WO2014091530A1

WO2014091530A1 - Information recording/reproducing device and recording method

Info

Publication number: WO2014091530A1
Application number: PCT/JP2012/081872
Authority: WO
Inventors: 裕美西浦; 石飛　竜哉
Original assignee: 日立コンシューマエレクトロニクス株式会社
Priority date: 2012-12-10
Filing date: 2012-12-10
Publication date: 2014-06-19

Abstract

The objective of the present invention is to provide an information recording/reproducing device capable of reproduction from a holographic recording medium by means of a simple procedure. The information recording/reproducing device for an optical information recording medium has: a drive unit that executes data recording to the optical information recording medium; and a control unit that controls the recording/reproducing of the drive unit. The control unit splits recording source data into recording units stipulated by a recording medium specification or a drive specification, extracts the split recording source data, groups by recording group units, transmits data to the drive unit in the grouped recording group units, and instructs recording.

Description

Information recording / reproducing apparatus and recording method

The present invention relates to a hologram drive device that records and reproduces information from a recording medium using holography.

As one of the technologies for increasing the capacity of storage, an interference fringe pattern generated when signal light having page data information two-dimensionally modulated by a spatial light modulator is superimposed on reference light inside a recording medium. Therefore, a hologram recording / reproducing technique for recording information on a recording medium by causing refractive index modulation in the recording medium has been devised.

As a hologram recording technique, for example, there is WO06 / 123733 (Patent Document 1). In this publication, “the recording method of the present invention is a method of recording interference fringes formed by information light carrying information and reference light on a recording medium having a hologram recording layer for recording interference fringes. , Dividing a series of information to be recorded into a plurality of page data having a capacity capable of carrying the information light, and obtaining arrangement conversion information capable of specifying a position where an interference fringe corresponding to each page data is recorded on a recording medium. In the recording method, the arrangement conversion information is a correspondence between the arrangement of the page data and the arrangement of interference fringes on the recording medium. Alternatively, it may be a conversion method for calculating the arrangement of interference fringes on the recording medium from the arrangement of the page data. In addition, the reproducing method of the present invention includes a hologram recording layer on which interference fringes formed by information light carrying information and reference light are recorded. A method for reproducing information from a recording medium having a plurality of interference fringes recorded on the recording medium by dividing a series of information into page data having a capacity that can be carried by information light. Is reproduced in an order different from the order in which the interference fringes are recorded. "

WO06 / 123733

Incidentally, in hologram recording, there is a limit to the amount of data that can be recorded in one recording depending on the performance of the drive or the characteristics of the optical information recording medium. For example, when data is recorded on a hologram recording medium, there are cases where processes such as pre-cure and post-cure are required. In this case, due to the characteristics of the hologram recording medium or the like, it is necessary to start recording within a certain period after performing pre-curing, and it is necessary to perform post-curing after a certain period of time has elapsed after recording is completed. In such a case, there is a limit to the amount of data that can be recorded by one recording.

However, since the recording method described in Patent Document 1 does not consider the above limitation, there is a possibility that the reproduction process may be complicated due to the above limitation.

Therefore, an object of the present invention is to provide an information recording / reproducing apparatus that enables reproduction from a hologram recording medium by a simple procedure.

The above problem is solved by the invention described in the claims, for example.

According to the present invention, it is possible to provide an information recording / reproducing apparatus capable of reproducing from a hologram recording medium by a simple procedure.

Schematic diagram of recording source data Schematic diagram of data in a recording group Schematic diagram of recorded data Schematic diagram of recorded data Schematic diagram of information recording / reproducing device Schematic diagram of recording source data Schematic diagram of data on optical information recording medium Schematic diagram of data on optical information recording medium Schematic diagram of data on optical information recording medium Schematic diagram of recording source data Schematic diagram of data on optical information recording medium Schematic diagram of data in a recording group Schematic diagram of data in a recording group Schematic diagram of recorded data Schematic diagram of recorded data Recording processing sequence Recording processing sequence Schematic diagram of recording order and recording position information Recording processing sequence Recording image on disc Schematic diagram of recording order of recording units Schematic diagram of recording source data Schematic diagram of data on optical information recording medium Schematic diagram of data playback order Schematic diagram of recording source data Schematic diagram of data on optical information recording medium Schematic diagram of data recording order Schematic diagram of data recording order Schematic diagram of recording source data Schematic diagram of data on optical information recording medium Schematic diagram of extracted data Schematic diagram of data recording order Block diagram showing recording / playback apparatus (drive unit)

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

FIG. 15 is a block diagram showing an optical information recording medium recording / reproducing apparatus for recording and / or reproducing digital information using holography.

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. The optical information recording medium 1 is a rotation motor. 50 can be rotated.

The pickup 11 plays a role of irradiating the optical information recording medium 1 with reference light and signal light 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 disc 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. It is necessary to provide a servo mechanism for this purpose in the optical information recording / reproducing apparatus 10.

Further, 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.

3A to 3C show an example in which the recording source data shown in FIG. 3A is recorded on an optical information recording medium. FIG. 3A shows recording source data, which is divided into recording units (A to L) when data recording is recorded on the optical information recording medium. FIG. 3B shows a state where the data A to L shown in FIG. 3A are recorded on the optical information recording medium. Twelve squares (FIG. 3 (b) 301) describing A to L shown in FIG. 3 (b) are recording units when data is recorded on the optical information recording medium, and are called pages. Of course, it may be a book that is an aggregate of a plurality of pages. This may be data recorded in one area or a collection of data.

Also, the concentric circles in FIGS. 1 to 3 are referred to as a track. A, D, G, J are used for the track 1, B, E, H, K are used for the track 2, and C, F, I are used for the track 3. , L pages are recorded. Each page is recorded in groups. FIG. 3B shows an example in which three pages connected on the same rotation angle of the optical information recording medium are set as one recording group. The first recording group (FIG. 3 (b) 302) is A, B, C, the second recording group is C, D, E, the third recording group is G, H, I, and the fourth recording group is Each group consists of three pages, such as J, K, and L. Here, this recording group is a unit for curing. That is, the area where one pre-curing and post-curing is performed on one or a plurality of recording unit areas is an area where one recording group is recorded. For example, one curing process is performed on the area of the first recording group. Here, a unit for performing a single curing process is a unit of a curing process performed in one recording session, and not only when curing is completed with one light source irradiation for a recording group, This includes a case where the spot size is small and curing is completed by multiple light source irradiations while moving the position with respect to the recording group. In the present invention, the present invention is not limited to the case where the recording group is a unit for curing, but includes cases where the recording group is limited for other reasons.

The recording order of each recording group is the order of recording group 1, recording group 2, recording group 3, and recording group 4. The recording order of pages in the recording group is the order of track 1, track 2, and track 3. Data is recorded as shown in FIG. 3B by sequentially recording the recording source data of FIG. 3A according to such a recording order.

FIG. 3C shows a state in which the recording source data shown in FIG. 3A is recorded on the optical information recording medium, as in FIG. 3B, but the page recording order in the recording group is shown in FIG. Unlike b), this is an example in which the recording order is track 1, track 3, and track 2. It can be seen that, by changing the recording order within the recording group, the same recording source data is recorded, but the arrangement of the data recorded on the optical information recording medium is different from that in FIG. The number of pages in the recording group and the recording order of the pages in the recording group are determined by the specifications of the information recording / reproducing apparatus and / or the specifications of the optical information recording medium. Regardless of the number of pages or the page recording order in the recording group, it is possible to unify the intended data arrangement.

Hereinafter, when the data arrangement on the optical information recording medium shown in FIG. 4 is the target data arrangement, by applying the data processing according to the present embodiment shown in FIGS. 1A to 1D, It shows that the data arrangement on the optical information recording medium is unified regardless of the recording order in the recording group.

The data shown in FIG. 1A represents a state in which the recording source data is divided into recording units. Here, the purpose is to record the divided data from A to L so as to have the data arrangement shown in FIG. For example, pages indicated by A, B, C, and D on track 1, E, F, G, and H on track 2, and pages indicated by I, J, K, and L on track 3 are arranged.

4 Group three pages that are on the same rotation angle of the optical information recording medium of FIG. 4 as one recording group. Data divided from A to L shown in FIG. 1A is extracted and divided into four recording groups 101 to 104 shown in FIG.

When the recording position order in these recording groups is the order of track 1, track 2, and track 3, the data A, E, and I in the recording group 101 shown in FIG. If recording is performed in the data order of A, E, and I as shown in FIG. 4, on the optical information recording medium, as shown in FIG. 4, in the recording group 1 (401), A, Data can be arranged in the order of E and I.

If the order of recording positions in the recording group is the order of track 1, track 3, and track 2, the data A, E, and I in the recording group 101 shown in FIG. If recording is performed in the data order of A, I, E as shown in d), A, E in the direction of track 1 to track 3 in recording group 1 (401) as shown in FIG. 4 on the optical information recording medium. , I can be arranged in the order of I.

In this way, if the data processing of the recording source data is divided, grouped, and ordered based on the recording unit, the recording order, and the recording position of the data on the optical information recording medium and recorded, Regardless of the recording order, the data arrangement on the optical information recording medium can be made the same.

Further, as shown in FIG. 4, since the recording units A to D, E to H, and I to L are respectively located on the same track, the reproduction can be performed along the track, and the reproduction becomes simple. Further, as shown in FIG. 4, even when input recording source data extends over a plurality of recording groups, a flexible reproduction order is realized by rearranging the recording source data across a plurality of recording groups. It becomes possible.

2 shows a procedure for recording the recording source data shown in FIG. 1A so as to have the recording data arrangement shown in FIG. 4 using the information recording / reproducing apparatus shown in FIG. In the data arrangement in FIG. 4, data is continuously arranged in the circumferential direction on the same track, and after arranging data for one round, the data is continuously arranged in the circumferential direction on the same outer track. Is to be placed. However, the data arrangement format is not limited to this.

FIG. 2 is a block diagram showing an information recording / reproducing apparatus using holography. The information recording / reproducing apparatus 201 includes a control unit 202 and a drive unit 203 and is connected to an external network 210 and / or an external memory 211. The external memory may be anything as long as it can hold information, such as an HDD, SSD (Solid State Drive), or an optical information recording medium. Here, for example, the drive unit 203 is the optical information recording / reproducing apparatus 10 described with reference to FIG.

The control unit 202 divides and extracts data from the external network 210 and / or the external memory 211. Specifically, the control unit 202 divides the recording source data into recording units as shown in FIG. In this embodiment, the divided data are arranged in pages A, B, C, D on track 1 in FIG. 4, pages E, F, G, H on track 2, and pages I, J, K, L on track 3, Another object of the present invention is to arrange three pages that are connected at the same rotation angle as one recording group. Therefore, the control unit 202 extracts A, E, and I from the recording source data in FIG. 1A into the recording group 1 as shown in FIG. Similarly, for the other recording groups, the control unit 202 extracts B, F, and J, groups them into the recording group 2 shown in FIG. Are grouped into the recording group 3, and D, H, and L are extracted and grouped into the recording group 4 shown in FIG.

At the time of grouping, the control unit 202 duplicates the entity of the recording source data to the auxiliary memory or the like, and the position of the recording source data such as the recording source data address without duplicating the recording source data. Any format is acceptable, such as a method of holding information and grouping.

In this embodiment, it is assumed that the recording position order in the group is the order of track 1, track 2, and track 3, and the control unit 202 and the drive unit 203 hold this recording position order information.

The procedure for the control unit 202 to transmit the recording data to the drive unit 203 will be described. The control unit 202 transmits the data A, E, and I grouped in the recording group 1 to the drive unit 203 in the order of A, E, and I shown in FIG.

The recording procedure in the drive unit 203 will be described. The drive unit 203 records data received in the order of data A, E, and I in the order of track 1, track 2, and track 3 in the order of the recording position. As a result, as shown in FIG. 4, in the recording group 1 (401), data is arranged in the order of A, E, and I from the track 1 to the track 3.

The control unit 202 may send the A, E, and I data to the drive unit 203 in a single unit, send the A data to the drive unit 203, then E data, and finally I data. May be transmitted for each recording unit. In either case, the drive unit 203 can arrange data as shown in FIG. 4 by performing recording in the order of recording positions of track 1, track 2, and track 3.

The same applies to other recording groups. When the position of the recording group 1 (401) is set to the rotation reference position of the information recording medium and the angle is 0 degree, the control unit 202 determines the order of B, F, J in the recording group 2 above the rotation angle of 90 degrees, and the rotation angle. The data received by the drive unit 203 is transmitted to the drive unit 203 in the order of C, G, K in the recording group 3 above 180 degrees, and in the order of D, H, L in the recording group 4 above the rotation angle 270 degrees. Data is recorded in the order of the positions of track 1, track 2, and track 3, and A, B, C, D on track 1, E, F, G, H, track 3 on track 2, as shown in FIG. Data can be recorded in an arrangement of I, J, K, and L above.

In addition to the recording data, the recording position information of the recording data may be transmitted from the control unit 202 to the drive unit 203. For example, the control unit 202 transmits to the drive unit 203 recording position information that A is recorded on track 1, E is recorded on track 2, and I is recorded on track 3. At this time, the drive unit 203 refers to the recording position order and the received recording position information, records A on track 1, records E on track 2, and finally records I on track 3. In this case, since the drive unit 203 cannot perform recording in the order of received data, a large-capacity memory is required to hold recording data. Since it may be difficult to mount a large-capacity memory in the drive unit 203, it is desirable that the control unit 202 prepare recording data in advance in the order of recording positions recorded by the drive unit 203 as in this embodiment.

2 shows a procedure for recording the recording source data shown in FIG. 1A so as to have the recording data arrangement shown in FIG. 4 using the information recording / reproducing apparatus shown in FIG. In this embodiment, the case where the recording position order in the recording group is the order of track 1, track 3, and track 2 is shown.

1A is the same as that described in the first embodiment from the recording source data to the process of grouping into recording groups shown in FIG.

The procedure for the control unit 202 to transmit the recording data to the drive unit 203 will be described.

The control unit 202 determines rule information including the recording order and recording position of the recording unit data. In this embodiment, the rule information is information that the recording position order in the group is recorded in the order of track 1, track 3, and track 2. Further, the control unit 202 notifies the determined rule information to the drive unit 203.

The control unit 202 transmits the data of A, E, and I of the recording group 1 to the drive unit 203 in the order of A, I, and E as shown in FIG. In transmission to the drive unit 203, a plurality of recording units may be collected, or may be transmitted for each recording unit.

The drive unit 203 records data received in the order of A, I, and E in the order of track 1, track 3, and track 2 in accordance with the rule information. As a result, as shown in FIG. 4, in the recording group 1 (401), data is arranged in the order of A, E, and I in the direction from the track 1 to the track 3.

The same applies to the other recording groups, and the control unit 202 performs the order of B, J, and F in the recording group 2 at a rotation angle of 90 degrees, and the order of C, K, and G in the recording group 3 at a rotation angle of 180 degrees. In the recording group 4 with a rotation angle of 270 degrees, the data is transmitted to the drive unit 203 in the order of D, L, and H, so that the drive unit 203 records the data in the order of the received data in the order of track 1, track 2, and track 3. As shown in FIG. 4, data is recorded in an arrangement of A, B, C, D on track 1, E, F, G, H on track 2, and I, J, K, L on track 3. Can do.

Thus, even when the recording order is different, the data arrangement shown in FIG. 4 can be obtained on the optical information recording medium. That is, the data arrangement on the optical information recording medium can be the same regardless of the recording order within the recording group.

Even when the recording group size is variable, the rule information including the recording order and the recording position of the recording unit data is determined in the recording group in consideration of the data arrangement on the optical information recording medium. By performing the recording, the data arrangement on the optical information recording medium can be made the same regardless of the recording group size.

Processing related to recording control will be described with reference to FIG.

A procedure for recording the recording source data 801 using the information recording / reproducing apparatus shown in FIG. 2 according to the rule information including the recording order and the recording position order information so as to have the recording data arrangement shown in FIG. .

In this embodiment, the recording position order in the recording group is the order of track 1, track 3 and track 2, and the recording order of the recording group is the order of recording group 1, recording group 2, recording group 3 and recording group 4. In the case of recording with.

Recording order information 802 indicates the recording order of the recording source data. In this recording order, the recording order of the recording group is recorded in the order of recording group 1, recording group 2, recording group 3, recording group 4, and the recording order of the recording unit data in the recording group is track 1, track 3. The order of the tracks 2 is determined. The recording position information 804 is recording position information, and the recording position information includes track position information and rotation angle position information. The track position information indicates the offset of the transmission data from the reference track with the track 1 as the reference track. For example, since the recording group A is recorded on the track 1 which is the reference track, the offset is zero. I is offset 2 for recording on track 3, and E is offset 1 for recording on track 2. Regarding the rotation angle position information, for example, the recording group 1 is 0 degree, the recording group 2 is 90 degrees, the recording group 3 is 180 degrees, and the recording group 4 is 270 degrees.

Specific recording procedure using rule information including recording order and recording position information will be described.

The control unit 202 creates recording order information 802 and recording position information 804 of the recording unit data. The control unit 202 transmits the recording position information 804 to the drive unit 203, and sets rule information including the recording order and the recording position information. This rule indicates that recording is performed at the position indicated by the recording position information 804 in the order indicated by the recording position information 804. After the rule information is set, the same rule is used in the same recording group or in a predetermined unit or in the same disc.

The control unit 202 refers to the recording order described in the recording order information 802, creates transmission data 803 from the recording source data 801 so that the transmission data is arranged in the recording order described in the recording order information 802, and transmits the transmission data 803. Is transmitted to the drive unit 203.

The drive unit 203 records the received data (803) based on the received recording position information 804. In the case of the recording group 1, the received data A is recorded on the track 1 with the rotation angle 0 and the offset 0 from the reference track. Data I is recorded on track 3 with a rotation angle of 0 and an offset from the reference track of 2, and data E is recorded on track 2 with a rotation angle of 0 and an offset from the reference track of 1. Similarly, by recording with reference to the rotation angle and the offset from the reference track for other recording groups, the recording data is arranged as shown in FIG.

As described above, the control unit 202 considers the recording order and the data arrangement within the recording group, and the rules regarding the recording order and recording position information of the recording unit data so that the arrangement of the recording source data and the recording image data are the same. Create The control unit 202 creates data to be transmitted to the drive unit 203 based on this rule, and transmits the created rule to the drive unit 203. The drive unit 203 records the data according to this rule, so that the recording order and Even when the recording group sizes are different, the arrangement of the recording source data and the recording image data is the same.

In addition, by setting the rule determined by the control unit 202 in the drive unit 203, for example, even when the entire transmission data 804 is transmitted and a recording instruction is issued, the drive unit 203 can perform recording according to the recording position information.

2 shows a procedure for recording the recording source data shown in FIG. 5 (a) so as to have the recording data arrangement shown in FIG. 5 (b) by using the information recording / reproducing apparatus shown in FIG. In this embodiment, dummy data is recorded in addition to user data, but both user data and dummy data can be recorded in a target data arrangement.

* The pages at both ends of each track in the recording group are set as dummy pages, and the data recorded at this time is set as dummy data. However, the position of the dummy data is not limited to both ends, and may exist anywhere.

Fig. 5 (a) shows the recording source data. FIG. 5B shows an arrangement image of recording unit data on a target recording group on the recording medium. The pages at both ends are dummy pages. In the figure, it is described as D. User data extracted from the recording source data is recorded on the pages excluding the dummy pages at both ends. Data a1, a2, and a3 are arranged on track 1 of recording group 1. After a4, it is arranged on track 1 after recording group 2. The same applies to the other tracks, b1, b2, b3 on track 2 of recording group 1, c1, c2, c3 on track 3, d1, d2, d3 on track 4, e1, e2, e3 on track 5. The purpose is to place.

FIG. 6A shows user data included in the recording group 1 extracted from the recording source data shown in FIG. 5A and grouped. In FIG. 6C, data on the same track is recorded in order, and data in FIG. 6A is arranged in the order of transmission data on the assumption that recording is performed in the order of track 1 to track 5.

* To record track 1, record the leftmost dummy data of track 1. Next, user data a1, a2, and a3 are recorded. Finally, the rightmost dummy data is recorded. The same recording is performed for track 2 and later.

FIG. 7A shows a command sequence between the control unit 202 and the drive unit 203 during recording in the present embodiment.

The control unit 202 sets the rule information including the recording order and recording position order information of the recording unit data determined using the command 701 in the drive unit 203. This processing may be performed for each recording in units of recording groups, or may be performed once unless the rule information is changed. Thereafter, the control unit 202 performs data division and grouping of recording source data and creation of recording data.

Assuming that the control unit 202 grasps the layout of the dummy page shown in FIG. 5B, the control unit 202 determines whether or not the recording target page is a dummy page. In this embodiment, assuming that the page is a dummy page, the control unit 202 designates a recording address to the drive unit 203 using a command 702 and issues a dummy recording instruction. In the case of a dummy recording instruction, actual data is not transmitted. The recording address designated by the control unit 202 may be a logical address or a physical address. Receiving the dummy data recording instruction, the drive unit 203 records the generated or held dummy data at a specified position.

In step 703, the control unit 202 determines whether or not the next recording target page is a dummy page. In this embodiment, as a case of user data, the control unit 202 designates a recording address, transmits the user data to the drive unit 203, and issues a recording instruction using a recording instruction command. The drive unit 203 that has received the recording instruction and the user data records the received user data at a designated position.

Hereafter, the dummy recording instruction or the recording instruction is similarly performed.

Here, when instructing the drive unit 203 to record, if the data of the page to be instructed to be recorded next is user data according to the determined rule information, a plurality of user data can be collected and transmitted to the drive unit 203.

Thus, when the control unit 202 issues a dummy data recording instruction using the dummy data recording instruction command, it is not necessary to transmit the substance of the dummy data to the drive unit 203.

Further, since data is recorded so that continuous data (a1 to a3) are arranged on the same track as shown in FIG. 5B, reproduction becomes simple.

2 shows a procedure for recording the recording source data shown in FIG. 5 (a) so as to have the recording data arrangement shown in FIG. 5 (b) by using the information recording / reproducing apparatus shown in FIG. In this embodiment, user data and dummy data can be recorded in a target data arrangement.

Further, the user data and the dummy data are grouped together, the data to be transmitted to the drive unit is created, and the created data is transmitted, so that the process related to the determination process of whether or not the dummy page is present in the control unit 202 is unnecessary. To do.

Fig. 5 (a) shows the recording source data. FIG. 5B shows an arrangement image of recording unit data on a target recording group on the recording medium. The pages at both ends are dummy pages. In the figure, it is described as D. User data extracted from the recording source data is recorded on the pages excluding the dummy pages at both ends.

FIG. 6B is an example of data included in the recording group in the case where both dummy data and user data are transmitted to the drive unit 203, and the substance of dummy data on dummy pages at both ends of the recording group is also stored. To do.

In this embodiment, data on the same track is sequentially recorded in the circumferential direction. FIG. 6D shows transmission data including dummy data. When transmission data including dummy data is determined, the same recording instruction command can be used without distinguishing between dummy data and user data.

FIG. 7B shows a command sequence between the control unit 202 and the drive unit 203 during recording.

The control unit 202 sets the rule information including the recording order and the recording position order of the recording unit data determined using the command 701 in the drive unit 203. This setting may be performed for each recording in units of recording groups, or may be performed once unless the rule information is changed. Thereafter, the control unit 202 performs data division and grouping of the recording source data and creation of transmission data.

The control unit 202 uses the command 703 to specify a recording address and instruct to record data created by extracting data to be transmitted to the drive unit 203 based on the rule information. The drive unit 203 records the received data at the designated position in the order of the set recording positions. Thereafter, similarly, the instruction using the command 703 is repeated and recorded.

When instructing the drive unit 203 to record, in order to transmit the data entity from the control unit 202 to the drive unit 203 regardless of whether the data of the next page to be recorded is user data or dummy data in accordance with the set rules. A plurality of user data and dummy data can be collected and transmitted to the drive unit 203 to instruct recording.

In this way, it is possible to record user data and dummy data in a target data arrangement, and the control unit 202 holds dummy data and transmits transmission data including dummy data and user data to the drive unit. This makes it unnecessary to determine whether or not the recording data is dummy data in the control unit 202.

Next, a procedure for recording the recording source data shown in FIG. 5A so as to have the recording data arrangement shown in FIG. 5B using the information recording / reproducing apparatus shown in FIG. 2 will be described. In this embodiment, an example in which the data extracted by the control unit 202 is transmitted to the drive unit 203 in units of pages will be described.

In the present embodiment, the control unit 202 extracts data from the recording source data in units of pages in consideration of the rules regarding the recording position of the recording unit data at the time of recording and the arrangement position in the recording group, and the drive unit 203 The data extraction in the control unit 202 and the transmission data creation process to the drive unit are simplified.

FIG. 9 illustrates a sequence of data extraction processing in the control unit 202 and data transmission to the drive unit 203. With this sequence, user data and dummy data can be recorded in a target data arrangement. As a premise, it is assumed that the control unit 202 knows the arrangement of dummy pages shown in FIG.

In step 901, the control unit 202 confirms the recording position based on the rule information including the recording order and the recording position of the minimum recording unit data. In step 902, the control unit 202 determines whether the page is a dummy page. If it is not a dummy page, the process proceeds to step 903, and if it is a dummy attribute, the process proceeds to step 906. In step 903, the control unit 202 extracts one page of data from the recording source data. In step 904, the control unit 202 instructs the drive unit 203 to record, and transmits the extracted data for one page to the drive unit 203. In step 905, the control unit 202 confirms whether or not all the page recording instructions in the recording group have been completed. If not completed, the process proceeds to step 901 and proceeds to the next page based on the rule information. In step 906, the control unit 202 issues a dummy recording instruction to the drive unit 203 because the corresponding page is a dummy page.

Here, the control unit 202 gives a dummy recording instruction in the case of a dummy page, but may send a dummy data entity to the drive unit 203 to give a recording instruction.

The drive unit 203 records user data at a designated position when receiving user data and a recording instruction, and records dummy data at a designated position when receiving a dummy recording instruction.

For example, the case where the recording source data is FIG. 5A and the recording image on the target optical information recording medium is FIG. 5B will be described. A page is arranged on 0 degree, 1 degree, 2 degrees, 3 degrees, and 4 degrees with a rotation angle of 0 degree as a reference rotation angle.

Further, in this embodiment, recording is performed in the order of track 1 to track 5, and the recording order of the recording unit data on each track is recorded in the order of data of rotation angle 0 degree, 2 degrees, 4 degrees, 1 degree and 3 degrees. Shall.

The control unit 202 determines whether or not the page at the rotation angle 0 degrees on the left end of the track 1 is a dummy page. Since it is a dummy page, the control unit 202 issues a dummy recording instruction to the drive unit 203. The drive unit 203 that has received the dummy recording instruction records dummy data. Next, the control unit 202 determines whether or not the page at a rotation angle of 2 degrees is a dummy page. Since it is user data, the control unit 202 extracts a2 which is data arranged at a rotation angle of 2 degrees from the recording source in FIG. 5A, transmits the extracted user data to the drive unit 203, and issues a recording instruction. Do. Receiving the recording instruction, the drive unit 203 records user data. The same applies to other pages. After recording for one track is completed, recording is performed in the same manner on the next track.

In this way, data can be recorded in the target data arrangement by extracting data from the recording source data and instructing recording in units of pages. Further, there is no need to store data in the auxiliary memory of the control unit 202 in units of recording groups, or to perform transmission data creation processing for the drive unit, and the auxiliary memory of the control unit 202 can be reduced and the processing load can be reduced. Can do.

Next, an example in which recording is performed while skipping one or more recording units without continuously recording adjacent recording units. When recording is performed in the holographic memory, the recording medium contracts around the recorded area.

Fig. 10 (a) shows a recorded image on the disc. For example, when recording is performed on a1, the a1 area contracts. For example, when recording is next performed in the area a2, the a1 is contracted, the a3 is not contracted, and the contraction state of the recording medium is different between right and left, and adjustment for recording with good quality in the area a2 can be performed. difficult. Therefore, after recording the a1 area, for example, the a3 area is recorded. In the a3 area, the left and right a2 and a4 areas are not recorded, and the contraction state of the medium is uniform, so that adjustment for recording with high quality is easy. Next, when a2 is recorded, a1 and a3 are recorded and contracted, but the left and right contracted states are uniform and adjustment is easy.

Here, the recording units adjacent to the left and right are described, but the same applies to all adjacent recording units. Thus, a method of skipping one or more recording units during recording has been devised. FIG. 10B shows the recording order of each recording unit as an example. When recording is performed as in the recording image shown in FIG. 10A based on the order of FIG. 10B, recording is performed in the order of a1, a3, a5, a2, a4, c1, c3.

The recording order when using such a recording method will be described.

Fig. 11 (a) shows recording source data. When this data is recorded in the order shown in FIG. 10B while skipping the recording positions, it is recorded on the disc as shown in FIG. 11B. While skipping on the track 1, a1, a2, and a3 are recorded, and a4 and a5 are recorded between them. After recording track 1, one track is skipped and b1, b2, and b3 are recorded on track 3, and b4 and b5 are recorded between them. Since track 1 and track 3 are recorded, c1, c2, and c3 are recorded on track 2 between them, and c4 and c5 are recorded therebetween. When playback is performed in the skipped order, playback is possible in the order of the original data as shown in FIG. 11C, but the amount of movement of the disk is larger than when playback is performed sequentially in adjacent recording units.

Fig. 12 (a) shows the recording source data. As shown in FIG. 12B, data is recorded on the disc. For this purpose, it is necessary to arrange data in the order of track 1, track 3, and track 2, and it is also necessary to replace the data in the skip order in each track. As shown in FIG. 12C, the track 1 data is extracted in the order of a1, a3, a5, a2, and a4 in accordance with the skip order. The same applies to track 3 and track 2.

For example, as shown in FIG. 12 (d), the skip order of the data of track 1 may be a4, a2 after a1, a3, a5. This is a method of recording from a4, which is closer to moving to the position of a2 after recording a5.

Thus, if recording is performed in the order of FIG. 10B in the order of FIG. 12C and FIG. 12D, recording can be performed as shown in FIG. 12B. When the track 1 is reproduced, it is possible to reproduce a1, a2, a3, a4, and a5 in order in the rotation direction of the disc. Compared with the case where the track 1 is recorded as shown in FIG. The amount of movement is reduced, and reproduction becomes simple.

A case where the recording data has a data amount that needs to be cured multiple times (when the recording source data spans a plurality of recording groups) will be described. FIG. 13A shows recording source data. FIG. 13B shows a recording image on the disc. Pre-cure is performed on area A (a1 to c5) and area B (a6 to c10) before recording. It is necessary to record in units of cure units or a plurality of cure units to be recorded simultaneously.

In order to perform recording as shown in FIG. 13 (b), data for the cure area A and the cure area B are extracted in the order of FIG. 14 (a). Each data is rearranged in consideration of skipping as shown in FIG. By recording the rearranged data in the order shown in FIG. 10B, recording can be performed as shown in FIG. 13B. Here, data extraction and rearrangement are performed in order, but a format in which data is directly extracted from the original data as shown in FIG. The data recorded as shown in FIG. 13B can be reproduced in the same order as the original data in FIG. 13A by sequentially reproducing the recording units adjacent to each other in the track 1, the track 2 and the track 3.

As described above, according to the present embodiment, when the input recording source data has a data amount that needs to be cured multiple times (when the recording source data spans a plurality of recording groups), as described above. Even when skip recording is performed, it is possible to realize a flexible reproduction order by rearranging the recording source data across a plurality of recording groups.

Further, although a circular optical information recording medium has been described as an example, the shape is not limited to this.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. 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 for realizing each function can be stored in a recording device such as a memory, a hard disk, and an SSD, or a recording medium such as an IC card, an SD card, and a DVD.

Further, 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.

201 ... information recording / reproducing apparatus 202 ... control unit 203 ... drive unit 210 ... external network 211 ... external memory 220 ... optical information recording medium 701 ... recording order, recording position rule Information setting command 702 ... Dummy recording instruction command 703 ... Recording instruction command 1: Optical information recording medium 10: Optical information recording / reproducing apparatus 11: Pickup 12: Reference optical system for reproduction 13: Cure optical system 14: Disc Rotation angle detection optical system 50: Rotation motor (DC motor or stepping motor)
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 90: Input / output control circuit 91 : External control device

Claims

In an information recording / reproducing apparatus for an optical information recording medium,
A drive unit for performing data recording on an optical information recording medium;
A control unit for controlling recording and reproduction of the drive unit,
The controller is
Divide the recording source data into recording units defined in the recording medium specifications or drive specifications,
Extracting the divided recording source data, grouping by recording group unit,
Sending data to the drive unit in units of the grouped recording groups and instructing recording;
An information recording / reproducing apparatus.
The information recording / reproducing apparatus according to claim 1,
The controller is
Determine rule information including the recording order and recording position of the recording unit data included in the recording group,
Send to the drive unit in order according to the determined rule information and instruct recording.
An information recording / reproducing apparatus.
The information recording / reproducing apparatus according to claim 2,
The rule information determined by the control unit is rule information that does not depend on a recording order or a recording group size, and is a rule information such that a sequence of data to be recorded on an optical information medium is the same track. Playback device.
The information recording / reproducing apparatus according to claim 2,
The control unit sets the rule information in the drive unit,
The information recording / reproducing apparatus, wherein the drive unit records received data in accordance with the set rule information.
The information recording / reproducing apparatus according to claim 1,
The information recording / reproducing apparatus, wherein the control unit groups the divided recording unit data and dummy data together.
The information recording / reproducing apparatus according to claim 1,
The information recording / reproducing apparatus according to claim 1, wherein when the dummy data is recorded, the control unit issues a dummy data recording instruction without data transmission.
The information recording / reproducing apparatus according to claim 1,
The information recording / reproducing apparatus, wherein the drive unit records dummy data when receiving the dummy data recording instruction.
The information recording / reproducing apparatus according to claim 1,
The information recording / reproducing apparatus, wherein the control unit rearranges the divided recording source data across a plurality of recording groups.
The information recording / reproducing apparatus according to claim 2,
When performing skip recording, the rule information is rule information indicating a rule in which data to be recorded on the optical information medium is continuously arranged on the same track without depending on the recording order or the recording group size. Information recording / reproducing apparatus.
The information recording / reproducing apparatus according to claim 1,
The information recording / reproducing apparatus according to claim 1, wherein the recording group unit is a unit for performing curing.
In a method for recording on an optical information recording medium,
Dividing the recording source data into recording units defined by the recording medium specification or drive specification;
Extracting the divided data and grouping in units of recording groups;
Recording data in units of the grouped recording groups;
A recording method characterized by comprising:
The recording method according to claim 11,
A recording method comprising: generating rule information including a recording order and a recording position of recording unit data included in the recording group.
12. Grouping step according to claim 11,
A recording method comprising: grouping the divided recording unit data and dummy data together.
The recording method according to claim 11,
A recording method comprising: determining a recording order and a recording position of recording unit data included in the recording group.
The recording method according to claim 13,
A recording method comprising the step of recording the dummy data.
The recording method according to claim 11,
A recording method comprising the step of rearranging the divided recording source data across a plurality of recording groups.
The recording method according to claim 12,
When performing skip recording, the rule information is rule information indicating a rule in which data to be recorded on the optical information medium is continuously arranged on the same track without depending on the recording order or the recording group size. Recording method.
The information recording / reproducing method according to claim 11,
The information recording / reproducing method, wherein the recording group unit is a unit for performing curing.