KR20130135072A - Information storing media, information storing media playing back apparatus and information storing media playing back method - Google Patents
Information storing media, information storing media playing back apparatus and information storing media playing back method Download PDFInfo
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- KR20130135072A KR20130135072A KR1020130054418A KR20130054418A KR20130135072A KR 20130135072 A KR20130135072 A KR 20130135072A KR 1020130054418 A KR1020130054418 A KR 1020130054418A KR 20130054418 A KR20130054418 A KR 20130054418A KR 20130135072 A KR20130135072 A KR 20130135072A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/24018—Laminated discs
- G11B7/24027—Layers; Shape, structure or physical properties thereof
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/23—Disc-shaped record carriers characterised in that the disc has a specific layer structure
- G11B2220/235—Multilayer discs, i.e. multiple recording layers accessed from the same side
Abstract
Discloses an information storage medium. An information storage medium according to an embodiment of the present invention includes at least one disk layer sequentially stacked, and each of the at least one disk layer includes a recording area in which data is recorded and a layer discrimination area for identifying each disk layer. The length of the layer discrimination area provided in each of the at least one disk layer is different from each other in the track direction.
Description
The present invention relates to an information storage medium and a reproduction method thereof, and more particularly, to an information storage medium, an information storage medium reproducing apparatus, and an information storage medium for quickly and accurately reproducing data on an information storage medium in a recording medium having at least one disc layer. A medium playback method.
In general, an optical information storage medium, for example, an optical disc is widely used as an information storage medium of an optical pickup apparatus for recording / reproducing information in a noncontact manner. Blu-ray discs are classified into a compact disc (CD), a digital versatile disc (DVD), and a Blu-ray Disc using blue laser light depending on the information recording capacity. DVD-ROM, DVD-RAM, DVDR / RW, and DVD + R / RW are the optical disc capacities for image information. BD-ROM / R / RE has been developed as a single layer with 25GB capacity and a 2-layer with 50GB capacity, BD-R is a 3-layer recording disc. 100 GB, 128 GB on the 4th floor, and 100 GB on the 3-layer BD-RE. In the case of the 3-layer disc, the recording density per layer is 33.3 GB and the capacity of the 4-layer disc is increased to 32 GB, .
On the other hand, the next generation of image contents, since it corresponds to the large-screen display device, the needs of high-resolution image contents and image display devices are increasing. Therefore, development of display devices and cameras corresponding to 4Kx2K Is underway. These 4K images are also called Ultra High Definition (UHD) along with Super High Vision. In addition, video encoding technologies such as MPEG2 and AVC / H264, which are used as Blu-ray discs, are under progress in standardization of HEVC (High Efficiency Video Coding) as a next generation technology corresponding to UHD.
The information amount of 4Kx2K image is 4 times that of Full HD, and 4 times of recording capacity of full HD is required if the conventional image coding technology such as MEPG2 and AVC / H264 is directly applied to 4K image contents.
Therefore, when HEVC, the next generation image coding technology, is used, the compression efficiency is expected to be twice that of AVC / H264, so the amount of information can be compressed to twice that of Full HD. That is, a BD-ROM recording the full HD movie contents of the present time can record an image equivalent to about 3 hours to 50GB, but a recording capacity of 100GB is required twice when recording a 4Kx2K image using HEVC. (See Fig. 1)
Since Blu-ray discs for recording already have a capacity of 100 GB for BD-R / RE and 128 GB for BD-R 4 layers, images encoded by HEVC are recorded for about 3.2 hours at 100 GB and about 4.1 hours at 128 GB However, since the BD-ROM is only up to 50 GB on the second floor, only about 1.6 hours of video can be recorded. In particular, most of the content recorded on the ROM disk is video, and there are movies with a movie recording time of about 2 hours and an average of 3 hours. In the case of a 3D compatible disk, the capacity needs about 1.7 times as much as 2D. There is a way to divide a single movie title into two 50GB discs. However, because it takes time for users to exchange discs, and because the content is relayed, this can hamper the immersion of movies through high-quality images , It is preferable to make one sheet if possible. In order to record on one disc, it is necessary to increase the capacity of the BD-ROM, that is, a ROM disc capacity of 100 GB or more. In this case, since the BD-ROM is configured with a recording density such as 100 GB of BD-R / RE and 128 GB of BD-R, the optical design of the existing reproducing apparatus is hardly changed, have.
The information storage medium reproducing apparatus has a learning function that obtains a good reproduction performance by learning servo control signals and recording states of each layer at startup, but it takes longer to drive a disc because the number of layers increases, which requires more driving time. You lose.
In the case of the existing Blu-ray Disc, since the layer information is included in the address information, the playback apparatus obtains the address information, so that it is possible to determine which layer is currently being reproduced. It was necessary to move the position of the collimator lens (CL) of the optical pickup so that the spherical aberration was the smallest in the layer. This requires time to drive the spectroscopic lens. In addition, it is necessary to perform tilt control so that the HF (High Frequency) signal amplitude is the largest. However, if it is determined that the target layer is not the target layer after the adjustment is completed, the controller moves to the remaining layer again and automatically adjusts the spherical aberration to be the minimum and the HF signal to the maximum. It takes time. That is, there was a problem that the floor information could not be instantly determined. Therefore, there is a need for a structure of an information storage medium and an information storage medium reproducing apparatus that can reproduce more quickly in an information storage medium having a multi-layer structure.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an information storage medium, an information storage medium reproducing apparatus, and an information storage medium for quickly and accurately reproducing data of an information storage medium in a recording medium having at least one disc layer. This is to provide a medium playback method.
An information storage medium according to an embodiment of the present invention for achieving the above object includes an at least one disk layer sequentially stacked in the information storage medium, each of the at least one disk layer is a data recording And a layer discrimination area for identifying each disc layer, wherein the lengths of the layer discrimination areas provided in each of the at least one disc layer are different from each other in the track direction.
In this case, the layer discrimination areas provided in each of the at least one disk layer may be formed on tracks having the same radius.
In addition, the layer discrimination area of each of the at least one disk layer may be configured as a continuous groove or a discontinuous groove.
In addition, the layer determination area of each of the at least one disk layer may be located in a protection zone.
In addition, the protection area may be located in the range of the inner circumference radius 22.2mm ~ 22.5mm of the information storage medium, or may be located in the range of the outer circumference radius 58.0mm ~ 58.5mm.
In addition, the layer determination area of each of the at least one disk layer may be located in a burst cutting area (BCA).
In this case, the BCA may be located in the range of 21.0 mm to 22.2 mm of the inner circumference of the recording medium.
Further, the layer discrimination area of each of the at least one disc layer may be a recording area or an unrecorded area.
In addition, when the layer determination region of each of the at least one disk layer is composed of discontinuous grooves, the length of the discontinuous grooves may be 2 mm or more, and the distance between the plurality of discontinuous grooves may be 1 mm or less.
In an information storage medium reproducing apparatus according to an embodiment of the present invention for achieving the above object, when an information storage medium including at least one disk layer provided with a layer discriminating area having a different length for each layer is mounted, Determining the length of the layer discriminating region to which the light is irradiated, based on an optical pickup unit for irradiating light to the discriminating region, a signal processing unit processing the reflected light reflected from the layer discriminating region, and a result of processing the reflected light; And a controller for determining the disk layer to which the light is irradiated according to the determined length of the layer determination region.
In this case, when the reproduction of the information storage medium is started, the optical pickup unit may first irradiate light to the layer discrimination area of the information storage medium.
The optical pickup unit may radiate light to a protection zone of the information storage medium.
The optical pickup unit may irradiate light to the burst cutting area (BCA).
In this case, the layer discrimination areas provided in each of the at least one disk layer may be formed on tracks having the same radius.
In addition, the layer discrimination area of each of the at least one disk layer may be configured as a continuous groove or a discontinuous groove.
The signal processor may process the reflected light reflected from the layer discriminating region of the information storage medium when at least one of a collimator lens control and an tilt control of the actuator is not performed. have.
In the information storage medium reproducing method, when an information storage medium including at least one disk layer having a different length layer discrimination area is provided for each layer, light is irradiated to the layer discrimination area to start focus control. Then, the reflected light reflected from the layer discrimination area is processed. The length of the layer discriminating region to which the light is irradiated is determined based on a result of the reflected light processing, and the disk layer to which the light is irradiating is determined according to the length of the determined layer discriminating region. Then, it is checked whether the determined disc layer is the target layer, and playback is started in the case of the target layer, but the layer is moved if it is not the target layer.
In this case, in the light irradiation step, when reproduction of the information storage medium is started, light may be first irradiated to the layer discrimination area of the information storage medium.
In the light irradiation step, light may be irradiated to a protection zone or burst cutting area (BCA) of the information storage medium.
In the signal processing step, the reflected light reflected from the layer discriminating region of the information storage medium in a state where at least one of tracking control, spectroscopic lens control, and tilt control of an actuator is not performed. Can be processed.
In addition, the layer discrimination areas provided in each of the at least one disc layer may be formed on tracks having the same radius as each other.
In addition, the layer discrimination area of each of the at least one disk layer may be configured as a continuous groove or a discontinuous groove.
In addition, the signal processing step may process the reflected light reflected from the layer discriminating region of the information storage medium when at least one of a collimator lens control and an tilt control of an actuator is not performed. Can be.
According to various embodiments of the present disclosure as described above, the present invention provides an information storage medium, an information storage medium reproducing apparatus, and an information storage medium reproducing apparatus for quickly and accurately reproducing data of an information storage medium in a recording medium having at least one disc layer. Provide a method.
1 is a table showing a storage capacity of an optical disc according to a resolution and a codec;
2 is a diagram showing recording time information of a Blu-ray Disc movie title;
3 is a block diagram showing a configuration of an information storage medium according to an embodiment of the present invention;
4 is a cross-sectional view showing a configuration of an information area of each layer of an optical disk,
5 to 7 are cross-sectional views at the inner circumferential position of the information storage medium showing the layer discriminating area.
8 to 10 show an embodiment of each disc layer having layer determination regions of different lengths,
11 to 16 illustrate detection signal waveforms of a layer determination region according to various embodiments of the present disclosure;
17 is a block diagram showing an essential configuration of an information storage medium reproducing apparatus according to an embodiment of the present invention;
18 is a block diagram showing a detailed configuration of the information storage medium reproducing apparatus, and
19 is a flowchart illustrating a method of reproducing an information storage medium according to various embodiments of the present disclosure.
Various embodiments of the present invention will now be described with reference to the accompanying drawings.
3 is a block diagram showing a configuration of an
The
As described above, a disc having a capacity of 4.7 GB for a single layer and 8.5 GB for a second layer has been developed for a Blu-ray disc, and a 25 GB, 2 layer for a single layer for a playback-only Blu-ray disc (BD-ROM / R / RE). Discs with a capacity of 50 GB have been developed. By including at least one disk layer as described above, a large capacity of the recording medium is realized. In the present specification, for convenience of description, the description will be made based on a Blu-ray ROM disk. However, the inventive concept may be applied to other similar information storage media.
Each of the at least one
In contrast, the
In an embodiment, the
5 shows a cross section of a multi-layered
When the layer discrimination region of the present invention is formed in the boundary region between the BCA and the PIC region, that is, the protection region 1 (51), the BCA has a radius of 21.0 mm to 22.2 mm and a PIC region of 22.5 to 23.2 mm. Therefore, the width of the layer discrimination region of the present invention can be configured within 0.3 mm, and the layer discrimination region can be formed without changing the capacity of the PIC region without being affected by the signal of the BCA. In the case of a multilayer layer structure, a layer discrimination area may be configured for each layer.
The protection region 3 is located between 58.0 mm and 58.5 mm in the outer circumference, but it is also possible to form a layer discrimination region in the protection region 3 61 as shown in FIG. That is, FIG. 6 shows sectional drawing when the layer discrimination area of the
The Blu-ray ROM format standard defines a protection zone 2 in addition to the protection zone 1 and the protection zone 3 as described above. Therefore, although not shown in the above-described drawings, the protection region 2 may also be used as the layer discrimination region. As described above, the Blu-ray ROM format standard defines protection area 1 as the range of the inner circumferential radius of the recording medium 22.2 mm to 22.5 mm, and protection area 3 as the outer circumference radius 58.0 mm to 58.5 mm. In the embodiment of the present invention, since the layer discriminating area should have a sufficient width to stably enable optical focusing, the protection area 1 or the protection area 3 may be mainly used. However, when the more precise optical focusing technology is provided, the protection area 2 It may be used as a layer discrimination area.
However, in the present invention, since the layer discrimination region is not limited to the Blu-ray ROM format standard, when the recording medium is a type other than the Blu-ray ROM disk, the layer discrimination region may be located on the other type of
In another embodiment, a burst cutting area (BCA) according to the above-described Blu-ray ROM format standard may be used as the layer discrimination area. 7 illustrates such an embodiment.
7 is a sectional view of a recording medium having a four-layer disc layer according to an embodiment of the present invention having a layer discrimination area in a BCA area.
BCA is basically only in layer 0 (L0), but due to processing by a high-power laser, layers 1, 2, and 3 (L1, L2, L3) can also display the same area. The BCA is an area in which a BCA code for copy protection, including a media ID for copyright information, is recorded. When the BCA is used as the layer discrimination region, a pit for the layer discrimination region may be formed on all or part of the BCA. In this case, since the information storage medium reproducing apparatus does not need a separate operation for detecting the BCA signal after detecting the layer discrimination region pattern, the start time can be shortened. In other words, both signals can be detected simultaneously. In addition, since the BCA is an area of 21.0 mm to 22.2 mm in the inner circumference, a sufficient width for the layer discrimination area can be secured, thereby enabling accurate discrimination.
In the present invention, at least one disc layer may have layer discrimination areas of different lengths in the track direction. 8 to 10 are diagrams illustrating an embodiment of each disc layer having layer determination regions of different lengths.
As shown in Figs. 8 to 10, the
Fig. 8 shows the difference in track direction length of the layer discrimination area for each layer in the recording medium having a four-layer layer structure according to the present invention. As shown in FIG. 8, the track length of the L0 layer discrimination area is 0, the L1
FIG. 9 shows the difference in track direction lengths of the layer discrimination area for each layer in the recording medium when the layer discrimination area is formed in the
Further, as described above, the layer discrimination region may be formed in some or all regions of the
The above-described layer discriminating region may form a special pattern. The information storage medium reproducing apparatus judges the pattern of the layer discriminating area and discriminates the layer according to its length. In an embodiment, the above-described layer determination area may be formed as a pit. These grooves appear as sin waveforms in the HF signal waveform in the focus servo control situation. This makes it possible to identify the presence of a groove in the servo control phase. By binarizing this waveform, the section length can be obtained. The information storage medium reproducing apparatus performs layer discrimination by identifying the section length. This is described in more detail later.
Alternatively, the layer discrimination area may be left as an unrecorded portion instead of the recording pattern. In this case, an unrecorded section is detected as a layer discrimination area. Since Blu-ray ROM disks generally have a pit formed in the inner circumference thereof, it is possible to distinguish the recording area by not displaying a groove in the layer discrimination area.
In addition, the aforementioned groove may be formed discontinuously on the
10 is a diagram of an
Since the distance A2 between the grooves A1 forms a block, the layer discrimination area may be configured based on the block. For example, in the L1 layer discrimination region, when the track length is 6 mm and the block length A2 is 1 mm, the five pieces are arranged in a row and the distance A2 of each block can be 0.2 mm. If the track length of the L2 layer discrimination area is 13 mm with blocks of the same length, 11 blocks can be arranged. If the track length of the L3 layer discrimination area is 19 mm, 16 blocks A1 with a track length of 1 mm can be configured. Can be.
Meanwhile, as illustrated in FIGS. 5 to 10, the layer discrimination areas provided in each of the at least one disc layer are formed on tracks having the same radius as each other. That is, the information storage medium reproducing apparatus starts layer discrimination from the same starting point on the track of the same radius on each disc layer. This structure allows for faster floor discrimination. That is, since the layer discrimination region exists at a certain position, the information storage medium reproducing apparatus starts reproduction at a predetermined position of the disc layer, and immediately enables layer discrimination.
Hereinafter, the detection signal waveform of the above-described layer determination region will be described.
11 to 16 illustrate detection signal waveforms of a layer determination area according to various embodiments of the present disclosure.
11 and 12 show HF signal waveforms when the information storage medium reproducing apparatus reproduces the layer discrimination area of the recording medium having the four-layer disc layer in the focus servo control state. 11 and 12, grooves are formed in the layer discrimination region. Since the track length of the L0 layer discrimination area is zero, the reproduction waveform shows the DC waveform as it is. However, in the L1 layer discrimination area, since a plurality of grooves are formed at a predetermined length, the sin waveform is detected as shown in FIG. 11. The region where no groove is formed becomes a simple DC waveform because no groove is present. The bin length T1 can be obtained by binarizing this waveform to the threshold Is1. Similarly, if the track length of the L2 layer discrimination region is binarized to obtain T2, and the track length of the L3 layer discrimination region is binarized to obtain T3, the relationship is T1 < T2 < T3. The layer discrimination becomes possible by the information storage medium reproducing apparatus identifying the section length of each layer. FIG. 12 shows the HF signal waveform after passing the HF signal through the low pass filter LPF, and binarization of the HF signal to the threshold Is2 makes it easier to determine each layer.
13 and 14 are HF signal waveforms when the information storage medium reproducing apparatus reproduces the layer discrimination region of the recording medium having the four-layer disc layer in the focus servo control state. In the embodiment of Figs. 13 and 14, the layer discrimination area is configured as unrecorded. 13 shows the HF signal waveform when the layer discriminating area of each layer of the four-layer disc is reproduced in the focus control state in the information storage medium reproducing apparatus. Since the L0 layer discrimination region is 0 and the grooves are formed in the region except the layer discrimination region, the entire signal has a sin waveform. Since the distance corresponding to the track length is unrecorded in the L1 layer discrimination region, the sin waveform is detected in the range in which the grooves are formed except the layer discrimination region, and the unrecorded portion in the layer discrimination region does not have any grooves. do. The bin length T1 can be obtained by binarizing this waveform to the threshold Is3. Similarly, if the track length of the L2 layer discrimination region is binarized to obtain T2, and the track length of the L3 layer discrimination region is binarized to obtain T3, the relationship is T1 < T2 < T3. The information storage medium reproducing apparatus performs layer discrimination by identifying the section length of each layer. Fig. 14 shows the HF signal waveform after passing the HF signal through the low pass filter LPF, and binarizing the HF signal with the threshold value Is4 makes it easier to determine each layer.
15 and 16 show HF signal waveforms when the information storage medium reproducing apparatus reproduces the layer discrimination area of the recording medium having the four-layer disc layer in the focus servo control state. 15 and 16, the layer discrimination region is formed on the BCA. When the layer discrimination region is formed on the BCA, the layer discrimination region can be configured as unrecorded.
Fig. 15 is an HF signal waveform when a layer discrimination area of each layer of a four-layer disc is reproduced in the focus servo control state by the information storage medium reproducing apparatus. Since the L0 layer discrimination region has a length of 0 and the region except the layer discrimination region is also unrecorded, no sin waveform or DC waveform is formed. Since the distance corresponding to the track length is unrecorded in the L1 layer discrimination region, the signal of the layer discrimination region becomes a DC waveform. On the other hand, since the BCA signal has a time width of about 10 m, the width of the BCA signal is negligible compared to the length of the layer discrimination area, so that detection is not a problem. The bin length T1 can be obtained by binarizing this waveform with the threshold Is5. Similarly, if T2 is obtained by binarizing the track length of the L2 layer discrimination region, and T3 is obtained by binarizing the track length of the L3 layer discrimination region, there is a relationship of T1 < T2 < T3. The information storage medium reproducing apparatus performs layer discrimination by identifying the section length of each layer. Similarly, FIG. 16 shows the HF signal waveform after passing the HF signal through the low pass filter LPF, and binarizing the threshold value Is6 makes it easier to determine each layer.
Hereinafter, the configuration and operation of the information storage
17 is a block diagram showing an essential configuration of an information storage
Referring to FIG. 17, an information storage
The
The
The
Hereinafter, the reproduction operation will be described with reference to the detailed configuration of the information storage
18 is a block diagram showing the detailed configuration of the information storage
When the
Initially, at the stage in which information storage medium reproduction starts, laser light may be irradiated to the layer discrimination area. At this time, the light reflected from the information storage medium passes through the retarder film again, is reflected through the polarizing beam splitter, and then enters the photodetector (not shown). The photo detector generates an electrical signal by detecting the intensity of the reflected light and provides the signal to the
In this case, as described in the description of the information storage medium, the layer determination area may be a protection zone or a burst cutting area (BCA) of the multilayer information storage medium.
On the other hand, typically emitted laser light is reflected to the
On the other hand, the information storage
Hereinafter, an information storage medium reproduction method according to various embodiments of the present invention will be described.
19 is a flowchart illustrating a method of reproducing an information storage medium according to various embodiments of the present disclosure.
Referring to FIG. 19, in the information storage medium reproducing method, when an information storage medium including at least one disc layer having different length layer discrimination areas is provided for each layer (S1910), light is irradiated onto the layer discrimination area. The focus control starts (S1920). Then, the reflected light reflected from the layer discrimination region is processed (S1930). The length of the layer discrimination region to which the light is irradiated is determined based on a result of the reflected light processing, and the disk layer to which the light is irradiated is determined according to the length of the determined layer discrimination region (S1940). Then, it is checked whether the determined disc layer is the target layer (S1950), and if it is the target layer, playback starts (S1970), but if it is not the target layer, the layer is moved (S1960).
In this case, in the light irradiation step, when reproduction of the information storage medium is started, light may be first irradiated to the layer discrimination area of the information storage medium.
In the light irradiation step, light may be irradiated to a protection zone or burst cutting area (BCA) of the information storage medium.
In the signal processing step, the reflected light reflected from the layer discriminating region of the information storage medium in a state where at least one of tracking control, spectroscopic lens control, and tilt control of an actuator is not performed. Can be processed.
In addition, the layer discrimination areas provided in each of the at least one disc layer may be formed on tracks having the same radius as each other.
In addition, the layer discrimination area of each of the at least one disk layer may be configured as a continuous groove or a discontinuous groove.
In addition, the signal processing step may process the reflected light reflected from the layer discriminating region of the information storage medium when at least one of a collimator lens control and an tilt control of an actuator is not performed. Can be.
Meanwhile, the above-described information storage medium reproducing method may be stored in the form of a program in a non-transitory information storage medium readable on a computer. Here, the non-transitory readable medium refers to a medium that can store data semi-permanently and can be read by an electronic device, not a medium that stores data for a short time such as a register or a cache. For example, it may be a CD, a DVD, a hard disk, a Blu-ray disk, a USB, a memory card, a ROM, or the like. In particular, the above-described information storage medium reproducing method may be provided embedded in a hardware IC chip in the form of embedded software, and may be included in each component including the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.
100: recording medium 200: information storage medium reproducing apparatus
111 to 131:
205: optical pickup unit 250: signal processing unit
210:
Claims (20)
And at least one disc layer sequentially stacked,
Each of the at least one disc layer includes a recording area in which data is recorded and a layer discrimination area for identifying each disc layer,
And the length of the layer discrimination area provided in each of the at least one disk layer is different in a track direction.
And the layer discrimination area provided in each of the at least one disk layer is formed on a track having the same radius as each other.
And the layer discrimination area of each of the at least one disk layer is composed of continuous grooves or discontinuous grooves.
And the layer discrimination area of each of the at least one disk layer is located in a protection zone.
The protection area is located in the range of the inner circumference radius 22.2mm ~ 22.5mm of the information storage medium, or the information storage medium, characterized in that located in the range of 58.0mm ~ 58.5mm outer circumference.
And a layer discrimination area of each of the at least one disk layer is located in a burst cutting area (BCA).
The BCA is an information storage medium, characterized in that located in the range of 21.0mm ~ 22.2mm inner circumference of the recording medium.
And the layer discriminating area of each of the at least one disk layer is a recording area or an unrecorded area.
When the layer discrimination area of each of the at least one disk layer is composed of discrete grooves,
The length of the discontinuous groove is more than 2mm, the distance between the plurality of discontinuous grooves is formed in less than 1mm information storage medium.
A signal processor which processes reflected light reflected from the layer discriminating area; And
And a controller configured to determine a length of the layer discriminating region to which the light is irradiated based on a result of the reflected light, and to determine a disk layer to which the light is irradiated according to the determined length of the layer discriminating region. Media playback device.
The optical pick-
And when the reproduction of the information storage medium starts, preferentially irradiating light to the layer discrimination area of the information storage medium.
The optical pick-
And irradiating light to a protection zone of the information storage medium.
The optical pick-
And irradiating light to the burst cutting area (BCA).
And the layer discrimination areas provided in each of the at least one disc layer are formed on tracks having the same radius as each other.
And the layer discrimination area of each of the at least one disc layer is constituted by continuous grooves or discontinuous grooves.
The signal processing unit,
Reproducing the information storage medium characterized by processing the reflected light reflected from the layer discrimination area of the information storage medium in a state in which at least one of a collimator lens control and an tilt control of the actuator is not performed Device.
Irradiating light onto the layer discriminating area when an information storage medium including at least one disk layer provided with a layer discriminating area having a different length for each layer is mounted;
Processing the reflected light reflected from the layer discriminating region; And
Determining a length of the layer discriminating region to which the light is irradiated based on a result of the reflected light, and determining a disk layer to which the light is irradiated according to the determined length of the layer discriminating region; How to play media.
The light irradiation step,
And when the reproduction of the information storage medium starts, preferentially irradiating light to the layer discrimination area of the information storage medium.
The light irradiation step,
And irradiating light to a protection zone or burst cutting area (BCA) of the information storage medium.
The signal processing step,
Reproducing the information storage medium characterized by processing the reflected light reflected from the layer discrimination area of the information storage medium in a state in which at least one of a collimator lens control and an tilt control of the actuator is not performed Way.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/KR2013/004747 WO2013180480A1 (en) | 2012-05-31 | 2013-05-30 | Information storage medium, information storage medium reproduction device, and information storage medium reproduction method |
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Application Number | Priority Date | Filing Date | Title |
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US201261653711P | 2012-05-31 | 2012-05-31 | |
US61/653,711 | 2012-05-31 |
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