JP4484902B2 - Recording device - Google Patents

Description

  The technical field relates to an apparatus for recording and / or reproducing digital information. In particular, the present invention relates to a copy control technique in the apparatus.

  Regarding the above technical field, Japanese Patent Application Laid-Open Publication No. 2004-228561 has an object of “providing an apparatus and method capable of restricting recording on a recording medium in a recording / reproducing apparatus of digital information to be copyright protected”. When the copy control information is (Copy One Generation), the recording / playback control circuit records the converted digital information obtained by converting the information to a predetermined bit rate together with the information and the copy number information on the recording medium. When the digital information or the converted digital information is moved to the recording medium of the recording apparatus connected to the reproducing apparatus while being (Copy No. More) according to the copy control information, the possible number of times is reduced. Copy number information is updated, and the digital information signal or the converted digital information, the copy control information, and the copy number information are recorded again. And records the body and configured to reproduction disabling said digital information signal or the converted digital information. "It has been described.

JP 2006-1114090 A

  In recent years, with the widespread use of digital broadcasting, various recording media have been distributed, and various forms of viewing digital content have become available. Under such circumstances, from the viewpoint of copyright protection, it is conceivable to control data transmission / reception among a plurality of recording / reproducing apparatuses or recording media by using copy control information. However, the control based on the copy control information makes it difficult to determine whether or not copying is possible between arbitrary devices, thus reducing the usability of the user. The digital information recording / reproducing method disclosed in Patent Document 1 improves the usability by managing the number of times that digital information whose copy control information is Copy Once Generation can be copied and displaying the information on the number of times the copy can be made to the user. is doing.

  However, in the digital information recording / reproducing apparatus disclosed in Patent Document 1, as a result of repeated recording and copying of digital information, a plurality of digital data having different copy control information and / or different number of times of copying is stored in a certain recording medium. It is not assumed until the case, and there is no description about the control method.

  In this case, for example, when there are a plurality of digital data with the same contents, the digital data that can still be copied is deleted, and only the digital data that cannot be copied any more remains. There is a risk of inconvenience such as end.

  Therefore, for example, a recording / reproducing unit for writing digital information including copy control information including copy generation management information and copyable number information and reading data on a recording medium, and copy generation management information for only one generation. In the case of information indicating that recording is permitted, the copyable number information is recorded together with the digital information on the recording medium, and when displaying the list of the digital information recorded on the recording medium, the information is classified and displayed by the copy control information. And a control unit.

  In addition, for example, a plurality of pieces of digital information having different copy generation management information and copyable number information and equivalent contents are stored in the first recording medium, and the digital information having a plurality of copyable numbers is stored in the first recording medium. When copying from a first recording medium to a second recording medium different from the first recording medium, the user is notified that digital information equivalent in content exists in the first recording medium.

  According to the above means, for example, digital information in which the contents of video / audio data contained in one recording medium are equivalent (for example, the program titles are the same) and copy control information and / or copyable number information is different can be managed. , Display, notification, etc., can improve usability.

  Hereinafter, examples (examples) of the preferred embodiments of the present invention will be described. However, the present invention is not limited to this embodiment. The present embodiment mainly relates to handling of information that is permitted to be copied by one generation.

<System>
FIG. 1 is a block diagram illustrating a configuration example of a system according to the present embodiment. The case where information is transmitted / received by broadcast and recorded / reproduced is illustrated. However, it is not limited to broadcasting but may be VOD by communication, and is also collectively referred to as distribution.

  1 is a transmitter installed in an information providing station such as a broadcast station, 2 is a relay device installed in a relay station or a broadcasting satellite, 3 is a receiver installed in a user's house, and 10 is a receiver 3 This is a reception recording / reproducing unit built in. The reception recording / reproducing unit 10 can record and reproduce the broadcast information.

  The transmission device 1 transmits the modulated signal radio wave via the relay device 2. For example, transmission by cable, transmission by telephone line, transmission by terrestrial broadcasting, etc. can be used. As will be described later, the signal radio wave received by the receiving device 3 is demodulated into an information signal, and then recorded as a signal suitable for recording as necessary. Further, the user can view the video and audio indicated by the information signal by connecting the receiving device 3 to a display (not shown) when the receiving device 3 has a built-in display, or connecting the receiving device 3 to a display (not shown). Can do.

<Transmitter>
FIG. 2 is a block diagram illustrating a configuration example of the transmission device 1 in the system of FIG.

  Reference numeral 11 denotes a source generation unit, 12 denotes an encoding unit that performs compression by the MPEG method, 13 denotes a scramble unit, 14 denotes a modulation unit, 15 denotes a transmission antenna, and 16 denotes a management information addition unit. Information such as video and audio generated by the source generation unit 11 including a camera and a recording / playback device is compressed by the encoding unit 12 so that it can be transmitted in a smaller occupied band. If necessary, the scrambler 13 performs transmission encryption so that a specific viewer can view. After modulation to be a signal suitable for transmission by the modulation unit 14, the signal is transmitted from the transmission antenna 15 to the relay device 2 as a radio wave. At this time, the management information adding unit 16 adds information such as copy control information and current time, which is information for controlling copying.

  In many cases, a plurality of pieces of information are multiplexed in one radio wave by a method such as time division or spread spectrum. Although not shown in FIG. 2 for simplicity, in this case, there are a plurality of systems of the source generation unit 11 and the encoding unit 12, and a multiplex for multiplexing a plurality of pieces of information between the encoding unit 12 and the scramble unit 13. Part (multiplexing part) is placed.

<Copy control information>
The copy control information is information for controlling restrictions such as whether or not copying is possible and the number of times, and is added by the management information adding unit 16, for example. Includes content usage descriptor and digital copy control descriptor.

  FIG. 8 shows an example of operation related to protection of program content by using copy control information.

  “Operation possible” indicates that the transmission side can select a generation restriction using digital copy control information for content corresponding to each service form. For example, “pay-per-view” indicates that any digital copy control information may be used. On the other hand, “pay-per-view pay broadcasting” indicates “copy prohibited” on the transmission side. Indicates that it cannot be selected.

  “Flat / Tier” refers to contracting a plurality of channels together for pay broadcasting or the like as a flat contract, and contracting for each channel as a tier contract.

  “Other than the above” includes, for example, “in the case of a program that is not a pay broadcast and does not involve content protection”.

  FIG. 3 shows an example of the structure of a content usage descriptor that is one piece of copy control information. The content usage descriptor is generated and added by, for example, the management information adding unit 16, and stored in PSI (Program Specific Information) (eg, PMT (Program Map Table)) or SI (Service Information) of MPEG-TS and transmitted. Information.

  The usage of the content usage descriptor is arranged (transmitted) when describing control information related to storage (recording) and output for the program. This means that if the 1-bit field of digital_recording_control_mode (digital copy mode bit) is “1”, even if the digital_recording_control_data of the digital copy control descriptor described in FIG. This indicates that recording is possible as "Copyable". In the case of “0”, it cannot be recorded as “Number Limited Copy Allowed”.

  The content usage descriptor is always arranged (sent) when the program is a target of output protection. This output protection means that protection is performed for the high-speed digital interface output of the content that can be copied without restriction using the output protection bit (encryption_mode) of the content usage descriptor. In other words, although it is encrypted when output via a digital interface or when copying to a recording medium, it does not limit the number of copies or generations. Retransmission to the Internet is virtually impossible. Also called “copy free with output protection” or EPN (encryption plus non-assertion).

  Further, it is always arranged (sent) when the digital copy control information of the program is “one-generation copy is permitted” and is not a target of “number-limited copy is permitted”.

  FIG. 4 shows an example of the description contents of each field of the content usage descriptor.

  In “descriptor_tag”, “0xDE” indicating a content use descriptor is described. In “descriptor_length”, the descriptor length of the content use descriptor is described. In “digital_recording_control_mode”, “0” is described when the digital copy control information is “one generation copy is permitted” and is not a target of “number limited copy is possible”. If the digital copy control information is “one-generation copy is permitted” and the target is “number-limited copy is permitted”, “1” is described.

  In “encryption_mode”, “0” is described when the digital copy control information is “copying possible without restriction” and the high-speed digital interface output is protected.

  “Retention_mode” means temporary storage control bit, and “0” is written to indicate that temporary storage is possible even if “digital_recording_control_data” (digital copy control information) in the digital copy control descriptor is “copy prohibited” To do. “Retention_state” means a temporary storage allowable time, and describes “111” indicating that storage for 1 hour 30 minutes is possible. Note that “image_constraint_token”, “retention_state”, and “encryption_mode” are “1” in the default state.

  Each field will be described later with reference to FIG.

  FIG. 5 shows an example of the structure of a digital copy control descriptor that is one piece of copy control information. The digital copy control descriptor is information that is generated and added by, for example, the management information adding unit 16 and stored and transmitted in MPEG-TS PSI (such as PMT) or SI.

  The digital copy control descriptor represents information for controlling the copy generation by a 2-bit field of “digital_recording_control_data” (digital copy control information).

  FIG. 6 shows an example of digital copy control information. When the digital copy control information is “00”, it indicates that copying is possible without restriction, when it is “01”, it indicates that it is defined by the broadcaster, and when it is “10”, it is one generation copy. “11” indicates that copying is prohibited. Note that “1st generation copying is possible” means that the received broadcast signal can be recorded (first generation copy), but the broadcast signal cannot be copied (copied) after recording.

  The content use descriptors in FIGS. 3 and 4 are also called copy number restriction information, and the digital copy control information in FIGS. 5 and 6 is also called copy generation restriction information.

  A detailed example of processing of the receiving apparatus 3 related to the copy control information described with reference to FIGS. 3 to 6 sent from the transmitting apparatus 1 will be described.

  FIG. 7 shows an example of processing for each field of the content usage descriptor in the receiving apparatus 3.

  If “descriptor_tag” is “0xDE”, it is determined that the descriptor is a content use descriptor. Based on “descriptor_length”, it is determined as the descriptor length of the content use descriptor. If “digital_recording_control_mode” is “1”, if the digital copy control information is “one-generation copy is permitted”, it is determined that the number of copies is permitted. If it is “0”, if the digital copy control information is “one-generation copy is permitted”, it is determined that the number of copies is not permitted. With regard to “image_constraint_token”, it is determined that the resolution of the video signal output is not limited no matter what value is entered. Regarding “retention_mode”, it is determined that temporary storage is possible regardless of any value. Regarding “retention_state”, it is determined that the temporary storage allowable time is 1 hour 30 minutes regardless of any value. When “encryption_mode” is “1”, it is determined that the high-speed digital interface output is not protected when the digital copy control information is “Copyable without constraint”. If it is “0”, if the digital copy control information is “copying possible without restriction”, it is determined that the high-speed digital interface output is protected.

  In addition, when a content utilization descriptor is not arrange | positioned (sent) for some reason, it is good to interpret each field as the following values. digital_recording_control_mode = '1', image_constraint_token = '1', retention_mode = '0', retention_state = '111', encryption_mode = '1'.

  FIG. 9 shows an example of control in which the receiving device 3 stores (records) program content using copy control information.

  For example, when the program content is stored, if digital_recording_control_data of the digital copy control descriptor is “10” and “one generation copy is possible”, the content shown in FIG. Accumulate as "copy prohibited". However, when digital_recording_control_mode is “1”, it is stored as “number limited copy allowed”. Even when accumulation is performed with “recopy prohibited”, the value of digital_recording_control_data in the digital copy control descriptor does not need to be changed.

  If digital_recording_control_data of the digital copy control descriptor is “10” and “one-generation copying is possible”, a plurality of copies must not be generated. However, storage in areas where the user cannot access for backup purposes is excluded. In addition, the above restriction is imposed on each broadcast reception unit. When there are a plurality of broadcast reception units, the above restriction is imposed on each broadcast reception unit.

  Regarding the number-limited copy permitted, N copies can be generated from the program content stored as “number-limited copy permitted”. The value of N may be based on a standard, for example. When a copy is generated via the high-speed digital interface output, the copy may be performed when the number of copies to be generated can be determined by using a move function or the like. For example, it can be recognized that the interface is IEEE 1394 and the output destination is a device compatible with the DTCP standard. The generated copy is set to “recopy prohibited” or an equivalent state.

  Also, when reproducing and outputting program content stored as “Number Limited Copy Allowed”, the high-speed digital interface performs output of No More Copies defined in DTCP (Digital Transmission Content Protection). . The analog video output and digital audio output can be output as “one generation copy permitted”.

  When the recording medium is a removable recording medium, there is another limitation in addition to FIG. For digital recording of program content on removable recording media, in the digital recording of TV, data service, or audio service, the digital copy control descriptor digital_recording_control_data is '10' and "one generation copy is possible" When receiving and recording content, even if it is the first generation of the received content, three or more copies are not allowed (for example, when receiving and recording a broadcast on three or more recording media at the same time). Is not recorded). This value (three or more examples) may be based on a standard, for example. In addition, a plurality of one-generation copies having the same recording format are not generated. However, digital recording to an area that the user cannot access for backup purposes is excluded. In addition, the restriction on recording on a digital recording medium is imposed on each broadcast reception unit. When there are a plurality of broadcast reception units, the above restriction is imposed on each broadcast reception unit. If the receiving device has a recording method that does not support digital_recording_control_mode, the program content whose copy_control_type in the digital copy control descriptor is '01' and digital_recording_control_data is '10' is affected by the value of digital_recording_control_mode in the content usage descriptor. First of all, digital recording is performed in the manner of "one generation copy is possible".

<Receiver (1)>
FIG. 10 shows a configuration example of a recording / reproducing apparatus 100 as an example of the recording / reproducing apparatus 10 in the receiving apparatus 3. A device having only one of the functions of recording and reproduction may be used.

  An input terminal 101 receives digital data such as radio waves from the relay device 2. A receiving unit 102 performs frequency conversion, modulation operation, error correction, and the like on the digital data received from the input terminal 101, and separates the multiplexed bit stream in one transponder into packets such as video and audio. A video / audio information processing unit 103 decodes video data and audio data. Reference numeral 104 denotes a recording / reproduction control unit that controls recording or reproduction on a recording medium. FIG. 11 shows an example of a more detailed internal configuration of this module. Reference numeral 105 denotes a recording medium for recording digital data such as a hard disk drive. A display control unit 106 generates output data from video / audio data and display data of various application interfaces (IF). For example, the video data processed by the video / audio processing unit 103 is scaled as necessary, and the video data, for example, an interface for operation or a still image such as a still image, which is uniquely prepared by the recording / reproducing apparatus 100 is displayed. Generate an image. An output terminal 107 transfers the generated data to a display device such as a display liquid crystal panel. A remote control IF 108 is used when the user performs an operation using the remote control. Reference numeral 109 denotes an input terminal, which is a light receiving unit that receives a signal from the remote controller. Reference numeral 110 denotes an operation unit for providing a group of buttons for performing operations such as recording and reproduction, and for controlling the recording / reproducing apparatus 100 when the user directly operates the buttons. Reference numeral 111 denotes a control unit that controls the operation of the recording / reproducing apparatus 100, and includes, for example, a CPU. Reference numeral 112 denotes a nonvolatile memory for recording information. A system bus 113 performs data communication between each block connected to the control unit 111.

  FIG. 11 shows a configuration example of the recording / playback control unit 104.

  An input / output terminal 201 is connected to the system bus 113 and transmits a control signal. Reference numeral 202 denotes an input terminal which inputs digital data including video data and audio data to be recorded on a recording medium. A copy control information processing unit 203 analyzes the copy control information included in the digital data and updates it as necessary. Reference numeral 204 denotes an encryption unit that encrypts input digital data using, for example, key information transmitted by the control unit 111. Reference numeral 205 denotes a recording control unit which issues a command for recording on a recording medium and performs processing such as transfer of digital data. Reference numeral 206 denotes an output terminal which is connected to a recording medium. Reference numeral 207 denotes an input terminal for inputting digital data to be reproduced from the recording medium. A reproduction control unit 208 issues a command to the recording medium and reproduces desired digital data. A decrypting unit 209 decrypts the read encrypted digital data by using, for example, key information transmitted from the control unit 111. An output terminal 210 outputs the decoded digital data. A system bus 211 is a system bus that performs data communication between the blocks connected to the control unit.

The copy control information processed by the copy control information processing unit 203 includes, for example, copy generation management information and copyable number information. The copy generation management information is, for example, a 2-bit signal as shown below. )
01 No copy after recording (No-more-copies)
10 Only one generation can be recorded (Copy-one-generation)
00 Copy-free
Such a designation is conceivable. The copyable number information is designated by an integer of 0 or more, and it is conceivable to designate how many copies can be made.

  When storing digital data in the recording medium 105, the control unit 112 performs control based on, for example, a digital copy control descriptor and a content use descriptor included in the digital data. The digital copy control descriptor includes, for example, a copy control type and digital recording control data, and the content use descriptor is represented by a signal including, for example, an encryption mode and a digital recording control mode. The control unit 112 instructs to update the copy control information of the digital data stored in the copy control information processing unit 203 according to the values of these descriptors, and instructs the encryption unit 204 to perform encryption / not encryption.

  FIG. 12 shows an example of a copy control information recording area 301 held on the recording medium 105. Reference numeral 302 denotes a program ID indicating one group of digital data. The unit of grouping is, for example, the range from the beginning to the end of the broadcasted program or the same copy control information in the same program. Reference numeral 303 denotes the date and time when the program and copy control information were recorded. Reference numeral 304 denotes address information indicating where on the recording medium 105 the corresponding data is recorded. Reference numeral 305 denotes copy generation management information of the corresponding digital data. Reference numeral 306 denotes information on the number of copies of the corresponding digital data.

For example, when outputting digital data once recorded on the recording medium 105 by connecting an output terminal to the recording / reproducing control unit 104 or preparing another set of recording / reproducing control unit and output terminal in this recording / reproducing apparatus, The control unit 111 updates the copy control information of the digital data to be copied as appropriate according to the copy control information included in the digital data and the output interface, and updates the copy control information of the data output to the copy control information processing unit 203 For example, the decryption unit 209 is instructed to perform decryption / not decryption. For example, the digital data whose copy generation management information is No-more-copies and whose copyable number information is 8 is copied to another recording medium. The copy generation management information of the original digital data is No-more-copies regardless of whether the copy was successful. To update the number information to 7. Rewriting digital data copy control information to be copied to a different recording medium depends on the output interface. For example, if outputting to a removable recording medium such as a Blu-ray disc, a semiconductor memory, a magnetic disc, an optical disc, or a magneto-optical disc that can be accessed at random, output as No-more-copies. The copy generation management information is output as No-more-copies. For example, if the output is analog video, the copy generation management information is set to Copy-one-generation.

  In the recording / reproducing apparatus 100 having the above configuration, it is considered that no-more-copies digital data is moved to the recording / reproducing apparatus 100 from another recording / reproducing apparatus or another recording medium corresponding to the digital data move. . At this time, in the recording / reproducing apparatus 100, digital data whose copy control information is Copy-one-generation and digital data whose copy control information is No-more-copies and whose contents are equivalent may be stored in the recording medium 105. In this case, the user of the recording / reproducing apparatus 100 is confused because the copy control information cannot be distinguished at first glance.

  Note that a program with equivalent content is, for example, a program broadcast on the same date and time recorded by different devices, or a broadcasted program and a rebroadcasted program. Whether or not it is an equivalent program is determined, for example, by using the program title, program number, channel, broadcast date and time, broadcast area, etc. as program identification information. The program length (time), the analysis result of the contents of the program (video / audio data), and the like may be added to the determination factors as to whether they are equivalent. The fact that the contents are equivalent in this way is also expressed as overlapping contents of the program. The detection does not require that these pieces of information completely match in order to determine whether they are equivalent, but is equivalent (isn't it) because at least a part (for example, title) matches? Judgment should be made.

  In view of the above problems, FIG. 13 shows an example in which a list of digital data recorded in a recording medium is classified and displayed for each copy control information.

  In FIG. 13A, reference numeral 401 denotes a display screen. In 402, the name of a recording medium on which a list of recorded data is to be displayed is displayed. In 403, for example, the classification of digital data such as a folder name is displayed. In 404, a list of data corresponding to the classification designated in 403 among the digital data recorded in the recording medium designated in 402 is displayed. For example, when the user selects “all” in the category 403 by a predetermined operation, the data recorded on the recording medium is sequentially displayed in 404, and when “folder 1” is designated, the user previously stores the data in the folder. Only the classified data is displayed in 404.

  In FIG. 13B, in 405, instead of displaying the classification based on the folder name in 403, the classification based on the copy generation management information is displayed. At this time, 404 displays a list of data corresponding to the copy generation management information specified in 405. For example, when the user selects “copy free” in the category 405 by a predetermined operation, only the data whose copy generation management information is Copy-free is displayed in 404 and “copy once possible” (even if one copy generation is possible). If “Yes” is selected, data whose copy generation management information is Copy-one-generation is displayed in 404. At this time, the copy generation management information is No-more-copies and the number of copies that can be copied is a positive number is displayed with the classification of “Copy once possible”, or the copy generation management information is Copy-one-generation and the copy Data for which the possible number is 0 may be displayed with a classification of “copy prohibited”. When displaying, the information on the number of copies of each data may be displayed together with the data name.

  When the user performs a predetermined operation using the remote controller or a predetermined operation using the operation unit 110, the control unit 111 displays the display using the folder structure classification shown in FIG. 13A and FIG. 13B. The display using the classification for each copy control information is switched.

  By displaying digital data when multiple pieces of copy control information are mixed as described above, it is possible to easily grasp the digital data corresponding to the copy control information and improve the usability of the user. .

  Similar effects can be obtained by the process of determining whether or not copying is possible as analog data in the above embodiment. For example, for the classification of the copy control information shown in FIG. 13B, classifications “Analog copy possible” and “Analog copy impossible” are provided in 405, and programs corresponding to each status are displayed in a list in the area 304. Alternatively, the classification display may be switched by a predetermined operation by the user, and the list display may be specialized only for copy control information related to analog copying.

  Consider a case where data is copied when there is digital data with the same content and different copy control information on the recording medium 105.

  FIG. 14 is a flowchart illustrating an example of an operation of copying data whose copy generation management information is Copy-one-generation. The subject of the processing in the flowchart is basically the control unit 111.

  When the user selects data to be copied, in S501, the control unit 111 acquires copy control information of the selected data, and proceeds to S502. In step S502, whether or not copying is possible is determined based on the number of pieces that can be copied. If the copyable number information is 0, the process proceeds to S503, and if it is not 0, the process proceeds to S504. In step S503, a message indicating that copying cannot be performed is displayed, and the process ends. In step S504, the control unit 111 searches for data having content equivalent to the data designated to be copied. Information used for the search includes, for example, a program name and a recording time. In S505, if there is a program with equivalent contents as a result of the search, the process proceeds to S507, and if there is no program, the process proceeds to S506. In S506, the designated data is copied by a predetermined method, and the process is terminated. In S507, the copy generation management information and the copyable number information of the retrieved data are acquired, and the process proceeds to S508. In S508, it is determined whether the copy generation management information is No-more-copies. If so, the process proceeds to S511, and if not, the process proceeds to S509. In step S509, it is checked whether the copy generation management information of the retrieved data is Copy-one-generation and whether the copyable number information is less than the data specified by the user. If there are few, it will progress to S511, and if there are many, it will progress to S510. In S510, the data designated by the user is copied as in S506, and the process is terminated. In step S511, the user is notified that there is digital data having different copy control information, and the process ends. At this time, the corresponding data may be automatically copied and moved, and the data designated by the user may be stored in the recording medium 105 as it is. If there is a plurality of corresponding data as a result of the search in S505, the processing from S507 to S509 may be looped until it reaches S511.

  FIG. 15 is a schematic diagram showing an example of the message displayed in S511. Reference numeral 501 denotes a display screen. Reference numeral 502 denotes a message to be displayed. Reference numeral 503 denotes a button for confirming that the user has accepted the message. For example, the button 503 returns to the original application by performing a predetermined operation such as pressing a determination key on the remote controller.

  When there is digital data with equivalent contents and different copy control information by the above control, the user notices the presence of the different data when displaying a message in S511, and can perform a desired operation.

  Even if the data specified by the user is, for example, information where the copy generation management information is No-more-copies and the copyable number information is a positive number, the copy control information is different and the content is equivalent. Search and the same effect can be obtained.

  Next, consider a case where data is deleted when there is digital data with the same contents and different copy control information on the recording medium 105. When the user deletes one piece of data whose copy generation management information is Copy-one-generation, it is checked in the same sequence as S505 to S509 whether there is data with the same content but different copy information.

  FIG. 16 shows that, as a result, when there is digital data with the same data content and different copy control information, there is data with the same content and different copy information, and the usable range is narrower (for example, copy generation management information). An example of a message prompting the user to delete data (such as “No-more-copies” or a small number of copies) is shown. Reference numeral 701 denotes a display screen. Reference numeral 702 denotes a message to be displayed. Reference numerals 703 and 704 denote buttons for the user to specify a desired operation. If 703 is selected, the data specified by the user is deleted, and if 704 is selected, the data specified by the user is not deleted. After selecting 704, the user can separately delete data with different copy control information. With the above control, when there is digital data with the same content and different copy control information in one recording medium, it is possible to improve the user's convenience by not deleting the data with a large number of copies by mistake. It is. Further, in a recording / reproducing apparatus having a function of automatically deleting recorded data, it is possible to further improve usability by preferentially deleting contents with a small number of copies that can be copied.

  Next, a method for improving usability when the recording / reproducing apparatus 100 is used by a plurality of people will be considered.

  FIG. 17 is a flowchart illustrating an example of an operation in which a user of the recording / playback apparatus 100 reserves a copy process.

  Assume that a user wants to copy certain data whose copyable number information is a positive number. In S801, the user selects a program to be copied. In step S802, a name that allows the user to identify the user is registered by an arbitrary method, and the process advances to step S803. Examples of the registration method include input using a soft keyboard by remote control operation and character input by connecting a keyboard to a recording / playback apparatus. In step S803, the user sets the number of times the copy is scheduled by an arbitrary method, and the process advances to step S804. In step S804, it is determined whether the number set in step S803 is valid. That is, it is checked whether or not the total number of copies that can be copied and the number reserved so far is exceeded. If not, the process proceeds to S805, and if it exceeds, the process proceeds to S806. In S805, the fact that the reservation is possible, the input name (reserver name, number may be used in addition to the name) and the number of times are displayed on the screen, and the process proceeds to S807. In S806, since it is impossible to set the number of times input in S804, a message notifying this is displayed, and the process proceeds to S803 to prompt the user to set the number of times again. In S807, the user confirms the reservation setting by looking at the confirmation screen displayed in S805. If accepted, the process proceeds to S808, and if canceled, the control unit 111 discards the series of input data and ends the process. In step S808, the control unit 1111 records the copy reservation information on the recording medium 105 according to the determined format.

  FIG. 18 is a schematic diagram showing an example of the message displayed in S806. Reference numeral 901 denotes a display screen. Reference numeral 902 shows an example of a message. Reference numeral 903 denotes a button selected by the user.

  Even if the copy reservation information is recorded on the nonvolatile recording medium 113, the same effect as in the present embodiment can be obtained.

  FIG. 19 is a flowchart showing an example of copy control using the copy reservation information set as described above.

  It is assumed that the recording / reproducing apparatus 100 has a method by which the current user name can be recognized by some method. In S1001, the user designates a program to be copied. Assume that copy reservation information is attached to the designated program by the above-described sequence. In S1002, the control unit 112 obtains copy control information and copy reservation information for the designated program, and proceeds to S1003. In S1003, if the copy reservation information includes copy reservation information by the current user, the process proceeds to S1004, and if not, the process proceeds to S1006. In S1004, the designated program is copied and the process proceeds to S1005. In step S1005, the copyable number of the copied program is reduced by 1, and the copy reservation number of the user is reduced by 1, and the process is terminated. At this time, it may be determined whether the copy has been completed normally, and a message to be notified may be displayed. In step S1006, it is determined whether there is copy reservation information by another user and it is less than the number of copies that can be made. If it is less, the process proceeds to S1007, and if it is 0, the process proceeds to S1009. In step S1007, the designated program is copied in the same manner as in step S1005, and the process advances to step S1008. In step S1008, the number of copies that can be copied is reduced by 1 (subtracted), and the process ends. At this time, a message notifying whether copying has been completed may be displayed. In step S1009, a message indicating that there is a reservation and copying cannot be performed is displayed, and the process ends. At this time, it may be displayed which user has reserved how many copies based on the copy reservation information.

  By the above control, data that the user wants to copy later is inadvertently copied by another user, so that it is possible to prevent the copyable number information from becoming 0 and the copy cannot be executed, thereby improving the usability. It is.

  Alternatively, when the recording / reproducing apparatus 100 does not have a means for recognizing the current user, a method of displaying copy reservation information instead of the procedure of S1006 and entrusting the user at that time to determine whether or not to perform copying. Is also possible.

  Next, consider a case where the recording / reproducing apparatus 100 performs irreversible editing such as dividing the digital data recorded on the recording medium 105. When the copyable number information of the digital data that the user wants to edit is a positive number, the corresponding digital data is copied inside the recording medium 105, the data whose copy generation management information is No-more-copies is copied, Edit the duplicated data. As a result, even if editing fails, or even if the editing result is not satisfactory but cannot be restored, editing can be performed again as long as the original copyable number information remains a positive number. Can be improved.

  Next, let us consider a function of automatically recording based on copy control information in the recording / reproducing apparatus 100. When receiving a broadcast wave, the recording / reproducing apparatus 100 also receives digital data (also referred to as program guide information such as EPG data) describing a future broadcast schedule in order to display an electronic program guide. Therefore, when digital data with a reduced number of copies that can be copied is stored in the recording medium 105, it is automatically detected when it is detected that data equivalent to the content of the corresponding digital data is transmitted from a future broadcast schedule. Schedule recording. If the recording is successful, the previously stored digital data is discarded. The determination that the number has decreased is arbitrary. For example, the determination is made on the condition that the copyable number information is less than three times. These processes may be executed by the control unit 111. In particular, a part detected from the broadcast schedule is also referred to as a broadcast schedule analysis unit.

  According to the above embodiment, the number of copies that can be copied for the content of the same program content is increased from the viewpoint of the user (not actually increased, but the number of copies that can be made is reset to the default by re-recording the same program). It is possible to improve.

<Receiver (2)>
FIG. 20 is a block diagram illustrating a configuration example of the recording / reproducing apparatus 1100.

  Reference numeral 1101 denotes a slot (also referred to as an attaching / detaching unit) in which an attachable / detachable recording medium can be attached. Reference numeral 1102 denotes a detachable recording medium that performs recording in the same recording format as the recording medium 105. Reference numeral 1103 denotes a switch, which selects which data of the recording medium 105 and the removable recording medium 1102 is output to the recording / playback control unit 104 or which data is input. Although only one switch is shown in FIG. 20, it is conceivable to prepare different switches for input and output. Alternatively, a configuration in which a recording / playback control unit is prepared for each of the recording media 1102 and the detachable recording media 1102 can be considered.

  FIG. 21 shows an example of a preferable data configuration of a removable recording medium 1102 (for example, a removable hard disk). Reference numeral 1201 denotes a management area that cannot be accessed by the user. The key data for encrypting the digital data and recording it in the data recording area 1202 is stored in the management area to maintain confidentiality. A data recording area 1202 allows the user to access internal data by a predetermined operation. In 1201, key data is recorded. 1202 records information reproduction data for discriminating key information corresponding to each data in the data recording area together with data such as video / audio data and still image data. In such a removable recording medium 1102, the copy control information can be recorded in the management area in a lump.

  FIG. 24 shows an example of a preferable data structure of the recording medium of FIG. 21 in another expression. This recording medium is a recording medium (also referred to as a security removable medium) capable of copy control. In this copy control, management of a plurality of copies (also called copy number management, copy number control, number control copy) and / or copy generation management (copy generation management, copy generation control, generation control copy is also called. )including. One recording medium has both a normal area accessible to the user and a tamper-resistant area not accessible to the user. Confidential information stored in the tamper-resistant area can be accessed when authentication is confirmed by an authentication process with a device that can handle this recording medium, so that confidential information can be managed. It has become. The management area 1201 in FIG. 21 corresponds to the tamper resistant area, and the data recording area 1202 corresponds to the normal area.

  In the recording / reproducing apparatus 1100 shown in FIG. 20, the detachable recording medium 1102 is different from those shown in FIGS. 21 and 24. For example, the management information and program information shown in FIG. Recording medium 1102 (non-secure recording medium), or a recording medium incapable of copy control (a recording medium that is not certified by the standard as being compatible with copy control). When recording the digital data input from the input terminal 101, the control unit 111 causes the copy control information processing unit 203 to record the copy generation management information as No-more-copies and the copyable number information as 0.

  When copying or moving the digital data recorded on the recording medium 105 to this non-secure recording medium (recording medium 1102), the following control is performed. For example, when digital data whose copyable number information (copy permitted number information) recorded on the recording medium 105 is a positive number is recorded on the removable recording medium 1102, it is decoded by the decoding unit 209 of the recording / playback control unit 104. For example, the copy control information processing unit 203 keeps the copy generation management information No-more-copies, sets the copyable number information to 0, encrypts it with the encryption unit 204, and outputs it to the removable recording medium 1102. Key data is generated by the encryption unit 204 by passing information necessary for the control unit 111 to generate a random key to the encryption unit 204, and the recording control unit 205 uses a command for writing to the management area. Recorded in the management area 1201. In the case of copying, the copyable number information of the digital data recorded on the recording medium 105 is updated by one. When the number of copies that can be made is 0, copying is not allowed. In the case of a move, the digital data recorded on the recording medium 105 is deleted. As a result, it is possible to protect the copyright of a recording medium that cannot be used for copy generation management.

  On the other hand, the removable recording medium 1102 has the data structure shown in FIGS. 20 and 24, for example, so that the copy control information is recorded and managed in a management area that cannot be accessed by the user, thereby managing information shown in FIG. Is a recording medium that is less likely to be tampered with and / or is a recording medium that supports copy control (for example, a recording medium that is certified by the standard), this recording medium (secure recording medium) Copy control (including copy generation management) can be performed in the same manner as the recording medium 105 built in the recording / reproducing apparatus 1100.

  For example, when moving digital data broadcast to a secure recording medium (recording medium 1102), changed to No-more-copies and recorded on the recording medium 105 by copy-one-generation, the recording / playback control unit 104 The copy generation management information remains No-more-copies, and the copyable number information (copy permitted number information) remains a positive number without change. By adopting such a configuration and control, it is possible to provide user-friendliness close to a built-in recording medium while protecting digital data recorded on a removable recording medium 1102.

  Also, for example, when copying digital data recorded on the recording medium 105 to a secure recording medium (recording medium 1102), the recording / playback control unit 104 can copy the copy generation management information with No-more-copies. Normally, the number information (copy permitted number information) is recorded as 0. However, the number information that can be copied is reduced as compared with the non-secure recording medium, but it may be recorded as a positive number instead of 0.

  In the recording / reproducing apparatus 1100, the slot 1101 can be loaded with either a secure recording medium or a non-secure recording medium. In this case, for example, the control unit 111 confirms whether the management area 1201 exists, whether authentication according to the standard or the like can be performed with the recording medium, and the like. Whether the recording medium is a secure recording medium or a non-secure recording medium is identified. Based on this identification, control of copy generation management information and copyable number information is separately recorded during recording. Thus, even when the user owns both the secure recording medium and the non-secure recording medium, both copyright protection and usability can be achieved according to the recording medium.

  For example, FIG. 22 is an example of a screen showing a list of data recorded on the removable recording medium 1102 in the recording / reproducing apparatus 1100. In FIG. 22A, reference numeral 1301 denotes a display screen. Reference numeral 1302 denotes a tab for selecting recording data display of the recording medium 105. Reference numeral 1303 denotes a tab for selecting recording data display of the detachable recording medium 1102. The user switches exclusively with the tab 1302 by a predetermined operation. Reference numeral 1304 displays a classification of digital data such as a folder name. In 1305, a list of data corresponding to the classification designated in 1304 among the digital data recorded on the recording medium designated in either 1302 or 1303 is displayed. For example, when the user selects “all” in the classification 1304 by a predetermined operation, the data recorded on the recording medium is sequentially displayed in 1305, and when “folder 1” is designated, the user previously stores the data in the folder. Display only the classified data. In FIG. 22B, in 1306, instead of displaying the classification based on the folder name in 1304, the classification based on the copy generation management information is displayed. At this time, 1305 displays a list of data corresponding to the copy generation management information specified in 1306. For example, when the user selects “copy free” in the classification of 1306 by a predetermined operation, only data whose copy generation management information is Copy-free is displayed in 1305 and “copy once possible” (even if one copy generation is possible). If “OK” is selected, data whose copy generation management information is Copy-one-generation is displayed in 1305. At this time, the copy generation management information is No-more-copies and the number of copies that can be copied is a positive number is displayed in the classification of “Copy once possible”, or the copy generation management information is Copy-one-generation and the copy Data for which the possible number is 0 may be displayed with a classification of “copy prohibited”. When displaying, the information on the number of copies of each data may be displayed together with the data name.

  When the user performs a predetermined operation using the remote controller or a predetermined operation using the operation unit 110, the control unit 111 displays the display using the folder structure classification shown in FIG. 22 (a) and FIG. 22 (b). The display using the classification for each copy control information is switched.

  By displaying digital data when a plurality of copy control information is mixed even on a removable recording medium by the above processing, the digital data corresponding to the copy control information can be easily grasped, and the user can It is possible to improve the usability.

  In FIG. 22, the secure recording medium and the non-secure recording medium are not particularly distinguished, but they may be displayed separately. For example, a tab of a secure recording medium or a non-secure recording medium may be provided in the same row as the tab 1302 or in an upper or lower tab. Alternatively, the distinction between a secure recording medium and a non-secure recording medium may be shown in association with the title of digital data. In addition, a folder, a directory, and a tab may be shown for each recording medium to indicate whether the recording medium is a secure recording medium or a non-secure recording medium.

  Further, the list displayed in 1305 may be a thumbnail display as indicated by 403 in FIG.

<Receiver (3)>
FIG. 23 is a block diagram illustrating a configuration example of the recording / reproducing apparatus 1400. Reference numeral 1402 denotes a digital interface that encrypts and outputs digital data. Reference numeral 1403 denotes an output terminal which is connected to, for example, a different recording / reproducing apparatus or network. Reference numeral 1401 denotes a control detection unit which detects digital data copy control information.

  When outputting from these interface 1402 and output terminal 1403, control is performed in the same manner as described for copying or moving to a removable recording medium in FIG.

  For example, consider a case where digital data whose copy generation management information recorded on the recording medium 105 is Copy-one-generation is moved via the interface 1402 and the output terminal 1403.

  For example, in a move to a secure recording medium, the copy control information status is output as copy-one-generation, and the copyable number is output as a positive number. On the other hand, when moving to a non-secure recording medium, the copy control information status is output as No-more-copies (if the copy generation control is supported, Copy-one-generation is acceptable), and the number of copies that can be copied is 0. .

  Further, in this configuration, digital data can be output from the output terminal 1403 and streamed and reproduced by an external display device or recording device. In that case, the control unit 111 controls the control detection unit 1401 to output the copy control information at the time of output as No-more-copies.

  According to the above embodiment, it is possible to flexibly cope with copyright protection by appropriately using and outputting copy control information depending on the output method from the recording / reproducing apparatus 1400.

It is a block diagram which shows the structural example of a system. 3 is a block diagram illustrating a configuration example of a transmission device 1. FIG. It is an example of the structure of the content use descriptor which is one of copy control information. This is a description example for each field of the content usage descriptor. It is an example of the structure of the digital copy control descriptor which is one of copy control information. It is an example of the information which controls a copy generation. It is an example of the reception process in the receiver 3 of each field of the content use descriptor sent from the transmitter 1. This is an operation example of protection of program content by using the copy control information by the transmission apparatus 1. This is an example of control when the receiving device 3 stores (records) program content using copy control information. 2 is a block diagram illustrating a configuration example of a recording / reproducing apparatus 10. FIG. 3 is a block diagram illustrating a configuration example of a recording / playback control unit 104. FIG. It is a schematic diagram which shows the example of a table which manages copy control information. It is a schematic diagram which shows an example of a display screen. 10 is a flowchart illustrating a processing example of copy control. It is a schematic diagram which shows an example of a message display. It is a schematic diagram which shows an example of a message display. It is a flowchart which shows the processing example of copy reservation information recording. It is a schematic diagram which shows an example of a message display. 10 is a flowchart illustrating a processing example of copy control. 6 is a block diagram showing another configuration example of the recording / reproducing apparatus 10. FIG. It is a schematic diagram which shows the structural example of the information of the detachable recording medium. It is a schematic diagram which shows an example of a display screen. 6 is a block diagram showing another configuration example of the recording / reproducing apparatus 10. FIG. It is another schematic diagram which shows the structural example of the information of the detachable recording medium.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,100,1100,1200,1300 ... Recording / reproducing apparatus 101,109,201,202,207 ... Input terminal 102 ... Receiving part 103 ... Image / audio signal processing part 104 ... Recording / reproducing control part 105 ... Recording medium 106 ... Display Unit 107, 206, 210, 1203, 1302 ... Output terminal 108 ... Remote control interface 110 ... Operation unit 111 ... Control unit 112 ... Non-volatile memory 113 ... System bus 203 ... Copy control information processing unit 204 ... Encryption unit 205 ... Recording control unit DESCRIPTION OF SYMBOLS 208 ... Playback control part 209 ... Decoding part 1101 ... Slot 1102 ... Removable recording medium 1103 ... Switch 1401 ... Control detection part 1402 ... Digital interface

Claims (2)

A recording unit for recording digital information including a descriptor relating to copy control on the first recording medium;
When the descriptor indicates that only one generation is allowed to be recorded, the digital information recorded on the first recording medium is recorded on the first recording medium along with the digital information and copy control information based on the descriptor. A control unit that displays the copy control information when displaying a list of
The control unit accumulates a plurality of pieces of digital information having different copy control information and equivalent contents in the first recording medium, and one digital information among the plurality of pieces of digital information is stored from the first recording medium. A recording apparatus that notifies a user that digital information having equivalent content exists when copying to a second recording medium different from the first recording medium. A recording unit for recording digital information including a descriptor relating to copy control on a recording medium;
When the descriptor indicates that only one generation is allowed to be recorded, copy control information based on the descriptor is recorded together with the digital information on the recording medium, and a list of the digital information recorded on the recording medium is displayed. And a control unit that causes the copy control information to be displayed.
The control unit, when accumulating a plurality of pieces of digital information having different copy control information and equivalent contents on the recording medium, when deleting one piece of digital information from the plurality of pieces of digital information, A recording apparatus that preferentially deletes digital information with a small number of copies that can be indicated by the information.

Images