KR20050006553A - Optical disc and recording method of Disc Information of optical disc - Google Patents

Abstract

PURPOSE: An optical disc and a disc data recording method are provided to efficiently record a position of standardized disc information for a high speed disc drive and to efficiently record or reproduce information by using the standardized disc information. CONSTITUTION: The method comprises several steps. Disc information is prepared for each allowable recording layer and each speed. The disc information is separated into information for designating a position of the first disc information for each allowable high speed, and data for designating a position of the disc information for each allowable recording layer. A position of desired disc information can be checked by combining the information for designating the position of the first disc data for each allowable high speed and the information for designating the position of the disc information for each allowable recording layer.

Description

Optical disc and recording method of Disc Information of optical disc

The present invention relates to a method of recording disc information in a recordable optical disc, and more particularly, to a method of recording information indicating a specific position of the disc information in the disc information and a method of searching for desired disc information.

As optical recording media, optical disks capable of recording large amounts of data are widely used. Recently, new high-density optical recording media (HD-DVD), for example, Blu-ray Disc, which can record and store high-quality video data and high-quality audio data for a long time, have been developed.

Blu-ray Disc, the next-generation HD-DVD technology, is a next-generation optical recording solution that can store data that significantly surpasses existing DVDs. Recently, world-standard technical specifications have been established.

Blu-ray Disc, one of the world's next-generation HD-DVD world standards, uses a 405nm blue-violet laser, which is much denser than current DVDs with 650nm red lasers, and has a thickness of 1.2mm and a diameter of 0.1mm. A 12cm disc can hold a greater amount of data than a current DVD.

A variety of standards have been prepared for Blu-ray Discs, including the rewritable 1x Blu-ray Disc (BD-RE), followed by the write-once Blu-ray Disc (BD-WO) and the rewritable High-speed Blu-ray Disc (BD-RE). Various standards are being prepared for.

In the case of the above BD-RE, only the case where rewritable at 1x speed is discussed, it is necessary to cope with future high-speed (more than 2x) BD-RE, especially in case of BD-WO which is recently discussed. As standardization is also in progress, efficient countermeasures for high speeds in high density optical discs are urgently required, and in particular, this should be provided as standardized information to ensure mutual compatibility.

The present invention was created in view of the above situation, and aims to propose a new method for recording disc information as standardized information corresponding to high speed, in particular, to efficiently record the position of specific disc information, and from the recorded disc information. The purpose of performing efficient recording and reproducing of an optical disc has the following technical problems.

By recording the disc information corresponding to the high speed in the standardized method in the specific area of the disc, it is intended to provide mutual compatibility between the discs of the same series.

In addition, the present invention provides a method of searching for disc information that can quickly acquire contents of desired disc information related to a specific speed when recording and reproducing actual data on an optical disc using recorded disc information.

1 shows a simplified illustration of a disk of a single layer structure to which the present invention is applied;

2 shows a simplified illustration of a disk of a dual layer structure to which the present invention is applied;

Fig. 3 shows a part of the management area in which the disc information of the present invention is recorded, and briefly shows a form in which the disc information is recorded in the area.

4 shows an embodiment of recording disc information according to the present invention;

FIG. 5 shows an example of recording position information of 16 disc information according to the present invention as the embodiment of FIG.

FIG. 6 shows an example of recording position information of eight disc information according to the present invention as the embodiment of FIG.

7 shows another embodiment of recording disc information according to the present invention;

8 shows an optical disc recording and reproducing apparatus using disc information according to the present invention.

SUMMARY OF THE INVENTION A method for recording disc information of an optical disc according to the present invention for solving the above technical problem is a method of recording disc information in a management area of an optical disc having at least one or more recording layers, wherein the disc is recorded at an acceptable recording layer and at a double speed. And separately specifying information for specifying the position of the first disc information per allowable speed and information for specifying the position of the disc information of the allowable recording layer in the disc information.

Further, a method of recording disk information of an optical disk according to the present invention is a method of recording disk information in a management area of an optical disk having at least one recording layer, wherein the disk information is separately provided for each acceptable recording layer and double speed. In the disc information, a first group field for separately recording information for specifying the position of the first disc information per allowable speed and information for specifying the position of the disc information in the allowable recording layer, and the first group field. In the case where at least one of the double speed information and the recording layer information specified in the above requires a specific number or more of different information, the second group field is additionally recorded in the same manner as the first group field.

In addition, the optical disc according to the present invention has a recordable area and an area which is pre-recorded and impossible to record. In the pre-recorded area, disc information is separately provided for each allowable recording layer and double speed, and allowed in the disc information. Characterized in that the information specifying the position of the first disc information for each possible speed and the information specifying the position of the disc information of the allowable recording layer are recorded separately from each other,

The disc information search method of an optical disc according to the present invention is a method of searching for a position of disc information related to a specific speed of a specific recording layer recorded in a management area of an optical disc having at least one recording layer. Reproducing the recorded management area, and identifying the position of the desired disc information from the first reproduced disc information in the management area, wherein the position of the first disc information per allowable speed is designated in the disc information. And the information designating the position of the disc information of the allowable recording layer are recorded separately from each other, and the desired disc information is identified by combining these information.

In addition, the recording and reproducing apparatus of the optical disc according to the present invention includes a control unit which transmits a recording command, and when recording the recording command and performing recording according to the recording command, separately recorded for each recording layer and speed in the management area of the optical disc. Read the disc information, and also read the position information designating the position of the disc information related to the specific speed of the specific recording layer recorded in each disc information, and confirm the position of the disc information related to the specific recording layer and the speed from the position information. Therefore, it is characterized in that it comprises a recording and reproducing section for performing recording by using the recording-related information recorded in the identified disk information.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a disc information recording method and search method of an optical disc and an optical disc recording and reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, an optical disc will be described by taking a case of a recordable Blu-ray disc (BD-RE / BD-WO) as an example.

In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, The present invention is to be understood as the meaning of terms rather than names.

Fig. 1 shows the structure of an optical disc according to the present invention, and an optical disc to which the present invention is applied is sufficient if a recordable optical disc is sufficient, and it can be applied regardless of whether it is an optical disc that can be rewritable many times or once.

FIG. 1 is a structure of an optical disc of the present invention, which shows a single layer structure having one recording layer, and FIG. 2 shows a case of a dual layer having multiple recording layers. The recording layer starting with lead-in in the dual layer is called the first recording layer (Layer0), and the recording layer ending with lead-out is called the second recording layer (Layer1). Therefore, the recording layer is expandable in multiple layers, and the extended recording layer will be named as the third recording layer Layer2 and the fourth recording layer Layer3, respectively.

The inner and outer peripheral areas of the disk are provided with lead-in and lead-out areas as management areas. In particular, the inner disk area is divided into a pre-recorded area and a rewritable or write-once area. . The pre-recorded area is an area that is already recorded at the time of disc creation and is no longer recordable by the user or the system. In particular, in BD-RE / WO, the pre-recorded area is called PIC (Permanent Information & Control data). In the PIC area, disc information (hereinafter also referred to as "DI") is recorded as information necessary for recording a disc. The data area is provided with a user data area in which the user's actual data is recorded and spare areas (ISA, OSA) for replacing a defective area, in particular, such as a BD-WO. An optical disc that can be written once is provided with a TDMA (Temporary Defect Management Area) for recording information for disc defect management and general management. In the case of a rewritable BD-RE, TDMA is left as a reserved area because it is not necessary.

The present invention relates to a method of efficiently recording speed information required for recording and reproducing a disc in the pre-recorded area, as well as recording positional information for easily acquiring the plurality of disc information. Naturally, the recording method of the pre-recorded area is applied differently to each type of disc. In the case of BD-RE / WO, the PIC area as the pre-recorded area is recorded as a biphase high frequency modulated signal. The high frequency modulated signal of the corresponding area is reproduced according to a specific reproduction method and information is obtained from the same.

FIG. 3 briefly shows the structure of the PIC area in the disk structure shown in FIG. This means that when all the information in the high frequency modulated PIC region is acquired as described above, the information can be rearranged in the structure as shown in FIG. 3, and the PIC region is not physically recorded as shown in FIG. 3. . In the BD-RE / WO, the minimum recording unit is represented by 'cluster', and the PIC area consists of 544 clusters to form a fragment as one upper recording unit, and a total of five fragments ( Fragments) gather to form the PIC region. The disc information is recorded in the head cluster of the first fragment IF0. The disc information is recorded in plural numbers per recordable layer and permissible speed of the optical disc, and one disc information is composed of 112 bytes. . Disk information composed of 112 bytes is called a disk information frame (DI frame). In addition, by repeatedly recording the same disk information in the head cluster of the remaining fragments, it is possible to cope with the loss of the disk information.

Therefore, in order to obtain disc information related to a specific speed of a specific recording layer from a plurality of pieces of disc information, it is necessary to record the position information (also called a DI frame pointer) of these disc information. For example, if there are four recording layers and four allowable speeds for each recording layer, a total of 16 disc informations are required, and the system is inconvenient to search the entire disc information every time a specific disc information value is needed. This is to be solved as the location information of the disk information.

4 to 8, various embodiments of a method of recording location information and the like in the disc information in the present invention will be described in detail.

4, 5 and 6 show one embodiment of recording disc information of an optical disc according to the present invention.

Fig. 4 briefly shows the structure of the disc information in order to explain the present embodiment. First, the sequence is determined as a serial number for each disc information, and this is recorded in 1 byte. For example, this information is recorded in the fifth byte of the disk information, and this information is referred to as "DI frame sequence number in DI block", and is briefly expressed as "00h, 01h, 02h ---". That is, if the information of the 5th byte is "00h", it means the first disk information, and if it is "15h", it means that it is the 16th disk information. Next, in order to record the location information of specific disc information, which is the main problem in the present invention, the present embodiment provides information for specifying the location of the first disc information for each speed and (N, N + 1 th byte). Offset pointer for each double speed recorded in the double speed, and information that specifies the position of the disk information related to the recording layer to which each double speed is applied (Layer 0,1,2,3 pointer recorded in the M, M + 1th byte). It is characterized by recording in the area and determined by a combination thereof.

The information designating the position of the first disc information for each speed is recorded as the 5th byte information of the disc information in the serial order form of the disc information in the same representation as the information indicating the sequence of the disc information. 00h "," 03h ", etc.), and information specifying the position of the disc information related to the recording layer to which the respective double speeds are applied is specified as the number added in the first positional information for the corresponding double speed.

In addition, in the embodiment of Fig. 4, the allowable speeds are indicated as 1x speed (1X), 2x speed (2X), 3rd speed (3rd X), and 4th speed (4th X). The double speed (3rd X) can be designated as 4 times speed, and the 4th double speed (4th X) can be specified as 6 times speed. In addition, it is preferable to record the N, N + 1th byte in which double speed information is recorded in the 14th, 15th byte in order to maintain compatibility between the same series discs. It would be desirable to write to the 18th and 19th bytes.

4, the specific byte (N, N + 1) in the disk information is first divided by four bits, and the position of the first disc information per allowable speed is recorded in each of the four bits. The position of the first disc information per allowable speed is the same as the information about the serial order of the disc information recorded in the fifth byte. In addition, since two bytes of N and N + 1 are allocated, up to four double speeds can be expressed. If you have more than 5 different speeds, you can add the number of bytes as N, N + 1, N + 2 ---. (Another way of expanding bytes is also described in detail in other embodiments of the present invention of FIG. 7.)

In addition, the position information of the recording layer to which each double speed is applied is recorded in the other bytes (M, M + 1) in the disc information, which is to designate the number added in the first disc information for each double speed. This makes it possible to express both the position of the first disc information at each speed and the position of the recording layer to be applied at the same speed, making it possible to express the positions of 16 disc information as a total of 4 bytes.

In the case of applying the above-described embodiment, if position information indicating specific (one) disk information is always simply assigned by one byte to an empty area of the disk information, even if only 16 disk information are required, 16 bytes are required. There is an advantage that can solve the problem that can not specify the location information of all the disk information in the extended standard.

FIG. 5 is an example of a method of expressing 16 disc information in total and having 16 disc informations in which 4 disc speeds and 4 disc speeds are applied to each disc speed, and expressing position information of these disc information. As the third speed is 4 times, the fourth speed is 6 times. In the N, N + 1th bytes in all the disc information, the position of the first disc information for each predetermined speed is pre-assigned by 4 bits. Therefore, "0000b", the upper 4 bits of the Nth byte, means to specify the position of the first disk information at 1x speed, which becomes the disk information corresponding to "00h" as the serial number, and the lower 4th of the Nth byte. The bit "0100b" designates the position of the first disk information at double speed, which is the serial information of the disk information corresponding to "04h", and the upper four bits of the N + 1 byte are "1000b". It means to designate the position of the first disk information about 4x speed, which is the disk information corresponding to "08h" as the serial number, and "1100b", the lower 4 bits of N + 1th byte, is the first disk about 6x speed. It is meant to specify the location of the information, which is the disk information corresponding to "12h" as the serial number.

In addition, in the M, M + 1 th byte, information specifying the position of the recording layer to which each double speed is applied is recorded. In this embodiment, a total of four recording layers (Layer 0, 1, 2, 3) are supported. "0000b", the upper 4 bits of the first byte, designates the position of the first recording layer L0 at double speed, and "0001b", the lower 4 bits of the Mth byte, designates the position of the second recording layer L1 at double speed. In the upper 4 bits of the M + 1 th byte, "0010b" designates the position of the third recording layer L2 at double speed, and the lower 4 bits of the M + 1 th byte, "0011b", is assigned the fourth time per double speed. The position of the recording layer L3 is specified. In the above description, the recording layer information means the number added from the first position information for each speed. For example, if the recording layer position information is "0000b" (L0), the number added is "0". If the number is " 0010b " (L2), the added number is " 2 ", which means the next second disk information in the first disk information for each corresponding speed.

Therefore, if the system wants to check the 4x speed disc information of the third recording layer, first the position of the 1st disc information for 4x speed is determined from the upper 4 bits of the N + 1th byte ("08h"), and then Then, the position of the recording layer for the corresponding double speed is confirmed from the M + 1th upper 4 bits, which becomes the next third disc information from the first disc information position ("08h") of the fourth speed, and finally The position of the disc information is the disc information with serial number " 11h ".

6 shows an example of a method of expressing two pieces of recording information and four different speed information for each recording layer so that there are a total of eight pieces of disc information and the positional information of these pieces of information is shown in FIG. to be. The detailed expression method is the same as in the case of Fig. 5, and is omitted. However, in this embodiment, when there are only two recording layers, the M + 1th byte having information on the third recording layer and the fourth recording layer is required. Since there is no information, these areas are set to "1111b", and when the information of "1111b" is detected, the system recognizes that the corresponding recording layer does not exist.

Fig. 7 shows another embodiment of recording disc information of an optical disc according to the present invention. This embodiment extends the concept of the previous embodiment (Fig. 4) and is applicable in the case where a double speed or recording layer is added.

That is, the embodiment of Fig. 4 uses four bytes to specify a position of up to four recording layers and disc information for designating up to four different double speeds for each recording layer, or at least one of the number of recording layers and the double speed. If there are five or more, it cannot be expressed, and in this embodiment, the present invention is to solve this problem by allocating additional bytes in the disk information. For convenience of explanation, the initial 4 bytes (N, N + 1, M, M + 1) are designated as the first group field, and the additional 4 bits (X, X + 1, Y, Y + 1) are deleted. It is called 2 group field.

The recording method of the second group field to be added is the same as the recording method of the first group field, and the information designating the position of the first disc information for each additional speed is added and the 5th to 8th speed recorded in the (X, X + 1st byte). Offset pointer), and the information (Layer 4, 5, 6, 7 pointers recorded in the Y, Y + 1 th byte) specifying the position of the disk information related to the additional recording layer to which each double speed is applied is stored in a separate area. Recorded and determined by a combination thereof.

Also, in the present embodiment, for compatibility between discs of the same series, it is preferable to record the N, N + 1th bytes in which the information for each speed is recorded as the first group field in the 14th and 15th bytes, and the recording layer information is recorded. It is preferable to record the M, M + 1th byte in the 18th, 19th byte, and the X, X + 1th byte in which the information of the double speed is recorded as the second group field in the 20th, 21st byte. Preferably, the Y, Y + 1 th byte in which the recording layer-specific information is recorded is preferably recorded in the 22, 23 th byte.

In the reserved area of the disc information, information supporting the use of the first and second group fields is recorded in one byte. For example, use the 7th byte in the disk information and name it "using byte for DI Frame pointer". In this field, use only the first group field (N, N + 1, M, M + 1th byte) for disk. When specifying the location information of the information, the first group field (N, N + 1, M, M + 1st byte) and the second group field (X, X + 1, Y, Y +) are set to "0000 0000b". When the location information of the disk information is designated using all of the first byte), it is set to "0000 0001b" so that the byte (group field) for the location information currently being used can be checked.

Therefore, if the double speed and the number of recording layers are four or less, only the first group field is used, and the second group field is set to "zero", and the seventh byte is recorded as "0000 0000b". If five or more pieces of information are required for any of the number of recording layers, both the first and second group fields may be utilized, and the seventh byte may be recorded as "0000 0001b". That is, if all of the first and second group fields are used, a total of 32 disc information can be designated, and bits not used in each byte are set to "1111b" to distinguish them from other information.

8 relates to a recording / playback apparatus for an optical disk to which the present invention is applied, and the recording / playback apparatus includes a recording / playback section 10 for performing recording / reproducing on an optical disk and a control section 20 for controlling the recording / playback section. The control unit issues a recording or reproducing command to the specific area to the recording and reproducing unit, and the recording and reproducing unit performs recording and reproducing to the specific area according to the command of the control unit. Specifically, the recording and playback section 10 includes an interface section 12 for communicating with the outside, a pickup section 11 for directly recording or reproducing data on an optical disc, and a playback signal received from the pickup section. A data-processor 13 for restoring a signal value or modulating a signal to be recorded into a signal recorded on an optical disk, and transferring the data-processor 13 to pick up a signal accurately from the optical disk or to accurately record a signal on the optical disk. A servo unit 14 for controlling the unit 11, a memory 15 for temporarily storing various information and data including management information, and a microcomputer 16 for controlling the components in the recording / reproducing unit. have.

Referring to the search process of the disc information of the optical disc according to the present invention in detail, first, when the optical disc is loaded into the recording / playback apparatus, all the management information in the disk is read out and temporarily stored in the memory 15 in the recording / reproducing section. It is utilized during recording and reproducing on the optical disc. In particular, the management information stored in the memory also includes the disc information of the present invention. Therefore, the recording layer information and the speed information recorded in the disc information and the recording related information suitable for the corresponding speed are also read out and stored temporarily in the memory. At this time, since the position information of the disc information is recorded in all the disc information, the microcomputer knows the position information of all the disc information even if only one of the disc information is read, and from this, the disc information related to the desired speed information in the desired recording layer. It is easy to obtain. That is, if there is a plurality of disk information, the memory can reduce the time load required to search all the disk information each time. As a result, the recording and reproducing unit acquires the disc information whose position has been confirmed for the recording command of the control unit 20 whenever necessary, and executes the recording command with quick processing by using the recording related information (write strategy, etc.) recorded in the disc information. Done.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The present invention has proposed various methods for recording disk information corresponding to high speed in a high density optical disk, and a method of recording position information for easily identifying the disk information, and through this, standardized disk information can be easily used. In addition, there is an advantage that can efficiently cope with the recording and playback of the optical disk.

Claims (20)

A method of recording disc information in a management area of an optical disc having at least one recording layer, Separate disc information for each acceptable recording layer and double speed; And the information specifying the position of the first disc information per allowable speed and the information specifying the position of the disc information of the allowable recording layer are separately recorded in the disc information. The method of claim 1, And a disc information recording method for identifying the desired disc information position by combining the information specifying the position of the first disc information per allowable speed and the information specifying the position of the allowable recording layer. The method of claim 1, And the information for designating the position of the first disc information per allowable speed is information indicating a sequence of the disc information of the disc information. The method of claim 3, wherein And information for designating the position of the disc information of the allowable recording layer is specified by the number added in the first position information for each corresponding speed. The method of claim 1, And the information specifying the position of the first disc information per allowable double speed and the information specifying the position of the disc information of the allowable recording layer are recorded by allocating 4 bits. The method of claim 5, The information indicating the position of the first disc information per allowable speed and the information indicating the position of the allowable recording layer can be displayed up to four different information by allocating two bytes each. How to record information. The method of claim 6, The position of up to 16 disc information can be designated through the information specifying the position of the first disc information per allowable speed and the position of the disc information of the allowable recording layer indicated by using the 4 bytes. Disc information recording method for an optical disc, characterized in that. The method of claim 5, The information specifying the position of the first disc information per allowable double speed and the information specifying the position of the disc information of the allowable recording layer are each assigned 4 bytes so that up to 8 different information can be displayed. How to record disc information. The method of claim 8, The position of up to 32 disc information can be designated through the information specifying the position of the first disc information per allowable speed and the information indicating the position of the disc information of the allowable recording layer indicated by using the 8 bytes. Disc information recording method for an optical disc, characterized in that. A method of recording disc information in a management area of an optical disc having at least one recording layer, Separate disc information for each acceptable recording layer and double speed; In the disc information, a first group field for separately recording information for specifying the position of the first disc information per allowable speed and information for specifying the position of the disc information in the allowable recording layer, and the first group field. Disc information of the optical disc, characterized in that additional recording of the second group field in the same manner as the first group field when at least one of the speed information and the recording layer information specified in How to record. The method of claim 10, And information indicating whether the first group field and the second group field are used in the disc information. The method of claim 10, And the information specifying the position of the first disc information per allowable speed and the information specifying the position of the disc information of the allowable recording layer are recorded by allocating 4 bits each. The method of claim 12, In the first group field, information specifying the position of the first disc information per allowable speed and information specifying the position of the allowable recording layer can be displayed for each of up to four different information by assigning two bytes each. Disc information recording method for an optical disc, characterized in that. The method of claim 13, And if at least one of the allowable double speed and the allowable recording layer becomes five or more, a second group field is additionally recorded. The method of claim 10, And a disc information recording method for identifying the desired disc information position by combining the information specifying the position of the first disc information per allowable speed and the information specifying the position of the allowable recording layer. The method of claim 10, And the information for designating the position of the first disc information per allowable speed is information indicating a sequence of the disc information of the disc information. The method of claim 10, And information for designating the position of the disc information of the allowable recording layer is specified by the number added in the first position information for each corresponding speed. In an optical disc having at least one recording charge having a recordable area and a prerecorded and non-recordable area, In the pre-recorded area, disc information is provided separately for the allowable recording layer and the speed, and the disc information includes information for designating the position of the first disc information per allowable speed and the position of the disc information of the allowable recording layer. And the information designating the information is recorded separately from each other. A method of searching for a position of disc information related to a specific speed of a specific recording layer recorded in a management area of an optical disc having at least one recording layer, Reproducing a management area in which a plurality of disc information is recorded; Identifying the position of the desired disc information from the first reproduced disc information in the management area, wherein the disc information includes information designating the position of the first disc information per allowable speed and disc information of the allowable recording layer. The information specifying the position of the disc is recorded separately from each other, and the disc information search method for an optical disc, characterized in that the desired disc information is identified by combining these information. A control unit for transmitting a recording command, Receiving the recording command and performing recording according to the recording command, the disc information recorded separately for each recording layer and the speed in the management area of the optical disc is read out, and at a specific speed of the specific recording layer recorded in each disc information. A recording which reads out location information designating the location of the relevant disc information, and performs recording using the record related information recorded in the checked disc information while confirming the location of the disc information related to a specific recording layer and the speed from the location information; An optical device recording and reproducing apparatus, comprising: a reproducing section.