KR20060067340A - Method for compensating defect on one time recordable optical disc - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for correcting a defect of an optical disc that can be recorded once, for example, in a DVD-Recorder, recording data onto an optical disc such as a DVD (for example, DVD + R) that can be recorded once. In the meantime, when data recording is completed, the file system, navigation information, and free space allocation table (RSAT) are recorded at the recording position, and the recording position (RSAT_Add) information of the free space allocation table is stored in the flash memory. If the free space allocation table is not normally detected due to a disk defect or the like after being stored in the same nonvolatile memory, the data is recorded on the optical disc with reference to recording position information of the free space allocation table stored in the nonvolatile memory. Searching and detecting the free space allocation table to ensure that previously recorded audio has been And it would be very useful to be able to effectively prevent inventors to be able to play back the read video data.

Write-once optical disc, DVD + R, free space allocation table, disc defect, recording location information, DVD recorder, flash memory

Description

Device and method for compensating defect of write once optical disc {Method for compensating defect on one time recordable optical disc}             

FIG. 1 shows a data recording process of a general write once DVD (R).

2 shows a configuration of a DVD recorder to which the present invention is applied;

3 shows a data recording process of a write once DVD (DVD + R) to which the present invention is applied;

4 is a flowchart illustrating an operation of a method for correcting a defect of an optical disc of write once type according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: DVR system 13: microcomputer

14: OSD generator 15: information generator

16: memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defect correction apparatus and method for an optical disc that can be recorded once. For example, even if a disc defect occurs in a DVD (R) capable of recording once, an audio already recorded on the disc is recorded. And an apparatus and method for correcting a defect of an optical disc of write once type for enabling normal reading and reproducing of video data.

In general, optical discs capable of recording and playing back high-definition video data and high-quality audio data, such as digital versatile discs (DVDs), are widely used and are used for playback-only DVDs (DVD-ROMs). ), Write once DVDs (DVD-R, DVD + R), and rewritable DVDs (DVD-RW, DVD + RW, DVD-RAM).

On the other hand, in the DVD recorder (DVD-Recorder) that can record or play data on the DVD as described above, for example, when the data recording operation is performed while the DVD + R is inserted into the device, FIG. As shown in FIG. 1, a predetermined recording period (for example, up to 0x3E00) assigned to the first track (Track 1) after the lead-in area of the DVD + R and the second track are allocated. After the first buffer section, data is recorded.                         

When the data recording is completed, the file system (FS) and the navigation (NAVI) information are recorded at the recording end position, and then the reserved space allocation table (RSAT) information is recorded. Next, the next writable address (NWA) is recorded in the free space allocation table (RSAT) information.

In the DVD recorder, when data is subsequently recorded at the request of a user, new data is continuously recorded by referring to a next recordable address NWA recorded in the free space allocation table (RSAT) information. When the data recording is completed, as described above, the file system FS, the navigation NAVI information, and the free space allocation table RSAT are recorded at the recording end position.

However, when a disc defect or the like occurs in a DVD + R in which data, file system, navigation information, and free space allocation table information are sequentially recorded as described above, for example, because of a disc defect, When the first recordable address NWA fails to detect the recorded free space allocation table RSAT information, even if audio and video data is normally recorded on the DVD + R, the audio and video data cannot be read and reproduced. Problems will arise.

Accordingly, the present invention has been created to solve the above problems, and for example, when data recording is completed on an optical disc such as DVD + R, the file system, navigation information, and free space allocation table (RSAT) are recorded at the recording position. In addition, the recording position (RSAT_Add) information of the free space allocation table is stored in the memory in the device, and if the free space allocation table is not normally detected due to a disk defect or the like, it is stored in the memory. By referring to the recording position information of the free space allocation table, the free space allocation table recorded on the optical disc is searched and detected, so that even if a disc defect occurs, once recording is performed so that audio and video data already recorded can be read and reproduced normally. To provide a device and a method for correcting defects of optical discs, There is an enemy.

In order to achieve the above object, a method of correcting a defect of a writeable optical disc according to the present invention comprises the steps of: recording data on a writeable optical disc: file system and navigation information at a recording position where the data recording ends And recording the free space allocation table; And storing the recording position information of the free space allocation table in a memory in the device.

Also, a defect recording apparatus of a write once optical disc according to the present invention includes: recording means for recording data on a write once optical disc; Generating means for generating a file system, navigation information, and a free space allocation table for controlling reproduction of the recorded data; And control means for recording the file system, the navigation information, and the free space allocation table at the recording position where the data recording is to be completed, and storing the recording position information of the free space allocation table in a memory in the apparatus. It is characterized in that the configuration.

Best Mode for Carrying Out the Invention A preferred embodiment of the defect correction apparatus and method for a write once optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

First, the apparatus and method for correcting a defect of an optical disc of write once type according to the present invention can be applied to various types of optical disc devices such as a DVD recorder. For example, as shown in FIG. Optical disc 10, optical pickup 11, VDR (Video Disc Record) system 12, microcomputer 13, OSD generating unit 14, information generating unit 15, memory 16, etc. It is composed.

On the other hand, in the information generating unit 15, as shown in FIG. 3, when data recording is completed on the optical disc 10, for example, DVD + R, the file system FS and the navigation ( NAVI) information and Free Space Allocation Table (RSAT) information are generated, and the microcomputer 13 operates the VDR system 12 to control the information on DVD + R. In this case, the recording position RSAT_Add information in which the free space allocation table information is recorded is stored in a nonvolatile memory 16 such as a flash memory.                     

In addition, the recording position (RSAT_Add) information is stored in a 4-byte recording size suitable for, for example, DVD + R, and in the nonvolatile memory 16, a storage space for storing the recording position information is separately provided. In the divided allocation, up to 49 Recording Blocks can be recorded in the DVD + R, so that the storage space is allocated with a recording size of at least 196 bytes (4 bytes X 49) or more.

After that, if the free space allocation table is not normally detected due to a disk defect or the like, the DVD + R is referred to the recording position RSAT_Add information of the free space allocation table stored in the nonvolatile memory 16. By searching and detecting the recorded free space allocation table, it is possible to prevent reading or playing back previously recorded audio and video data due to a disc defect or the like, which will be described in detail as follows.

FIG. 4 is a flowchart illustrating a method for correcting a defect of an optical disc of write once type according to the present invention. As described above, in the microcomputer 13, the DVD + R 10 is requested by a user. In the case of recording data in the above), the VDR system 12 is controlled to operate, and as shown in FIG. 2, the predetermined track 1 is allocated to the first track Track 1 after the lead-in area LIA of the DVD + R. Data is recorded after the recording section (eg, up to 0x3E00) and the first buffer section allocated to the second track (S10).

When the data recording is completed (S11), the information generating unit 15 is operated to control the file system FS and the navigation NAVI information at the data recording end position, and then the free space allocation table ( RSAT information is recorded (S12). At this time, the microcomputer 13 checks the recording position of the free space allocation table RSAT, and then records the recording position (RSAT_Add # 1) information in the memory 16. ) Is stored in step S13.

In addition, when the microcomputer 13 records data again according to a user's request, the microcomputer 13 refers to the next recordable address NWA recorded in the free space allocation table RSAT information to obtain new data. When the data recording is completed, as described above, the file system FS, the NAVI information, and the free space allocation table RSAT are recorded at the recording end position, and the free space is recorded. A series of operations of storing the recording position (RSAT_Add # 2) information of the allocation table in the memory 16 is repeatedly performed.

On the other hand, the microcomputer 13 detects the free space allocation table information recorded on the DVD + R when a mode for detecting the free space allocation table RSAT is set according to a user's request for playback operation or the like (S14). For example, when a disc defect or the like occurs in the DVD + R, and the free space allocation table information cannot be detected normally (S15), the free space allocation table stored in the memory 16 is stored. The recording position (RSAT_Add) information is retrieved (S16).

In addition, the free space allocation table recorded in the DVD + R is searched and detected with reference to the recording position RSAT_Add information of the free space allocation table found in the memory 16 (S17). It becomes possible to perform the operation (S18).

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The apparatus and method for correcting a defect of a writeable optical disc according to the present invention, which is constructed and constructed as described above, is used to record data on an optical disc such as a DVD (for example, DVD + R) that can be written once, for example, in a DVD recorder or the like. On the way, when data recording is completed, the file system, navigation information, and free space allocation table (RSAT) are recorded at the recording position, and the recording position (RSAT_Add) information of the free space allocation table is stored in the same manner as the flash memory. If the free space allocation table is not normally detected due to a disk defect or the like after the storage in the nonvolatile memory, the free space recorded on the optical disc is referred to by referring to the recording position information of the free space allocation table stored in the nonvolatile memory. By searching and detecting the space allocation table, it is possible to Being able to play back the image recorded audio and video data read out would be very useful to be able to prevent inventors efficiently.

Claims (10)

Step 1: Write data to a writeable optical disc: Recording a file system, navigation information, and a free space allocation table at a recording position where the data recording ends; And And recording the position information of the free space allocation table in a memory in the apparatus. The method of claim 1, And detecting the free space allocation table by referring to recording position information of the free space allocation table stored in the memory when the free space allocation table recorded on the writeable optical disc is not normally detected. A method of correcting a defect of an optical disc, which can be written once. The method of claim 1, The write once optical disc is DVD + R, and after the free space allocation table, new data is continuously recorded. The method of claim 1, The recording position information of the free space allocation table has a recording size of 4 bytes, and is stored in a nonvolatile memory provided in the DVD recorder. The method of claim 4, wherein And a non-volatile memory is allocated a storage space of 196 bytes or more for storing recording position information of the free space allocation table. Recording means for recording data on an optical disc which can be written once; Generating means for generating a file system, navigation information, and a free space allocation table for controlling reproduction of the recorded data; And And a control means for recording the file system, the navigation information, and the free space allocation table at the recording position where the data recording is to end, and storing the recording position information of the free space allocation table in a memory in the apparatus. An apparatus for correcting a defect of an optical disc of write once type, characterized in that it is used. The method of claim 6, The control means detects the free space allocation table by referring to recording position information of the free space allocation table stored in the memory when the free space allocation table recorded on the writeable optical disc is not normally detected. An apparatus for correcting a defect of an optical disc, which can be written once. The method of claim 6, The write once optical disc is DVD + R, and after the free space allocation table, new data is continuously recorded. The method of claim 6, The memory is a non-volatile memory provided in the DVD recorder, wherein the recording position information of the free space allocation table having a recording size of 4 bytes is stored. The method of claim 9, And 196 bytes or more of storage space for storing recording position information of the free space allocation table is allocated to the memory.

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