KR100303654B1 - How to handle errors in recording of optical record carriers and how to play back optical record carriers recorded by this method - Google Patents

Abstract

By storing the data and address of the block in which the recording error occurs in a separate area of the optical recording medium and performing recording up to the recording end address regardless of the block in which the error occurred, the space of the optical recording medium is used to the maximum, and an error occurs. Even if the recording operation of the optical recording medium drive that can complete recording in one recording operation is provided.

The present invention relates to a recording error processing method of an optical recording medium drive including a read in area, a program area, and a read out area: in units of blocks according to a data write command. Records the data on the optical recording medium, checks whether a recording error occurs while recording the data in block units, and if a recording error occurs in the optical recording medium, the block information in which the recording error has occurred is read in the lead-out area of the optical recording medium. When the block information is recorded in the lead-out area, recording is performed on the optical recording medium from the block in which the recording error occurs.

Description

Method of handling recording error of optical record carrier and method of reproducing optical record medium recorded by this method

The present invention relates to a recording error processing method of an optical recording medium drive, and a method of reproducing an optical recording medium recorded by the method. More particularly, the data and address of a block in which an recording error occurs in the optical recording medium drive are separated. By recording in the area, the recording error processing method of the optical recording medium drive, which allows recording to continue regardless of an error block even if an error of the recording error occurs, and the recording error is processed and recorded by the same method. It relates to a regeneration method.

Representative methods of reproducing recorded information include magnetic and light. The magnetic method refers to a method of detecting information on an arrangement of polarities of magnetic materials applied to a magnetic medium and reproducing information according to the polarity (or phase). The recording and reproducing operations are free from the use of magnetic materials. It has the advantage.

On the other hand, the light-based method refers to a method of scanning light onto a recording surface of a recording medium and reproducing information by detecting a state of diffuse reflection by a pit processed on the recording medium. In terms of processing, the information preservation efficiency is very good.

Representative recording media using optical methods include compact disk-read only memory (CD-ROM) and digital versatile disk-read only memory (DVD-ROM). Among such optical recording media, a lot of information is stored in the CD-ROM of about 700 megabytes (MByte) per sheet.

A typical optical record carrier has a plurality of sectors radially partitioned on a disk-shaped storage medium, and a plurality of tracks divided into concentric circles for each sector. The optical recording medium is rotated at an average speed of approximately 720 rpm, and reproduced in a concentric manner from the central portion of the optical recording medium to the outer diameter by the optical reproducing apparatus.

Recently, not only a CD-ROM drive for playing optical recording media, but also a compact disk-recording (CD-R) drive having a single record or an optical disk recording / reproducing system CD-RW (Compact Disk-) capable of playing a plurality of recordings. Storage systems such as ReWritable drives are becoming commonplace.

1 is a block diagram showing a general optical disc recording and reproducing system.

A typical optical disc recording and reproducing system is as shown in FIG. When the data recording command is applied, as the data recording mode is set and video data and audio data are applied, the video encoder 100 and the audio encoder 101 After performing data encoding on the video data and the audio data, respectively, the data mixer 102 performs data encoding and storing the encoded video data and the audio data in the synthesized form. Data mixing is performed on video data and audio data. The mixed data is added with an address ID and an address ID parity on the disk 109 through a channel encoder 103, and is used for scrambling and error detection. After the data is added, the parity for data error correction is added and finally output after 8 / 16-value modulation. In this case, the data storage 110 is required to perform channel encoding.

The data bitstream output through the channel encoder 103 is not directly recorded on the disk 109, but is optically modulated by the laser power modulator 104 and the recording / playback switching unit ( As the 130 is switched to the recording mode, the output of the laser power modulator 104 is recorded on the disc 109 by the optical pickup device 105. The focusing / tracking control of the optical pickup device 105 is performed by the focusing / tracking servo unit 106 and the rotation control of the optical disc is controlled by the spindle servo unit 107 to control the spindle motor unit 108. Is made by.

On the other hand, during data reproduction, the data reproduction process is usually performed in the reverse order of the data recording process.

When a data reproducing command is applied, the recording / reproducing switching section 13 is switched to the reproducing mode and the optical pickup device 105 optically reads the data recorded on the disc 109. Accordingly, when the high frequency amplifier 111 amplifies the weak read signal output from the optical pickup device 105 with an appropriate gain, the channel decoder 112 performs a reverse process of the channel encoder 103. Error detection and correction are performed based on the set method, and 8-value / 16-value demodulation is performed.

Thereafter, when the data parser 113 separates the output of the channel decoder 112 into video data and audio data, the video decoder 114 and the audio decoder 115 separate the separated video data and the audio. Data decoding is performed on the data, respectively.

Accordingly, the television signal encoder 116 encodes the output of the video decoder 114 into a television video signal such as NTSC, PAL, SECAM, and the like, and displays the video signal through the monitor 118. The digital-to-analog converter 117 digitally / analogs the output of the audio decoder 115 and outputs the same through a speaker 119.

On the other hand, the area of the disk 109 is composed of three areas: a read in area (Read In Area), a program area (Program Area), and a read out area (Read Out Area).

The lead-in area records the contents of the disc, such as the address of the data recorded on the disc and the total time, and is also called a table of contents (TOC). The program area records the actual data, and the lead-out area signals the end of the program. Is in the area.

In addition, the central processing unit 120 cannot stop recording even if an error occurs while recording data on the disc 109. If a recording error error occurs and the recording is interrupted and the block in which the error occurs is seeked and rewritten, the position of the block in which the error occurs is not accurately seeked. Overlap with the recorded data occurs and an error occurs in the three blocks up to the front and rear blocks of the block in which the error occurs.

Because of this problem, the central processing unit 120 cannot stop recording in order to rewrite a block in which an error occurs by restarting when a recording error error occurs. Therefore, if a recording error occurs even once until the data is started to be recorded on disk 109 and completed, recording of new data is stopped and zero (0) is recorded up to the recording end address, and data is recorded up to the recording end address. When the recording is finished, an error occurrence of a recording error is transmitted to the host. 0 is filled with meaningless data to complete a series of write operations.

However, if a recording error occurs in such a conventional optical recording medium drive, 0 is recorded to the recording end address, and then the host is notified of the error of the recording error. Therefore, if an error of recording error occurs in the case of a CD-R drive having a write-once time, a fatal result is enough to throw away the disc, and a recording error occurs even in the case of a CD-RW drive capable of recording a large number of times. After deleting the recording of data, there is a problem that causes a waste of time since the recording operation of the data having a recording error has to be performed again from the beginning.

Accordingly, an object of the present invention is to solve such a problem, and an object of the present invention is to store data and an address of a block in which a recording error occurs in a separate area of the optical recording medium, and to the recording end address regardless of the block in which the error occurs. By performing the recording, it is possible to use the space of the optical recording medium to the maximum, and to provide a recording error processing method of the optical recording medium drive that can complete recording in one recording operation even if an error occurs.

1 is a block diagram showing a general optical recording medium recording and reproducing system.

2 is an operational flowchart for performing an optical recording medium recording error processing method according to the present invention;

Fig. 3 is an operational flowchart for reproducing an optical recording medium recorded according to the present invention.

4 is a view showing a program area of an optical recording medium in which a block in which a recording error occurs is stored.

5 is a view showing a lead out area of the optical recording medium according to the present invention;

FIG. 6 is a diagram illustrating an error block data area of the lead-out area of FIG. 5.

A feature of the present invention for achieving the above object is a recording error processing method of an optical recording medium drive including a read in area, a program area, and a read out area. A method of recording data, the method comprising: recording block data on an optical recording medium in accordance with a data recording command, checking whether a recording error has occurred during recording of block data, and when a recording error occurs on the optical recording medium, Recording address information of the block in which the error occurs, data of the block in which the error occurs, and data information of a block before and after the block in which the error occurs in the lead-out area of the optical recording medium; If the block information is recorded in the lead-out area, the step of recording the block information in the program area of the optical recording medium again is performed.

Preferably, the lead-out area includes an error address area for storing address information of an error block and an error block data area for storing data of an error block and data information of a block before and after an error block. It is characterized by including.

The method for reproducing an optical recording medium recorded by the method of the present invention comprises the steps of: retrieving address information stored in an error address area of a lead-out area when a reproducing command of data stored on the optical recording medium is applied; And comparing the retrieved address information with the retrieved address information, and if the address is the same, detecting the data corresponding to the address in the error block data area of the lead-out area.

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

FIG. 2 is a flowchart illustrating an operation of processing an optical recording medium recording error according to the present invention. FIG. 3 is a flowchart illustrating an operation of reproducing an optical recording medium recorded according to the present invention. FIG. 5 is a view showing a program area of an optical recording medium storing a block in which a recording error has occurred. FIG. 5 is a view showing a lead out area of the optical recording medium according to the present invention, and FIG. The figure which shows the error block data area of the lead-out area of is shown.

1 and 2, the recording error processing method of the present invention will be described. First, the central processing unit 120 checks whether a recording command for recording data from the host to the disk 109 is received (S201), When a data recording command is received, the data and the address of the data are recorded in the lead-in area and the program area in the area of the disk 109 (S202).

The central processing unit 120 checks whether the recording of the data has ended (S203). If the recording is finished, the central processing unit 120 ends the recording operation of the data (S204), and ends the program. Here, if the recording of the data has not been completed, it is checked whether an error of a recording error occurs in the recording process of the data (S205).

As a result of the check, if an error in recording error has occurred in the disc 109, the central processing unit 120 searches for an error address area designated in the lead-out area among the areas of the disc 109 (S206).

Herein, the configuration of the lead-out area in the area of the disk 109 will be described with reference to FIGS. 4 and 6.

The lead-out area is allocated for an area of 1 minute and 30 seconds for the first session and 30 seconds for the second session, but this area is used only as a signal area for indicating the end of the program. Therefore, it is a feature of the present invention to use this area as an error block and error address data storage location.

Therefore, in the present invention, the 30-second area of the lead-out area is 10 seconds as the area indicating the end of the program, 1 second as the error address area storing the address of the block in which the error occurs, and the block in which the error occurs and the block in which the error occurs. 19 seconds are allocated to the error block data area in which data of the previous and subsequent blocks is stored.

Here, since one second of the error address area is 75 blocks, assuming that one address of an error block is stored in one block, 75 error addresses can be stored per second.

In addition, according to the present invention, three data blocks must be stored for one error as shown in FIG. 4 in 19 seconds of the error block data area, and two blocks before and after the three data blocks are padded ( padding), so write seven blocks for one error. Therefore, since 19 seconds x 75 blocks = 1425 blocks and 1425 blocks ÷ 7 = 203, 203 errors can be recorded in the 19-second error block data area, but the number of addresses that can be stored in the error address area is 75. Only 75 x 7-525 blocks are used (see Figure 5).

In this case, in the present invention, the reason for storing not only the block in which the error occurs in the error block data area but also the block before and after the block in which the error occurs is that an error occurs when the address of the block in which the error occurs is recorded again. This is because duplication of data occurs if the starting position of the generated block is not accurately seeked. In addition, the reason for storing two padding blocks before and after three data blocks stored in the error block data area is that when an error occurs several times and continuously records three data blocks, To prevent duplication (see FIGS. 4 and 6)

Next, when the error address area is found in the lead-out area, the address of the block in which the error has occurred is stored in the error address area (S207), and the error block data area designated in the lead-out area of the disc is searched (S208).

The data corresponding to the seven blocks including the error block, three blocks before and after the error block, and two padding blocks before and after the error block are stored in a space where no data is recorded in the error block data area of the found lead-out area. (S209).

That is, two padding blocks → data corresponding to the previous block of the block in which the error occurred → data of the block in which the error occurred → data corresponding to the block after the block in which the error occurred → data corresponding to the seven blocks in the order of two padding blocks. Save the data.

Next, check whether or not the storage of the error data is completed in the error block data area of the lead-out area (S210). If the storage is completed, search for the address of the block in which the error has occurred (S211), and again from the block in which the error has occurred. The recording proceeds to the program area of the disc (S212).

like this. A method of reproducing a disk on which data recording error has occurred will be described in detail with reference to FIG.

First, the central processing unit 120 confirms whether a data playback command is received from the host (S301), and when the data playback command is received, searches for an error address area of the lead-out area of the disk 109, and records it on the disk. It is determined whether an error exists (S302).

If there is a recording error on the disc and the address of the block in which the error occurred is stored in the error address area, the address of the block in which the error has occurred is detected (S303), and the address of the disc requested for reproduction is compared with the detected address (S304). ).

As a result of the comparison, it is checked whether the same address as the address of the disc for which the reproduction is requested exists in the error address area (S305). If the same address exists, the error block data area of the lead-out area of the disc is searched (S306), and the reproduction requested Data corresponding to the address is detected (S307).

After transmitting the detected data to the host (S308), the CPU 120 checks whether another play command exists (S309), and if the play command exists, searching for an error address area of the lead-out area of the disc. If the reproducing command does not exist, the reproducing operation of the data is terminated (S310).

On the other hand, if the same address does not exist in the error address area in step 305 (S305) of checking whether the same address exists, the same address is detected in the lead-in area (S311), and the data corresponding to the detected address is stored in the program area. In operation S312, the method branches to step 308 (S308) of transmitting the detected data to the host.

Therefore, even if an error of recording error occurs on the disc, the recording operation can be continued, and data of a block in which an error of recording error occurs at the time of disc reproduction can be reproduced without overlap.

like this. In the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As described above, the recording error processing method of the optical recording medium drive according to the present invention has the following advantages.

If a recording error occurs in the optical recording medium drive, the recording error data is stored in a predetermined area and the recording operation is performed up to the recording end address. Therefore, the data where the recording error occurs is duplicated with previously recorded data and data is lost. Can be prevented, and even if an error of a recording error occurs, data can be recorded in one recording operation.

Claims (4)

A write error processing method of a drive of an optical recording medium including a read in area, a program area, and a read out area, the method comprising: writing data in block units according to a data write command Recording on the optical recording medium; Checking whether a recording error occurred while recording the data in the block unit; When the recording error occurs in the optical recording medium as a result of the check, the optical recording of the address information of the block in which the recording error occurs, the data of the block in which the error occurred, and the data information of a block before and after the block in which the error occurs Recording in the lead-out area of the medium; When recording of the address information of the block in which the error occurs and the data information of the block before and after the block in which the error occurs in the lead-out area is completed, the data is written back to the program area of the optical recording medium from the block in which the recording error occurs. The recording error processing method of the optical recording medium drive comprising the step of performing. (delete) The readout area of claim 1, wherein the lead-out area includes an error address area storing address information of the block in which the error occurs, data of the block in which the error occurs, and data information of a block before and after the block in which the error occurs. And an error block data area for storing the recording error of the optical recording medium drive. A method of reproducing an optical recording medium recorded by the method of any one of claims 1 to 3, wherein when a reproducing command of data stored in the optical recording medium is applied, address information stored in an error address area of the lead-out area. Searching for; Comparing address information of the disc for which reproduction is requested with the retrieved address information; And detecting the data corresponding to the address in the error block data area of the lead-out area if the address is the same as the result of the comparison.