KR100742327B1 - Method for optimizating WS according to adaptive WS calibration and apparatus thereof - Google Patents

Abstract

Provided are a WS optimization method through adaptive WS learning and an optical recording device using the same. The WS optimization method comprises: recording buffered user data on a rewritable optical disc, performing WS learning when the buffered user data recording is completed, and user data subsequently buffered according to WS acquired through WS learning. Recording the step. As a result, the WS optimization can be performed in real time through additional WS learning using the spare time generated during the UD recording, so that the UD is more optimally recorded.

WS, WS Learning TA, RIA, RIB, RI

Description

Method for optimizing WS through adaptive CSS learning and optical recording apparatus using the same {Method for optimizating WS according to adaptive WS calibration and apparatus}

1 illustrates the format of a rewritable optical disc that can be used in practicing the present invention;

2 is a block diagram of an optical recording apparatus for performing WS optimization through adaptive WS learning, according to an embodiment of the present invention;

3 is a flowchart provided to explain a WS optimization method through adaptive WS learning according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

UDA: User Data Area UD: User Data

TA: Test Area RIA: Recording Information Area

RIB: Recording Information Block 150: RIA Analysis Unit

160: RIA inspection unit 170: WS learning area determination unit

180: control unit

The present invention relates to a WS (Write Strategy) optimization method and an optical recording apparatus using the same, and more particularly, to a WS optimization method through adaptive WS learning and an optical recording apparatus using the same.

The optical recording apparatus performs WS learning prior to recording the user data in the user data area of the mounted optical disc. WS learning is a procedure performed to obtain an optimal WS. The reason for preceding WS learning prior to recording user data is to improve recording quality by recording user data according to a more optimal WS.

As such, WS learning is performed when the optical disc is mounted (inserted) in the optical recording apparatus, and is not subsequently performed during user data recording. This means that the WS obtained when mounting the optical disc does not change later.

However, it is not guaranteed that the WS obtained at the time of mounting the optical disc is an optimal WS for recording user data. This is due to the fact that WS learning has not been performed properly or the characteristics of the medium have changed due to multiple rewrites of the user data area of the optical disc.

Thus, in such a case, there is a need to modify the WS.

On the other hand, WS learning is performed in the test recording area of the optical disc. The test record area is an area on the optical disc that is separately prepared for WS learning, and the test record is not performed again at the point where the test record has already been performed. In other words, the point on the test record area where WS learning is made corresponds to the point where the test record has never been made.

On the other hand, there are optical discs in which user data can be rewritten over a number of times in the user data area, which is called a rewritable optical disc. In the case of such a rewritable optical disc, the WS learning is performed in the test recording area, and the WS learning is performed at a point on the test recording area that has never been recorded.

However, it is problematic that WS learning to optimize the WS used to record user data in a user data area that has already been rewritten over a number of times is performed at a point on the test record area that has never been recorded so far. have.

This is because the media characteristics of the user data area that has been rewritten over several times and the point on the test recording area that has never been recorded so far are different. This is because the media properties of the user data area change due to the rewriting over several times. Due to

Therefore, the WS acquired through the WS learning in the test recording area is not suitable for use in recording user data in the user data area in which rewriting has been performed for several times. Such incompatibility becomes more serious as the number of times of rewriting of user data in the user data area increases.

The present invention has been made to solve the above problems, and an object of the present invention is to perform additional WS learning using leisure time generated during user data recording in order to allow user data to be recorded more optimally. Through WS optimization method and optical recording device applying the same.

According to the present invention for achieving the above object, WS optimization method comprising the steps of: a) recording the buffered user data on a rewritable optical disc; b) performing WS (Write Strategy) learning when the buffered user data recording is completed; And c) recording user data subsequently buffered according to the WS acquired through the WS learning.

In addition, the step b) is preferably completed until the predetermined amount of user data to be recorded in the step c) is buffered.

In addition, the WS optimization method further comprises the step of checking whether or not the normal recording of the record information that is information on the user data recorded in the step a), wherein the step b), the record information is abnormally recorded If it is determined that it is, it can be performed.

In the step b), any one of a recording information area and a test recording area in which recording information, which is information on the user data recorded in the recording step, is recorded, is a WS learning area which is an area where the WS learning is to be performed. Determining as; And performing the WS learning in the determined WS learning area.

In the determining step, it is preferable to determine, as the WS learning area, an area consisting of blocks which are not used in recording the user data among the blocks constituting the recording information area.

In the determining step, it is preferable to determine, as the WS learning area, an area consisting of blocks in which the recording information has already been recorded for a predetermined number of blocks constituting the recording information area.

In the determining step, if the number of blocks that are not to be used in recording the user data is greater than or equal to a predetermined number, among the blocks constituting the recording information area, the WS learning area is defined as the area consisting of the blocks that are not to be used. Can be determined.

In the determining step, when the number of unused blocks is less than the predetermined number, the test recording area may be determined as the WS learning area.

On the other hand, an optical recording apparatus according to the present invention comprises: an optical pickup for recording buffered user data on a rewritable optical disc; An optical pickup driver for driving the optical pickup; And when the buffered user data recording is completed, controlling the optical pickup driving operation of the optical pickup driver to perform WS (Write Strategy) learning, and subsequently buffering the user data according to the WS acquired through the WS learning. And a control unit to control the recording.

The WS learning is preferably completed until a certain amount of user data to be recorded thereafter is buffered.

The optical recording apparatus may further include an inspection unit that checks whether or not the recording information, which is information on the recorded user data, is normally recorded, wherein the controller determines that the record information is abnormally recorded by the inspection unit. If so, the optical pickup driving operation of the optical pickup driver may be controlled to perform the WS learning.

The optical recording apparatus determines that any one of a recording information area and a test recording area, which are areas in which recording information, which is information on recorded user data, is recorded, is determined as a WS learning area, which is an area in which the WS learning is to be performed. The optical pickup driving unit may further include an optical pickup driving unit such that the WS learning is performed in the WS learning region determined by the determination unit.

The determining unit may determine, as the WS learning area, an area composed of blocks which are not used in recording the user data among the blocks constituting the recording information area.

The determining unit may determine, as the WS learning area, an area including blocks in which the recording information has already been recorded for a predetermined number of blocks constituting the recording information area.

In addition, the determination unit, if the number of blocks that are not to be used in recording the user data among the blocks constituting the recording information area more than a predetermined number, the area consisting of the blocks that are not to be used as the WS learning area You can decide.

The determining unit may determine the test recording area as the WS learning area when the number of unused blocks is less than the predetermined number.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

1 shows a format of a rewritable optical disc that can be used in practicing the present invention. Referring to FIG. 1, a rewritable optical disc (hereinafter, referred to as an optical disc) is formed from an inner to an outer, an inner drive area (IDA) and a lead in area (LIA). , A user data area (UDA), a lead out area (LOA), and an outer drive area (ODA) are provided.

The UDA is an area in which 'User Data' (hereinafter, abbreviated as 'UD') such as AV data is recorded.

In IDA, LIA, LOA, and ODA, data related to management, reproduction, and recording of the optical disc are recorded. In particular, IDA is provided with a test area (TA) and a recording information area (RIA). TA is a test record area used for WS (Write Strategy) learning, and RIA is an area where recording information (hereinafter, abbreviated as 'RI'), which is information about UD recorded in UDA, is recorded.

The RIA is composed of a plurality of recording information blocks (RIBs) (first to Nth RIBs). The record of RI is performed in parallel with the record of UD. Specifically, when a certain amount of UD is recorded in the UDA, information about the UD recorded until then is initially recorded in the RIB as an RI. Thereafter, if a certain amount of UD is further recorded in the UDA, the information about the UD recorded until then is rewritten to the RIB as a new RI. That is, the RI is continuously updated in the process of recording the UD.

On the other hand, since RI is information about the recorded UD, it plays an important role in reproducing the UD. Therefore, when the 'RI initial recording or rewriting' (hereinafter abbreviated as 'RI recording') is abnormally performed, the UD cannot be reproduced even if the UD is normally recorded.

Therefore, when the RI recording is completed, it is determined whether the RI recording is normally performed. If it is determined that the RI recording is normally performed, RI rewriting is continuously performed in the RIB in which the RI recording is performed. However, if it is determined that the RI recording has been abnormally performed, the RIB on which the RI recording has been performed is no longer used, and the RI recording is performed to the RIB located next. That is, if RI recording is performed on the first RIB, and the RI recording is abnormally performed, RI recording is performed on the second RIB.

Accordingly, RIBs located before the RIB in which the RI recording is currently being performed are UDBs that have been previously recorded several times and are expected to be unused in recording the UD in the future. For example, if RI recording is currently being performed on the sixth RIB, the first to fifth RIBs have already been performed several times and RIBs are expected to be unused in recording the UD in the future.

On the other hand, RIBs located in the previous RIB where RI recording is being performed are similar to UDAs in which the media characteristics have changed due to the UD rewriting several times. It can be inferred.

So far, the format of the optical disc that can be used in practicing the present invention has been described. The optical discs that can be used in practicing the present invention include rewritable compact discs (CDs), digital video discs (DVDs), blue-ray discs (BDs), HD-DVDs, and the like, as well as other types of rewritable optical discs. Of course, it can be used in practicing the present invention.

Meanwhile, although the terminology for the area constituting the optical disk may vary according to the type of optical disk, the terms shown in FIG. 1 will be used below. For example, the term RIA shown in FIG. 1 is a term used for a DVD-RW. The RIA corresponds to a table of contents zone (TCZ) for DVD + RW, and DIZ (for DVD-RAM). Disk Identification Zone), hereinafter, the term 'RIA' shown in FIG. 1 is used as a generic term for RIA, TCZ, and DIZ. Similarly, the term TA shown in FIG. 1 corresponds to PCA (Power Calibration Area) for DVD-RW and inner disk test zone (IDTZ) for DVD + RW. Hereinafter, PCA and IDTZ are referred to below. As a generic term, it is meant to use the term 'TA' shown in FIG. 1.

2 is a block diagram of an optical recording apparatus according to an embodiment of the present invention. This optical recorder optimizes WS through adaptive WS learning. Here, 'adaptive WS learning performance' refers to optimizing WS by additionally performing WS learning by using spare time generated during UD recording.

As shown in FIG. 2, the optical recording apparatus includes a PU (Pick Up) 110, a PU driving unit 120, a recording processing unit 130, a reproduction processing unit 140, a RIA analysis unit 150, and an RIA inspection unit. 160, a WS learning area determiner 170, a controller 180, and a memory 190.

The PU 110 is driven by the PU driver 120, reads data recorded on the mounted optical disc D, and outputs an electric signal corresponding to the read data to the reproduction processor 140. The playback processor 140 performs signal processing on the electrical signal output from the PU 110. In addition, the PU 110 records the UD buffered in the UD buffer 135 on the mounted optical disc D after being processed by the recording processor 130.

The RIA analyzer 150 analyzes the RIA through the output signal of the reproduction processor 140 and outputs an RIA analysis result.

The RIA inspection unit 160 checks whether the RI is normally recorded using the RIA analysis result output from the RIA analysis unit 150, and transfers the test result to the WS learning area determiner 170 and the controller 180, which will be described later. do.

The WS learning area determiner 170 determines the RIA or the TA as the WS learning area by using the RIA analysis result output from the RIA analyzer 150. Here, the 'WS learning area' means an area in which the above-described adaptive WS learning is to be performed.

The controller 180 determines whether to perform adaptive WS learning based on the check result of the RIA check unit 160. If it is determined that the adaptive WS learning is to be performed, the controller 180 performs the PU 110 driving operation of the PU driver 120 to perform the WS learning in the WS learning area determined by the WS learning area determiner 170. Control and stores the WS obtained by WS learning in the memory 190. The controller 180 controls the PU 110 driving operation of the PU driver 120 to record the UD according to the WS stored in the memory 190.

Hereinafter, a process in which the optical recording apparatus shown in FIG. 2 performs WS optimization through adaptive WS learning will be described in detail with reference to FIG. 3. 3 is a flowchart provided to explain a WS optimization method through adaptive WS learning according to an embodiment of the present invention.

Referring to FIG. 3, first, the controller 180 stores a WS acquired through WS learning performed in a TA of an optical disc D (S210). Specifically, in step S210, the controller 180 controls i) the PU driver 120 so that the PU 110 performs WS learning in the TA of the optical disc D, and ii) obtained through WS learning. The WS is stored in the memory 190.

Thereafter, the controller 180 determines whether a predetermined amount of UD is buffered in the UD buffer 135 provided in the recording processor 130 (S220).

If it is determined in step S220 that a certain amount of UD is buffered, the controller 180 allows the UD to be recorded according to the stored WS (S230). In detail, operation S220 may be performed by the controller 180 controlling a driving operation of the PU 110 of the PU driver 120 so that the UD is recorded according to the WS stored in the memory 190.

When the buffered UD recording is completed, the controller 180 controls the RI to be recorded (S240). In detail, operation S240 may be performed by the controller 180 controlling a driving operation of the PU 110 of the PU driver 120 so that the RI, which is information about the recorded UD, is recorded in the corresponding RIB.

Then, the RIA inspection unit 160 checks whether the RI is normally recorded using the RIA analysis result output from the RIA analyzer 150 (S250). The inspection result in operation S250 is transmitted to the WS learning area determiner 170 and the controller 180.

If it is determined in step S250 that the RI is abnormally recorded (S260), the WS learning area determiner 170 determines the number of unused RIBs using the RIA analysis result (S270). Here, the 'unused RIB' means a RIB that has been already recorded several times among the RIBs constituting the RIA, and is expected to be unused in recording the UD in the future. On the other hand, the RIBs that are not to be used have already been recorded several times in the RI recording, the above-mentioned UDA is similar to the characteristics of the medium has already been changed due to the rewrite several times.

Specifically, in step S270, the determination of the number of unused RIBs of the WS learning area determiner 170, the 'information on the RIB to be performed RI' is output from the RIA analysis unit 150 as a result of the RIA analysis. It is possible by using. For example, if the RIB on which the RI recording is to be performed is the sixth RIB, the first to fifth RIBs have already been performed several times and the RIBs that are expected to be unused in the future UD recording. Correspondingly, the WS learning region determiner 170 determines the number of unused RIBs as '5'.

If it is determined in step S270 that the number of unused RIBs is greater than or equal to '5' (S280), the WS learning area determiner 170 determines the WS learning area as an area consisting of unused RIBs (S290). For example, if five unused RIBs are used as the first to fifth RIBs, an area composed of the first to fifth RIBs is determined as the WS learning area.

Then, the controller 180 stores the WS acquired through the WS learning performed in the WS learning area determined in step S290, so that the previously stored WS is updated (S310). A detailed description of the step S310, since it can be inferred as a detailed description of the step S210, it will be omitted.

If the number of unused RIBs is five or more, this indicates that the UDA of the optical disc D has a relatively high number of UD rewrites. This is due to the greater number of UD rewrites in the UDA, the larger number of RIBs to be unused. Therefore, in the above case, the media characteristics of the UDA correspond to the media characteristics of the RIBs to be used rather than the media characteristics of the TA.

Therefore, rather than the TA, the WS obtained through the WS learning performed on the unused RIBs is more appropriate to record the UD in the UDA.

Meanwhile, if it is determined in step S270 that the number of unused RIBs is less than '5' (S280), the WS learning area determiner 170 determines the TA as the WS learning area (S300). Then, the controller 180 stores the WS acquired through the WS learning performed in the TA determined as the WS learning area, so that the previously stored WS is updated (S310). The reason for performing WS learning in TA is that the area consisting of less than 5 'unused RIBs' is not enough to perform WS learning.

In addition, when the number of unused RIBs is less than five, it indicates that the number of UD rewrites in the UDA of the optical disc D is relatively small. Therefore, the above case is because the media characteristic of the UDA is similar to the media characteristic of the TA rather than the media characteristic of the unused RIBs.

Accordingly, the WS obtained through the WS learning performed in the TA is obtained and stored in the UDA because the WS obtained through the WS learning performed in the TA is more suitable for recording the UD in the UDA.

After step S310, it is performed again from step S220. That is, the UD buffered in the UD buffer 135 after the UD recording in step S230 is recorded according to the WS acquired and stored in step S310.

On the other hand, steps S240 to S310 must be completed until the predetermined amount of UD to be recorded next to the UD recorded in step S230 is completed buffering. That is, steps S240 to S310 must be performed until the storage space of the UD buffer 135 is completely filled due to the UD buffered after the UD recorded in step S230.

In view of the current trend of increasing the recording speed of the optical recording apparatus, this is sufficiently possible. That is, since the draw amount for recording of the UD introduced into the UD buffer 135 is much larger than the inflow amount of the UD at a specific point in time, the optical recording device may buffer a predetermined amount of UD to be recorded next. Until you have a spare time, it will be able to perform the steps S240 to S310 by using the spare time.

In addition, the time required to move the position on the optical disk (D) of the PU 110 in the step S310 is very small. This is because the PU 110 is already located in the " RIA " of the optical disc D during the steps S240 and S250. That is, since "RIA", which is a position on the optical disk D where step S310 is performed, or "TA" adjacent to the RIA, is the same as or very close to "RIA" which is a position on the optical disk D where steps S240 and S250 are performed, The time required for the position movement on the optical disk D of the PU 110 becomes very small.

Up to now, the process of optimizing WS by additionally performing WS learning using leisure time generated during UD recording through adaptive WS learning has been described in detail with reference to a preferred embodiment.

In this embodiment, it is determined whether to perform WS learning additionally according to whether or not RI is normally recorded. That is, the WS learning is additionally performed to determine that the RI is abnormally recorded, but the WS learning is additionally performed to determine that the RI is normally recorded. This is because the RI abnormality record may be due to the WS nonconformity.

However, in implementing the present invention, the present invention is not necessarily required. Therefore, the present invention may be implemented by determining whether to perform WS learning additionally according to the number of UD records, the total amount of UD records, and whether the set time has elapsed. Of course.

In addition, in this embodiment, it is assumed that the number of RIBs to be unused is 'five' as a criterion for determining the WS learning area. That is, it is assumed that if the number of unused RIBs is '5' or more, the unused RIBs are determined as the WS learning area, whereas if the number of unused RIBs is less than '5', the TA is determined as the WS learning area. However, 'five' which serves as a criterion corresponds to a number arbitrarily set for convenience of description and may be implemented in a different number.

As described above, according to the present invention, WS optimization can be performed in real time through additional WS learning using spare time generated during UD recording. In this way, additional WS learning performed in real time may correct the WS acquired at the time of mounting the optical disc or the WS updated thereafter, even if inappropriate, so that the UD is more optimally recorded.

In addition, according to the present invention, WS optimization can be performed through WS learning in RIA, which is a region where the media characteristics are similar to the UDAs in which the media characteristics have changed due to rewriting several times, thereby further improving the recording quality of the optical disc.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (16)

a) recording the buffered user data on a rewritable optical disc; b) performing WS (Write Strategy) learning when the buffered user data recording is completed; And c) recording user data subsequently buffered according to the WS acquired through the WS learning; B), WS optimization method characterized in that the execution is completed until the predetermined amount of user data to be recorded in step c) is completed buffering. delete The method of claim 1, And checking whether the record information, which is information on the user data recorded in the step a), is properly recorded. B), And if it is determined that the record information is recorded abnormally. a) recording the buffered user data on a rewritable optical disc; b) performing WS (Write Strategy) learning when the buffered user data recording is completed; And c) recording user data subsequently buffered according to the WS acquired through the WS learning; B), Determining any one of a recording information area and a test recording area, which are areas in which record information, which is information on the user data recorded in the recording step, is recorded, as a WS learning area, which is an area where the WS learning is to be performed; And And performing the WS learning in the determined WS learning area. The method of claim 4, wherein The determining step, And among the blocks constituting the recording information area, an area consisting of blocks not to be used in recording the user data is determined as the WS learning area. The method of claim 5, The determining step, And among the blocks constituting the recording information area, an area consisting of blocks for which the recording information has already been recorded for a predetermined number of times is determined as the WS learning area. The method of claim 6, The determining step, Among the blocks constituting the recording information area, when the number of unused blocks in the recording of the user data is more than a predetermined number, the area consisting of the unused blocks is determined as the WS learning area. WS optimization method. The method of claim 7, wherein The determining step, And determining the test recording area as the WS learning area when the number of blocks to be unused is less than the predetermined number. An optical pickup for recording the buffered user data on a rewritable optical disc; An optical pickup driver for driving the optical pickup; And When the recording of the buffered user data is completed, the optical pickup driving unit controls the optical pickup driving unit so that WS (Write Strategy) learning is performed, and subsequently buffered user data according to the WS acquired through the WS learning. A control unit for controlling to be recorded; The WS learning, And a predetermined amount of user data to be recorded thereafter is completed before buffering is completed. delete The method of claim 9, And an inspection unit for checking whether or not the recording information, which is information on the recorded user data, is normally recorded. The control unit, And when the record information determines that the recording information is abnormally recorded, controlling the optical pickup driving operation of the optical pickup driving unit to perform the WS learning. An optical pickup for recording the buffered user data on a rewritable optical disc; An optical pickup driver for driving the optical pickup; And When the recording of the buffered user data is completed, the optical pickup driving unit controls the optical pickup driving unit so that WS (Write Strategy) learning is performed, and subsequently buffered user data according to the WS acquired through the WS learning. A control unit for controlling to be recorded; And a determining unit configured to determine one of a recording information area and a test recording area, which are areas in which record information, which is information about recorded user data, is recorded, as a WS learning area, which is an area where the WS learning is to be performed. The control unit, And the optical pickup driving operation of the optical pickup driving unit to perform the WS learning in the WS learning region determined by the determining unit. The method of claim 12, The determination unit, And among the blocks constituting the recording information area, an area composed of blocks not to be used in recording the user data is determined as the WS learning area. The method of claim 13, The determination unit, And among the blocks constituting the recording information area, an area composed of blocks for which the recording information has already been recorded for a predetermined number of times is determined as the WS learning area. The method of claim 14, The determination unit, Among the blocks constituting the recording information area, when the number of unused blocks in the recording of the user data is more than a predetermined number, the area consisting of the unused blocks is determined as the WS learning area. Optical recording device. The method of claim 15, The determination unit, And when the number of unused blocks is less than the predetermined number, determining the test recording area as the WS learning area.

Images