WO2014175667A1 - Information storage medium and information storage medium reproducing device and method therefor - Google Patents

Abstract

Provided are an information storage medium and an information storage medium reproducing device and a method therefor. The present information storage medium includes at least one disk layer sequentially laid, which disk layer includes a record region for recording data and a layer distinction region for identifying each disk layer, which layer distinction region includes the information of the number of the entire layers of the information storage medium.

Description

Information storage medium, information storage medium reproducing apparatus and information storage medium reproducing method

The present invention relates to an information storage medium, an information storage medium reproducing apparatus, and a method of reproducing an information storage medium, and more particularly, to data of an information storage medium quickly and accurately in an information storage medium having at least one disc layer including total layer number information. An information storage medium, an information storage medium reproducing apparatus, and an information storage medium reproducing method for reproducing the same.

In general, an optical information storage medium, that is, an optical disc, is widely used as an information storage medium of an optical pickup apparatus that records and reproduces information by using a laser beam. The optical information storage mediums mainly use an information recording capacity and a laser to be used. CD (compact disc), Digital Versatile Disc (DVD), and Blu-ray Disc (BD) are classified according to the above, and in particular, the Blu-ray Disc has the image content of SD (Standard Definition). TV has been popularized for high definition (HD) TVs, and currently optical discs for video information include DVD-ROM, DVD-RAM, DVD-R / RW, DVD + R / RW. It has 4.7GB for single layer and 8.5GB for two layers, and BD-ROM / R / RE has a storage capacity of 25GB for single layer and 50GB for two layers, and BD-R as a recording disc. The 4th floor has 128GB of storage, and the BD-RE has 3rd floor. As it has been commercially available with a storage capacity of 100GB. In addition, when the recording density per layer the three-layer disc has been improved to 33.3GB, in the case of a four-layer disc has been improved to a large capacity of 32GB it has disk is realized.

On the other hand, the necessities of the video content having a high resolution and the video display device are increasing so that the next generation video content can cope with the large screen of the display. Accordingly, development of display and camera corresponding to 4Kｘ2K with 4 times the resolution of HDTV is progressing. These 4K images are also called Ultra High Definition (UHD) together with Super High Vision. In addition, video encoding technologies such as MPEG2 and AVC / H264, which are used for Blu-ray discs, are being advanced to HEVC (High Efficiency Video Coding) as a next-generation technology corresponding to UHD.

The amount of information in 4Kx2K video is four times that of Full HD. That is, if conventional video encoding techniques such as MEPG2 and AVC / H264 are applied to 4K video content, recording capacity four times as high as Full HD is required. When HEVC, a next-generation video encoding technology, is applied, the compression efficiency is expected to be about twice that of AVC / H264, so that the amount of information can be compressed up to twice that of Full HD. As can be seen in Figure 1, the BD-ROM recording the current Full HD video content can record about 3 hours worth of video at 50GB, but if you want to record video content of about 3 hours by applying 4Kx2K video HEVC You need 100GB of capacity, twice that of.

Blu-ray discs for recording already include BD-R / RE with 100GB of storage in three layers and BD-R with 128GB of storage in four layers. It can record about 4.1 hours of video with a capacity of 3.2 hours and 128GB, but only about 1.6 hours of video can be recorded because a BD-ROM has only two layers and only 50GB of storage capacity exists. FIG. 2 is a frequency distribution plot of recording time for a Blu-ray Disc movie released in 2011. As shown in FIG. 2, the recording time (or running time) of a movie recorded on a BD-ROM disc is about 1 to 3 hours, and on average is about 2 hours. However, it can be seen that some discs exist whose recording time (or running time) is over 3 hours. In the case of 3D compatible discs, the capacity is about 1.7 times that of 2D. There could be a way to split a movie into two 50GB discs, but the user would have to replace the disc. Since disc replacement during movie watching is a factor that impedes the immersion of high-quality movies, it is preferable to keep one disc if possible. In order to record on one disc, it is necessary to increase the capacity of the BD-ROM, that is, to secure a capacity of 100 GB or more.

Although the reproducing apparatus has a learning function which obtains a good reproduction performance by learning the servo signal and the recording state of each layer at the time of startup, when the number of floors is increased, it takes longer to start the operation, which is inconvenient for the user. There is a problem that makes you feel. Therefore, in order to minimize the inconvenience of the user, it is necessary to minimize the startup time by being less affected by the number of floors.

In the case of the existing BD-ROM DL, the control unit places a collimator lens (CL) of the optical pickup at an intermediate position between the L0 layer and the L1 layer so that disc detection is performed, and the optimum of each layer is performed. The spectroscopic lens is moved to the position of to adjust the servo signal for each layer and optimize the high frequecy signal. When the HF signal was optimized in this way, the spectroscopic lens moved to the disc information area and read the disc information. Therefore, the disc currently being played was a Blu-ray disc, a ROM, and a dual layer. As a result, this series of processes takes longer to start up, and three- and four-layer disks with more layers require much more time. In other words, there is a problem that it takes a long time to determine the disk information. Of course, before all adjustments are made and the disc information area is read, disc information may be obtained by reading the BCA information in the burst cutting area (BCA) area, but not all discs include the burst cutting area (BCA), but the L0 layer. You can only read information from, and not necessarily. In addition, in order to read the BCA, the spindle speed of the optical disc reproducing apparatus must be reached within a certain range, which still takes a long time in determining disc information. Therefore, there is a need for a configuration that can easily determine the disc type and the total number of layers of the disc.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to have a total layer number information area and pattern for each layer of the disc, and to read the total layer number information in each layer, which can be read only by existing devices The present invention provides an information storage medium, an information storage medium reproducing apparatus, and an information storage medium reproducing method, which are made in a simple form and have patterns in the inner and outer specific regions of each layer to facilitate detection of the discrimination signal.

According to an embodiment of the present invention, an information storage medium includes at least one disk layer sequentially stacked, and each of the at least one disk layer includes a recording area and each of which data is recorded. And a layer number determining region for identifying a disk layer, wherein the layer number determining region includes the total layer number information of the information storage medium.

The layer number determining regions provided in each of the at least one disk layer may be formed on tracks having the same radius as each other.

The floor number determining region may be configured of at least one of a continuous groove and a discontinuous groove.

The floor number determining area may be located in a protection zone or a burst cutting area.

The protection region may be located in an area between the burst cutting area (BCA) and the permanent information control data (PIC) or in a range of 58.2 mm to 58.5 mm in the radius of the information storage medium.

The layer number determining area provided in each of the at least one disk layer may be at least one of a recording area and an unrecorded area.

Each of the at least one disc layer may include at least two or more layer number determining areas.

The layer number determining area provided in each of the at least one disk layer may simultaneously identify layer information and total layer number information of each of the disk layers.

On the other hand, according to an embodiment of the present invention for achieving the above object, when the information storage medium including at least one disk layer provided with a layer number determination area for each layer is mounted, the layer number determination area An optical pickup unit for irradiating light to the light; A signal processor which processes reflected light reflected from the layer number determining region; And a control unit that determines the total number of floors of the mounted information storage medium based on a result of the reflected light processing.

When the reproduction of the information storage medium starts, the optical pickup unit may preferentially irradiate light into the number of layer determination regions of the information storage medium.

The optical pickup unit may radiate light to a protection zone or burst cutting area (BCA) of the information storage medium.

The signal processor may process the reflected light reflected from the layer number determining region of the information storage medium in a state where at least one of a collimator lens control and an actuator tilt control is not performed. have.

On the other hand, according to an embodiment of the present invention for achieving the above object, if the information storage medium including at least one disk layer provided with a layer number determination area for each layer is mounted, the layer number determination area Irradiating light on; Processing the reflected light reflected from the layer number determining region; And determining the total number of floors of the mounted information storage medium based on a result of the reflected light processing.

In the irradiating of the light, when reproduction of the information storage medium is started, light may be first irradiated to the layer number determination area of the information storage medium.

In the irradiating of the light, the light may be irradiated to a protection zone or burst cutting area of the information storage medium.

The processing may include processing reflected light reflected from the layer number determining region of the information storage medium in a state where at least one of a collimator lens control and an tilt control of an actuator is not performed. Can be.

By providing a floor number discrimination area in a specific area of the inner or outer periphery of each layer of the information storage medium, and forming a pattern for floor number discrimination to detect the signal, thereby ensuring compatibility with existing information storage medium reproducing apparatuses and information storage media. Therefore, the information on the total floors of the information storage medium can be quickly recognized and determined.

1 is a table showing running time according to disc capacity according to resolution and codec;

2 is a frequency distribution plot of recording time for a Blu-ray Disc movie released in 2011,

3 is a block diagram illustrating a configuration of an information storage medium according to an embodiment of the present invention;

4 is a sectional view showing a configuration of an information area of each layer of the optical disc;

5A to 5C are cross-sectional views showing that the number-of-layers determining area is located on the inner and outer circumferences of the optical disc;

6A to 6E are diagrams illustrating that the number of layer discrimination regions are located at inner and outer circumferential regions of each layer in an optical disk according to various embodiments of the present disclosure;

7A to 7C illustrate an actual pattern and a determination pattern detected in a layer number determining area for each layer in an optical disc according to various embodiments of the present disclosure;

7D to 7F illustrate HF signals in which the number of layer discrimination areas are recorded in the recording state for each layer in the optical disk according to various embodiments of the present disclosure;

8A and 8B illustrate an HF signal and a binarized signal generated when a layer number determining area is a recorded state and an unrecorded state in each layer of an optical disc according to various embodiments of the present disclosure;

9 is a block diagram schematically illustrating an information storage medium reproducing apparatus according to an embodiment of the present invention;

10 is a block diagram illustrating in detail an apparatus for reproducing an information storage medium according to an embodiment of the present invention;

11 is a flowchart illustrating a method of reproducing an information storage medium according to various embodiments of the present disclosure.

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

3 is a block diagram illustrating a configuration of an information storage medium according to an embodiment of the present invention. The information storage medium 100 according to an embodiment of the present invention includes at least one disk layer 110, 120, 130 sequentially stacked. For example, the information storage medium 100 may be a compact disc (CD), a digital versatile disc (DVD: Digital Versatile Disc), a Blu-ray Disc (BD), or a Blu-ray ROM disc (BD-). ROM Disc) may be one of various types of storage media. However, it is not limited to the storage medium mentioned herein. Hereinafter, for convenience of description, a Blu-ray ROM disk is described as a reference, but the inventive concept may be applied to other similar information storage media.

Each of the at least one disc layer 110, 120, 130 includes a recording area 111, 121, 131 on which data is recorded, and a layer number determination area 112, 122, for identifying each disc layer 110, 120, 130. 132). The recording areas 111, 121, and 131 are physical areas for recording data on the surface of the disc layers 110, 120, and 130, except for the layer number determination areas 112, 122, and 132, which will be described later. The floor number determination areas 112, 122, and 132 refer to a physical area including information capable of determining the total number of floors of the information storage medium 100. The laser may be irradiated to the floor number determining areas 112, 122, and 132, and the information on the total number of floors may be grasped through the reflected light.

In an embodiment, the number-of- layer determination regions 112, 122, and 132 provided in each of the at least one disk layer 110, 120, and 130 may be formed on tracks having the same radius as each other. For example, when the number of floor discrimination areas are formed at different radii in each layer, the information storage medium reproducing apparatus must move to a position of a different radius to detect information each time the layers are moved. Therefore, not only does it take time to move, but there is also a need to secure an area sufficient to form a pattern at another radial position. However, if the tracks are formed at the same radius in each layer, unnecessary time can be reduced, and the start time until disc playback is shortened.

In an embodiment, the floor number determining region 112, 122, 132 may exist on a predetermined track of the Blu-ray ROM disk. First, referring to FIG. 4 to describe the structure of a Blu-ray ROM disk, in the case of a Blu-ray ROM optical disk, a burst cutting area (BCA) region and lead-in in which a media ID for copyright information is recorded is recorded in an inner zone of the Blu-ray ROM optical disk. There exists a zone, and there is a lead-out zone on the outer zone, and a data zone in between. In the lead-in area, there is a permanent information control data (PIC) in which disk management information is recorded.

For example, the number of floor determination areas 112, 122, and 132 are the protection zones in the System Dectyption Blu-ray Disk Read-Only Format Basic Format Specification version 1.0 pre july 9th, 2004. It can be located in the defined area. First, the floor number determination areas 112, 122, and 132 may be located in the protection area 1 that is an area between the burst cutting area (BCA) and the permanent information control data (PIC) zone on the inner zone. The Blu-ray ROM format standard defines a burst cutting area (BCA) region as a radius of 21.0 mm to 22.2 mm, and defines a permanent information control data (PIC) region as a position of 22.5 mm to 23.2 mm. Therefore, the protective region 1 is located in the region of the disk radius of 22.2 mm to 22.5 mm. Secondly, the number of floor determination regions 112, 122, and 132 may be located in the protection region 3 located in the range of 58.2 mm to 58.5 mm in the radius of the disk, which is the end of the outer zone.

In another example, the floor number determining areas 112, 122, and 132 may be located in a burst cutting area (BCA) area. When the number of floor determination areas 112, 122, and 132 are located in the burst cutting area (BCA) area, the width of the burst cutting area (BCA) area is wider than the width of the protection area. The width of the 132 may be variously configured within the width of the burst cutting area (BCA) area, and may be variously configured. For example, if the width of the floor number determining regions 112, 122, and 132 is widened, it may be advantageous to easily extract the total floor information.

5A to 5C are diagrams illustrating a case where a layer number discrimination pattern is formed in three regions in which the layer number discrimination region described above can be located in the case of a four-layer disk. Each figure shows a cross section of an information storage medium 100 having four layers L0, L1, L2, L3. 6A to 6C are diagrams illustrating a case in which a layer number discrimination pattern is formed in three regions in which a layer number discrimination region may be located. Here, for the convenience of description, an embodiment in which a pattern having a different length for each layer is illustrated, but the length of the pattern may be the same in all layers. In the case of a three-layer disk, only three layers, L0, L1, and L2, do not exist, and only two layers, L0 and L1, exist, and one-layer disk contains only L0. The disks of each layer can form a total layer number discrimination pattern in the same area or position as the four-layer disk for each layer.

In an embodiment, the layer number determining area provided in each of the at least one disk layer may be formed to simultaneously identify layer information and total layer number information of each of the disk layers. For example, if the length of the layer discrimination pattern is different for each layer as shown in FIG. 6A, the additional information is obtained from the length of the pattern as well as the total layer number discrimination information. It will also be possible to obtain.

Referring to FIG. 5A, a pattern 510 including layer number determination information may be located in Protection Zone 1. Using a laser emitted from a laser diode (LD) of the optical pickup unit, information may be read from the pattern 510 through laser light collected by an object lens (OL). The protection area 1 is located between the burst cutting area (BCA) area and the permanent information control data (PIC) area. The protection area 1 is an unrecorded area without data recording, and the protection area 1 corresponds to a reserved area. When the number of floor discrimination area is formed between the burst cutting area (BCA) area and the permanent information control data (PIC) area, the width of the floor number discrimination area should be within 0.3 mm. Because as shown in Figure 5a, the Burst Cutting Area (BCA) area is located in the radius 21.0mm ~ 22.2mm of the information storage medium 100, the Permanent Information Control data (PIC) area is located in 22.5mm ~ 23.2mm Because. When the width of the floor determination region is within 0.3 mm, the floor determination region may be formed without being affected by the signal of the burst cutting area (BCA) region and without changing the capacity of the permanent information control data (PIC) region. . As shown in FIG. 6A, in the case of the multi-layered information storage medium 100, the layer number determining regions 611, 612, 613, and 614 are formed in the protection region 1 610 in all layers L0, L1, L2, and L3. Thus, the total number of floor information can be extracted from all the floors.

Referring to FIG. 5B, a pattern 520 including layer number determination information may be located in a burst cutting area (BCA) region. Using a laser emitted from a laser diode (LD) of the optical pickup unit, information may be read from the pattern 520 through laser light collected by an object lens (OL). The BCA (Burst Cutting Area) area can basically detect the signal only at L0, and in L1, L2, and L3, it is difficult to obtain the BCA detection signal because it does not guarantee BCA signal quality. In addition, the BCA (Burst Cutting Area) area is basically located only in the LO, but the BCA (Burst Cutting Area) area may also be displayed in the L1, L2, and L3 by processing by a high-power laser. The burst cutting area (BCA) is an area in which a BCA code for copying content is recorded, including a media ID for copyright information. When the burst cutting area (BCA) is used as the floor number determining area, a pit for the floor number determining area may be formed on all or part of the burst cutting area (BCA). Since the BCA (Burst Cutting Area) has an area of 21.0 mm to 22.2 mm in the radius of the information storage medium 100, an advantage that a sufficient width for the number of floor determination areas can be secured compared to when the floor determination area is formed in the protection area. have. In addition, a layer number discrimination pattern may be formed in the BCA gap region as well as in the burst cutting area (BCA) region. In the burst cutting area (BCA), since there is a gap area having a width of about 3 mm in which the BCA code is not recorded, a width for forming a layer number discrimination pattern is ensured. As shown in FIG. 6B, in the case of the multi-layered information storage medium 100, the layer number determining areas 621, 622, 623, and 624 are formed in the BCA area 620 in all layers L0, L1, L2, and L3. In this case, it is possible to extract the total number of floor information from each floor.

As described above, the BCA code is recorded in the burst cutting area (BCA). Therefore, when the information is read by making a discrimination pattern in the burst cutting area (BCA), the BCA code information is extracted together. Despite the fact that the two signals are extracted together, it is possible to make a total layer number discrimination pattern in the burst cutting area (BCA) area because the BCA pattern is very short, about tens of micrometers, whereas the total layer number discrimination pattern can be made quite long. to be. BCA detection uses the existing complex signal processing method as it is, and the total floor number discrimination signal can be detected by ignoring the BCA signal using only a simple filter or a counter. That is, it is possible to detect the two signals separately. Therefore, since the information storage medium reproducing apparatus does not need a separate operation for detecting the BCA signal after detecting the pattern of the layer number determining region, the startup time required for reproducing the information storage medium can be shortened.

Referring to FIG. 5C, a pattern 530 including floor number discrimination information may be located in Protection Zone 3. Information may be read from the pattern 530 through laser light collected by an object lens (OL) using a laser emitted from a laser diode (LD) of the optical pickup unit. The protection area 3 corresponds to a position of a radius of 58.0 mm to 58.5 mm of the information storage medium 100. In FIG. 5C, an example of forming the layer number discrimination pattern 530 having a width of 0.3 mm at a position of 58.2 mm to 58.5 mm is illustrated. As another example, the layer number determining pattern 530 having a width of 0.3 mm may be formed at another position, and the layer number determining pattern 530 having a width of 0.5 mm may be formed. As shown in FIG. 6C, in the case of the multi-layered information storage medium 100, the number of layer determination regions 631, 632, 633, and 634 are formed in the protection region 3 630 in all layers L0, L1, L2, and L3. Thus, the total number of floor information can be extracted from all the floors.

In the Blu-ray ROM format specification described above, the protection zone 2 is defined in addition to the protection zone 1 and the protection zone 3, in which the layer number discrimination pattern may be formed in FIGS. 5A and 5C. Therefore, although not shown in the above-described drawings, the protection area 2 may also be used as the floor count determination area. It is preferable that the number of floor discrimination areas have a sufficient width for stable optical focusing. However, when a more precise optical focusing technique is provided, a protection area 2 having a narrower width than the protection areas 1 and 3 may also be used as the floor discrimination area. .

However, in the present invention, the layer number determining region is not limited to the Blu-ray ROM format standard. Therefore, when the information storage medium 100 is a type other than a Blu-ray ROM disk, the layer number determining region is a different type of information storage medium. It may be located in an area corresponding to the protection areas 1 to 3 according to the standard of (100).

6D and 6E, each of the at least one disk layer L0, L1, L2, and L3 of the information storage medium 100 may include at least two layer determination regions. As illustrated in FIG. 6D, the protection area 1 and 3, which are different areas, may include the floor count determination area, respectively. For example, it is possible to form the layer number discrimination pattern 641 in the protection region 3 in the L0 layer and to form the layer number discrimination pattern 642 in the protection region 1. In addition, the present invention is not limited thereto, and all possible combination patterns, such as forming a layer number discrimination pattern in the protection region 1 and the burst cutting area (BCA), may be possible. FIG. 6E shows an embodiment in which two floor number determining regions are formed at different positions of the same protection region 1. The reason why such a discrimination pattern is formed in duplicate is to make it easier to discriminate the total number of floors. The information storage medium will be rotated and the pattern formed on the information storage medium will be read. In the case of forming the discrimination pattern in duplicate, the laser light will be irradiated onto the discrimination pattern more quickly. It is also a supplement to the case where a part of a specific area is damaged due to a disk defect (bubble, scratch, black dot, etc.).

In addition, in the information storage medium 100, the total number of floor information may be different for each floor. This means that the sync information is different for each floor, which means that the syncs of the floor number determination areas do not necessarily have to coincide on the same line vertically.

In an embodiment, a pattern may be formed in at least one of a continuous pit and a discontinuous groove pit in the floor count determining region. 7A to 7C are diagrams illustrating a detection pattern in which the number of layer discrimination regions are made for each layer in the optical disk, and FIGS. 7D to 7F are HF (High Frequency) obtained when the layer number discrimination region is made in the recording state for each layer in the optical disk. ) Is a diagram showing a signal. Here, for the convenience of description, an embodiment of forming a pattern having a different length for each layer is illustrated, but the length of the pattern may be the same in all layers.

7A to 7C are diagrams showing a plan view when the pattern of the layer number determining area is viewed from above along the track direction along with the actual determination pattern. FIG. 7A illustrates a case in which patterns 711, 713, 715, and 717 are made of continuous grooves. The determination patterns 712, 714, 716, and 718 shown below the actual patterns 711, 713, 715, and 717 correspond to signals obtained by binarization after being detected as HF signals. It can be confirmed that the determination patterns 712, 714, 716, and 718 are obtained in response to the actual patterns 711, 713, 715, and 717 formed of continuous grooves. FIG. 7B illustrates an example in which patterns 721, 723, 725, and 727 are made of discontinuous grooves. Looking at the patterns 723, 725, and 727 shown in the L1, L2, and L3 layers, it is clearly seen that they are formed as discrete pit. As in the case where the pattern is formed by the continuous pit, the judgment patterns 722, 724, 726, and 728 are obtained corresponding to the actual patterns 721, 723, 725, and 727, which are composed of discontinuous grooves. Lose. FIG. 7C illustrates an exemplary embodiment in which a combination of continuous grooves and discontinuous grooves is grouped. Various types of patterns may be formed by various combinations. Corresponding to the portion where the grouped patterns 731, 733, 735, and 737 are present, the determination patterns 732, 734, 736, and 738 are obtained. For example, in the case of grouping, even if there is a portion without a pit in the middle, a determination pattern such as a determination pattern obtained in the case of a continuous pit may be extracted in the signal processing process.

7D to 7F show a pattern formed by the continuous grooves, the discontinuous grooves, and a combination thereof shown in FIGS. 7A to 7C in the recording area, and the portions thereof in the focus control state at the time of reproduction using the information storage medium reproducing apparatus, respectively. It is an exemplary figure which shows the HF (High Frequency) waveform obtained from the disk of the present invention. The HF of the recording pattern area is generally made by forming a pit, and a simple pattern or several patterns can be used. This groove causes the HF signal waveform to appear sin in the focus servo control situation. In addition, a simple DC waveform appears in an area where no groove is formed. For example, although the lengths of the grooves of each layer are differently formed in FIG. 7A, the lengths of the regions in which the sin waveform appears in FIG. 7D may be differently formed in correspondence to the lengths of the grooves of the respective layers. The grooved region shows sin waveform 741 and the grooveless region shows DC waveform 742. In FIG. 7E, the sin waveform 751 is detected in the region where the groove is formed corresponding to the discontinuous groove pit formed in FIG. 7B, and the DC waveform 752 appears in the region without the groove. In FIG. 7F, the HF waveform is detected corresponding to the combined pattern formed in FIG. 7C. In this case, since the sinusoidal portion of the combination pattern shows a sin waveform, and the portion without the groove shows a signal up and down to a position representing the DC waveform, the shape of the overall waveform 761 appears different from the previous cases. Due to the waveform 761, even in the combination as shown in FIG. 7C, the same judgment pattern as that in the case where the continuous pit of FIG. 7A is formed (for example, the judgment patterns of 712 and 732) is obtained.

8A and 8B show HF (High Frequency) detection signals in the recording area and the unrecorded area, respectively, and binarized them into digital signals. It is possible to extract information for determining the total number of floors through the HF signal, which can be simply implemented through analog signal processing and digital signal processing of the optical disc system. For example, the HF signal illustrated in FIG. 8A may be converted into a digital signal 820 by determining, filtering, and binarizing the reference level 810. 8A illustrates a process of binarizing an HF signal 830 obtained from a recording pattern to obtain a digital signal 820. FIG. 8B illustrates a process of binarizing an HF signal 860 obtained from an unrecorded pattern to obtain a digital signal 850. It is shown. In the unrecorded pattern, the HF signal 860 appears as a DC waveform. The difference between the two is that the HF signals 830 and 860 are reversed, which means that the digital signals 820 and 850 of the same type can be obtained by different reference level 810 and 840 settings. Alternatively, the reference level may be set together but obtained by inverting a signal obtained in the unrecorded area. Since the number of layers information can be obtained through various methods of analog signal processing and digital signal processing, the method illustrated in FIGS. 8A and 8B is not limited thereto.

Thus, through the information storage medium 100 in which a special pattern is formed in a specific area of the inner or outer circumference of each layer, it is possible to quickly recognize and determine the total number of floors. As a result, it is necessary to reproduce the information storage medium 100. The effect of saving time can be obtained.

Hereinafter, an information storage medium reproducing apparatus 200 capable of reproducing the information storage medium 100 will be described. However, the information storage medium reproducing apparatus 200, which will be described below, may also reproduce an existing information storage medium that does not have a layer number determination area in addition to the information storage medium 100 described above. The compatibility of the information storage medium reproducing apparatus 200 will be described later.

9 is a block diagram schematically illustrating an information storage medium reproducing apparatus 200 according to an exemplary embodiment. Referring to FIG. 9, the information storage medium reproducing apparatus 200 according to an exemplary embodiment of the present invention includes an optical pickup unit 210, a signal processor 220, and a controller 230.

The optical pickup unit 210 is configured to irradiate and reflect light onto a layer surface of the information storage medium and to detect the reflected light. When the reproduction of the information storage medium starts, the information storage medium rotates in a non-contact state with the optical pickup unit 210, and the optical pickup unit 210 irradiates light onto the layer surface of the information storage medium. In particular, the optical pickup unit 210 irradiates light to the layer number determining region when an information storage medium including at least one disk layer provided with a layer number determining region for each layer is mounted and rotated.

The signal processor 220 processes the reflected light reflected from the layer number determining region. In detail, the signal processor 220 detects the intensity of the reflected light reflected from the layer number determining region and generates and processes a corresponding electric signal. The signal processor 220 amplifies or equalizes the generated signal.

The controller 230 controls overall operations of the information storage medium reproducing apparatus 200. In addition to the driving of the motor to be described later, the controller 230 extracts information on the layer number determining region irradiated with light based on the result of the reflected light processing, and the controller 230 determines the total number of layers of the mounted information storage medium. The operation may be substantially performed by the signal processor 220 under the control of the controller 230.

10 is a block diagram showing the information storage medium reproducing apparatus 200 in detail. When the information storage medium 100 is mounted, the rotating shaft of the information storage medium reproducing apparatus 200 fixes and rotates the information storage medium 100. The controller 230 drives the laser driver 240, and the laser driver 240 emits laser light by supplying a current to a laser diode (not shown). The emitted laser light passes through a beam splitter (not shown) and in turn passes through a polarizing beam splitter (not shown) and the retarder film. Through this process, the laser light whose polarization is changed is incident on the objective lens 280. The objective lens 280 focuses incident light on the surface of the information storage medium.

In one embodiment, the laser light may be preferentially irradiated to the layer number determining area at the stage where the reproduction of the information storage medium is started. In this case, the light reflected from the information storage medium passes through the retarder film again, is reflected through the polarization beam splitter, and enters the photo detector (not shown). The photo detector generates an electrical signal by detecting the intensity of the reflected light, and provides the generated electrical signal to the signal processor 220. The signal processor 220 performs necessary signal processing such as amplification or equalization of the received electric signal. The signal processor 220 generates a servo control signal, particularly a focusing error signal, and provides feedback to the controller 230. The controller 230 drives an actuator 270 and performs focusing control based on the signal. When the focusing control is performed, the controller 230 determines the total number of layers of the mounted information storage medium based on the result of the reflected light processing in the same manner as described above. That is, the layer number information is extracted by binarizing the sin waveform signal or the DC waveform signal generated based on the reflected light for the layer number determination region. The operation may be substantially performed by the signal processor 220 under the control of the controller 230.

In an embodiment, as described in the description of the information storage medium, the number of floor determination areas may be formed in a protection zone or a burst cutting area (BCA) area of the multilayer information storage medium. Therefore, the optical pickup unit 210 irradiates light to the protection area or the burst cutting area (BCA) of the information storage medium.

On the other hand, typically emitted laser light is reflected from a beam splitter (not shown) to a power detector (not shown). The power detector (not shown) converts the detected power into a voltage and provides it to the controller 230, and the controller 230 generates a driving signal of the motor 250 based on the power detector. The motor 250 moves the spectroscopic lens 260 according to the driving signal. In addition, the actuator 270 controls the tilt to maximize the amplitude of the HF signal. However, in the present invention, the total number of floors of the information storage medium is determined while irradiating light to the number of floors determining region without performing the control of the spectroscopic lens 260 or the tilt control using the actuator 270. That is, since the layer number determining region is formed with a groove or unrecorded, the information storage medium reproducing apparatus 200 performs extraction of all the layer number information in the layer number determining region only with a signal read out from the reflected light in the state where only the focusing control is performed. Therefore, the detection of the number of floor information from the floor count determination area proceeds very quickly.

On the other hand, the information storage medium reproducing apparatus 200 of the present invention irradiates a laser beam to the area of the conventional information storage medium corresponding to the layer number determining area even when the information storage medium which does not include the layer number determining area is mounted. However, the area of such a conventional information storage medium will not have a pattern formed as a reserve area. In this case, it is impossible to determine the total number of floors only by the above-described process. The information storage medium reproducing apparatus 200 of the present invention reads the address information from the recording area of the multi-layered information storage medium when the number of layers cannot be determined in the above-described process, that is, when a pattern is not formed in the corresponding area. The configuration of the storage medium reproducing apparatus 200 is controlled. For example, the controller 230 reads the disc information area by performing servo control, tilt control, and collimator lens control. Then, data is read out from the information area and decoded. Based on this information, the address of the recording area is found and playback is started. As described above, the apparatus for reproducing an information storage medium of the present invention can reproduce a conventional information storage medium other than the information storage medium according to the above-described embodiments of the present invention.

Hereinafter, a method of reproducing an information storage medium according to various embodiments of the present disclosure will be described.

11 is a flowchart illustrating a method of reproducing an information storage medium according to various embodiments of the present disclosure. When the information storage medium is mounted on the information storage medium reproducing apparatus (S1105), the optical pickup unit reads the information by irradiating light on the information storage medium. In an embodiment, the optical pickup unit may preferentially irradiate light on the layer number determining region (S1110). ). In addition, since light is irradiated to the layer number determining area, the area to which light is irradiated may correspond to a protection area or a burst cutting area (BCA) area of the mounted information storage medium. Thereafter, the information storage medium reproducing apparatus processes the reflected light reflected from the layer number determining region (S1115). In one embodiment, with at least one of a collimator lens control and an inclination control of an actuator not being performed, the information storage medium reproducing apparatus reflects the reflected light reflected from the layer number determination area of the mounted information storage medium. It can also be processed. Then, on the basis of the processed result, the information storage medium reproducing apparatus first determines whether an information storage medium having a floor number determining area capable of determining the total number of floors is mounted (S1120). If there is no floor count determining area capable of determining the total number of floors (S1120-N), the information storage medium reproducing apparatus determines that the mounted information storage medium is an existing Blu-ray disc and performs automatic adjustment (S1145). Then, the information storage medium reproducing apparatus performs an operation such as determining the total number of floors by a conventional method and starts resuming an existing Blu-ray disc. Specifically, the conventional information storage medium reproducing apparatus performs disc detection with a collimator lens at an intermediate position between the L0 layer and the L1 layer, and then the spectroscopic lens is positioned at an intermediate position between the L1 layer and the L2 layer. The disk determination was performed again by moving the (Collimator Lens). Therefore, when the disk has more layers, it is necessary to repeatedly perform the method of disc determination by moving the spectroscopic lens. If it is determined that there is a layer number determining area (S1120-Y), the information storage medium reproducing apparatus determines how many layers the information storage medium mounted from the information obtained from the reflected light is (S1125). The information storage medium reproducing apparatus determines whether it is a single-layer disc, a two-layer disc, or a three-layer disc or more, and performs automatic adjustment optimized in each case (S1130, S1135, and S1140). Through the optimized automatic adjustment, the time required to start the reproduction of the information storage medium is reduced as compared with the process of performing the automatic adjustment which is determined to be an existing Blu-ray disc (S1145). This is because the total layer number information can be immediately determined without the movement of the collimator lens, which is necessary for determining the total number of layers in the related art.

By this information storage medium reproducing method, it is possible to determine the total floor number information in all layers without track servo control in a simple focus servo control state and without a specified specific double speed and phase locked loop (PLL) operation. The overall starting time will be shortened.

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 an embedded software form, and may be included in each component including the controller 230 of the above-described information storage medium reproducing apparatus 200.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. 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 (15)

1. In the information storage medium,

   At least one disk layer sequentially stacked;

   Each of the at least one disc layer includes a recording area in which data is recorded and a layer number determination area for identifying each disc layer,

   And the layer number determining area includes all layer number information of the information storage medium.
2. The method of claim 1,

   And the layer number discrimination area provided in each of the at least one disk layer is formed in tracks having the same radius as each other.
3. The method of claim 1,

   And the floor number determining region is composed of at least one of a continuous groove and a discontinuous groove.
4. The method of claim 1,

   And the layer number determining region is located in a protection zone or a burst cutting area.
5. The method of claim 4, wherein

   And the protection area is located in an area between the burst cutting area (BCA) and the permanent information control data (PIC) or in a range of 58.2 mm to 58.5 mm in the radius of the information storage medium.
6. The method of claim 1,

   And the layer number discriminating area provided in each of the at least one disk layer is at least one of a recording area and an unrecorded area.
7. The method of claim 1,

   And wherein each of the at least one disc layer comprises at least two or more layer number determining areas.
8. An optical pickup unit for irradiating light to the layer number determining area when an information storage medium including at least one disk layer having a layer number determining area for each layer is mounted;

   A signal processor which processes reflected light reflected from the layer number determining region; And

   And a control unit that determines the total number of floors of the mounted information storage medium based on a result of the reflected light processing.
9. The method of claim 8,

   The optical pickup unit,

   And when the reproduction of the information storage medium starts, preferentially irradiating light to the layer number determination area of the information storage medium.
10. The method of claim 8,

    The optical pickup unit,

    And irradiating light to a protection zone or burst cutting area (BCA) of the information storage medium.
11. The method of claim 8,

    The signal processing unit,

    Reproducing the information storage medium characterized by processing the reflected light reflected from the layer number determination 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.
12. In the information storage medium playback method,

    Irradiating light onto the layer number determining area when an information storage medium including at least one disk layer having a layer number determining area for each layer is mounted;

    Processing the reflected light reflected from the layer number determining region; And

    And determining the total number of floors of the mounted information storage medium based on a result of the reflected light processing.
13. The method of claim 12,

    Irradiating the light,

    And when the reproduction of the information storage medium starts, preferentially irradiating light to the layer number determination area of the information storage medium.
14. The method of claim 12,

    Irradiating the light,

    And irradiating light to a protection zone or burst cutting area (BCA) of the information storage medium.
15. The method of claim 12,

    The processing step,

    Reproducing the information storage medium characterized by processing the reflected light reflected from the layer number determination 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.

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