JP2005085426A - Information recording processing device, information reproduction processing device, information recording medium, method and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which records additional information difficult to analyze to an information recording medium and reproduces the additional information, and also provide a medium and a method therefor. <P>SOLUTION: When additional data, for example, key information applied for decoding content, key generation information, content reproduction control information, copy control information and so on, are recorded to an information recording medium, a DC control bit value to be embedded in a recording frame corresponding to specifically selected additional data is determined in accordance with the configuration bit information of the additional data, that is, "0" or "1", and the parity of data corresponding to the additional data, that is, "an even number" or "an odd number", and then the parity of the recording frame is adjusted. In the reproduction processing device, additional configuration bit information is obtained by detecting the parities of the data corresponding to the additional data and recording frame whose DC control bit is adjusted. <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, various additional information such as key information, content reproduction control information, and copy control information applied to content decryption processing are added to an information recording medium for recording content such as image data and music data. Information can be recorded and read in a form that is difficult to analyze by combining the data characteristics of a specific data area, such as user control information, and the data characteristics of a specific recording data, for example, a recording frame with adjusted DC control bits. The present invention relates to an information recording processing device, an information reproduction processing device, an information recording medium and method, and a computer program.

  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 is necessary for generating encryption key information or encryption key to be used for the use of the encrypted content. A configuration has been proposed in which information or various control information such as content reproduction control and copy control is stored in an information recording medium as secret information. A configuration in which a playback processing program executed in a playback device of a user reads secret information such as a key corresponding to the content to be played, decrypts the content according to the read secret information, and executes use of the content according to the playback control information It is.

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

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

  The present invention has been made in view of the above-described problems. For example, an encryption key stored in a recording medium together with content, encryption key generation information, content reproduction control information, content copy control information, or other content attribute information. , Information recording processing apparatus, information reproduction processing apparatus, information recording medium, and method capable of recording various additional information in a manner that cannot be read by a general data reading process and making illegal data reading difficult And a computer program.

  More specifically, by a combination of data characteristics of a specific data area such as user control information and data characteristics of a specific recording data, that is, a recording frame in which a DC control bit is adjusted according to a configuration bit of additional data It is an object of the present invention to provide an information recording processing device, an information reproduction processing device, an information recording medium and method, and a computer program that can be recorded and read in a form that is difficult to analyze.

The first aspect of the present invention is:
In the information recording processing apparatus,
Modulation data generating means for executing data modulation processing on recording target data and generating a modulation recording frame;
Data characteristic determining means for determining the data characteristic of the additional data corresponding data;
DC control bit indicating means for determining a value of a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
The modulation data generation means includes
The information recording processing apparatus has a configuration for executing a generation process of a recording frame corresponding to additional data in which the DC control bit determined by the DC control bit instruction means is set.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the data characteristic of the additional data corresponding data is a characteristic of whether the parity of the constituent data of the additional data corresponding data is an even number or an odd number, The DC control bit instruction means is based on the above two conditions whether the configuration bit value of the additional data is 0 or 1, and whether the parity of the additional data corresponding data is even or odd. Thus, the processing for determining the bit value of the DC control bit set in the recording frame corresponding to the additional data is executed.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the DC control bit instruction means determines whether the parity of the constituent data of the recording frame corresponding to the additional data is an even number or an odd number. The configuration is controlled by value setting.

  Furthermore, in an embodiment of the information recording processing apparatus of the present invention, the information recording processing apparatus is configured to select the additional data corresponding data from configuration data of user control data (UCD). Features.

  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 content copy control information is set as configuration information of at least one piece of information.

  Furthermore, in one embodiment of the information recording processing apparatus of the present invention, the modulated data generating means generates a modulated recording frame by executing a data conversion process 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 modulated data generating means is configured to execute a modulated recording frame generating process including a process of converting 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 demodulator that performs demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics A decoding unit;
The information reproduction processing apparatus is characterized by comprising:

  Furthermore, in one embodiment of the information reproduction processing apparatus of the present invention, the data characteristics of the additional data-compatible data and the data characteristics of the additional data-compatible recording frame are whether the parity of each component data is even or odd. The additional data decoding unit, whether the parity of the additional data correspondence data is even or odd, whether the parity of the configuration data of the additional data correspondence recording frame is even or odd, The present invention is characterized in that the additional data component bit information acquisition process is executed based on the two data characteristic determinations.

  Furthermore, in one embodiment of the information reproduction processing apparatus of the present invention, in the additional data decoding unit, the additional data corresponding data part for which the data characteristic is to be discriminated is user control data (UCD: User Control Data). Features.

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

Furthermore, the third aspect of the present invention provides
An information recording medium,
Stores modulation data based on multiple recording frames,
An information recording medium having a configuration in which modulation data based on a recording frame in which a DC control bit is adjusted based on a configuration bit value of additional data and data characteristics of specific additional data corresponding data is stored.

  Furthermore, in one embodiment of the information recording medium of the present invention, the data characteristic of the additional data corresponding data is a characteristic of whether the parity of the configuration data is an even number or an odd number, and the information recording medium includes the additional data And the modulation data based on the recording frame in which the DC control bit is adjusted based on two conditions of whether the parity of the configuration data of the additional data corresponding data is an even number or an odd number. It is characterized by that.

  Furthermore, in an embodiment of the information recording medium of the present invention, the recording frame in which the DC control bits recorded on the information recording medium are adjusted includes the configuration bit value of the additional data and the parity of the configuration data of the additional data corresponding data. Whether the parity of the constituent data of the recording frame is an even number or an odd number based on the above two conditions, and the DC control bit adjusted according to the determination information is determined. It is a recording frame provided.

  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 piece of information.

  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,
A DC control bit determining step for determining a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
A modulation data generation step of generating a recording frame corresponding to additional data in which the DC control bit determined in the DC control bit determination step is set, and performing a data modulation process to generate a modulation recording frame;
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 determining step includes determining whether the constituent bit value of the additional data is 0 or 1, and the parity of the additional data corresponding data is an even number. It is a step of executing a process of determining a bit value of a DC control bit set in the additional data-corresponding recording frame based on the above two conditions.

  Further, in one embodiment of the information recording processing method of the present invention, the DC control bit determining step determines whether the parity of the constituent data of the recording frame corresponding to the additional data is an even number or an odd number. The method includes a step of controlling by setting.

  Furthermore, in an embodiment of the information recording processing method of the present invention, the information recording processing method further includes a step of selecting the additional data corresponding data from configuration data of user control data (UCD). It is characterized by that.

  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 piece of content copy control information.

  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 demodulation step for performing demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics Decoding step;
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 includes determining whether the parity of the additional data corresponding data is an even number or an odd number, or the parity of the constituent data of the additional data corresponding recording frame. Whether or not is an even number or an odd number is determined based on the above two data characteristic determinations, and additional data component bit information acquisition processing is executed.

  Furthermore, in one embodiment of the information reproduction processing method according to the present invention, the additional data decoding step includes the component data of user control data (UCD: User Control Data) as an additional data corresponding data portion to be determined for data characteristics. Decoding is performed.

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

Furthermore, the sixth aspect of the present invention provides
A computer program for executing information recording processing;
A DC control bit determining step for determining a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
A modulation data generation step of generating a recording frame corresponding to additional data in which the DC control bit determined in the DC control bit determination step is set, and performing a data modulation process to generate a modulation recording frame;
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 demodulation step for performing demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics Decoding step;
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, additional data is recorded on the information recording medium, for example, information recording for recording additional information such as key information, key generation information, content reproduction control information, and copy control information applied to content decryption processing. In the processing apparatus, DC control embedded in a specific selected additional data-corresponding recording frame in accordance with the configuration bit information [0] or [1] of the additional data and the data characteristics of the specific selected additional data-corresponding data The bit value is determined and set. Further, the reproduction processing apparatus detects the data characteristics of the additional data compatible data, the data characteristics of the additional data compatible recording frame in which the DC control bit is adjusted in accordance with the additional data, and detects these two data characteristics to add the configuration. Bit information [0] or [1] is acquired. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content playback control information and copy control information that is applied to content decryption processing in a manner that is difficult to analyze, and to reliably read during playback. Is done.

  According to the configuration of the present invention, additional data is recorded on the information recording medium, for example, information recording for recording additional information such as key information, key generation information, content reproduction control information, and copy control information applied to content decryption processing. In the processing apparatus, whether the parity of the configuration data of the additional data component bit information [0] or [1] and the specific selected additional data corresponding data, for example, user control information (UCD: User Control Data), is even or odd. Accordingly, the DC control bit value embedded in a specific selected additional data-corresponding recording frame is determined, and the parity of the recording frame is adjusted. Further, in the reproduction processing device, whether the parity of the additional data correspondence data is even or odd, and whether the parity of the configuration data of the additional data correspondence recording frame in which the DC control bit is adjusted according to the additional data is even or odd, By detecting these two parities, additional configuration bit information [0] or [1] is obtained. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content playback control information and copy control information that is applied to content decryption processing in a manner that is difficult to analyze, and to reliably read during playback. Is done.

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

  The configuration and processing of the information recording processing apparatus will be described with reference to FIG. The information recording processing apparatus includes an information recording medium 101 that can record data, a pickup 102 that outputs a data recording signal to the information recording medium 101, a spindle motor 103 that drives the information recording medium 101, a control of the pickup 102 and the spindle motor 103. Servo circuit 104, additional data error correction encoding unit 105, main data error correction encoding unit 106, additional data corresponding recording frame control unit 107, switch 108, modulation data generation unit 109, DC control bit instruction means 110, recording The signal processing circuit 111 and the additional data correspondence data characteristic determination unit 112 are configured.

  The content data to be recorded on the information recording medium 101 is, for example, encrypted content data, and is input to the main data error correction encoding unit 106 as main data. The main data error correction encoding unit 106 receives an error with respect to the input data. An encoding process for generating and adding a correction code is performed.

  Thereafter, the modulation data generation unit 109 performs modulation processing. The information recording processing apparatus according to the present invention performs modulation based on an RLL (1, 7) modulation method based on modulation of 2-bit data into 3-bit data.

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

  Based on the modulated data, 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.

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

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

  In the present invention, the setting of the DC control bit for the specific selected additional data-corresponding DC control bit adjustment recording frame is not the bit selection according to the above rule but the constituent bits of the additional data and the specific data area, For example, “0” or “1” of a DC control bit (DC-Control bit) is selected and inserted based on data characteristics of specific user control data. This process will be described later.

  Details of the modulation data generation processing executed in the modulation data generation unit 109 will be described with reference to FIGS. 2 and 3.

  The recording data includes user data 201 and user control data (UCD) 211 as shown in FIG. User data 201 is data including actual data of reproduction target data such as content, and user control data (UCD: User Control Data) 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, user control data (UCD: User Control Data) 211 is combined with 16 × 9 bytes of physical address data 221 to generate an access block 212 of 24 columns × 30 rows. A BIS block 213 is generated as a data block in which a parity of 32 rows (row) is added to each column, and a BIS cluster 214 of 3 columns × 496 rows is generated by interleaving for the BIS block 213.

  FIG. 3D shows the same data as FIG. 2D, that is, 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 generated based on this.

  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 32 columns (columns), and a BIS cluster of 3 columns × 496 rows. 214 is divided into three parts (i to iii) in units of one column (column), 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 control bit adjustment recording frame corresponding to the specific selected additional data is not subjected to bit selection according to the above rule but added. A DC control bit “0” or “1” is selected and inserted based on a data configuration bit and a specific data area, for example, data characteristics of specific user control data. This process will be described later.

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

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

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

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

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

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

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

  FIG. 5 shows an NRZI generation processing configuration as a recording signal executed in the recording signal processing circuit 111. Channel bits as 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, the characteristics of controllable data that does not affect the actual data such as content such as user control information (UCD) and the specific recording data are recorded in the additional data. It has a configuration that enables recording and reading in a form that is difficult to analyze by combining with the characteristics of (recording frame).

For example,
(1) A specific data area, for example, part of user control data is selected as data corresponding to additional data, and data characteristics of the selected data area, specifically, for example, parity is even or odd. Some data characteristics,
(2) A specific recording frame is selected, the selected recording frame is set as a recording frame in which the setting value of the DC control bit can be adjusted, and the total parity of the configuration data of the recording frame is an even number, or Is an odd number,
By controlling the combination of the data characteristics of the specific data (1) and the data characteristics of the DC control bit adjustment recording frame (2), the configuration bit [0] or [1] of the additional data is indicated.

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

  As described with reference to FIGS. 2 and 3, the user control data (UCD) 211 is combined with the physical address data 221 of 16 × 9 bytes, and the access block 212 of 24 columns × 30 rows. Is generated, a BIS block 213 is generated as a data block in which a parity of 32 rows is added to each column for the access block 212. 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 a physical address of 3 rows, user control data (UCD) of 12 rows, and parity of 16 rows. One unit of 3 columns (column) × 31 rows (row) is set. A BIS cluster 214 of 3 columns × 496 rows is configured by 16 units of units 0 to 15.

  As shown in FIG. 7, the BIS cluster having this configuration is divided into four divided data I of the 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 .about.IV.

  As shown in FIG. 7, the ECC cluster is set as a cluster obtained by combining a BIS cluster of 3 columns (columns) × 496 rows (row) with an LDC cluster of 152 columns (columns) × 496 rows (row).

  As described with reference to FIG. 6, in the BIS cluster, any one of a physical address, user control data (UCD: User Control Data), and parity is set in each row. Therefore, the BIS cluster (i, ii, iii) included in each of the 496 rows of the ECC cluster 231 is any one of a physical address, user control data (UCD: User Control Data), and parity.

As shown in FIG. 8, a specific row selected from the 496 rows constituting the ECC cluster 231 is
(A) Additional data correspondence data storage frame 311
(B) DC control bit adjustment frame 321 corresponding to additional data
Set as.

  (A) In the additional data correspondence data storage frame 311, for example, a user control data area i is set as the additional data correspondence data 312. Here, the user control data area i is set as additional data corresponding data, but not limited to the user control data area i, any other data area can be set as additional data corresponding data.

  For example, as shown in FIG. 8, when the user control data area (i) is set as the additional data corresponding data 312, the data characteristics of the additional data corresponding data 312 are added in the information recording processing apparatus of the present invention shown in FIG. It is detected by the data correspondence data characteristic discriminating unit 112.

  As the data characteristic, for example, the parity of the additional data corresponding data 312 can be applied. That is, whether the parity of the configuration data (8 bits) in the user control data area i is an even number or an odd number is detected by the additional data correspondence data characteristic determination unit 112.

  Note that an even parity in a data area corresponds to an accumulated value of the number of bits 1 included in data included in the data area being an even number. The fact that the parity in a certain data area is an odd number corresponds to the cumulative value of the number of 1 included in the data included in that data area being an odd number.

  The fact that the parity of user control data (UCD), which is additional data-corresponding data, is even means that the number of [1] included in the 8 bits of the user control data (UCD) is even. The parity being odd means that the number of [1] included in 8 bits is odd.

On the other hand, (B) additional data corresponding DC control bit adjustment frame 321 shown in FIG.
Information on whether the configuration bit of the additional data is [1] or [0];
Data characteristics of the additional data corresponding data described above, for example, information on whether the parity of the additional data corresponding data 312 is even or odd,
Based on these two pieces of information, the value of the DC control bit is adjusted and set.

  This DC bit control process is executed by the DC control bit instruction means 110 shown in FIG.

  In the configuration of FIG. 1, additional data is input to the additional data error correction encoding unit 105, and an encoding process for adding an error correction code is performed. The additional data is data composed of various information such as encryption key information, encryption key generation information, content reproduction control information, content copy control information, and other content attribute information.

  The DC control bit instruction unit 110 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 is, for example, additional data error correction encoding for additional data of encryption key information, encryption key generation information, content reproduction control information, content copy control information, and other content attribute information, and the additional data. This is a bit string including the error correction code set in the unit 105.

  The additional data-corresponding recording frame control unit 107 determines whether or not the data is the target data of the additional data-corresponding recording frame subject to DC bit control processing, based on the output data from the main data error correction encoding unit 106. When the data is the target data of the additional data-corresponding recording frame subject to bit control processing, the switch 108 is turned on, and the DC control bit instruction means 110 changes the bit value of the additional information and the data characteristic (parity) of the additional data-corresponding data. DC control bit information determined based on this is output to the modulation data generation unit 109. The modulation data generation unit 109 instructs the value of the DC control bit to be added to the additional data-corresponding recording frame from the DC control bit instruction unit 110. Determine and set according to.

  As shown in FIG. 8, (A) additional data correspondence data storage frame 311 and (B) additional data correspondence DC control bit adjustment frame 321 are converted from 2 bits to 3 bits according to the RLL (1, 7) run length rule. After modulation processing is performed and a synchronization (Sync) code is added to form a modulated recording frame (see FIG. 3 (h)), the recording signal processing circuit 111 (see FIG. 1) shown in FIG. An NRZI signal generated based on the information recording medium 101 is recorded.

In the configuration of the present invention, two data areas, namely:
Additional data support data,
DC control bit adjustment recording frame corresponding to additional data;
Based on these two data, the configuration bits of the additional data are set and read.

  Details of the additional data storage processing in the present invention will be described with reference to FIGS. 9, 10, 11, and 12.

FIG.
The configuration bit of the additional data is [0],
For example, the parity of additional data corresponding data configured by user control data is an even number,
FIG. 10 is a diagram showing DC control bit adjustment processing in an additional data corresponding DC control bit adjustment recording frame.

  As a characteristic of (1, 7) RLL modulation, there is a feature that parity preserve (Parity Preserve), that is, modulation data of even parity data becomes even parity, and modulation data of odd parity data becomes odd parity. Therefore, the parity of the modulation data shown in FIG. 9B and the parity of the recording frame are the same.

  In the following, an example is shown in which parity is used as the data characteristics of the additional data-compatible data and the additional data-compatible DC control bit adjustment recording frame. However, the data characteristics are not limited to parity, and various other detectable characteristics can be used. Data characteristics can be applied.

  In the case of FIG. 9, that is, when the configuration bit of the additional data is [0] and the parity of the additional data corresponding data configured by the user control data is even parity as shown in FIG. As shown in FIG. 9 (B), the value of the DC control bit inserted in the recording frame is adjusted so that the total parity of the modulation data portion of the additional data corresponding DC control bit adjustment recording frame becomes an even parity.

  The parity adjustment can be performed only by setting the value of one DC control bit, for example, the final DC control bit, from 0 to 1 or 1 to 0 among the DC control bits set in the recording frame. By this DC control bit adjustment, the total parity of the modulation data portion of the DC control bit adjustment recording frame corresponding to additional data is set to an even parity.

As a result,
The parity of the additional data support data is even, and
The parity of the DC control bit adjustment recording frame corresponding to the additional data is even,
These two conditions are set.

In a reproducing apparatus that performs data reproduction, two data characteristics (parity) of the additional data correspondence data and the additional data correspondence DC control bit adjustment recording frame (modulation data) are detected.
The parity of the additional data support data is even, and
The parity of the DC control bit adjustment recording frame corresponding to the additional data is even,
Is detected, it is determined that the bit value of the additional data is [0]. The additional data detection process in the playback device will be described in detail later.

FIG.
The configuration bit of the additional data is [0],
The parity of the additional data support data is odd,
FIG. 10 is a diagram showing DC control bit adjustment processing in an additional data corresponding DC control bit adjustment recording frame.

  In the case of the setting shown in FIG. 10, as shown in FIG. 10B, the DC control bits inserted into the recording frame so that the total parity of the modulation data part of the DC control bit adjustment recording frame corresponding to the additional data becomes an odd parity. Adjust the value of.

As a result,
The parity of the data corresponding to the additional data is odd and
Additional data corresponding DC control bit adjustment The parity of the recording frame is odd,
These two conditions are set.

In a reproducing apparatus that performs data reproduction, two data characteristics (parity) of the additional data correspondence data and the additional data correspondence DC control bit adjustment recording frame (modulation data) are detected.
The parity of the data corresponding to the additional data is odd and
Additional data corresponding DC control bit adjustment The parity of the recording frame is odd,
Is detected, it is determined that the bit value of the additional data is [0].

FIG.
The configuration bit of the additional data is [1],
The parity of the data corresponding to additional data is even,
FIG. 10 is a diagram showing DC control bit adjustment processing in an additional data corresponding DC control bit adjustment recording frame.

  In the case of the setting of FIG. 11, as shown in FIG. 11B, the DC control bits inserted into the recording frame so that the total parity of the modulation data part of the DC control bit adjustment recording frame corresponding to additional data becomes an odd parity. Adjust the value of.

As a result,
The parity of the additional data support data is even, and
Additional data corresponding DC control bit adjustment The parity of the recording frame is odd,
These two conditions are set.

In a reproducing apparatus that performs data reproduction, two data characteristics (parity) of the additional data correspondence data and the additional data correspondence DC control bit adjustment recording frame (modulation data) are detected.
The parity of the additional data support data is even, and
Additional data corresponding DC control bit adjustment The parity of the recording frame is odd,
Is detected, it is determined that the bit value of the additional data is [1].

FIG.
The configuration bit of the additional data is [1],
The parity of the additional data support data is odd,
FIG. 10 is a diagram showing DC control bit adjustment processing in an additional data corresponding DC control bit adjustment recording frame.

  In the case of the setting of FIG. 12, as shown in FIG. 12B, the DC control bits inserted into the recording frame so that the total parity of the modulation data part of the DC control bit adjustment recording frame corresponding to additional data becomes an even parity. Adjust the value of.

As a result,
The parity of the data corresponding to the additional data is odd and
The parity of the DC control bit adjustment recording frame corresponding to the additional data is even,
These two conditions are set.

In a reproducing apparatus that performs data reproduction, two data characteristics (parity) of the additional data correspondence data and the additional data correspondence DC control bit adjustment recording frame (modulation data) are detected.
The parity of the data corresponding to the additional data is odd and
The parity of the DC control bit adjustment recording frame corresponding to the additional data is even,
Is detected, it is determined that the bit value of the additional data is [1].

FIG. 13 shows an additional data embedding rule in the present invention, that is,
Additional data bits,
Parity of data corresponding to additional data,
A table summarizing the correspondence of the parity of the DC control bit adjustment recording frame corresponding to additional data is shown.

FIG. 13 shows the patterns (1) to (4) described in FIGS. 9 to 12.
(1)
The configuration bit of the additional data is [0], and
This is a case where the parity of the additional data corresponding data is an even number,
in this case,
DC control bit adjustment for additional data The DC control bit is adjusted so that the parity of the recording frame is an even number.
(2)
The configuration bit of the additional data is [0], and
This is the case where the parity of the additional data corresponding data is an odd number,
in this case,
DC control bit adjustment for additional data The DC control bit is adjusted so that the parity of the recording frame becomes an odd number.
(3)
The configuration bit of the additional data is [1], and
This is a case where the parity of the additional data corresponding data is an even number,
in this case,
DC control bit adjustment for additional data The DC control bit is adjusted so that the parity of the recording frame becomes an odd number.
(4)
The configuration bit of the additional data is [1], and
This is the case where the parity of the additional data corresponding data is an odd number,
in this case,
DC control bit adjustment for additional data The DC control bit is adjusted so that the parity of the recording frame is an even number.

During playback on a playback device,
Parity of additional data support data,
Two parities with the parity of the DC control bit adjustment recording frame corresponding to additional data are detected,
It is determined which of the above (1) to (4) matches, and it is determined whether the constituent bits of the additional data are [0] or [1].

  Next, with reference to FIG. 14, an 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 data composed of various information such as encryption key information, encryption key generation information, content reproduction control information, content copy control information, and other content attribute information, and error correction is added to these additional data. A bit string of additional data to which a code is added, 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 the constituent bits of the additional data, for example, [0, 0, 0, 1, 0, 0, 0. In step S103, additional data-corresponding data is acquired, and the data characteristic of the additional data-corresponding data, that is, the parity is checked and confirmed. This process is executed by the additional data correspondence data characteristic determination unit 112 in FIG. 1 and the result is output to the DC control bit instruction means 110.

  As the additional data corresponding data, for example, a partial data area of user control information (UCD: User Control Data), for example, 8-bit data is selectively applied. The parity of the 8-bit data is verified. Note that the additional data corresponding data is not limited to user control information (UCD: User Control Data) and can be selected from any other data area.

  In step S104, a bit string of additional data to be embedded, that is, a bit string of additional data in which an error correction code is added to the additional data described above, for example, [0, 0, 0, 1, 0, 0, 0. ], It is determined whether or not the bits extracted in order are [0].

  If the extracted bit is [0], it is determined in step S105 whether or not the parity of the additional data corresponding data confirmed in step S103 is an even number.

  If the parity of the additional data-corresponding data is an even number, the process advances to step S107 to adjust the DC control bit so that the total parity of the additional data-corresponding DC control bit adjustment recording frame becomes an even parity, and the additional data-corresponding DC control bit Generate adjusted recording frames.

  Details of this processing will be described with reference to FIG. First, whether or not the additional data-corresponding recording frame control unit 107 in FIG. 1 is the target data of the additional data-corresponding recording frame subject to DC bit control processing, based on the output data from the main data error correction encoding unit 106. Determine.

  When the additional data-corresponding recording frame control unit 107 determines that the data is the target data of the additional data-corresponding recording frame subject to DC bit control processing, the switch 108 is turned ON, and the DC control bit instruction means 110 Then, DC control bit information determined based on the data characteristics (parity) of the additional data corresponding data is output to the modulation data generation unit 109.

  The modulation data generation unit 109 determines and sets the value of the DC control bit to be added to the additional data-corresponding recording frame according to the instruction from the DC control bit instruction unit 110.

  In the process of step S107, the DC control bit is adjusted so that the total parity of the DC control bit adjustment recording frame corresponding to additional data becomes an even parity, and a DC control bit adjustment recording frame corresponding to additional data is generated.

in this case,
Parity of data corresponding to additional data = even number Parity of DC control bit adjustment recording frame corresponding to additional data = even number,
It corresponds to the setting of FIG. 9, FIG. 13 (1),
The bit value of the additional data = [0] is set.

  If it is determined in step S105 that the parity of the additional data-corresponding data is not an even number but an odd number, the process proceeds to step S108, and the DC control bits are adjusted so that the total parity of the additional data-corresponding DC control bit adjustment recording frame becomes an odd parity. Are adjusted to generate a DC control bit adjustment recording frame corresponding to additional data.

in this case,
Parity of data corresponding to additional data = odd number Parity of DC control bit adjustment recording frame corresponding to additional data = odd number,
It corresponds to the setting of FIG. 10, FIG. 13 (2),
The bit value of the additional data = [0] is set.

  Furthermore, the determination in step S104 is No, that is, extraction is sequentially performed from a bit string of additional data in which an error correction code is added to the additional data, for example, [0, 0, 0, 1, 0, 0, 0. If the generated bit is [1] instead of [0], the process proceeds to step S106.

  In step S106, it is determined whether the parity of the additional data corresponding data is even or odd. If it is determined that the parity of the additional data-corresponding data is an even number, the process advances to step S108 to adjust the DC control bits so that the total parity of the additional data-corresponding DC control bit adjustment recording frame is an odd parity, and the additional data A corresponding DC control bit adjustment recording frame is generated.

in this case,
Parity of data corresponding to additional data = even number Parity of DC control bit adjustment recording frame corresponding to additional data = odd number,
This corresponds to the settings in FIGS. 11 and 13 (3).
The bit value of the additional data = [1] is set.

  If it is determined in step S106 that the parity of the additional data-corresponding data is an odd number, the process proceeds to step S107, and the DC control bit is adjusted so that the total parity of the additional data-corresponding DC control bit adjustment recording frame is an even parity. Thus, a DC control bit adjustment recording frame corresponding to additional data is generated.

in this case,
Parity of data corresponding to additional data = odd number Parity of DC control bit adjustment recording frame corresponding to additional data = even number,
This corresponds to the settings in FIGS. 12 and 13 (4).
The bit value of the additional data = [1] is set.

  In step S109, modulation processing of additional data-corresponding data and modulation processing of additional data-corresponding DC control bit adjustment recording frame is executed. In step S110, it is determined whether or not processing of the last bit of additional data has been completed. If there is processing data, the processing after step S102 is repeatedly executed.

  In step S110, the determination is made that there is no unprocessed data, and the processing ends, that is, recording data into which additional information bits are inserted is generated according to the above-described processing.

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

  The configuration and processing of the data reproduction processing device will be described with reference to FIG. The data 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, and a data demodulation processing unit 407 that executes data demodulation processing.

  Further, the recording frame corresponding to the additional data in which the DC control bit is adjusted based on the additional data bit is detected, and the switch 410 is operated in response to the detection of the recording frame corresponding to the additional data, and the recording frame corresponding to the additional data is converted into the additional data. The additional data corresponding recording frame control unit 411 to be output to the decoding unit 408, for example, detects additional data corresponding data set in user control information (UCD: User Control Data) and the like, and switches according to the detection of the additional data corresponding data. 413 is operated, the additional data corresponding data control unit 414 for outputting the additional data corresponding data to the additional data decoding unit 408, the additional data decoding unit 408 for executing the decoding process of the additional data, the error of the main data Main data error correcting unit 412 performs correction processing, with the additional data error correction section 409 performs error correction processing of the additional data.

  The content data stored in the information recording medium 401 is, for example, encrypted content data, and the additional data stored in the information recording medium 401 is key data applied to decryption processing of encrypted content, or key generation information, Or content reproduction control information, content copy control 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 corresponding recording frame control unit 411. The additional data-corresponding recording frame control unit 411 discriminates the area of the additional data-corresponding recording frame on which the DC control bit adjustment processing has been performed based on the synchronization signal input from the synchronization detection unit 406, and based on the discrimination information. The modulation data of the additional data-corresponding recording frame in which the DC control bit is adjusted based on the additional data bit is input to the additional data decoding unit 408 that controls the switch 410 and executes the decoding process of the additional data-corresponding recording frame.

  Further, the read data of the information recording medium 401 is output from the synchronization detecting unit 406 to the data demodulating unit 407, and the reverse data conversion described above with reference to FIGS. 2 and 3 is sequentially executed. The additional data correspondence data control unit 414 discriminates the area of the additional data correspondence data based on the information input from the data demodulation unit 407, controls the switch 413 based on the discrimination information, and decodes the additional data correspondence data. The additional data corresponding data is input to the additional data decoding unit 408 that executes processing.

The additional data decoding unit 408 receives two input data, that is,
Modulation data of a recording frame corresponding to additional data in which the DC control bit is adjusted based on the additional data bit,
Additional Data Corresponding Data A decoding process for acquiring additional data is executed based on these two data.

That is,
Data characteristics (parity) of the modulation data of the recording frame for additional data,
Data characteristics (parity) of additional data support data,
These two data characteristics (parity) are detected, and it is determined whether the constituent bits of the additional data are [0] or [1] based on the detection information.

That is, it is determined whether the constituent bits of the additional data are [0] or [1] according to the rule described above with reference to FIG.
In particular,
The parity of the additional data corresponding data is an even number,
If the parity of the DC control bit adjustment recording frame corresponding to additional data is an even number,
It is determined that the configuration bit of the additional data is [0].
Also,
The parity of the additional data corresponding data is an odd number,
If the parity of the DC control bit adjustment recording frame corresponding to additional data is an odd number,
It is determined that the configuration bit of the additional data is [0].

Also,
The parity of the additional data corresponding data is an even number,
If the parity of the DC control bit adjustment recording frame corresponding to additional data is an odd number,
It is determined that the configuration bit of the additional data is [1].
Also,
The parity of the additional data corresponding data is an odd number,
If the parity of the DC control bit adjustment recording frame corresponding to additional data is an even number,
It is determined that the configuration bit of the additional data is [1].

Thus, in the playback device, the following data read from the recording medium, that is,
Additional data support data,
DC control bit adjustment recording frame corresponding to additional data Based on these two data characteristics (parity), it is possible to identify whether the additional information bit is [0] or [1].

The additional data decoding unit 408 is data necessary for decoding the additional data input intermittently, that is,
Additional data support data,
The same processing is performed based on the DC control bit adjustment recording frame corresponding to additional data, for example, key data of n-bit information, key generation information, content reproduction control information, content copy control information, other content attribute information, etc. Get additional data. The additional data includes an error correction code as described in the description of the data recording processing apparatus, 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 data applied to the analysis processing of the additional data, the read data of the information recording medium is output from the synchronization detecting unit 406 to the data demodulating unit 407, and with reference to FIGS. The reverse data conversion described above is sequentially executed to obtain reproduction data.

  The main data, which is demodulated data, also includes an error correction code, like the additional data, and is output after being corrected by the main data error correction unit 412.

  When the output 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 via an output unit such as a display or a speaker. Is output.

  Next, a reproduction processing sequence including additional information reading will be described with reference to FIG. The process of FIG. 16 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,
DC control bit adjustment recording frame corresponding to additional data;
Additional data support data,
Two data characteristics (parity) based on each are calculated.

  In FIG. 15, the DC control bit adjustment recording frame corresponding to additional data is configured to be input to the additional data decoding unit as data before demodulation, but as described above, (1, 7) RLL modulation is performed. As a characteristic, there is a feature that parity preserve (Parity Preserve), that is, modulation data of even parity data becomes even parity, and modulation data of odd parity data becomes odd parity. Therefore, the parity of the modulation data and the parity of the recording frame obtained in the demodulation process are the same, and either may be set as a detection target.

  In step S203, it is determined whether or not the parity of the DC control bit adjustment recording frame corresponding to additional data or the modulated data thereof is an even number. If it is even, it is further determined in step S204 whether or not the parity of the additional data corresponding data is even. If it is an even number, it is determined in step S206 that the additional data bit = 0 (corresponding to FIG. 9 and FIG. 13 (1)), and if it is an odd number, it is determined in step S207 that the additional data bit = 1 (FIG. 12, This corresponds to FIG.

  If it is determined in step S203 that the DC control bit adjustment recording frame corresponding to the additional data or the parity of the modulation data is an odd number, it is further determined in step S205 whether or not the parity of the additional data corresponding data is an even number. The If it is even, it is determined that the additional data bit is 1 in step S207 (corresponding to FIG. 11 and FIG. 13 (3)), and if it is odd, it is determined that the additional data bit is 0 in step S206 (FIG. 10, FIG. 10). Corresponding to FIG.

  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.

  In the above-described embodiment, the example using the parity information has been mainly described. However, the parity is an example of the state information of the data area, and various other state values that can be detected can be applied. . That is, various information other than parity can be applied as long as it is obtained from data.

  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, recording of additional data on the information recording medium, for example, key information applied to content decryption processing, key generation information, content reproduction control information, copy control information, etc. In an information recording processing apparatus for recording various additional data, the bit value information of the bit value [0] or [1] as the constituent bit information of the additional data and the data characteristics of the specific selected additional data corresponding data Accordingly, the configuration is such that the value of the DC control bit to be embedded in a specific selected recording frame corresponding to additional data is determined and set. Further, the reproduction processing apparatus detects the data characteristics of the additional data compatible data, the data characteristics of the additional data compatible recording frame in which the DC control bit is adjusted in accordance with the additional data, and detects these two data characteristics to add the configuration. Bit information [0] or [1] is acquired. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content playback control information and copy control information that is applied to content decryption processing in a manner that is difficult to analyze, and to reliably read during playback. Is done. Therefore, for example, content that requires copyright protection is stored in a recording medium, and it is difficult to analyze additional information such as key information, key generation information, content reproduction control information, and copy control information applied to the decryption processing of the content. The present invention can be applied to an information recording processing apparatus, an information reproduction processing apparatus, and an information recording medium when it is necessary to embed in various forms.

  According to the configuration of the present invention, additional data is recorded on an information recording medium, for example, various additional data such as key information, key generation information, content reproduction control information, and copy control information applied to content decryption processing are recorded. In the information recording processing device, bit value information of bit value [0] or [1] as constituent bit information of additional data and specific selected additional data corresponding data, for example, user control information (UCD: User Control Data) Depending on whether the parity of the configuration data is an even number or an odd number, the value of the DC control bit embedded in the recording frame corresponding to the selected additional data is determined, and the parity of the recording frame is adjusted. Further, in the reproduction processing device, whether the parity of the additional data correspondence data is even or odd, and whether the parity of the configuration data of the additional data correspondence recording frame in which the DC control bit is adjusted according to the additional data is even or odd, By detecting these two parities, additional configuration bit information [0] or [1] is obtained. With this configuration, for example, it is possible to embed key information, key generation information, or additional information such as content playback control information and copy control information that is applied to content decryption processing in a manner that is difficult to analyze, and to reliably read during playback. Is done. Therefore, for example, content that requires copyright protection is stored in a recording medium, and it is difficult to analyze additional information such as key information, key generation information, content reproduction control information, and copy control information applied to the decryption processing of the content. The present invention can be applied to an information recording processing apparatus, an information reproduction processing apparatus, and an information recording medium when it is necessary to embed in various forms.

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 which sets additional data. It is a figure explaining additional data corresponding user control data and additional data corresponding recording frame. It is a figure explaining the example of a data setting process based on the additional data performed in this invention. It is a figure explaining the example of a data setting process based on the additional data performed in this invention. It is a figure explaining the example of a data setting process based on the additional data performed in this invention. It is a figure explaining the example of a data setting process based on the additional data performed in this invention. It is a figure explaining the data setting process rule based on the additional data performed in this invention. It is a 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 flowchart explaining the additional data reading and data reproduction | regeneration processing sequence which are 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 error correction encoding part 107 Additional data corresponding recording frame control part 108 Switch 109 Modulation data generation part 110 Recording frame characteristic discrimination means 111 Recording signal processing 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 information (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 Additional Data Corresponding Data Storage Frame 312 Additional Data Corresponding Data 321 Additional Data Corresponding DC Control Bit Adjustment 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, 413 Switch 411 Recording frame control unit corresponding to additional data 412 Main data error Correction unit 414 Data control unit for additional data

Claims (30)

In the information recording processing apparatus,
Modulation data generating means for executing data modulation processing on recording target data and generating a modulation recording frame;
Data characteristic determining means for determining the data characteristic of the additional data corresponding data;
DC control bit indicating means for determining a value of a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
The modulation data generation means includes
An information recording processing apparatus having a configuration for executing a generation process of a recording frame corresponding to additional data in which a DC control bit determined by the DC control bit instruction means is set. The data characteristics of the additional data corresponding data are:
It is a characteristic whether the parity of the configuration data of the additional data corresponding data is an even number or an odd number,
The DC control bit instruction means includes:
Whether the configuration bit value of the additional data is 0 or 1, and
Whether the parity of the additional data corresponding data is even or odd,
2. The information recording processing apparatus according to claim 1, wherein the information recording processing apparatus is configured to execute a process of determining a bit value of a DC control bit set in the recording frame corresponding to the additional data based on the two conditions. The DC control bit instruction means includes:
2. The information recording processing device according to claim 1, wherein the configuration data of the recording frame corresponding to the additional data is configured to control whether the parity of the data is an even number or an odd number by setting a bit value of the DC control bit. . The information recording processing apparatus includes:
The information recording processing apparatus according to claim 1, wherein the additional data corresponding data is configured to be selected from configuration data of user control data (UCD). The information recording processing apparatus includes:
The additional data is
2. The configuration set as configuration information of at least one of content encryption key information, encryption key generation information, content reproduction control information, and content copy control information stored in the information recording medium. The information recording processing apparatus described in 1. The modulation data generation means includes
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 means includes
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 demodulator that performs demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics A decoding unit;
An information reproduction processing apparatus comprising: The data characteristics of the additional data-compatible data and the data characteristics of the additional data-compatible recording frame are characteristics of whether the parity of each component data is even or odd,
The additional data decoding unit
Whether the parity of the additional data corresponding data is even or odd,
Whether the parity of the configuration data of the recording frame corresponding to the additional data is even or odd,
9. The information reproduction processing apparatus according to claim 8, wherein the information reproduction processing apparatus is configured to execute an acquisition process of additional data configuration bit information based on the two data characteristic determinations.   9. The information reproduction processing apparatus according to claim 8, wherein, in the additional data decoding unit, the additional data corresponding data unit whose data characteristics are to be discriminated is user control data (UCD: User Control Data). The information reproduction processing device includes:
Processing for generating at least one of content encryption key information, encryption key generation information, content reproduction control information, and content copy control information stored in the information recording medium based on the acquired additional data configuration bit information The information reproduction processing apparatus according to claim 8, wherein the information reproduction processing apparatus is configured to execute. An information recording medium,
Stores modulation data based on multiple recording frames,
An information recording medium having a configuration storing modulation data based on a recording frame in which a DC control bit is adjusted based on a configuration bit value of additional data and data characteristics of specific additional data corresponding data. The data characteristic of the additional data corresponding data is a characteristic of whether the parity of the configuration data is even or odd,
The information recording medium is
A configuration in which modulation data based on a recording frame in which a DC control bit is adjusted based on two conditions, that is, a configuration bit value of additional data and a parity of the configuration data of the additional data corresponding data is even or odd is stored The information recording medium according to claim 12, further comprising: A recording frame in which the DC control bit recorded on the information recording medium is adjusted,
Configuration bit value of additional data,
Whether the parity of the configuration data of the additional data corresponding data is even or odd,
Based on the above two conditions, the recording frame is a recording frame that determines whether the parity of the constituent data of the recording frame is an even number or an odd number, and has a DC control bit adjusted according to the determination information. The information recording medium according to claim 12. 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, and content copy control information of stored content in the information recording medium. The information recording medium according to claim 12. The information recording medium is
13. The information recording medium according to claim 12, wherein data is recorded based on a modulation recording frame generated by executing a data conversion process that satisfies RLL (1, 7) as a run length rule. . The information recording medium is
13. The information recording medium according to claim 12, wherein data is recorded based on a modulated recording frame generated by executing processing for converting 2-bit information into 3-bit information. Information recording processing method,
A DC control bit determining step for determining a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
A modulation data generation step of generating a recording frame corresponding to additional data in which the DC control bit determined in the DC control bit determination step is set, and performing a data modulation process to generate a modulation recording frame;
An information recording processing method characterized by comprising: The DC control bit determination step includes:
Whether the configuration bit value of the additional data is 0 or 1, and
Whether the parity of the additional data corresponding data is even or odd,
19. The information recording processing method according to claim 18, wherein the information recording processing method is a step of executing a process of determining a bit value of a DC control bit set in the recording frame corresponding to the additional data based on the two conditions. The DC control bit determination step includes:
19. The information recording processing method according to claim 18, further comprising a step of controlling whether the parity of the configuration data of the recording frame corresponding to the additional data is an even number or an odd number by setting a bit value of the DC control bit. . The information recording processing method further includes:
19. The information recording processing method according to claim 18, further comprising a step of selecting the additional data corresponding data from configuration data of user control data (UCD: User Control Data). In the information recording processing method,
The additional data is configuration information of at least one of content encryption key information, encryption key generation information, content reproduction control information, and content copy control information stored in the information recording medium. 18. The information recording processing method according to 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 demodulation step for performing demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics Decoding step;
An information reproduction processing method characterized by comprising: The additional data decoding step includes:
Whether the parity of the additional data corresponding data is even or odd,
Whether the parity of the configuration data of the recording frame corresponding to the additional data is even or odd,
26. The information reproduction processing method according to claim 25, wherein an additional data component bit information acquisition process is executed based on the two data characteristic determinations. The additional data decoding step includes:
26. The information reproduction processing method according to claim 25, wherein the configuration data of the user control data (UCD) is decoded as the additional data corresponding data part whose data characteristics are to be determined. The information reproduction processing method further includes:
Processing for generating at least one of content encryption key information, encryption key generation information, content reproduction control information, and content copy control information stored in the information recording medium based on the acquired additional data configuration bit information 26. The information reproduction processing method according to claim 25, further comprising a step of executing. A computer program for executing information recording processing;
A DC control bit determining step for determining a DC control bit to be set in the additional data-corresponding recording frame based on the constituent bit value of the additional data and the data characteristics of the additional data-corresponding data;
A modulation data generation step of generating a recording frame corresponding to additional data in which the DC control bit determined in the DC control bit determination step is set, and performing a data modulation process to generate a modulation recording frame;
A computer program characterized by comprising: A computer program for executing reproduction processing of information stored in an information recording medium;
A demodulation step for performing demodulation processing of data read from the information recording medium;
Additional data corresponding to the additional data corresponding data read from the information recording medium and the data characteristics of the additional data compatible recording frame, and the additional data constituting bit information acquisition processing based on the determined two data characteristics Decoding step;
A computer program characterized by comprising:

Images