KR19980079016A - How to Play an Optical Disc Changer System - Google Patents

Abstract

According to the present invention, when a disc is played and then replaced by another disc, the disc stop position of the disc is stored before replacement, and when the disc is played again, the optical disc changer system starts playback from the stored stop position. It is about a reproduction method of.

The present invention provides a reproducing method of an optical disc changer system in which a plurality of discs are mounted and a predetermined disc to be played is selected, and the reproduction is stopped when a disc replacement signal is input during the reproduction of the fixed disc. A first step of storing data on an ID of a certain disc and data on a reproduction stop position; When the disc is replaced with a new disc based on the disc replacement signal, the ID of the new disc is detected to determine whether the disc has been played before. If the disc has been played before, the playback stop position memorized in the first step starts. A second step of starting playback.

Description

How to Play an Optical Disc Changer System

The present invention relates to a method of reproducing an optical disc changer system. When a disc is played and then replaced with another disc, the disc stops the disc stop position before the disc is replaced. The present invention relates to a method of playing an optical disc changer system that allows playback to start from.

With the development of audio and video media, optical disc players have been developed for recording and reproducing video and audio data on semi-permanent optical discs.

Such an optical disc player reproduces video and audio recorded on an optical disc and outputs it through a screen and a speaker, and has a higher signal-to-noise ratio than conventional video and audio playback devices, thereby reproducing a signal with better image quality and sound quality, and irregularities. It is rapidly developing due to various advantages such as no noise due to reproduction and modulation, very little distortion, no ghost, and random access.

In addition, such an optical disk player has been developed and widely used such as a compact disk player (CDP), a laser disk player (Laser Disk Player), a compact disk graphic player (CDGP) and a video compact disk player. Recently, a digital video disc (DVD) using MPEG-2 moving picture compression technology and a digital video disc player for reproducing the same have been developed, which includes several gigabytes of moving pictures in a 12 cm optical disc such as a current CD. It can record and play back data of giga byte (GB), and it is made to be compatible to play current compact disc and video compact disc.

As the performance and function of the optical disc player develops, the types of data recorded on the optical disc are diversified. In the case of a large amount of data such as movies, it is impossible to record all the data corresponding to one movie on one disc. In some cases, the inconvenience of having to replace or mount a disc every time it occurred.

Therefore, in order to improve these points, an optical disc changer system has been developed. The optical disc changer system configures a tray to mount a plurality of discs in one tray, which includes a tray roulette in which a plurality of discs are rotatable. do.

In general, when performing playback by mounting a plurality of discs in a tray in an optical disc changer system, assuming that the trays A and B are mounted and that the third track of A disc is being played, When a disc is required to be replaced, the optical disc changer system plays disc B by replacing discs A and B. By the way, when the disc is required to be replaced again from the outside, the optical disc changer system replaces the B disc and the A disc to play the A disc. At this time, the optical disc changer system performs playback sequentially from the first track of the A disc.

As described above, in the conventional optical disc changer system, for example, when the A disc is played back after the A disc is played back after being replaced with the B disc, playback is not performed from the previous playback stop position of the A disc. For example, since the A disc is played from the beginning, there is a problem in that the user must view the duplicate file.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When a disc is played and then replaced with another disc, the disc stops the playback stop position before replacing the disc, and when the disc is played again, the disc is stored. It is an object of the present invention to provide a playback method of an optical disc changer system that allows playback to start from a playback stop position.

In order to achieve the above object, the present invention provides a reproducing method of an optical disc changer system in which a plurality of discs are mounted to select and reproduce a predetermined disc, wherein the disc replacement signal is performed during the reproduction of the fixed disc. Stopping playback when is input, but storing the ID of the predetermined disc and data on the playback stop position; When the disc is replaced with a new disc based on the disc replacement signal, the ID of the new disc is detected to determine whether the disc has been played before. If the disc has been played before, the playback stop position memorized in the first step starts. A second step of starting playback.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is an overall block diagram of an optical disc changer system for carrying out the reproduction method of the present invention;

2 is a detailed flowchart showing a playback method according to a preferred embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

10: key input unit 20: control unit

30: optical pickup unit 40: RF signal amplification unit

50: digital signal processing unit 60: servo signal processing unit

70: motor and motor drive unit 80: MPEG decoder

90: video signal processing unit 100: monitor

110: audio signal processing unit 120: speaker

T: Tray Roulette D: Disc

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

1 is an overall block diagram of an optical disc changer system for performing a reservation track reproduction method according to the present invention.

Referring to FIG. 1, the optical disc changer system includes a key input unit 10, a control unit 20, an optical pickup unit 30, an RF signal amplifier unit 40, a digital signal processor 50, a servo signal processor 60, The tray roulette driver 70, the MPEG decoder 80, the video signal processor 90, the monitor 100, the audio signal processor 110, and the speaker 120 are included.

The tray roulette drive unit 70 rotates the tray roulette T so that the selected disk D moves to the chucking position when the predetermined disk D is selected, and when the selected disk D reaches the chucking position, the tray roulette ( Stop the rotation of T).

The optical pickup unit 30 performs an optical pickup from the selected disk D when the disk is in the chucking position and outputs an RF signal (video, audio or text) read accordingly.

The RF signal amplifier 40 amplifies the RF signal provided from the optical pickup unit 30 and provides it to the digital signal processor 50.

The servo signal processor 60 detects focus and tracking error signals from the amplified RF signal and performs focusing servo and tracking servo. In addition, the servo signal processing unit 60 has a feed servo function that, when the viewer selects a specific track or a specific position on the disc, transfers the optical pickup unit 30 directly to the corresponding position so that playback is performed at the corresponding position. .

Meanwhile, the digital signal processor 50 digitally processes the amplified RF signal provided from the RF signal amplifier 40, performs error detection and error correction, and then outputs the signal to the MPEG decoder 80. Entry information indicating the track position on the track is detected and output.

The MPEG decoder 80 separates an error corrected bit stream type digital signal provided from the digital signal processor 50 into a video signal and an audio signal, and the video signal and the audio signal are based on the MPEG compression format. After decoding, the video signal is output to the video signal processor 90 and the audio signal processor 110, respectively.

The video signal processor 90 processes the decoded video signal provided from the MPEG decoder 80 and outputs it to the monitor 100 for display.

The audio signal processor 110 converts the decoded audio signal provided from the MPEG decoder 80 into an analog signal and outputs the analog signal to the speaker 120.

Meanwhile, the key input unit 10 provides a function key signal for performing a predetermined function in the video compact disc player, and the control unit 20 configures control signals according to the key signal provided from the key input unit 10, respectively. Provided by the elements to control the predetermined function to be executed.

Fig. 2 shows a detailed flowchart showing a reproduction method according to a preferred embodiment of the present invention, and the reproduction method of Fig. 2 is performed using the optical disc changer system of Fig. 1 described above. Therefore, the following description will be given with reference to FIGS. 1 and 2.

First, when the user provides the control unit 30 with a key signal for selecting the predetermined disk D using the key input unit 10 (S1), the control unit 30 moves the selected disk D to the chucking position. The tray roulette drive unit 70 is controlled. Then, the tray roulette drive unit 70 rotates the tray roulette T so that the selected disk D reaches the chucking position. When the disk selected by the user reaches the chucking position, the optical pickup unit 30 reads the TOC information contained in the disk D. FIG. The read TOC information is amplified by the RF signal amplifying unit 40 and provided to the control unit 20 via the digital signal processing unit 50. The control unit 20 designates a predetermined address for the TOC information and stores the internal memory. Store in (S2).

Thereafter, the control unit 20 controls the system to perform playback of tracks of a predetermined disk (S3). When the reproduction mode is set as described above, the optical pickup unit 30 reads out the video and audio signals recorded on the disc D and transfers them to the RF signal amplifier 40. Then, the RF signal amplification unit 40 amplifies the video and audio signals based on a predetermined degree of amplification and transmits the same to the digital signal processing unit 50. The digital signal processor 50 digitally processes the amplified video and audio signals and transmits the digital signal to the MPEG decoder 80. The MPEG decoder 80 decodes an input signal, and detects and provides an entry information for determining a predetermined position of a track on the disc D to the controller 20.

In this case, the above-described entry information is information continuously recorded at predetermined intervals on the track of the disc D. Referring to such entry information, a predetermined position of the disc D can be directly searched for.

Meanwhile, the controller 20 determines whether the disc replacement signal is input through the key input unit 10 (S4), and when the disc replacement signal is provided, the playback is stopped. After the detection lower limit (S5), the ID number and the number of tracks of the disc D currently being played are detected with reference to the above-described TOC information (S6).

If the number of tracks of the currently playing disc D is greater than or equal to 3, for example, the control unit 20 detects the number of the track including the current playback stop position and stores it in the internal memory (S7, S8).

However, if the number of tracks of the disc D currently being reproduced is smaller than 3, the current reproduction stop position is identified with reference to the above-mentioned entry information and the reproduction stop position data is stored in the internal memory (S7, S9).

In this case, if the number of tracks of the disc D is greater than or equal to 3, it is usually high that the song accompaniment disc contains a large number of songs, and if the number of tracks of the disc D is less than 3, it is more likely that the disc contains a movie. .

Therefore, if it is a song accompaniment disc, it would be desirable to perform playback from the beginning of a track to be reproduced later, and if it is a movie disc, there will be no reason to re-watch the already watched screen. Therefore, in the case of a movie disc, entry information about a reproduction stop position is immediately stored.

As such, when entry information about the track number or the reproduction stop position currently being reproduced is stored in the internal memory of the control unit 20, the control unit 30 stops the reproduction and then replaces the tray roulette drive unit 70 with another disc. ) Rotates the above-described tray roulette T under the control of the control unit 20 to move the new disk D to the chucking position. When the new disk D reaches the chucking position, the optical pickup unit 30 reads the TOC information of the new disk D (S10) and provides it to the RF signal amplifier 40. Therefore, the TOC information will be provided to the controller 20 via the RF signal amplifier 40 and the digital signal processor 50.

Then, the controller 20 compares the ID data of the disk D with the ID data of the previously stored disk D from the input TOC information to determine whether the disk D has been reproduced before (S11). . If the disc D has not been played before, the controller 20 controls the system to perform normal playback of the disc D.

However, if the disc D has been played before, the previous playback stop position may be stored in the internal memory by the above-described steps S8 and S9.

Therefore, if the new disk D has been played before, the controller 20 searches the internal memory to detect a previous playback stop position. The previous playback stop position data stored in the internal memory will be track number or entry information. The control unit 20 detects the start position of the track number when the reproduction stop position data stored in the memory is the track number. In addition, the controller 20 controls the servo signal processor 60 so that the optical pickup unit 30 is directly transferred to the start point of the detected track number. The servo signal processing unit 60 transfers the optical pickup unit 30 to the start point of the track number under the control of the control unit 20. When the transfer is completed, the control unit 20 controls the system so that playback is performed from the start point of the track number.

On the other hand, if the track number stored in the internal memory is entry information, the control unit 20 controls the servo signal processing unit 60 so that the optical pickup unit 30 is transferred to the detected entry position. The servo signal processing unit 60 transfers the optical pickup unit 30 to the entry under the control of the control unit 20. When the transfer is completed, the control unit 20 controls the system to perform reproduction from the entry (S12).

In other words, for example, when the A and B discs are mounted in the tray roulette, when the A disc is played, the TOC information of the A disc is stored and then played. If a disc replacement signal is provided while the A disc is being played, the A disc is stopped, the entry information or track number for the position at which the A disc is stopped is stored, and the B disc is played. During the playback of the B disc, if a disc replacement signal is provided, the entry information or track number for the playback stop position is stored like the A disc, and then the B disc is stopped and the disc is replaced. Therefore, when the A or B disc is played again later, it is possible to play directly from the previous playback stop position with reference to the stored entry information or track number.

As described above, when the play method according to the present invention plays a predetermined disc and replaces it with another disc, the play stop position of the disc is memorized before the replacement, and when the disc is played again later, the play starts from the stored play stop position. Since it starts, there is an effect that can facilitate the user's convenience.

While the invention has been shown and described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various modifications, changes and omissions can be made without departing from the spirit and scope of the invention.

Claims (2)

In the playback method of the optical disk changer system that mounts a plurality of disks to select and play a predetermined disk to watch, Stopping the playback when a disc replacement signal is input during the playback of the fixed disk, but storing the ID of the fixed disk and the data about the position at the playback stop; When the disc is replaced with a new disc based on the disc replacement signal, the ID of the new disc is detected to determine whether the disc has been played before. If the disc has been played before, the playback stop position memorized in the first step starts. A reproduction method of an optical disc changer system comprising a second step of starting reproduction. The method of claim 1, further comprising: determining the number of tracks; storing the playback stop position as a starting point of the track when the number of tracks is greater than or equal to a reference value; A reproduction method of an optical disc changer system, comprising storing a reproduction stop position as an entry.