JP2005166199A - Information recording processor, information reproducing processor, information recording medium, its method, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which is used to record additional data that are difficult to be analyzed onto an information recording medium and to reproduce the data, and provide its medium, its method, and a computer program. <P>SOLUTION: Setting of the additional data is conducted on the basis of the corresponding relationship of the bit value of specific user control data (UCD) included in recorded data with respect to an information recording medium and DC control bits to be set in the recording data. In accordance with the constituting bit value "1" or "0" of the additional data, a selection process is executed to set the DC control bits, which are to be set in the additional data corresponding determination DC control bit storage frame being selected from recording object data, to a value that is matched with the bit information of the additional data corresponding determination user control data (UCD) being selected from the recording object data or a value that does not match with the bit information and a DC control bit setting process is conducted in accordance with the constituting bit value of the additional data. <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 data, for example, key information, content reproduction control information, copy control information, etc., applied to the content decryption process is recorded on an information recording medium for recording content such as image data and music data. In the configuration that enables reading, by setting additional data based on the correspondence between the bit value of specific user control data (UCD) included in the recording data and the DC control bits set in the recording data, The present invention relates to an information recording processing apparatus, an information reproduction processing apparatus, an information recording medium and method, and a computer program that realize an additional data embedding configuration with high analysis difficulty.

  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 the encryption key or control information is stored in the information recording medium is acquired by the user or an unauthorized content user, additional data 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 reproduction control information, copy control information, a password, and the like can be recorded and read, a bit value of specific user control data (UCD) included in the recording data and a DC control bit set in the recording data Provides an information recording processing device, an information reproduction processing device, an information recording medium, a method, and a computer program that realize an additional data embedding configuration with high analysis difficulty by setting additional data based on the correspondence relationship For the purpose.

The first aspect of the present invention is:
In the information recording processing apparatus,
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium A DC control bit selection unit that performs bit selection processing;
A modulation data generating unit that performs data modulation processing on recording target data and DC control bit setting processing to generate a modulated recording frame as recording unit data, and performs DC control bit setting processing based on DSV control, or the DC A modulation data generation unit that selectively executes DC control bit setting processing based on input information from the control bit selection unit;
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 DC control bit selection unit determines whether the additional data is selected from the data to be recorded according to the constituent bit value of the additional data to be recorded on the information recording medium. Whether the DC control bit set in the DC control bit storage frame is a value that matches or does not match the bit information of the additional data correspondence determination user control data (UCD) selected from the recording target data The configuration is such that a selection process is executed.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the DC control bit selection unit sets a value that matches the 8-bit information of the additional data correspondence determination user control data (UCD) selected from the recording target data. The additional data correspondence determination DC control bit storage frame selected from the data to be recorded is configured to execute selection processing for determining whether or not to set eight DC control bits.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the DC control bit selection unit uses one unit of 8-bit user control data (UCD) selected from the data to be recorded as a user control for additional data correspondence determination. It is configured to execute a process of setting eight DC control bit values to be set in the additional data correspondence determination DC control bit storage frame according to the value of the additional data configuration bit to be recorded and input as data (UCD). It is characterized by being.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the DC control bit selection unit further selects a value corresponding to a constituent bit value of additional data to be recorded on the information recording medium from the data to be recorded. The present invention is characterized in that a process of setting as one unit of 8-bit user control data (UCD) is executed.

  Furthermore, in an embodiment of the information recording processing apparatus of the present invention, the modulation data generation unit may store at least a part of the DC control bits set in the additional data correspondence determination DC control bit storage frame selected from the recording target data. The setting is based on DC control bit information input from the DC control bit selection unit, and the other DC control bits are configured to execute processing for setting based on DSV measurement.

  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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding unit that executes processing for acquiring additional data configuration bit information;
The information reproduction processing apparatus is characterized by comprising:

  Furthermore, in one embodiment of the information reproduction processing apparatus of the present invention, the additional data decoding unit determines whether or not there is a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). Accordingly, it is characterized in that a determination process of whether the additional data configuration bit is 1 or 0 is performed.

  Furthermore, in an embodiment of the information reproduction processing apparatus of the present invention, the additional data decoding unit determines whether or not there is a correspondence relationship between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). It is configured to perform a process of determining and determining the configuration bits of the additional data correspondence determination user control data (UCD) as the additional data configuration bits based on the determination of the presence of correspondence.

Furthermore, the third aspect of the present invention provides
An information recording medium,
Information having a configuration in which additional data that can be analyzed based on a correspondence relationship between a bit value of specific user control data (UCD) included in the recording data and a DC control bit set in the recording data is recorded It is on a recording medium.

  Furthermore, in one embodiment of the information recording medium of the present invention, the information recording medium corresponds to user control data (UCD) and a DC control bit set in a recording frame according to a configuration bit value of recording additional data. The present invention is characterized in that recording data based on a recording frame generated by controlling the presence or absence of a relationship is stored.

  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,
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium DC control bit selection step for performing bit selection processing;
This is a modulation data generation step for executing a data modulation process for recording target data and a DC control bit setting process to generate a modulated recording frame as recording unit data, a DC control bit setting process based on DSV control, or the DC A modulation data generation step for selectively executing a DC control bit setting process based on the selection information in the control bit selection step;
An information recording processing method characterized by comprising:

  Furthermore, in one embodiment of the information recording processing method of the present invention, the DC control bit selection step comprises the additional data correspondence determination selected from the recording target data in accordance with the constituent bit value of the additional data recorded on the information recording medium. Whether the DC control bit set in the DC control bit storage frame is a value that matches or does not match the bit information of the additional data correspondence determination user control data (UCD) selected from the recording target data A selection process is executed.

  Furthermore, in one embodiment of the information recording processing method of the present invention, the DC control bit selecting step sets a value that matches the 8-bit information of the additional data correspondence determination user control data (UCD) selected from the data to be recorded. In addition, a selection process of whether or not to set as eight DC control bits to be set in a DC control bit storage frame for determining additional data correspondence selected from data to be recorded is executed.

  Furthermore, in one embodiment of the information recording processing method of the present invention, the DC control bit selecting step uses one unit of 8-bit user control data (UCD) selected from the data to be recorded as additional data correspondence determination user control. Inputting as data (UCD) and executing the process of setting the values of the eight DC control bits to be set in the additional data correspondence determination DC control bit storage frame according to the value of the additional data constituting bits to be recorded Features.

  Furthermore, in an embodiment of the information recording processing method of the present invention, the information recording processing method further includes: 1 selected from the data to be recorded, a value corresponding to a constituent bit value of additional data to be recorded on the information recording medium. It has a step of executing a process of setting as unit 8-bit user control data (UCD).

  Furthermore, in one embodiment of the information recording processing method of the present invention, the modulation processing step includes at least part of the DC control bits set in the additional data correspondence determination DC control bit storage frame selected from the recording target data. It is set based on DC control bit information input from the DC control bit selection unit, and the other DC control bits have a step of executing a process of setting based on DSV measurement.

  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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding step for executing processing for acquiring additional data configuration bit information;
An information reproduction processing method characterized by comprising:

  Furthermore, in an embodiment of the information reproduction processing method of the present invention, the additional data decoding step is performed based on whether or not there is a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). Accordingly, the process of determining whether the additional data component bit is 1 or 0 is performed.

  Furthermore, in an embodiment of the information reproduction processing method of the present invention, the additional data decoding step determines whether or not there is a correspondence relationship between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). Based on the determination that there is a correspondence relationship, a process of obtaining the constituent bits of the additional data correspondence determination user control data (UCD) as the additional data constituent bits is performed.

Furthermore, the sixth aspect of the present invention provides
A computer program for executing information recording processing;
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium DC control bit selection step for performing bit selection processing;
This is a modulation data generation step for executing a data modulation process for recording target data and a DC control bit setting process to generate a modulated recording frame as recording unit data, a DC control bit setting process based on DSV control, or the DC A modulation data generation step for selectively executing a DC control bit setting process based on input information from the control bit selection 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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding step for executing processing for acquiring additional data configuration bit information;
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 configuration of the present invention, the additional data is set based on the correspondence between the bit value of the specific user control data (UCD) included in the recording data for the information recording medium and the DC control bit set in the recording data. Since the configuration is adopted, an additional data embedding configuration with high analysis difficulty is realized.

  According to the configuration of the present invention, the additional data correspondence determination DC selected from the recording target data depending on whether the configuration bit value of the additional data to be recorded on the information recording medium is [1] or [0]. Selection processing for selecting whether the DC control bit set in the control bit storage frame is a value that matches or does not match the bit information of the user control data (UCD) for additional data correspondence determination selected from the recording target data And the DC control bit setting process corresponding to the configuration bit value of the additional data is performed. In the reproduction processing apparatus, the DC control bit information set in the DC control bit storage frame for determining the additional data correspondence and the additional data correspondence It is possible to read the additional data by performing a correspondence determination process with the bit information of the determination user control data (UCD).

  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).

  As shown in FIG. 1, the information recording processing apparatus includes an information recording medium 101 capable of recording 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, and a pickup 102. And a servo circuit 104 for controlling the spindle motor 103, an additional data error correction encoding unit 105, an error correction encoding & interleaving processing unit 106 for main data, an additional data recording area control unit 107, a switch 108, and a modulation data generation unit 109. , DC control bit setting 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, DC control bit selection unit 11 Has a main data encryption circuit 116.

  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 Additional data such as key information, content reproduction control information, and copy control information applied to the content decryption process. The additional data is set as data that can be acquired based on the correspondence between the bit value of specific user control data (UCD) and the DC control bits set in the recording data.

  The DC control bit selection unit 114 performs a process of selecting a bit value of the DC control bits set in the recording frame for storing additional data correspondence determination DC control bits. Specifically, according to the additional data configuration bit [0] or [1], the DC control bit set in the recording frame storing the additional data correspondence determination DC control bit is set to the bit value of the specific user control data (UCD). DC bit selection processing is performed to determine whether to set as a bit value that matches (8 bits) or as a DC control bit that does not match. Details of these processes will be described later.

  The content data to be recorded on the information recording medium 101 is, for example, encrypted content data, and the main data is encrypted by the main data encryption circuit 116 with an encryption key. 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.

  The ECC cluster generation unit 113 generates an ECC cluster based on the interleaved main data and user control data, and the modulation data generation unit 109 inputs the ECC cluster and executes the modulation process. The modulation data generation unit 109 performs modulation based on an RLL (1, 7) modulation scheme 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, the DC control bit setting unit 110 sets the DC control bit (Digital Sum Variation) so that the absolute value of DSV (Digital Sum Variation) at the time of modulation is reduced at certain intervals of the input main data. After selecting and inserting “0” or “1” of DC-Control bit), 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.

  However, in the present invention, in the setting of the DC control bit, the DC control bit setting according to the above rule is not set for a specific selected recording frame, that is, a DC control bit storage frame for determining additional data correspondence. The bit value selected by the DC control bit selection unit 114 is set as the DC control bit. That is, according to the additional data configuration bit [0] or [1], a DC control bit having a bit string that matches the bit value (8 bits) of specific user control data (UCD) is set or a bit string that does not match The DC bit is set to determine whether to set a DC control bit having. The DC control bit information is output from the DC control bit selection unit 114 to the modulation data generation unit 109 via the switch 108 controlled by the additional data recording area control unit 107. Details of the DC control bit setting process based on the additional data 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.

  However, as described above, in the present invention, in the setting of the DC control bit, the DC data in accordance with the above rule is applied to a specific selected recording frame, that is, a DC control bit storage frame for determining additional data correspondence. Instead of setting the control bit, the bit value selected by the DC control bit selection unit 114 is set as the DC control bit. That is, according to the additional data configuration bit [0] or [1], a DC control bit having a bit string that matches the bit value (8 bits) of specific user control data (UCD) is set or a bit string that does not match The DC bit is set to determine whether to set a DC control bit having. Details of this processing will be described later.

  A modulation process for converting 2-bit data into 3-bit data is performed on the frame in which the DC control bit is set, that is, the recording frame 234 including 1288-bit data shown in FIG. 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 reproduction control information, copy control information, and the like are stored in specific user control data (UCD), that is, additional data correspondence determination UCD. It is set as data that can be acquired based on the correspondence between the bit value (8 bits) and the eight DC control bits contained in the recording frame storing the additional data correspondence determination DC control bits.

  For example, when the 8-bit bit value of specific user control data (UCD) and the eight DC control bit values included in the DC control bit storage recording frame for determination of additional data correspondence match, the constituent bits of the additional data are [0] means that the 8-bit bit value of the specific user control data (UCD) does not match the eight DC control bit values included in the additional data correspondence determination DC control bit storage recording frame Is a setting that means that the configuration bit of the additional data is [1].

  The additional data recording area control unit 107 shown in FIG. 1 performs switch control to turn on the switch 108 when the modulation data generation unit 109 performs modulation of the additional data correspondence determination DC control bit storage recording frame. The DC control bit value selected by the control bit selection unit 114 is output to the modulation data generation unit 109.

  The modulation data generation unit 109 does not use the DC control bit having the bit value determined based on the above-described DSV measurement at the DC control bit setting position corresponding to the additional data in the recording frame storing the additional data correspondence determination DC control bit. The value of the DC control bit selected by the control bit selection unit 114 is set.

  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, control processing for setting DC control bits to bit settings corresponding to additional data. 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 includes encryption key generation information such as encryption key information to be applied as an encryption key of encrypted content, information constituting a part of the data, or data (for example, seed) necessary for generating the encryption key, And other content attribute information such as secret information such as passwords or various control information such as content reproduction control and copy control [0, 0, 0, 1, 0, 0, 0... ] Or the like. 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 set by the above-described configuration.

  That is, by setting a DC control bit string that coincides with 8 bits of specific user control data (UCD) in a DC control bit storage recording frame for determination of correspondence to additional data, it indicates that the additional data configuration bit is [0], By setting a DC control bit string that does not match the 8 bits of the specific user control data (UCD) in the recording frame storing the DC control bit for determining additional data correspondence, it is indicated that the additional data configuration bit is [1].

In addition,
When UCD = DC control bit, additional data bit = [0]
When UCD ≠ DC control bit, additional data bit = [1]
Or set to
When UCD = DC control bit, additional data bit = [1]
When UCD ≠ DC control bit, additional data bit = [0]
An arbitrary setting is possible as to which aspect of the setting to be used.

  The additional data setting configuration in the present invention 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. The user control data of unit 0 stores 36 (3 × 12) pieces of UCD configuration data [UC0, 0] to [UC4, 25] each consisting of 1 byte (8 bits) data. 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.

In the present invention, as shown in FIG. 10, a specific row selected from 496 rows constituting the ECC cluster 231 is
(A) Additional data correspondence determination DC control bit storage frame 311
(B) Additional data correspondence determination UCD storage frame 321
Set as.

  (A) The additional data correspondence determination DC control bit storage frame 311 is an adjusted DC control bit having a bit value determined based on a constituent bit value of additional data such as an encryption key and an additional data correspondence determination UCD. Is a frame in which is stored. For some DC control bits set in the additional data correspondence determination DC control bit storage frame 311, the DC control bit selection unit 114 shown in FIG. 1 determines the configuration bit value of additional data such as an encryption key and the additional data correspondence determination. It is determined based on the UCD for use.

  (B) The additional data correspondence determination UCD storage frame 321 is a frame in which the additional data correspondence determination UCD is stored.

  The (A) additional data correspondence determination DC control bit storage frame 311 and the (B) additional data correspondence determination UCD storage frame 321 may be set as separate frames, but one frame is set as additional data. The correspondence determination DC control bit storage frame and the additional data correspondence determination UCD storage frame may be set.

  As shown in FIG. 10, in the additional data correspondence determination UCD storage frame 321, a UCD to be applied to the additional data correspondence determination process, for example, UCD (UC0, 0) consisting of 8-bit data shown in FIG. It is stored in the user control data area (i) 322 which is the cluster setting position.

  It is assumed that the UCD (UC0, 0) composed of the 8-bit data is set as the additional data correspondence determination UCD. The additional data correspondence determination UCD: (UC0, 0) stores, for example, (00111101) as 8-bit data.

  In this case, (A) the DC control bits of the DC control bits stored in the additional data correspondence determination DC control bit storage frame 311 are adjusted, and when the additional data configuration bit = [0], (UC0, 0) DC control bits that match the 8-bit data (00111101) are set, and when the additional data configuration bit = [1], the DC control that does not match the 8-bit data (00111101) of (UC0, 0) Set bit 8 bit.

  In the configuration of FIG. 1, the additional data is input to the additional data error correction encoding unit 105, and an encoding process for adding the error correction code is performed. The additional data refers to encryption key information applied as an encryption key for encrypted content, information constituting a part of the data, or data required for generating an encryption key (for example, a seed). This is data composed of various information such as generation information, secret information such as a password, various control information such as content reproduction control and copy control, and other content attribute information.

  The DC control bit selection unit 114 receives a bit string of additional data to which an error correction code is added. For example, a data string such as [0, 0, 0, 1, 0, 0, 0. This bit string includes, for example, encryption key information, encryption key generation information, content reproduction control information, content copy control information, a password, and other content attribute information, and additional data error correction for the additional data. It is a bit string including an error correction code set in the encoding unit 105.

  Further, the constituent bit information of the additional data correspondence determination UCD is input to the DC control bit selection unit 114. For example, in the above-described example, it is 8-bit data (00111101) of (UC0, 0).

  The DC control bit selection unit 114 sequentially acquires the bit string of the additional data to which the error correction code is added, one bit at a time. When the additional data configuration bit = [0], the 8-bit data (UC0, 0) ( The DC control bit value is selected so as to set the DC control bit matched with 00111101), and the selected DC control bit value information is output to the modulation data generation unit 109 via the switch 108.

  The modulation data generation unit 109 executes generation and modulation processing of the additional data correspondence determination DC control bit storage frame having the DC control bit value input from the DC control bit selection unit 114.

  The additional data recording area control unit 107 turns on the switch 108 at the timing of executing the modulation process corresponding to the DC control bit storage frame for determining additional data correspondence, and generates the selected bit information from the DC control bit selection unit 114 as modulated data. Control is performed to output to the unit 109.

  When a frame other than the DC control bit storage frame for determination of correspondence to additional data is generated and the modulation process is executed, the switch 108 is turned OFF, and the normal DC control bit setting process, that is, the DC control bit setting process based on the DSV measurement is performed by the DC control bit It is executed in the setting unit 110.

  As shown in FIG. 10, in the additional data correspondence determination DC control bit storage frame 331, 20 synchronization (Sync) bits are set, and each of the frame parts # 0 to # 27 each having a 45-bit configuration. One DC control bit (DC-control bit) is set in the frame part.

  As described above, the DC control bit storage frame 331 for determining correspondence with additional data stores a total of 28 DC control bits # 0 to # 27. Of these, 8 DC control bits are specified. Is set as a DC control bit for correspondence determination for determining a match or a mismatch with the UCD for additional data correspondence determination.

  Other DC control bits are set as DC control bits having a bit value determined based on normal bit value setting processing, that is, DSV measurement.

  A detailed configuration of the additional data correspondence determination DC control bit storage frame will be described with reference to FIG.

  FIG. 11A shows a detailed configuration of the DC control bit storage frame for determining additional data correspondence when the additional data configuration bit is [0], and FIG. 11B shows the additional data configuration bit of [1]. The detailed structure of the DC control bit storage frame for additional data correspondence determination in the case of FIG.

  In this processing example, when the additional data configuration bit is [0], the DC control bit that matches the bit value of the correspondence determination UCD is set in the additional data correspondence determination DC control bit storage frame, and the additional data configuration bit is set. In the case of [1], a DC control bit that does not match the bit value of the correspondence determination UCD is set in the additional data correspondence determination DC control bit storage frame.

  In (A), the additional data configuration bit is [0], and the correspondence determination UCD is 8 bits (00111101) of UC (0, 0). In this case, 8 bits (00111101) are stored in the corresponding determination DC control bit storage position of the additional data correspondence determination DC control bit storage frame.

  Here, the correspondence control DC control bit storage position of the additional data correspondence determination DC control bit storage frame is the frame part # 3, # 6, # 9, # 12, # 15, # 18, # 21, # 24. There are 8 frame parts. These correspondence determination DC control bit storage positions are examples, and can be set to arbitrary positions as long as they are preset positions. When a legitimate reproduction processing program is executed, a DC control bit is read from each of these bit positions to determine correspondence with the correspondence determination UCD, that is, whether or not they match, and the bit value of the additional data is To be acquired. Details of the reproduction process will be described later.

  In the example shown in FIG. 11B, the additional data configuration bit is [1], and the correspondence determination UCD is 8 bits (00111101) of UC (0, 0). In this case, the DC control bit storage position for correspondence determination of the DC control bit storage frame 352 for additional data correspondence determination is stored in the frame parts # 3, # 6, # 9, # 12, # 15, # 18, # 21, and # 24. Stores a bit string different from 8 bits (00111101). The DC control bits 8 bits may be any bit string as long as it is a bit string different from (00111101). In the example of the figure, (10010100) is the DC judgment bit storage position for correspondence judgment of the DC control bit storage frame 352 for additional data correspondence judgment, frame parts # 3, # 6, # 9, # 12, # 15, # 18, Examples stored in # 21 and # 24 are shown.

  As described above, in the configuration of the present invention, a part of the user control data (UCD) included in the data stored in the recording medium (disc) is set as the additional data correspondence determination UCD, and the additional data configuration bit is set. Depending on whether it is [0] or [1], the DC control bits set in the additional data correspondence determination DC control bit storage frame are set to match the correspondence determination UCD, or they do not match. The additional data information such as encryption key information is embedded by applying a plurality of additional data correspondence determination DC control bit storage frames.

  As shown in FIG. 12, when the correspondence determination DC control bit information (8 bits) of the additional data correspondence determination DC control bit storage frame is [A] and the bit information of the correspondence determination UCD is [B], If A = B, additional data configuration bit = [0], and if A ≠ B, additional data recording / reproduction processing is executed under the setting that additional data configuration bit = [1]. Is done.

  With reference to FIG. 13, the additional data recording / storage processing configuration based on the correspondence determination between the additional data correspondence determination DC control bit and the additional data correspondence determination UCD in the recording medium (disc) will be described.

  As described above, a plurality of ECC clusters (see FIG. 3) generated by main data such as contents and user control data (UCD) such as control information are set in the recording medium (disc) 361, and each ECC cluster unit. The recording data generation process is executed, a recording frame in which the DC control bit is set is set, and a recording signal based on the recording frame is generated and recorded.

When the additional data recording process according to the configuration of the present invention is performed, for example, one additional data correspondence determination UCD is set in the ECC cluster-A371. For example, as the UCD included in the ECC cluster-A 371, 8 bits [UC0, 0] are used as the additional data correspondence determination UCD381. On the other hand, a plurality of frames included in the ECC cluster-A 371 are set as additional data correspondence determination DC control bit storage frames 382-1 to 38p, and the DC control bits of the p additional data correspondence determination DC control bit storage frames are set. Are sequentially compared with the UCD bit of the additional data correspondence determination UCD381;
In the case of correspondence (match), additional data configuration bit = 0,
When there is no correspondence (mismatch), additional data configuration bit = 1,
In the case of a disk storing N ECC clusters, p × N bits of additional data can be stored in one ECC cluster.

  In the example shown in FIG. 13, a setting example is shown in which only one additional data correspondence determination UCD is set for one ECC cluster. However, a plurality of additional data correspondence determination UCDs are set to determine correspondence. The UCD that executes the process may be changed for each additional data correspondence determination DC control bit storage frame.

  The additional data recording area control unit 107 shown in FIG. 1 identifies the additional data correspondence determination DC control bit storage frame based on preset information, and the modulation data generation unit 109 determines the additional data correspondence determination DC control bit. When the storage frame is modulated, the switch 108 is switched so that the set bit value of the additional data correspondence determination DC control bit included in the additional data correspondence determination DC control bit storage frame is supplied from the DC control bit selection unit 114. The modulation data generation unit 109 outputs the data.

  The DC control bit selection unit 114 inputs the bit information of the additional data correspondence determination UCD and the additional data bit. When the additional data bit = [0], the bit coincides with the bit information of the additional data correspondence determination UCD. The value is selected as a DC control bit and output to the modulation data generation unit 109. When the additional data bit = [1], the bit value that does not match the bit information of the additional data correspondence determination UCD is selected as the DC control bit. Then, the data is output to the modulation data generation unit 109.

  Based on the bit value input from the DC control bit selection unit 114, the modulation data generation unit 109 receives the input bit value at the specific additional data correspondence determination DC control bit setting position in the additional data correspondence determination DC control bit storage frame. To generate a recording frame and perform modulation processing.

  With reference to FIG. 14, the additional data recording processing sequence executed in the information recording processing apparatus of the present invention will be described.

  In step S101, 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. The additional data is encryption key information such as encryption key information to be applied as an encryption key of the encrypted content, information constituting a part of the data, or data (for example, seed) necessary for generating the encryption key. This is data composed of various information such as information, secret information such as passwords, and various control information such as content playback control and copy control. An error correction code is added to these additional data. A bit string of data, for example, a data string such as [0, 0, 0, 1, 0, 0, 0.

  In step S102, one bit is taken out as a recording bit in order from a constituent bit string of the additional data, for example, [0, 0, 0, 1, 0, 0, 0.

  In step S103, bit information acquisition processing of user control data (UCD) for additional data correspondence determination is performed. For example, 8-bit information of [UC0, 0].

  In step S104, it is determined whether the configuration bit of the additional data acquired in step S102 is [0] or [1].

  If the configuration bit of the additional data is [0], the process proceeds to step S105, and DC control bits to be set in the additional data correspondence determination DC control bit storage frame, for example, frame parts # 3, # 6, # 9, # 12 , # 15, # 18, # 21, and # 24, the 8 bits set in the frame parts are set to the same values as the bit values of the additional data correspondence determination user control data (UCD) acquired in step S103. To do.

  If it is determined in step S104 that the configuration bit of the additional data is [1], the process proceeds to step S106, and the DC control bit to be set in the additional data correspondence determination DC control bit storage frame, for example, frame part # 3, # 6 bits # 9, # 12, # 15, # 18, # 21, and # 24, the bit value of the user control data (UCD) for determining additional data correspondence acquired in step S103. Set to a value that does not match.

  Next, proceeding to step S107, modulation processing of the additional data correspondence determination DC control bit storage frame is executed.

  In step S108, it is determined whether or not the processing of the last bit of the additional data has been completed.

  In step S108, the determination is made that there is no unprocessed data, and the processing ends, that is, recording data into which additional data bits are inserted is generated according to the above-described processing.

  In the flow, only the processing for the additional data correspondence determination DC control bit storage frame is shown, but the DC control bit based on the DSV measurement is set in a frame other than the additional data correspondence determination DC control bit storage frame. The generated recording frame is generated and modulated. Also, the additional data correspondence determination DC control bit storage position in the additional data correspondence determination DC control bit storage frame, that is, frame parts # 3, # 6, # 9, # 12, # 15, # 18, # 21, # The 8 bits set in the 8 frame parts of 24 are set as DC control bits with values selected according to the above-described processing, but the DC control bits based on DSV measurement are used for the DC control bits of other frame parts. Is set.

  Further, the DC control bit storage position for determining additional data correspondence in the DC control bit storage frame for determining additional data correspondence is stored in frame parts # 3, # 6, # 9, # 12, # 15, # 18, # 21, # 24. An arbitrary position can be set as well as the position.

  In the embodiment, an example has been described in which all 8 bits of the user control data (UCD) for determining correspondence with additional data are set as correspondence determination bits. It is good also as a structure used as bit data for a process. In this case, the additional data correspondence determination DC control bit storage position in the additional data correspondence determination DC control bit storage frame is also set to only four bit positions.

  Furthermore, in the above-described embodiment, depending on whether or not the bit value of the additional data correspondence determination user control data (UCD) matches the additional data correspondence determination DC control bit in the additional data correspondence determination DC control bit storage frame. The processing example for determining whether the additional data configuration bit is [0] or [1] has been described, but the bit value of the additional data correspondence determination user control data (UCD) and the additional data correspondence determination DC When the additional data correspondence determination DC control bits in the control bit storage frame match, the bit value of the additional data correspondence determination user control data (UCD) itself may be set as the additional data configuration bit value.

  In the case of this setting, the DC control bit selection unit 114 performs processing for changing the additional data correspondence determination user control data (UCD) according to the additional data. According to this configuration, 8 configuration bits of one UCD can be associated with additional data.

  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. 15, 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 encryption key information applied as an encryption key of the encrypted content, or a part thereof Information that makes up data, encryption key generation information such as data required to generate an encryption key (for example, seed), secret information such as passwords, and various controls such as content playback control and copy control It is data composed of various information such as information 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 receives an additional data correspondence determination DC control bit storage frame input from the data demodulation processing unit 407 via the switch 410, and an error correction & deinterleave processing unit 414 corresponding to user control data (UCD). In order to acquire additional data by detecting the correspondence (whether or not they match) the DC control bit information for additional data correspondence determination and the UCD bit information based on the user control data (UCD) for additional data correspondence determination to be performed The decoding process is executed.

  That is, if the additional data correspondence determination DC control bit information and the UCD bit information match, the additional data configuration bit = [0], and if the additional data correspondence determination DC control bit information does not match the UCD bit information, it is added. An additional data configuration bit determination process for determining data configuration bit = [1] is executed.

  As described in the configuration of the information recording processing apparatus, there is a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD), that is, the user control data ( When the recording process is performed in which 8 bits of UCD) are set as the constituent bits of the additional data, the additional data decoding unit 408 includes the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). ) To obtain the constituent bits of the additional data correspondence determination user control data (UCD) as the additional data constituent bits based on the presence / absence of the correspondence relation.

  In the reproducing apparatus, when the data processed in the data demodulation processing unit 407 is a DC control bit storage frame for determination of correspondence to additional data, the frame data is input to the additional data decoding unit 408 via the switch 410 and the additional data In the decoding unit 408, a specific DC control bit of the DC control bit frame for additional data correspondence determination is acquired, and processing for determining the constituent bits of the additional data is executed based on the correspondence determination with the UCD bit. The additional data recording area detection unit 411 performs control to turn on the switch 410 when the data demodulation processing unit 407 executes the processing of the additional data correspondence determination DC control bit storage frame.

  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 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. 15 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 a DC control bit storage frame for determination of additional data correspondence, acquisition of additional data Acquisition and analysis 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 reproduction processing apparatus of the present invention, the hardware shown in FIG. 15 and other hardware corresponding to the individual constituent elements of the constituent 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.

  An example of application processing of additional data acquired by the information reproduction processing device will be described with reference to FIGS. 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. 16 (a) shows that the additional data includes 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. 16B shows an example of processing 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. 17 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 data reading will be described with reference to FIG. The process of FIG. 18 is a process executed in the reproduction processing apparatus shown in FIG.

  In step S201, an RF signal is generated based on a read signal from the information recording medium. In step S202, a demodulation process is executed based on the RF signal, and a DC control bit for additional data correspondence determination is stored as data in the demodulation process. Demodulation data of the recording frame is acquired.

  The additional data recording area detection unit 411 shown in FIG. 15 determines the demodulation timing of the DC control bit storage recording frame for determination of additional data correspondence, and the DC control bit storage recording frame for determination of additional data correspondence is obtained from the data demodulation processing unit 407. Are output to the additional data decoding unit 408.

  Further, in step S203, the additional data decoding unit 408 stores the additional data correspondence determination DC control bit storage position from the additional data correspondence determination DC control bit storage recording frame input from the data demodulation processing unit 407, for example, the frame part. The DC control bit values set in the eight frame parts # 3, # 6, # 9, # 12, # 15, # 18, # 21, and # 24 are acquired. These bit information is assumed to be [A].

  Next, in step S <b> 204, the additional data decoding unit 408 acquires additional data correspondence determination user control data (UCD) from the user control data (UCD) correspondence error correction & deinterleave processing unit 414. The UCD bit information is [B].

In step S205, the additional data decoding unit 408
DC control bit information [A] = UCD bit information [B]
Whether or not is satisfied is determined.

DC control bit information [A] = UCD bit information [B]
Is established, it is determined in step S206 that the additional data bit = 0.
DC control bit information [A] = UCD bit information [B]
If is not established, it is determined in step S207 that the additional data bit = 1.

  In step S208, 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 S202 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 correspondence between the bit value of specific user control data (UCD) included in the recording data for the information recording medium and the DC control bit set in the recording data Since the configuration for setting additional data based on the configuration is made, an additional data embedding configuration with high analysis difficulty is realized. In the configuration of the present invention, for example, content that requires copyright protection is stored in a recording medium, and key information, key generation information, content reproduction control information, copy control information, and the like applied to decryption processing of the content are added. 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 in which data needs to be embedded in a form that is difficult to analyze.

  According to the configuration of the present invention, the additional data correspondence determination DC selected from the recording target data depending on whether the configuration bit value of the additional data to be recorded on the information recording medium is [1] or [0]. Selection processing for selecting whether the DC control bit set in the control bit storage frame is a value that matches or does not match the bit information of the user control data (UCD) for additional data correspondence determination selected from the recording target data And the DC control bit setting process corresponding to the configuration bit value of the additional data is performed. In the reproduction processing apparatus, the DC control bit information set in the DC control bit storage frame for determining the additional data correspondence and the additional data correspondence It is possible to read the additional data by performing a correspondence determination process with the bit information of the determination user control data (UCD). The configuration of the invention is such that, for example, content requiring copyright protection is stored in a recording medium, and additional data such as key information, key generation information, content reproduction control information, copy control information, etc. applied to the decryption processing of the content Can be applied to an information recording processing apparatus, an information reproduction processing apparatus, and an information recording medium in a configuration in which it is necessary to embed the information 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 the DC control bit storage recording frame for additional data correspondence determination, and the UCD storage recording frame for additional data correspondence determination. It is a figure explaining the DC control bit setting of the DC control bit storing recording frame for additional data correspondence determination based on the additional data configuration bit value. It is a figure explaining the correspondence of correspondence control DC control bit, correspondence judgment UCD bit, and additional data bit. It is a figure explaining the structure of the DC control bit storage recording frame for additional data corresponding | compatible determination stored in the information recording medium, and the UCD storage recording frame for additional data corresponding | compatible determination. 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 DC control bit Setting unit 111 Recording signal processing circuit 112 UCD compatible error correction encoding & interleaving processing unit 113 ECC cluster generation unit 114 DC control bit selection 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 311 DC Control Bit Storage Recording Frame 321 for Additional Data Correspondence Determination Recording Frame 322 for Additional Data Correspondence Determination User control data (UCD)
331 Additional data correspondence determination DC control bit storage recording frame 351 Additional data correspondence determination DC control bit storage recording frame 352 Additional data correspondence determination DC control bit storage recording frame 371 ECC cluster 381 Additional data correspondence determination UCD
382 Additional data correspondence determination DC control bit storage 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 (31)

In the information recording processing apparatus,
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium A DC control bit selection unit that performs bit selection processing;
A modulation data generating unit that performs data modulation processing on recording target data and DC control bit setting processing to generate a modulated recording frame as recording unit data, and performs DC control bit setting processing based on DSV control, or the DC A modulation data generation unit that selectively executes DC control bit setting processing based on input information from the control bit selection unit;
An information recording processing apparatus comprising: The DC control bit selector is
The additional data selected from the recording target data includes the DC control bit set in the additional data correspondence determination DC control bit storage frame selected from the recording target data in accordance with the configuration bit value of the additional data recorded in the information recording medium. 2. The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute a selection process of selecting a value that matches or does not match the bit information of correspondence determination user control data (UCD). . The DC control bit selector is
Eight values that are set in the additional data correspondence determination DC control bit storage frame selected from the recording target data are set to values that match the 8-bit information of the additional data correspondence determination user control data (UCD) selected from the recording target data. The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute a selection process as to whether or not to set as a DC control bit. The DC control bit selector is
One unit of 8-bit user control data (UCD) selected from the data to be recorded is input as additional data correspondence determination user control data (UCD), and the additional data according to the value of the additional data constituting bits to be recorded The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute a process of setting values of eight DC control bits to be set in a correspondence determination DC control bit storage frame. The DC control bit selection unit further includes:
It is a configuration that executes a process of setting a value corresponding to a configuration bit value of additional data to be recorded on an information recording medium as one unit of 8-bit user control data (UCD) selected from data to be recorded. The information recording processing apparatus according to claim 1. The modulation data generation unit
At least a part of the DC control bits set in the additional data correspondence determination DC control bit storage frame selected from the recording target data is set based on the DC control bit information input from the DC control bit selection unit, The information recording processing apparatus according to claim 1, wherein the DC control bit is configured to execute processing for setting based on DSV measurement. 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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding unit that executes processing for acquiring additional data configuration bit information;
An information reproduction processing apparatus comprising: The additional data decoding unit
Configuration for determining whether the additional data configuration bit is 1 or 0 depending on whether or not there is a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD) The information reproduction processing apparatus according to claim 10, wherein: The additional data decoding unit
The presence / absence of a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD) is determined, and the additional data correspondence determination user control data ( 11. The information reproduction processing apparatus according to claim 10, wherein the information reproduction processing apparatus is configured to perform processing for acquiring the configuration bits of UCD) as additional data configuration bits. An information recording medium,
Information having a configuration in which additional data that can be analyzed based on a correspondence relationship between a bit value of specific user control data (UCD) included in the recording data and a DC control bit set in the recording data is recorded recoding media. The information recording medium is
According to the configuration bit value of the recording additional data, the recording data based on the recording frame generated by controlling the presence / absence of the correspondence between the user control data (UCD) and the DC control bit set in the recording frame is stored. The information recording medium according to claim 13, wherein the information recording medium is provided. 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 13, wherein the information recording medium is a recording medium. The information recording medium is
14. The information recording medium according to claim 13, 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 13, 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,
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium DC control bit selection step for performing bit selection processing;
This is a modulation data generation step for executing a data modulation process for recording target data and a DC control bit setting process to generate a modulated recording frame as recording unit data, a DC control bit setting process based on DSV control, or the DC A modulation data generation step for selectively executing a DC control bit setting process based on the selection information in the control bit selection step;
An information recording processing method characterized by comprising: The DC control bit selection step includes:
The additional data selected from the recording target data includes the DC control bit set in the additional data correspondence determination DC control bit storage frame selected from the recording target data in accordance with the configuration bit value of the additional data recorded in the information recording medium. 19. The information recording processing method according to claim 18, wherein selection processing is performed to select a value that matches or does not match the bit information of the user control data for correspondence determination (UCD). The DC control bit selection step includes:
Eight values that are set in the additional data correspondence determination DC control bit storage frame selected from the recording target data are set to values that match the 8-bit information of the additional data correspondence determination user control data (UCD) selected from the recording target data. 19. The information recording processing method according to claim 18, wherein a selection process for determining whether to set as a DC control bit is executed. The DC control bit selection step includes:
One unit of 8-bit user control data (UCD) selected from the data to be recorded is input as additional data correspondence determination user control data (UCD), and the additional data according to the value of the additional data constituting bits to be recorded 19. The information recording processing method according to claim 18, wherein a process of setting values of eight DC control bits to be set in a correspondence determination DC control bit storage frame is executed. The information recording processing method further includes:
And a step of executing a process of setting a value corresponding to a constituent bit value of additional data to be recorded on the information recording medium as one unit of 8-bit user control data (UCD) selected from the data to be recorded. The information recording processing method according to claim 18. The modulation processing step includes
At least a part of the DC control bits set in the additional data correspondence determination DC control bit storage frame selected from the recording target data is set based on the DC control bit information input from the DC control bit selection unit, 19. The information recording processing method according to claim 18, further comprising a step of executing a process for setting the DC control bit based on the DSV measurement. 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 18. The modulation data generation step includes
19. The information recording processing method according to claim 18, 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
19. The information recording processing method according to claim 18, 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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding step for executing processing for acquiring additional data configuration bit information;
An information reproduction processing method characterized by comprising: The additional data decoding step includes:
A process for determining whether the additional data configuration bit is 1 or 0 is performed according to whether or not there is a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD). The information reproduction processing method according to claim 27. The additional data decoding step includes:
The presence / absence of a correspondence between the additional data correspondence determination DC control bit and the additional data correspondence determination user control data (UCD) is determined, and the additional data correspondence determination user control data ( 28. The information reproduction processing method according to claim 27, wherein a process of acquiring a constituent bit of (UCD) as an additional data constituent bit is performed. A computer program for executing information recording processing;
DC control of whether the value of the DC control bit set in the recording frame is a value that matches or does not match the user control data (UCD) according to the configuration bit value of the additional data to be recorded on the information recording medium DC control bit selection step for performing bit selection processing;
This is a modulation data generation step for executing a data modulation process for recording target data and a DC control bit setting process to generate a modulated recording frame as recording unit data, a DC control bit setting process based on DSV control, or the DC A modulation data generation step for selectively executing a DC control bit setting process based on input information from the control bit selection 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;
A correspondence determination process between the additional data correspondence determination DC control bit acquired from the additional data correspondence determination DC control bit storage frame and the additional data correspondence determination user control data (UCD) is executed, and based on the correspondence determination result An additional data decoding step for executing processing for acquiring additional data configuration bit information;
A computer program characterized by comprising:

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