KR100976473B1 - Optical disc and recording method of Disc Information of optical disc - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention 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. A recording method, comprising: reading disc information including position information having a first pointer indicating a position of first disc information per allowable recording layer; Identifying the position of the disc information for the requested recording layer based on the position information; And recording data in a specific area of the optical disc based on the disc information indicated by the positional information, thereby making it possible to easily use standardized disc information, and to record the optical disc. There is an advantage that can efficiently cope with the reproduction.

Optical Disc, Disc Information, Location Information, High Density

Description

Optical disc and recording method of disc information of optical disc}

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.

FIG. 7 shows an example of recording position information of four disc information according to the present invention as the embodiment of FIG.

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

FIG. 9 shows an example of recording position information of eight disc information according to the present invention as the embodiment of FIG.

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

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.

Various standard proposals regarding Blu-ray Discs have been prepared, and various standard proposals for a write once Blu-ray Disc (BD-WO) have been prepared following the rewritable 1-speed Blu-ray Disc (BD-RE).

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 disc information that can quickly acquire desired disc information related to a specific speed when recording and reproducing actual data on an optical disc using recorded disc information.

  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 recording layer, 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 recording layer and information for specifying the position of the disc information per allowable speed 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. And in the disc information, position information for designating a position of disc information related to a specific speed of a specific recording layer.

In addition, an optical disc of the present invention is an optical disc having at least one recording charge having a recordable area and a pre-recorded and non-recordable area, wherein the disc information is stored in the pre-recorded area at an allowable recording layer and at a double speed. In addition, the disc information is characterized in that the position information for designating the position of the disc information related to the specific speed of the specific recording layer is recorded in the disc information.

In addition, an optical disc of the present invention is an optical disc having at least one recording charge having a recordable area and a pre-recorded and non-recordable area, wherein the disc information is allowed in the pre-recorded area according to the allowable recording layer and double speed. And separately specifying information for specifying the position of the first disc information per allowable recording layer, and information for specifying the position of the disc information per allowable speed, in the disc information.

       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 management area recorded thereon, and identifying the position of the desired disc information from the first reproduced disc information in the management area.

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 specifying 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 recording layer and the speed from the position information. And a recording / playback section for acquiring the identified disk information whenever necessary and performing recording using the recording related information recorded in the 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 description, 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 by the recording layer and the allowable 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.

 Hereinafter, various embodiments of a method of recording location information and the like in the disc information will be described in detail with reference to FIGS. 4 through 10.

4, 5, 6 and 7 show one embodiment of recording disk information of an optical disk 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", the corresponding disk information means the disk information which is located first in each fragment of the corresponding disk. If "15h", the corresponding disk information is found in each fragment of the corresponding disk. It means that it is the 16th disk information. Next, in order to record the positional information of the specific disk information which is the main problem in the present invention, apart from the above-described fifth byte information, the present embodiment designates the positional information of the disk information for specifying the position of the first disk information for each recording layer. Information specifying (L0,1,2,3 start frame recorded in the N, N + 1th byte), and the position of the disc information related to the allowed double speed for each recording layer (in the M, M + 1th byte). The recorded 1X, 2X, 4X, and 8X frame pointers) are recorded in a separate area and determined by a combination thereof.

In detail, first, the specific byte (N, N + 1) in the disc information is divided by 4 bits, and the position of the first disc information of the allowable recording layer is recorded in each of the 4 bits. The position of the first disc information of the allowable recording layer is the same as the information on 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 recording layers can be represented. If there are five or more recording layers, the number of bytes may be added as N, N + 1, N + 2 ---.

The other byte (M, M + 1) in the disc information is assigned a position of double speed allowed for each recording layer for each recording layer. In this way, both the position of the first disc information for each recording layer and the position of a specific speed in the recording layer can be expressed, which makes it possible to express the positions of 16 disc information in total of 4 bytes.                     

In the case of applying the above-described embodiment, in the case where position information indicating specific (one) disk information is always allocated to an empty area of the disk information one byte at a time, the area in the disk information is insufficient. Even if only the disk information, there is an advantage that can solve the problem that can not allocate the location information of all the disk information.

FIG. 5 shows an example of a method of expressing the position information of these disk information, since there are four recording layers and four different speed information for each recording layer, so that there are 16 disk information in total. to be. In the N, N + 1th bytes in all the disc information, the position of the first disc information for each recording layer pre-qualified is assigned with 4 bits. Therefore, "0000b", which is the upper four bits of the Nth byte, designates the position of the first disk information of the first recording layer L0, which becomes the disk information corresponding to "00h" as the serial number, and the Nth byte. "0100b", which is the lower 4 bits of, designates the position of the first disk information of the second recording layer L1, which becomes the disk information corresponding to "04h" as the serial number, and the upper 4 of the N + 1th bytes. The bit "1000b" designates the position of the first disk information of the third recording layer L2, which becomes the disk information corresponding to "08h" as the serial number, and the lower 4 bits of the N + 1th byte "". 1100b " designates the position of the first disc information of the fourth recording layer L3, which becomes the disc information corresponding to “12h” in the serial number.

In addition, in the M, M + 1, and the 1st byte, information designating the positions of allowable speed information for each recording layer is recorded, and the present embodiment supports 1, 2, 4, and 8 times speed, so the upper 4 bits of the Mth byte are supported. "0000b" designates the position of the 1x speed disc information for each recording layer, and "0001b", which is the lower 4 bits of the Mth byte, designates the position of the 2x speed disk information for each recording layer, and M + 1th byte. The upper four bits of "0010b" designate the position of the 4x speed disc information for each recording layer, and the lower four bits "0011b" of the M + 1th byte designate the position of 8x speed disc information for each recording layer. .

Therefore, if the system wants to confirm the 8x speed disc information of the third recording layer, first the position of the first disc information of the third recording layer is identified from the upper 4 bits of the N + 1th byte ("08h"). Next, the position of the 8x speed disc information in the corresponding recording layer is confirmed from the M + 1st lower 4 bits, which becomes the last 4th disc information among the disc information of each recording layer, and the position of the disc information to be finally found is the serial number " 11h "disk information.

  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 N + 1th byte having information on the third recording layer and the fourth recording layer is required. In this area, the information is set to "0000b", and the system stores the information "0000b" in the area other than the area in which the first disk information for the first recording layer is recorded (the 4th byte of the Nth byte). When detected, it is recognized that the corresponding recording layer does not exist.

FIG. 7 shows an example of a method of expressing two pieces of recording information and two different speed information for each recording layer so that there are four pieces of disc information in total and position information of these pieces of disc information is represented. to be. The detailed expression method is the same as that of FIG. 5, and is omitted. However, in the present embodiment, only two recording layers exist, and only two double speeds per recording layer exist, and information about the third recording layer and the fourth recording layer is shown. Since the N + 1th byte which has the information and the M + 1th byte which has the information about the 4x and 8x speeds is unnecessary information, it is set to "0000b" in these areas, and the system records the first recording layer. When information of "0000b" is detected in an area other than the area in which the first disk information for the second disk is recorded (upper 4 bits of the Nth byte), it is recognized that the corresponding recording layer does not exist. If information of "0000b" is detected in a region other than the upper 4 bits of the first byte, it is recognized that the corresponding double speed is not an acceptable double speed.

8 and 9 show another embodiment of recording disc information of an optical disc according to the present invention.

Fig. 8 briefly shows the structure of the disc information for explaining the present embodiment. First, the order in which the disc information is arranged in each fragment of the disc for each disc information is determined by the serial number, which is 1 byte ( 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", the corresponding disk information means the disk information which is located first in each fragment of the corresponding disk. If "07h", the corresponding disk information is found in each fragment of the corresponding disk. It means that the disk information is located in the eighth position. Next, in order to record the location information of specific disc information, which is the main problem in the present invention, the present embodiment is characterized by designating one location information by combining a specific recording layer and a specific double speed.

In detail, first, four times of information about the first recording layer L0 are divided into four bits and recorded in a specific byte (N, N + 1) in the disc information, and another specific byte (M, M) is recorded. In +1), four double-speed information for the second recording layer L1 are divided and recorded by four bits. That is, the present invention relates to a method of directly designating the position of the disk information by 4 bits. According to the present embodiment, eight disk information are provided through N, N + 1, M, M + 1 bytes (total 4 bytes). It is possible to express the position information of.

This method designates eight pieces of disk information as four bytes, which has a lower byte efficiency than the previous embodiment as shown in FIG. 4, but has the advantage of directly expressing the location of the disc information without a combination of different information.

FIG. 9 shows an example of a method of expressing the position information of the disk information in which there are a total of eight disk information because there are two different recording speeds for each of the two recording layers and each recording layer according to the embodiment of FIG. to be. That is, information corresponding to the serial order of the disc information is recorded as positional information at positions previously prescribed for each recording layer and double speed in N, N + 1, M, M + 1 bytes in the disc information.

Fig. 10 relates to a recording / playback apparatus for an optical disk to which the present invention is applied, and the recording / playback apparatus is composed of a recording / playback section 10 for performing recording / reproducing on an optical disk and a control section 20 for controlling it. 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 of 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. In other words, 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 purposes 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 (15)

In the method of recording data on an optical disc, Reading disc information including location information having a first pointer indicating a location of first disc information per allowable recording layer; Identifying the position of the disc information for the requested recording layer based on the position information; And recording data in a specific area of the optical disc based on the disc information indicated by the positional information. The method of claim 1, The location information further includes a second pointer indicating the location of the disc information corresponding to the recording speed allowable for each recording layer, The recording of the data comprises: recording data at an acceptable recording speed based on the second pointer. delete The method of claim 1, And the first pointer and the second pointer are recorded separately from each other. In the recording and reproducing apparatus of an optical disc, An optical pickup for performing data recording and reproducing of the optical disk; A control unit for controlling the optical pickup to perform the data recording and reproducing on the basis of the disc information, The disc information includes position information having a first pointer indicating a position of the first disc information per allowable recording layer and associated recording related parameters; And the control unit checks the position of the disc information based on the positional information, and controls the optical pickup to perform the data recording and reproducing according to the recording related parameters included in the identified disc information. Disc recording and playback device. The method of claim 5, The location information further includes a second pointer for indicating a location of the disc information corresponding to the recording speed allowable for each recording layer, The first pointer and the second pointer are separately recorded in each of the disc information. And the control unit determines the position of the disc information related to the specific speed and the specific recording layer based on the position information. The method of claim 5, Further comprising a memory unit for storing the disk information, And the control unit reads the disc information stored in the memory unit and controls the optical pickup based on the read disc information. The method of claim 5, The optical pickup reads the disc information from the optical disc, And the controller controls the optical pickup based on the disc information read into the optical pickup. delete delete delete delete delete delete delete

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