JP2005158135A - Information recording apparatus, information reproducing apparatus, information recording medium, method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for recording and reproducing additional information which is hardly analyzed on and from an information recording medium, and to provide the medium, a method, and a computer program. <P>SOLUTION: User control data (UCD) included in recording data for the information recording medium are adjusted and additional data are stored by making DC control bits, set corresponding to the data having been adjusted, correspond to the additional data. The DC control bits included in the recording data have a DC control bit value which is correctly set based upon a DSV measurement result and it becomes difficult to discriminate between the DC control bits corresponding to the additional data and other DC control bits and the additional data of high difficulty in analysis can be stored, so that cipher key information etc., can be embedded in an analysis-difficult form. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information recording processing device, an information reproduction processing device, an information recording medium, a method, and a computer program. More specifically, for example, additional information such as key information, content playback control information, copy control information, and a password applied to content decryption processing is recorded on an information recording medium that records content such as image data and music data. In the configuration that enables reading, the user control data (UCD) included in the recording data is adjusted, and the additional data is obtained by making the DC control bit set corresponding to the adjusted data correspond to the additional data. The present invention relates to an information recording processing device, an information reproduction processing device, an information recording medium and method, and a computer program that increase the difficulty of analysis.

  When data such as music data and image data is recorded as digital data on a recording medium, a recording process according to a predetermined recording format is performed. For example, an error detection / correction code is added to the original data to be recorded, and it is recorded after being converted (coded) into a format corresponding to a specific data recording / reproducing process.

  In recent years, a system for recording and reproducing information using a blue laser as an information recording medium capable of recording high-density information has been developed. In the information recording process using the blue laser, a modulation process for basically modulating 2-bit data into 3-bit data is performed.

  By the way, as contents to be stored in such an information recording medium, there are, for example, movies and music data. Many contents, such as music data and image data, generally have distribution rights or the like held by the creator or seller. Therefore, when distributing these contents, it is common to adopt a configuration that restricts the use of the contents, that is, permits the use of the contents only to authorized users and prevents unauthorized copying or the like. It is the target.

  A large-capacity recording medium such as a recording medium using a blue laser recording system capable of high-capacity recording can record data for one to several movies, for example, on one medium. As content can easily be recorded as digital information, the problem of flooding of illegal copies often occurs, and the problem of obstructing the interests of copyright holders and distributors of content becomes large. ing. Under such circumstances, how to prevent illegal copying and protect the interests of copyright holders and distribution rights holders is an important issue.

  In order to prevent such unauthorized use of content, the content stored in the information recording medium is recorded as encrypted content, and encryption key information to be applied as the encryption key of the encrypted content or a part of the data is configured Information, or encryption key generation information such as data necessary for generating an encryption key (for example, seed) or various control information such as content reproduction control and copy control is stored as secret information in an information recording medium. A configuration is proposed. A configuration in which a playback processing program executed in a playback device of a user reads secret information such as a key corresponding to the content to be played, decrypts the content according to the read secret information, and executes use of the content according to the playback control information It is.

  For example, Patent Document 1 discloses a configuration in which special data is embedded by applying a connection bit (margin bit) of EFM modulation data as a prior art that discloses a secret information embedding processing configuration. Patent Document 2 discloses a configuration in which a plurality of conversion tables are applied to the modulation process, and data related to the conversion table applied to the modulation is extracted during reproduction, and additional data is acquired based on the extracted data. Disclosure.

However, if information such as where such an encryption key or control information is stored in an information recording medium is acquired by a user or an unauthorized content user, additional information can be leaked or altered. There is a problem of end. For example, problems such as falsification of reproduction control information and copy control information, or leakage of key information occur. If the encryption key is leaked or the control information is tampered with, the usage form of the content based on the legitimate content usage right will be lost, and the copyright and usage right of the content will not be adequately protected. is there.
JP 2003-45128 A JP 2002-367282 A

  The present invention has been made in view of the above-described problems. For example, additional information such as key information and content applied to content decryption processing are recorded on an information recording medium that records content such as image data and music data. In a configuration in which playback control information, copy control information, a password, and the like can be recorded and read, the user control data (UCD) included in the recorded data is adjusted, and the DC set corresponding to the adjusted data An object of the present invention is to provide an information recording processing device, an information reproduction processing device, an information recording medium and method, and a computer program capable of increasing the difficulty of analyzing the additional data by making the control bit correspond to the additional data. And

The first aspect of the present invention is:
In the information recording processing apparatus,
A modulation data generating unit that performs data modulation processing on recording target data and DC control bit setting processing based on DSV measurement, and generates a modulated recording frame as recording unit data;
Stored in the additional data setting recording frame so that at least one or more DC control bits set in the additional data setting recording frame have a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on the DSV measurement. A user control data control unit that executes data adjustment processing of user control data to be performed;
It is in the information recording processing apparatus characterized by having.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the user control data control unit is configured such that the DC control bit value of the frame part storing the user control data included in the additional data setting recording frame has an additional data configuration bit. The user control data adjustment processing is executed so that the corresponding bit values are equal to each other.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the user control data control unit is configured such that the DC control bit value set by the DSV measurement based on the original data of the additional data setting recording frame is added to the additional data configuration bit. A user who stores the additional data setting recording frame so that the DC control bit value becomes a bit value corresponding to the additional data configuration bit when it is determined whether or not it is compatible. It is a configuration that executes a configuration bit change process of control data.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the user control data control unit divides a modulation recording frame of a frame part for setting a DC control bit corresponding to an additional data configuration bit into a plurality of data areas. The present invention is characterized in that a process for determining an adjustment mode of a configuration bit of user control data is executed based on a DSV measurement value of a section data area unit.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the information recording processing apparatus includes: encryption key information, encryption key generation information, content reproduction control information of content stored in the information recording medium, the additional data, The configuration is set as configuration information of at least one of content copy control information and password.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the modulation data generation unit generates a modulation recording frame by executing data conversion processing satisfying RLL (1, 7) as a run length rule. It is characterized by being.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the modulation data generation unit is configured to execute modulation recording frame generation processing including conversion processing of 2-bit information into 3-bit information. To do.

Furthermore, the second aspect of the present invention provides
An information reproduction processing device that executes reproduction processing of information stored in an information recording medium,
A data demodulator that performs demodulation processing of data read from the information recording medium;
An additional data recording area detecting unit for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding unit that acquires a DC control bit corresponding to an additional data configuration bit value included in the additional data setting recording frame, and executes processing for acquiring additional data information based on the acquired DC control bit;
The information reproduction processing apparatus is characterized by comprising:

  Furthermore, in one embodiment of the information reproduction processing device of the present invention, the additional data decoding unit stores a DC control bit corresponding to an additional data configuration bit value in a user control data storage frame part in an additional data setting recording frame. The present invention is characterized in that a process for identifying as a frame part is executed.

  Furthermore, in an embodiment of the information reproduction processing device of the present invention, the information reproduction processing device generates encryption key information and encryption key of content stored in the information recording medium based on the acquired additional data configuration bit information. The present invention is characterized in that a process for generating at least one of information, content reproduction control information, content copy control information, and a password is executed.

Furthermore, the third aspect of the present invention provides
An information recording medium,
Recording data based on a recording frame in which a DC control bit based on DSV measurement is set;
Recording data based on an additional data setting recording frame storing user control data in which the bit value is adjusted so that the DC control bit based on the DSV measurement has a bit value corresponding to the additional data configuration bit;
The information recording medium has a configuration in which is stored.

  Furthermore, in one embodiment of the information recording medium of the present invention, a frame part storing user control data in which the bit value in the additional data setting recording frame is stored, and a DC control bit having a bit value corresponding to the additional data configuration bit Are characterized by belonging to the same frame part.

  Furthermore, in one embodiment of the information recording medium of the present invention, the information recording medium uses the additional data as encryption key information, encryption key generation information, content reproduction control information, content copy control of content stored in the information recording medium. It is a configuration stored as configuration information of at least one of information and password.

  Furthermore, in one embodiment of the information recording medium of the present invention, the information recording medium is data based on a modulated recording frame generated by executing a data conversion process satisfying RLL (1, 7) as a run length rule. It is the structure which recorded.

  Furthermore, in one embodiment of the information recording medium of the present invention, the information recording medium is configured to record data based on a modulated recording frame generated by executing a process of converting 2-bit information into 3-bit information. It is characterized by that.

Furthermore, the fourth aspect of the present invention provides
Information recording processing method,
In the additional data setting recording frame, at least one or more DC control bits set in the additional data setting recording frame are set to a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on DSV measurement. A user control data control step for executing adjustment processing of user control data to be stored;
A modulation data generation step of performing modulation processing of the additional data setting recording frame including the user control data adjusted in the user control data control step, and generating a modulation recording frame as a recording unit;
An information recording processing method characterized by comprising:

  Furthermore, in one embodiment of the information recording processing method of the present invention, in the user control data control step, the DC control bit value of the frame part storing the user control data included in the additional data setting recording frame is an additional data component bit. User control data adjustment processing is performed so that the corresponding bit value is obtained.

  Furthermore, in one embodiment of the information recording processing method of the present invention, in the user control data control step, the DC control bit value set by the DSV measurement based on the original data of the additional data setting recording frame is converted into the additional data configuration bit. The additional data setting recording frame so that the DC control bit value becomes a bit value corresponding to the additional data configuration bit when it is determined that the DC control bit value is not compatible. It is characterized by including.

  Furthermore, in one embodiment of the information recording processing method of the present invention, the user control data control step divides a modulation recording frame of a frame part for setting a DC control bit corresponding to an additional data configuration bit into a plurality of data areas. It is a step of executing a process of determining an adjustment mode of the constituent bits of the user control data based on the DSV measurement value of the divided data area unit.

  Furthermore, in one embodiment of the information recording processing method of the present invention, in the information recording processing method, the additional data includes encryption key information of content stored in the information recording medium, encryption key generation information, content reproduction control information, It is the configuration information of at least one of content copy control information and password.

  Furthermore, in one embodiment of the information recording processing method of the present invention, the modulation data generation step generates a modulation recording frame by executing data conversion processing satisfying RLL (1, 7) as a run length rule. It is characterized by.

  Furthermore, in one embodiment of the information recording processing method of the present invention, the modulation data generation step is characterized in that a modulation recording frame generation process including a conversion process of 2-bit information into 3-bit information is executed.

Furthermore, the fifth aspect of the present invention provides
An information reproduction processing method for executing reproduction processing of information stored in an information recording medium,
A data demodulation step for performing demodulation processing of data read from the information recording medium;
An additional data recording area detecting step for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding step of acquiring a DC control bit corresponding to an additional data configuration bit value included in the additional data setting recording frame, and performing an acquisition process of the additional data information based on the acquired DC control bit;
An information reproduction processing method characterized by comprising:

  Furthermore, in one embodiment of the information reproduction processing method of the present invention, the additional data decoding step stores a user control data storage frame part in an additional data setting recording frame in which DC control bits corresponding to additional data configuration bit values are stored. The method includes a step of executing processing for identifying the frame part.

  Furthermore, in one embodiment of the information reproduction processing method of the present invention, the information reproduction processing method further includes: encryption key information of content stored in the information recording medium based on the acquired additional data configuration bit information, encryption The method includes a step of executing processing for generating at least one of key generation information, content reproduction control information, content copy control information, and a password.

Furthermore, the sixth aspect of the present invention provides
A computer program for executing information recording processing;
Additional data setting The additional data setting so that at least one DC control bit corresponding to additional data set in the recording frame is set to a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on DSV measurement. A user control data control step for executing adjustment processing of user control data stored in the recording frame;
A modulation data generation step of performing modulation processing of the additional data setting recording frame including the user control data adjusted in the user control data control step, and generating a modulation recording frame as a recording unit;
There is a computer program characterized by comprising:

Furthermore, the seventh aspect of the present invention provides
A computer program for executing reproduction processing of information stored in an information recording medium;
A data demodulation step for performing demodulation processing of data read from the information recording medium;
An additional data recording area detecting step for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding step of acquiring a DC control bit corresponding to the additional data configuration bit value included in the additional data setting recording frame, and performing an acquisition process of the additional data information based on the acquired DC control bit;
There is a computer program characterized by comprising:

  The computer program of the present invention is, for example, a storage medium or communication medium provided in a computer-readable format to a computer system capable of executing various program codes, such as a CD, FD, or MO. It is a computer program that can be provided by a recording medium or a communication medium such as a network. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the computer system.

  Other objects, features, and advantages of the present invention 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 present invention, additional data is stored by adjusting user control data (UCD) included in recording data for an information recording medium, and making DC control bits set corresponding to the adjusted data correspond to the additional data. It is a configuration. The DC control bit included in the recording data has a DC control bit value that is correctly set based on the DSV measurement result. Therefore, it is difficult to distinguish the DC control bit corresponding to the additional data from the other DC control bits, and it becomes possible to store the additional data with high analysis difficulty. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content reproduction control information, copy control information, and a password applied to content decryption processing in a manner that is difficult to analyze.

  Details of an information recording processing device, an information reproduction processing device, an information recording medium and method, and a computer program according to the present invention will be described below with reference to the drawings.

  First, the configuration and processing of the information recording processing apparatus of the present invention will be described with reference to FIG. The information recording processing apparatus described here includes a mastering apparatus as a master manufacturing apparatus called a so-called master disk, and further includes an information recording medium drive such as a DVD recording / reproducing apparatus or a PC that can be used by general users. Including the device. That is, it includes not only a master disk but also an information processing apparatus capable of writing data to various information recording media that are writable (recordable) and rewritable (rewritable).

  The configuration and processing of the information recording processing apparatus will be described with reference to FIG. The information recording processing apparatus includes an information recording medium 101 that can record data, a pickup 102 that outputs a data recording signal to the information recording medium 101, a spindle motor 103 that drives the information recording medium 101, a control of the pickup 102 and the spindle motor 103. Servo circuit 104, additional data error correction encoding unit 105, main data corresponding error correction encoding & interleaving processing unit 106, additional data recording area control unit 107, switch 108, modulation data generation unit 109, user control data (UCD) ) Control unit 110, recording signal processing circuit 111, user control data (UCD: User Control Data) compatible error correction encoding & interleaving processing unit 112, ECC cluster generation unit 113, main data encryption times With a 116.

  The modulation data generation unit 109 has a DC control bit generation unit 115 that executes DC control bit setting processing.

  Recording data to be recorded on the information recording medium 101 includes main data composed of actual data of reproduction target data such as content, user control data (UCD) including various control data such as reproduction control information, and additional data such as This is additional data such as key information, content reproduction control information, copy control information, and a password applied to content decryption processing. The additional data is stored in association with the bit value of a specific DC control bit among the DC control bits set when the modulation data is generated. The value of the DC control bit corresponding to the additional data is controlled by adjusting user control data (UCD), and is set to a bit value corresponding to the additional data.

  The user control data (UCD) control unit 110 uses a recording frame storing user control data as an additional data setting recording frame, and a DC control bit value based on DSV measurement set in the frame corresponds to an additional data configuration bit. The user control data adjustment process is executed so that the bit value is obtained. Details of these processes will be described later.

  The content data recorded on the information recording medium 101 is, for example, encrypted content data. The main data is encrypted with the encryption key in the main data encryption circuit 116. The main data encryption circuit 116 receives, for example, a 64-bit DES encryption key, a 128-bit AES encryption key, or a part of the configuration information, or a seed as encryption key generation information, and generates it based on the input information. Applying the encryption key, block encryption processing such as DES algorithm or AES algorithm is performed on main data such as content data to generate encrypted main data.

  The encrypted main data is input to the main data corresponding error correction encoding & interleaving processing unit 106. The main data corresponding error correction encoding & interleaving processing unit 106 generates an error correction code for the input data, performs encoding processing, and further performs interleaving processing. Details of these processes will be described later.

  The user control data (UCD) including various control data such as reproduction control information is also subjected to the UCD compatible error correction encoding & interleaving processing unit 112 so that an error correction code is generated and encoded, and the interleaving process is performed.

  Based on the interleaved main data and user control data, the ECC cluster generation unit 113 generates an ECC cluster, and the modulation data generation unit 109 executes modulation processing. The information recording processing apparatus according to the present invention performs modulation based on an RLL (1, 7) modulation method based on modulation of 2-bit data into 3-bit data.

  The modulation based on the RLL (1, 7) modulation method is a run length restriction of RLL (1, 7) in which the number of consecutive [0] is a minimum of 1 and a maximum of 7 in the bit after modulation. This is a data conversion method for making modulation data according to the above. In this conversion process, a conversion table is used. A specific use example of the conversion table will be described later.

  Based on the modulation data based on the RLL (1, 7) modulation method, a recording unit called a recording frame in which a synchronization signal is set is generated and recorded on the information recording medium 101 via the recording signal processing circuit 111. Is done.

  In the modulation process, “0” of the DC control bit (DC-Control bit) is set so that the absolute value of the DSV (Digital Sum Variation) at the time of modulation at every certain interval of the input main data becomes small. ”Or“ 1 ”is selected and inserted, and then modulation processing is performed.

  Digital sum variation (DSV) is an index of DC balance of an NRZI conversion signal generated as a recording signal for an information recording medium. Specifically, the bit [0] of the recording bit sequence (NRZI conversion signal) is set to “−1”, the bit [1] is set to “+1”, and the accumulated value is set as DSV, and the deviation from 0 of DSV is further reduced. In other words, after selecting and inserting “0” or “1” of a DC control bit (DC-Control bit), modulation processing is performed. Details of the NRZI conversion process will be described later.

  Details of the ECC cluster setting process and the modulation data generation process based on the main data and the user control data will be described with reference to FIGS. These processes are performed by the error correction encoding & interleaving processing unit 106 corresponding to the main data in FIG. 1, the error correction encoding & interleaving processing unit 112 corresponding to the user control data (UCD), the ECC cluster generation unit 113, the modulation data. This process is executed by the generation unit 109.

  The recording data includes user data 201 as main data and user control data (UCD: User Control data) 211 as shown in FIG. User data 201 corresponds to main data including entity data of reproduction target data such as content. User control data (UCD) 211 is data including various control data such as reproduction control information.

  User data 201 is set in units of 32 frames of 2048 byte data and 4 byte parity. User control data (UCD) 211 is composed of 32 units of 18-byte data.

  Based on the user data 201 of 32 frames × (2048 + 4) bytes, a data block 202 is formed. The data block 202 has an arrangement of 304 columns × 216 rows. One column (column) × one row (row) stores 1 byte (8 bit) data.

  An LDC block 203 is generated as a data block in which a parity of 32 rows (row) is added to each column for the data block 202, and an LDC cluster 204 of 152 columns × 496 rows is generated by interleaving for the LDC block 203. Is done.

  On the other hand, the user control data (UCD) 211 is combined with the physical address data 221 of 16 × 9 bytes to generate an access block 212 of 24 columns × 30 rows, and then the access block 212 is assigned to each column. A BIS block 213 is generated as a data block to which a parity of 32 rows (row) is added, and a BIS cluster 214 of 3 columns × 496 rows is generated by interleaving processing for the BIS block 213.

  3D is generated based on the same data as FIG. 2D, that is, based on the LDC cluster 204 of 152 columns × 496 rows generated based on the user data 201 and the user control data (UCD) 211. A BIS cluster 214 of 3 columns × 496 rows is shown.

  As shown in FIG. 3D, the LDC cluster 204 of 152 columns × 496 rows is divided into four parts (I to IV) in units of 38 columns, and a BIS cluster of 3 columns × 496 rows. 214 is divided into three parts (i to iii) in one column (column) unit, and these parts are alternately combined to form an ECC cluster 231 of 155 columns × 496 rows shown in FIG. Generated.

  Further, the ECC cluster 231 is set as a cluster 232 divided into 28 parts of 0 to 27 as shown in FIG. Only part 0 is 25 bits, and other parts 1 to 27 are 45 bits. Note that the number of bits shown in FIG. 3F is the number of bits per row.

  Further, as shown in FIG. 3 (g), 20 synchronization (Sync) bits are set, and 1-bit DC control bit (DC-control bit) is set between each of parts 0 to 27 in FIG. 3 (f). ) Is set.

  As a result, a physical cluster 233 of [1240 + 20 (Sync) + (1DC control × 28) = 1288] × 496 rows (row) is set. Each row of the physical cluster 233 is a recording frame 234 as a modulation data generation processing unit.

  The DC control bit is an index of DC balance of the NRZI conversion signal generated as a recording signal for the information recording medium. Specifically, the bit [0] of the recording bit sequence (NRZI conversion signal) is set to “−1”, the bit [1] is set to “+1”, and the accumulated value is set as DSV, and the deviation from 0 of DSV is further reduced. In other words, “0” or “1” of a DC control bit (DC-Control bit) is selected and inserted.

  Next, a modulation process for converting 2-bit data into 3-bit data is performed on the recording frame 234 composed of 1288-bit data. In this data conversion, RLL (1, 7) data conversion is performed to obtain modulated data in accordance with a run length restriction in which the number of consecutive [0] ranges from a minimum of 1 to a maximum of 7. A recording frame 235 is generated.

  The modulated recording frame 235 has a total of 1932 channel bits, which is 30 channel bits as modulated data bits (Sync) channel bits and (1288-20 sync bits) × 2/3 = 1902 channel bits.

  A conversion table is used for data modulation processing from 2 bits to 3 bits according to the run length rule of RLL (1, 7). An example of a specific conversion table is shown in FIG.

  As shown in FIG. 4, the conversion table is configured as a table in which modulation data bits corresponding to each input bit are associated. For example, when the input data is [00000000], the modulation data bit is [010100100100]. When the input data is [11], it is [000] if the preceding modulation data bit is [xx1], and [101] if the preceding modulation data bit is [xx0].

  By performing data conversion from 2 bits to 3 bits according to this table, modulated data bits according to the RLL (1, 7) run length rule are generated.

  Returning to FIG. 1, the description of the configuration and processing of the information recording processing apparatus of the present invention will be continued. In the modulation data generation unit 109 in FIG. 1, the modulation data generation processing described with reference to FIGS. 2 to 4 is executed, and a recording signal based on the generated modulation data is generated in the recording signal processing circuit 111.

  The recording signal processing circuit 111 generates an NRZI (Non Return to Zero Inverted) signal that inverts the polarity of the pulse according to the value [0] or [1] of the modulation data generated by the modulation data generation means 109. Is recorded on the information recording medium 101 as a recording signal.

  FIG. 5 shows an NRZI generation processing configuration as a recording signal executed in the recording signal processing circuit 111. Channel bits, which are modulation data bits output from the modulation data generation unit 109, are input to a recording signal processing circuit 111 including an NRZ conversion unit 121, an exclusive OR unit (XOR) 122, and a delay unit 123. 5A shows channel bits, FIG. 5B shows an output signal from the NRZ conversion means 121, and FIG. 5C shows an NRZI conversion pulse that is a recording signal as a final output of the recording signal processing circuit 111. This recording signal is output to the pickup 102 and recording information is recorded on the information recording medium 101 under the control of the servo circuit 104.

  In the configuration of the present invention, additional data, for example, key information applied to content decryption processing, content playback control information, copy control information, a password, and the like are stored in association with the value of the DC control bit set when the modulation data is generated. To do.

  In the configuration of the present invention, the user control data (UCD) in the vicinity of the DC control bit position set as the additional data-corresponding data bit is adjusted, and the correct DC control bit based on the DSV measurement for the adjusted data corresponds to the additional data. The configuration bit adjustment processing of the user control data (UCD) is performed so that the configuration bits become. Therefore, all the values of the DC control bits have the correct bit values set based on the DSV measurement, which increases the difficulty of analysis.

  The configuration shown in FIG. 1 is a schematic block diagram for explaining the configuration and processing of the information recording processing apparatus of the present invention. For example, UCD control for setting DC control bits to bit settings corresponding to additional data. The processing can be executed by a control unit such as a CPU executing a program describing a processing sequence or the like. Therefore, in the information recording processing apparatus of the present invention, the hardware shown in FIG. 1 and other hardware corresponding to each constituent element of the constituent blocks are not essential. Recording frame generation processing can be executed on hardware composed of a control unit for executing processing according to a predetermined program, a CPU as a data processing unit, and a memory as a storage unit for data, parameters, etc. It is.

  The additional data is, for example, encryption key information applied as an encryption key of content, information constituting a part of the data, or encryption key generation information such as data (for example, seed) necessary for generating the encryption key, content This is a data string such as [0, 0, 0, 1, 0, 0, 0...] That constitutes reproduction control information, content copy control information, secret information such as a password, and other content attribute information. This bit string is a bit string including the error correction code set in the additional data error correction encoding unit 105 for the additional data. In the configuration of the present invention, the bit information constituting this additional data bit string is stored in association with the DC control bit value in the vicinity of the user control data (UCD).

  The additional data setting configuration will be described below. FIG. 6 is a diagram showing details of the BIS block 213 and the BIS cluster 214 generated based on the user control data (UCD) 211 in the modulation data generation processing described with reference to FIGS.

  As described with reference to FIGS. 2 and 3, after the 16 × 9 byte physical address data 221 is combined with the user control data (UCD) 211 to generate an access block 212 of 24 columns × 30 rows. For the access block 212, a BIS block 213 is generated as a data block with 32 rows of parity added to each column. This is a BIS block 213 shown in FIG.

  The BIS cluster 214 of 3 columns × 496 rows is generated by the interleaving process for the BIS block 213. This is the BIS cluster shown in FIG.

  As shown in FIG. 6B, the BIS cluster includes three columns (columns) based on physical addresses of 3 rows, user control data (UCD) of 12 rows, and parity of 16 rows. ) × 31 rows (row), one unit is set. A BIS cluster 214 of 3 columns × 496 rows is configured by 16 units of units 0 to 15.

  FIG. 7 shows a detailed data storage configuration of user control data in the BIS block 213, and FIG. 8 shows a detailed data array of user control data in the BIS cluster 214.

  As shown in FIG. 7A1, the BIS block 213 includes 24 columns × 6 rows of physical addresses, 24 columns × 24 rows of user control data (UCD), and 24 columns × 32 rows of parity.

  As shown in FIG. 7 (A2), the user control data (UCD) of 24 columns × 24 rows is composed of 576 (24 × 24) pieces of UCD configuration data [UC0, 0] to 1-byte (8-bit) data. It is arranged as [UC17, 31]. Interleaving processing is performed on the BIS block 213 having such user control data (UCD) array of 24 columns × 24 rows, and a BIS cluster is generated.

  As shown in FIG. 8 (B1), the BIS cluster 214 has a configuration of 3 columns × 496 rows, has a physical address of 3 rows (row), user control data (UCD) of 12 rows (row), 16 One unit of 3 columns (column) × 31 rows (row) is set according to the parity of the row, and a BIS cluster 214 of 3 columns × 496 rows is constituted by 16 units of units 0 to 15.

  FIG. 8B2 shows user control data (UCD) of 3 columns × 12 rows of unit 0. In the user control data of unit 0, 36 (3 × 12) pieces of UCD configuration data [UC0, 12] to [UC4, 25] each consisting of 1 byte (8 bits) data are stored. The 16 units of units 0 to 15 each store 36 (3 × 12) UCD configuration data, and a total of 36 × 16 = 576 UCD configuration data is stored in the BIS cluster 214.

  The UCD configuration data stored in these BIS clusters 214 is distributed and arranged in the units 0 to 15 in the BIS cluster 214 by interleaving the configuration data of the user control data of the BIS block shown in FIG. 7 (A2). It has been done.

  User control data (UCD) is set as an area where various information such as content playback control information should be stored, but a part of it is set as a reserve area, and arbitrary data can be written. This is an important area.

  As shown in FIG. 9, the BIS cluster including user control data (UCD) is an LDC cluster 204 set based on user data such as contents as described above with reference to FIGS. An ECC cluster 231 is generated by inserting one column at a time between the four divided data I to IV.

  As shown in FIG. 9, the ECC cluster 231 is set as a cluster in which a BIS cluster of 3 columns (column) × 496 rows (row) is combined with an LDC cluster of 152 columns (column) × 496 rows (row).

  In the BIS cluster, as described with reference to FIG. 6 and others, any one of a physical address, user control data (UCD), and parity is set in each row. Accordingly, the BIS cluster (i, ii, iii) included in each of the 496 rows of the ECC cluster 231 is data of a physical address, user control data (UCD), or parity.

  As shown in a data frame 301, as shown in a data frame 301, user control data (UCD) is inserted into user data I to IV such as content in a specific row (row) constituting the ECC cluster 231 as shown in FIG. Frame is set.

  This user control data (UCD) insertion frame is set as a DC control bit storage frame corresponding to the additional data, ie, an additional data setting frame 301. The additional data setting frame 301 is a frame selected as a frame for storing DC control bits corresponding to constituent bits of additional data such as an encryption key.

  In the additional data setting frame 301, 20 synchronization (Sync) bits are set, and a DC control bit (DC-control bit) is set between each of the frame parts # 0 to # 27 each having a 45-bit configuration. ) Is set, and the additional data setting recording frame 302 is generated. This process corresponds to the process of FIGS. 3E to 3G described with reference to FIG.

  The setting position of the DC control bit corresponding to the constituent bits of the additional data such as the encryption key is a part of the frame parts # 0 to # 27. For example, the DC control bits set at the positions of the frame parts # 7, # 14, and # 21, which are the storage positions of user control data (UCD) that can be adjusted, are used as the storage positions of the bit information corresponding to the additional data.

  As shown in FIG. 10, the additional data setting frame 301 includes a BIS cluster (i, ii, iii) having 8-bit user control data (UCD) as configuration data. User control data (UCD) is the 8-bit UCD configuration data described above. Frame parts including the BIS cluster (i, ii, iii) are frame parts # 7, # 14, and # 21 of the additional data setting recording frame 302.

  In the present invention, the bit value of the user control data (UCD) near the DC control bit storage position corresponding to the additional data is adjusted, the correct DC control bit is set based on the DSV measurement for the adjusted data configuration, and the DC control is performed. The bit indicates the additional data configuration bit value. Therefore, all the values of the DC control bits have the correct bit values set based on the DSV measurement, which increases the difficulty of analysis.

  As described above, the DC control bit is an index of DC balance of the NRZI conversion signal generated as a recording signal for the information recording medium, and the bit [0] of the recording bit sequence (NRZI conversion signal) is set to “−1”. A value obtained by accumulating bits [1] as “+1” is set as DSV, and “0” or “1” of a DC control bit (DC-Control bit) is set so that the deviation from DSV can be further reduced. Select to insert.

  A frame part that stores a DC control bit corresponding to a configuration bit of additional data, that is, at least one of frame parts # 7, # 14, and # 21 that stores user control data (UCD) whose data can be changed is a DC corresponding to additional data. The control bit storage position is selected and the DC control bit set based on the DSV measurement is adjusted by adjusting the user control data (UCD) in the vicinity of the DC control bit storage position corresponding to the additional data. It is controlled to have a bit value corresponding to.

  A detailed configuration of the additional data setting recording frame 302 will be described with reference to FIG.

  As shown in FIG. 11A, the additional data setting recording frame 302 includes one DC control bit (DC-control bit) in frame parts # 0 to # 27 each having a structure divided into 45 bits. Has a set frame structure.

  The storage positions of user control data (UCD) included in the BIS cluster (i, ii, iii) are set as the positions of frame parts # 7, # 14, and # 21. Detailed configurations of frame parts # 7, # 14, and # 21 are shown in FIGS.

The frame part # 7 stores user control data (UCD) 351 as shown in FIG.
User data as main data: 9 bits,
User control data (UCD): 8 bits
User data as main data: 28 bits,
For a total of 45 bits,
DC control bit: 1 bit is set.

Frame part # 14 stores user control data (UCD) 352, as shown in FIG.
User data as main data: 6 bits,
User control data (UCD): 8 bits
User data as main data: 31 bits
For a total of 45 bits,
DC control bit: 1 bit is set.

The frame part # 21 stores user control data (UCD) 353 as shown in FIG.
User data as main data: 3 bits,
User control data (UCD): 8 bits
User data as main data: 34 bits
For a total of 45 bits,
DC control bit: 1 bit is set.

  The other frame parts do not include user control data (UCD), and are set as frame parts including only user data as main data, synchronization (Sync) bits, and DC control bits.

  As described with reference to FIG. 7 and FIG. 8, the user control data (UCD) is 576 (24 × 24) pieces of UCD configuration data [UC0, 0] to [UC17 each consisting of 1 byte (8 bits) data. , 31], and is set as an area for storing various types of information such as content playback control information. A part of the information is set as a reserve area, and arbitrary data can be written therein. It is an area.

  A recording frame including user control data (UCD) in which arbitrary data can be written is set as an additional data setting recording frame 302, and a user control data (UCD) storage frame part # 7 included in the additional data setting recording frame 302 is set. The DC control bit of at least one of # 14 and # 21 is set as a bit value corresponding to additional data.

  For example, when only the frame part # 14 is a storage part for the additional data configuration bit value, the frame part # 14 is set so that the DC control bit value of the frame part # 14 is a value corresponding to the additional data configuration bit value. User control data (UCD) 8-bit bit value adjustment processing is executed.

  Also, it is possible to set all the frame parts # 7, # 14, and # 21 as the storage frame parts for the additional data configuration bit values. In this case, the frame parts are set to the frame parts # 7, # 14, and # 21, respectively. 8 bits of user control data (UCD) stored in frame parts # 7, # 14, and # 21 so that the value of the DC control bit based on the DSV measurement becomes a value corresponding to the additional data configuration bit value. Adjust each value.

  The DC control bit value based on the DSV measurement set in the frame part for storing the user control data included in the additional data setting recording frame by the user control data (UCD) control unit 110 shown in FIG. User control data adjustment processing is executed so that the corresponding bit value is obtained.

  As described above, the DC control bit is an index of DC balance of the NRZI conversion signal generated as a recording signal for the information recording medium, and the bit [0] of the recording bit sequence (NRZI conversion signal) is set to “−1”. The value accumulated by setting bit [1] to “+1” is set as DSV, and DSV is set based on DSV measurement so that the deviation from 0 can be made smaller. In the present invention, The 8-bit bit value adjustment process of the user control data (UCD) is executed so that the DC control bit set based on the DSV measurement becomes a bit value corresponding to the additional data.

  For example, at least one of the user control data (UCD) storage frame parts (# 7, # 14, # 21) in the additional data setting recording frame 302 is set as the DC control bit setting position corresponding to the additional data constituent bits, and the frame part is set. The user control data (UCD) is adjusted, and the DC control bit set when the DC control bit setting process based on the DSV measurement is performed is adjusted to a value corresponding to the bit value corresponding to the additional data. .

  Details of the control processing of the DC control bit based on the bit value adjustment of the user control data (UCD) will be described with reference to FIGS.

  FIGS. 12 and 13 show, as an example, processing when the frame part # 14 of the additional data setting recording frame is a frame part for setting a DC control bit corresponding to the additional data configuration bit. The processing of other frame parts is performed in the same manner.

FIG. 12A shows the configuration of frame part # 14 of the additional data setting recording frame.
User data as main data: 6 bits,
User control data (UCD): 8 bits
User data as main data: 31 bits
For a total of 45 bits,
DC control bit: 1 bit is set.

  FIG. 12B shows a specific bit configuration example (0100100...) Of frame part # 14 of the additional data setting recording frame. The last 1 bit is a DC control bit set as a result of the DSV measurement based on the modulation data, and in this example, the DC control bit [1] is set.

  A value (0100000100...) In FIG. 12C indicates a modulated data bit string obtained as a result of the modulation processing of the bit value in (b). This modulated data bit string is obtained as a result of conversion from 2 bits to 3 bits based on the conversion table described above with reference to FIG. 4, that is, modulation processing according to the RLL (1, 7) run length rule. This is a modulated data bit string.

  The DSV, which is used as an index for determining the set value of the DC control bit, changes its polarity when [1] appears in the modulated data bit string shown in (c), and the integrated value of the high region and the low (Low) ) It can be measured as a value corresponding to the difference value of the integrated value of the area.

  For example, in the divided data area a (9 bits) of the modulated data bit string in FIG. 12C, the high area is 5 bits from the second bit to the sixth bit, and the low area is The first bit and 3 bits from the 7th to the 9th bit are 4 bits in total. The high area is (+) and the low area is (-). Then, (+5) + (− 4) = + 1 is calculated, and (+1) is set to DSV [A] = + 1 in the partitioned data area a (9 bits).

  Similarly, DSV [B] =-2 in the data area b of the modulated data bit string, DSV [C] = + 6 in the data area c of the modulated data bit string, and DSV [D] =-4 in the data area d of the modulated data bit string. is there.

In addition, DSV [A], [B], [C], [D] in the division data area in FIG.
(1) DSV [A] = DSV in the partitioned data area a before the modulation processing unit including UCD
(2) DSV [B] = DSV of the divided data area b of the modulation processing unit part including UCD
(3) DSV [C] = DSV corresponding to the partitioned data area c up to the modulation processing unit including the DC control bit after the partitioned data area b
(4) DSV [D] = DSV of the divided data area d of the modulation processing unit part including the DC control bit
It is. If the condition that the divided data area d includes a DC control bit is satisfied and a boundary based on a modulation processing unit (modulation unit) is set, the boundary between the divided data area c and the divided data area d is arbitrary. Can be set.

The total DSV of frame part # 14 of this additional data setting recording frame is the sum of DSV [A] to [D].
Total DSV = + 1-2 + 6-4 = + 1
It is.

  In the specific bit configuration of frame part # 14 of the additional data setting recording frame shown in FIG. 12B, the DC control bit based on DSV measurement is set to [1]. The DC control bit [1] is a correct DC control bit set based on the DSV measurement of the recording bit sequence (NRZI converted signal) generated based on the modulated data bit string shown in FIG.

  When the additional data configuration bit = [1], it matches the DC control bit [1]. Therefore, the configuration bits of the user control data (UCD) in this frame part, that is, the UCD8 shown in FIG. There is no need to adjust the bit (00000000).

  However, when the additional data configuration bit = [0], it does not match the DC control bit [1] of the original data, so that the user control data (UCD), which is a rewritable data area in the frame part # 14. ) Is changed, and adjustment processing is performed so that the DC control bit set based on the DSV measurement becomes [0].

  That is, based on the DSV measurement of the recording bit sequence (NRZI converted signal) generated based on the modulated data bit sequence set corresponding to the changed data by changing the UCD 8 bits (00000000) shown in FIG. The UCD is changed so that the DC control bit is set to [0].

  The user control data (UCD) changing process for adjusting the DC control bit value will be described with reference to FIG.

  The frame part (1) shown in the center of FIG. 13 shows the configuration of the frame part # 14 of the additional data setting recording frame, as shown in FIG.

  Here, it is assumed that the original bit configuration of the user control data (UCD) is all zero (00000000) as shown in FIG. The UCD8 bit is changed to (10000000), for example.

  The data structure when the DC control bit of the frame part # 14 in which the UCD bit value has been changed is set to [0] is shown in (a1) in the upper part of FIG. 13, and the case where the DC control bit is set to [1] This is shown in (b1) at the bottom of FIG. These DC control bits do not define bit values based on DSV measurement, but are two frames in which different DC control bits are intentionally set for comparison processing.

  FIG. 13A shows the DSV measurement value calculation result when setting (a1) in the upper part of FIG. 13, that is, when the DC control bit = [0]. (B2) shows the DSV measurement value calculation result when setting (b1) in the lower stage, that is, when the DC control bit = [1].

The DSV measurement value calculation result when the DC control bit = [0] is as shown in (a2),
Total DSV
= [A] + [B] + [C] + [D]
= + 1 + 4-6 + 2
= +1
And
The DSV measurement value calculation result when the DC control bit = [1] is as shown in (b2),
Total DSV
= [A] + [B] + [C] + [D] '
= + 1 + 4-6 + 4
= +3
It becomes.

  As described above, the value of the DC control bit is selected so that the absolute value of DSV is close to zero. Therefore, in the data configuration shown in FIG. 13, that is, the data configuration in which the user control data is changed to (10000000), the total DSV measurement value calculation result when DC control bit = [0] = + 1, DC control bit = Since the total DSV measurement value calculation result in the case of [1] = + 3, the DC control bit set based on the DSV measurement result is [0].

Therefore, a frame part having a bit pattern as shown in FIG.
Original UCD = (00000000)
When the original DC control bit = [1],
To set the DC control bit to [0] along with the additional data,
Original UCD = (00000000)
It can be said that the process of changing to UCD = (10000000) is effective.

  A specific user control data (UCD) change processing sequence will be described with reference to the flowchart shown in FIG. The user control data adjustment process according to the process sequence shown in FIG. 14 is executed by the user control data (UCD) control unit 110 shown in FIG. The user control data (UCD) control unit 110 has a bit value corresponding to an additional data configuration bit based on a DC control bit value based on DSV measurement set in a frame part that stores user control data included in an additional data setting recording frame. The UCD adjustment process is executed so that

  The additional data recording area control unit 107 shown in FIG. 1 detects the additional data setting recording frame, turns the switch 108 to the user control data (UCD) control unit 110 side, and the data modulated by the modulation data generation unit 109 performs UCD control. Input to the unit 110. The UCD control unit 110 determines whether the configuration bits of the additional data input from the additional data error correction encoding unit 105 match the DC control bits in the additional data setting recording frame. After adjusting and selecting the data, the selected user control data is transmitted to the UCD compatible error correction encoding & interleaving processing unit 112 and changed. The ECC cluster including the changed user control data is processed again by the ECC cluster generation unit 113 and the modulation data generation unit 109, and a recording frame having a DC control bit that matches the configuration bit of the additional data is included in the additional data setting recording frame. Generated. Thereafter, the signal is input to the recording signal processing circuit 111 via the switch 108 and recorded on the disk.

  FIG. 14 is an adjustment processing sequence of user control data (UCD) included in any one of the UCD storage frame parts of the additional data setting recording frame, for example, frame parts # 7, # 14, and # 21. It is a flowchart explaining the UCD adjustment process sequence for making a DC control bit value correspond with the value of a data structure bit.

  That is, in the frame part in which the original user control data (UCD) is set, when the original DC control bit set based on the DSV measurement does not match the configuration bit of the additional data, the configuration of the user control data (UCD) The bit is changed, and the DC control bit set as a result of the DSV measurement based on the changed data has a polarity (bit value) different from that of the original DC control bit, that is, the same polarity (bit value) as the constituent bits of the additional data It is a processing sequence for setting to.

In particular,
a. When the additional data configuration bit = [1] and the original DC control bit = [0], the configuration bit of the user control data (UCD) is changed, and the DC control bit set by the DSV measurement based on the changed data Change the UCD so that becomes [1].
b. When the additional data configuration bit = [0] and the original DC control bit = [1], the configuration bit of the user control data (UCD) is changed, and the DC control bit set by the DSV measurement based on the changed data Change the UCD so that becomes [0].

  This is the processing of the above two aspects. When the additional data configuration bit = the original DC control bit, it is not necessary to change the configuration bit of the user control data (UCD), and the processing flow shown in FIG. 14 is not executed.

First, in step S101, DSV measurement of each divided data area of the UCD storage frame part of the additional data setting recording frame, parity check of the original UCD, and the like are performed. Specifically, the following six processes are executed.
1. The DSV of the partitioned data area a up to the modulation processing unit including the UCD is calculated, and this is defined as [A].
2. The DSV of the divided data area b of the modulation processing unit part including the UCD is calculated, and this is defined as [B].
3. The DSV of the partitioned data area c up to the modulation processing unit including the DC control bits after the partitioned data area b is calculated, and this is defined as [C].
4). The DSV of the divided data area d of the modulation processing unit part including the original DC control bit based on the original UCD is calculated, and this is defined as [D].
5). The DSV of the divided data area d having the polarity inversion DC control bit set by inverting the polarity of the original DC control bit is calculated, and this is defined as [Drev].
6). The parity of the current UCD (original UCD) is confirmed and set as parity a.

  Note that the parity is equal when the number of [1] in the 8 bits of the UCD is an even number: parity a = EVEN, and when the number of [1] is an odd number: parity a = ODD.

  When the processes 1 to 6 described above are completed in step S101, it is next determined in step S102 whether the parity a of the current UCD (original UCD) confirmed in step S101 is EVEN.

  When the parity a = EVEN, the process proceeds to step S103, and when the parity a = ODD, the process proceeds to step S104.

If parity a = EVEN, the DSV absolute value comparison between 4 and 5 is executed in step S103. That is, as described in step S101. The absolute value | [D] | of the DSV [D] of the partitioned data area d of the modulation processing unit part including the original DC control bits based on the original UCD;
5). The polarity of the original DC control bit is inverted and compared with the absolute value | [Drev] | of the DSV [Drev] of the divided data area d having the temporarily set polarity inversion DC control bit.

If it is determined in step S103 that | [D] |> | [Drev] | is Yes, the process proceeds to step S105. In step S105, the following UCD adjustment processing is executed.
If the parity of the current UCD or adjustment UCD = EVEN:
[B] ≈-([A] + [C])
When parity of current UCD or adjusted UCD = ODD [B] ≈ − ([A] − [C])
An adjustment UCD that satisfies the following condition is set.

  Initially, since step S105 is executed based on the determination in step S102, the parity of the current UCD = EVEN and the condition [B] ≈ − ([A] + [C]) is satisfied. Next adjustment UCD is set. That is, the bit value of the user control data (UCD) is changed so that the divided data area b of the modulation processing unit including the UCD has a DSV value “B” ≈ − ([A] + [C]). The primary adjustment UCD is set.

  Next, in step S109, provisional modulation processing is performed on the recording frame having the first-order adjustment UCD to perform provisional setting of the DC control bit based on the DSV measurement, and DC control in which the polarity is reversed from the original DC control bit. A verification process is performed to determine whether the bit is set.

  If it is determined in step S113 that the original DC control bit and the DC control bit whose polarity has been inverted are set, the adjustment UCD set at that time is set as the final writing UCD, and the process is terminated. If it is determined in step S113 that the original DC control bit and the DC control bit whose polarity is inverted are not set, that is, the original DC control bit remains set, the process returns to step S105 to perform the primary adjustment. Parity verification is performed again for the UCD, and the second adjustment UCD is set.

  When the DC control bit whose polarity is inverted from that of the original DC control bit, that is, the DC control bit that matches the bit value of the additional data configuration bit, is set by this repeated processing, the adjustment UCD is set as the final writing UCD and the processing is ended. .

If the determination in step S103, that is, if | [D] |> | [Drev] | is determined No, the process proceeds to step S106. In step S106, the following UCD adjustment processing is executed.
If the parity of the current UCD or adjustment UCD = EVEN:
[B] ≈ − ([A] + [C] + [Drev])
When parity of current UCD or adjusted UCD = ODD [B] ≈ − ([A] − [C] − [Drev])
An adjustment UCD that satisfies the following condition is set.

  Initially, since step S106 is executed based on the determination in step S102, the parity of the current UCD = EVEN, and the condition [B] ≈ − ([A] + [C] + [Drev]) is satisfied. A satisfactory primary adjustment UCD is set. That is, the bit value of the user control data (UCD) so that the divided data area b of the modulation processing unit including the UCD has a DSV value “B” ≈ − ([A] + [C] + [Drev]). And the first adjustment UCD is set.

  Next, in step S110, provisional modulation processing is executed on the recording frame having the first-order adjustment UCD to perform provisional setting of the DC control bit based on the DSV measurement, and DC control with the polarity reversed from that of the original DC control bit. A verification process is performed to determine whether the bit is set.

  If it is determined in step S114 that the original DC control bit and the DC control bit whose polarity is inverted have been set, the adjustment UCD set at that time is set as the final writing UCD, and the process is terminated. If it is determined in step S114 that the original DC control bit and the DC control bit whose polarity is inverted are not set, that is, the original DC control bit remains set, the process returns to step S106 to perform the primary adjustment. Parity verification is performed again for the UCD, and the second adjustment UCD is set.

  When the DC control bit whose polarity is inverted from that of the original DC control bit, that is, the DC control bit that matches the bit value of the additional data configuration bit, is set by this repeated processing, the adjustment UCD is set as the final writing UCD and the processing is ended. .

If it is determined in step S102 that the current UCD parity a = ODD, the process proceeds to step S104, and in step S104, the same determination process as in step S103 is executed, that is, as described in step S101. The absolute value | [D] | of the DSV [D] of the partitioned data area d of the modulation processing unit part including the original DC control bits based on the original UCD;
5). The polarity of the original DC control bit is inverted and compared with the absolute value | [Drev] | of the DSV [Drev] of the divided data area d having the temporarily set polarity inversion DC control bit.

If the determination in step S104, that is, if | [D] |> | [Drev] | is determined to be Yes, the process proceeds to step S107. In step S107, the following UCD adjustment processing is executed.
If the parity of the current UCD or adjustment UCD = ODD,
[B] ≈-([A] + [C])
When parity of current UCD or adjustment UCD = EVEN [B] ≈ − ([A] − [C])
An adjustment UCD that satisfies the following condition is set.

  Initially, step S107 is executed based on the determination in step S102, so that the parity of the current UCD = ODD and the condition [B] ≈ − ([A] + [C]) is satisfied. Next adjustment UCD is set. That is, the bit value of the user control data (UCD) is changed so that the divided data area b of the modulation processing unit including the UCD has a DSV value “B” ≈ − ([A] + [C]). The primary adjustment UCD is set.

  Next, in step S111, provisional modulation processing is executed on the recording frame having the first-order adjustment UCD to perform provisional setting of the DC control bit based on the DSV measurement, and DC control in which the polarity is reversed from the original DC control bit. A verification process is performed to determine whether the bit is set.

  If it is determined in step S115 that the original DC control bit and the DC control bit whose polarity is inverted have been set, the adjustment UCD set at that time is set as the final writing UCD, and the process is terminated. If it is determined in step S115 that the DC control bit whose polarity is inverted from that of the original DC control bit is not set, that is, the original DC control bit remains set, the process returns to step S107 to perform the primary adjustment. Parity verification is performed again for the UCD, and the second adjustment UCD is set.

  When the DC control bit whose polarity is inverted from that of the original DC control bit, that is, the DC control bit that matches the bit value of the additional data configuration bit, is set by this repeated processing, the adjustment UCD is set as the final writing UCD and the processing is ended. .

If the determination in step S104, that is, if | [D] |> | [Drev] | is determined No, the process proceeds to step S108. In step S108, the following UCD adjustment processing is executed.
If the parity of the current UCD or adjustment UCD = ODD,
[B] ≈ − ([A] + [C] + [Drev])
When parity of current UCD or adjustment UCD = EVEN [B] ≈ − ([A] − [C] − [Drev])
An adjustment UCD that satisfies the following condition is set.

  Initially, since step S108 is executed by the determination in step S102, the parity of the current UCD = ODD, and the condition [B] ≈ − ([A] + [C] + [Drev]) is satisfied. A satisfactory primary adjustment UCD is set. That is, the bit value of the user control data (UCD) so that the divided data area b of the modulation processing unit including the UCD has a DSV value “B” ≈ − ([A] + [C] + [Drev]). And the first adjustment UCD is set.

  Next, in step S112, provisional modulation processing is performed on the recording frame having the first-order adjustment UCD to perform provisional setting of the DC control bit based on the DSV measurement, and DC control in which the polarity is reversed from the original DC control bit. A verification process is performed to determine whether the bit is set.

  If it is determined in step S116 that the original DC control bit and the DC control bit whose polarity is inverted are set, the adjustment UCD set at that time is set as the final write UCD, and the process is terminated. If it is determined in step S116 that the DC control bit whose polarity is reversed from that of the original DC control bit is not set, that is, the original DC control bit remains set, the process returns to step S108 to perform the primary adjustment. Parity verification is performed again for the UCD, and the second adjustment UCD is set.

  When the DC control bit whose polarity is inverted from that of the original DC control bit, that is, the DC control bit that matches the bit value of the additional data configuration bit, is set by this repeated processing, the adjustment UCD is set as the final writing UCD and the processing is ended. .

  As described above, according to the processing flow shown in FIG. 14, the user control (UCD) included in the additional data corresponding DC control bit storage frame part in the recording frame is adjusted, and the DC control bit corresponding to the constituent bits of the additional data is set. Is done.

  With reference to FIG. 15 and FIG. 16, the mode of adjustment processing based on the correspondence between the bit value of the additional data configuration bit and the value of the original DC control bit in the additional data setting recording frame will be described.

  FIG. 15 shows the adjustment processing when the additional data configuration bit = [0]. Here, an example is shown in which the frame part # 14 in the additional data setting recording frame is a frame part for setting a DC control bit corresponding to the additional data.

  FIG. 15A shows processing when the DC control bit based on the DSV measurement set in the frame part # 14 in the original recording frame 361 before adjustment is [1]. In this case, since the value [1] different from the additional data configuration bit = [0] is set as the DC control bit, it is necessary to change the UCD stored in the frame part # 14. The change process is executed according to the sequence described with reference to FIG.

  As a result, an additional data setting recording frame 362 in which the UCD is changed is generated, and the DC control bit based on the DSV measurement of the frame part # 14 is set as [0]. In this way, a recording frame having a DC control bit [0] that matches the additional data configuration bit [0] is generated, and a modulation process and a recording signal generation process based on the additional data setting recording frame 362 are performed, and the disc is recorded. To be recorded.

  FIG. 15B shows processing when the DC control bit based on the DSV measurement set in frame part # 14 in the original recording frame 371 before adjustment is [0]. In this case, since the additional data configuration bit = DC control bit, it is not necessary to change the UCD stored in the frame part # 14. An additional data setting recording frame 372 that does not change the UCD is generated, and modulation processing and recording signal generation processing are performed based on the additional data setting recording frame 372 having a DC control bit [0] that matches the additional data configuration bit [0]. Recorded on the disc.

  FIG. 16 shows the adjustment processing when the additional data configuration bit = [1]. FIG. 16A shows processing when the DC control bit based on the DSV measurement set in the frame part # 14 in the original recording frame 381 before adjustment is [1]. In this case, since the additional data configuration bit = DC control bit, it is not necessary to change the UCD stored in the frame part # 14. An additional data setting recording frame 382 that does not change the UCD is generated, and a modulation process and a recording signal generation process are performed based on the additional data setting recording frame 382 having the DC control bit [1] that matches the additional data configuration bit [1]. Recorded on the disc.

  FIG. 16B shows processing when the DC control bit based on the DSV measurement set in the frame part # 14 in the original recording frame 391 before adjustment is [0]. In this case, since the value [0] different from the additional data configuration bit = [1] is set as the DC control bit, it is necessary to change the UCD stored in the frame part # 14. The change process is executed according to the sequence described with reference to FIG.

  As a result, an additional data setting recording frame 392 in which the UCD is changed is generated, and the DC control bit based on the DSV measurement of the frame part # 14 is set as [1]. In this way, a recording frame having a DC control bit [1] that matches the additional data configuration bit [1] is generated, and a modulation process and a recording signal generation process based on the additional data setting recording frame 392 are performed, and the disc is recorded. To be recorded.

  Next, a recording process sequence of additional data on a recording medium to which a DC control bit by UCD adjustment executed in the information recording processing apparatus of the present invention is applied will be described with reference to FIG.

  In step S201, additional data after error correction coding is input. This is data acquired as output data from the additional data error correction encoding unit 105 shown in FIG. Note that the additional data is encryption key generation information such as encryption key information to be applied as a content encryption key, information constituting a part of the data, or data (for example, seed) required to generate the encryption key, and the like. , Content playback control information, content copy control information, secret information such as passwords, and other content attribute information, etc., and data composed of various information, such as additional data to which an error correction code is added. A bit string, for example, a data string such as [0, 0, 0, 1, 0, 0, 0.

  In step S202, one bit is taken out as a recording bit in order from a constituent bit string of additional data, for example, [0, 0, 0, 1, 0, 0, 0.

  In step S203, modulation processing of the additional data setting recording frame is performed, and DC control bit information set based on the DSV measurement is acquired. Note that the DC control bit information acquired here is bit information of the DC control bit position corresponding to the additional data of the additional data setting recording frame. As described above, for example, when the DC control bit information at any position of the user control data (UCD) storage frame part # 7, # 14, # 21 in the recording frame is set as the DC control bit corresponding to the additional data The DC control bit information of the frame part is acquired.

In step S204, it is determined whether or not the configuration bit of the additional data acquired in step S202 matches the additional data corresponding DC control bit set in the additional data setting recording frame acquired in step S203. That is,
It is determined whether or not the additional data component bit = DC control bit corresponding to additional data is satisfied.

If the additional data component bit = additional data-corresponding DC control bit is established, the process proceeds to step S205 to execute the recording frame modulation process without changing the additional data setting recording frame user control data (UCD). .

If the additional data component bit = additional data corresponding DC control bit does not hold, the process proceeds to step S206, where the user control data (UCD) included in the frame part having the additional data corresponding DC control bit is changed, and step S207 is executed. , Provisional modulation processing is performed, DC control bit setting processing based on DSV measurement is performed, the bit value of the DC control bit corresponding to additional data is acquired, and the process returns to step S204, and the acquired DC control bit value is extracted as additional data. It is determined whether or not the bit matches. The processes of steps S206 → S207 → S204 are repeatedly executed until they match. This process corresponds to the UCD adjustment process described above with reference to FIG.

  When the additional data configuration bit = DC control bit is finally established, the process proceeds to step S205, and modulation processing of the additional data setting recording frame having the adjusted UCD is executed.

  In step S208, it is determined whether or not the processing of the last bit of the additional data has been completed. If there is unprocessed data, the processing in step S202 and subsequent steps is repeatedly executed.

  In step S208, the determination is made that there is no unprocessed data, and the processing ends, that is, recording data into which additional information bits are inserted is generated according to the processing described above.

  Note that. In the above-described embodiment, the frame part that stores the user control data (UCD) of the additional data setting recording frame and the frame part that stores the DC control bit corresponding to the constituent bits of the additional data are set as the same frame part. Although the example has been described, the frame part for storing the user control data (UCD) of the additional data setting recording frame and the storage frame part for the DC control bit having the corresponding value of the constituent bits of the additional data are set as different frame parts. Also good.

  That is, user control data stored in another frame part of the additional data setting recording frame so that at least one or more DC control bits set in the additional data setting recording frame have a bit value corresponding to the additional data configuration bit. The data adjustment process may be executed. This adjustment process is executed by the user control data control unit 110 that inputs the DC control bit information of the additional data setting recording frame.

  Next, the configuration and playback processing sequence of an information playback processing apparatus that performs playback processing of an information recording medium that stores the above-described additional data and content (main data) such as movies and music will be described.

  With reference to FIG. 18, the configuration and processing of the information reproduction processing apparatus will be described. The information reproduction processing apparatus includes an information recording medium 401, a pickup 402 that reads data from the information recording medium 401, a spindle motor 403 that drives the information recording medium 401, a servo circuit 404 that controls the pickup 402 and the spindle motor 403, reading An RF circuit unit 405 that performs signal processing such as signal gain adjustment to generate an RF signal, a synchronization detection unit 406 that extracts a synchronization signal from the RF signal, a data demodulation processing unit 407 that performs data demodulation processing, and an additional data area Only, the switch 410 for outputting the read signal of the information recording medium to the additional data decoding unit 408, the area of the additional data is detected, the additional data recording area detecting unit 411 for controlling the switch 410, and the additional data decoding process are executed. Additional data decoding unit 4 8. Data division unit 412 that divides main data and user control data (UCD) based on the demodulated data output from the data demodulation processing unit 407, error correction and main data corresponding error correction and deinterleaving processing for main data Deinterleave processing unit 413, user control data (UCD) error correction and deinterleave processing unit 414 that performs user control data (UCD) error correction and deinterleave processing, and additional data error correction unit that performs error correction processing of additional data 409.

  The content data stored in the information recording medium 401 is, for example, encrypted content data, and the additional data stored in the information recording medium 401 is key information or key generation information applied to decryption processing of the encrypted content, Alternatively, content reproduction control information, content copy control information, secret information such as a password, and other content attribute information.

  Data read from the information recording medium 401 via the pickup 402 is subjected to signal processing such as gain adjustment in the RF circuit unit 405 and input to the synchronization detection unit 406. The synchronization detection unit 406 detects a synchronization signal (sync) in the recording signal and outputs the detection signal to the additional data recording area control unit 411.

  The additional data recording area control unit 411 determines the additional data recording area based on the synchronization signal input from the synchronization detection unit 406 and controls the switch 410 based on the determination information. By this switch control, the additional data decoding unit 408 that performs the decoding process of the additional data has a recording frame in an area necessary for decoding the additional data, that is, an additional data setting recording frame in which DC control bit information based on the additional data is set. Is input from the data demodulation processing unit 407.

  The additional data decoding unit 408 executes a decoding process for acquiring additional data based on the additional data setting recording frame input from the data demodulation processing unit 407. That is, DC control bit information corresponding to the additional data is detected from the additional data setting recording frame, and the constituent bits of the additional data are determined based on the detected DC control bit value.

  That is, the setting position of the additional data corresponding DC control bit of the additional data setting recording frame, for example, the value of the DC control bit at any one of the frame parts # 7, # 14, and # 21 in which the user control data (UCD) is stored. And the configuration bits of the additional data, for example, [0] or [1] are determined based on these pieces of information.

  The additional data decoding unit 408 has frame part information in which user control data (UCD) is stored in advance, or acquires it from information stored in an information recording medium, and acquires a specific frame part based on the acquired information. The additional data setting is selected from the recording frame, and the DC control bit information set in the selected frame part is acquired as additional data configuration bit information.

  As described above, in the playback apparatus, when the data processed in the data demodulation processing unit 407 is an additional data setting recording frame, the frame data is input to the additional data decoding unit 408 via the switch 410 and the additional data decoding is performed. The unit 408 executes processing for acquiring the DC control bit at the set position of the DC control bit corresponding to the additional data of the additional data setting recording frame, and determining the constituent bits of the additional data based on these pieces of information. For example, the additional data recording area detection unit 411 identifies a recording frame storing user control data as an additional data setting recording frame, and controls the switch 410.

  The additional data decoding unit 408 performs the same processing based on the recording frame in which the additional data input intermittently is set, for example, key information of n-bit information, key generation information, or content reproduction control information Additional data such as content copy control information, password, and other content attribute information is acquired. As described in the description of the information recording processing apparatus, this additional data includes an error correction code, and is output after error correction is performed by the additional data error correction unit 409.

  When the additional data is, for example, key information applied to content decryption, the output destination of the additional data is a decryption processing unit that executes content decryption processing. In the case of content reproduction control information, it becomes a reproduction control unit.

  On the other hand, as for general data other than the additional data, read data of the information recording medium is output from the synchronization detection unit 406 to the data demodulation unit 407, and the reverse data conversion described above with reference to FIGS. The playback data is acquired.

  The data dividing unit 412 divides main data and user control data (UCD) based on the demodulated data output from the data demodulation processing unit 407, and the main data is processed by the main data corresponding error correction & deinterleave processing unit 413. Error correction and deinterleaving are performed. The user control data (UCD) is output after being subjected to error correction and deinterleaving in a user control data (UCD) compatible error correction & deinterleave processing unit 414.

  When the output main data is, for example, encrypted content, decryption processing using an encryption key that can be generated based on key generation information output as additional data is performed, and then output means such as a display and a speaker are Is output via.

  The configuration shown in FIG. 18 is a schematic block diagram for explaining the configuration and processing of the information reproduction processing apparatus of the present invention. For example, acquisition of additional data setting recording frames, acquisition of additional data, and analysis processing are performed. It can be executed when a control unit such as a CPU executes a program describing a processing sequence or the like. Accordingly, in the information reproduction processing apparatus of the present invention, the hardware shown in FIG. 18 and other hardware corresponding to the individual components of the structural blocks are not essential. Additional data acquisition and reproduction processing is performed on hardware configured by a control unit for executing processing according to a predetermined program, a CPU as a data processing unit, and a memory as a storage unit for data, parameters, and the like. It is feasible.

  The additional data application processing acquired by the information reproduction processing apparatus will be described with reference to FIGS. 19 and 20. As described above, the additional data includes, for example, encryption such as encryption key information to be applied as a content encryption key, information constituting a part of the data, or data (for example, seed) necessary for generating the encryption key. Key generation information, content reproduction control information, content copy control information, secret information such as a password, and other content attribute information.

  FIG. 19A shows that the additional data is encryption key information to be applied as the content encryption key, information constituting a part of the data, or data (for example, seed) necessary for generating the encryption key. An example of processing in the case of encryption key generation information is shown. The information reproduction processing apparatus applies the acquired encryption key information, executes a main data decryption process, and executes a process of reproducing contents such as music and video. For the decryption process, for example, an encryption algorithm such as DES or AES is applied.

  FIG. 19B shows a processing example when the additional data is content reproduction control information corresponding to the content stored as the main data. In this case, the reproduction control of the main data (content) is executed according to the reproduction control information acquired as the additional data. For example, in content reproduction, output mode control such as 5.1 channel output control, reproduction allowable range control such as an intro part, and the like are executed according to the reproduction control information as additional data.

  FIG. 20 shows processing when the additional data is confidential information such as a password, and content reproduction is permitted by password verification. A password 511 as additional data is input to the confidential information verification unit 512, and a comparison verification process with password information input from an external input device or the like is executed. Only when collation is established, the switch 513 is set to ON, and data reproduction of content as main data, for example, music, video, etc., can be executed.

  Next, a reproduction processing sequence including additional information reading will be described with reference to FIG. The process of FIG. 21 is a process executed in the reproduction processing apparatus shown in FIG.

  In step S301, an RF signal is generated based on a read signal from the information recording medium. In step S302, a demodulation process is executed based on the RF signal, and an additional data setting recording frame, that is, additional data is used as data in the demodulation process. A recording frame in which a DC control bit value corresponding to is set is acquired.

  In the additional data recording area detecting unit 411 shown in FIG. 18, the recording frame storing the user control data is identified as the additional data setting recording frame, and the recording frame in which the DC control bit value corresponding to the additional data is set is acquired. .

  The acquired additional data setting recording frame is input to the additional data decoding unit 408 from the data demodulation processing unit 407 shown in FIG. Further, the additional data decoding unit 408 executes a decoding process for acquiring additional data based on the additional data setting recording frame input from the data demodulation processing unit 407. That is, DC control bit information based on the additional data is extracted from the additional data setting recording frame.

  The additional data decoding unit 408 identifies the user control data storage frame part in the additional data setting recording frame as a frame part in which a DC control bit corresponding to the additional data configuration bit value is stored, for example, frame parts # 7, # 14, The value of the DC control bit at position # 21 is acquired as an additional data configuration bit.

  Next, in step S303, it is determined whether the value of the acquired DC control bit is [0] or [1]. If it is determined that the acquired DC control bit value is [0], it is determined in step S304 that the additional data bit is 0, and if the acquired DC control bit value is [1]. In step S305, it is determined that the additional data bit = 1.

  In step S306, it is determined whether or not it is the final bit of the additional data. If there is an unprocessed bit, the processing in step S302 and subsequent steps is repeatedly executed, and the process ends when the final bit of the additional data is reached.

  The present invention has been described in detail above 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 invention. 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 invention, the claims section described at the beginning should be considered.

  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 hard disk or ROM (Read Only Memory) as a recording medium. Alternatively, the program is temporarily or permanently stored on a removable recording medium such as a flexible disk, a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disk, a DVD (Digital Versatile Disc), a magnetic disk, or a semiconductor memory. It can be stored (recorded). Such a removable recording medium can be provided as so-called package software.

  The program is installed on the computer from the removable recording medium as described above, or is wirelessly transferred from the download site to the computer, or is wired to the computer via a network such as a LAN (Local Area Network) or the Internet. The computer can receive the program transferred in this manner and install it on a recording medium such as a built-in hard disk.

  Note that 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 the present invention, the user control data (UCD) included in the recording data for the information recording medium is adjusted, and a DC control bit set corresponding to the adjusted data is added. The additional data is stored by making it correspond to the data. The DC control bit included in the recording data has a DC control bit value that is correctly set based on the DSV measurement result. Therefore, it is difficult to distinguish the DC control bit corresponding to the additional data from the other DC control bits, and it becomes possible to store the additional data with high analysis difficulty. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content reproduction control information, copy control information, and a password applied to content decryption processing in a manner that is difficult to analyze. Therefore, for example, content that requires copyright protection is stored in a recording medium, and additional information such as key information, key generation information, content reproduction control information, copy control information, and a password applied to decryption processing of the content is stored. The present invention can be applied to an information recording processing apparatus, an information reproduction processing apparatus, and an information recording medium in a configuration that needs to be embedded in a form that is difficult to analyze.

It is a figure which shows the structure of the information recording processing apparatus of this invention. It is FIG. (1) explaining the detail of the process of the modulation data generation part in the information recording processing apparatus of this invention. It is FIG. (2) explaining the detail of the process of the modulation data generation part in the information recording processing apparatus of this invention. It is a figure explaining the data structure of the conversion table applied in the modulation process in the information recording processing apparatus of this invention. It is a figure explaining the detail of the process performed in the recording signal processing circuit in the information recording processing apparatus of this invention. It is a figure explaining the detailed structure of a BIS block and a BIS cluster. It is a figure explaining the user control data structure in a BIS block. It is a figure explaining the user control data structure in a BIS cluster. It is a figure explaining the production | generation process structure of the ECC cluster based on a LDC cluster and a BIS cluster. It is a figure explaining the structure of an additional data setting frame. It is a figure explaining an additional data setting frame and a UCD storage frame part. It is a figure explaining the DC control bit corresponding to additional data and UCD adjustment processing in the UCD storage frame part of the additional data setting frame. It is a figure explaining the DC control bit corresponding to additional data and UCD adjustment processing in the UCD storage frame part of the additional data setting frame. It is a figure which shows the flowchart explaining the UCD adjustment process sequence for setting the DC control bit corresponding to additional data. It is a figure explaining the value of a DC control bit corresponding to additional data, and a UCD adjustment process aspect. It is a figure explaining the value of a DC control bit corresponding to additional data, and a UCD adjustment process aspect. It is a figure which shows the flowchart explaining the additional data recording process sequence performed in the information recording processing apparatus of this invention. It is a figure which shows the structure of the information reproduction | regeneration processing apparatus of this invention. It is a figure explaining the example of an additional data application process in an information reproduction processing apparatus. It is a figure explaining the example of an additional data application process in an information reproduction processing apparatus. It is a figure which shows the flowchart explaining the additional data recording process sequence performed in the information reproduction | regeneration processing apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Information recording medium 102 Pickup 103 Spindle motor 104 Servo circuit 105 Additional data error correction encoding part 106 Main data corresponding | compatible error correction encoding & interleaving process part 107 Additional data recording area control part 108 Switch 109 Modulation data generation part 110 User control data Control unit 111 Recording signal processing circuit 112 UCD compatible error correction encoding & interleaving processing unit 113 ECC cluster generation unit 115 DC control bit generation unit 116 Main data encryption circuit 121 NRZ conversion means 122 XOR
123 Delay means 201 User data 202 Data block 203 LDC block 204 LDC cluster 211 User control data (UCD)
212 Access block 213 BIS block 214 BIS cluster 221 Physical address 231 ECC cluster 232 Cluster 233 Physical cluster 234 Recording frame 235 Modulation recording frame 301 Data frame 302 Additional data setting recording frame 351, 352, 353 User control data (UCD)
361, 371, 381, 391 Original recording frame 362, 372, 382, 392 Additional data setting recording frame 401 Information recording medium 402 Pickup 403 Spindle motor 404 Servo circuit 405 RF circuit unit 406 Synchronization detection unit 407 Data demodulation processing unit 408 Additional data Decoding unit 409 Additional data error correction unit 410 Switch 411 Additional data recording area control unit 412 Data division unit 413 Main data compatible error correction & deinterleave processing unit 414 UCD compatible error correction & deinterleave processing unit 511 Confidential information (password)
512 Secret Information Matching Unit 513 Switch

Claims (27)

In the information recording processing apparatus,
A modulation data generation unit that performs data modulation processing on recording target data and DC control bit setting processing based on DSV measurement, and generates a modulation recording frame as recording unit data;
Stored in the additional data setting recording frame so that at least one or more DC control bits set in the additional data setting recording frame have a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on the DSV measurement. A user control data control unit that executes data adjustment processing of user control data to be performed;
An information recording processing apparatus comprising: The user control data control unit
Additional data setting The configuration is such that the user control data adjustment processing is executed so that the DC control bit value of the frame part for storing the user control data included in the recording frame becomes the corresponding bit value of the additional data configuration bit. The information recording processing apparatus according to claim 1. The user control data control unit
Additional data setting It is determined whether or not the DC control bit value set by the DSV measurement based on the original data of the recording frame corresponds to the additional data configuration bit. 2. The configuration bit change processing for user control data stored in the additional data setting recording frame is executed so that the bit value becomes a bit value corresponding to the additional data configuration bit. Information recording processing device. The user control data control unit
Determines the mode of adjustment of the configuration bits of the user control data based on the DSV measurement values of the divided data area units obtained by dividing the modulation recording frame of the frame part in which the DC control bits corresponding to the additional data configuration bits are set into a plurality of data areas The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute the processing. The information recording processing apparatus includes:
The additional data is
The content is set as configuration information of at least one of encryption key information, encryption key generation information, content reproduction control information, content copy control information, and a password stored in the information recording medium. Item 4. The information recording processing apparatus according to Item 1. The modulation data generation unit
2. The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to generate a modulation recording frame by executing data conversion processing satisfying RLL (1, 7) as a run length rule. The modulation data generation unit
The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute a modulation recording frame generation process including a conversion process of 2-bit information to 3-bit information. An information reproduction processing device that executes reproduction processing of information stored in an information recording medium,
A data demodulator that performs demodulation processing of data read from the information recording medium;
An additional data recording area detecting unit for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding unit that acquires a DC control bit corresponding to an additional data configuration bit value included in the additional data setting recording frame, and executes processing for acquiring additional data information based on the acquired DC control bit;
An information reproduction processing apparatus comprising: The additional data decoding unit
9. The configuration according to claim 8, wherein a process for identifying a user control data storage frame part in an additional data setting recording frame as a frame part storing a DC control bit corresponding to an additional data configuration bit value is executed. Information reproduction processing device. The information reproduction processing device includes:
Based on the acquired additional data component bit information, information on at least one of content encryption key information, encryption key generation information, content reproduction control information, content copy control information, and password stored in the information recording medium is generated. 9. The information reproduction processing apparatus according to claim 8, wherein the information reproduction processing apparatus is configured to execute processing. An information recording medium,
Recording data based on a recording frame in which a DC control bit based on DSV measurement is set;
Recording data based on an additional data setting recording frame storing user control data in which the bit value is adjusted so that the DC control bit based on the DSV measurement has a bit value corresponding to the additional data configuration bit;
An information recording medium characterized by having a configuration in which is stored.   A frame part storing user control data whose bit value is adjusted in the additional data setting recording frame and a DC control bit having a bit value corresponding to the additional data configuration bit belong to the same frame part. The information recording medium according to claim 11. The information recording medium is
The additional data is stored as configuration information of at least one of encryption key information, encryption key generation information, content reproduction control information, content copy control information, and password information stored in the information recording medium. The information recording medium according to claim 11, wherein the information recording medium is a recording medium. The information recording medium is
12. The information recording medium according to claim 11, wherein data is recorded based on a modulated recording frame generated by executing data conversion processing satisfying RLL (1, 7) as a run length rule. . The information recording medium is
The information recording medium according to claim 11, wherein data based on a modulated recording frame generated by executing a process of converting 2-bit information into 3-bit information is recorded. Information recording processing method,
In the additional data setting recording frame, at least one or more DC control bits set in the additional data setting recording frame are set to a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on DSV measurement. A user control data control step for executing adjustment processing of user control data to be stored;
A modulation data generation step of performing modulation processing of the additional data setting recording frame including the user control data adjusted in the user control data control step, and generating a modulation recording frame as a recording unit;
An information recording processing method characterized by comprising: The user control data control step includes
The user control data adjustment processing is performed so that the DC control bit value of the frame part storing the user control data included in the additional data setting recording frame becomes a corresponding bit value of the additional data constituent bits. The information recording processing method described. The user control data control step includes
Determining whether the DC control bit value set by the DSV measurement based on the original data of the additional data setting recording frame corresponds to the additional data configuration bit;
The additional data setting recording frame so that the DC control bit value is a bit value corresponding to the additional data configuration bit when it is determined that the data is not compatible;
The information recording processing method according to claim 16, further comprising: The user control data control step includes
Determines the mode of adjustment of the configuration bits of the user control data based on the DSV measurement values of the divided data area units obtained by dividing the modulation recording frame of the frame part in which the DC control bits corresponding to the additional data configuration bits are set into a plurality of data areas The information recording processing method according to claim 16, wherein the information recording processing method is a step of executing the processing. In the information recording processing method,
The additional data is configuration information of at least one of information of encryption key information, encryption key generation information, content reproduction control information, content copy control information, and a password stored in the information recording medium. The information recording processing method according to claim 16. The modulation data generation step includes
17. The information recording processing method according to claim 16, wherein a modulation recording frame is generated by executing data conversion processing satisfying RLL (1, 7) as a run length rule. The modulation data generation step includes
The information recording processing method according to claim 16, wherein modulation recording frame generation processing including conversion processing of 2-bit information into 3-bit information is executed. An information reproduction processing method for executing reproduction processing of information stored in an information recording medium,
A data demodulation step for performing demodulation processing of data read from the information recording medium;
An additional data recording area detecting step for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding step of acquiring a DC control bit corresponding to the additional data configuration bit value included in the additional data setting recording frame, and performing an acquisition process of the additional data information based on the acquired DC control bit;
An information reproduction processing method characterized by comprising: The additional data decoding step includes:
The step of identifying the user control data storage frame part in the additional data setting recording frame as a frame part storing a DC control bit corresponding to the additional data configuration bit value is included. Information reproduction processing method. The information reproduction processing method further includes:
Based on the acquired additional data component bit information, information on at least one of content encryption key information, encryption key generation information, content reproduction control information, content copy control information, and password stored in the information recording medium is generated. The information reproduction processing method according to claim 23, further comprising a step of executing a process. A computer program for executing information recording processing;
Additional data setting The additional data setting so that at least one DC control bit corresponding to additional data set in the recording frame is set to a bit value corresponding to the additional data configuration bit in the DC control bit setting process based on DSV measurement. A user control data control step for executing adjustment processing of user control data stored in the recording frame;
A modulation data generation step of performing modulation processing of the additional data setting recording frame including the user control data adjusted in the user control data control step, and generating a modulation recording frame as a recording unit;
A computer program characterized by comprising: A computer program for executing reproduction processing of information stored in an information recording medium;
A data demodulation step for performing demodulation processing of data read from the information recording medium;
An additional data recording area detecting step for identifying a recording frame storing user control data as an additional data setting recording frame;
An additional data decoding step of acquiring a DC control bit corresponding to an additional data configuration bit value included in the additional data setting recording frame, and performing an acquisition process of the additional data information based on the acquired DC control bit;
A computer program characterized by comprising:

Images