WO2016135941A1 - Method for determining volume of recorded information and optical information recording and reproducing device using same - Google Patents

Abstract

A photosensitive holographic medium, on being irradiated with light for reproduction, converts an unreacted monomer therein into a photopolymerizable monomer. Therefore, the recording quality of a holographic medium may deteriorate when the address for a management information storage area not yet determined as a recorded area is accessed to acquire the latest management information. The purpose of the present invention is to efficiently determine a recorded area without accessing an unrecorded area in a holographic medium. To solve the above problem, a method for determining the volume of information recorded onto an information recording medium by an optical information recording and reproducing device for recording and reproducing information comprises: a step of generating recording determination information by combining user data with additional information; a step of recording the recording determination information on the information recording medium; a step of reproducing the recording determination information recorded on the information recording medium; and a step of determining whether or not the recording determination information has been preliminarily recorded on the basis of the additional information of the recording determination information reproduced.

Description

Determination method of recorded information amount and optical information recording / reproducing apparatus using the same

The present invention relates to an apparatus and method for recording information on an information recording medium using holography.

Currently, the Blu-ray (registered trademark) Disc standard using a blue-violet semiconductor laser has made it possible to commercialize an optical disc having a recording capacity of about 100 GB even for consumer use. In the future, it is desired to increase the capacity of the optical disk to the same level as the 1 TB HDD (Hard Disk Drive) capacity. However, in order to realize such an ultra-high density with an optical disc, a high-density technology by a new method different from the high-density technology by shortening the wavelength and increasing the objective lens NA is necessary.

While research on next-generation storage technology is underway, hologram recording technology that records digital information using holography is drawing attention. Hologram recording technology is a method in which signal light having page data information two-dimensionally modulated by a spatial light modulator is superimposed on reference light inside the recording medium, and the interference fringe pattern generated at that time is placed in the recording medium. This is a technique for recording information on a recording medium by causing refractive index modulation.

As a method for detecting the recording state of optical disk data recording assuming additional recording, there is, for example, JP-A-4-3368 (Patent Document 1). In Patent Document 1, by referring to a written sector flag area in which a plurality of flags indicating the presence / absence of use of each user sector in an optical disk is referred to, the presence / absence of use of each user record area in each sector is easily determined. There is a description that it can be detected.

Further, regarding the recording mechanism of the hologram recording material, for example, there is JP-A-2014-63104 (Patent Document 2). Patent Document 2 states that “a typical photopolymer material for hologram recording includes, for example, a photopolymerizable monomer, a polymer binder, a plasticizer, and a photopolymerization initiator. The photopolymerization initiator is cleaved, and the photopolymerizable monomer in the vicinity is polymerized using this as a trigger, and the concentration of unreacted monomer decreases in the bright part, and the concentration gradient of the monomer in the dark part. In order to guarantee the generated concentration gradient, unreacted monomer diffuses from the dark part to the bright part, and further the polymerization reaction of the monomer proceeds in the bright part. At this time, if each component is selected so that the difference in refractive index between the photopolymerizable monomer (and its polymer) and the other components becomes large, it depends on the brightness of the light. The pattern is refracted Is recorded as modulation. "It is described as.

In particular, for example, Japanese Patent Application Laid-Open No. 2010-66326 (Patent Document 3) discloses pre-exposure processing and post-exposure processing necessary for hologram recording. Patent Document 3 states that “a photosensitive composition for hologram recording is required to have higher sensitivity. However, the higher the sensitivity of the medium is, the more sensitive it is to weak light. For example, the medium is irradiated by natural light or the like. It is assumed that an undesirable reaction is initiated and progresses within, and that similar undesirable reactions are expected to be caused by thermal external stimuli during storage. " For this reason, it is also described that “in such a hologram recording medium, it is necessary to perform pre-recording exposure to deactivate the polymerization inhibitor immediately before recording”.

JP-A-4-3368 JP 2014-63104 A JP 2010-66326 A

In the conventional optical disc, the information of the area where the data is recorded is stored in the management information of the optical disc. In particular, in the case of a write-once optical disc that cannot be rewritten, the management information is updated and recorded at a different address each time recording is performed. In order to acquire the information, it is necessary to reproduce the latest information of the management information.

In the case of a write once optical disc, data is recorded in an area in which data has already been recorded. In other words, if overwriting is performed, the already recorded data cannot be reproduced, and the physical characteristics of the area are significantly destroyed. , You may lose access. Therefore, especially in the area where adjustment recording is performed to optimize the laser power before data recording is performed, the area where recording is actually performed is accessed, and the area is recorded based on the signal light quantity obtained during reproduction. It is necessary to determine whether it has been recorded or not recorded.

On the other hand, in the case of a hologram medium, the unreacted monomer of the medium is converted into a photopolymerizable monomer, that is, exposed to light by irradiation with light for reproduction. Therefore, it is a recording mechanism different from the conventional optical disc standard, and simply reproducing an unrecorded area becomes a factor that makes it impossible to record in the area. In other words, in the hologram medium, accessing the address of the management information storage area that has not been determined to be recorded in order to acquire the latest management information causes the recording quality to deteriorate. This is because the area for storing the management information itself may become a non-recordable area.

An object of the present invention is to efficiently determine a recording area without accessing, or reproducing, an unrecorded area with respect to the hologram medium.

In order to solve the above problems, for example, the configuration described in the claims is adopted. The present invention includes a plurality of means for solving the above-described problems. For example, the present invention relates to a method for determining the amount of recorded information in an optical information recording / reproducing apparatus for recording / reproducing information on / from an information recording medium. Combining data and additional information to generate recording determination information, recording the recording determination information on an information recording medium, reproducing the recording determination information recorded on the information recording medium, and reproduced recording determination Based on the additional information, it is configured to have a step of determining whether or not the recording determination information has been recorded in advance.

According to the present invention, it is possible to efficiently acquire the amount of information recorded on the hologram medium.

1 is a block diagram of an optical information recording / reproducing apparatus in Embodiment 1. FIG. FIG. 2 is a diagram illustrating a basic optical system configuration of a pickup of the optical information recording / reproducing apparatus in Example 1 and illustrating a recording principle. It is a figure which shows the fundamental optical system structure of the pick-up of the optical information recording / reproducing apparatus in Example 1, and demonstrates the reproduction principle. FIG. 6 is a flowchart of an operation for determining an information recording medium until preparation for recording or reproduction in Example 1 is completed. FIG. 5 is an operation flowchart from recording completion to recording information on an optical information recording medium in Example 1. FIG. 5 is an operation flowchart from the completion of preparation in the first embodiment to the reproduction of information recorded on the optical information recording medium. FIG. 3 is a recording data processing flowchart of the optical information recording / reproducing apparatus in the first embodiment. It is a reproduction | regeneration data processing flowchart of the optical information recording / reproducing apparatus in Example 1. FIG. 1 is a block diagram of a signal generation circuit in an optical information recording / reproducing apparatus in Example 1. FIG. 1 is a block diagram of a signal processing circuit in an optical information recording / reproducing apparatus in Example 1. FIG. 4 is a diagram illustrating an example of a file, a file size, and a final recording address recorded on the optical information recording medium in Embodiment 1. FIG. 4 is a diagram illustrating an example of a file, a file size, and a final recording address recorded on the optical information recording medium in Embodiment 1. FIG. 4 is a diagram illustrating an example of a file, a file size, and a final recording address recorded on the optical information recording medium in Embodiment 1. FIG. 3 is a flowchart showing recording determination of an optical information recording medium in Embodiment 1. It is a figure which shows an example of the additional information in Example 1. FIG. 9 is a recording data processing flowchart of the optical information recording / reproducing apparatus in the second embodiment. FIG. 10 is a reproduction data processing flowchart of the optical information recording / reproducing apparatus in the second embodiment. It is explanatory drawing showing the coupling | bonding of the additional information to the user data in Example 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a recording / reproducing apparatus of an information recording medium for recording and / or reproducing digital information using the holography of the present embodiment. In FIG. 1, the optical information recording / reproducing device 10 is connected to an external control device 91 via an input / output control circuit 90. In the case of recording, the optical information recording / reproducing apparatus 10 receives the information signal to be recorded from the external control device 91 by the input / output control circuit 90. When reproducing, the optical information recording / reproducing apparatus 10 transmits the reproduced information signal to the external control apparatus 91 by the input / output control circuit 90.

The optical information recording / reproducing apparatus 10 includes a pickup 11, a reproduction reference light optical system 12, a cure optical system 13, a disk rotation angle detection optical system 14, and a rotation motor 50, and is an optical information recording medium that is a hologram medium. 1 is configured to be rotatable by a rotary motor 50.

The pickup 11 plays a role of emitting reference light and signal light to the optical information recording medium 1 and recording digital information on the recording medium using holography. At this time, the information signal to be recorded is sent by the controller 89 to the spatial light modulator in the pickup 11 via the signal generation circuit 86, and the signal light is modulated by the spatial light modulator.

When reproducing the information recorded on the optical information recording medium 1, the reproduction reference light optical system 12 generates a light wave that causes the reference light emitted from the pickup 11 to enter the optical information recording medium in a direction opposite to that during recording. Generate. Reproduction light reproduced by the reproduction reference light is detected by a photodetector (to be described later) in the pickup 11, and a signal is reproduced by the signal processing circuit 85.

The irradiation time of the reference light and the signal light applied to the optical information recording medium 1 can be adjusted by controlling the opening / closing time of the shutter in the pickup 11 via the shutter control circuit 87 by the controller 89.

The cure optical system 13 plays a role of generating a light beam used for pre-cure and post-cure of the optical information recording medium 1. Precure is a pre-process for irradiating a predetermined light beam in advance before irradiating the desired position with reference light and signal light when recording information at a desired position in the optical information recording medium 1. Post-cure is a post-process for irradiating a predetermined light beam after recording information at a desired position in the optical information recording medium 1 so that additional recording cannot be performed at the desired position.

The disk rotation angle detection optical system 14 is used to detect the rotation angle of the optical information recording medium 1. When adjusting the optical information recording medium 1 to a predetermined rotation angle, a signal corresponding to the rotation angle is detected by the disk rotation angle detection optical system 14, and a disk rotation motor control circuit is detected by the controller 89 using the detected signal. The rotation angle of the optical information recording medium 1 can be controlled via 88.

A predetermined light source driving current is supplied from the light source driving circuit 82 to the light sources in the pickup 11, the cure optical system 13, and the disk rotation angle detection optical system 14, and each light source emits a light beam with a predetermined light amount. Can do.

Further, the pickup 11 and the cure optical system 13 are provided with a mechanism capable of sliding the position in the radial direction of the optical information recording medium 1, and the position is controlled via the access control circuit 81.

By the way, the recording technology using the principle of angle multiplexing of holography tends to have a very small tolerance for the deviation of the reference beam angle. Therefore, a mechanism for detecting the deviation amount of the reference beam angle is provided in the pickup 11, a servo control signal is generated by the servo signal generation circuit 83, and the deviation amount is corrected via the servo control circuit 84. By providing the servo mechanism for this in the optical information recording / reproducing apparatus 10, the reference beam angle is controlled with high accuracy.

The pickup 11, the cure optical system 13, and the disk rotation angle detection optical system 14 may be simplified by combining several optical system configurations or all optical system configurations into one.

FIG. 2 shows a recording principle in an example of a basic optical system configuration of the pickup 11 in the optical information recording / reproducing apparatus 10. A light beam emitted from an external resonator type wavelength tunable laser 301 as an example of a light source enters a shutter 303. When the shutter 303 is open, after the light beam passes through the shutter 303, the optical ratio of the p-polarized light and the s-polarized light becomes a desired ratio by the optical element 304 composed of, for example, a half-wave plate. After the polarization direction is controlled, the light enters a PBS (Polarization Beam Splitter) prism 305.

The light beam that has passed through the PBS prism 305 functions as signal light 306, and after the light beam diameter is expanded by the beam expander 308, the light beam passes through the phase mask 309, the relay lens 310, and the PBS prism 311 and passes through the spatial light modulator 312. Is incident on.

The signal light to which information is added by the spatial light modulator 312 reflects the PBS prism 311 and propagates through the relay lens 313 and the spatial filter 314. Thereafter, the signal light is condensed on the optical information recording medium 1 by the objective lens 315.

On the other hand, the light beam reflected from the PBS prism 305 functions as reference light 307 and is set to a predetermined polarization direction according to recording or reproduction by the polarization direction conversion element 316, and then passes through the mirror 317 and the mirror 318 to be galvano. Incident on the mirror 319. Since the angle of the galvanometer mirror 319 can be adjusted by the actuator 320, the incident angle of the reference light that enters the optical information recording medium 1 after passing through the lens 321 and the lens 322 can be set to a desired angle.

In this way, the signal light and the reference light are incident on the optical information recording medium 1 so as to overlap each other, whereby an interference fringe pattern is formed in the recording medium, and information is recorded by writing this pattern on the recording medium. To do. In addition, since the incident angle of the reference light incident on the optical information recording medium 1 can be changed by the galvanometer mirror 319, recording by angle multiplexing is possible.

Hereinafter, in holograms recorded in the same area with different reference beam angles, holograms corresponding to each reference beam angle are called pages, and a set of pages angle-multiplexed in the same area is called a book. .

FIG. 3 shows a reproduction principle in an example of a basic optical system configuration of the pickup 11 in the optical information recording / reproducing apparatus 10. When reproducing the recorded information, the reference light is incident on the optical information recording medium 1 as described above, and the light beam transmitted through the optical information recording medium 1 is reflected by the galvanometer mirror 324 whose angle can be adjusted by the actuator 323. By doing so, the reproduction reference light is generated.

The reproduction light reproduced by the reproduction reference light propagates through the objective lens 315, the relay lens 313, and the spatial filter 314. Thereafter, the reproduction light passes through the PBS prism 311 and enters the photodetector 325, and the recorded signal can be reproduced. As the photodetector 325, for example, an image sensor such as a CMOS image sensor or a CCD image sensor can be used. However, any element may be used as long as page data can be reproduced.

4A, 4B, and 4C show the operation flow of recording and reproduction in the optical information recording / reproducing apparatus 10. FIG. Here, a flow relating to recording / reproduction using holography in particular will be described.

In this embodiment, the state of the information recording medium, that is, unrecorded or to what extent is recorded is determined by combining the following recording and reproducing operation flows. Therefore, first, the determination flow of the information recording medium according to the present embodiment, and the recording and reproduction operation flow of a predetermined address related to the determination of the information recording medium will be described.

FIG. 4A shows an operation flow for discriminating the information recording medium after the optical information recording medium 1 is inserted into the optical information recording / reproducing apparatus 10 until preparation for recording or reproduction is completed, and FIG. 4B shows the optical information from the ready state. FIG. 4C shows an operation flow until information is recorded on the recording medium 1 and FIG. 4C shows an operation flow until the information recorded on the optical information recording medium 1 is reproduced from the ready state.

As shown in FIG. 4A, when a medium is inserted, the optical information recording / reproducing apparatus 10 discriminates whether or not the inserted medium is a medium for recording or reproducing digital information using holography (501). . As a result of disc discrimination, when it is determined that the optical information recording medium records or reproduces digital information using holography, the optical information recording / reproducing apparatus 10 reads the medium identification information provided on the optical information recording medium ( 502), for example, information on an optical information recording medium and information on various setting conditions at the time of recording and reproduction, for example.

After the medium identification information is read, various adjustments according to the medium identification information and learning processing (503) related to the pickup 11 are performed, and then recording determination processing for determining a recordable area is performed (504). Although details of the recording determination process will be described later, this recording determination process reports the next recordable address of the medium inserted by the recording determination based on the additional recording information described later. Thus, the optical information recording / reproducing apparatus 10 is ready for recording or reproduction (505).

As shown in FIG. 4B, the operation flow from the ready state to recording information is as follows. First, data to be recorded is received (511), and information corresponding to the data is sent to the spatial light modulator 312 in the pickup 11. Send it in. Thereafter, various recording learning processes such as optimization of the power of the light source 301 and optimization of exposure time by the shutter 303 are performed in advance so that high-quality information can be recorded on the optical information recording medium (512). ). Thereafter, in the seek operation (513), the access control circuit 81 is controlled to position the pickup 11 and the cure optical system 13 at predetermined positions on the optical information recording medium. Thereafter, a predetermined region is pre-cured using the light beam emitted from the cure optical system 13 (514), and data is recorded using the reference light and signal light emitted from the pickup 11 (515). After recording the data, post cure is performed using the light beam emitted from the cure optical system 13 (516). Data may be verified as necessary.

As shown in FIG. 4C, the operation flow from the ready state to reproduction of recorded information is as follows. First, in the seek operation (521), the access control circuit 81 is controlled, and the pickup 11 and the reproduction reference light optical system. The position of 12 is positioned at a predetermined position of the optical information recording medium. Thereafter, reference light is emitted from the pickup 11, information recorded on the optical information recording medium is read (522), and reproduction data is transmitted (523).

5A and 5B show a data processing flow during recording and reproduction. In the present embodiment, the recording and reproducing processes are also performed in the information recording medium discrimination process. In the determination process, additional information necessary for recording determination is recorded and reproduced, and in accordance with the acquired additional information, it is determined whether it was recorded immediately before or made by previous recording. Get the last address specified for recording. FIG. 5A shows a recording data processing flow in the signal generation circuit 86 after the recording data reception 511 in the input / output control circuit 90 until conversion into two-dimensional data on the spatial light modulator 312. FIG. The flow of reproduction data processing in the signal processing circuit 85 up to reproduction data transmission 523 in the input / output control circuit 90 after two-dimensional data is detected by the detector 325 is shown.

Data processing during recording will be described with reference to FIG. 5A. First, the optical information recording / reproducing apparatus generates user data to be recorded on the optical information recording medium (801). Further, additional information for determining whether or not the user data is obtained by the recording data processing is generated (802). As additional information, the final recording address determined at the start of recording, the date and time when recording of information is started, the ID of the optical information recording / reproducing apparatus, and the information recording medium on which the optical information recording / reproducing apparatus records information It is generated by combining the total number of times of executing the recording process. These utilization methods will be described later.

The generated user data and additional information are combined as a data string, and record determination information is generated (803). In addition, by adding additional information to the user data area in each error correction block, individual modulation and demodulation processing is not required, and it can be realized only by combining data strings, and can be processed by a conventional processing procedure. Therefore, it does not affect the circuit scale. Data string is divided into a plurality of data strings, and each data string is converted to CRC (804) so that error detection at the time of reproduction can be performed. After performing scramble (805) for adding a pseudo-random data sequence to the error code, error correction coding (806) such as Reed-Solomon code is performed so that error correction during reproduction can be performed. Next, this data string is converted into M × N two-dimensional data, and the two-dimensional data (807) for one page is configured by repeating this data for one page data. A marker serving as a reference for image position detection and image distortion correction during reproduction is added to the two-dimensional data configured as described above (808), and the data is transferred to the spatial light modulator 312 (809).

Next, the data processing flow during reproduction will be described with reference to FIG. 5B. Image data detected by the photodetector 325 is transferred to the signal processing circuit 85 (811). Image position is detected based on the marker included in the image data (812), distortion such as image tilt, magnification, and distortion is corrected (813), and then binarization processing (814) is performed to remove the marker. By doing (815), two-dimensional data for one page is acquired (816). After converting the two-dimensional data obtained in this way into a plurality of data strings, error correction processing (817) is performed to remove the parity data strings. Next, descrambling processing (818) is performed, CRC error detection processing (819) is performed and CRC parity is deleted, and then the reproduction information is divided into user data generated at the time of recording and additional information (820). The additional information is acquired (821).

FIG. 6 is a block diagram of the signal generation circuit 86 of the optical information recording / reproducing apparatus 10. In FIG. 6, when the input of user data is started to the input / output control circuit 90, the input / output control circuit 90 notifies the controller 89 that the input of user data is started. In response to this notification, the controller 89 instructs the signal generation circuit 86 to record data for one page input from the input / output control circuit 90. A processing command from the controller 89 is notified to the sub-controller 601 in the signal generation circuit 86 via the control line 608. Upon receiving this notification, the sub-controller 601 controls each signal processing circuit via the control line 608 so that each signal processing circuit operates in parallel. First, the memory control circuit 603 is controlled to store user data input from the input / output control circuit 90 via the data line 609 in the memory 602. Information relating to recording is received from the controller 89 and stored in the memory 602 via the memory control circuit 603. When the amount of user data and information related to recording stored in the memory 602 reaches a certain amount, the CRC calculation circuit 604 performs control to convert the user data into CRC. Next, the CRC-converted data is scrambled by adding a pseudo-random data sequence by the scramble circuit 605, and the error correction encoding circuit 606 performs error correction encoding by adding the parity data sequence. Finally, the pickup interface circuit 607 reads out the error correction encoded data from the memory 602 in the arrangement order of the two-dimensional data on the spatial light modulator 312 and adds a reference marker at the time of reproduction. The two-dimensional data is transferred to the spatial light modulator 312.

FIG. 7 is a block diagram of the signal processing circuit 85 of the optical information recording / reproducing apparatus 10. In FIG. 7, when the photodetector 325 in the pickup 11 detects image data, the controller 89 instructs the signal processing circuit 85 to reproduce the data for one page input from the pickup 11. A processing command from the controller 89 is notified to the sub-controller 701 in the signal processing circuit 85 via the control line 711. Upon receiving this notification, the sub-controller 701 controls each signal processing circuit via the control line 711 so that the signal processing circuits are operated in parallel. First, the memory control circuit 703 is controlled to store the image data input from the pickup 11 via the pickup interface circuit 710 via the data line 712 in the memory 702. When the data stored in the memory 702 reaches a certain amount, the image position detection circuit 709 performs control to detect a marker from the image data stored in the memory 702 and extract an effective data range. Next, the image distortion correction circuit 708 performs distortion correction such as image inclination, magnification, and distortion using the detected marker, and controls to convert the image data into the expected two-dimensional data size. Each bit data of a plurality of bits constituting the size-converted two-dimensional data is binarized by the binarization circuit 707 to determine “0” or “1”, and the data is arranged on the memory 702 in the order of the output of the reproduction data. Control to store. Next, the error correction circuit 706 corrects an error included in each data string, and the scramble release circuit 705 cancels the scramble to add the pseudo random number data string, and then the CRC calculation circuit 704 detects an error in the user data on the memory 702. Check not included. Thereafter, user data and information related to recording are separated, and information related to recording is determined by information read by the recording determination circuit 713. Then, user data is transferred from the memory 702 to the input / output control circuit 90.

FIG. 8 shows an example of the file to be recorded on the information recording medium, the file size, and the final address at the time of recording. In FIG. 8, when File001 to File005 are recorded at a time on the information recording medium, 11CE1EFFh, which is the final address of File005, is recorded as user data additional information of each file.

Subsequently, FIG. 9 is an example when the recording final address is updated. The recording final address from File001 to File004 is 11CE1EFFh as in FIG. However, along with the recording of File005, the recording final address is updated to 11CE1FFFh. This is updated if any recording error occurs. For example, when a predetermined recording quality is not obtained in the optical information recording / reproducing apparatus or when an error occurs due to a defect on the information recording medium, the reproduction error rate exceeds a predetermined threshold value and is set to another address. This situation occurs when re-recording.

Next, FIG. 10 is also an example when the recording final address is updated. In FIG. 10, recording up to File 005 is registered at the start of recording, but File 101 is added thereafter. In this case as well, the final recording address is updated. As described above, accurate information is determined for the final recording address when recording is finally completed. In addition to the original information recording size, in order to eliminate the complexity of management due to frequent updating of the final address and to secure a certain physical interval from the area where information is added, a reserve block is added. A plurality may be secured and information near the end may be filled with zero data. By this method, the search for the recording end address can be simplified. For example, when there is a defect near the recording end address and recording with an appropriate quality cannot be performed, the recording can be completed without sequentially changing the registration of the recording end address.

Hereinafter, this embodiment will be described in detail with reference to FIG. FIG. 11 is a flowchart showing recording determination of the information recording medium in the present embodiment. An optical information recording medium using a hologram recording material is unnecessarily exposed to light when recording / reproducing light is irradiated to an unrecorded area, resulting in deterioration of recording quality. On the other hand, after sufficient light irradiation, it can be said that the deterioration of the recording quality due to light exposure is limited. Therefore, first, the start address is accessed (101), and in order to confirm the recording state of the user data area, first, the start address is recorded (102). Recording is realized by the operation flow shown in FIG. 4B and the data processing flow shown in FIG. 5A. Subsequently, reproduction (103) is performed at the address, and recording determination (104) is performed based on the acquired additional information. Reproduction is realized by the operation flow shown in FIG. 4C and the data processing flow shown in FIG. 5B, and recording determination is performed by collating additional information added at the time of recording.

* Recording judgment is made by the following three conditional branches. The first conditional branch is a case where the address has not been recorded before recording at 102, and recording is performed at the address by the recording process of 102. It can be determined that the recording was performed immediately before. FIG. 12 is an example of additional information. To confirm that it is the previous recording, check the stored time stamp (date and time) against the current time, and if it matches the date and time of the previous recording, It can be determined that there is. Alternatively, the combination of the recording / reproducing apparatus ID and the number of times of recording of the apparatus can also be determined that the area has been recorded immediately before when the recording / reproducing apparatus ID and the number of times of recording coincide with the information of the immediately preceding recording.

Subsequently, the second conditional branch is a case where the address has been recorded and matches. In this case, the recording final address of the additional information stored at the address is extracted. Then, it moves to the final recording address extracted from the additional information (105). Then, reproduction processing (106) is performed on the address after the movement, and additional information of the address is extracted. In this case, since the final address is determined, collation (107) is performed with the recorded final address described in the read additional information. In the final address determination (108), when the recording final address recorded at the address matches the address, it is determined that the recording flow to the address is recorded with the address as the recording final address. On the other hand, if the recording end address described in the additional information of the address does not match the address, it means that the recording area is further expanded at the time of recording, and the recording final address stored in the additional information of the address Move (105) and perform re-determination.

After determining the final recording address, it is necessary to determine whether the next address is unrecorded. Depending on the recording format of the disc, it is assumed that data is additionally recorded after the final recording address as in the additionally recorded information recording medium shown in FIG. 102) and playback (103). As a result, the recording determination (104) is performed in the same manner as in the first conditional branch, and if it is determined that the area is an unrecorded area, the process ends.

The third conditional branch is when the playback result cannot be acquired correctly. In this case, the recording at the address is not properly performed. The recording is moved to the next address (110), the counter is incremented by +1 (111), and the recording is performed again from the recording (102). However, if the counter exceeds a predetermined value, for example, 20 here (113), proper recording cannot be performed due to factors such as the recording / reproducing apparatus factor or the information recording medium factor, so that the information recording medium is determined to be a non-recordable disc. The process is terminated. However, in order to separate the factors, the recording determination may be performed again using a different recording / reproducing apparatus. In this embodiment, the upper limit of the counter value is 20 in consideration of shortening the time required for recording recording of the medium. However, a time limit by a timer may be provided, and the processing time is not taken into consideration. You may implement to the last address.

As described above, this embodiment is a method for determining the amount of recorded information in an optical information recording / reproducing apparatus that records and reproduces information on an information recording medium, and generates record determination information by combining user data and additional information. Recording determination information is recorded in advance based on the step of recording the recording determination information on the information recording medium, the step of reproducing the recording determination information recorded on the information recording medium, and the additional information of the reproduced recording determination information. It is set as the structure which has the step which determines whether it was done.

An optical information recording / reproducing apparatus for recording / reproducing information on / from an information recording medium, comprising: record determination information generating means for generating record determination information by combining user data and additional information; and record determination information on the information recording medium. Recording means for recording the information, reproducing means for reproducing the recording judgment information recorded on the information recording medium, and judging means for judging whether or not the recording judgment information has been recorded in advance based on the additional information of the reproduced recording judgment information It is set as the structure which has.

In addition, the information recording medium, the additional information is added to the user data divided into a predetermined data size, data having a data amount that fits in the error correction block size is recorded, the additional information, The final recording address determined at the start of recording, the date and time when recording is started, the ID of the optical information recording / reproducing apparatus recorded on the information recording medium, and the optical information recording / reproducing apparatus performs recording processing on the information recording medium It is a combination of any one of the total number of times performed.

Therefore, according to the present embodiment, it is possible to efficiently determine the recording area without performing the reproduction that is an access to the unrecorded area with respect to the hologram medium, and the amount of information recorded on the hologram medium can be efficiently determined. Can be acquired.

Next, a second embodiment will be described with reference to FIG. FIG. 13A shows data processing during recording. Since the basic data processing is the same as in FIG. 5A, only the differences are shown. In FIG. 5A, user data to be recorded data is generated and recorded internally as test data. In this embodiment, user data (1301) received from the external controller 91 via the input / output control circuit 90 is recorded. ), Additional information (802) is generated and combined to generate recording information (803).

FIG. 13B shows data processing during reproduction. FIG. 13B is the same as FIG. 5B. After the recording information is divided into user data and additional information (820), user data is transmitted (1302) via the input / output control circuit 90 and added. Information is acquired (821).

According to the present embodiment, since useful user data is recorded without adding unnecessary test data, the use efficiency of the information recording medium is high, and further, there is no need to discard after confirmation.

FIG. 14 shows a method of combining additional information with user data. As shown in FIGS. 13A and 13B, user data is divided into a predetermined data size when it is recorded in the optical information recording / reproducing apparatus. Then, additional information is added to each data, and the data amount is configured to fit within the error correction block size. Then, the processing after CRC addition (804) in FIG. 13A and the processing up to error detection (819) in FIG. 13B are performed for each block.

The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

In addition, each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files that realize each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

Also, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 1 ... Optical information recording medium, 10 ... Optical information recording / reproducing apparatus, 11 ... Pickup,
12 ... Reference light optical system for reproduction, 13 ... Cure optical system,
14 ... Optical system for detecting disk rotation angle, 81 ... Access control circuit,
82: Light source drive circuit, 83: Servo signal generation circuit,
84 ... Servo control circuit, 85 ... Signal processing circuit, 86 ... Signal generation circuit,
87 ... Shutter control circuit, 88 ... Disc rotation motor control circuit,
89 ... Controller, 90 ... Input / output control circuit, 91 ... External control device,
301: Light source, 303: Shutter, 306: Signal light, 307: Reference light,
308 ... Beam expander, 309 ... Phase mask,
310, 313 ... relay lens, 311 ... PBS prism,
312 ... Spatial light modulator, 314 ... Spatial filter, 315 ... Objective lens,
316: Polarization direction conversion element, 319, 324 ... Galvano mirror,
320, 323 ... Actuator, 321, 322 ... Lens, 325 ... Photodetector

Claims (10)

A method for determining the amount of recorded information in an optical information recording / reproducing apparatus for recording / reproducing information on / from an information recording medium,
Combining user data and additional information to generate record determination information;
Recording the recording determination information on the information recording medium;
Replaying the recording determination information recorded on the information recording medium;
A method for determining a recording information amount, comprising: determining whether the recording determination information has been recorded in advance based on the additional information of the reproduced recording determination information. The method for determining the amount of recorded information according to claim 1,
The information recording medium is a hologram medium;
The optical information recording / reproducing apparatus is an apparatus for recording information on the information recording medium using holography, and determining a recorded information amount. The method for determining the amount of recorded information according to claim 1,
The additional information includes a recording final address determined at the start of recording, a date and time at which recording is started, an ID of the optical information recording / reproducing device, and a total number of times the optical information recording / reproducing device has performed recording processing, A method for determining the amount of recorded information, which is a combination of any of the above. The method for determining the amount of recorded information according to claim 1,
The method for determining a recording information amount, wherein the additional information is stored in each error correction block. An optical information recording / reproducing apparatus for recording / reproducing information on / from an information recording medium,
A record determination information generating unit that combines the user data and the additional information to generate the record determination information;
Recording means for recording the recording determination information on the information recording medium;
Reproducing means for reproducing the recording determination information recorded on the information recording medium;
An optical information recording / reproducing apparatus comprising: determining means for determining whether or not the recording determination information has been recorded in advance based on the additional information of the reproduced recording determination information. The optical information recording / reproducing apparatus according to claim 5,
The information recording medium is a hologram medium;
The optical information recording / reproducing apparatus is an apparatus for recording information on the information recording medium using holography. The optical information recording / reproducing apparatus according to claim 5,
The additional information includes a recording final address determined at the start of recording, a date and time at which recording is started, an ID of the optical information recording / reproducing device, and a total number of times the optical information recording / reproducing device has performed recording processing, An optical information recording / reproducing apparatus characterized by being a combination of any of the above. The optical information recording / reproducing apparatus according to claim 5,
The optical information recording / reproducing apparatus, wherein the additional information is stored in each error correction block. An information recording medium,
Additional information is added to user data divided into a predetermined data size, and data composed of a data amount that fits in the error correction block size is recorded,
The additional information includes the final recording address determined at the start of recording, the date and time when recording is started, the ID of the optical information recording / reproducing device recorded on the information recording medium, and the optical information recording on the information recording medium. An information recording medium characterized by any combination of the total number of times that the reproducing apparatus has performed the recording process. An information recording medium according to claim 9, wherein
The information recording medium is a hologram medium.

Images