WO2015053015A1

WO2015053015A1 - Information processing device, information recording medium, information processing method, and program

Info

Publication number: WO2015053015A1
Application number: PCT/JP2014/073296
Authority: WO
Inventors: 大森　隆; 柏木　俊行; 義浩秋元
Original assignee: ソニー株式会社
Priority date: 2013-10-11
Filing date: 2014-09-04
Publication date: 2015-04-16

Abstract

This invention allows data reproduction with the same processing sequence applied regardless of differences in data recording density. When reproducing data from discs, regardless of differences in the data recording densities of said discs, addresses having the same bit length are applied, an address conversion process using the same address conversion algorithm is performed, and data is reproduced using addresses generated by said address conversion process. When performing a reproduction process, address fields (AF) are generated by an address conversion process accompanied by a bit-value inversion process and a process to switch the data locations of address unit numbers (AUNs) embedded so as to correspond to clusters of data.

Description

Information processing apparatus, information recording medium, information processing method, and program

The present disclosure relates to an information processing device, an information recording medium, an information processing method, and a program. In particular, the present invention relates to an information processing apparatus, an information recording medium, an information processing method, and a program that can use disks with various recording densities.

In recent years, optical discs are widely used as data recording media. In particular, a Blu-ray disc (BD: Blu-ray (registered trademark) Disc) is widely used as an optical disc capable of high-density recording.
In particular, recently, displays capable of displaying high-quality 4K image data have been used, and further higher density of the Blu-ray Disc (BD) has been demanded.

There are various types of Blu-ray Discs (BDs), including low-density BDs, high-density BDs, single-layer discs with only one recording layer, and multi-layer discs with two to four layers. The type BD is mixed.
In the future, BDs with higher density may be used and more types of BDs may be mixed.

Under such circumstances, there are various types of recording / reproducing apparatuses for recording and reproducing data to / from the BD, and apparatuses that can use only a low recording density type BD, or both types of low recording density and high recording density. There is a recording / reproducing apparatus that can use the BD.

In a situation where disks of various recording densities are mixed, there is a problem that a usable disk is limited as a problem of an apparatus that performs recording or reproduction on the disk.
However, on the other hand, there is also a demand to restrict the use, for example, by allowing the use of a high recording density type disk only to a new type recording / reproducing apparatus. As a prior art disclosing processing for realizing such disk use restriction, for example, there is Patent Literature 1 (Japanese Patent No. 4893777).
Patent Document 1 proposes a configuration that can be used only on a specific new type of recording / reproducing apparatus by modifying and recording address information used for reading data from the disk on a high recording density type disk. is doing.

Japanese Patent No. 4893777

As described above, a new type of recording / reproducing apparatus that can use a high recording density type disc has been developed. However, for example, in this new recording / reproducing apparatus, in order to be able to use both a low-density recording type disc and a high-density recording type disc, hardware and programs that execute different processes corresponding to the respective discs There is a problem that the apparatus cost increases.

The present disclosure has been made in view of the above-described problems, for example. An information processing apparatus, an information recording medium, an information processing method, and a program that can use disks with various recording densities in a common processing sequence. The purpose is to provide.

The first aspect of the present disclosure is:
A data processing unit for executing data reproduction from the disc;
The data processing unit
Address conversion processing according to one address conversion algorithm is executed without performing different address conversion processing according to the difference in data recording density of the disc, and data reproduction using the address generated by the address conversion processing is executed. It is in the information processing device.

Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the data processing unit includes an address unit number (AUN: Address Unit Number) embedded in correspondence with data in a cluster unit in an address field (AF: Address Field). An address conversion process to be converted is executed, and in the address conversion process, an address conversion process involving an address unit number (AUN) data position replacement process and a bit value inversion process is executed.

Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the data processing unit is configured by a PSN (Physical Sector Number) set as a physical sector number of a sector, which is a unit area of data set in a disk, Acquires an address unit number (AUN: Address Unit Number) that is embedded in correspondence with data in cluster units, and further executes an address conversion process for converting the address unit number (AUN) into an address field (AF: Address Field). .

Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the data processing unit executes an error correction process to which an error correction code is applied in the address conversion process.

Furthermore, in one embodiment of the information processing apparatus of the present disclosure, the disk is a type 1 disk on which data recording of a low recording density type is performed or a type 2 disk on which data recording of a high recording density type is performed. In both type 1 and type 2, addresses having the same bit length are set as data-corresponding addresses, and the data processing unit performs address reading and address by the same processing for both the type 1 and type 2 disks. Perform the conversion.

Furthermore, in one embodiment of the information processing apparatus of the present disclosure, the disk is a type 1 disk on which data recording of a low recording density type is performed or a type 2 disk on which data recording of a high recording density type is performed. The address setting of the type 1 low recording density type disk is an address of the same bit length set according to the address setting rule of the type 2 high recording density type disk, and the data processing unit The same process as the address reading process and the address conversion process for the type 2 disk is executed for the disk.

Furthermore, in one embodiment of the information processing apparatus of the present disclosure, the type 1 disc on which the low recording density type data is recorded is a disc on which data of about 25 Gbytes per disc layer is recorded, and the high recording density type disc is recorded. The type 2 disc on which data was recorded was a disc on which about 33 Gbytes of data was recorded per layer, and the data processing unit performed the same processing on both the type 1 and type 2 discs. Perform address reading and address translation.

Furthermore, the second aspect of the present disclosure is:
A data processing unit for performing data recording on the disc;
The data processing unit
Execute address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and execute data recording using addresses generated by the address conversion processing It is in the information processing device.

Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the data processing unit sets an address having the same bit length as an address corresponding to data regardless of a difference in data recording density of the disc.

Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data processing unit executes a data recording process of about 25 Gbytes per disc layer or a data recording process of about 33 Gbytes per disc layer, The same bit length is set and the same address conversion is executed.

Furthermore, the third aspect of the present disclosure is:
It is an information recording medium that records about 25 Gbytes of data per disc layer,
The address corresponding to the data recorded on the disc is
This is an address field (AF: Address Field) generated by an address unit number (AUN: Address Unit Number) data position replacement process and an address conversion process accompanied by a bit value inversion process embedded in correspondence with cluster unit data. It is in an information recording medium.

Furthermore, in one embodiment of the information recording medium of the present disclosure, the address corresponding to the data recorded on the disc is set according to the address setting rule of the high recording density type disc on which about 33 Gbytes of data are recorded per disc layer. The address is the same bit length as the address.

Furthermore, the fourth aspect of the present disclosure is:
An information recording medium manufacturing apparatus for manufacturing a disk on which about 25 Gbytes of data is recorded per disk layer,
The data processing unit of the disk manufacturing apparatus is
As an address corresponding to the data recorded on the disc,
An address field (AF: Address Field) generated by an address conversion process that accompanies data position exchange processing and bit value inversion processing of an address unit number (AUN: Address Unit Number) embedded corresponding to cluster unit data is set. In the information recording medium manufacturing apparatus.

Furthermore, the fifth aspect of the present disclosure is:
An information processing method for executing data reproduction processing from a disc in an information processing device,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing There is an information processing method for executing data reproduction to which the address is applied.

Furthermore, the sixth aspect of the present disclosure is:
In an information processing apparatus, an information processing method for performing data recording processing on a disc,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing The information processing method executes data recording to which the address is applied.

Furthermore, the seventh aspect of the present disclosure is:
In an information processing apparatus, a program for executing data reproduction processing from a disk,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. This is in a program that executes data reproduction using the specified address.

Furthermore, an eighth aspect of the present disclosure is
In the information processing apparatus, a program for executing a data recording process on a disk,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. The program is to execute data recording to which the address is applied.

Note that the program of the present disclosure is a program that can be provided by, for example, a storage medium or a communication medium provided in a computer-readable format to an image processing apparatus or a computer system that can execute various program codes. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the information processing apparatus or the computer system.

Further objects, features, and advantages of the present disclosure will become apparent from a more detailed description based on embodiments of the present invention described later and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.

According to the configuration of an embodiment of the present disclosure, data reproduction and recording using the same processing sequence can be performed regardless of the difference in data recording density.
Specifically, for example, when reproducing data from a disc, regardless of the difference in data recording density of the disc, an address having the same bit length is applied, and address conversion processing according to the same address conversion algorithm is executed. Data reproduction using the address generated by the address conversion process is executed. The address field (AF) is generated by the data position exchange process of the address unit number (AUN) embedded corresponding to the cluster unit data and the address conversion process accompanied by the bit value inversion process, and the reproduction process is performed.
In this way, data reproduction and recording using the same processing sequence can be performed regardless of the difference in data recording density.
Note that the effects described in the present specification are merely examples and are not limited, and may have additional effects.

It is a figure explaining the structural example of a disk. It is a figure explaining specifications, such as various types of disc aspects and data recording capacity, of the current BD. It is a figure explaining the difference in a structure of the address unit number (AUN: Address Unit Number) of type 1 and type 2. FIG. It is a figure explaining the address conversion system of the type 1 disc which is a low recording density type disc. It is a figure explaining the address conversion system of the type 1 disc which is a low recording density type disc. It is a figure explaining the address conversion system of the type 2 disc which is a high recording density type disc. It is a figure explaining the address conversion system of the type 2 disc which is a high recording density type disc. It is a figure explaining the error correction encoding (ECC encoding) of address information. It is a figure explaining the ECC format about main data (user data). It is a figure explaining the frame structure of main data. It is a figure which shows the flowchart explaining the frame structure about main data. It is a figure which shows the flowchart explaining the data recording process sequence to a disc. It is a figure which shows the flowchart explaining the data reproduction process sequence from a disc. It is a figure explaining the example of the data reading sequence at the time of data reproduction. It is a figure explaining the address setting structure which solved the problem. It is the figure which summarized the specifications, such as an address setting system according to the system of this indication. It is a figure which shows the flowchart explaining the data recording process sequence to a disc. It is a figure which shows the flowchart explaining the data reproduction process sequence from a disc. Only the address conversion method is shared between

types

1 and 2, and the address configuration is a diagram for explaining a setting example in which type 1 is a conventional type. It is a figure which shows one structural example of the information processing apparatus which performs data recording / reproducing. It is a figure explaining the structural example of a mastering apparatus. FIG. 25 is a diagram illustrating a configuration example of an information processing apparatus that performs data recording / reproduction.

The details of the information processing apparatus, information recording medium, information processing method, and program of the present disclosure will be described below with reference to the drawings. The description will be made according to the following items.
1. 1. Example of disk configuration 2. Address settings and usage examples 3. About error correction coding (ECC encoding) 4. Address use sequence in recording / playback processing 5. Differences in address settings between Type 1 and Type 2 disks and problems 6. Common address setting configuration 7. Recording / playback sequence after address setting standardization 8. Configuration example in which only the address translation method is shared 9. Example of hardware configuration of apparatus for executing recording / reproducing process 10. Configuration example of mastering device 11. Configuration example of a general data recording / reproducing device as a user device Summary of composition of this disclosure

[1. About disk configuration example]
First, a configuration example of a Blu-ray disc (BD: Blu-ray (registered trademark) Disc) will be described with reference to FIG.
As described above, the Blu-ray Disc (BD) includes a low recording density type BD, a high recording density type BD, and a single layer type disc having only one recording layer, and a multilayer having two to four layers. There are mold discs, etc., and various different types of BDs are mixed.

FIG. 1 shows a general configuration example of a Blu-ray Disc (BD) 10.
The BD 10 has a disc information recording area 11 and a user data recording area 12.
Various types of disc information such as disc type, disc size information, and layer configuration information are recorded in the disc information recording area 11.
In the user data recording area 12, content to be reproduced such as a movie is recorded.

The BD 10 includes an R-type or RE-type disc that allows a user to record arbitrary data in the user data recording area 12 in addition to a ROM-type disk in which reproduction target content is recorded in the user data recording area 12 in advance. and so on.

The lower part of FIG. 1 shows a cross-sectional configuration example of the BD 10.
As shown in FIGS. 1A to 1D, the BD 10 has a single recording layer (a) a single layer type (SL) as well as a multi-layer type having a plurality of recording layers. There is a disk. That is, for example, there are the following types of disks shown in FIG.
(A) One layer type (SL: Single Layer)
(B) Two-layer type (DL: Double Layer)
(C) Three-layer type (TL: Triple Layer)
(D) Four-layer type (QL: Quarter Layer)

There are also various settings for data recording capacity and recording method.
FIG. 2 is a table summarizing specifications of various types of discs and data recording capacity of the current BD.
As shown in FIG. 2, the current BD is divided into the following two types.
(1) Type 1 (low recording density type): BD (SL / DL) -ROM, R, RE
(2) Type 2 (high recording density type): BD-XL (TL / QL) -R, RE

The type 1 disc mode is a single layer (SL: Single Layer) or double layer (DL: Double Layer) ROM type or R, RE type disc.
The type 2 disc mode is a three-layer (TL: Triple Layer) or four-layer (QL: Quarter Layer) R, RE type disc.

The type 1 disc has a recording capacity of about 50 Gbytes (gigabytes) or less, and the recording density per layer (G / L (= Gbyte / Layer)) is a low recording density type set to about 25 G / L. It is a disk.
On the other hand, the type 2 disc is a large capacity type disc having a recording capacity of about 100 G or more, and the recording density per layer (G / L) is a high recording density type disc set to about 33 G / L. It is.

The type 1 and type 2 disks have different address setting methods.
A physical sector number of a sector, which is a unit area of data set on a disk, is called a physical sector number (PSN).
When data reproduction is performed, this PSN is converted into an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units. Furthermore, it is necessary to convert the address unit number (AUN) into an address field (AF: Address Field) corresponding to the actual data reproduction order.
A specific example of this process will be described later.

As shown in FIG. 2, type 1 and type 2 have different conversion methods from an address unit number (AUN: Address Unit Number) to an address field (AF: Address Field).
Further, the configuration of the address unit number (AUN: Address Unit Number) is also different.

[2. Address configuration and conversion process]
With reference to FIG. 3, the difference in the configuration of type 1 and type 2 address unit numbers (AUN: Address Unit Number) will be described.
FIGS. 3 (1) and 3 (2) show the address unit number (AUN) structures of the type 1 and type 2 discs, respectively.
As shown in FIG. 3A, the type 1 low recording capacity type disk is formed of AUN0 to AUN3 as an AUN of 4 symbols (1 symbol = 8 bits (1 byte)). These four symbols are indicated by bits A0 to A31.
The five bits A0 to A4 are intra-cluster numbers. A cluster is a unit constituting one RUB (recording unit block) which is a data recording unit.
The 19 bits of A5 to A23 are a cluster address.
The 3 bits A24 to A26 are the layer number (recording layer number).
A27 to A31 are reserved.

On the other hand, in the case of the type 2 optical recording capacity type disc, the AUN structure is the configuration shown in FIG.
In bits A0 to A31 as four symbols AUN0 to AUN3, 5 bits A0 to A4 are intra-cluster numbers.
The 20 bits A5 to A24 serve as a cluster address.
The 3 bits A25 to A27 are the layer number.
A28 to A31 are reserved.
In other words, the number of bits of the cluster address is set to 20 bits in response to the increase in the total number of clusters due to the increase in capacity.
That is, the address field is increased by increasing the number of bits.

Next, the difference between the type 1 and type 2 address translation methods (AUN → AF) will be described with reference to FIGS.
As described above, the physical sector number of a sector, which is a unit area of data set on the disk, is called a physical sector number (PSN).
When data reproduction is performed, this PSN is converted into an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units. Furthermore, it is necessary to generate an address field (AF: Address Field) corresponding to an address corresponding to the actual data reproduction order from the address unit number (AUN).

4 and 5 are diagrams for explaining an address conversion method for a type 1 disc which is a low recording density type disc.
6 and 7 are diagrams for explaining an address conversion method for a type 2 disc which is a high recording capacity type disc.

The uppermost part (A) of FIG. 4 shows (A) PSN (Physical Sector Number) which is a physical sector number of a sector which is a unit area of data set in the disk.
Hereinafter, (B) AUN (address unit number (Address Unit Number)),
(C) PAF (Primary Address Field),
Furthermore, in FIG.
(D) AF (address field (Address Field)),
Each of these configuration examples is shown, and the arrows indicate the correspondence between the addresses and the conversion processing sequence.

When reproducing data from a disk, it is necessary to obtain an AF (address field) from an AUN (address unit number) obtained directly from a PSN (physical sector number) according to a predetermined algorithm.
This algorithm is different between the low recording density type 1 and the high recording capacity type 2 shown in FIG.

First, an address conversion method for a type 1 disc, which is a low recording density type disc, will be described with reference to FIGS.
As shown in FIG. 4, (A) PSN (Physical Sector Number) to (B) AUN (Address Unit Number) is a one-to-one correspondence, and AUN is It can be obtained directly from the PSN. However, fixed values and intra-cluster counter values are set for AU0 to AU4. A cluster is a unit constituting one RUB (recording unit block) which is a data recording unit.

(B) In order to obtain (D) AF (address field (Address Field)) from AUN (address unit number (Address Unit Number)), conversion processing using (C) PAF (primary address field) is performed. Necessary.
(C) PAF (primary address field) corresponds to the generation data of each configuration data (AF0 to AF8) of (D) AF (address field (Address Field)).

As shown in the figure, (C) PAF (primary address field) is composed of elements PAF0 to PAF8. PAF0 to PAF8 are arranged in elements AF0 to AF8 of (D) AF (address field) as shown in FIG. The corresponding data.

(C) PAF (primary address field) has the following configurations.
PAF0 to PAF3 = AUN byte PAF4 = flag bit PAF5 to PAF8 = parity byte Thus, only PAF0 to PAF3 are data that inherits (B) AUN (address unit number), and other data PAF4 PAF8 is data added as bit data used for (B) AUN (address unit number) information flag, error correction, and the like.

Correspondence between (D) AF (address field (Address Field)) and (C) PAF (primary address field) is as follows.
PAF0 = AF0
PAF1 = AF1
PAF2 = AF2
PAF3 = AF3
PAF4 = AF4
PAF5 = AF5
PAF6 = AF6
PAF7 = AF7
PAF8 = AF8
Corresponding in this way.

In the type 1 (low recording density) type disc shown in FIG. 2, the address field (AF) is obtained by the conversion process described with reference to FIGS. 4 and 5, and the contents arranged in accordance with the address field are reproduced. Executed.
In addition, AF has a value of inherited data of AUN (address unit number), a parity bit, and the like, processing such as error correction using these values is executed, and reproduction using the AF value after error correction is performed Is executed. The outline of the error correction process will be described later.

Next, with reference to FIGS. 6 and 7, an address conversion method for a type 2 disc, which is a high recording capacity type disc, will be described.
As shown in FIG. 6, (A) PSN (Physical Sector Number) to (B) AUN (Address Unit Number) is a one-to-one correspondence, and AUN is: It can be obtained directly from the PSN. However, fixed values and intra-cluster counter values are set for AU0 to AU4. A cluster is a unit constituting one RUB (recording unit block) which is a data recording unit.

However, here, the correspondence relationship between (B) AUN shown in FIG. 6 and PAF0 in (C) PAF (primary address field) is the correspondence relationship between the low recording density type 1 shown in FIG. Is different.
That is, the data exchange is set in the data area 51 indicated by the dotted circle frame shown in FIG.
This point is different from the low density recording type 1 shown in FIG.

(C) PAF (primary address field) has the following configurations.
PAF0 to PAF3 = AUN byte PAF4 = flag bit PAF5 to PAF8 = parity byte These configurations are the same as those of the low recording density type 1 described above with reference to FIGS.
Only PAF0 to PAF3 are data that inherits (B) AUN (address unit number), and the other data PAF4 to PAF8 are (B) AUN (address unit number (address unit number) information flags). Or bit data used for error correction or the like.

The correspondence between PAF0 to PAF8 and AF to AF8 is set as follows in the low recording density type 1 described above.
PAF0 = AF0
PAF1 = AF1
PAF2 = AF2
PAF3 = AF3
PAF4 = AF4
PAF5 = AF5
PAF6 = AF6
PAF7 = AF7
PAF8 = AF8

However, in the high-density recording type 2, as shown in FIG. 7, a plurality of inversion operators 61 to 64 are set. The inversion operators 61 to 64 mean that bit value inversion processing is executed. That is, when the bit value = 0, the bit value is inverted, and when the bit value = 1, the bit value = 0 is inverted.
In this manner, in the high-density recording type 2 address conversion processing, the AF configuration bits are set by inverting some of the AUN configuration bits and parity bits.

In the example shown in FIG. 7, the correspondence between (D) AF (address field (Address Field)) and (C) PAF (primary address field) is as follows.
PAF0 = AF0
PAF1 = AF1
PAF2 = Reverse AF2
PAF3 = Reverse AF3
PAF4 = AF4
PAF5 = Reverse AF5
PAF6 = reversed AF6
PAF7 = AF7
PAF8 = AF8
Corresponding in this way.

In the type 2 (high recording density) type disc shown in FIG. 2, the address field (AF) is obtained by the conversion processing described with reference to FIGS. 6 and 7, and the contents arranged in accordance with the address field are reproduced. Executed.
In addition, AF has a value of inherited data of AUN (address unit number), a parity bit, and the like, processing such as error correction using these values is executed, and reproduction using the AF value after error correction is performed Is executed.

As described above, the low-density recording type 1 and the high-density recording type 2 have different address conversion methods for acquiring AF from the AUN. Therefore, it is necessary to execute a conversion algorithm according to the recording density.
In addition, in order to be able to execute these two different types of disc playback, it is necessary to quickly develop different programs and hardware for executing the respective conversion methods.

[3. About error correction coding (ECC encoding)]
Such error correction encoding (ECC encoding) of address information will be described with reference to FIG.
Error correction coding (ECC encoding) of address information is performed in units of address units shown in FIG.
FIG. 8A shows address units AU0 to AU15 each having 9 bytes.
The address unit AU0 is composed of address fields AF0,0 to AF8,0.
The address unit AU1 is composed of address fields AF0,1 to AF8,1.
Similarly, the address units AU15 are each composed of 9 bytes.
One address field AF is one byte (one symbol).

ECC encoding is performed in units of address units of 9 bytes. The address unit AU includes the AUN and parity described above.
For example, taking the address unit AU0 as an example, it is as shown in FIG.
Address unit numbers AUN3, AUN2, AUN1, and AUN0 are assigned to address fields AF0,0, AF1,0, AF2,0, AF3,0 of address unit AU0, respectively.
Address field AF4,0 is a flag bit.
Parities (Parity 3 to Parity 0) are assigned to the address fields AF5,0 to AF8,0.

This error correction by ECC encoding in units of address units has the ability to correct errors within 2 symbols by having 4 symbols of parity within 9 symbols.
That is, the error correction encoded data formed as an address unit is RS (9, 5, 5), code length 9, data 5, and distance 5 RS code.

FIG. 9 shows an ECC format for main data (user data).
There are two types of ECC (error correction code): LDC (long distance code) for main data 64 KB (= 2048 bytes × 32 sectors) and BIS (Burst indicator subcode).

The main data 64KB shown in FIG. 9 (a) is ECC-encoded as shown in FIG. 9 (b). That is, the main data adds 4B EDC (error detection code) for 1 sector 2048B, and encodes LDC for 32 sectors. LDC is RS (248, 216, 33), code length 248, data 216, and distance 33 RS (reed solomon) code. There are 304 code words.

On the other hand, BIS is ECC-encoded as shown in FIG. 9D with respect to 720B (Byte) data shown in FIG. 9C. That is, RS (62, 30, 33), code length 62, data 30, and distance 33 RS (reed solomon) code. There are 24 codewords.

FIG. 10 shows a frame structure for main data.
The LDC data and the BIS constitute the frame structure shown in the figure. That is, for each frame, data (38B), BIS (1B), data (38B), BIS (1B), and data (38B) are arranged to form a 155B structure. That is, one frame is configured by inserting 38B × 4 152B data and 1B of BIS for each 38B.
A frame sync FS (frame synchronization signal) is arranged at the head of one frame 155B. There are 496 frames in one block.
In the LDC data, even-numbered codewords 0, 2,... Are located in even-numbered frames 0, 2,. Located in odd-numbered

frames

1, 3,.

The BIS uses a code having a much better correction capability than the LDC code, and almost all are corrected. That is, a code having a distance of 33 with respect to the code length 62 is used.
Therefore, the BIS symbol in which an error is detected can be used as follows.
When decoding ECC, BIS is decoded first. In the frame structure of FIG. 10, when two adjacent BISs or frame syncs FS are in error, the data 38B sandwiched between them is regarded as a burst error. An error pointer is added to each data 38B. The LDC uses this error pointer to correct the pointer erasure.
As a result, the correction capability can be improved as compared with correction using only LDC.
The BIS includes address information and the like. This address information is used when there is no address information by a wobbling groove on a ROM type disk or the like. Of course, it can also be used for address acquisition during playback on a recordable disc.

Note that the minimum recording unit RUB (recording unit block: recording / reproducing cluster) has a link area for a PLL of 2 frames before and after the 496 frames of the ECC block of the main data shown in FIG. It consists of 498 frames.

FIG. 11 shows an arrangement example of address units in the main data block corresponding to the content to be reproduced, for example.
In the main data block of 496 frames, address units are arranged using BIS in units of 31 frames.
There are 3 bytes of BIS per frame and BIS is 93 bytes in 31 frames, but the address unit is arranged in the first 9 bytes. Control data and the like are arranged in the remaining BIS bytes.

As shown in the figure, the address fields AF0,0 to AF8,0 constituting the address unit AU0 are arranged in 9 bytes of BIS in the first 31 frames.
The address fields AF0,1 to AF8,1 constituting the address unit AU1 are arranged in 9 bytes of BIS in the second 31 frames.
Thereafter, the address units AU2 to AU15 are similarly arranged in the BIS in each 31 frame.

As described above, BIS has a high error correction capability, but error correction of address units is performed in units of address units. This is because the correction using the BIS block in FIG. 9D is not in time for address decoding that requires quickness.
Therefore, the correction capability of the address information depends on the correction capability of the address unit AU, and correction within two symbols is possible as described above.
In other words, an error of 3 symbols or more cannot be corrected. Furthermore, if an error of 3 symbols or more is generated, the address cannot be decoded.

[4. Address use sequence in recording / playback processing]
Next, a use sequence of address information in the recording / reproducing process will be described with reference to the flowchart in FIG.

FIG. 12 is a flowchart for explaining a data recording processing sequence to the disc.

First, in step S101, an address unit number (AUN0 to AUN3) for the data to be recorded and flag data are generated.
Next, in step S102, ECC encoding is performed. That is, 4-symbol parity (Parity 0 to Parity 3) is generated for AUN 0 to AUN 3 and 5 symbols of flag data generated in step S101. As a result, 9 symbols for forming the address unit AU are obtained.

In step S103, AF (address field) generation processing is performed.
The AF (address field) generation processing in step 103 is different between low recording density type 1 and high recording density type 2.

In the case of the low recording density type 1, the process of step S103A is executed. That is, an address conversion process that does not include a bit exchange and inversion process is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.

On the other hand, in the case of the high recording density type 2, the process of step S103B is executed. That is, address conversion processing including bit replacement and inversion processing is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.
For example, it is assumed that bit inversion processing is performed on four symbols of AUN0, AUN1, Parity3, and Parity2 among nine symbols. The symbol bit inversion may invert all 8 bits forming the symbol or invert only a predetermined part of bits. On the other hand, the inversion process is not performed for five symbols AUN2, AUN3, flag bits, Parity1 and Parity0.

When AF (address field) generation is completed in either step S103A or step S103B, encoding for forming recording data (modulated data) is performed in step S104. In the case of a Blu-ray disc, an RLL (1, 7) PP modulation method (RLL: Run Length Limited, PP: Parity preserve / Prohibit rmtr (repeated minimum transition runlength)) is used as a modulation method.

The address information set as the address units AU0 to AU15 described above with reference to FIG. 8 is arranged in the main data block as shown in FIG. 11 described above. The data stream constituting the main data block is RLL (1, 7) PP modulated.
Next, in step S105, laser light emission according to the modulation data is performed, and data recording is performed on the disc.
The above processing, that is, the processing in steps S101 to S105, is performed by a device that performs data recording on the disc.
For example, if the disc is a recordable type, the above-described processing relating to the address is performed during recording in the recording apparatus. When a read-only type disk is assumed, the above-described processing relating to the address is performed in the mastering process of the master disk.

Next, a data reproduction processing sequence from the disc will be described with reference to a flowchart shown in FIG.
First, in step S201, data reading from the disk is executed.

Next, in step S202, the read data is demodulated. That is, demodulation of RLL (1, 7) PP modulated data.
With this demodulating process, for address information, for example, data of each address field constituting the address units AU0 to AU15 of FIG. 8A described above is obtained.

In step S203, AF (address field) generation is executed.
The AF (address field) generation process is different between the low recording density type 1 and the high recording density type 2 as in the recording process. That is, in the case of reproduction from a type 2 disc, which is a high recording density type disc, the data of a predetermined address field has been subjected to bit inversion processing by the deformation processing in step S103B at the time of recording.

In the case of type 1 of the low recording density type, the process of step S203A is executed. That is, an address conversion process that does not include a bit exchange and inversion process is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.

On the other hand, in the case of the high recording density type 2, the process of step S203B is executed. That is, address conversion processing including bit replacement and inversion processing is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.

Here, bit inversion processing is performed on four symbols AUN0, AUN1, Parity3, and Parity2 among the nine symbols constituting the address unit AU. That is, the original symbol value is restored by inverting again the bit inverted in step S103B of the recording process.
On the other hand, since the five symbols AUN2, AUN3, flag bit, Parity1 and Parity0 are not inverted in the process S3, the bit inversion process is not performed here either. By this restoration process, the original address field data is obtained.

Execute either step S203A or step S203B to obtain AUN0 to AUN3, flag data, and Parity0 to Parity3 as the restored address field data. That is, 9 symbols are obtained as the address unit AU.

Next, in step S204, an error correction process using error correction decoding is performed on the address unit AU. In this case, the error correction decoding is performed on the one in which the address unit at the time of ECC encoding in step S102 at the time of the previous recording process is restored by the restoration at step S203A or step S203B.

If ECC decoding is successful and correct AF (address field) is obtained in step S205, the process proceeds to step S206, and correct data reproduction is executed.
However, if ECC decoding fails in step S205 and correct AF (address field) cannot be acquired, the process proceeds to step S207, and data reproduction cannot be executed.

As described above, in the data recording / reproducing process, the processing sequence is different between the low recording density type disc and the high recording density type disc.
Therefore, for example, even if a high-density type 2 disc is loaded in a reproducing apparatus capable of reproducing only the low recording density type 1, reproduction of the correct AF (address field) cannot be performed and reproduction fails. It will be.

Further, in order to achieve a configuration in which both low recording density type 1 reproduction and high density recording type 2 reproduction are possible, both the processing in step S203A and the processing in step S203B shown in FIG. It is necessary to have an executable configuration, resulting in a high cost as an apparatus.

[5. Differences in address settings between Type 1 and Type 2 disks and problems]
As described above with reference to FIG. 2, a low recording density type 1 disc records about 25 Gbytes of data per layer (one layer), while a high recording density type 2 disc About 33 Gbytes of data are recorded per layer (1 Layer).

In order to allow this difference in data recording density, the address structure is different between the low recording density type 1 disc and the high recording density type 2 disc. That is, as described above with reference to FIG. 3, the setting of an address unit (AU) that can be used as a cluster address is changed, and a high recording density type 2 disc has a low recording density type 1 type. The configuration is such that more bits can be used as a cluster address than the above disk.
By changing the setting, the available address space is expanded in the high-density recording type 2 disc, and 33 GB of data can be accessed per layer.

However, due to the difference in address setting, it is necessary to change the data processing at the time of data recording / reproduction in the type 1 and type 2 discs.
An example of a data reading sequence during data reproduction will be described with reference to FIG.

In the graph shown in FIG. 14, the vertical axis indicates PSN (Physical Sector Number), and the horizontal axis indicates the radial position of the disk (inside to outside).
Examples of address (PSN) setting in the following two types are shown.
(1) Type 1 (low recording density type (25 Gbyte / Layer))
(2) Type 2 (high recording density type (33 Gbyte / Layer))
L0 to L3 shown in the figure indicate disk layer identifiers.

(1) An example shown in type 1 (low recording density type (25 Gbyte / Layer)) is an example in which user data is recorded in layer 0 (L0) and layer 1 (L1). As shown on the horizontal axis, the user data recording area ranges from the inner edge of the user area to the outer edge of the user area, and 25 Gbytes of data per layer is recorded in this disk area.
FIG. 14A shows a setting example of a physical sector number (PSN) which is an address used for data access in this setting.

A physical sector number (PSN) corresponds to a physical sector number of a sector which is a unit area of data set on a disk. As described above, when data reproduction is performed, the PSN is converted into an address unit number (AUN: Address Unit Number) embedded in correspondence with data in cluster units. Further, an address field (AF: Address Field) corresponding to an address corresponding to the actual data reproduction order is generated from the address unit number (AUN), and reproduction processing is performed using the reproduction data ordered based on the AF. Executed.

The physical sector number (PSN: Physical Sector Number) and the address unit number (AUN: Address Unit Number) are address data corresponding one-to-one as described with reference to FIGS. is there.
Therefore, the PSN shown as the vertical axis in the graph of FIG. 14 can be interpreted by replacing the address unit number (AUN).

The setting of the physical sector number (PSN) in FIG. 14 (1) type 1 (low recording density type (25 Gbyte / Layer)) will be described.
The PSN of the starting position of the inner end of the user area of layer 0 (L0) is PSN = 00, 10, 00, 00.
The PSNs at the outer edge positions of the layer 0 (L0) user area are PSN = 00, CA, 73, and FE.
PSN is shown in hexadecimal notation of 00, 00, 00, 00 to FF, FF, FF, FF.
In layer 0 (L0), about 25 Gbytes of data is recorded in the set addresses of PSN = 00, 10, 00, 00 to 00, CA, 73, and FE.

The next data following the outer end of layer 0 (L0) is recorded at the outer end of layer 1 (L1). Data is recorded on the layer 1 (L1) from the outer end toward the inner end.
The PSN at the outer edge of the user area of layer 1 (L1) is PSN = 01, 35, 8C, 00.
The PSNs at the user area inner edge position of layer 1 (L1) are PSN = 01, EF, FF, and FE.
In layer 1 (L1), data of about 25 Gbytes is recorded in the set addresses of PSN = 01, 35, 8C, 00 to 01, EF, FF, and FE.

Next, the setting of a physical sector number (PSN) in type 2 (high recording density type (33 Gbyte / Layer)) in FIG. 14 (2) will be described.
The PSN of the starting position of the inner end of the user area of layer 0 (L0) is PSN = 00, 10, 00, 00.
This is the same as the setting of type 1 in FIG.
The PSNs at the outer edge positions of the layer 0 (L0) are PSN = 01, 08, 9B, and FE.

This is different from the setting of type 1 in FIG. 14 (1), and a larger address value is used. This is because the recording data per layer is 33 Gbytes, which is larger than Type 1 25 Gbytes, and it is necessary to expand the address space as the recording data amount increases.
For this address space expansion, for example, as described above with reference to FIG. 3, an expansion process of usable address bits is performed. FIG. 3 illustrates an example of setting the address unit number (AUN). As described above, the physical sector number (PSN) and the address unit number (AUN: Address Unit Number) are as follows. This is address data corresponding to one to one. Accordingly, the physical sector number (PSN) has the same setting as shown in FIG.

In the type 2 disc, data of about 33 Gbytes is recorded in the set address of PSN = 00, 10, 00, 00 to 01, 08, 9B, FE on layer 0 (L0).

The next data following the outer end of layer 0 (L0) is recorded at the outer end of layer 1 (L1). Data is recorded on the layer 1 (L1) from the outer end toward the inner end.
The PSN at the outer edge of the user area of layer 1 (L1) is PSN = 02, F7, 64,000.
The PSNs at the inner edge position of the user area of layer 1 (L1) are PSN = 03, EF, FF, and FE.
In layer 1 (L1), approximately 33 Gbytes of data is recorded in the set addresses of PSN = 0, F7, 64, 00 to 03, EF, FF, and FE.

Further, the next data following the inner end of layer 1 (L1) is recorded at the inner end of layer 2 (L2). In layer 2 (L2), data is recorded from the inner end toward the outer end.
The PSN at the inner edge of the user area of layer 2 (L2) is PSN = 04, 10, 00, 00.
The PSN at the outer edge position of the layer 2 (L2) user area is PSN = 05, 08, 9B, FE.
In layer 2 (L2), data of about 33 Gbytes is recorded in the set addresses of PSN = 04, 10, 00, 00 to 05, 08, 9B, and FE.

The major difference in address setting between (1) Type 1 (low recording density type (25 G / L)) and (2) Type 2 (high recording density type (33 G / L)) is the difference in available address space. It is based on.
Specifically, in the case of (1) Type 1 (low recording density type (25 G / L)), the available address space is small. Therefore, for example, a settable address (PSN) is limited to an area of PSN = 0, 00, 00, 00 or less shown in the drawing.

On the other hand, in the case of (2) Type 2 (high recording density type (33G / L)), the usable address space is large. Therefore, for example, a settable address (PSN) can use an area of PSN = 0,00,00,00 or more shown in the figure, for example, a large address space of PSN = 06,00,00,00 or more.

In type 2 (high recording density type (33 G / L)), the address (PSN) range that can be used in each layer is set as follows.
Layer 0 (L0) = 00, 0B, 92, 00 to 02, 00, 00, 00
Layer 1 (L1) = 0,00,00,00 to 04,00,00,00
Layer 2 (L2) = 04,00,00,00 to 06,00,00,00
The address setting shown in FIG. 14 (2) is a setting in accordance with the above rules.

As described above, since (1) Type 1 (low recording density type (25 G / L)) and (2) Type 2 (high recording density type (33 G / L)) have different address setting methods, data recording is performed. And a device that performs reproduction need to have different address processing depending on each method.
In order to execute the different processing, a program and hardware for performing address processing corresponding to each type are required, which causes a problem that the apparatus cost increases.

[6. About common address setting configuration]
Next, an address setting configuration that solves the above-described problems will be described with reference to FIG.
By solving the above address setting problems, both (1) type 1 (low recording density type (25 G / L)) and (2) type 2 (high recording density type (33 G / L)) An example in which a common address setting method is applied will be described.

That is, (1) Type 1 (low recording density type (25 G / L)) is also used for address setting using an extended address space similar to (2) Type 2 (high recording density type (33 G / L)). Do.
That is, the address setting configuration of FIG. 3 (2) type 2 described above with reference to FIG. 3 is also applied to a type 1 disk.
An example of using the set address (PSN) will be described with reference to FIG.

The graph shown in FIG. 15 is the same as the graph shown in FIG. 14, with the vertical axis indicating PSN (Physical Sector Number) and the horizontal axis indicating the radial position of the disk (inside to outside).
Examples of address (PSN) setting in the following two types are shown.
(1) Type 1 (low recording density type (25 Gbyte / Layer))
(2) Type 2 (high recording density type (33 Gbyte / Layer))
L0 to L3 shown in the figure indicate disk layer identifiers.

(1) An example shown in type 1 (low recording density type (25 Gbyte / Layer)) is an example in which user data is recorded in layer 0 (L0) and layer 1 (L1). As shown on the horizontal axis, the user data recording area ranges from the inner edge of the user area to the outer edge of the user area, and 25 Gbytes of data per layer is recorded in this disk area.
FIG. 15A shows a setting example of a physical sector number (PSN) which is an address used for data access in this setting.

The setting of the physical sector number (PSN: Physical Sector Number) in FIG. 15 (1) Type 1 (low recording density type (25 Gbyte / Layer)) will be described.
The PSN of the starting position of the inner end of the user area of layer 0 (L0) is PSN = 00, 10, 00, 00.
The PSNs at the outer edge positions of the layer 0 (L0) user area are PSN = 00, CA, 73, and FE.
In layer 0 (L0), about 25 Gbytes of data is recorded in the set addresses of PSN = 00, 10, 00, 00 to 00, CA, 73, and FE.
This address use is the same as the setting of FIG. 14 (1) described above.

The next data following the outer end of layer 0 (L0) is recorded at the outer end of layer 1 (L1). Data is recorded on the layer 1 (L1) from the outer end toward the inner end.
The setting of the layer 1 address (PSN) is different from the setting shown in FIG.
The PSN at the outer edge of the user area of layer 1 (L1) is PSN = 0, 35, 8C, 00.
The PSNs at the inner edge position of the user area of layer 1 (L1) are PSN = 03, EF, FF, and FE.
In layer 1 (L1), about 25 Gbytes of data is recorded in the set addresses of PSN = 0, 35, 8C, 00 to 03, EF, FF, and FE.

This layer 1 (L1) address setting expands the usable address space, enables the same address space as type 2 (high recording density type (33 Gbyte / Layer)), and follows the type 2 address setting rules. It is a thing. That is, as described above, in type 2 (high recording density type (33 G / L)), the address (PSN) range that can be used in each layer is set as follows.
Layer 0 (L0) = 00, 10, 00, 00 to 02, 00, 00, 00
Layer 1 (L1) = 0,00,00,00 to 04,00,00,00
Layer 2 (L2) = 04,00,00,00 to 06,00,00,00
The address setting shown in FIG. 15 (1) is a setting according to the above rule.

The setting of the type 2 (high recording density type (33 Gbyte / Layer)) physical sector number (PSN: Physical Sector Number) shown in FIG. 15 (2) is the same as the example shown in FIG. 14 (2). .

With this common address setting method, data recording processing and reproduction processing for a disc can be performed using either type 1 (low recording density type (25 Gbyte / Layer)) or type 2 (high recording density type (33 Gbyte / Layer)) disc. In some cases, it can be shared.

FIG. 16 shows a summary of the specifications of the disk mode and address setting method of this method. FIG. 16 is a table summarizing the same specifications as those of FIG. 2 described above.
As shown in FIG. 16, when this method is applied, the specifications are the same for both type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)).
The disc mode is BD-ROM, which is a multi-layer disc of two layers (DL), three layers (TL), and four layers (QL).
The capacity can be used for disks having various data capacities ranging from about 50 Gbytes or less to about 100 Gbytes or more.
The recording density is also used for disks with different recording densities such as 25 Gbyte / Layer, 33 Gbyte / Layer, and the like.

The address conversion method (AUN → AF) is commonly used as the conversion method (Modified). That is, the address conversion method described above with reference to FIGS. 6 and 7 is common to type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)). Used for

The AUN address configuration is also commonly used for the extended type (Extended) type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)).
That is, the address information type 1 that uses the expanded address space that is conventionally used only in the type 2 is also commonly used.

As described above, by sharing the address setting and conversion method of type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)), content recording and playback are possible. It is possible to make the processing sequence a common sequence.

[7. Recording and playback sequence after common address settings]
Next, as shown in FIG. 16, type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)) are configured with a common address utilization configuration. The recording / reproducing process will be described.

FIG. 17 is a flowchart for explaining a data recording processing sequence to the disc. This flow corresponds to the flow of FIG. 12 described above.
The flow shown in FIG. 12 described above was set to execute different processes on the type 1 and type 2 disks. However, the flow shown in FIG.

First, in step S301, an address unit number (AUN0 to AUN3) for data to be recorded and flag data are generated.
In step S302, ECC encoding is performed. That is, 4-symbol parity (Parity 0 to Parity 3) is generated for AUN 0 to AUN 3 and 5 symbols of flag data generated in step S301. As a result, 9 symbols for forming the address unit AU are obtained.

In step S303, AF (address field) generation processing is performed.
In the flow shown in FIG. 12 described above, the AF (address field) generation processing in step 303 is different between low recording density type 1 and high recording density type 2.
However, in the flow shown in FIG. 17, the processing is common to the low recording density type 1 and the high recording density type 2.

For both the low recording density type 1 and the high recording density type 2, the process of step S303 is executed. That is, address conversion processing including bit replacement and inversion processing is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.
For example, it is assumed that bit inversion processing is performed on four symbols of AUN0, AUN1, Parity3, and Parity2 among nine symbols. The symbol bit inversion may invert all 8 bits forming the symbol or invert only a predetermined part of bits. On the other hand, the inversion process is not performed for five symbols AUN2, AUN3, flag bits, Parity1 and Parity0.

When AF (address field) generation is completed in step S303, encoding for forming recording data (modulated data) is performed in step S304. In the case of a Blu-ray disc, an RLL (1, 7) PP modulation method (RLL: Run Length Limited, PP: Parity preserve / Prohibit rmtr (repeated minimum transition runlength)) is used as a modulation method.

The address information set as the address units AU0 to AU15 described above with reference to FIG. 8 is arranged in the main data block as shown in FIG. 11 described above. The data stream constituting the main data block is RLL (1, 7) PP modulated.
Next, in step S305, laser light emission according to the modulation data is performed, and data recording is performed on the disc.
The above processing, that is, the processing in steps S301 to S305, is performed by an apparatus that performs data recording on the disc.
For example, if the disc is a recordable type, the above-described processing relating to the address is performed during recording in the recording apparatus. When a read-only type disk is assumed, the above-described processing relating to the address is performed in the mastering process of the master disk.

Next, a data reproduction processing sequence from the disc will be described with reference to a flowchart shown in FIG. This flow corresponds to the flow of FIG. 13 described above.
The flow shown in FIG. 13 described above was set to execute different processes for the type 1 and type 2 disks, but the flow shown in FIG. 18 is the same for both

types

1 and 2.

First, data reading from the disk is executed in step S401.

Next, in step S402, the read data is demodulated. That is, demodulation of RLL (1, 7) PP modulated data.
With this demodulating process, for address information, for example, data of each address field constituting the address units AU0 to AU15 of FIG. 8A described above is obtained.

In step S403, AF (address field) generation is executed.
In the flow shown in FIG. 13 described above, the AF (address field) generation processing in step 403 is different between low recording density type 1 and high recording density type 2.
However, in the flow shown in FIG. 18, the processing is common to the low recording density type 1 and the high recording density type 2.

In both cases of the low recording density type 1 and the high recording density type 2, the process of step S403 is executed. That is, address conversion processing including bit replacement and inversion processing is executed to generate an address field (AF).
This process corresponds to the process described above with reference to FIGS.

Here, bit inversion processing is performed on four symbols AUN0, AUN1, Parity3, and Parity2 among the nine symbols constituting the address unit AU. That is, the original symbol value is restored by inverting again the bit inverted in step S303 of the recording process.
On the other hand, since the five symbols AUN2, AUN3, flag bit, Parity1 and Parity0 are not inverted in the process S3, the bit inversion process is not performed here either. By this restoration process, the original address field data is obtained.

Step S403 is executed to obtain AUN0 to AUN3, flag data, and Parity0 to Parity3 as the address field data subjected to the restoration process. That is, 9 symbols are obtained as the address unit AU.

Next, in step S404, error correction processing using an error correction code (ECC) is performed on the address unit AU. In this case, the error correction decoding is performed on the address unit at the time of ECC encoding of step S302 at the time of the previous recording process by the restoration at step S403.

If ECC decoding is successful and correct AF (address field) is acquired in step S405, the process proceeds to step S406, and correct data reproduction is executed.
However, if ECC decoding fails in step S405 and correct AF (address field) cannot be acquired, the process proceeds to step S407, and data reproduction cannot be executed.

In this way, in the data recording / reproducing process, it is possible to perform a common address reading and address conversion process on a low recording density type disc and a high recording density type disc and execute a common processing sequence.
That is, both the type 1 and type 2 are configured so that addresses having the same bit length are set as data-corresponding addresses, and the data processing unit that executes the recording / reproducing process is applicable to both the type 1 and type 2 disks. With the same processing, it is possible to execute address setting and address conversion, or address reading and address conversion.
As a result, it is possible to share a program and hardware for executing the data recording / playback processing sequence, and it is possible to reduce the cost of the apparatus.

[8. About a configuration example in which only the address translation method is shared]
In the embodiment described above, as described with reference to FIG.
(A) The address conversion method is the conversion method (Modified) described with reference to FIGS.
(B) Extended address configuration (Extended)
The explanation has been given as an example in which both (a) and (b) are made common.
That is, in both type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)), the address conversion method described with reference to FIGS. This is an embodiment in which the method (Modified) is used and the address configuration is extended (Extended).

However, for example, only the address conversion method can be shared between

types

1 and 2, and the address configuration can be set so that type 1 is a conventional type.
That is, the setting shown in FIG.
FIG. 19 is a table summarizing the same specifications as FIG. 16 described above.
As shown in FIG. 19, when this modification method is applied, settings other than the AUN address configuration are set for both type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)). All have the same specifications.
The disc mode is BD-ROM, which is a multi-layer disc of two layers (DL), three layers (TL), and four layers (QL).
The capacity can be used for disks having various data capacities ranging from about 50 Gbytes or less to about 100 Gbytes or more.
The recording density is also used for disks with different recording densities such as 25 Gbyte / Layer, 33 Gbyte / Layer, and the like.

For AUN address configuration,
Type 1 (low recording density type (25 Gbyte / Layer)) applies an original type having a small available address space.
Only type 2 (high recording density type (33 Gbyte / Layer)) uses the extended type (Extended) in which the usable address space is expanded.

In this method, the address configuration of type 1 (low recording density type (25 Gbyte / Layer)) and type 2 (high recording density type (33 Gbyte / Layer)) is different, but the address conversion method is shared, so the address is As the conversion process, the conversion process according to FIGS. 6 and 7 described above can be executed in common.

[9. Example of hardware configuration of a device that executes recording / playback processing]
Next, a hardware configuration example of an information processing apparatus that performs data recording on a disk or data reproduction from a disk will be described.

FIG. 20 shows a configuration example of an information processing apparatus that executes data recording / reproduction.
Each component of the information processing apparatus illustrated in FIG. 20 functions as a data processing unit that executes processing according to the above-described embodiment.
The disk 100 is loaded on a turntable (not shown) and is driven to rotate at a constant linear velocity (CLV) by the spindle motor 102 during the recording / reproducing operation.

During recording, main data is recorded on the track by the optical pickup 101, and during reproduction, user data and addresses recorded by the optical pickup are read out.

The pickup 101 irradiates a disk recording surface with a laser diode serving as a laser light source, a photodetector for detecting reflected light, an objective lens serving as an output end of the laser light, and the laser light via the objective lens, and the reflected light thereof. An optical system that guides the light to a photodetector.

The objective lens of the pickup 101 is held movably in the tracking direction and the focus direction by a biaxial mechanism.
The entire pickup 101 can be moved in the disk radial direction by a thread mechanism. The laser diode in the pickup 101 is driven to emit laser light by a drive signal (drive current) from the laser driver 113.

Reflected light information from the disk 100 is detected by a photo detector, converted into an electrical signal corresponding to the amount of received light, and supplied to the matrix circuit 104.
The matrix circuit 104 includes a current-voltage conversion circuit, a matrix calculation / amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as photodetectors, and generates necessary signals by matrix calculation processing.
For example, a high frequency signal (reproduction data signal) corresponding to reproduction data, a focus error signal for servo control, a tracking error signal, and the like are generated.

The reproduction data signal output from the matrix circuit 104 is supplied to the ECC processing unit 105, the focus error signal and tracking error signal are supplied to the servo circuit 111, and the push-pull signal is supplied to the wobble circuit 108, respectively.

The reader / writer circuit 105 performs binarization processing on the reproduction data signal, reproduction clock generation processing using a PLL, etc., reproduces the data read by the pickup 101, and supplies the data to the modulation / demodulation circuit 106. The modem circuit 106 includes a functional part as a decoder during reproduction and a functional part as an encoder during recording.
At the time of reproduction, demodulation processing is performed based on the reproduction clock as decoding processing.

The ECC processing unit 107 performs ECC encoding processing for adding an error correction code during recording and ECC decoding processing for performing error correction during reproduction.
At the time of reproduction, the data demodulated by the modem circuit 106 is taken into the internal memory, and error detection / correction processing, deinterleaving processing, and the like are performed to obtain reproduction data.
The data decoded up to the reproduction data by the ECC processing unit 107 is read out and transferred to an AV (Audio-Visual) system 120 based on an instruction from the system controller 110.
The address decoded by the ECC processing unit 107 is supplied to the system controller 110 and used for access processing and the like.

The wobble circuit 108 is a processing circuit for a groove wobbling signal set in a writable disc. The push-pull signal output from the matrix circuit 104 is demodulated in the wobble circuit 108, converted into an address, and supplied to the address decoder 109.
The address decoder 109 decodes the supplied data, obtains an address value as a wobble address, and supplies it to the system controller 110.
The address decoder 109 generates a clock by PLL processing using the wobble signal supplied from the wobble circuit 108, and supplies it to each unit as an encode clock at the time of recording, for example.

At the time of recording, recording data is transferred from the AV system 120. The recording data is sent to a memory in the ECC processing unit 107 and buffered.
In this case, the ECC processing unit 107 performs error correction code addition, interleaving, subcode addition, and the like as encoding processing of the buffered recording data.
The ECC encoded data is modulated by the modulation / demodulation circuit 106 and supplied to the reader / writer circuit 105.
As described above, the clock generated from the wobble signal is used as the reference clock for the encoding process during recording.

The recording data generated by the encoding process is subjected to recording compensation processing by the reader / writer circuit 105, and fine adjustment of the optimum recording power and adjustment of the laser drive pulse waveform with respect to the recording layer characteristics, laser beam spot shape, recording linear velocity, etc. Etc. are sent to the laser driver 113 as a laser drive pulse.
The laser driver 113 applies the supplied laser drive pulse to the laser diode in the pickup 1 to perform laser emission driving. As a result, a mark corresponding to the recording data is formed on the disc 100.

The laser driver 113 includes a so-called APC circuit (Auto Power Control), and the laser output is monitored regardless of the temperature or the like while monitoring the laser output power by the output of the laser power monitoring detector provided in the pickup 101. Control to be constant. The target value of the laser output at the time of recording and reproduction is given from the system controller 110, and control is performed so that the laser output level becomes the target value at the time of recording and reproduction.

The servo circuit 111 generates various servo drive signals for focus, tracking, and sled from the focus error signal and tracking error signal from the matrix circuit 104 and executes the servo operation. That is, a focus drive signal and a tracking drive signal are generated according to the focus error signal and the tracking error signal, and the focus coil and tracking coil of the biaxial mechanism in the pickup 101 are driven. As a result, a pickup servo 101, a matrix circuit 104, a servo circuit 111, a tracking servo loop by a biaxial mechanism, and a focus servo loop are formed.

Also, the servo circuit 111 executes a track jump operation by turning off the tracking servo loop and outputting a jump drive signal in response to a track jump command from the system controller 110.

The servo circuit 111 generates a thread drive signal based on a thread error signal obtained as a low frequency component of the tracking error signal, an access execution control from the system controller 110, and the like, and drives the pickup 101 holding unit, The pickup 101 is moved.

The spindle servo circuit 112 controls the spindle motor 2. The spindle servo circuit 112 obtains, for example, a clock generated by processing for the wobble signal as current rotation speed information of the spindle motor 102, and compares this with a predetermined reference speed to generate a spindle error signal.

Further, at the time of data reproduction, the reproduction clock (clock serving as a reference for decoding processing) generated by the PLL in the reader / writer circuit 105 becomes the current rotational speed information of the spindle motor 102. A spindle error signal can also be generated by comparing with the speed information.

The spindle servo circuit 112 outputs a spindle drive signal generated according to the spindle error signal, and causes the spindle motor 102 to rotate. In addition, the spindle servo circuit 112 generates a spindle drive signal in accordance with a spindle kick / brake control signal from the system controller 110, and executes operations such as starting, stopping, acceleration, and deceleration of the spindle motor 102.

Various operations of the servo system and the recording / reproducing system as described above are controlled by a system controller 110 formed by a microcomputer.
The system controller 110 executes various processes in accordance with commands from the AV system 120.

For example, when a write command (write command) is issued from the AV system 120, the system controller 110 first moves the pickup 101 to an address to be written. Then, the ECC processing unit 107 and the modulation / demodulation circuit 106 execute the encoding process as described above on the data transferred from the AV system 120 (for example, video data of various systems such as MPEG2 or audio data). Then, recording is executed by supplying the laser drive pulse from the reader / writer circuit 105 to the laser driver 113 as described above.

Further, for example, when a read command for requesting transfer of recording data (such as MPEG2 video data) on the disc 100 is supplied from the AV system 120, seek operation control is first performed for the instructed address. That is, a command is issued to the servo circuit 111, and the access operation of the pickup 101 targeting the address specified by the seek command is executed.
Thereafter, operation control necessary for transferring the data in the designated data section to the AV system 120 is performed. That is, data reading from the disk 100 is performed, decoding / buffering and the like in the reader / writer circuit 105, the modem circuit 106, and the ECC processing unit 107 are executed, and the requested data is transferred.

At the time of data recording / reproduction, the system controller 110 controls access and recording / reproduction operations using the wobble address detected by the wobble circuit 108 and the address decoder 109 and the in-data address obtained by the ECC processing unit 107. Do.

Here, the ECC processing unit 107 performs processing such as processing S301 to S303 in FIG. 17 at the time of recording.
That is, in order to record the in-data address, the address unit number (AUN0 to AUN3) and flag data to be recorded are generated as processing S301. In step S302, ECC encoding is performed. For 5 symbols of AUN0 to AUN3 and flag data, 4-symbol parity (Parity0 to Parity3) is generated.
Then, bit transformation is performed on the four symbols AUN0, AUN1, Parity3, and Parity2 as a modification process of process S303. Then, an address field is formed as an ECC encode block with the symbol of the inversion processing result.

The ECC encoded data is supplied to the modulation / demodulation circuit 106 and modulated. Further, laser light emission driving based on the modulation signal by the RW circuit 105 and the laser driver 113 is performed, and data recording is performed.

Further, at the time of reproduction, the ECC processing unit 107 performs the processing of processing step 404 in FIG.
Information read from the disk 100 is demodulated by the matrix circuit 104, the RW circuit 105, and the modem circuit 106 as described above.
As a result, regarding the address information, the data of each address field constituting the address units AU0 to AU15 is obtained and supplied to the ECC processing unit 107.

As described above, since the data of the predetermined address field is subjected to the bit inversion process by the deformation process at the time of recording, the ECC processing unit 107 performs the restoration process. For example, bit inversion processing is performed on four symbols AUN0, AUN1, Parity3, and Parity2 among the nine symbols constituting the address unit AU. By this restoration process, the original address field data is obtained. The ECC processing unit 107 performs ECC decoding processing. As a result, the address information (AUN0 to AUN3) is decoded, and the ECC processing unit 107 supplies the address information to the system controller 110.

In the disk drive device of this example, by performing the above processing, it is possible to properly read the in-data address and the wobble address during recording or reproduction on the disk. Accordingly, proper reproduction and recording operations can be performed.

20 is a disk drive device connected to the AV system 120, the disk drive device according to the embodiment may be integrated or connected to, for example, a personal computer. Furthermore, there may be a form that is not connected to other devices. In that case, an operation unit and a display unit are provided, and the configuration of the data input / output interface and the like is different from that in FIG. That is, it is only necessary that recording and reproduction are performed in accordance with a user operation and a terminal portion for inputting / outputting various data is formed.
Of course, there are various other configuration examples. For example, examples of a recording-only device and a reproduction-only device are also possible.

[10. Example of mastering device configuration]
Subsequently, a configuration example of a mastering apparatus as an embodiment of the data recording apparatus will be described.
The disc manufacturing process is roughly divided into a so-called master process (mastering process) and a disc forming process (replication process). The master disc process is a process until the completion of the metal master disc (stamper) used in the disc making process, and the disc making step is a process for mass-producing an optical disc that is a duplicate of the stamper.

Specifically, in the master process, so-called cutting is performed, in which a photoresist is applied to a polished glass substrate, and pits and grooves are formed on the photosensitive film by exposure with a laser beam. When cutting is completed, after performing predetermined processing such as development, information is transferred onto the metal surface by, for example, electroforming, and a stamper necessary for copying the disk is created.

Next, using this stamper, the information is transferred onto a resin substrate by, for example, an injection method, and after a reflective film is formed thereon, a process such as processing into a required disk form is performed to obtain a final product disk. Manufacturing.

For example, as shown in FIG. 21, the mastering apparatus includes an information output unit 171, an address generation unit 172, a switching unit 173, a cutting unit 174, and a controller 170.
Each component of the apparatus shown in FIG. 21 functions as a data processing unit that executes various processes in disk manufacture according to the above-described embodiment.
The information output unit 171 outputs prerecorded information prepared in the premastering process. The address generation unit 172 sequentially outputs values as absolute addresses.

The cutting unit 174 includes an optical unit (182, 183, 184) that performs cutting by irradiating a laser beam onto a glass substrate 151 coated with an inorganic resist or the like. Further, a substrate control unit 185 that rotationally drives and slides the glass substrate 151 is provided. In addition, a signal processing unit 181 that converts input data into recording data and supplies it to the optical unit, and a sensor 186 that can determine the cutting position from the position of the substrate control unit 185 are provided.

As the optical unit, a laser 182, a modulation unit 183 that modulates light emitted from the laser 182 based on recording data, and a modulation beam from the modulation unit 183 is condensed to the photoresist surface of the glass substrate 151. A cutting head 184 for irradiation is provided.

The substrate control unit 185 includes a rotation motor that rotates the glass substrate 151, a detection unit (FG) that detects the rotation speed of the rotation motor, a slide motor that slides the glass substrate 151 in the radial direction, The servo motor is configured to control the rotation speed of the rotary motor and slide motor, the tracking of the cutting head unit 184, and the like.

The signal processing unit 181 adds, for example, an error correction code or the like to prerecorded information or address information supplied via the switching unit 173, for example, and performs formatting processing or formatting processing data. A modulation signal generation process is performed in which a predetermined arithmetic process is performed to form a modulation signal.
Based on the modulation signal, a driving process for driving the optical modulator and the optical deflector of the modulation unit 183 is also performed.

In the cutting unit 174, when cutting, the substrate control unit 185 rotates the glass substrate 151 at a constant linear velocity, and a spiral track is formed at a predetermined track pitch while the glass substrate 151 is rotated. Slide like so.
At the same time, the light emitted from the laser 182 is irradiated to the photoresist surface of the glass substrate 151 from the cutting head unit 184 through the modulation unit 183 as a modulated beam based on the modulation signal from the signal processing unit 181. As a result, the photoresist is exposed based on data and grooves.

The controller 170 controls the operation of the cutting unit 174 during cutting, and controls the information output unit 171, the address generation unit 172, and the switching unit 173 while monitoring the signal from the sensor 186.
At the start of cutting, the controller 170 sets the slide position of the substrate rotation control unit 185 to the initial position so that the cutting head unit 184 starts laser irradiation from the innermost side with respect to the cutting unit 174. Then, rotation driving and slide transfer of the glass substrate 151 are started. In this state, prerecorded information is output from the prerecorded information generating unit 171 and supplied to the signal processing unit 181 via the switching unit 173. Further, the laser output from the laser 182 is started, and the modulation unit 183 modulates the laser beam based on the modulation signal from the signal processing unit 181, that is, the FM code modulation signal of the pre-recorded information, so that the groove to the glass substrate 151 is obtained. Perform cutting. As a result, the disc information data is cut into the disc information recording area.

Thereafter, when the controller 170 detects from the signal of the sensor 186 that the cutting operation has proceeded to the end position of the disc information recording area, the controller 170 switches the switching unit 173 to the address generating unit 172 side, and sets the address value from the address generating unit 172. Instruct to generate sequentially.
As a result, address information is supplied from the address generation unit 172 to the signal processing unit 181 via the switching unit 173. The laser beam from the laser 182 is modulated by the modulation unit 183 based on the modulation signal from the signal processing unit 181, that is, the modulation signal of the address information, and cutting on the glass substrate 151 is performed by the modulated laser beam. As a result, predetermined content data is cut into the user data recording area.

When the controller 170 detects from the signal of the sensor 186 that the cutting operation has reached the end of the lead-out zone, the controller 170 ends the cutting operation.
Thereafter, development, electroforming and the like are performed to produce a stamper, and the above-described disk is produced using the stamper.

A recordable type disc mastering device forms a wobbling groove applicable to an address. However, a mastering device that manufactures a reproduction-only type disc exposes a pit row, not a wobbling groove. In that case, address information and user data are encoded, and the laser beam from the laser 182 is modulated in accordance with the encoded data.
In the case of such a mastering device, a user data output unit is provided instead of the information output unit 171 in FIG. The signal processing unit 181 performs ECC encoding on the user data and address information from the address generation unit 172. As a result, the pit row exposure of the master for producing the read-only disc is performed. Thereafter, development, stamper manufacture, substrate creation, layer formation such as a recording layer and a cover layer are performed, and a disc is manufactured.

[11. Configuration example of a general data recording / reproducing apparatus as a user apparatus]
Data recording to the disk and data reproduction processing from the disk can also be executed in a device such as a PC having a disk drive.
With reference to FIG. 22, a hardware configuration example of an information processing apparatus such as a PC that performs data recording and reproduction processing will be described.

A CPU (Central Processing Unit) 201 functions as a data processing unit that executes various processes according to a program stored in a ROM (Read Only Memory) 202 or a storage unit 208. For example, processing according to the flow in the embodiment described above is executed.
A RAM (Random Access Memory) 203 appropriately stores programs executed by the CPU 201, data, and the like. These CPU 201, ROM 202, and RAM 203 are connected to each other by a bus 204.

The CPU 201 is connected to an input / output interface 205 via a bus 204. The input / output interface 205 is connected to an input unit 206 including various switches, a keyboard, a mouse, and a microphone, and an output unit 207 including a display and a speaker. Yes. The CPU 201 executes various processes in response to a command input from the input unit 206, and outputs a processing result to the output unit 207, for example.

The storage unit 208 connected to the input / output interface 205 includes, for example, a hard disk, and stores programs executed by the CPU 201 and various data. The communication unit 209 communicates with an external device via a network such as the Internet or a local area network.

The drive 210 connected to the input / output interface 205 drives a removable medium 211 that is an optical disk to be recorded or reproduced, and executes data recording and reproduction. This recording / reproducing process is performed according to a recording / reproducing program executed by the CPU 201 functioning as a data processing unit.

[12. Summary of composition of the present disclosure]
As described above, the embodiments of the present disclosure have been described in detail with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the gist of the present disclosure. In other words, the present invention has been disclosed in the form of exemplification, and should not be interpreted in a limited manner. In order to determine the gist of the present disclosure, the claims should be taken into consideration.

The technology disclosed in this specification can take the following configurations.
(1) having a data processing unit for executing data reproduction from a disc;
The data processing unit
Address conversion processing according to one address conversion algorithm is executed without performing different address conversion processing according to the difference in data recording density of the disc, and data reproduction using the address generated by the address conversion processing is executed. Information processing device.

(2) The data processing unit executes an address conversion process for converting an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units into an address field (AF: Address Field), and The information processing apparatus according to (1), wherein in the conversion process, an address unit number (AUN) data position exchange process and an address conversion process involving a bit value inversion process are executed.

(3) The data processing unit embeds addresses corresponding to cluster unit data from PSN (Physical Sector Number) set as a physical sector number of a sector which is a unit area of data set on the disk. The unit number (AUN: Address Unit Number) is acquired, and further, an address conversion process for converting the address unit number (AUN) into an address field (AF: Address Field) is executed. (1) or (2) Information processing device.

(4) The information processing apparatus according to any one of (1) to (3), wherein the data processing unit executes an error correction process using an error correction code in the address conversion process.

(5) The disc is a type 1 disc with low recording density type data recording or a type 2 disc with high recording density type data recording. Both the type 1 and type 2 discs have the same bit length. Are set as data-corresponding addresses, and the data processing unit executes address reading and address conversion by the same processing for both the type 1 and type 2 disks. ) The information processing apparatus according to any one of the above.

(6) The disk is a type 1 disk on which data recording of a low recording density type is performed, or a type 2 disk on which data recording of a high recording density type is performed. The address setting is an address of the same bit length set in accordance with the address setting rule of the type 2 high recording density type disk, and the data processing unit applies the type 1 disk to the type 2 disk. The information processing apparatus according to any one of (1) to (5), wherein the same processing as the address reading processing and the address conversion processing is executed.

(7) A type 1 disc recorded with low recording density type data is a disc on which about 25 Gbytes of data is recorded per layer, and a type 2 disc with high recording density type data recording is The data processing unit records about 33 Gbytes of data per layer of the disk, and the data processing unit executes address reading and address conversion by the same processing for both the type 1 and type 2 disks. ) To (6).

(8) having a data processing unit for performing data recording on the disc;
The data processing unit
Execute address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and execute data recording using addresses generated by the address conversion processing Information processing device.

(9) The data processing unit executes an address conversion process for converting an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units into an address field (AF: Address Field), and The information processing apparatus according to (8), wherein in the conversion process, an address unit number (AUN) data position exchange process and an address conversion process involving a bit value inversion process are executed.

(10) The data processing unit embeds addresses corresponding to cluster unit data from a PSN (Physical Sector Number) set as a physical sector number of a sector which is a unit area of data set on the disk. The unit number (AUN: Address Unit Number) is acquired, and further, an address conversion process for converting the address unit number (AUN) into an address field (AF: Address Field) is executed. (8) or (9) Information processing device.

(11) The information processing apparatus according to any one of (8) to (10), wherein the data processing unit executes an error correction process using an error correction code in the address conversion process.

(12) The information processing apparatus according to any one of (8) to (11), wherein the data processing unit sets an address having the same bit length as an address corresponding to data regardless of a difference in data recording density of the disc.

(13) The data processing unit executes data recording processing of about 25 Gbytes per disc layer or data recording processing of about 33 Gbytes per disc layer, and performs address setting of the same bit length in any processing, The information processing apparatus according to any one of (8) to (12), wherein the same address conversion is executed.

(14) An information recording medium in which data of about 25 Gbytes per disc layer is recorded,
The address corresponding to the data recorded on the disc is
This is an address field (AF: Address Field) generated by an address unit number (AUN: Address Unit Number) data position replacement process and an address conversion process accompanied by a bit value inversion process embedded in correspondence with cluster unit data. Information recording medium.

(15) The address corresponding to the data recorded on the disc is an address having the same bit length as the address set according to the address setting rule of the high recording density type disc on which about 33 Gbytes of data is recorded per disc layer. (14) The information recording medium according to (14).

(16) An information recording medium manufacturing apparatus for manufacturing a disk in which data of about 25 Gbytes per disk is recorded,
The data processing unit of the disk manufacturing apparatus is
As an address corresponding to the data recorded on the disc,
An address field (AF: Address Field) generated by an address conversion process that accompanies data position exchange processing and bit value inversion processing of an address unit number (AUN: Address Unit Number) embedded corresponding to cluster unit data is set. Information recording medium manufacturing apparatus.

(17) An information processing method for executing data reproduction processing from a disc in an information processing device,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing Processing method for executing data reproduction to which an address is applied.

(18) An information processing method for executing a data recording process on a disc in an information processing apparatus,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing Processing method for executing data recording to which the address is applied.

(19) A program for executing data reproduction processing from a disk in an information processing apparatus,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. Program that executes data playback using the specified address.

(20) A program for executing a data recording process on a disc in an information processing apparatus,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. Program that executes data recording using the specified address.

Further, the series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing processing by software, the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run. For example, the program can be recorded in advance on a recording medium. In addition to being installed on a computer from a recording medium, the program can be received via a network such as a LAN (Local Area Network) or the Internet and installed on a recording medium such as a built-in hard disk.

In addition, the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary. Further, in this specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.

As described above, according to the configuration of an embodiment of the present disclosure, data reproduction and recording using the same processing sequence can be performed regardless of the difference in data recording density.
Specifically, for example, when reproducing data from a disc, regardless of the difference in data recording density of the disc, an address having the same bit length is applied, and address conversion processing according to the same address conversion algorithm is executed. Data reproduction using the address generated by the address conversion process is executed. The address field (AF) is generated by the data position exchange process of the address unit number (AUN) embedded corresponding to the cluster unit data and the address conversion process accompanied by the bit value inversion process, and the reproduction process is performed.
In this way, data reproduction and recording using the same processing sequence can be performed regardless of the difference in data recording density.

10 Blu-ray Disc (BD)
11 Disc Information Recording Area 12 User Data Recording Area 100 Disc 101 Optical Pickup 102 Spindle Motor 104 Matrix Circuit 105 Reader / Writer Circuit 106 Modulation / Demodulation Circuit 107 ECC Processing Unit 108 Wobble Circuit 109 Address Decoder 110 System Controller 111 Servo Circuit 112 Spindle Servo Circuit 113 Laser driver 120 AV system 151 Glass substrate 170 Controller 171 Information output unit 172 Address generation unit 173 Switching unit 174 Cutting unit 181 Signal processing unit 182 Laser 183 Modulating unit 184 Cutting head unit 185 Substrate control unit 201 CPU
202 ROM
203 RAM
204 Bus 205 Input / Output Interface 206 Input Unit 207 Output Unit 208 Storage Unit 209 Communication Unit 210 Drive 211 Removable Media

Claims

A data processing unit for executing data reproduction from the disc;
The data processing unit
Address conversion processing according to one address conversion algorithm is executed without performing different address conversion processing according to the difference in data recording density of the disc, and data reproduction using the address generated by the address conversion processing is executed. Information processing device.
The data processing unit
An address conversion process for converting an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units into an address field (AF: Address Field) is executed.
2. The information processing apparatus according to claim 1, wherein in the address conversion process, an address unit number (AUN) data position exchange process and an address conversion process including a bit value inversion process are executed.
The data processing unit
Address unit number (AUN: Address Unit Number) embedded corresponding to cluster unit data from PSN (Physical Sector Number) set as physical sector number of sector which is unit area of data set on disk The information processing apparatus according to claim 1, further comprising: performing address conversion processing for converting the address unit number (AUN) into an address field (AF: Address Field).
The data processing unit
The information processing apparatus according to claim 1, wherein an error correction process using an error correction code is executed in the address conversion process.
The disc is a type 1 disc with low recording density type data recording or a type 2 disc with high recording density type data recording,
For both Type 1 and Type 2, addresses with the same bit length are set as data-compatible addresses,
The data processing unit
The information processing apparatus according to claim 1, wherein address reading and address conversion are executed by the same processing for both the type 1 disk and the type 2 disk.
The disc is a type 1 disc with low recording density type data recording or a type 2 disc with high recording density type data recording,
The address setting of the type 1 low recording density type disk is an address of the same bit length set according to the address setting rule of the type 2 high recording density type disk,
The data processing unit
The information processing apparatus according to claim 1, wherein the same processing as an address reading process and an address conversion process for the type 2 disk is executed on the type 1 disk.
The type 1 disc on which the data recording of the low recording density type is performed is a disc on which about 25 Gbytes of data is recorded per disc layer.
The type 2 disc on which high recording density type data was recorded is a disc on which about 33 Gbytes of data is recorded per disc layer.
The data processing unit
The information processing apparatus according to claim 1, wherein address reading and address conversion are executed by the same processing for both the type 1 disk and the type 2 disk.
A data processing unit for performing data recording on the disc;
The data processing unit
Execute address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and execute data recording using addresses generated by the address conversion processing Information processing device.
The data processing unit
An address conversion process for converting an address unit number (AUN: Address Unit Number) embedded corresponding to data in cluster units into an address field (AF: Address Field) is executed.
The information processing apparatus according to claim 8, wherein in the address conversion process, an address conversion process including an address unit number (AUN) data position replacement process and a bit value inversion process is executed.
The data processing unit
Address unit number (AUN: Address Unit Number) embedded corresponding to cluster unit data from PSN (Physical Sector Number) set as physical sector number of sector which is unit area of data set on disk The information processing apparatus according to claim 8, further executing an address conversion process of converting an address unit number (AUN) into an address field (AF: Address Field).
The data processing unit
The information processing apparatus according to claim 8, wherein an error correction process using an error correction code is executed in the address conversion process.
The data processing unit
9. The information processing apparatus according to claim 8, wherein an address having the same bit length is set as an address corresponding to data regardless of a difference in data recording density of the disc.
The data processing unit
A data recording process of about 25 Gbytes per disc layer or a data recording process of about 33 Gbytes per disc layer is performed, the address setting of the same bit length is performed in any processing, and the same address conversion is executed. The information processing apparatus according to 8.
It is an information recording medium that records about 25 Gbytes of data per disc layer,
The address corresponding to the data recorded on the disc is
This is an address field (AF: Address Field) generated by an address unit number (AUN: Address Unit Number) data position replacement process and an address conversion process accompanied by a bit value inversion process embedded in correspondence with cluster unit data. Information recording medium.
The address corresponding to the data recorded on the disc is:
15. The information recording medium according to claim 14, wherein the information recording medium is an address having the same bit length as an address set in accordance with an address setting rule of a high recording density type disc on which about 33 Gbytes of data is recorded per disc layer.
An information recording medium manufacturing apparatus for manufacturing a disk on which about 25 Gbytes of data is recorded per disk layer,
The data processing unit of the disk manufacturing apparatus is
As an address corresponding to the data recorded on the disc,
An address field (AF: Address Field) generated by an address conversion process that accompanies data position exchange processing and bit value inversion processing of an address unit number (AUN: Address Unit Number) embedded corresponding to cluster unit data is set. Information recording medium manufacturing apparatus.
An information processing method for executing data reproduction processing from a disc in an information processing device,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing Processing method for executing data reproduction to which an address is applied.
In an information processing apparatus, an information processing method for performing data recording processing on a disc,
The data processing unit of the information processing apparatus performs address conversion processing according to one address conversion algorithm without performing different address conversion processing according to the difference in data recording density of the disc, and is generated by the address conversion processing Processing method for executing data recording to which the address is applied.
In an information processing apparatus, a program for executing data reproduction processing from a disk,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. Program that executes data playback using the specified address.
In the information processing apparatus, a program for executing a data recording process on a disk,
The address conversion process according to one address conversion algorithm is performed on the data processing unit of the information processing apparatus without performing different address conversion processes according to the difference in data recording density of the disc, and is generated by the address conversion process. Program that executes data recording using the specified address.