KR100565661B1 - Writing method of optical disc - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording method, and more particularly, to an optical disc recording method which performs recording continuously even when recording fails during optical disc recording, and obtains a gain for the recordable capacity of the optical disc. According to the present invention, receiving recording data from an external host and recording the data onto an optical disc, if recording failure occurs during the recording, recording the location information of the recorded area, and using the location information of the recorded area. Recognizing the recorded area and re-recording the data continuously from the next area of the recorded area so that the recording is interrupted due to a recording interruption or a recording failure factor at the request of the user. Since the disk is recognized as a recordable disk afterwards, it is effective to improve optical disk recording efficiency and stability.

Optical Disc Recording Method, MSF, Lead-In, Lead-Out, Buffer Underrun

Description

Optical disc recording method {Writing method of optical disc}

1 is a view showing a disk surface recorded by a multi-session recording method according to the prior art;

2 is a block diagram showing the structure of an optical disc recording and reproducing apparatus according to the present invention;

3 is a flowchart showing an optical disc recording method according to the present invention;

4 is a view showing the surface of a disc rewritten after a recording failure according to the optical disc recording method according to the present invention;

-Explanation of symbols for the main parts of the drawing-

100: optical disc recording and playback section 110: pickup section

120: buffer 130: data processor

140: Servo 200: Host

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording method, and more particularly, to an optical disc recording method which performs recording continuously even when recording fails during optical disc recording, and obtains a gain for the recordable capacity of the optical disc.

If the recording is interrupted by the user's request during recording of data on the optical disc using conventional optical disc recording applications (ex. Nero, Roxio, Record now, etc.) or the final recording fails due to a phenomenon that may cause the recording failure. In the case where the optical disc is a CD-R that can be recorded once, it can no longer be used. In the case where a CD-RW that can be recorded several times can be used again after erasing, the trouble of having to write the same data again is caused.

In addition, the Multi-Session recording method (SAO: Session At Once), which has conventionally recorded a small amount of data on a CD-R by performing a plurality of recording operations on one disc and recording the session in several sessions, leads in each session. -in) and lead-out, the larger the number of sessions, the more the lead-out area where no actual data is recorded. As a result, the recordable capacity of the disc is consumed. This will be described with reference to FIG. 1.

1 is a view showing a disk surface recorded by a multi-session recording method according to the prior art.

As shown in Fig. 1, when recording a plurality of sessions on an optical disc, a lead-in area including information on a disc or session and information on a track which is a user data recording area, a track area on which actual user data is recorded, In addition, an area divided into a lead-out area in which recording completion information is recorded is generated as many as the number of sessions.

As a result, the number of lead-out areas where no actual data is recorded is increased, thereby reducing the recordable capacity of the disc.

Accordingly, an object of the present invention is to solve the problems of the prior art, and when a recording is interrupted due to a recording interruption or a recording failure factor due to a user's request, the recording disk is not a recording failure disk but is additionally recordable. Disclosed is an optical disk recording method for recognizing an optical disc.

The optical disk recording method according to the present invention for achieving the above object, receiving the recording data from an external host to record on the optical disk, and if the recording failure occurs during the recording, recording the location information of the recording area And recognizing the recorded area using the position information of the recorded area, and rewriting data continuously from the next area of the recorded area.

The location information is characterized in that the MSF (Min, Sec, Frame) indicating the time and frame information.

The lead-in area is recorded in the rewritten proxy, and the MSF value included in the lead-in area maintains continuity with the MSF value of the recorded position.

Determining whether the recording failure is due to a user's request when a recording failure occurs during the recording; and checking the number of buffer underruns generated when the recording failure is not due to a user's request, Characterized in that the step further comprises the step of checking whether exceeds a predetermined allowance.

Hereinafter, a configuration and an operation according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 2 is a block diagram showing the internal structure of the opticalsk recording and reproducing apparatus according to the present invention.

As shown in FIG. 2, the optical disc recording and reproducing apparatus according to the present invention includes a recording and reproducing unit 100 which performs recording and reproducing on an optical disc, and an external host 200 such as a personal computer (PC) controlling the same. .

The host 200 issues a recording or reproducing command to the recording / reproducing unit 100 in a specific area, and the recording / reproducing unit 100 performs recording and reproducing to a specific area according to the command of the host 200. do.

The recording and reproducing unit 100 specifically includes a pickup unit 110 for directly recording or reproducing data on an optical disc, and receiving a reproduction signal from the pickup unit 110 to restore a desired signal value or to record the data. A data processor 130 for modulating and transmitting a signal to a signal recorded on an optical disc, and a servo unit for controlling the pickup unit 110 to accurately read a signal from the optical disc or to accurately record a signal on the optical disc. 140, the buffer 120 storing the data to be recorded transferred from the host 200 or the reproduction signal restored by the data processor 130, and controlling the internal configuration blocks of the recording and reproduction unit 100. It is composed of a microcomputer 150 in charge.

The recording method during the operation of the optical disk recording / reproducing apparatus configured as described above will be described with reference to FIG. 3, which is a flowchart showing the optical disk recording method according to the present invention.

First, when an optical disc is loaded into the optical disc recording and reproducing unit 100, all management information in the optical disc is read out and temporarily stored in the buffer 120 in the recording and reproducing unit 100, and these management information is stored in the optical disc. It is utilized during the recording.

On the other hand, when the host 200 desires to record in a specific area of the optical disc, the host 200 transmits the recorded information to the record reproducing unit 100 along with data to record the position information of the desired area to be recorded.

After receiving the recording command, the microcomputer 150 in the recording and reproducing unit 100 records the recording data stored in the buffer 120 on the optical disc with reference to the read management information (S10). The method uses known techniques such as Disc At Once (DAO), Track At Once (TAO), and Session At Once (SAO).

During the recording as described above, the recording may fail due to a user request or a reason that may cause the recording to fail.

For example, an interruption may occur due to the interruption of data transmission from the external host 200 or the multi-task or communication task of the host 200 during the recording failure.

If the recording of the optical disc fails due to these factors, a check is made to determine whether the cause of the recording failure is at the request of the user (S20). This confirmation is made by the microcomputer 150 of the recording / reproducing unit 100.

As a result of the check, if the cause of the recording failure is not at the request of the user, the number of occurrences of the buffer underrun is examined (S30).

In order to describe the buffer underrun, first, the optical disc recording and reproducing unit 100 looks at the process of recording data on the disc in more detail. The optical disc recording and reproducing unit 100 receives data to be recorded from the host 200. The data is stored in the buffer 120, and when the data is stored in the buffer 120, the stored data is recorded on the disk. In this case, since the capacity of the data transmitted from the host 200 is much larger than that of the buffer 120, the recording and playback unit 100 records the data transmitted from the host 200 in the buffer 120. And write the data recorded in the buffer 120 to the optical disc.

While performing the data recording operation, the transmission of data may be interrupted or delayed due to the above-described recording failure factor from the host 200. In this case, no further data is stored in the buffer 120. Otherwise, since the data storage operation is delayed, the optical disc recording / reproducing unit 100 records all the data already stored in the buffer, thereby causing a buffer underrun in which the buffer 120 is empty. In addition, the buffer underrun may occur even when the data recording speed of the optical disc recording / reproducing unit 100 is faster than the data transmission speed of the host 200.

If a buffer underrun occurs due to a recording failure factor as described above, the number of occurrences of the buffer underrun is counted by the microcomputer 150 in the optical disc recording / reproducing unit 100 to check whether the occurrence number exceeds a preset allowable value. (S40)

If the number of occurrences of the check results does not exceed the allowable value, this means that there is no abnormality and the optical disc recording operation is continued (S50). This is handled in the same manner as in the case where a recording interruption has occurred.

Therefore, if a recording stop occurs due to a user's request, or if the buffer underrun exceeds the allowable value due to a recording failure factor or the like, the MSF (Min, Sec) of the recorded position is located in the next region of the region where the recording is completed according to the present invention. , Frame) (S60).

That is, when the number of occurrences of the buffer underrun exceeds the allowable value frequently, the MSF, which is the last position information on the track which has been recorded before reporting the recording failure, is immediately recorded in the next area of the recorded area, When there is a request to stop recording, the MSF, which is the position information of the track which is normally recorded, is recorded in the next area of the completed recording area before the recording ending process is performed.

In this case, the next area after the recorded area means the same position as the area to be read-out in the conventional multi-session recording method (SAO).

On the other hand, when recognizing and recording a disc on which MSF information is recorded by the method according to the present invention described above, the MSF for each track is provided through table of contents (TOC) information included in a lead-in area. Then, the position of the recorded track is recognized with reference to the MSF information of the recorded position, and data is continuously recorded from the next region of the MSF of the failed recording position (S70).

When rewriting is started after such a recording failure, recording is started from the lead-in area. This is to add changed TOC information, etc., and the MSF value recorded in the TOC area is recorded as the value added to the MSF value of the previously recorded track to maintain the continuity of the MSF value.

4 shows the surface of a rewritable disc after a recording failure according to the optical disc recording method according to the present invention.

As shown in Fig. 4, the surface of the optical disc includes a lead-in area including information on a disc or session and track information, a track area on which actual user data is recorded, and position information recorded normally before recording stops. The MSF area is divided into a lead-out area in which recording completion information is recorded, and the MSF area according to the present invention is generated by the number of times of failed recording.

The MSF area has a much smaller area than the lead-out area (1 minute 30 seconds recording completion signal, 1 minute 30 seconds in case of multi session, 30 seconds later) recorded according to the conventional multi-session recording method (SAO). As a result, they benefit from the capacity of the disk.

On the other hand, in order to read and play back a disc whose rewriting has been completed by the capacity allowed by the disc after the recording failure by the method according to the present invention, the lead-in information of the appended data and the MSF, which is the minimum position information, are respectively recorded. Collect and play the correct information about the track.

As described above, the optical disc recording method according to the present invention has the following effects.

First, when recording is interrupted due to a recording interruption or a cause of failure by a user's request, the MSF information of the recording stop position is recorded so that it is recognized as a recordable disk instead of a recording failure disk. It has the effect of improving stability.

Second, by utilizing the optical disc consumed due to a failed recording or the lead-out area that has been consumed in a multi-session recording method, there is an effect in that the capacity of the disk is utilized.

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 examples, but should be defined by the claims.

Claims (4)

Receiving recording data from an external host and recording the data on an optical disc; If a recording failure occurs during the recording, recording the position information of the recorded area in the next area of the recorded area; And recognizing the recorded area using the location information of the recorded area, and continuously rewriting data from the next area of the area where the location information is recorded. The method of claim 1, And the position information is an MSF (Min, Sec, Frame) indicating time and frame information. The method of claim 2, And the MSF value included in the lead-in area is maintained in the rewritten proxy, and the MSF value contained in the lead-in area maintains continuity with the MSF value of the recorded position. The method of claim 1, If a recording failure occurs during the recording, determining whether the recording failure is at the request of a user; And if the recording failure is not at the request of a user, checking the number of buffer underruns generated and checking whether the number exceeds a predetermined allowable value.

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