KR19980075511A - Data recording method in optical disc play system - Google Patents

Abstract

The present invention relates to a data recording method capable of recording data without changing the recording and erasing prevention information recorded in the track in which the recording and erasing prevention mode is set in the optical disc play system. If the mode is set, it is checked whether a user TOC exists among information read out in the lead-in area; If the user TOC exists, it is checked whether there is write and erase mode prevention information in the TOC; Check whether to ignore both the recording and erasing mode prevention information if the recording and erasing mode prevention information is present; If recording and erasing mode prevention information is not ignored, it is checked whether recording processing is to be performed only for a portion of the track existing on the optical disc to allow recording and erasing modes; If the recording process is not performed even for the allowed portion, the recording operation is terminated; When the user TOC does not exist, the record and erase mode protection information does not exist, or the record and erase mode protection information is ignored, all the tracks on the optical disc are set to a range in which the user can record a desired program. and; In the case where the recording process is to be performed only for the allowable part, the recording process is performed by setting only the part of the track on the optical disc to which the recording and erasing mode is allowed to be recorded in a range in which a user can record a desired program. It features.

Description

Data recording method in optical disc play system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method in an optical disc play system, and more particularly, to a data recording method in accordance with recording and erasing mode prevention information in an optical disc play system capable of repeatedly recording and erasing a mounted optical disc.

At present, the optical disc play system has been able to reproduce and record and erase a number of times as well as to reproduce the mounted optical disc. However, in an optical disc play system capable of repeating recording and erasing, in order to prevent important data from being lost during recording or erasing mode, recording and erasing of special information for preventing the recording mode or erasing mode from being performed in a specific area of the track. Mode protection has been proposed. However, a track in which information for preventing the recording and erasing modes is recorded by the proposed recording and erasing mode prevention function cannot record any other data until the prevention information is changed to the allowable information. As a result, when new data is to be recorded on the track on which the prevention information is recorded, it is troublesome to perform the above recording and erasing mode prevention function to record the allowable information in a specific area in which the prevention information is recorded.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks, and provides a data recording method capable of recording data without changing the recording and erasing prevention information recorded in the track in which the recording and erasing prevention mode is set in the optical disc play system. The purpose is to provide.

In order to achieve the above object, the data recording method according to the present invention is an optical disc play system capable of recording, erasing, and reproducing an optical disc, wherein the operating environment of the system is set by reading a lead-in area of the optical disc. A first checking step of checking whether a user TOC exists among information read out in the lead-in area when the recording mode is set; A second checking step of checking whether there is write and erase mode prevention information in the TOC when the user TOC exists as a result of performing the first checking step; A third checking step of checking whether to ignore the recording and erasing mode prevention information if the recording and erasing mode prevention information exists as a result of performing the second checking step; A fourth check step of checking whether or not to perform recording processing only for a portion of the track existing on the optical disc where the recording and erasing mode is allowed unless the recording and erasing mode prevention information is ignored as a result of performing the third checking step; Terminating the recording operation in the case where the recording process is not performed on the allowable portion as a result of performing the fourth checking step; If the user TOC does not exist as a result of performing the first check step, or if the recording and erasing mode prevention information does not exist, or if the recording and erasing mode prevention information is ignored, the presence of the user TOC is present on the optical disc. A first recording step of setting all tracks in a range in which a user can record a desired program and performing recording processing; As a result of performing the fourth check step, when the recording process is to be performed for only the allowable portion, the recording process is performed by setting only the portion of the track on the optical disc to which the recording and erasing mode is allowed to be recorded in a range in which the user can record a desired program. And a second recording step.

1 is a schematic block diagram of an optical disc play system for performing a data recording method according to the present invention;

2 is a flowchart of a data recording method according to the present invention;

3 is a Q-channel configuration diagram.

Explanation of symbols for main parts of the drawings

100: optical disk 110: key input unit

120: control unit 130: servo unit

140: playback signal processor 150: sub-coding detector

The above and other 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.

Hereinafter, an embodiment of the present invention for achieving the above object in detail.

1 is a schematic block diagram of an optical disc play system for performing a data recording method according to the present invention, which includes an optical disc 100, a key input unit 110 for applying a user's command, and a control unit for controlling overall functions ( 120, the servo unit 130 controlled by the control unit 120 and driven to record or reproduce predetermined information on the optical disc 100, and the waveform shaping and digital signals when information picked up from the servo unit 130 is transmitted. By the processing, the general data is transmitted to the decoder not shown, and the special information is composed of the reproduction signal processing unit 140 which transmits to the control unit 120.

2 is a flowchart of a data recording method according to the present invention.

Next, the operation of the flowchart shown in FIG. 2 will be described in detail with reference to FIG. 1.

First, in operation 201, the controller 120 controls the servo unit 130 to read out a lead-in area of the mounted optical disc 100. When the read information is transmitted to the control unit 120 through the reproduction signal processing unit 140, the control unit 120 proceeds to step 202 to set the operating environment of the system using the information read from the lead-in area. When the recording mode setting command is applied through the key input unit 110 while the operation environment is set as described above, the controller 120 proceeds to step 204 via step 203.

In operation 204, the controller 120 checks whether a user table of content (TOC) exists in the lead-in area read in operation 201. The TOC consists of information such as the number of songs stored on the disc, the start and total time of each song, and the address of the first part and the index part of each song in the form of a table. The information stored is called a user TOC. If the user TOC does not exist as a result of the check in step 204, the controller 120 proceeds to step 205.

In step 205, a program (or data) that the user wants to record is recorded on the desired track. When the recording of the program is completed, the controller 120 proceeds to step 206 to record information about the currently recorded program in the lead-in area of the optical disc 100, and proceeds to step 207.

In step 207, the controller 120 checks whether or not recording and erasing protection has been requested by the user for the currently recorded program. As a result of the check, in step 208, the control field of the Q channel existing on the track on which the program is recorded is searched for, thereby preventing recording and erasing mode prevention information (01X0 in this embodiment). .) And finish the operation. However, if the check in step 207 indicates that recording and erasure prevention is not required, the recording operation ends immediately. In this case, the Q channel carrying the recording and erasing mode prevention information is present in a sub-coding area allocated per frame, and defines the type or function of information to be loaded on the track as in the present embodiment. Information is recorded. As shown in FIG. 3, the Q channel has a 2-bit sync (S0, S1) field, a 4-bit control field, a 4-bit address (ADR) field, and a 72-bit data field (DATA). -Q) consists of a 16-bit CRC field. In particular, the contents of the disc are recorded in POINT, PMIN, PSEC, and PFRAME in the data field. POINT indicates track number and lead-in / out track, and PMIN, PSEC, PFRAME indicates minutes, seconds, and frames. MIN, SEC and FRAME indicate the travel time across the disc. This embodiment exemplifies a case where the recording and erasing mode prevention information is recorded in the control field of the Q channel information composed of 98 bits as described above.

On the other hand, when the check result of step 204, the user TOC is present in the information read in step 201, the control unit 120 proceeds to step 209. In step 209, the controller 120 checks whether there is write and erase prevention information in the user TOC information. If the check result recording and erasure prevention information does not exist, the flow advances to step 205 to perform the recording process as described above. However, if the check result of step 209 indicates that the write and erase protection information exists, the flow advances to step 210 to check whether the write and erase protection state is to be ignored. In this case, the check may be implemented by analyzing the key information input through the key input unit 110 after the controller 120 floats a corresponding message indicating whether to ignore the user.

As a result of the check in step 210, when the recording and erasing protection state is ignored, recording processing can be performed for all tracks of the optical disc 100. FIG. Therefore, the flow advances to step 205 to perform the recording process as described above. However, if the recording and erasing prevention state is not ignored, the flow proceeds to step 211. In step 211, the controller 120 checks whether or not to perform recording processing only for a portion allowing the recording and erasing modes. The check made in step 211 may also be implemented in a similar manner to the check made in step 210. That is, the control unit 120 outputs a message about whether to perform recording processing only for a portion allowing the recording and erasing mode so that the user can recognize the key, and the user applies the key through the key input unit 110 to the output message. By analyzing the information.

As a result of the check in step 211, when only the recording and erasing mode allowable portion is recorded, the process proceeds to step 205 to perform the recording process as described above. However, the track on the optical disc 100 that can be used at this time is limited to not having recorded and erased mode prevention information loaded thereon. Therefore, when the track designated during the recording process is loaded with the recording and erasing mode prevention information, a jump process is performed. However, if the check result of step 211 does not perform the mode of recording only the allowed portion, the flow proceeds to step 212 to perform the tray open mode and terminate the recording operation.

As described above, the present invention provides a method for recording data without changing information on a track when there is a track on which the recording and erasing mode prevention information is loaded on the mounted optical disc in the optical disc play system. There is an effect of facilitating data recording on tracks in which recording and erasing mode prevention information is recorded.

Although the present invention has been described as the above-described embodiment, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (3)

In an optical disc play system capable of recording, erasing and playing back an optical disc, A first checking step of checking whether there is a user TOC among information read out of the lead-in area when the recording mode is set by the user after the operating environment of the system is set by reading the lead-in area of the optical disc; A second checking step of checking whether there is write and erase mode prevention information in the TOC when the user TOC exists as a result of performing the first checking step; A third checking step of checking whether to ignore all of the recording and erasing mode prevention information if the recording and erasing mode prevention information exists as a result of performing the second checking step; As a result of performing the third check step, if the record and erase mode prevention information is not disregarded, a fourth check for checking whether to perform recording processing only for a portion of the track existing on the optical disc to which the record and erase mode is permitted. step; Terminating a recording operation if a recording process is not performed on the allowable portion as a result of performing the fourth check step; As a result of performing the first check step, the user TOC does not exist, or as a result of performing the second check step, the write and erase mode protection information does not exist, or as a result of performing the third check step, all of the write and erase mode prevention information are ignored. A first recording step in which all tracks existing on the optical disc are set in a range in which a user can record a desired program and performing a recording process; As a result of performing the fourth check step, when the recording process is to be performed only for the allowable portion, only the portion of the track existing on the optical disk to which the recording and erasing mode is allowed is set in a range in which the user can record a desired program. And a second recording step for processing. The recording and erasing mode according to claim 1, wherein the data recording method comprises: in a control field of a Q channel existing on a corresponding track on which data is recorded at the request of a user after performing the first recording step or the second recording step. And recording the prevention information. The data recording method as claimed in claim 1, wherein the recording operation is terminated in a tray open mode before the recording operation is terminated.