KR19990050074A - How to play data on optical disc system - Google Patents

Abstract

The present invention relates to a data reproducing method of an optical disc system having a high capacity memory divided into a plurality of memory areas for storing program data in track units, and reproducing program data recorded on a disc. A first step of determining an ID of a mounted disc and determining whether program data recorded on the disc is stored in the memory; In the first step, if the program data recorded on the disc is not stored in the memory, the program data of the disc is reproduced, and when a key signal for storing the program data of the selected track is input, A second step of determining an ID and a track number of the selected track; A third step of reproducing program data of the selected track from the disc and storing the program data in a pre-allocated memory area of the memory; A fourth step of determining whether program data of the track to be reproduced is stored in the memory when a track play key signal is input; If the program data of the track to be reproduced is stored in the memory, the program data stored in the memory is output. If the program data of the track to be reproduced is not stored in the memory, the program data is reproduced from the disc. A fifth step; In the first step, if the program data recorded on the disk is stored in the memory, characterized in that it comprises a sixth step of reproducing the program data stored in the memory.

Description

How to play data on optical disc system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data reproducing method of an optical disc system. In particular, after a high-capacity memory is built into an optical disc system, program data of a predetermined track is stored in a memory, and then the data reproducing method can be reproduced faster by utilizing the same. It is about.

In general, since an optical disc system reproduces program data recorded on a disc in a non-contact manner by light and processes the digital signal, random access based on a non-contact reproducing method is improved, with performance improvement that is difficult to realize in an existing analog recording / reproducing system. The operability such as access) and program playback can be improved.

1 shows the overall configuration of such an optical disc system.

In FIG. 1, the program data is recorded on the disk 100, and the optical pickup unit 110 reads the program data recorded on the disk in a non-contact manner, and converts the program data into an electric pre-electrical RF signal to provide the amplifier 120. .

The amplifier 120 amplifies the RF signal input from the optical pickup unit 110 and provides it to the digital signal processor 130. The digital signal processor 130 records, demodulates, and deinterleaves the input RF signal. In addition, descrambling is performed and provided to the MPEG (Motion Picture Expert Group) decoder 140, while subdata including time information is detected and provided to the system controller 150.

The MPEG decoder 140 demodulates the data input from the digital signal processor 130 based on the MPEG demodulation scheme, and then outputs the video data to the video output terminal and the audio data to the audio output terminal. The system controller 150 also controls the playback operation of the optical disc system.

Meanwhile, the servo unit 160 controls various servo operations. For example, a focusing servo, a tracking servo, an optical system servo, and an APC (Automatic Power Control) servo may be representative servo functions. have.

Here, the focusing servo described above tracks the track of the disc 100 while the optical pickup unit 110 performs non-contact reproduction of the track of the disc 100 so that the track surface of the disc 100 is always the optical pickup unit 110 even when the disc 100 vibrates. Servo function to control the position within the depth of focus of the laser beam generated in the), tracking servo may be a function that controls the optical pickup unit 110 to trace along the track center of the disk (100).

In addition, the optical system servo serves to move the entire optical pickup unit 110 in a radial direction, and the APC serves to maintain a constant amount of reflected light of the laser beam on the disk 100.

In the optical disk system configured as described above, in order to reproduce the program data recorded on the disk 100, the read operation of the optical pickup unit 110, the signal processing operation of the digital signal processing unit 130, and the servo unit 160 Since various operations, such as servo operation, must be accompanied, the reproduction process is complicated, and consequently, it acts as a factor to slow down the reproduction processing speed.

On the other hand, according to the recent trend, due to the development of the memory field, a high-capacity memory chip is being developed, and such a high-capacity memory is used as an information storage medium in each field.

Accordingly, the present invention utilizes a high capacity memory to store predetermined program data among the program data reproduced from the disc in a high capacity memory, and utilizes it when necessary, thereby reproducing data of an optical disc system that can perform faster playback. The purpose is to provide a method.

In order to achieve the above object, the present invention provides a data reproducing method of an optical disc system having a high capacity memory divided into a plurality of memory areas for storing program data in track units, and reproducing program data recorded on a disc. A first step of determining whether or not the program data recorded on the disk is stored in the memory when the disk is mounted, determining the ID of the mounted disk; In the first step, if the program data recorded on the disc is not stored in the memory, the program data of the disc is reproduced, and when a key signal for storing the program data of the selected track is input, A second step of determining an ID and a track number of the selected track; A third step of reproducing program data of the selected track from the disc and storing the program data in a pre-allocated memory area of the memory; A fourth step of determining whether program data of the track to be reproduced is stored in the memory when a track play key signal is input; If the program data of the track to be reproduced is stored in the memory, the program data stored in the memory is output. If the program data of the track to be reproduced is not stored in the memory, the program data is reproduced from the disc. A fifth step; In the first step, if the program data recorded on the disk is stored in the memory, characterized in that it comprises a sixth step of reproducing the program data stored in the memory.

1 is a block diagram of a conventional optical disc system.

2 is a block diagram of an improved optical disc system for performing the data reproducing method of the present invention.

3 is a detailed flowchart of a data reproducing method according to a preferred embodiment of the present invention.

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

100; Disk 110; Optical pickup unit

120; Amplification unit 130; Digital signal processor

140; MPEG decoder 150; System control

160; Servo unit 210; Memory

220; OSD

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

2 shows an improved optical disc system for carrying out the data reproducing method of the present invention.

The optical disc system of FIG. 2 is configured by further adding a high capacity memory 210 and an OSD unit 220 to the optical disc system of the prior art shown in FIG. 1, and the high capacity memory 210 includes a program reproduced from a disc. The data is saved. In addition, the memory 210 is allocated a memory area in units of tracks so that the program data of a plurality of tracks can be distinguished and stored, and the OSD unit 220 displays a screen for playback selection as an OSD.

Therefore, hereinafter, the same constituent members performing the same functions as those of FIG. 1 are denoted by the same reference numerals for clarity.

3 shows a detailed flowchart of a data reproducing method according to a preferred embodiment of the present invention, and the data reproducing method according to the embodiment of the present invention is performed based on the improved optical disc system shown in FIG.

2 and 3, when the disk 100 is mounted in the optical disk system (S1), the optical pickup unit 110 reads TOC (Table Of Content) data contained in the lead-in area of the disk 100 to amplify the amplifier. And the amplification unit 120 amplifies it and provides it to the digital signal processing unit 130. The TOC data via the digital signal processing unit 130 is input to the system control unit 150 to be supplied to the system control unit 150. ) Is stored in the internal memory (S2).

Thereafter, the system controller 150 determines the ID (Identifier) of the mounted disk 100 based on the TOC data (S3), and the program data of the currently mounted disk 100 is stored based on the determined ID. It is searched whether it is already stored in 210 (S4).

As a result of the search, if the program data of the currently loaded disk 100 is not already stored in the memory 210, the standby state is maintained (S5), and the user uses the key input terminal (not shown) to play the playback key. When the signal is provided to the system controller 150 (S6), the system controller 150 controls the system to allow the system to operate in the playback mode (S7). Therefore, the optical pickup unit 110 reads the program data recorded on the disk in a non-contact manner, and then converts the program data into an electric RF signal to provide it to the amplifier 120.

The amplifier 120 amplifies an RF signal input from the optical pickup unit 110 and provides the digital signal to the digital signal processor 130. The program data via the digital signal processor 130 is provided to the MPEG decoder 140. The video data is output to the video output terminal and the audio data is output to the audio output terminal.

On the other hand, if the user provides the storage key signal to the system control unit 150 through the key input terminal during the operation in such a playback mode (S8), the system control unit 150 is the ID and track number of the disc 100 currently being played. And store the corresponding track number in the internal memory (S9, S10), allocate an area of the memory 210 for storing the program data of the current track (S11), and then control the digital signal processor 130. The output of the digital signal processor 130 is simultaneously output to the MPEG decoder 140 and the memory 210.

Therefore, program data of a predetermined track via the digital signal processor 130 is input to the MPEG decoder 140 and stored in an allocated area of the memory 210 (S12).

In this way, while the program data of the predetermined track is stored in the allocated area of the memory 210, the playback of the current track ends (S13), and when the playback of the next track starts, the system controller 150 determines the next track number. And store the track number in the internal memory (S14), allocate an area of the memory 210 to store the program data of the next track, and then control the digital signal processor 130 to control the digital signal processor 130. The output of the data is simultaneously output to the MPEG decoder 140 and the memory 210, so that the data of the program of the next track is stored in a predetermined area of the memory 210 (S11 and S12).

On the other hand, if the user provides the storage end key signal to the system control unit 150 while storing the program data in the memory 210 (S15), the system control unit 150 controls the digital signal processing unit 130, The output of the signal processor 130 is blocked to flow into the memory 210 (S16).

In this manner, program data of a predetermined track is stored in the memory 210.

Therefore, when the user provides the system control unit 150 with a key signal for selecting a predetermined track using the key input terminal (S17), the system control unit 150 programs the selected track based on the track number stored in the internal memory. It is determined whether the data is stored in the memory 210 (S18), and if the program data of the selected track is stored in the memory 210, the program data stored in the disk 100 is not reproduced, but in the memory 210. The MPEG decoder 140 is controlled to reproduce the stored data 210 (S19).

Therefore, the MPEG decoder 140 reads out the program data stored in the memory 210 and demodulates it according to the MPEG demodulation scheme, and then outputs the video data to the video output terminal and outputs the audio data to the audio output terminal.

On the other hand, if the program data of the selected track is not stored in the memory 210, the system control unit 150 controls the system so that the program data recorded on the disk 100 is reproduced (S20).

Based on this operation, the optical disc system stores the program data of the track selected by the user in a high capacity memory, and then outputs the program stored in the memory by MPEG decoding instead of replaying the program. After the same process, if a playback end key signal is input (S21), playback ends (S22).

On the other hand, as a result of the determination in step S4, if the program data of the currently loaded disk 100 is already stored in the memory 210, the system control unit 150 controls the OSD unit 220, and recorded on the disk 100 A screen for selecting whether to play the program data or the program data stored in the memory 210 is displayed (S23).

For example, if the user wants to reproduce the program data recorded on the disc 100 (selection using a key input terminal) (S24), the system control unit 150 allows the process of S7 and the following to be performed, but the user may perform the memory. If the program data stored in 210 is desired to be reproduced (S24), the system controller 150 controls the MPEG decoder 140 to control the program data stored in the memory 210 to be sequentially reproduced (S25).

Therefore, the MPEG decoder 140 reads out the program data stored in the memory 210 and demodulates it according to the MPEG demodulation scheme, and then outputs the video data to the video output terminal and outputs the audio data to the audio output terminal.

As described above, the present invention stores the program data of the track selected by the user in a high-capacity memory, and then outputs the program data stored in the memory by MPEG decoding instead of replaying the program. There is an improvement effect.

Claims (1)

A data reproducing method of an optical disc system having a high capacity memory divided into a plurality of memory areas for storing program data in track units, and reproducing program data recorded on a disc: A first step of determining whether or not the program data recorded on the disk is stored in the memory when the disk is mounted, determining the ID of the mounted disk; In the first step, if the program data recorded on the disc is not stored in the memory, the program data of the disc is reproduced, and when a key signal for storing the program data of the selected track is input, A second step of determining an ID and a track number of the selected track; A third step of reproducing program data of the selected track from the disc and storing the program data in a pre-allocated memory area of the memory; A fourth step of determining whether program data of the track to be reproduced is stored in the memory when a track play key signal is input; If the program data of the track to be reproduced is stored in the memory, the program data stored in the memory is output. If the program data of the track to be reproduced is not stored in the memory, the program data is reproduced from the disc. A fifth step; And the sixth step of reproducing program data stored in the memory, if the program data recorded on the disk is stored in the memory in the first step.