JP2010165402A - Optical disk for reproduction performance evaluation, and method for evaluation of optical disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quantitatively evaluate reproduction performance of an optical disk drive. <P>SOLUTION: Alternative recording is allowed in a spare area during data recording by forming a defect 12 in a data area of an optical disk 10 for evaluation. The defect is formed in units of clusters, and formed by mixing at least, any two patterns among a first pattern formed by turns for each cluster, a second pattern formed of continuous clusters, and a third pattern formed of a specific part of an optical disk for each track or for each several tracks. Reproduction performance accompanied by seek operation of a defective area is evaluated by reproducing this optical disk for evaluation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disc for evaluating an optical disc apparatus and an evaluation method, and more particularly to an evaluation optical disc for evaluating the reproduction performance (playability) of the optical disc apparatus.

  A high-density optical disc that can record high-quality audio data and high-quality video data over a long period of time, such as a recordable Blu-ray disc (BD-R / RE: registered trademark), and an optical disc apparatus that records or reproduces data on this optical disc ( Optical disc recorder / player) has been put into practical use. The BD-R / RE has a lead-in area, a data area, and a lead-out area. An internal spare area ISA and an external spare area OSA are allocated to the beginning and end of the data area, respectively. The data recording unit of the BD-R / RE is a cluster, and it is detected whether or not there is a defect in the data area during data recording. If a defect is detected, an alternative recording operation is performed. For example, data scheduled to be recorded in the data area is recorded in a spare area (internal spare area or external spare area). Thereafter, the detected position information of the defective area and the replacement information replaced and recorded in the spare area are stored as management information in the defect list DFL of the disk management area DMA positioned in the lead-in area. At the time of data reproduction, instead of the defect area data, the defect list DFL is accessed to reproduce the data recorded in the spare area.

  FIG. 14 shows the data format of the BD-R / RE. An internal spare area ISA0 is provided in an area of, for example, 24.00 mm to 24.62 mm on the inner peripheral side, and a blank area is provided in an area of, for example, 55.23 mm to 57.48 mm on the outer peripheral side, and 57.48 mm to 58.00 mm. Is provided with an external spare area OSA0. The data area is an area of 24.62 mm to 55.23 mm.

  FIG. 15 shows a state of alternative recording for the spare area when there is a defect. Data is recorded from chapter 1 to chapter 16 in the data area, and when a defect is detected in chapter 1 to chapter 8 recorded from the inner circumference to the middle circumference, it is recorded in the internal spare area ISA0 as a substitute, and the middle circumference is recorded. When a defect is detected in chapter 9 to chapter 16 recorded on the outer periphery, the defect is recorded in the external spare area OSA0. That is, when a defect is detected while data is being recorded in the chapter 1, the controller of the optical disk apparatus seeks the optical pickup to the internal spare area ISA0 and substitute records the data, and then seeks the optical pickup to the original position again. Continue recording data. If a defect is detected while data is being recorded in the chapter 8, the controller of the optical disk apparatus seeks the optical pickup to the internal spare area ISA0 and substitute records the data, and then seeks the optical pickup to the original position again. Continue recording data. If a defect is detected while data is being recorded in the chapter 9, the controller of the optical disk apparatus seeks the optical pickup to the external spare area and records the data by replacement, and then seeks the optical pickup to the original position again to obtain the data. Continue recording.

  When a defect is detected, it is arbitrary whether the replacement recording is performed in the internal spare area ISA or the external spare area OSA. However, a defect within a disk radius of about 40 mm is recorded in the internal spare area ISA, and thereafter As for the defect, the seek distance can be shortened by recording in the external spare area OSA instead.

JP 2008-10122 A JP 2007-179740 A JP 2008-310871 A

  As described above, when reproducing a substitute recorded optical disc, the information in the defect list DFL in the disc management area DMA previously positioned in the lead-in area is read, and instead of the data in the defective area existing in the data area Data recorded in the spare area is reproduced. However, since the optical pickup performs a seek operation that reciprocates between the data area and the spare area, it imposes a heavy burden on the reproduction function. For example, if there are two defects in a chapter, data can be reproduced without any problem. However, as the number of defects increases to 4, 8, and 16, the number of seeks increases accordingly. Therefore, there are cases where frame dropping or video skipping appears remarkably during data playback. Of course, how many defects cause defects such as dropped frames and image skipping depends greatly on the playback performance of the optical disk device, but in other words, exactly how many defects the optical disk device can withstand. It is extremely important to evaluate.

  In Patent Document 3 above, first areas in which video data are recorded discontinuously in the data area and second areas treated as defective areas are alternately provided, and an alternative area is provided on the outer periphery side of the disc. It has been disclosed that the reproduction performance is evaluated by reading the video data while the optical pickup is alternately moving between the first area and the alternative area. Thus, the reproduction performance can only be evaluated, so to speak only the binary evaluation that the reproduction performance is good or bad, and the reproduction performance cannot be quantitatively evaluated with higher accuracy.

  The present invention provides an evaluation optical disc and an evaluation method capable of quantitatively evaluating the reproduction performance (playability) of an optical disc apparatus for alternative recording.

  An optical disk for reproducing performance evaluation of an optical disk apparatus according to the present invention has a data area and a spare area in which data is alternatively recorded when the data area has a defect, and the defect is formed in the data area in units of clusters. In addition, the defect is formed in a first pattern alternately formed for each cluster, a second pattern formed in a continuous cluster, and a first pattern formed in a specific portion of the optical disk every one track or every several tracks. Of the three patterns, at least any two patterns are mixed.

  In one embodiment of the present invention, the defect is formed by mixing all of the first pattern, the second pattern, and the third pattern.

  In another embodiment of the present invention, the data is recorded as a plurality of chapters in the data area, and in each of the first pattern, the second pattern, and the third pattern, the number of each chapter is several. Or the said defect is formed so that a position may differ.

  The present invention is also an evaluation method for evaluating the reproduction performance of an optical disc apparatus by reproducing an evaluation optical disc, wherein the evaluation optical disc has a data area and data when a defect exists in the data area. A spare area that is recorded as a substitute, and a defect is formed in cluster units in the data area, and the defect is formed in a first pattern alternately formed for each cluster and in a continuous cluster. Two patterns and at least any two patterns of a third pattern formed for every one track or every several tracks in a specific part of the optical disc, and reproducing the evaluation optical disc, The data area and the previous area due to a defect in at least any two of the first pattern, the second pattern, and the third pattern And evaluating the reproduction performance of the optical disc device by evaluating the reproduced data quality due to the seek operation of the optical pickup between the spare area.

  According to the present invention, it is possible to quantitatively evaluate the reproduction performance of the optical disc apparatus by forming a plurality of defect patterns in a mixed manner.

It is explanatory drawing of the defect pattern of the optical disk for evaluation. FIG. 2 is an explanatory diagram of alternative recording in the defect pattern of FIG. 1. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is explanatory drawing when a defect exists in the boundary of a some cluster. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is explanatory drawing in case a light dirt and a thin crack exist. It is explanatory drawing in case a fingerprint and the defect of a wide width exist. It is a table | surface figure which shows the list of the defect patterns contained in the optical disk for evaluation. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is explanatory drawing of the other defect pattern of the optical disk for evaluation. It is a processing flowchart of an embodiment. It is a data format figure of an optical disk. It is explanatory drawing of the alternative recording according to the defect of a chapter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, it is assumed that the internal spare area ISA0 is arranged on the inner circumference side and the external spare area OSA0 is arranged on the outer circumference side as shown in FIG. Further, as shown in FIG. 15, the data of chapters 1 to 16 is recorded in the data area, and when a defect is detected in chapters 1 to 8, the data is substituted and recorded in the internal spare area ISA0. Suppose that the optical disk apparatus records the data in the external spare area OSA0 instead when a defect is detected in the chapter 16. The optical disc apparatus is a recorder / player that reproduces data recorded on a BD-R / RE.

  FIG. 1 shows a defect pattern of the evaluation optical disk 10 in the present embodiment. As described above, data is recorded in cluster units in the BD-R / RE, but this evaluation optical disk 10 is an optical disk in which a defect 12 is formed for each cluster. That is, in adjacent clusters i, i + 1, i + 2, i + 3, i + 4,..., Defect 12 is formed in cluster i, defect 12 is not formed in cluster i + 1, and defect 12 is formed in cluster i + 2. The defect 12 is not formed in the cluster i + 3, and the defect 12 is formed in the cluster i + 4.

  Such a defect 12 can be formed using a laser beam, for example. That is, pits are formed by irradiating a cluster on which a defect is to be formed with laser light. Then, when data is recorded in the cluster at the time of data recording, data is further recorded in the already formed pits, and an excessive pit is formed, resulting in a defect. Such a pattern in which a defect is formed for each cluster is a severe pattern for the reproduction performance of the optical disc apparatus. This is because it is necessary to repeatedly execute the seek operation of the optical pickup many times in a short time. Hereinafter, the defect pattern in which the defect 12 is formed for each cluster as shown in FIG.

  FIG. 2 shows the state of alternative recording when the defect pattern I exists. When data of a chapter in a data area is recorded, since a defect exists in one cluster (referred to as cluster 6), for example, 5 seconds after the beginning of the chapter, it is recorded as a substitute in the internal spare area ISA0. In ISA0, data to be recorded in the cluster 6 is recorded as a substitute as shown. Since there is no defect in the next cluster 7 adjacent to the cluster 6, data is recorded in the cluster 7 as it is. Since there is a defect in the next cluster 8 adjacent to the cluster 7, it is recorded as a substitute in the internal spare area ISA0. In the internal spare area ISA0, data to be recorded in the cluster 8 is alternatively recorded as shown. Since there is no defect in the next cluster 9 adjacent to the cluster 8, data is recorded in the cluster 9 as it is. Thereafter, similarly, clusters 6, 8, 10, 12, 14, and 16 are recorded as substitutes in the internal spare area ISA0, and clusters 7, 9, 11, 13, 15, and 17 are recorded as they are. .

  When the substitute optical disk for evaluation recorded in this way is mounted on the optical disk apparatus to be inspected and data is reproduced, the optical pickup of the optical disk apparatus to be inspected is from cluster 1 to cluster 5 (that is, 5 seconds from the beginning of the chapter). Can reproduce data at that position, but for cluster 6, seek the optical pickup to the internal spare area ISA0 and reproduce the data, and then seek the optical pickup again to the position of cluster 7 to obtain the data. Play. The cluster 8 seeks the optical pickup again to the internal spare area ISA0 and reproduces the data, and then seeks the optical pickup again to the position of the cluster 9 to reproduce the data. Since there is a defect 12 for each cluster, a seek operation to the internal spare area ISA0 occurs for each cluster, which affects the reproduction performance. By evaluating whether or not the chapter data can be reproduced without dropping frames, or whether or not the chapter data can be reproduced without causing skipping, it is possible to evaluate the reproduction performance of the optical disc apparatus.

  Further, since the influence on the reproduction performance increases as the number of defects 12 increases, the reproduction performance of the optical disc apparatus can be quantitatively evaluated by increasing / decreasing the number of defects 12. For example, the defect 12 is formed for each cluster, but only one defect 12 per chapter, 4 defects 12 per chapter, 8 defects 12 per chapter, and 16 defects 12 per chapter. By forming four types on the evaluation optical disk 10 and evaluating the number of defects 12 and the quality of reproduction data, the reproduction performance can be quantitatively evaluated. Assume that the playback performance is evaluated in four stages of 1 to 4 ("4" is the best playback performance), and when the number of defects 12 is 16, the playback performance is "4", 8 When the number of frames is dropped, the playback performance is “3”. When the number of defects 12 is 4, the playback performance is “2”. When the number of defects 12 is 1, the playback performance is “2”. For example, the performance is set to “1”.

  FIG. 3 shows another defect pattern of the evaluation optical disk 10 in the present embodiment. In the defect pattern I, the defects 12 are alternately formed for each cluster. In this defect pattern, the defects 12 are continuously formed over a plurality of clusters. In FIG. 3, the defect 12 is continuously formed over two tracks. There are two clusters per circumference on the inner circumference of the optical disk and five per circumference on the outer circumference (one cluster length = 71.39 mm), and the number of clusters increases linearly with an increase in the disk diameter. In FIG. 3, assuming that there are three clusters in one track at a certain disk diameter, defects 12 are continuously formed in all the three clusters. When the defect 12 is formed over two tracks, the defect 12 is formed in a total of six clusters. In this way, a pattern in which the defect 12 is formed in a plurality of continuous clusters (a pattern in which the defect 12 is formed in all tracks) is referred to as a defect pattern II.

  FIG. 4 shows the physical significance of the defect pattern II. Assume that cluster 1 and cluster 2 exist on a track on the inner circumference side, and cluster 3 and cluster 4 exist on the next track. If there is some defect 13 on the optical disc, and this defect 13 is present at the boundary between cluster 1 and cluster 2 and the boundary between cluster 3 and cluster 4, data recording is performed in units of clusters. , Cluster 2, cluster 3, and cluster 4, a total of four clusters, are recorded in the internal spare area ISA0 (or the external spare area OSA0) instead. This is equivalent to the case where the defect 13 exists in all two tracks, and corresponds to the case of the defect pattern II. That is, it can be said that the defect pattern II is for evaluating the reproduction performance of the optical disc apparatus when the defect 13 as shown in FIG. 4 exists.

  Also in the defect pattern II, the reproduction performance can be quantitatively evaluated by increasing or decreasing the number of the defects 12. For example, when defects 12 are formed in a total of three clusters for one track, defects 12 are formed in a total of six clusters for two tracks, and defects 12 are formed in a total of nine clusters for three tracks. In this case, the reproduction performance can be quantitatively evaluated by forming the three types of optical discs on the evaluation optical disk 10 and evaluating the number of defects 12 and the quality of the reproduction data.

  5 and 6 show other defect patterns of the evaluation optical disk 10 in the present embodiment. In FIG. 5, a defect 12 is formed in a cluster located in a specific part or direction over a plurality of tracks. Defects 12 are formed in clusters discretely, not continuously. On the other hand, FIG. 6 is similar to FIG. 5 in that the defects 12 are discretely formed in the cluster, but in FIG. 5, the defect 12 is formed for each track, whereas in FIG. A defect 12 is formed.

  7 and 8 show the physical significance of the defect patterns shown in FIGS. FIG. 7 shows a case where a scratch such as a relatively narrow width and dirt such as a fingerprint are present on the optical disc as the defect 13. In such a case, alternative recording (replacement) does not occur in continuous tracks, but alternative recording can occur intermittently. This corresponds to the defect pattern of FIG. FIG. 8 shows a case where a scratch having a relatively wide width or a fingerprint is present as a defect 13 on the optical disc. In such a case, alternative recording (replacement) may occur in continuous tracks. This corresponds to the defect pattern of FIG. That is, FIG. 5 and FIG. 6 can be said to be defect patterns simulating defects that can actually occur, such as scratches and fingerprints. A defect pattern in which defects such as scratches and fingerprints are simulated in this way is referred to as defect pattern III. Also in the defect pattern III, the reproduction performance can be quantitatively evaluated by changing the number or position of the defects 12 as in the case of the defect pattern I and the defect pattern II. For example, when defects 12 are formed in a total of 16 clusters per 10 tracks, defects 12 are formed in a total of 16 clusters every 5 tracks, and defects 12 are formed in a total of 16 clusters every 2 tracks. When the defect 12 is formed in a total of 16 clusters for each track, four types are formed on the evaluation optical disc 10, and it is determined in which pattern the reproduction data is dropped or interrupted. Reproduction performance can be quantitatively evaluated.

  As described above, there are three defect patterns I, II, and III in the defect pattern formed on the evaluation optical disk 10, and these defect patterns can be formed on the evaluation optical disk 10 in an appropriate combination. . For example, the defect pattern I and the defect pattern II are formed on the evaluation optical disk 10, the defect pattern II and the defect pattern III are formed on the evaluation optical disk 10, or the defect pattern I and the defect pattern III are formed on the evaluation optical disk 10. And so on. The defect patterns I, II, and III are different defect patterns, and the influence on the reproduction performance of the optical disc apparatus, that is, the load on the reproduction performance is different. Accordingly, a plurality of defect patterns are formed on the evaluation optical disk 10 and the reproduction performance can be quantitatively evaluated with higher accuracy by evaluating which defect pattern causes dropped frames or interruptions in the reproduction data. it can. For example, when the defect pattern I and the defect pattern II are compared, in many cases, the defect pattern I has a larger load on the reproduction performance. Therefore, it can be evaluated that the former is superior in reproducing performance between the optical disk apparatus in which the reproduction data has dropped frames in the defect pattern I and the optical disk apparatus in which the reproduction data has dropped frames in the defect pattern II. Also, as described above, the reproduction performance can be quantitatively evaluated according to the number and position of the defects 12 in the defect pattern I or the defect pattern II. Evaluation is possible. As a most preferred example, the defect patterns I, II, and III are all formed on one evaluation optical disc 10.

  FIG. 9 shows a format of the evaluation optical disc 10 on which all the defect patterns I, II, and III are formed. A total of 16 chapters from chapter 1 to chapter 16 are recorded in the data area. No defect 12 is formed in the chapter 1. In chapters 2 to 4, defects 12 are formed in the defect pattern II, that is, in continuous clusters. In chapter 2, defects 12 are formed in a total of three clusters for one track, in chapter 3, defects 12 are formed in a total of six clusters for two tracks, and in chapter 4 a total of six for every two tracks. Defects 12 are formed in a total of 18 clusters for the track. In these defective areas, alternative recording is performed in the internal spare area ISA0.

  Further, in chapters 5 to 8, a defect pattern I, that is, a defect 12 is formed for each cluster. One defect 12 is formed in the chapter 5, four defects 12 are formed in the chapter 6, eight defects 12 are formed in the chapter 7, and 16 defects 12 are formed in the chapter 8. Is done. In these defective areas, alternative recording is performed in the internal spare area ISA0.

  Further, in the chapters 9 to 12, the defect pattern I is formed again, that is, the defect 12 is formed for each cluster. One defect 12 is formed in the chapter 9, four defects 12 are formed in the chapter 10, eight defects 12 are formed in the chapter 11, and 16 defects 12 are formed in the chapter 12. Is done. In these defective areas, alternative recording is performed in the external spare area ISA0.

  Further, the defect 12 is formed in the chapter 13 to the chapter 16 with a defect pattern III, that is, a pattern in which a defect such as a scratch or a fingerprint is simulated. A total of 16 defects 12 are formed on the chapter 13 every 10 tracks, a total of 16 defects 12 are formed on the chapter 14 every 5 tracks, and a total of 16 defects 16 are formed on the chapter 15 every 2 tracks. A total of 16 defects 12 are formed in each chapter 16 in each chapter. In these defective areas, alternative recording is performed in the external spare area OSA0. In the above description, the optical disk having only one recording layer has been described as an example. However, the present invention is also applicable to an optical disk having a plurality of recording layers.

  For reference, FIG. 10 shows a defect pattern in chapter 4, FIG. 11 shows a defect pattern in chapter 13, and FIG. 12 shows a defect pattern in chapter 15. 1, 3, 5, 6, 10, 11, and 12, for convenience of explanation, the defect patterns in the corresponding chapter are schematically shown. Note that it does not correspond to the position of. The actual position is as shown in the start position of FIG.

  FIG. 13 shows an example of a processing flowchart for mounting the evaluation optical disk 10 having a plurality of defect patterns I, II, and III thus formed on the optical disk apparatus to be inspected and evaluating the reproduction performance of the optical disk apparatus. It is a flowchart which reproduces | regenerates in an order from the thing with a small load with respect to reproduction | regeneration performance.

  First, the evaluation optical disk (inspection adjustment disk) 10 is mounted on the optical disk device to be inspected (S101). Then, the reproduction of chapter 1 is started (S102). As shown in FIG. 9, since the defect 12 is not formed in the chapter 1, it should be able to be reproduced without any problem. After the chapter 1 is reproduced, the process proceeds to the chapter 2 and the reproduction of the chapter 2 is started (S103).

  The chapter 2 includes a total of three defects 12 of the defect pattern II. Therefore, the optical pickup is sought to the internal spare area ISA0 in the three defective areas (three consecutive clusters). Then, the quality of the reproduction data obtained with the seek operation is evaluated (S104). Specifically, the evaluation of the reproduction data is the presence or absence of frame dropping, video skipping, and video interruption. If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is evaluated to be extremely low (S111). If no frame dropout or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to the next chapter 3 to start the reproduction of chapter 3 (S105).

  The chapter 3 has a total of six defects 12 of the defect pattern II. Therefore, the optical pickup is sought to the internal spare area ISA0 in these six defective areas (six consecutive clusters). Then, the quality of the reproduction data obtained with the seek operation is evaluated (S106). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S104, but the playback performance is still low and poor. (S111). If no frame dropout or the like occurs in the reproduction data, the evaluation result is OK, jumps over to the next chapter 4 and shifts to chapter 5 to start reproduction of chapter 5 (S107). The reason for shifting to chapter 5 instead of chapter 4 is that the magnitude of the load that the defects of chapter 4 and chapter 5 give to the reproduction performance is taken into consideration, and it is considered that chapter 4 has a larger load than chapter 5. It is.

  The chapter 5 has one defect 12 of the defect pattern I. Therefore, the optical pickup is sought to the internal spare area ISA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S108). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S106, but the playback performance is still low and poor. (S111). If no frame dropping or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 9 to start reproduction of chapter 9 (S109). The transition from chapter 5 to chapter 9 is also in consideration of the magnitude of the load that the defects of chapter 6 to chapter 9 give to the reproduction performance.

  The chapter 9 has one defect 12 of the defect pattern I. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S110). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than that evaluated as NG in S108, but the playback performance is still low and poor. (S111). If no frame dropping or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 13 to start reproduction of chapter 13 (S112).

  The chapter 13 has a total of 16 defects 12 of the defect pattern III. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S113). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than that evaluated as NG in S110, but the playback performance is still low and poor. (S118). If no frame dropping or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 4 and reproduction of chapter 4 is started (S114).

  The chapter 4 has a total of 18 defects 12 of the defect pattern II. Therefore, the optical pickup is sought to the internal spare area ISA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S115). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S113, but the playback performance is still low and poor. (S118). If there is no frame dropping or the like in the reproduction data, the evaluation result is OK, the process proceeds to chapter 14 and reproduction of chapter 14 is started (S116).

  The chapter 14 includes a total of 16 defects 12 of the defect pattern III. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S117). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S115, but the playback performance is still low and poor. (S118). If no frame dropping or the like has occurred in the reproduction data, the evaluation result is OK, the process proceeds to chapter 15 and reproduction of chapter 15 is started (S119).

  The chapter 15 has a total of 16 defects 12 of the defect pattern III. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S120). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S117, but the playback performance is still low and poor. (S127). If no frame dropout or the like has occurred in the reproduction data, the evaluation result is OK, the process proceeds to chapter 16 and reproduction of chapter 16 is started (S121).

  The chapter 16 has a total of 16 defects 12 of the defect pattern III. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S122). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than that evaluated as NG in S120, but the playback performance is still low and poor. (S127). If there is no frame drop or the like in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 6 to start reproduction of chapter 6 (S123).

  The chapter 6 includes a total of four defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the internal spare area ISA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S124). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S122, but the playback performance is still low and poor. (S127). If there is no frame dropping or the like in the reproduction data, the evaluation result is OK, the process proceeds to chapter 10, and reproduction of chapter 10 is started (S125).

  The chapter 10 has a total of four defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S126). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than that evaluated as NG in S124, but the playback performance is still low and poor. (S127). If there is no frame dropping or the like in the reproduction data, the evaluation result is OK, the process proceeds to chapter 7 and reproduction of chapter 7 is started (S128).

  The chapter 7 has a total of eight defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the internal spare area ISA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S129). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disk apparatus is relatively better than that evaluated as NG in S126, but the playback performance is still low and poor. (S137). If no frame dropping or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 11 to start reproduction of chapter 11 (S130).

  The chapter 11 includes a total of eight defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S131). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better or similar to that in the case of being evaluated as NG in S129. It is evaluated that the performance is low and defective (S137). If no frame dropout or the like has occurred in the reproduction data, the evaluation result is OK, the process proceeds to chapter 8 and reproduction of chapter 8 is started (S132).

  The chapter 8 has a total of 16 defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the internal spare area ISA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S133). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than that evaluated as NG in S131, but the playback performance is still low and poor. (S137). If no frame dropout or the like occurs in the reproduction data, the evaluation result is OK, and the process proceeds to chapter 12 to start reproduction of the last chapter 12 (S134).

  The chapter 12 has a total of 16 defects 12 of the defect pattern I. Therefore, the optical pickup is sought to the external spare area OSA0 in this defective area. Then, the quality of the reproduction data obtained with the seek operation is evaluated (S135). If dropped frames or interruptions occur in the playback data, the evaluation result is NG, and the playback performance of the optical disc apparatus is relatively better than or comparable to that evaluated as NG in S126, and the playback performance still remains. Is evaluated as low and defective (S137). If no frame dropout or the like occurs in the reproduction data, the evaluation result is OK, and it is evaluated as a non-defective product because the reproduction performance is excellent (S136).

In the processing of FIG. 13, the defects are arranged in ascending order of load for reproduction performance as follows.
Chapter 1 <Chapter 2 <Chapter 3 <Chapter 5 = Chapter 9 <Chapter 13 <Chapter 4 <Chapter 14 <Chapter 15 <Chapter 6 <Chapter 6 = Chapter 10 <Chapter 7 = Chapter 11 <Chapter 8 = Chapter 12

  Chapter 5 and chapter 9, chapter 6 and chapter 10, chapter 7 and chapter 11, chapter 8 and chapter 12 are different depending on whether they seek to the internal spare area ISA0 or the external spare area OSA0. It is considered to be the same level.

  In the process of FIG. 13, the reproduction performance of the optical disk apparatus is evaluated as a non-defective product (S136) and a defective product (S111, S118, S127, S137). For example, when evaluated as a defective product in S111, the lowest evaluation level is “1”. When evaluated as a defective product in S118, the next evaluation level is “2” and evaluated as a defective product in S127. In this case, the next evaluation level is “3”, the next evaluation level is “4” when the product is evaluated as a defective product at S137, and the highest evaluation level “5” is assigned when the product is evaluated as a non-defective product at S136. You may evaluate.

  In this way, it is possible to quantitatively evaluate the reproduction performance of the optical disc apparatus by forming different defects 12 in chapters 1 to 16 and evaluating the reproduction data by sequentially reproducing the reproduction performance from the one with the smallest load. it can.

  In the present embodiment, as shown in FIG. 9, the defect 12 is formed in the inner chapters 2 to 4 with the defect pattern II, and the defect 12 is formed in the middle chapters 5 to 12 with the defect pattern I. In the outer chapters 13 to 16, the defect 12 is formed with the defect pattern III. For example, in the inner peripheral chapters 2 to 4, the defect 12 is formed with the defect pattern I, and the inner peripheral chapters 5 to 12. The defect 12 may be formed by the defect pattern II, the defect 12 may be formed by the defect pattern III in the outer chapters 13 to 16, or the defect pattern III may be formed in the inner chapters 2 to 4. The defect 12 is formed with the defect pattern II in the middle chapters 5 to 12 and the defect pattern I is formed in the outer chapters 13 to 16. Recessed 12 may be formed.

  In the present embodiment, the playback is performed in order from the chapter with the smallest load in terms of the playback performance, but it is also possible to play back in the order from the chapter with the largest load.

  Further, in this embodiment, since the playback is performed in order from the chapter with the smallest load for the playback performance, the playback is not performed in the order of chapters (for example, the chapter 3 jumps to the chapter 5), but the playback performance in the chapters 1 to 16 Defects 12 may be formed so that the load on increases in this order.

  In this embodiment, it is assumed that both the internal spare area ISA0 and the external spare area OSA0 exist. However, only the internal spare area ISA0 or only the external spare area OSA0 may be used. When only the internal spare area ISA0 is used, all defective areas in the data area are recorded by replacement using the internal spare area ISA0. The same applies to the external spare area OSA0 alone.

  Furthermore, in the present embodiment, when the defect 12 is formed for each cluster, the defect 12 is formed using laser light. However, the defect 12 may be formed by any other method, for example, a stamper or the like. .

  10 Evaluation optical disc, 12, 13 Defect.

Claims (9)

A data area;
A spare area in which data is alternatively recorded when a defect exists in the data area;
Have
Defects are formed in cluster units in the data area, and the defects include first patterns alternately formed for each cluster, second patterns formed in continuous clusters, and one track at a specific portion of the optical disk. An optical disc for reproducing performance evaluation of an optical disc apparatus, which is formed by mixing at least any two of the third patterns formed for every or every several tracks. The optical disc according to claim 1,
An optical disc for reproducing performance evaluation of an optical disc apparatus, wherein the defect is formed by mixing all of the first pattern, the second pattern, and the third pattern. The optical disc according to claim 1,
An optical disc for reproducing performance evaluation of an optical disc apparatus, in which a defect is present in the data area, and the data has a plurality of layers having alternative recording areas. The optical disk according to any one of claims 1 to 3,
The data is recorded as a plurality of chapters in the data area,
An optical disc for reproducing performance evaluation of an optical disc apparatus, wherein the defect is formed in each of the first pattern, the second pattern, and the third pattern so that each chapter has a different number or position. The optical disk according to claim 4, wherein
A defect of any one of the first pattern, the second pattern, and the third pattern is formed in a plurality of inner peripheral chapters, and the remaining two patterns are included in a plurality of chapters in the inner periphery. An optical disc for reproducing performance evaluation of an optical disc apparatus in which a defect of any one of the above patterns is formed and a defect of the remaining one pattern is formed in a plurality of chapters on the outer periphery. The optical disk according to claim 5, wherein
The second pattern defect is formed in a plurality of inner peripheral chapters, the first pattern defect is formed in a plurality of middle peripheral chapters, and the third pattern defect is formed in a plurality of outer peripheral chapters. An optical disk for evaluating the reproduction performance of an optical disk device. An evaluation method for evaluating the reproduction performance of an optical disk device by reproducing an evaluation optical disk,
The evaluation optical disc has a data area and a spare area in which data is alternatively recorded when a defect exists in the data area, the defect is formed in cluster units in the data area, and the defect is At least one of a first pattern formed alternately for each cluster, a second pattern formed for continuous clusters, and a third pattern formed for each track or every several tracks on a specific portion of the optical disk Or two patterns mixed together,
An optical pickup seek operation between the data area and the spare area due to a defect in at least any one of the first pattern, the second pattern, and the third pattern after reproducing the evaluation optical disk An evaluation method characterized in that the reproduction performance of the optical disc apparatus is evaluated by evaluating reproduction data quality associated therewith. The method of claim 7, wherein
The defect is formed by mixing all of the first pattern, the second pattern, and the third pattern,
Reproducing the evaluation optical disk and evaluating the reproduction data quality accompanying the seek operation of the optical pickup between the data area and the spare area due to the defect of the first pattern, the second pattern, and the third pattern. And evaluating the reproducing performance of the optical disc apparatus. The method of claim 8, wherein
The data is recorded as a plurality of chapters in the data area,
In each of the first pattern, the second pattern, and the third pattern, the defect is formed so that the number or position is different for each chapter so that the load on the reproduction performance is different for each chapter. Formed,
An evaluation method characterized in that the reproduction performance of the optical disc apparatus is evaluated by reproducing the data in order from the chapter with the smallest load and evaluating the reproduction data quality.

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