KR20060022523A - Method for recording write-protection information on optical disc write once and method and apparatus for recording/reproducing data on/from the disc - Google Patents

Abstract

The present invention relates to an optical disc and a method of recording recording control information of an optical disc, and an optical disc recording and reproducing method and apparatus using the same, particularly in an optical disc in which a predetermined recording section can be set for continuous recording. And independently recording the first recording control information (WP_flag_TDDS) for determining whether to prohibit recording for the interval and the second recording control information (WP_flag_SRRI) for determining whether to prohibit recording for each recording section. It is possible to make specific judgments about whether additional recording is possible by a specific recording section (ie, SRR) and whether logical overlap (LOW) is possible, and thus, there is an advantage in that an efficient disk can be utilized.

Optical disc, BD-WO, write prohibited, write protection, SRR, SRRI, LOW

Description

Method for recording write-protection information on optical disc write once and method and apparatus for recording / reproducing data on / from the disc}

Fig. 1 shows the entire structure of a writeable optical disc of the present invention and a method for recording disc management information.

FIG. 2 shows an example in which the first recording control information Wp_flag_TDDS and the second recording control information WP_flag_SRRI are recorded in the writeable optical disc of the present invention.

Fig. 3A shows an example of the type and setting state of the recording section SRR in the write once optical disc of the present invention;

3B to 3C show an SRRI and SRR entry structure in which the second recording control information WP_flag_SRRI of the present invention is recorded;

4A to 4B show a flowchart and a table of an optical disc recording and reproducing method using the recording control information WP_flag_TDDS and WP_flag_SRRI according to the present invention;

Fig. 5 shows a recording / reproducing apparatus of the write once optical disc of the present invention.

-Description of the main parts in the drawing-

10: recording and playback section 11: pickup

12 control unit 13 signal processing unit

15: memory 16: microcomputer

17: AV decoder 18: AV encoder

The present invention relates to a method of recording recording control information of an optical disc which can be recorded once, and a method and apparatus for recording and reproducing an optical disc using the same.

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 (BD), which can record and store high-quality video data and high-quality audio data for a long time, have been developed. .

Blu-ray Disc (BD), 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.

Various standard proposals related to Blu-ray Discs (BDs) are being prepared, and standards for Blu-ray Discs (BD-Rs) that can be written once are prepared following the rewritable Blu-ray Discs (BD-RE).

In particular, the standard recording method of a write once Blu-ray Disc (BD-R) has been discussed, the recording method of the disc and the recording control method according thereto, which represents the characteristics of the write once Blu-ray Disc (BD-R) It is essential to the efficient use of the disk.

However, in the write-once Blu-ray Disc (BD-R), the standard proposal for the recording control method according to the recording method has not been completed yet, so it is difficult to develop a product using the same.

Accordingly, the present invention has been made in view of the above circumstances and is intended to provide a method for recording disc recording control information on an optical disc that can be written once, and in particular, whether to prohibit recording or allow recording for each recording section of the disc. It is an object of the present invention to provide a method and apparatus for recording and reproducing an optical disc using the same, and providing information for identifying the information.

The recording control information recording method of a write-once optical disc according to the present invention for achieving the above object, in the optical disc that can be set a predetermined recording section for continuous recording, whether or not recording is prohibited for the entire recording section; The first recording control information WP_flag_TDDS to be determined and the second recording control information WP_flag_SRRI for determining whether to prohibit recording for each recording section are independently recorded.                     

In addition, the recording interval set for the continuous recording is preferably SRR (Sequential Recording Range).

The first recording control information WP_flag_TDDS and the second recording control information WP_flag_SRRI are preferably recorded in TDMA as 1-bit flag information.

In addition, the write once optical disc according to the present invention includes a data area in which a predetermined recording section is set for continuous recording, first recording control information (Wp_flag_TDDS) for determining whether or not to record the entire recording section. A management area for independently recording second recording control information (WP_flag_SRRI) for determining whether to prohibit recording for each recording section is provided.

Further, in the recording / reproducing method of the write once optical disc according to the present invention, a predetermined recording section SRR is set for continuous recording, and the first recording control information Wp_flag_TDDS determines whether to prohibit recording for the entire recording section. ) And when the first recording control information WP_flag_TDDS means recording prohibition in recording and reproducing the optical disk on which the second recording control information WP_flag_SRRI for determining recording prohibition for each recording section is recorded. If the recording of the entire recording section is prohibited and the first recording control information WP_flag_TDDS means recording is allowed, the corresponding recording is performed according to the setting state of the second recording control information WP_flag_SRRI and the type of the recording section SRR. It is characterized by determining whether or not to record in the section.

In addition, the recording / reproducing apparatus of the optical disc of write once type according to the present invention includes a first recording control information (Wp_flag_TDDS), in which a predetermined recording section SRR is set for continuous recording, and which determines whether or not recording is prohibited for the entire recording section. Recording and reproducing the optical disc on which the second recording control information (WP_flag_SRRI) is recorded, which determines whether or not recording is prohibited for each recording section, the pickup for reading out the signal recorded in the disc, and the first recording control through the pickup. Read information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI), and from the read information includes a microcomputer to confirm whether or not additional recording and / or logical overlapping recording (LOW) in a specific recording section (SRR) And a control unit for transmitting a recording or reproducing command for a specific recording section to the recording and reproducing unit based on a result of the confirmation of the recording and reproducing unit. Shall be.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a disc recording control information recording method of a write once optical disc according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, a case of a write once Blu-ray Disc (BD-WO) will be described 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.

In this context, the term "recording control information" used in the present invention means information that can identify whether to allow or prohibit recording for the entire disc or a part of the disc, and generally refers to the "Write Protection flag". (WP_flag) ". The present invention will classify the recording control information (WP_flag) according to the purpose and name the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI), and a method of recording the recording control information on a disk and utilizing the same A detailed description of one recording and reproducing method will be described later.

In addition, the term "recording section" used in the present invention refers to an area allocated to support a sequential recording mode (SRM) in the disk data area, which is called "SRR" in the Blu-ray disc BD. (Sequential Recording Range) ". Further, the information on each SRR is recorded as " SRRI (SRR Information) " in the disc management area.

In addition, the term "session" of the term used in the present invention is a term used to collectively apply the concept used in the SRR is composed of at least one, in particular for compatibility with the playback-only specification (BD-ROM). . The structure and recording method of the SRR and the SRRI and the session will be described later in detail with reference to FIGS.

In addition, the term "LOW (Logical OverWrite)" used in the present invention refers to a logically superimposed recording method of a write once Blu-ray Disc (BD-R), and generally refers to a write once disc. In this case, rewrite (or overwrite) is not physically allowed for the area recorded once because of the one-time characteristic of recording, but in the write once-only Blu-ray Disc (BD-R), the rewrite is made for the already recorded area. When a user or system requests to perform a superimposed recording, the data to be recorded in the desired area to be rewritten is alternatively recorded in another recordable area on the disc, and then the recorded fact is recorded as management information. With Doom, it is possible for the user to provide the same effect as performing a rewrite on an area that has already been recorded, especially in physical In case the record is a named logical overwrite (LOW).

1 shows the structure of a write-once disc (BD-R) to which the present invention is applied and various types of management information recorded in the disc. In particular, a single layer disc having one recording layer is shown. For example.

According to the structure of the disc, a lead-in area and a lead-out area for recording management information, the lead-in area and a lead-out area A data area for recording user request data is provided between the areas. In addition, the data area may include a spare area (ISA0 / OSA0) for alternately recording a defective area in the data area for physical defect management, and includes a temporary disc management area for recording disk management information; A " TDMA " is provided in the lead-in area and OSA0.

In general, in the case of an optical disc capable of repeatable recording, even if only a limited size of a disc management area (hereinafter referred to as "DMA") is provided, the writing and erasing can be repeated in this area as much as possible. Although a large amount of DMA is not required, in the case of an optical disc that can be written once, once a recorded area cannot be used for recording again, a larger management area is required for disc management. If the above is not recorded, the process of transferring the final TDMA information to the DMA is required. Therefore, this information is named as TDMA (Temporary DMA) to distinguish it from DMA.

1 shows that there are two types of TDMAs, firstly, TDMA0 assigned to a fixed size in the lead-in area, and secondly assigned to the size of the spare area OSA0 in conjunction with the size of the spare area. TDMA1. In this regard, the size P of TDMA1 is, for example, P = (N * 256) / 4, so that about one quarter of the total outer spare area OSA0 size is suitable.

Each TDMA0 and TDMA1 includes temporary defect list information (hereinafter referred to as "TDFL") and temporary disc definition structure (hereinafter referred to as "TDDS") information in one recording unit (BD case). "Cluster") (TDFL + TDDS) or SRRI and TDDS are recorded in another recording unit (cluster) (SRRI + TDDS).

In this regard, the TDFL refers to information for managing a process of replacing a spare area with a spare area when a defective area is generated in the data area, and having a size of 1 to 4 clusters according to the size of the defect list. do.

In addition, the SRRI is information indicating the recorded or unrecorded state of the SRR in the disk. In particular, the SRRI is recorded only when the disk is in the continuous recording method (SRM), and the TDDS records important information for general management and defect management of the disk. Whenever management information is updated in TDMA, it is always written to the last of the 32 sectors in the cluster.                     

FIG. 2 illustrates a method of recording the first recording control information WP_flag_TDDS and the second recording control information WP_flag_SRRI associated with the present invention in the disk structure of FIG.

In relation to the above, as described above, the recording control information (WP_flag) of the present invention is classified into two types. First, information is used to control whether or not recording of the entire SRR in the disk is prohibited, and the information is recorded in the TDDS. For convenience of description, this is referred to as first recording control information or "WP_flag_TDDS". The next second is information for controlling whether to prohibit recording for each SRR, and this information is recorded in the SRRI, which is referred to as second recording control information or "WP_flag_SRRI" for convenience of description.

That is, specifically, if "WP_flag_TDDS = 1b", recording to the disk data area (including LOW) except for TDMA is prohibited, and if "WP_flag_TDDS = 0b", recording to the disk data area (Data Area) is permitted. . In addition, if "WP_flag_SRRI = 1b", writing to the corresponding SRR (including LOW) is prohibited. If "WP_flag_SRRI = 0b", writing to the SRR is allowed.

In relation to this, the structure of the SRRI in which the "WP_flag_SRRI" is recorded will be described in detail as follows.

The SRRI consists of three parts, which are headers for recognizing that they are SRRIs, a list of SRR entries indicating the recording status of each SRR, and an end indicating the end of the SRRI. It consists of a display part (SRR List Terminator).                     

First, the header is located at the head of the SRRI, and in addition to the "SRRI identifier" field for recognizing the SRRI, the "List of opened SRR" field indicating the position of the open SRR present in the corresponding SRR information (open SRR) The meaning is described later with reference to FIG. 3A), and includes information such as a "Number of SRR entries" field indicating the total number of SRRs and a "Number of opened SRR" field indicating the number of open SRRs. You will be able to see the contents of the entire SRRI before reading.

After the header, the SRR entry list is recorded, and when the SRR entry list ends, the SRR end display unit displays the end of the SRR information. Particularly, when the SRR information has a variable size, the SRR end display unit may have meaning as information for indicating an end point of the corresponding SRR information.

Therefore, as the disk management information, the SRR information is composed of a header, an SRR entry list, and an SRR end indicator, and all of the information will be collectively recorded every update.

In this regard, "WP_flag_SRRI" of the present invention is recorded for each SRR entry in the SRR entry list. Hereinafter, the structure of the SRR entry list will be described in detail.

First, the type of SRR and the recording method using the SRR will be described with reference to FIG. 3A. There are two types of SRRs. SRRs that can be additionally written are called open SRRs, and SRRs that are no longer additionally recorded are called closed SRRs. In FIG. 3A, SRR # 3 and # 5 show an open SRR, and SRR # 1, # 2 and # 4 show a closed SRR.

All SRRs have address information about the last recorded area in the SRR (called "LRA: Last Recorded Address"). Especially in the case of open SRR, additional recording is possible after LRA. Writable Address) "information can be inferred. Closed SRRs that can no longer be appended to are not inferred by the NWA.

There can be up to 16 open SRRs in the disk, and it can be checked from the "List of SRR numbers" in the SRRI header of FIG. 2, which SRRs are allocated among the allocated SRRs.

 In addition, there is a session as a recording unit including at least one SRR, and in the disk, only an outermost session is an "open session" that can be recorded. Therefore, in FIG. 3A, session 2 becomes an open session, and session 1 becomes a closed session. In particular, when closing a particular session, all SRRs in the session must also be closed. For example, SRR # 1 in session 1 becomes a closed SRR as session 1 closes, although there is still an additional recordable area.

In other words, since the record can be recorded only in the open session, the open SRR will exist only in the open session (SRR # 3, # 5). However, not all SRRs in an open session become open SRRs, and sometimes a closed SRR may occur even if recording is completed in the SRR or a recordable area remains due to a user's close command (for example, SRR #). 4).                     

FIG. 3B illustrates a list of SRR entries in an SRRI structure. The SRR entry list means that a plurality of SRR entries are collected.

In relation to this, one SRR entry is composed of 8 bytes to express the recording status of each SRR on the disk. The SRR entry includes the status information of the SRR and the start of the SRR. It includes address information (Start address of SRR) and last position information (LRA of SRR) in which data is recorded in the corresponding SRR.

FIG. 3B illustrates one SRR entry structure in detail. In particular, 4-bit " Status " information is information indicating the status of the SRR, one bit of which is the second recording control information WP_flag_SRRI of the present invention. Are utilized. That is, as described above, if "WP_flag_SRRI = 1b", it is used as information forbidding the recording to the corresponding SRR, and if "WP_flag_SRRI = 0b", it is used as information to allow recording to the corresponding SRR.

Regarding this, the "WP_flag_SRRI" is information set in all SRRs regardless of the type of SRR (open or closed SRR). Hereinafter, an example in which the "WP_flag_SRRI" information is utilized will be described.

If "WP_flag_SRRI = 1b" is set in the open SRR, this means that the SRR is a state in which no additional recording is possible even though the open SRR. That is, in general, it is possible to prohibit additional recording in the corresponding SRR by changing the open SRR to a closed SRR, but once the change is made to closed SRR, it is impossible to return to the open SRR again. Will be particularly useful in That is, since "WP_flag_SRRI" and "WP_flag_TDDS" can be updated at any time, even if it is initially set to "WP_flag_SRRI = 1b", an update to "WP_flag_SRRI = 0b" later becomes an open SRR that can be rewritten.

In addition, if "WP_flag_SRRI = 0b" is set in the closed SRR, it means that the logical overlapping (LOW) is possible even though the corresponding SRR is a closed SRR. That is, in general, the closed SRR is an area in which no more recording is possible, but since this means that additional physical recording is prohibited, the above-mentioned LOW (logical overlapping recording) will not be prohibited. Therefore, when "WP_flag_SRRI = 0b" is set in the closed SRR, it means that LOW is possible in the corresponding closed SRR area. However, when "WP_flag_SRRI = 1b" is set, it means that LOW is also prohibited in the closed SRR area.

In addition, 1 bit of "Status" information in the SRR entry is used as the session information (S flag). If "S flag = 1b", the corresponding SRR means the start SRR of the session, and if "S flag = 0b", SRR means that it is not the beginning SRR of the session.

That is, in FIG. 3A, the SRR entry for SRR # 1 and SRR # 3 will be set to "S flag = 1b", and the SRR entry for SRR # 2, SRR # 4 and SRR # 5 will be set to "S flag = 0b". Will be set to

In relation to this, if the user wants to set the recording prohibition for a specific session, it may be set to "WP_flag_SRRI = 1b" for all SRRs in the session.

4A and 4B are a flowchart (FIG. 4A) and a table (FIG. 4B) showing a disc recording / reproducing method according to the present invention.

When the disc is loaded, the value of "WP_flag_TDDS" recorded in the latest TDDS information is checked (S10). That is, in the case where " WP_flag_TDDS = 1b " is set, recording (including LOW) in the data area (i.e., all SRRs) excluding the TDMA of the disc is prohibited (S101) regardless of the value of "WP_flag_SRRI". If it is set to "WP_flag_TDDS = 0b", the recording control for the corresponding SRR is different according to the type of SRR and the value of "WP_flag_SRRI". First, if "WP_flag_SRRI = 1b", it is correlated with the open / closed SRR. Without this, recording (including LOW) is prohibited in the SRR (S201).

However, if "WP_flag_TDDS = 0b" and open SRR, if "WP_flag_SRRI = 0b", both the recording and LOW will be allowed for the open SRR (S202), and if "WP_flag_TDDS = 0b" and closed SRR, If WP_flag_SRRI = 0b ", additional writing is prohibited in the closed SRR (which is prohibited by the definition of the closing SRR), but logical overlapping (LOW) is allowed (S203).

5 relates to an optical disc recording and reproducing apparatus to which the present invention is applied, and the recording and reproducing apparatus is largely composed of a recording and reproducing unit 10 for recording data on or reproducing the recorded data and a control unit 12 for controlling the same. Lose.

In particular, the recording and reproducing section 10 receives the signal read out from the pickup section 11 and the pickup section 11 for directly recording data on the optical disk or reading the data recorded on the optical disk, and restore the desired signal value, A signal processor 13 for modulating and transmitting a signal to be recorded into a signal recorded on an optical disc, and a servo controlling the pickup unit 11 to accurately read a signal from the optical disc or to accurately record a signal on the optical disc. The unit 14, a memory 15 for temporarily storing various information and data including management information, and a microcomputer 16 for controlling the above components are basically configured. In this regard, a recording / reproducing apparatus composed of only the recording / reproducing section 10 is also called a “drive”, and is used as a computer peripheral device.

In particular, when the optical disc is loaded, the microcomputer 16 checks the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI) recorded in the TDDS and the SRRI through the pickup 11, and records each disc by the SRR. It is determined whether it is possible and whether it is LOW, and the determined result is reported to the controller 12.

In addition, the control unit 12 receives information on whether or not recording is possible for each SRR from the microcomputer 16, and also records and reproduces a recording and reproducing command for recording or reproducing data on the optical disc with reference to a user command or the like. It is transmitted to the unit (10).

In addition, the decoder 17 decodes a signal read out from the optical disc under control of the controller 12, restores the signal to desired information, and provides the same to the user.

In addition, the encoder 18 converts an input signal into a signal of a specific format, for example, an MPEG2 transport stream, under the control of the control unit 12 to perform a function of recording a signal on an optical disc, and then transmits the signal to the signal processing unit 13. Will be provided.

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.

 According to the recording control method of an optical disc of write once type according to the present invention, it is possible to make a concrete judgment on whether or not a specific recording section (SRR) can be recorded in a disc and whether LOW can be performed. There are advantages to getting lost.

Claims (16)

An optical disc in which a predetermined recording section can be set for continuous recording, Recording the first recording control information (WP_flag_TDDS) for determining whether to prohibit recording for the entire recording section and second recording control information (WP_flag_SRRI) for determining whether to prohibit recording for each recording section; A recording control information recording method of a recordable optical disc. The method of claim 1, And the first recording control information (WP_flag_TDDS) is recorded in the TDDS in the TDMA. The method of claim 1, And a recording section set for the continuous recording is a sequential recording range (SRR). The method of claim 1, And the second recording control information (WP_flag_SRRI) is recorded in SRRI in TDMA. The method of claim 4, wherein And the second recording control information (WP_flag_SRRI) is recorded in each SRR entry in the SRRI. The method of claim 1, And the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI) are recorded as one bit of flag information. The method of claim 1, And the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI) can be updated to change setting values after initial setting. A data area in which a predetermined recording section is set for continuous recording; And a management area for independently recording first recording control information (Wp_flag_TDDS) for determining whether to prohibit recording for the entire recording section and second recording control information (WP_flag_SRRI) for determining whether to prohibit recording for each recording section. A write once optical disc. The method of claim 8, And the management area is a TDMA (Tempoary Disc Management Area) in which the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI) are recorded. A predetermined recording section SRR is set for continuous recording, and first recording control information Wp_flag_TDDS for determining whether to prohibit recording for the entire recording section and second recording control information for determining whether to prohibit recording for each recording section. In recording and reproducing an optical disc on which (WP_flag_SRRI) is recorded, If the first recording control information WP_flag_TDDS means recording is prohibited, recording of the entire recording section of the corresponding disk is prohibited; When the first recording control information WP_flag_TDDS means recording permission, determining whether to prohibit recording in the corresponding recording section according to the setting state of the second recording control information WP_flag_SRRI and the type of the recording section SRR. A recording / reproducing method of a write once optical disc. The method of claim 10, The recording prohibition method includes a prohibition of logically overlapping recording (LOW). The method of claim 11, If the recording section is an open SRR and the first recording control information WP_flag_TDDS is allowed to be recorded and the second recording control information WP_flag_SRRI is prohibited from recording, additional recording and logical overlapping recording for the open SRR are LOW. Recording and reproducing method of an optical disc of write once type, which is prohibited. The method of claim 11, If the recording section is an open SRR, and both the first recording control information (WP_flag_TDDS) and the second recording control information (WP_flag_SRRI) are allowed to record, the additional recording and the logical overlapping recording (LOW) for the open SRR are allowed. A recording / reproducing method of a write once optical disc. The method of claim 11, If the recording section is closed SRR and the first recording control information WP_flag_TDDS is allowed to be recorded, but the second recording control information WP_flag_SRRI is prohibited from recording, additional recording and logical overlapping recording of the closed SRR is performed (LOW). Recording and reproducing method of an optical disc of write once type, which is prohibited. The method of claim 11, If the recording section is closed SRR, and both the first recording control information WP_flag_TDDS and the second recording control information WP_flag_SRRI are allowed to be recorded, additional recording of the closed SRR is prohibited, and the logical overlapping recording LOW is A recording and reproducing method of an optical disc of write once type, characterized in that allowed. A predetermined recording section SRR is set for continuous recording, and first recording control information Wp_flag_TDDS for determining whether to prohibit recording for the entire recording section and second recording control information for determining whether to prohibit recording for each recording section. In recording and reproducing an optical disc on which (WP_flag_SRRI) is recorded, A pickup for reading out a signal recorded in the disc, and the first recording control information WP_flag_TDDS and the second recording control information WP_flag_SRRI are read out through the pickup, and the information is read out from the read information in a specific recording section SRR. A recording and reproducing unit including a microcomputer for checking whether additional recording and / or logical overlapping is possible; And a control unit which transmits a recording or reproducing command for a specific recording section to the recording and reproducing unit based on the result of the confirmation of the recording and reproducing unit.

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