KR20090036204A - Optical disc, method of recording management information of optical disc, and apparatus for recording data - Google Patents

Abstract

An optical disc, an optical disc management information recording method, and a data recording apparatus are provided to determine the closing of disc efficiently by recording data in a part of the first temporary disc management area where no indication information is recorded. A method for recording management information in an optical disc comprises a step of recording indication information which shows which TDMA(Temporary Disc Management Area) is in use among a plurality of TDMAs in a part of a first TDMA, and a step of recording data in the area where the indication information is not recorded within the part of the first TDMA in the closing of disc.

Description

Optical disc, optical disc management information recording method and data recording device {OPTICAL DISC, METHOD OF RECORDING MANAGEMENT INFORMATION OF OPTICAL DISC, AND APPARATUS FOR RECORDING DATA}

The present invention relates to an optical disc and a method of recording management information of an optical disc, and more particularly, to a method of recording management information of an optical disc that can be written once and an optical disc that can be written once.

BACKGROUND Optical discs 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. In this regard, various standard proposals related to Blu-ray Discs (BD) have been prepared, and a Blu-ray Disc (BD-R) that can be written once after a rewritable Blu-ray Disc (BD-RE) has been proposed.

In the case of a rewritable optical disc among such optical discs, rewriting can be performed in any area of the optical disc, and thus all regions of the optical disc can be used randomly regardless of a special recording method. Similarly, since recording, erasing, and rewriting are also possible in the disc management area (DMA), even if the size of the DMA is small, there is no problem. Therefore, in case of BD-RE, 32 clusters are allocated and used as DMA.

On the other hand, in an optical disc that can be written once (for example, BD-R), recording is limited only once in a specific area of the optical disc. In addition, even in a high-density write once disc such as a BD-R, a defect management method is one of the important issues when recording data.

Therefore, even in an optical disc that can be recorded once, a management area for recording defect management information and optical disc management information is required. In particular, in case of an optical disc that can be recorded once, recording of defect management and optical disc usage status information by recording characteristics is possible. More area is needed.

However, there is no uniform standard applicable to an optical disc (for example, BD-R) that can be written once while satisfying such a need. In other words, this situation cannot be solved in any of the currently recorded optical disc standards.

Accordingly, an object of the present invention is to provide a method of recording management information on an optical disc which can be written once.

Another object of the present invention is to provide an optical disc, an optical disc management information recording method, and a data recording apparatus capable of increasing the use efficiency of a plurality of temporary disc management areas (TDMAs) provided in an optical disc that can be written once. To provide.

In order to achieve the above object, an optical disc management information recording method according to the present invention indicates which TDMA of a plurality of TDMAs is used in a part of a first temporary disc management area (TDMA). Recording an indicator and recording data in a region in which the indication information is not recorded among some regions of the first TDMA.

The data may be disc definition structure (DDS) information, the data may be indication information, and the data may be indication information most recently used. In addition, the data may be dummy data.

The optical disc may include one recording layer and the recording layer may include three TDMAs.

The optical disc may include a first recording layer and a second recording layer, and each of the first recording layer and the second recording layer may include three TDMAs.

The optical disc may have a lead-in area, and the first TDMA may be located in the lead-in area.

On the other hand, an optical disc according to the present invention includes a plurality of TDMAs, and the plurality of TDMAs include a first TDMA in which indication information indicating which TDMA among the plurality of TDMAs is in use is recorded in a partial region thereof. One TDMA includes data recorded in a region where indication information is not recorded in some regions.

On the other hand, the data recording apparatus according to the present invention indicates an indication indicating which TDMA among a plurality of TDMAs is used in a recording unit for recording data on an optical disc and a partial region of the first temporary disc management area (TDMA). And a control unit for recording the information and controlling the recording unit to record data in a region in which the indication information is not recorded among some regions of the first TDMA when the disc is closed.

According to the optical disc and the management information recording method of the optical disc according to the present invention, there is an effect of increasing the use efficiency of TDMA provided in the optical disc which can be written once.

In addition, in an optical disk with few updates, the drive can efficiently determine whether the disk is closed, stable data reading can be performed, and the next available TDMA can be reliably determined.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Like parts in the drawings used like reference numerals throughout the drawings. For convenience of explanation, a Blu-ray disc that can be written once as an optical disc will be described as an example. Hereinafter, a recording apparatus is a device capable of recording or reproducing an optical disc of various standards, and depending on the design, it is possible to record and reproduce only an optical disc of a specific standard (for example, BD or HD-DVD).

1 is a schematic diagram showing the structure of a recording layer provided in an optical disc according to an embodiment of the present invention. As shown in FIG. 1, an optical disc according to an embodiment of the present invention includes one recording layer, and the recording layer is a lead-in area 100 formed from an inner circumference of the optical disc, and a data area. , 200) and a lead-out area 300.

The data area 200 includes an inner spare area ISA0 and an outer spare area OSA0 on an inner circumference and an outer circumference, respectively, and includes a user data area 210 formed therebetween.

Also, temporary disk management areas TDMA0, TDMA1, and TDMA2 are provided in the lead-in area 100, the inner spare area ISA, and the outer spare area OSA0, respectively. The optical disc according to the present embodiment includes three TDMAs.

Although not shown, a plurality of disc management areas DMA may be provided in the lead-in area 100 and the lead-out area 300. TDMA temporarily stores the defect management information and, and DMA permanently stores the defect management information and.

For example, when an optical disc is closed, management information stored in the TDMA is transferred into each DMA and recorded.

In an embodiment of the present invention, the plurality of TDMAs are used in a specific consecutive order of use. For example, TDMAs are used sequentially in the order of TDMA0 to TDMA2. In the TDMA, various optical disc defect management information and optical disc use state information are recorded at least one cluster, which is a minimum recording unit, every recording. Various types of information recorded in the TDMA are collectively referred to as temporary disc management structure (TDMS) information. Such TDMS information can be changed or added depending on the matter determined by the standard.

TDMS information includes Temporary Defect List (TDFL), Sequential Recording Range Information (SRRI), Space Bitmap (SBM), and Temporary Disc Definition Structure (TDFL). TDDS) information.

The TDFL records the optical disc defect management information, and the SRRI is applied to the sequential recording mode as information indicating the state of the optical disc usage. In addition, the SBM is applied to the random recording mode, and the Temporary Disc Definition Structure (TDDS) is provided in the last sector of the cluster, and includes the latest position information of the TDFL and SRRI (or SBM). At this time, SRRI and SBM cannot be used simultaneously, and are selectively recorded according to the recording mode.

For example, one or more TDFL / SBM / SRRIs are included with TDDS in one cluster at every write or update. That is, the recording of TDFL / SBM / SRRI together with the TDDS is configured in one cluster, and the TDDS can be recorded in the last sector of each cluster. However, it is also possible to record the TDDS information in the first sector of the cluster instead of the last sector.

In this regard, the TDDS includes general recording and reproducing information of the optical disc. As described above, the TDDS includes pointer information specifying the latest positions of the TDFL and SRRI (or SBM), so that the optical disc can be recorded and reproduced. When loaded into a device, it is always the information to check first. Since the information in the TDDS is continuously updated according to the use state of the optical disc, the information is always recorded every time or every update in the TDMA. Therefore, the last TDDS in the recently used TDMA is checked to access various management information on the current optical disc usage status.

As described above, the TDMA for recording the TDMS configured as described above is used in a specific order of use. For example, if the first TDMA is updated in the first used TDMA0 whenever necessary and the TDMA0 is completely recorded, According to the order of use, the next TDMA, for example TDMA1, is used to update the TDMS information. An embodiment of the present invention provides an indicator for indicating which of the TDMAs are currently used among the TDMAs used in a specific order of use. Hereinafter, this will be described in detail with reference to FIG. 2.

FIG. 2 is a schematic diagram illustrating TDMA0 of FIG. 1. Hereinafter, the configuration of the TDMA in which the indication information is recorded and the recording method of the management information will be described in detail with reference to FIG. 2.

As shown in FIG. 2, TDMA0 of an optical disc according to an embodiment of the present invention includes two indicator clusters 10, 12, which record two TDMAs (TDMA1, TDMA2) and indication information for managing DMA. 14). In this embodiment, the indication information may be referred to as a TDMA access indicator. In this case, each indication information area 10, 12, 14 may be formed in one cluster unit.

The indication information is information for indicating which TDMA is currently used among the plurality of TDMAs according to the TDMA order of use. Currently used TDMA means a TDMA that is currently being used, accessed or available among all TDMAs having a specific order of use.

According to various embodiments, a scheme for indicating a TDMA currently being used by the indication information may be implemented. For example, it is possible to indicate a TDMA currently being used or to indicate a used TDMA.

By indicating the TDMA currently being used by the indication information, it is possible to easily reproduce the last defect management and the optical disc usage state information recorded in the TDMA currently being used, thereby reducing the initial access time as a whole.

Such indication information can be provided in various areas in the recording layer. In particular, the recording and reproducing apparatus may be provided in a management area (Lead-In Area, Lead-Out Area, etc.) for reproducing in order to obtain various kinds of information of the optical disc before the actual recording and reproducing. In the present embodiment, such indication information is provided in TDMA (TDMA0) located in the lead-in area 100.

The management information recording method of the optical disc according to the present embodiment provides instruction information specifying the position of the TDMA currently being used. Specifically, the optical disc has three TDMAs (TDMA0, TDMA1, TDMA2) in a single layer having one recording layer, and TDMA is used in a specific order of use.

As described above, the indication information indicating whether one TDMA is used or not is stored in one recording unit, that is, for example, the indication information areas 10, 12, 14 of one cluster. The indication information is used as information indicating whether to use TDMA1 and TDMA2. The indication information directly indicates whether the corresponding TDMA1 and TDMA2 are currently TDMA. This is done by performing a specific recording in the instruction information area. If a specific recording is performed in the instruction information areas 10, 12, and 14, the instruction information areas 10, 12, and 14 become a recorded state, and the instruction information areas 10, 12, and 14 are recorded. If no specific recording is performed in the display, the instruction information areas 10, 12, and 14 are in a not recorded state.

If all the indication information areas 10, 12, 14 are unrecorded, this means that the first TDMA0 used is the TDMA currently in use. On the other hand, if the TDMA1 indication information area 14 is in the recording state, it means that TDMA1 is the TDMA currently in use. In addition, if the TDMA2 indication information area 12 is in the recording state, it means that TDMA2 is the TDMA currently in use.

That is, when the first used TDMA0 becomes full during user data recording, the relevant information is recorded in the TDMA1 designated in the next use order, and when the second used TDMA1 becomes full, the next The relevant information is recorded in the TDMA2 designated in the order of use.

In this case, predetermined specific data is recorded in the instruction information areas 10, 12, and 14 to make the instruction information areas 10, 12, and 14 recorded. The indication information areas 10, 12, and 14 that are in the recording state indicate that the corresponding TDMA is currently in use, which means that management information must be recorded in the TDMA while user data recording continues.

Therefore, by checking whether the indication information areas 10, 12, 14 are in the recorded state or the unrecorded state, the recording / reproducing apparatus can quickly and easily identify which TDMA of the data recording operations should be used in the optical disc. In other words, this drastically reduces the access time and also provides efficient recording operation in the optical disc.

On the other hand, when the optical disc includes two or more TDMAs, the number of indication information areas is determined according to the number of TDMAs present in the optical disc. For example, if n TDMAs exist in the optical disc, n indication information areas exist. That is, each indication information area corresponds to a specific TDMA and DMA among the TDMAs, and in general, the first TDMA used as the TDMA order of use has no corresponding indication information.

Meanwhile, various methods may be implemented to record specific data in the indication information areas 10, 12, and 14 in order to keep the indication information areas 10, 12, and 14 in a recording state. For example, it is also possible to record a high frequency signal in order to more easily check whether the indication information areas 10, 12, 14 are in a recording state. It is also possible to record, for example, meaningless dummy data or real meaningful data in the instruction information areas 10, 12, 14.

On the other hand, in the indication information areas 10, 12, and 14 indicating the use situation of each TDMA, TDDS information first recorded in each TDMA may be repeatedly recorded. In closing, final TDDS information is recorded in the DMA indication information area 10 indicating the DMA area usage situation.

However, when there are few defect areas and recording management information updates, and there is little use of TDMA, not all of the TDMA available in the optical disc is used. In this case, an empty area in which no data is recorded is generated among the TDMA indication information areas 10, 12, and 14 allocated to TDMA0.

For example, when only TDMA0 is used, only the DMA instruction information area 10 is recorded, and the TDMA1 instruction information area 14 and the TDMA2 instruction information area 12 are left empty.

Therefore, when the drive attempts to read the information recorded on the optical disc, the read TDMA0 can be confusing to find the next available TDMA due to the empty TDMA2 indication information area 12. Therefore, the empty TDMA2 indication information area 12 is recorded as predetermined data.

At this time, the final TDDS (DDS) information recorded in the DMA indication information area 10 can be repeatedly recorded when the TDMA2 indication information area 12 is closed. In addition, the information recorded in the indication information area most recently used in the empty TDMA2 indication information area 12 may be repeatedly recorded. For example, if up to the TDMA1 area is used, the contents recorded in the TDMA1 indication information area 14 are repeatedly recorded. In other words, this information is different from the content recorded in the DMA indication information area 10. Alternatively, the empty TDMA2 indication information area 12 may be filled with dummy data such as 00h.

3 is a schematic diagram of a recording layer provided in the optical disc according to the second embodiment of the present invention. As shown in Fig. 3, the optical disc according to the present embodiment is composed of a dual layer optical disc including a first recording layer L0 and a second recording layer L1.

Each recording layer L0, L1 includes a lead-in area 400, a data area 500, and a lead-out area 600 formed from the inner circumference of the optical disc.

The data area 500 includes inner spare areas ISA0 and ISA1 and outer spare areas OSA0 and OSA1 on an inner circumference and an outer circumference, respectively, and includes user data areas 510 and 520 formed therebetween.

Further, TDMAs (TDMA0, TDMA1, TDMA2, TDMA3, TDMA4, and TDMA5) are provided in the lead-in area 400, the inner spare areas ISA0 and ISA1 and the outer spare areas OSA0 and OSA1, respectively. The optical disc according to the present embodiment includes six TDMAs.

At this time, TDMA0 and TDMA1 provided in the inner spare regions ISA0 and ISA1 having a fixed size have a fixed size, and TDMA2, TDMA3, TDMA4, and TDMA5 have a variable size within ISA0, OSA0, OSA1, and ISA1. The size is variable according to the size of the spare area.

Although not shown, a plurality of disc management areas DMAs may be provided in the lead-in area 400 and the lead-out area 600. TDMA temporarily stores the defect management information and, and DMA permanently stores the defect management information and. For example, when an optical disc is closed, management information stored in TDMA is previously recorded in each DMA.

In an embodiment of the present invention, the plurality of TDMAs are used in a specific consecutive order of use. For example, TDMAs are used sequentially in the order of TDMA0 to TDMA5. Since the information recorded in the TDMA is the same as that described in the first embodiment described above, detailed description thereof is omitted here.

4 is a schematic diagram illustrating TDMA0 of FIG. 3. Hereinafter, with reference to FIG. 4, the configuration of the TDMA in which the instruction information is recorded and the method of recording management information will be described in detail.

As described above, the indication information is information indicating which TDMA is currently used among the plurality of TDMAs according to the TDMA order of use. In this embodiment, such indication information is provided in TDMA0 located in the lead-in area of the first recording layer L0.

As described above, the indication information indicating whether one TDMA is used or not is stored in one recording unit, that is, for example, one cluster indication information area.

The indication information is used as information indicating whether or not to use the TDMA1 to TDMA5. The indication information directly indicates whether the corresponding TDMA1 to TDMA5 are TDMA currently in use. This is done by performing a specific recording in the instruction information area.

If a specific recording is performed in the instruction information areas 20, 22, 24, 26, 28, and 30, the instruction information areas 20, 22, 24, 26, 28, and 30 have a recorded state. If no specific recording is performed in the instruction information areas 20, 22, 24, 26, 28, and 30, the instruction information areas 20, 22, 24, 26, 28, and 30 are not recorded. )

If all the indication information areas 20, 22, 24, 26, 28, and 30 are unrecorded, this means that the first TDMA0 used is the TDMA currently in use. On the other hand, if the TDMA1 indication information area 30 is in the recording state, it means that TDMA1 is the TDMA currently in use. In addition, if the TDMA2 indication information area 28 is in the recording state, it means that TDMA2 is the TDMA currently in use.

That is, when the first used TDMA0 becomes full during user data recording, the relevant information is recorded in the TDMA1 designated in the next use order, and when the second used TDMA1 becomes full, the next The relevant information is recorded in the TDMA2 designated in the order of use.

On the other hand, in the indication information areas 20, 22, 24, 26, 28, and 30 indicating the use situation of each TDMA, TDDS information first recorded in each TDMA may be repeatedly recorded. In closing, the final TDDS information is recorded in the DMA indication information area 20 indicating the DMA area usage situation.

However, as described above, when there are not many defect area and recording management information updates, and there is little use of TDMA, all of the TDMAs available in the optical disc are not used. In this case, an empty area is generated in the TDMA indication information areas 20, 22, 24, 26, 28, and 30 allocated to the TDMA0 area.

For example, when only the DMA indication information area 20 and the TDMA1 indication information area 30 are used, the TDMA2 to TDMA5 indication information areas 22, 24, 26, and 28 remain empty.

Therefore, when the drive attempts to read the information recorded on the optical disc, the read TDMA0 can be confusing to find the next available TDMA due to the empty TDMA2 to TDMA5 indication information areas 22, 24, 26 and 28. In particular, when the number of TDMAs is large as in this embodiment, this problem may become more serious. Therefore, the empty TDMA2 to TDMA5 indication information areas 22, 24, 26, and 28 are recorded as predetermined data.

At this time, the final TDDS (DDS) information recorded in the DMA indication information area 20 can be repeatedly recorded when the TDMA2 to TDMA5 indication information areas 22, 24, 26, and 28 are closed.

In addition, the information recorded in the indication information area most finally used in the empty TDMA2 to TDMA5 indication information areas 22, 24, 26, and 28 can be repeatedly recorded. For example, if the disk information update is small and used up to the TDMA1 area, the contents recorded in the TDMA1 indication information area 30 are repeatedly recorded. In other words, this information is different from the content recorded in the DMA indication information area 20. Alternatively, the empty TDMA2 to TDMA5 indication information areas 22, 24, 26, and 28 may be filled with dummy data.

5 is a schematic diagram showing a data recording apparatus according to an embodiment of the present invention. The configuration of the recording apparatus shown in FIG. 5 is merely for illustrating the present invention, and the present invention is not limited to the configuration of the recording apparatus described below. As shown, the recording apparatus according to the embodiment of the present invention includes a pickup 32, a servo 36, a signal processor 38, a memory 40 and a microcomputer 42.

The pickup 32 records data on the optical disc 700 and reproduces the recorded data.

The servo 36 controls the operation of the pickup 32, and the signal processor 38 recovers the reproduction signal received from the pickup 32 to a desired signal value, or records a signal to be recorded on the optical disc 700. It modulates and transmits the signal.

The memory 40 stores various necessary information necessary for recording / reproducing of the optical disc 700, and the microcomputer 42 operates the pickup 32, the signal processor 38, the servo 36, and the memory 40. To control.

The pickup 32, the servo 36, the signal processor 38, the memory 40, and the microcomputer 42 are also referred to as recording / reproducing units. In view of the reproduction, the recording / reproducing section reads data from the optical disc 700 or the storage 44 under the control of the control section 48 and provides it to the decoder. In other words, the recording / playback section serves as a playback section (or reader section) that reads data from the viewpoint of playback.

In terms of recording, the recording and playback section is a recording section that receives a signal encoded by the AV encoder 46 and records video, audio data, and the like on the optical disk 700.

In this regard, the storage 44 is a kind of storage means provided or connected to the recording apparatus, and means an element that a user can arbitrarily store and utilize necessary information and data. Data with persistence may be stored in storage 44. As the storage 44, a flash memory provided in the recording apparatus and a USB memory, a HDD memory or a memory card that can be connected to and removed from the recording apparatus can be used.

The storage 44 may also be used as a means for storing data associated with an optical disc (eg, BD or HD-DVD). The data stored in the storage in association with the optical disc is generally data downloaded from an external source, It is also possible for data to be read directly from the record carrier and stored in the storage 44.

In addition, the control unit 48 is responsible for controlling all the components in the recording apparatus, and controls the playback of the recording medium by the interface with the user, while controlling the download of data existing outside the recording medium by a user command, etc. Done.

At this time, the control unit 48 and the microcomputer 42 may be provided separately to operate. In addition, the functions of the control unit 48 and the microcomputer 42 may be integrated to operate as one control unit. The control unit 48 may be composed of a program (software) and / or hardware provided in the recording apparatus.

In addition, the control unit 48 records an indicator indicating which TDMA of the plurality of TDMAs is in use in a part of the first temporary disc management area (TDMA), and closes the disc. In closing, all components in the recording apparatus are controlled to record data in a region in which the indication information is not recorded among some regions of the first TDMA. This is the same as described in detail in the recording method of the optical disc management information according to the embodiment of the present invention.

In addition, the AV decoder 50 finally decodes the data provided from the recording medium and / or the storage 44 into output data and decodes the data to the user under the control of the controller. The AV decoder 50 may be configured of a plurality of decoders according to the type of data.

In addition, the AV encoder 46 may perform a function of recording a signal on the optical disc 700. For example, an MPEG-2 transport may be a signal of a specific format capable of recording an input signal on the optical disc 700 under the control of a controller. The signal is converted into a stream and provided to the signal processor 38.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings, and the present invention is also provided. Naturally, it belongs to the range of.

1 is a schematic diagram of a recording layer provided in an optical disc according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating TDMA of FIG. 1.

3 is a schematic diagram of a recording layer provided in the optical disc according to the second embodiment of the present invention.

4 is a schematic diagram illustrating TDMA of FIG. 3.

5 is a block diagram of a data recording apparatus according to an embodiment of the present invention.

Claims (21)

Recording an indicator indicating which of the plurality of TDMAs is in use in a partial area of the first temporary disc management area (TDMA); And Recording data in a region in which the indication information is not recorded among some regions of the first TDMA when the disk is closed; Management information recording method of an optical disc comprising a. According to claim 1, And the data is disc definition structure (DDS) information. According to claim 1, And said data is said indication information. The method of claim 3, wherein And the data is the management information recording method of the optical disc which is the most recently used indication information. According to claim 1, And the data is dummy data. According to claim 1, The optical disc includes one recording layer, And the recording layer includes three TDMAs. According to claim 1, The optical disc includes a first recording layer and a second recording layer, And the first recording layer and the second recording layer each comprise three TDMAs. According to claim 1, The optical disk has a lead-in area, And wherein the first TDMA is located in the lead-in area. Includes a plurality of TDMAs, The plurality of TDMAs, An indication indicating which of the plurality of TDMAs is in use comprises a first TDMA recorded in a partial region thereof, And the first TDMA includes data recorded in one of the partial regions in which the indication information is not recorded. The method of claim 9, And the data is disc definition structure information. The method of claim 9, And the data is the indication information. The method of claim 11, wherein The data is the indication information most recently used. The method of claim 9, And the data is dummy data. The method of claim 9, The optical disc includes one recording layer, And the recording layer includes three TDMAs. The method of claim 9, The optical disc includes a first recording layer and a second recording layer, And the first recording layer and the second recording layer each comprise three TDMAs. The method of claim 9, And a lead-in area in which the first TDMA is located. A recording section for recording data on the optical disk; And An indicator indicating which TDMA among a plurality of TDMAs is in use is recorded in a portion of the first temporary disc management area (TDMA), and the first time when the disc is closed. A control unit which controls the recording unit to record data in a region in which the indication information is not recorded among some regions of TDMA Data recording device comprising a. The method of claim 17, And the data is disc definition structure (DDS) information. The method of claim 17, And the data is the indication information. The method of claim 19, And said data is the last used indication information. The method of claim 17, And the data is dummy data.

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