KR20050121181A - Method for managing a disc information of high density optical disc - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing disc information of a high density optical disc, wherein a part of a recording section of a PIC area of a high density optical disc such as a reproduction-only Blu-ray disc (BD-ROM) is provided in the form of a wobbled pit. In addition to recording the disk information DI, the disk information in the wobble pit type is pushed by recording the disk information in the same Pit form as the main data in the remaining PIC areas other than the partial recording section. It is possible to quickly detect by the push-pull signal method, and also to detect and demodulate the serial pit type disk information compatible with the RF signal method such as the main data recorded in the data area. The disc type information is additionally recorded in the BCA area allocated before the PIC area, so that the type of the optical disc may be changed during the initial operation. By allowing you to determine enemy, a very useful inventions that are able to correctly perform the initial servo operation.

Description

{Method for managing a disc information of high density optical disc}

The present invention records disc information (DI) in a Permanent Information & Control data (PIC) area of a high-density optical disc such as a reproduction-only Blu-ray Disc-ROM (BD-ROM). A disk information management method of a high density optical disk for management.

In recent years, the standardization of new high-density optical discs, such as Blu-ray Disc-Rewritable (BD-RE), which can record and store high-quality video data and high-quality audio data for a long time, has made rapid progress. As a result, related products are expected to be developed, released and commercialized.

Meanwhile, as shown in FIG. 1, the BD-RE has a clamping area, a transition area, a BCA area, and a lead-in area on the inner circumferential surface of the disc, and the center of the disc The outer periphery has a disk structure in which a data area and a lead-out area respectively exist.

The lead-in area may include a first guard (Guard 1) area and a PIC area, a second guard (Guard 2) area, an information 2 (Info 2) area, an OPC (Optimum Power Control) area, and the like. The first guard area and the PIC area are allocated, while the data is pre-recorded area, while the remaining lead-in area, the data area, and the lead-out area are previously allocated. Is a rewritable area where new data is rewritten.

In the PIC area, a high frequency modulated (HFM) groove is formed and recorded as the area where the main general information of the disk to be permanently stored is recorded. The HFM groove is shown in FIG. As described above, the data is modulated and recorded by a Bi-Phase Modulated method to record and store disk information.

On the other hand, in addition to the development of the BD-RE, a new high-density optical disc, for example, a playback-only Blu-ray disc (BD-ROM), which is currently being discussed among related companies, as shown in FIG. ), A clamping area, a transition area, and an information area and a rim area, each of which is divided into the information area and recorded in a data area. Record and play disc information (DI) in the same pit form as main data, such as an A / V stream, for example, 64KB error correction (ECC) structure and a serial pit modulated by 17PP modulation. In performing the operation, a method of detecting and demodulating the modulated recorded disk information in the form of a serial pit by an RF signal method is under consideration.

However, when the disk information recorded in the PIC area is recorded in the same pit form as the main data as described above, the disk information must be detected and demodulated by the RF signal method. As the time required for a long time is generated, a more efficient disk information management method is urgently required.

In addition, when the disc information in the form of HFM groove is recorded in the PIC area of the BD-RE, and the disc information in the serial pit type is recorded in the PIC area of the BD-ROM, in the optical disc device, the BD inserted and seated in the device is used. It is necessary to select and apply the method of reading the disc information of the RE or BD-ROM, for example, with the BD-ROM inserted in the device, of the HFM groove recorded in the PIC area of the BD-RE. When a detection method corresponding to the disc information is selected and applied, a problem arises in that disc information recorded in the serial pit form in the PIC area of the BD-ROM cannot be detected normally.

Accordingly, the present invention has been made in view of the above-mentioned circumstances and problems, and more efficiently utilizes disk information DI recorded in a PIC area of a high-density optical disc such as a reproduction-only Blu-ray disc (BD-ROM). It is an object of the present invention to provide a method for managing disc information of a high density optical disc in order to enable recording management.

In the disc information management method of the high density optical disc according to the present invention for achieving the above object, the disc information is recorded in a wobble pit form in a part of the recording area of the IC region of the high density optical disc, In the remaining PIC area, the disc information is recorded in the same pit form as the main data.

Further, the disk information management method of the high density optical disc according to the present invention detects the disc information recorded in the wobble pit form in a part of the recording area of the PC area of the high density optical disc by the push-pull signal method, and records the partial information. The disk information recorded in the same pit shape as the main data in the remaining PIC areas other than the section is detected by a high frequency signal method.

In the high-density optical disc according to the present invention, wobble pit-shaped disc information is recorded in a part of recording region of the IC region of the high-density optical disk, and the same pit as the main data is recorded in the other IC region other than the part of the recording region. It is characterized in that the disk information of the form is recorded.

Best Mode for Carrying Out the Invention A preferred embodiment of the method for managing disc information of a high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

First, a high-density optical disc according to the present invention, for example, a reproduction-only Blu-ray disc (BD-ROM), as described above with reference to Fig. 3, is used for the inner region, the clamping region, the transition region, In the PIC area having a disk structure and separately allocated in the information area, as shown in FIG. 4, in addition to the disk information DI having the same serial pit type as the main data recorded in the data area, wobbled pits are provided. The disk information DI in the form is recorded.

For example, the PIC region may be allocated to a recording size of 2720 clusters, and the first cluster of the 2720 clusters records disc information in the form of a bi-Phased wobble pit. In the remaining PIC area, disk information (DI) and copy protection information in the form of a serial pit modulated by a 64 KB error correction (ECC) structure and a 17PP modulation method can be recorded. have.

On the other hand, the wobble pit type disk information is detected by a push-pull signal method, and the serial pit type disk information and copy protection information are RF signals as the main data recorded in the data area. It is detected and demodulated by the (RF Signal) method.

For example, as shown in FIG. 5, a wobble data sequence having a value of '0101' is equal to a total of 36T sections ('0') in which six 3T pit rows are continuously recorded on the same track line. A total of 36T sections ('1') in which three 3T pit rows are each recorded discontinuously at different positions in the track can be recorded, and the reflected light reflected by the continuous or discontinuously recorded pit rows is The photoelectric conversion is performed by a quadrature light receiving element (not shown) applied to a conventional tracking servo.

The photoelectrically converted electrical signals Ea, Eb, Ec, and Ed are, as shown in FIG. 5, a plurality of phase amplifiers 13, 14, 15, 16 and first and second summation amplifiers ( 10, 11, and the differential amplifier 12, the tracking error signal (TE = (Ea + Ec)-(Eb + Ed)) of the push-pull signal is detected and output from the differential amplifier, and separate error correction is performed. And disc information can be detected quickly without demodulation operation.

In addition, as shown in FIG. 6, the reflected light reflected by the disk information and the copy protection information recorded in the series pit form in the PIC region is photoelectrically converted by a quadrature light receiving element, and the photoelectrically converted electrical signals (Ea, Eb, Ec, Ed) are summed and amplified by the first and second summation amplifiers 20, 21 and the third summation amplifier 22, respectively, and the RF signal RF = (Ea + Ec) + (Eb + Ed)), and the error correction and demodulation section 23 demodulates and outputs the original disc information and copy protection information so as to be compatible with the main data recorded in the data area. Can be detected.

Meanwhile, as shown in FIG. 7, various pieces of important information such as a disc information ID, a disc information format, a disc type ID, a disc size / version, a disc structure, and the like are recorded in the disc information. The disk type ID (disc_type_id = “BDO”) information may be additionally recorded in the burst cutting area (BCA) area allocated before the lead-in area as shown in FIG. 8.

For example, when the disc type information additionally recorded in 2 bits in the BCA area is' Disc_Type = 00b ', it indicates a BD-RE, and when' Disc_Type = 01b ', a BD-R that can be written once, and' If Disc_Type = 10b ', this indicates that the disc is a BD-ROM.

Therefore, as shown in FIG. 9, in the optical disk apparatus including the optical pickup 30, the VDP (Video Disc Play) system 31, the D / A converter 32, and the like, additional recording is performed in the BCA area. The disc type (Disc_Type) information is first detected to determine the type of the optical disc, and then the initial servo operation corresponding thereto can be accurately performed.

Further, in the optical disk apparatus, it is possible to quickly detect the disk information recorded in the wobble pit shape in the head recording section of the PIC area by using a push-pull signal method, and the spare area of the disk information is reserved. The disc information size (DI_Size) information for indicating the recording size of the disc information may be included or recorded, or the flag (Last_DI_End_Flag) information for indicating the last disc information may be recorded.

Accordingly, in the optical disc device, the disc information recorded in the PIC area is copied with reference to the disc information size (DI_Size) information recorded in the free area of the disc information or the last disc information end flag (Last_DI_End_Flag) information. The prevention information can be accurately classified and detected.

For reference, a separate transition region for separately detecting the disc information and the copy protection information may be allocated in the PIC region.

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 disk information management method of the high density optical disc as described above can quickly detect the wobble pit type disc information recorded in the PIC area by the push-pull signal method, and the serial pit type. Disc information and copy protection information can be detected and demodulated in the same RF signal manner as the main data recorded in the data area, and the disc type information recorded in the BCA area is referred to to the optical disc. It is a very useful invention that enables accurate initial servo operation.

1 shows a disc structure for a rewritable Blu-ray Disc (BD-RE),

2 shows a high frequency modulation (HFM) groove recorded in a PIC region of a rewritable Blu-ray disc,

3 shows a disc structure for a playback-only Blu-ray disc (BD-ROM),

Fig. 4 shows an embodiment of the disc information DI recorded and managed by the disc information management method of the high density optical disc according to the present invention.

FIG. 5 illustrates disc information in the form of a wobble pit recorded and read out according to the present invention;

FIG. 6 shows disk information in the form of serial pit recorded and read out in accordance with the present invention;

7 shows fields of disc information recorded and managed according to the present invention;

8 illustrates disc type information additionally recorded in a BCA area according to the present invention.

9 schematically shows a configuration of an optical disk device to which the present invention is applied.

※ Explanation of code for main part of drawing

10,11,20,21,22: summing amplifier 12: differential amplifier

13,14,15,16: phase amplifier 23: error correction and demodulation

30: optical pickup 31: VDP system

32: D / A Converter

Claims (19)

Information is recorded in the form of a wobble pit in at least a part of the recording section of the control area of the optical recording medium, And recording information in the same pit form as main data in the remaining areas other than the partial recording section. The optical recording medium of claim 1, wherein the partial recording section is a head recording section of a PIC area in the control area, and has a recording size of at least one cluster. How to record data. The method of claim 1, wherein the wobble pit shape is a biphasic wobble pit shape. A data recording method according to claim 1, wherein at least copy protection information is recorded in the remaining areas other than the partial recording section. The method of claim 1, wherein the same pit shape as the main data is formed of serial pits. 6. The data recording of an optical recording medium according to claim 5, wherein the data modulated by the same modulation method as the main data recorded in the data area of the optical recording medium is recorded in the remaining areas other than the partial recording section. Way. The method of claim 1, wherein at least one of control information recorded in the control area is recorded in a BC area provided before the control area. The method of claim 1, wherein the control information records size information indicating a magnitude of control information or a last control information ending flag indicating last control information. In addition to detecting information recorded in a wobble pit form in at least a part of the recording area of the control area of the optical recording medium by a push-pull signal method, And detecting information recorded in the same pit shape as the main data in the remaining areas other than the partial recording section by a high frequency signal method used for detecting the main data. 10. The method of claim 9, wherein information recorded in the same pit form as the main data and copy protection information are detected in a remaining area other than the partial recording section by a high frequency signal method. The data reproduction method of claim 10, wherein the copy protection information is detected by referring to the control information size information recorded in the control information. 12. The method of claim 10, wherein the copy protection information is separately detected by referring to a last control information ending flag recorded in the control information. Wobble pit type information is recorded in at least one recording section of the control area of the optical recording medium, and information in the same pit form as the main data is recorded in the remaining areas other than the partial recording section. Record carrier. The optical recording medium according to claim 13, wherein the high density optical disc is a reproduction-only Blu-ray disc. The optical recording medium according to claim 13, wherein the partial recording section records control information in the form of a biphasic wobble pit having at least one cluster recording size. The optical recording medium of claim 13, wherein the same pit shape as the main data is in the form of a serial pit. The optical recording medium according to claim 13, wherein information modulated by the same modulation method as the main data recorded in the data area of the optical recording medium is recorded in the remaining areas other than the partial recording section. The optical recording medium according to claim 13, wherein at least one of control information recorded in the control area is recorded in a BC area allocated before the control area. The optical recording medium according to claim 13, wherein the control information includes size information indicating the size of control information or a last control information ending flag indicating last control information.