JP3529025B2 - Digital information recording method and digital information recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk writing device.

[0002]

2. Description of the Related Art The procedure for producing an optical disc is as follows: (1) Digital data is subjected to logical formatting defined for various optical discs such as CD and DVD, and (2) Recording and reproduction on the optical disc are possible. After being physically formatted in (3), it is recorded in each recording medium such as (3) CD or DVD. The logical format of DVD is ISO9660
And UDF (Universal Disk F), which is a subset of ISO13364.
ormat). For example, movie source is DVD
When attempting to write on a disc, a cutting master is produced by a procedure in which video information and audio information are separately subjected to digital signal processing such as information compression, and the respective pieces of completed information are multiplexed. With optical discs, several chapters are provided so that you can jump to the beginning of your favorite song or jump to the middle of the scene in the case of movies, for example, in the case of karaoke software that records multiple songs during disc playback. It is set. This chapter is expressed by a logical address value, and is multiplexed in reproduction information together with video information and audio information as sub information and recorded in the cutting master.

In the physical format, an error correction code is added to reproduction information so that a signal is read from a recording medium by an optical head such as a magnetic head or an optical pickup and the above-mentioned logically formatted signal can be accurately extracted. Or, the arrangement of information is regularly changed to improve the reproduction signal restoration capability, or digital modulation is performed to limit the length of pits and lands to a length suitable for the characteristics of the optical pickup. is doing. Further, the optical disc has a lead-in area for recording sub information such as disc management information,
There is a data area for recording a reproduction signal and a lead-out area for filling the recording area after the data area is completed.The recording area including each area has continuous physical sector addresses for a predetermined amount of information. Has been added. The logical address is not actually written in the recorded information. The logical address indicates the order of "sectors" obtained by dividing the reproduction information in units of 2048 bytes. The address value of the start sector is 0, and the address information such as chapters is numbered from the 0th sector. It only records if there is any in the sub information.

The video information and the audio information are not regularly multiplexed, and their identification is made by a flag in each logical sector. However, the logical address can be easily converted in one disk by adding or subtracting a predetermined offset value to the physical address. The disc reproducing device is reproducing information while reading the physical sector address written in the disc.However, when jumping to an arbitrary chapter, the disc reproducing device is written in the logical format. A method of reading the logical address value of the jump destination and jumping to the physical sector address destination obtained by adding or subtracting the offset value to this value is used.

Therefore, the logical address and the physical address must always have a constant offset value. However, when the logically formatted cutting master is physically formatted and recorded on the optical disk, a bit shift is caused for some reason. If an error occurs in the signal processing system such as, the offset value between the logical address and the physical address may be incorrect. If the optical disc as described above is erroneously produced as it is, reproduction may not be possible. Conventionally, when manufacturing a read-only optical disc for a DVD, whether the logical address and the physical address are recorded with the correct offset values is determined by cutting the optical disc master, pressing the finished master, and molding the product. If the plate is not completed,
I can't confirm. This is because a method called a variable transfer rate is used for compressing video information, and a correct video cannot be reproduced even if the continuously transferred information is decoded.

FIG. 3 shows a manufacturing mastering process (process) of each disk from the glass plate polishing step of the optical disk to the final label printing step. As shown in Figure 3, the manufacturing mastering process (step) is (1)
(2) After the pretreatment process (glass plate polishing process 1, photoresist coating process 2), (3) record the signal on the master (laser light recording process 3). Next, (6) to (9) in Fig. 3
After going through the steps of manufacturing the metal master, the mother, and the stamper (metal master manufacturing step 6, mother manufacturing step 7, stamper manufacturing step 9), (11), (12) a protective layer that enables the final inspection of the optical disk. Molding and label printing steps (transparent protective layer molding step 11, label printing step 12) are performed, but as a whole, a large number of steps (steps 1 to 12)
It takes a considerable amount of time. Therefore, if there is a case where a recording signal with an incorrect address shift is written, manufacturing efficiency becomes extremely poor due to time loss, material cost loss, and the like.

The conventional digital information recording apparatus (recording step 3 of the mastering apparatus) has the structure shown in FIG. 5, in which thick lines indicate signal lines and thin lines indicate control lines. The digital information recording device includes a physical address generator 40 to which master data is supplied, a multiplexer 41, a multiplexer 44, and an EDC (Error Detection Code) operation unit 4.
3, ECC (Error Correction Code) operation unit 47, scramble unit 46, interleave unit 49, DSV (Digit
al Sum Value) Control unit 50, 8/16 modulation unit 51 that outputs a cutting signal, system controller 52A, signal controller 52B, master controller 52C
And a cutting device 53.

The input master data is the multiplexer 4
1 is supplied. A control signal from a signal controller 52B, which will be described later, is supplied to the physical address generation unit 40B, and the output of the physical address generation unit 40B is supplied to the multiplexer 41. The output of the multiplexer 41 is supplied to the multiplexer 44 and the EDC operation unit 43. The output of the multiplexer 44 is supplied to the ECC calculator 47 and the multiplexer 48 via the scrambler 46. The output of the multiplexer 48 is an 8/16 modulator 5 having an interleaver 49 and a DSV controller 50.
1 to the cutting device 53.

[0009]

As described above, conventionally, when a read-only optical disc such as a DVD is manufactured, whether the logical address and the physical address are recorded with the correct offset values is a problem. There was a problem that it could not be confirmed unless the molded product plate was cut by pressing the master plate of No. 3, and pressing from the completed master plate. This is because a method called a variable transfer rate is used for compressing video information, and a correct video cannot be reproduced even if the continuously transferred information is decoded. If a recording signal with an erroneous address shift is written, there is a problem that manufacturing efficiency becomes extremely poor due to time loss, material cost loss, and the like.

[0010]

[Means for Solving the Problems] As a means for solving the above-mentioned problems, according to the DVD standard, the rule that the "standard identifier" of the ISO9660 standard must be recorded with a fixed value in a sector of a determined logical address. And "Anchor Volume Des" in the sector next to the last sector of the playback information.
We paid attention to the rule that a part of "criptor Point" must be recorded without fail. In the present invention, at the stage of adding a physical address to the logical data by the physical formatter for each logical sector during cutting, the ISO9660 standard " When the physical address value 030010 (hexadecimal number), which is to be recorded with the “standard identifier”, is indicated, the information to be recorded is recorded at a predetermined location of the second byte to the sixth byte of the data in the logical sector. A standard identifier for the ISO 9660 standard
The function to confirm whether it indicates "CD001" (ASCII character), and when the physical address of the last sector of the playback information is added, "AnchorVolume" is written at a predetermined location from the 1st byte to the 4th byte in the sector. Descriptor Point "
It has a fixed value, and has either one of the functions of confirming whether it is 02 00 02 00 (hexadecimal number) or not.

According to the present invention, at the disc master making stage,
It becomes possible to inspect whether the physical address is correctly added with a value given a constant offset value to the logical address, and the time loss and material loss when a defect occurs can be greatly reduced. Can be done.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the digital information recording apparatus of the present invention will be described below with reference to FIGS. 1, 2 and 4. In FIG. 1 of the present invention, an address shift detection unit 12 is added to the conventional FIG. In FIG. 1, thick lines indicate signal lines and thin lines indicate control lines. The digital information recording apparatus of this embodiment includes a physical address generator 10, multiplexers 11 and 14, an address shift detector 12, E.
DC (Error Detection Code) operation unit 13, scramble unit 16, ECC (Error Correction Code) operation unit 17,
Interleave unit 19, DSV (Digital Sum Value) control unit 20, 8/16 modulation unit 2 that outputs a cutting signal
1, system controller 22A, signal controller 22B, master controller 22C, cutting device 23A, and cutting stop (stop) device 23B
It is composed of

The input master data is the multiplexer 1
1 is supplied. A control signal from a signal controller 22B described later is supplied to the physical address generation unit 10B, and the output of the physical address generation unit 10B is supplied to the multiplexer 11. The output of the multiplexer 11 is supplied to the multiplexer 14, the address shift detector 12, and the EDC calculator 13. Multiplexer 14
Is output to the ECC calculator 1 through the scrambler 16.
7, supplied to the multiplexer 18. The output of the multiplexer 18 is the interleave unit 19 and the DSV control unit 2.
Cutting device 2 via an 8/16 modulator 21 with zero
Supplied to 3A.

At the time of cutting by the cutting device 23A, the physical sector address is recorded in all of the lead-in area, the data area and the lead-out area. In the physical format, the physical positions on the disc (positions with a radius of n cm from the center, etc.) that are the lead-in area, the data area, and the lead-out area are determined. A certain physical sector address is predetermined. That is, during disk cutting, the master controller 22C detects the position information of the laser beam from the cutting device 23A, sends the information to the system controller 22A, and sends an operation start signal to the physical address generator 10B via the signal controller 22B. And the timing of outputting the reproduction start signal to the master data reproducing device 10A is controlled.

The content of the master data of the master data reproducing apparatus 10A does not include the data in the lead-in and lead-out areas, but in the case of the logically formatted data for recording in the data area, the data in the data area of the physical sector address is recorded. Start address and start address of logical address (0 address)
Are always matched. The outputs of the master data reproducing device 10A and the physical address generator 10B are supplied to the next multiplexer 11. Multiplexer 11
Is output from the address shift detection unit 12, the EDC calculation unit 13,
And to the multiplexer 14.

A flow chart of an embodiment of the address shift detection unit 12 of the present invention is as shown in FIG. First, the final physical address of the reproduction data is acquired (final address = LAST). (Step 23) Physical sector data is acquired (physical address = PSN). (Step 24) Is PSN = 030010 (HEX) (first address)? (Step 25) If Step 25 is Yes, go to the judgment condition 1. (Step 26) Judgment condition 1 is whether or not the predetermined location of the second byte to the sixth byte in the logical sector of the ISO9660 standard identifier: physical sector address 030010 (HEX) is "CD001" (first identifier). If step 26 of determination condition 1 is Yes, no address shift is transmitted to the master controller 22C. (Step 29A) If Step 26 of the judgment condition 1 is No, the address shift occurrence is transmitted to the master controller 22C. (Step 29B)

If step 25 is No, is PSN = LAST (second address)? (Step 27) If the result at step 27 is Yes, go to judgment condition 2. (Step 28) Judgment condition 2 is Anchor Volume Descriptor Point: whether or not the predetermined portion of the first byte to the fourth byte of the data of the last sector of the reproduction data is "02 00 02 00" (second identifier). If step 27 is No, return to step 24. If step 28 of the judgment condition 2 is Yes, no address shift is transmitted to the master controller 22C. (Step 29A) If Step 28 of the judgment condition 2 is No, the generation of the address shift is transmitted to the master controller 22C. (Step 29B) The address shift detection of the present invention detects whether or not the two physical sector address values match, determines whether or not several bytes of data in the logical sector are equal, and outputs the result to the master controller 22C. Supply.

FIG. 4 shows a block diagram of an embodiment of the address shift detection unit of the present invention. This address shift detection unit 1
2 is composed of comparators 30 to 33, AND circuits 36 to 37, NOT circuits 34 and 35, and an OR circuit 38B. The step of the judgment condition 1 is configured by the comparators 30 and 31, the logical product circuits 36A and 36B, and the negation circuit 34 in the upper half shown in FIG. 4, and the comparator 3 in the lower half in FIG.
2, 33, AND circuits 37A and 37B, and NOT circuit 3
5 constitutes the step of the determination condition 2. The outputs of the AND circuits 36B and 37B are supplied to the OR circuit 38B, and the output of the OR circuit 38B is supplied to the system controller 22A via the signal controller 22B. In this way, when one of the AND circuits 36B and 37B has an output, as described later, the recording medium,
For example, it is configured to forcibly and immediately stop the continuous recording on the DVD disc.

Further, the final address of the reproduced data is a value immediately before the start address of the lead-out area, and its acquisition is not shown in the figure, but conventionally, the lead-in area and the data area are added in the physical address adding step. A circuit for adding the identification flag of the lead-out area together with the physical sector address is included, which can be realized by a circuit equivalent to the acquisition of physical address information necessary for switching the identification flag. The determination result of the address shift detection unit 12 is transmitted to the system controller 22A via the signal controller 22B. The determination result of the address shift detection unit 12, the master controller 22 C, a signal from the determination result the system controller 22A is supplied to produce a cutting stop (STOP) signal.

[0020] cutting stop (stop) signal is, without permission
The leading address shift signal which is the output of the AND circuit 36B and the end address shift signal which is the output of the AND circuit 37B, which are the determination results of the address shift detection unit 12 and are supplied to the swing canceling device 23B. OR circuit 38
This signal is supplied to B and is generated as the output of the OR circuit 38B. The cutting canceling device 23B of the cutting device 23A is supplied with the cutting canceling signal, and can forcibly terminate the cutting or notify the cutting operator of the occurrence of the error. Therefore, the address shift, which has hitherto been unknown only by the inspection after the completion of the disc, can be detected in the recording process on the disc master by the address shift detection. The OR circuit 38B may be provided not in the address shift detection circuit 12 but in the master controller 22B.

The present invention can naturally be used for cutting a disc having a dual layer structure. In this case,
In the recording of the first layer, the detection unit in the first (first) portion operates at the time of recording the inner peripheral portion at the beginning of recording, and it is possible to know whether or not there is an address misalignment error on the disc at the first portion. In the second layer recording, recording from the outside to the inside,
When recording the inner circumference at the end of the record, the final (second)
The detection part in the part operates, and it is possible to know whether or not there is an address error in the recorded disc. However, for example, there may be a case where a bit shift or a byte shift occurs in the forward or backward direction after the “standard identifier” of the ISO9660 standard, and then a shift of data of the same length occurs in the opposite direction of the shift. Although it is conceivable, the probability of occurrence of such a phenomenon is considered to be extremely rare, and the present invention does not consider this case.

[0022]

According to the present invention, it is possible to prevent the logical address and the physical address from being deviated from the determined offset values and recorded on the optical disk by a simple method and circuit. In addition, address misalignment, which could not be identified only by inspection after completion of the disk, can be identified in the process of recording on the disk master, resulting in significant time loss and material loss when address misalignment occurs. Can be reduced to

[Brief description of drawings]

FIG. 1 shows a block diagram of an embodiment of a digital information recording apparatus of the present invention.

FIG. 2 shows a flow chart of an embodiment of the digital information recording apparatus of the present invention.

FIG. 3 is a diagram showing a manufacturing mastering process (process) of an optical disc.

FIG. 4 shows a block diagram of an embodiment of an address shift detection unit of the digital information recording apparatus of the present invention.

FIG. 5 shows a block diagram of an example of a conventional digital information recording device.

[Explanation of symbols]

10A master data reproducing device 10B Physical address generator 11, 14, 18 multiplexer 12 Address shift detector 13 EDC calculator 16 scrambler 17 ECC calculator 19 Interleave section 20 DSV control unit 21 8/16 Modulator 22A system controller 22B signal controller 22C master controller 23A cutting device 23B Cutting stop (stop) device 30, 31, 32, 33 Comparator 34, 35 Negative circuit 36A, 36B, 37A, 37B AND circuit 38B OR circuit

Continuation of front page (56) Reference JP-A-6-139573 (JP, A) JP-A-5-109205 (JP, A) JP-A-8-273162 (JP, A) JP-A-1-14776 (JP , A) JP 9-139052 (JP, A) JP 7-169205 (JP, A) JP 11-250587 (JP, A) JP 59-96582 (JP, A) JP 62-259266 (JP, A) JP-A-63-317961 (JP, A) International Publication 97/024723 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 20/10 G11B 20/12 G11B 27/00-27/06 G11B 20/18

Claims (2)

(57) [Claims] 1. A digital information recording method for producing a cutting master , wherein a physical sector address is added to data having a predetermined information array for each logical sector and recorded on a recording medium. When the information is recorded on the recording medium by adding the physical sector address, when the value of the physical sector address of the first portion of the data area indicates the predetermined first address, the predetermined number in the logical sector is set. The information that should be recorded in the location is the first
Of detecting whether indicates an identifier, said digital information when recording by adding the physical sector address to the recording medium body, the value of the physical sector address of the second portion of the data area of a predetermined When the second address is indicated, one of the steps of detecting whether or not the information to be recorded at a predetermined location in the logical sector is a predetermined second identifier A method for recording digital information, characterized in that, when an object is detected , the operation for producing the cutting master is stopped. 2. A digital information recording apparatus for manufacturing a cutting master , wherein a physical sector address is added to data having a predetermined information array for each logical sector and recorded on a recording medium. When the information is recorded on the recording medium by adding the physical sector address, when the value of the physical sector address of the first portion of the data area indicates the predetermined first address, the predetermined number in the logical sector is set. The information that should be recorded in the location is the first
For detecting whether the digital information is recorded on the recording medium with a physical sector address added, the value of the physical sector address of the second portion of the data area is a predetermined value. When address 2 is indicated, means for detecting whether or not the information to be recorded at a predetermined position in the logical sector is a predetermined second identifier, and means for either one of the means for detecting both in case of detecting something other than the identifier, the cutting mass
A digital information recording apparatus, characterized in that it has means for stopping the data production operation .