KR19990050069A - How to display remaining play time of disc structure and optical disc system - Google Patents

Abstract

The present invention relates to a disc structure and a method for displaying the remaining play time of an optical disc system, wherein the remaining time data from the current play position of the disc to the end point of the program area, and from the current play position of the disc to the end point of a predetermined program are provided. Detecting a disc containing a sub code including remaining time data and the sub code while playing the disc; Detecting, from the sub code, a remaining time from a current playback position of the disc to an end point of a program area and a remaining time from a current playback position of the disc to an end point of a predetermined program; And displaying the remaining time from the detected current playback position of the disc to the end point of the program area and the remaining time from the current playback position of the disc to the end point of a predetermined program.

Description

How to display remaining play time of disc structure and optical disc system

The present invention relates to an improved disc structure and a method for displaying the remaining play time of an optical disc system using the improved disc structure. In particular, the remaining play time is recorded at predetermined intervals in a track of a disc when the disc is manufactured. The present invention relates to a method of displaying a remaining play time of an optical disc system capable of displaying a play remaining time of a disc.

In general, a disk utilized in an optical disk system may be divided into a read in area 10, a program area 20, and a read out area 30 as shown in FIG. 1. .

Here, in the lead-in area 10, track numbers, position data corresponding to the start and end points of the track are created and recorded as TOC (Table Of Content), and in the program area 20, a program such as a movie or a music video is recorded. This one or more programs are stored, and the data related to the end of the program area is stored in the lead-out area 30.

On the other hand, the program data contained in the program area 20 is configured in a predetermined signal format, which will be described below with reference to FIGS. 2A and 2B.

In FIG. 2A, program data can be distinguished in units of frames, and one frame includes a sub code B containing a synchronization signal A for indicating the start of a frame, control information, and various service information. ), An information pit (C) containing substantial audio and video data, and an error information pit (D) for error correction.

Herein, the above-described sub code B is called a user bit or a control signal, and ultimately, a code for facilitating the use of a disc for a user.

Such a sub code consists of a plurality of channels according to each function, and the most used channels are P channel and Q channel. The P channel is a signal that indicates between one program and another program. The P channel is displayed as off in the region where the program is recorded and on in the region where the program is not recorded, so that the start or end point of the program can be known. Applies to

On the other hand, the Q channel has a program number (track number), an index number in the program, an accumulated time (absolute time) from the start of the program area, and an elapsed time from the start of a predetermined program, as shown in FIG. (Relative time) and other information are included. Q channel data is utilized for program number designation, index designation, and time designation.

In addition, the absolute time included in the Q channel signal is a cumulative time recorded from the start point to the end of the program area of a single disc. Or "How many minutes have you played from the beginning of the program area to the current playback position?" The relative time is the elapsed time from the beginning of each program to the current playback position, where the "N (N: integer) th program It is used to display "how many minutes has been played from the start point to the current position" or "what is the remaining playing time of the currently playing program".

However, the conventional technique of displaying the total remaining playback time and the remaining playback time of the currently playing program using the absolute time and the relative time has the following problems.

That is, the absolute time described above is the cumulative time from the start point of the program area of the disc to the current playback position, and the relative time is the cumulative time from the start point of each program to the current playback position. In order to display the total remaining time and the remaining playing time of the currently playing program, the operation must be performed by subtracting the absolute time from the playing time of the entire disc or subtracting the relative time from the total playing time of the currently playing program. The total remaining time and the remaining time of the currently playing program can be known.

Therefore, such a calculation process results in a time delay when displaying the total remaining time of the disc and the remaining time of playback of the currently playing program, or puts a load on the system control unit of the optical disc system which performs such a calculation. Is there.

Accordingly, a first object of the present invention is to provide a disc structure in which the reproduction residual absolute time and the reproduction residual relative time are recorded in the Q channel.

In addition, a second object of the present invention is to provide a method of displaying the remaining play time of an optical disc system that can reduce the load more quickly by using the disc having the play remaining absolute time and play remaining time relative to the Q channel.

In order to achieve the first object, the present invention provides a disc structure comprising: remaining time data from a current playback position of the disc to an end point of a program area, and from a current playback position of the disc to an end point of a predetermined program. The sub code comprising the remaining time data of is included in the disc.

In addition, the present invention includes the remaining time data from the current playback position of the disc to the end point of the program area and the remaining time data from the current playback position of the disc to the end point of the predetermined program in order to achieve the first object. A method for displaying the remaining play time of an optical disc system using a disc having a configured sub code, the method comprising: detecting the sub code while playing the disc; Detecting, from the sub code, a remaining time from a current playback position of the disc to an end point of a program area and a remaining time from a current playback position of the disc to an end point of a predetermined program; And displaying the remaining time from the detected current playback position of the disc to the end point of the program area and the remaining time from the current playback position of the disc to the end point of the predetermined program.

1 is a general structural diagram of a disc.

2 (a) and 2 (b) are signal format diagrams recorded on a disc.

3 is a signal format diagram showing a preferred embodiment of the disk structure of the present invention.

4 is a configuration diagram of an optical disc system for performing the remaining playback time display method of the present invention.

Fig. 5 is a detailed flowchart showing a preferred embodiment of the method for displaying the remaining play time of the present invention.

<Description of the symbols for the main parts of the drawings>

100; Disk 200; Disc player

300; System control unit 400; Key input section

500; Display

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

3 shows a signal format diagram showing a preferred embodiment of the disc structure of the present invention.

As shown in Fig. 3, the signal format of the Q channel recorded on the disc includes the program number (track number), the index number in the program, the remaining time from the current playback position to the end of the program area (playback absolute time). And information such as the remaining time (reproduction remaining relative time) from the current playback position to the end point of the predetermined program.

Therefore, when the disc containing the Q channel data having the signal format as shown in FIG. 3 is reproduced, the remaining time of reproduction can be immediately known when the Q channel data is detected.

FIG. 4 shows an optical disc system for performing the method of displaying the remaining time of reproduction of the present invention using a disc containing Q channel data of the signal format as shown in FIG.

In FIG. 4, the optical disc system includes a disc 100, a disc player 200, a system control unit 300, a key input unit 400, and a display unit 500 including Q channel data having a signal format as shown in FIG. 3. do.

In FIG. 4, the disc player 200 reproduces and outputs program data recorded on the disc 100, and detects and provides a sub code included in the program data to the system controller 300.

The system control unit 300 controls the playback operation of the disc player 200, and based on the Q channel data included in the sub code input from the disc player 200, the system control unit 300 moves from the current playback position to the end point of the program area. The remaining time (playback absolute absolute time) and the remaining time (playback remaining time) from the current playback position to the end point of the predetermined program are determined, and when the playback remaining display key signal is input from the key input unit 400, the determined playback The display unit 500 is controlled to display the remaining absolute time and the reproduction remaining relative time.

Fig. 5 is a detailed flowchart showing a preferred embodiment of the reproduction residual display method of the present invention, wherein the reproduction residual display method of Fig. 5 is performed using the hardware of Fig. 4 described above.

Therefore, the reproduction residual display method will be described below with reference to FIGS. 3, 4, and 5.

First, during normal reproduction of the optical disc system (S1), the disc player 200 reproduces and outputs program data recorded on the disc 100 under the control of the system controller 300, and detects sub codes included in the program data. To the system control unit 300.

The system controller 300 controls a playback operation of the disc player 200 and receives a sub code input from the disc player 200.

At this time, when the user inputs a key signal for displaying the absolute remaining time of reproduction from the key input unit 400 (S2), the system control unit 300 uses the Q channel data included in the sub code input from the disc player 200. After detecting the absolute remaining time of reproduction immediately (S3), the display unit 500 is controlled to display the absolute remaining time of reproduction (S4).

In addition, when a user inputs a key signal for displaying the remaining relative time of reproduction from the key input unit 400 (S5), the system control unit 300 uses the Q channel data included in the sub code input from the disc player 200. After detecting the playback remaining relative time immediately (S6), the display unit 500 is controlled to display the playback remaining relative time (S7).

Accordingly, the display unit 500 displays the reproduction remaining absolute time or the reproduction remaining relative time.

As described above, the present invention records the absolute play time and the remaining play time relative to the Q channel of the disc, and displays the play long time using the disc having such a structure, thereby reducing the load on the system controller. It can be effective.

Claims (2)

In the structure of the disc: And a sub code including residual time data from a current playback position of the disc to an end point of a program area and remaining time data from a current playback position of the disc to an end point of a predetermined program. Playback of an optical disc system using a disc in which the remaining time data from the current playback position of the disc to the end point of the program area and the sub-codes including the remaining time data from the current playback position of the disc to the end point of the predetermined program are recorded. In the remaining time display method: Detecting the sub code while playing the disc; Detecting, from the sub code, a remaining time from a current playback position of the disc to an end point of a program area and a remaining time from a current playback position of the disc to an end point of a predetermined program; Displaying the remaining time from the current playback position of the detected disc to the end point of the program area and displaying the remaining time from the current playback position of the disc to the end point of a predetermined program. Way.