only one quarter of the laser wavelength is pitted in the pit portion, it is possible to read the change in the amount of reflected light by diffraction. Regenerated discs based on this principle can be mass-produced at low cost because they are plastic molded parts.

In the case of discs that are widely used, polycarbonate cross-sectional structures having an outer diameter of 120 mm are generally used, and PMMA double-sided fixing structures having an outer diameter of 300 mm are used for laser discs.

The information of these disks is read by the condensing beam emitted from the optical head, and in the case of DVD, which is generally spread, a semiconductor laser having a wavelength of 630 to 635 nm is used.

Players for reproducing data of such DVDs usually have a section repeat playback function for designating predetermined sections of a DVD and repeatedly playing the data of these sections. However, in addition to video and audio information, the DVD contains subtitle information which enables the display of such audio information as text, and these subtitle information is recorded before the corresponding video and audio information. If a wrong section is specified, there is a problem in that subtitle information cannot be viewed.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a DVD player which automatically extends a repeat playback section to a section where subtitle information corresponding to video and audio data in the repeat playback section of a DVD is recorded. It is to provide a method for repeated playback of the interval.

In the method of repeating playback of a DVD player according to the present invention, a digital video disc flare driving is performed in which a subtitle information corresponding to video and audio information is repeatedly played by designating a section of a digital video disk recorded before the video and audio information. A method comprising: reproducing information of the digital video disc recorded from a designated interval start position to a designated interval end position when performing a repeat playback mode; Storing time (# 1- # n) at which subtitle information is detected during reproduction of information in the digital video disc if the repetitive playback mode is not performed; Whenever the section repeat position setting mode is set while the information in the digital video disc is being played, the section repeat play start position (A) and the section repeat play end position (B) are sequentially set, and the set times AT and BT are respectively stored. Steps; When the time information (AT, BT, # 1- # n) is read out and the time (#n) exists within a predetermined time before this time (AT), the section repeat playback start position A corresponds to the time (#n). Moving to a position; If the time (#n) does not exist within a predetermined time before the time (AT), it corresponds to the time (#n) existing within a predetermined time after the time (AT) of the time (#n) existing in the time (AT, BT) Moving the section repetition reproduction start position A to a position to be performed; Starting playback from the section repeat playback start position (A) and performing the section repeat playback mode.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic block diagram of a digital video disc player for performing a method for repeating interval playback according to the present invention;

2 is a flowchart of a method for repeating interval play of a digital video disc player according to the present invention;

FIG. 3 is a diagram for explaining a method of repeating interval play of a digital video disc player according to the present invention; FIG.

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

1: digital video disc 2: servo device

3: spindle motor 4: optical pickup

5: amplifier 8: digital signal processing device

9: Digital / Analog Converter 10: Central Control Unit

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a DVD player according to the present invention, in which a DVD (1) in which TOC, video and audio data, etc. are recorded, is transferred to a spindle motor (3) driven by the control of a servo device (2). Thereby rotating at a predetermined speed.

The information of the disk rotating by the spindle motor 3 is read by the optical head 4, and the disk information read by the optical head 4 is amplified by the amplifier 5 and applied to the digital signal processing apparatus 8. The digital signal processing apparatus 8 decodes the image codes among the information read by the optical head 4 and applies them to the digital / analog converting section 9, but other control codes of the player are included in the servo apparatus 2. To apply.

The signals converted into analog signals by the digital / analog converter 9 are amplified and processed by the signal processor 11 and then output to the monitor, and the central controller 10 is used for control from the servo device 2. According to the code, information for controlling the rotational speed of the DVD, that is, the rotational speed of the spindle motor 3 and the movement of the optical pickup 4, is applied to the servo device 2, and the servo device 2 is the central control device. Under the control of 10, the drive of the spindle motor 3 and the feed motor 7 is controlled as described above. On the other hand, the key processing unit 13 is connected to the central processing unit 10, and the key metrics 13 are configured with various function keys for controlling the driving of the player. That is, the central processing unit 10 controls the driving of the player in response to the pressed key by scanning the driving key of the key matrix 13, and the interval repeating key is configured in the key matrix 13 for implementing the present invention. It should be easily understood from the following description.

3 is a flowchart of the present invention for sequentially playing back camera video signals in a DVD player having the above-described configuration.

In this configuration, the central control apparatus 10 determines whether the driving mode of the current player is in the playback mode in step S1, and proceeds to step S2 in the playback mode. In step S2, the central control apparatus 10 determines whether the current player is performing the section repeat play mode in the play mode, and if the player plays the section play mode, the process proceeds to step S3 to determine the end position of the designated section ( It is judged whether or not playback was performed up to B). As described above, whether or not the interval repeat playback mode is performed can be easily detected by determining whether the flag for the interval repeat playback mode is set.

As a result of the determination in step S3, if the data up to the end position B of the current designated section has been reproduced, the central control apparatus 10 causes the servo device 2 to resume the data of the start position A of the designated section. If the data up to the end position B is not reproduced, the current reproduction mode is continued.

On the other hand, as a result of the determination in step S2, if the current section playback mode is not being performed and the normal playback mode is being performed, the central control apparatus 10 proceeds to step S5 to determine whether the data read from the DVD is subtitle data. Judge. As a result of performing step S5, when the read data is the caption data, the central control apparatus 10 stores the time (# 1- # n) at which the caption data is detected in the internal RAM.

However, when the data read out from the DVD is not the caption data, the central control apparatus 10 determines whether the section repeat key of the key matrix 13 is pressed (S8), and when the section repeat key is pressed, the current repeat play is performed. It is determined whether the start position A of the section is set. That is, the central control unit A determines whether the section start position present flag is set, and when it is in the reset state (when the section start position A is not set), the central control unit A determines the time when the section repeat key is pressed and the current time (AT). (S9), and the section start position present flag is set to indicate that the section start position A is set.

However, as a result of the determination in step S8, when the segment start position present flag is in the set state, the central control apparatus 10 proceeds to step S11 to set the time at which the segment repeat key is pressed as the current time BT. , The process proceeds to step S12.

Therefore, the current time AT described above means a time at the start position of the set section, time BT means a time at the end position of the set section, and time (# 1- # n) is subtitle information. You can see that it means the time when the reading.

In step 12, the central control apparatus 12 reads out such time information AT, BT, # 1- # n, and determines whether time #n exists within a predetermined time before this time AT. . The reason for determining whether the time #n before the time AT is present is set after the section in which the position A is recorded as caption information corresponding to the video and audio information as shown in FIG. To determine if there is. That is, the time (# 1) at which the caption is recorded is a predetermined time than the time (AT), where the time (A) is close to the position of the time (# 1), and the video and audio data from the position (A) Set the time at which it is judged to be convenient to be able to watch the subtitle information according to the user's needs by playing from the position of the time (# 1) rather than playing it, for example, the time at which the subtitle is recorded (# 1) is the time (AT). ), The central controller 10 sets the start position of the section playback to the time (# 1). The servo device 2 is controlled so as to change to the position corresponding to the control unit and start playback from this position A (S17, S18).

However, when the time (# 1) in which the caption is recorded differs by more than a predetermined time from the time (AT), the central control apparatus 10 proceeds to step S14, and the time (#) within the time (AT, BT). Determine if n) exists.

As a result of the determination in step S14, if the time #n exists in the times AT and BT, the central control apparatus 10 proceeds to step S15, and in step S15, the time AT and the time It is determined whether the time #n (# 2 in FIG. 3) is less than or equal to the predetermined time, and if the difference is less than or equal to the predetermined time, the process proceeds to step S16. The reason for performing the step S15 is described above. The same reason in one step (S13) will be readily apparent to those of ordinary skill in the art.

In the case where the process proceeds to step S16, as described above, the servo device 2 is changed to a position corresponding to the time (# 2) and the section repeat playback is performed from the changed position A. It is to control (S17).

In this way, the central control apparatus 10 for performing the interval repeat playback from the position A proceeds to step S18 to set a flag during the interval repeat playback mode for performing the step S2, and performs the step S1. To return.

As described above, in the present invention, if the start point of the repeat section playback is specified before or after a predetermined time before the position where the caption is recorded, the start point is automatically changed to the position where the caption is recorded. There is an effect that it is possible to watch a subtitle required at the time of reproduction.

Claims (1)

A method of driving a digital video disc player in which subtitle information corresponding to video and audio information is replayed by designating a section of a digital video disc recorded before the video and audio information. Reproducing (S1-S4) information of the digital video disc recorded from a designated section start position to a designated section end position if the repeat playback mode is being performed; Storing (S5, S6) times (# 1-#n) at which the caption information is detected during reproduction of the information in the digital video disc if the repeat play mode is not performed; Whenever the section repeat position setting mode is set during the playback of the information in the digital video disc, the section repeat play start position (A) and the section repeat play end position (B) are sequentially set, and the set times AT and BT are stored respectively. Step (S8-S11); The time information (AT, BT, # 1- # n) is read out, and if the time (#n) exists within a predetermined time before this time (AT), the section repeat playback start position (A) is changed to the time (#n). Moving to a position corresponding to (S12, S13, S16); If the time #n does not exist within a predetermined time before the time AT, the time #n that exists within a predetermined time after the time AT among the times #n existing in the time AT and BT Moving the section repeating playback start position A to a position corresponding to (S14, S15, S16); Starting (S18) the playback from the section repeat playback start position (A) and performing the section repeat playback mode (S18).

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