KR20070090456A - Method for controlling the recording operation of optical disc write once - Google Patents

Abstract

A method for controlling the recording of a disposable optical disc is provided to record temporary video manager information for video data recorded in a data block, thereby enabling a user to search for temporary video manager information recorded before recording failure easily when the recording failure occurs during data recording on the disposable optical disc. Video data related to a tile are recorded on a disposable optical disc corresponding to a recording command(S220). It is determined whether a recording position is a specific position if the video data are recorded(S240). Video title set information and temporary video manager information are created with respect to the recorded data if the recording position is the specific position(S260,S270).

Description

Method for controlling the recording operation of optical disc write once}

1 is a schematic block diagram of an optical disc recording apparatus according to a preferred embodiment of the present invention;

2 is a diagram for explaining a data recording structure according to the present invention;

3 is a flowchart for explaining a recording control method of an optical disc of write once type according to the present invention, and

4 is a flowchart illustrating a method of operating when a write fails while performing a data write operation according to the present invention.

Explanation of symbols on the main parts of the drawings

100: optical disc recording device 110: DSP

120: channel bit encoder 130: optical drive unit

140: optical pickup 150: R / F unit

160: servo unit 170: motor driving unit

180: system control unit

The present invention relates to a recording control method for a write once optical disc, and more particularly, to information about a previously recorded title when a recording failure occurs while recording data onto a write once optical disc. The present invention relates to a recording control method which can prevent the case where the entire disc cannot be played back because it becomes impossible.

In general, CDs and DVDs are widely used as optical recording media capable of recording and storing digital audio and video data.

In recent years, standardization of high-density optical discs capable of storing large amounts of high-definition video data and high-quality audio data such as HD-DVD (High Density-Digital Versatile Disc) and BD (Blu-ray Disc) has been rapidly progressed. have.

Such optical recording media may be read-only recording media such as CD-ROM (CD-Read Only Memory), DVD-ROM, CD-R (CD-Recordable), DVD-R, BD-R, Recordable recording media such as HD DVD-R and the like, and recording media capable of repeating recording such as CD-Rewritable (CD-RW), DVD-RW, BD-RE, and HD DVD-RW can be classified.

When data is recorded on the write-once optical disc, video data is recorded in 'title' units, and each time recording of one title is completed, temporary video management information on the recorded title (Temporary Video Manager Information) Create and record TMP_VMGI). Each time a title is additionally recorded, the management information for the newly recorded title is added to the management information for the previously recorded title.

By the way, in the case of an optical disc capable of recording once, when an error occurs during data recording and the recording of the temporary video management information (TMP_VMGI) for the recorded title fails, the previously recorded information cannot be accessed and the optical disc cannot be accessed. Problems arise that result in the loss of all recorded information.

For example, if recording failure occurs while recording the fourth title after recording three titles already on the optical disc, three temporary video management information (TMP_VMGI) is already recorded on the optical disc, and the third temporary video management information ( TMP_VMGI) records information on all three titles. Therefore, if the location where the third temporary video management information (TMP_VMGI) is recorded can be known, the three previously recorded titles can be recovered.

However, according to the conventional method, since it is impossible to know where the third temporary video management information TMP_VMGI is recorded, access to three previously recorded titles is impossible.

In particular, since the position where the temporary video management information TMP_VMGI is recorded depends on the size of the recorded title, it is not easy to retrieve the preliminarily recorded temporary video management information TMP_VMGI. That is, according to the conventional method, in order to retrieve the pre-recorded temporary video management information (TMP_VMGI), all the data recorded on the optical disc must be read. Therefore, it takes a long time to retrieve the pre-recorded temporary video management information for data recovery. Problem occurs.

Accordingly, it is an object of the present invention to allow temporary video management information for video data recorded in a data area to be recorded at a predetermined position, thereby recording previously recorded when a recording failure occurs during recording of data on a writeable optical disc. The present invention provides a recording control method of an optical disc that can be recorded once so that temporary video management information can be easily retrieved.

In addition, another object of the present invention is to retrieve and recover previously recorded temporary video management information when recording failure occurs while recording data on an optical disc that can be recorded once, so that even successfully recorded data cannot be reproduced. An object of the present invention is to provide a recording control method of an optical disc of write once type, which can be prevented.

In order to solve the above technical problem, the recording control method of an optical disc of write once type according to the present invention comprises the steps of: recording video data for a title on an optical disc of write once corresponding to a recording command; When recording of video data for one title is completed, determining whether the recorded position is a specific position; And when the recording is completed at the specific position, generates video title set information and temporary video manager information on the recorded video data to generate the specific position. Characterized in that it comprises the step of recording on.

The method may further include recording null data from the position at which the recording is completed to the specific position when the position where the recording is completed is not the specific position as a result of the determination.

On the other hand, in the recording control method of an optical disc of write once type according to the present invention, when a recording failure occurs during recording of the data, the optical pickup is reduced by a multiple of a specific value at a next writable address. Retrieving previously recorded temporary video management information while moving to a location; And if the temporary video management information is retrieved, determining whether the optical disc is capable of further recording.

If it is determined that additional recording is possible on the optical disc, the searched temporary video management information is recorded in the next recordable position, and the recording operation for video data of a failed recording or other title is continued. It further comprises the step.

In addition, when it is determined that additional recording is not possible on the optical disc, the optical disc is finalized after restoring video data for a previously recorded title using the retrieved temporary video management information. Characterized in that it further comprises the step.

Preferably, the method may further include providing a message to the user inquiring whether to recover the data before the video data recovery.

The video data recovery and the optical disc finalization may be performed when the user requests recovery of data.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail. However, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a schematic block diagram of an optical disc recording apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 1, the optical disc recording apparatus 100 according to the present invention includes a digital signal processor (DSP) 110, a channel bit encoder 120, an optical driver 130, and an optical pickup 140. ), An R / F unit 150, a servo unit 160, a motor driving unit 170, and a system control unit 180.

First, the present invention is applicable to a compact disc recorder (CDR) and a digital versatile disc recorder (DVDR) that are currently widely used and commercialized.

In addition, the present invention can be applied to a high-density optical disc recording apparatus capable of recording data on a high-density optical disc such as BD (Blu-ray Disc) or HD-DVD (High Density-DVD), which has recently been standardized. to be.

As the optical disk 100a applicable to the present invention, an optical disk capable of recording once, such as a CD-R (CD-Recorder), DVD ± R, BD-R, HD DVD-R, or the like, may be used.

The digital signal processor (DSP) 110 adds an error correction code (ECC) or the like to digital data input from the outside, converts it into a recording format, and outputs the converted data.

The channel bit encoder 120 reconverts the data converted into the recording format by the digital signal processor (DSP) 110 into a bit stream and outputs the data.

The optical driver 130 outputs a light amount driving signal according to the input signal.

The optical pickup 140 writes data input from the channel bit encoder 120 to the optical disc 100a according to the light amount driving signal output from the optical driver 130 and reads the data recorded on the optical disc 100a. The role of shipping.

The R / F unit 150 filters the signal output from the optical pickup 140 and filters the signal to output a binary signal.

The servo unit 160 of the motor driver 170 may be configured based on a focusing error (FE) signal for focusing servo and a tracking error (TE) signal for tracking servo output from the optical pickup 140. Control the drive.

The motor driver 170 generates a driving voltage for driving the spindle motor 172 and the slad motor 174 according to the control of the servo unit 160 to the spindle motor 172 and the slad motor 174. Supply.

The spindle motor 172 rotates the optical disc 100a in the forward or reverse direction according to the driving voltage applied from the motor driver 140.

The slad motor 174 moves the optical pickup 140 in the radial direction of the optical disc 100a according to the driving voltage applied from the motor driver 170.

The system controller 180 controls the overall operation of the optical disc recording apparatus 100.

When the recording failure occurs while recording data on the optical disc 100a, the optical disc recording apparatus 100 according to the present invention configured as described above obtains preliminarily recorded temporary video management information (TMP_VMGI: Temporary Video Manager Information). It is to be able to retrieve and recover a previously recorded title.

To this end, the system control unit 180 according to the present invention records data on the optical disc 100a in units of titles in response to a data recording command, but the temporary video management information (TMP_VMGI) for the recorded titles is located at a predetermined position. Process to be recorded.

2 is a diagram for explaining a data recording structure according to the present invention.

As shown in FIG. 2, whenever the recording of video data (VOBS for Title 1) for one title is completed, the system controller 180 determines whether the recording position is a specific position. If it is determined that the recording position is not the specific position, the system controller 180 pads null data from the recording completion position to the specific position. For example, as shown in FIG. 2, when the location where the temporary video management information (TMP_VMGI 1) for the first title is to be recorded is 0x12000 and the space where the VTSI backup is stored is 0x60 sectors, null data is displayed as the video data. It is filled from 0x11f00 to 0x11faf where recording is completed.

When null data padding is completed, the system controller 180 generates VTSI (Video Title Set Information) for the recorded video data, and records the VTSI backup at the next position where the null data is filled.

After the VTSI backup recording, temporary video management information (TMP_VMGI 1) information for temporarily managing information about video data is generated and recorded in a specified specific location. Next, the VTSI information is recorded in an area reserved for VTSI. This completes the recording of one title. By repeating this process, a plurality of titles are recorded on the optical disc 100a.

As described above, when recording the position where the temporary video management information (TMP_VMGI) for the title recorded in the data area is recorded to be a multiple of a specific value (predetermined value), the previously recorded temporary video management information (TMP_VMGI) is recorded. When searching, instead of searching all sectors, only sectors whose positions are reduced by multiples of a specific value (for example, 0x2000) need to be searched. Accordingly, according to the present invention, the time required for retrieving the temporary video management information (TMP_VMGI) upon recording failure can be significantly reduced.

However, if the specific value is too large, the portion wasted as null data increases, and if it is too small, the time required for searching the temporary video management information (TMP_VMGI) becomes long. Therefore, the specific value is preferably selected in consideration of the above two conditions. If the specific value is set to 0x2000 (16MB unit) as described above, the waste of null data is on average about 8MB per title, and only 1ECC data per 16MB is used when searching for temporary video management information (TMP_VMGI). You can read it.

Hereinafter, a recording control method of an optical disc of write once type according to the present invention will be described in more detail with reference to FIGS. 3 and 4.

3 is a flowchart illustrating a recording control method of an optical disc of write once type according to the present invention.

Referring to FIG. 3, in response to receiving a data recording command, the system controller 180 records video data on the optical disc 100a and records the data in title units (S210 and S220).

When recording of video data for one title is completed (S230), the system controller 180 determines whether the position where recording is completed is a specific position (S240).

As a result of the determination in step S240, when it is determined that the position where the recording of the video data is completed is not the specific position, the system controller 180 pads null data from the position where the recording is completed to the specific position (S250).

Since the size of the recorded video data is different for each title, when the predetermined null data is padded according to the size of the recorded video data, the position where the temporary video management information (TMP_VMGI) for the recorded video data is a multiple of a specific value. You can record regularly at.

Next, the system controller 180 generates VTSI (Video Title Set Information) for the recorded video data, and records it as a VTSI backup at the next position where null data is filled (S260).

The system controller 180 generates temporary video management information (TMP_VMGI) for temporarily managing information on the recorded video data and records the VTSI backup at the next location where the VTSI backup is recorded (S270).

Next, the system controller 180 records the VTSI information in an area reserved for VTSI. This completes the recording of one title.

The system controller 180 determines whether a write end command is received (S280), and repeats the operations of steps S220 to S270 until a write end command is received. This makes it possible to record a plurality of titles on the optical disc 100a.

4 is a flowchart illustrating a method of operating when a write fails while performing a data write operation according to the present invention.

Referring to FIG. 4, when a recording failure occurs while performing a data recording operation as in FIG. 3 (S310 and S320), the system controller 180 may refer to a next recordable position (NWA) based on a next writable address (NWA). The temporary video management information (TMP_VMGI) is retrieved (S330).

In more detail, the system controller 180 moves the optical pickup 140 to a position in which the optical pickup 140 is reversely moved by the size of the temporary video management information TMP_VMGI from the next recordable position NWA, and temporarily moves to the moved position. It is determined whether the video management information (TMP_VMGI) is recorded. The size of the temporary video management information (TMP_VMGI) is already determined by the standard.

If the search for the temporary video management information (TMP_VMGI) fails in the next recordable position (NWA) (S340), the system control unit 180 determines the position where the search for the temporary video management information (TMP_VMGI) has failed. On the contrary, the temporary video management information TMP_VMGI is searched while moving by a multiple of a specific value, in step S350.

On the other hand, when the retrieval of the temporary video management information (TMP_VMGI) is successful, the system controller 180 determines whether additional recording is possible on the optical disc 100a (S360).

If it is determined in step S360 that additional recording is possible in the optical disc 100a, the system controller 180 restores previously recorded data using the retrieved temporary video management information TMP_VMGI. In step S370, the recording operation for the title or other title that has failed to be recorded can be continuously performed using the remaining space where additional recording is possible.

On the other hand, if it is determined that additional recording on the optical disc 100a is not possible, the system controller 180 creates a file system and a VMGI using the retrieved temporary video management information (TMP_VMGI) and reserves it. After recovering previously recorded data recorded in the file system and the VMGI area, the optical disk 100a is finalized (S380). In this case, titles recorded successfully before the recording failure are recovered and can be reproduced by a general optical disc reproducing apparatus.

Preferably, when the additional recording is not possible on the optical disc 100a, a message is provided to the user inquiring whether to recover the data, and only after the user recovers the data, the optical disc 100 Of course, it can be implemented to finalize 100a).

In addition, the present invention has been described in detail through the representative embodiments, but those skilled in the art to which the present invention pertains various modifications without departing from the scope of the present invention with respect to the embodiments described above. I will understand what is possible. 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 so far, according to the present invention, the temporary video management information for video data recorded in the data area is recorded at a position that is a multiple of a specific value, whereby a recording failure occurs while recording data on the optical disc. Since the temporary video management information recorded previously successfully can be easily retrieved, the phenomenon in which even the previously recorded temporary video management information can not be retrieved as in the prior art and the data recorded normally can be prevented.

Claims (6)

Recording video data for a title on an optical disc that can be written once in response to a recording command; When recording of video data for one title is completed, determining whether the recorded position is a specific position; And As a result of the determination, when the recording position is a specific position, video title set information and temporary video manager information of the recorded video data are generated and recorded at the specific position. And a recording control method of an optical disc of write once type. The method of claim 1, And recording the null data from the position where the recording is completed to the specific position when the recording is not a specific position as a result of the determination. Control method of recording. The method of claim 1, Retrieving the previously recorded temporary video management information while moving the optical pickup to a position reduced by a multiple of a specific value from a next writable address when a recording failure occurs during the data recording; ; And And determining whether the optical disk is in a state where additional recording is possible when the temporary video management information is retrieved. The method of claim 3, wherein If it is determined that additional recording is possible on the optical disc, the searched temporary video management information is recorded in the next recordable position, and the recording operation for video data of a failed recording or other title is continued. The recording control method of an optical disc, which can be written once. The method of claim 3, wherein If it is determined that additional recording is not possible on the optical disc, restoring video data for a previously recorded title using the retrieved temporary video management information, and finalizing the optical disc; And a recording control method for a write once optical disc. The method of claim 5, Before the video data recovery, Providing a message to the user inquiring whether or not to recover the data; The video data recovery and the optical disc finalization are performed when the user requests recovery of the data.

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