JP2009016002A - Dubbing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interface which can be easily understood by a user in copy operation in a state that complicated copy information exists such as limitation on the number of copies. <P>SOLUTION: The interface shows information of distinction among available number of copies, selectable operations (copy and move, or move only), selectable recording media as copy destinations, move classes (move capability compatible with multi-copy, move capability not compatible to multi-copy, and move incapability), and so on, to the user, and allows the user to operate. <P>COPYRIGHT: (C)2009,JPO&INPIT

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. If 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 number of possible times is reduced. The number of times information is updated, and the digital information signal or the converted digital information, the copy control information, and the number of copies information are recorded again. The digital information signal or the converted digital information is made unreproducible while being recorded on the body ".

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 devices 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 copies of digital information whose copy control information is Copy Once Generation, and displaying the information on the number of copies that can be copied to the user. is doing.

  However, in the digital information recording / reproducing apparatus disclosed in Patent Document 1, as a digital information copy control method, it is assumed that digital data is recorded by separating whether copying is possible or copying is possible depending on the type of recording medium. There is no description up to the control method.

  Therefore, even when the copy control method is complicated so that copying is not possible and copying is possible depending on the number and type of recording media, the user-friendliness during the copying operation is improved.

  Specifically, for example, upon receiving a dubbing operation from the recording medium to the recording medium, the user can select the number of copies, selectable operations (copy and move, or move only), and a recording medium that can be selected as a copy destination. , While performing the operation while presenting information to the user such as the type of move depending on the recording medium (multiple copies can be moved, and multiple copies are not supported but can be moved or cannot be moved) It was set as the structure which can be made.

  According to the above means, for example, the convenience of the user in the dubbing operation can be improved.

Hereinafter, examples (examples) of the preferred embodiments of the present invention will be described. However, the present invention is not limited to this embodiment. For example, the present embodiment describes a recording apparatus, which is suitable for implementation in the recording apparatus, but does not hinder application to other than the recording apparatus. Moreover, it is not necessary to employ all the configurations of the embodiments, and can be selected.

<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 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. If “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 program content is stored, if digital_recording_control_data of the digital copy control descriptor is “10” and “one-generation copying 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, and 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 to a removable recording medium, digital_recording_control_data of the digital copy control descriptor is “10” and “one generation can be copied” in TV, data service digital recording, or audio service digital recording. 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".

<Receiving device>
FIG. 10 shows a configuration example of a recording apparatus 100 as an example of the recording 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 is superimposed on the image data uniquely prepared by the recording device 100 to display the display image. Is generated. 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. An operation unit 110 is provided with a button group for performing operations such as recording and reproduction, for example, and the user directly operates the buttons to control the recording apparatus 100. The remote control IF 108 and the operation unit 110 are collectively referred to as an operation unit or an operation input unit. Reference numeral 111 denotes a control unit that controls the operation of the recording 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.

  Reference numeral 114 denotes a slot (also referred to as an attaching / detaching portion) in which a removable recording medium can be attached. Reference numeral 115 denotes a detachable recording medium that performs recording in the same recording format as the recording medium 105. Reference numeral 116 denotes a switch, which selects which data of the recording medium 105 and the removable recording medium 115 is output to the recording / playback control unit 104 or which data is input. Although only one switch is shown in FIG. 10, it is conceivable to prepare different switches for input and output. Alternatively, a configuration in which a recording / reproduction control unit is prepared for each of the recording mediums 115 that can be attached to and detached from the recording medium 105 can be considered. In addition, although the slot 114 and the recording medium 115 are represented as a single unit in the drawing, there are a plurality of slots, and a configuration in which data is exchanged between the respective recording media is also conceivable.

  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.

  When storing digital data in the recording medium 105, the control unit 111 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 111 instructs to update copy control information of 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.

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. Further, digital data whose copy generation management information is “copiable” may include data that is encrypted and output protected, and data that is not encrypted and output protected.

  FIG. 12 shows an example of a preferable data configuration of the removable recording medium 115 (for example, a removable hard disk). Reference numeral 301 denotes a management area that cannot be accessed by the user. By storing the key data for encrypting the digital data and recording it in the data recording area 302 in the management area, confidentiality is maintained. A data recording area 302 allows the user to access internal data by a predetermined operation. 301 stores key data. In 302, information reproduction data for determining key information corresponding to each data in the data recording area is recorded together with data such as video / audio data and still image data. On such a removable recording medium 115, the copy control information can also be recorded in the management area at once.

  FIG. 13 shows another example of a preferable data structure of the recording medium of FIG. 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 301 in FIG. 12 corresponds to the tamper resistant area, and the data recording area 302 corresponds to the normal area.

  In the recording apparatus 100 shown in FIG. 10, the detachable recording medium 115 is different from the one shown in FIGS. 12 and 13, for example, the recording information that may be illegally tampered with management information and program information related to copy control. In the case of a medium or a recording medium incapable of copy control (a recording medium that is not certified by the standard or the like if it supports copy control), the input terminal 101 is connected to the recording medium 115 (non-secure recording medium). When recording the digital data input from, 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.

  FIG. 14 shows an example of copy control information 601 held in an area where information can be concealed when recording is performed on the recording medium 105 or the removable recording medium 115. Reference numeral 602 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 603 denotes the date and time when the program and copy control information were recorded. Reference numeral 604 denotes address information indicating where on the recording medium the corresponding data is recorded. Reference numeral 605 denotes copy generation management information of the corresponding digital data. Reference numeral 606 denotes information on the number of copies of the corresponding digital data.

  The content dubbing operation will be described with reference to FIGS. 15 and 16. Dubbing refers to both copying of content (content remains in the content copy source) and move (no content remains in the content copy source).

  In order to prevent the content from being copied to an unauthorized device that does not follow the copy control, authentication is performed between the recording medium and the recording device before performing dubbing. In order to perform authentication, for example, certificates (data in which device information and manufacturer information are registered) held in the management area of each recording medium or device are exchanged. This is called authentication processing. After performing the authentication process, it becomes possible to access the mutual management area. Information is exchanged with each other after it is proved by authentication that the devices are not unauthorized.

  FIG. 15 shows an example of copying content. In this example, program B having key data 0002 and copy control information 0002 is copied from recording medium A to recording medium B. The recording medium 115, management area 301, and data recording area 302 in the figure are the same as the contents shown in FIG. When copying content, after performing authentication processing between recording media, the content is first copied from the data recording area of the copy source (recording medium A) to the data recording area of the copy destination (recording medium B). . Thereafter, the key data and / or copy control information is copied from the copy source management area to the copy destination management area. As a result, the content (program B) can be played back at both the copy source and the copy destination.

  FIG. 16 shows an example of moving content. In this example, program B having key data 0002 and copy control information 0002 is moved from recording medium A to recording medium B. The difference between the move process and the copy process is that when the key data and / or copy control information is passed, after the key data is written to the move destination (recording medium B), the contents (programs) of the move source (recording medium A) are sequentially written. B) It is a point to delete copy control information and key data. In this case, the copy source content, the copy control information, and the key data are deleted. However, for example, an implementation in which only the key data is deleted may be used. In this way, during the move, management is performed so that the content cannot be played back simultaneously on both the move source and the move destination.

  In this embodiment, a case where the user performs a content dubbing operation will be described.

  When the user presses a button such as “recorded program list” on the remote controller in order to confirm the content currently recorded on the recording medium, a list of contents currently recorded on the recording medium as shown in FIG. 26 is displayed. A recorded program list 2601 to be displayed on the screen is displayed. Reference numeral 2602 denotes a list of recording media that can display a recording list, which can be switched. A part of content included in the recording medium selected in 2602 is displayed in 2603. From this state, the user performs a predetermined operation using the remote controller or the operation unit 110, selects a content to be dubbed from 2603, and activates a dubbing menu (for example, pressing the “dubbing” button or pressing the menu button to display the menu). The dubbing menu is activated by starting and selecting “Dubbing” from the menu.

  Although the remote control will be mainly described, it is not limited to the remote control. Further, when a screen is displayed in response to an operation, the operation input received by the remote control IF 108 or the operation unit 110 and the control unit 111 are analyzed and the display control unit 106 outputs the screen.

  FIG. 17 shows an example of the dubbing menu. Reference numeral 1701 denotes a display screen, and in this example, the copyable number information of content to be dubbed selected by the above operation is analyzed as X. Here, X is 1 or more. In the menu, a message example 1702 indicating the number of contents that can be copied and a dubbing type setting menu 1703 that allows the user to select whether to copy or move are displayed. In order to display the copyable number X, for example, the control unit 111 acquires (analyzes) the copyable number of the currently selected content from the recording / playback control unit 104, notifies the display control unit 106, and copies it. The possible number X is displayed. In addition, when the content is “Copy-free”, it is also possible to display that the X portion is displayed as “∞”, “unlimited”, “Free”, etc., and display that unlimited copy operations can be performed. It is done.

  When the “copy” button of the dubbing type setting menu 1703 is selected by the user operating the remote controller, for example, the copy destination selection menu 1704 is displayed. The copy destination selection menu displays, for example, a list 1705 of recording media 115 currently connected to the slot 114, and the user can select how many contents are to be copied to each device or recording medium. It is a menu. In this example, it is detected that the external HDD 1, the external HDD 2, the SD card, and the i.Link device are connected as recording media connected to the slot 114 through the slot 114, and the user's In this example, the control unit 111 is set to copy three contents to the external HDD 1 and one content to the SD card by the operation. After the user sets the number of contents to be copied to each recording medium using a remote controller or the like, the user selects a “decision” button on the final decision button 1705 on the menu to execute copying. . Even if there is no operation by a remote controller or the like, for example, an initial value may be automatically set according to the number of mounted recording media to allow the change. A method for copying one content to one recording medium is as described in FIG. 15, and a method for copying a plurality of contents to one recording medium will be described later.

  In this way, the user can easily set the number of copies to be made on a plurality of recording media while confirming the number of contents that can be copied. Further, in this example, there is shown an example in which a plurality of recording media exist, but even in the case of one, the same operation is possible.

  When the total number of copies set by the user on a plurality of recording media (hereinafter referred to as user-set copy number) is one larger than the number of copyable contents, a message such as 1801 in FIG. A notice is sent to the effect that the original content is deleted, and the user confirms the intention of “execute” or “cancel”. Copying up to the same number as the number of copies allowed is allowed, and if the number of copies exceeds the limit, a message indicating that copying is not possible may be displayed. This is because +1 dubbing is possible. This eliminates the need for the user to operate the number of copies that can be copied and the move. In addition to the message “If you copy up to the maximum copyable number +1, the original content will be deleted” as in 1801, the display message will be “Execute X copies and moves” You may message.

  If the user set copy number is 2 or more larger than the copyable number of contents, an error message 1802 indicating that copying is not possible is displayed as shown in FIG. 18B, prompting the user to input again. This is because even if the number of copies and the move can be combined, it cannot be executed.

  In the example of FIG. 17, the dubbing type setting menu 1703 and the copy destination selection menu 1704 are displayed on the same screen, but are configured on different screens as shown in FIGS. May be.

  FIG. 20 shows a display screen example when the user performs a “move” operation. When the “move” button of the dubbing type setting menu 1703 is selected by the user, a move destination selection menu 2001 is displayed. In the move destination selection menu 2001, for example, a list 1705 of the recording media 115 currently connected to the slot 114 is displayed, and the move types that each recording medium can handle (corresponding to a plurality of copies can be moved). , Which does not support multiple copies, but can be moved or cannot be moved (also referred to as a move condition). In this example, “◎” indicates that a plurality of copies can be moved, and “◯” indicates that a plurality of copies are not supported, but a move is possible, and “x” indicates that a move is not possible. Further, a symbol explanation 2002 is displayed on the screen so that the user can easily understand the meaning. Of course, the combination of symbols is not limited to this example, and other symbols may be used, and numbers, letters, etc. may be used.

As a method for determining which move type each recording medium corresponds to, a method of acquiring and analyzing information of each recording medium is conceivable. (For example, if a version corresponding to the copy control standard is acquired, and if it is newer than a certain version, DTCP authentication that supports multiple copies can be confirmed, so the move is OK, etc.)
When the user attempts to move from a recording medium that supports multiple copies to a recording medium that does not support multiple copies, a message 2102 in FIG. A warning is given that the information of the multiple copies will be erased. That is, it is a warning that even if the content is supposed to be copied for the remaining five, it cannot be copied (the number of copies that can be made is zero) after the move.

  With these displays, the user can perform a move operation while easily grasping the corresponding conditions of the recording medium at the move destination.

  When the content selected by the user is 0 copyable content or copy prohibited content, a screen as shown in FIG. 22 is displayed. In FIG. 22, there is no “copy” option in the dubbing type setting menu 1703, and only the move can be selected.

  The determination process will be described with reference to the process flow of FIG. First, when the content selected by the user is copy-prohibited (yes in S1) (specifically, when the copy generation information of the content is “No-more-copies”), the dubbing displayed on the screen Only “move” is displayed in the type setting menu 1703 (S4), and if the content selected by the user is not copy-prohibited (yes in S1) (specifically, the copy generation information of the content is “Copy”) -One-generation "," Copy-free ", etc.), the next determination S2 is executed. When the number of times that the target content can be copied is 0 (yes in S2), S4 is executed as described above, and only “move” is displayed in the dubbing type setting menu 1703 displayed on the screen. When the number of times the target content can be copied is not 0 (including “Copy-free”) (No in S2), the dubbing type setting menu 1703 displayed on the screen includes “Copy” and “Move” "Is displayed (S3). As a result, the user can easily determine a process that can be selected between the currently selected content copy and move.

  A process for simultaneously copying a plurality of contents to one recording medium will be described. Here, description will be made assuming that P contents are simultaneously copied to one device.

  FIG. 24 shows processing when the copy destination device is “a recording medium capable of managing the copy generation”. The configuration of the recording medium A and the recording medium B in the figure is the same as that of the recording medium 115 in FIG. When the copy destination device is a “recording medium that can manage copy generations”, after copying one content, one key data and copy control information are transferred. P-1) Control is performed so that the number of copies that can be copied is subtracted by P. As a specific control method, copy control information (information 0002) with the copyable number (P-1) from the beginning may be transferred, or copy control information (information 0002) can be copied to 0. After transferring as a piece, the operation of increasing the number of copies of the information 0002 on the recording medium B may be performed (P-1) times. Since these processes depend on the implementation of the security processing module, there is no problem even if either one is chosen. Thereafter, P copies are also subtracted from the copy source number. By processing in this way, the recording capacity of the recording medium to be used is reduced to 1 / th while maintaining the same number of times that the copied content can be copied compared to simply copying the content for P-1 times. (P-1) It becomes possible to reduce by a factor of two.

  FIG. 25 similarly shows processing when the copy destination device is “a recording medium that cannot manage copy generation”. If the copy destination device is a “recording medium that cannot manage copy generations”, simply copy it multiple times (P times) to create a format with P contents, key information, and copy control information. To do.

  In this way, it is determined whether the recording medium at the recording destination is “a recording medium that can manage the copy generation” or “a recording medium that cannot manage the copy generation”, and the processing is automatically switched.

  In addition, even if it is a "recording medium that can manage copy generations", if there are reasons such as ease of management, simplification of processing, or having multiple content entities, simply copy multiple times. The method to be performed may be implemented, and P pieces of content, key information, and copy control information may be held.

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 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 structural example of the information of the detachable recording medium. 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 management of the recorded copy control information. It is a schematic diagram of a recording medium when performing a copy operation. FIG. 6 is a schematic diagram of a recording medium when performing a move operation. It is an example of the dubbing menu of a recording device. It is an example of the warning message at the time of copy operation. It is a modification of the dubbing menu of a recording device. It is an example of a display at the time of move operation of the dubbing menu of a recording device. It is an example of the warning message at the time of a move operation. It is an example of the dubbing menu of a recording device. It is an example of the determination flow at the time of dubbing classification setting menu display. It is a schematic diagram of a plurality of content copies when a copy destination recording medium supports a plurality of copies. It is a schematic diagram of a plurality of content copies when a copy destination recording medium does not support a plurality of copies. It is an example of the video recording program list of a recording device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus 2 ... Relay apparatus 3 ... Reception apparatus 11 ... Source generation part 12 ... Encoding part 13 ... Scramble part 14 ... Modulation part 15 ... Transmission antenna 16 ... Management information provision part 10, 100, 1200 ... Recording apparatus 101, 109 , 201, 202, 207, 1201... Input terminals 102, 1201... Receiving unit 103 .. image / audio signal processing unit 104, 1203 .. recording / playback control unit 105. ... output terminal 108 ... remote control interface 110 ... operation unit 111 ... control unit 112 ... nonvolatile memory 113 ... system bus 203 ... copy control information processing unit 204 ... encryption unit 205 ... recording control unit 208 ... reproduction control unit 209 ... decryption unit 114 ... Slot 115 ... Removable recording medium 11 6, 1204 ... switch

Claims (8)

An analysis unit for analyzing the copyable number included in the copy control information corresponding to the digital data recorded on the recording medium;
A dubbing apparatus comprising: a setting unit that sets the number of copies when receiving an operation instruction for dubbing digital data recorded on a recording medium to a plurality of other recording media different from the recording medium. The dubbing apparatus according to claim 1,
The setting unit permits dubbing within the copyable number analyzed by the analysis unit. The dubbing apparatus according to claim 1,
The setting unit permits dubbing by the number obtained by adding 1 to the copyable number analyzed by the analysis unit. The dubbing apparatus according to claim 1,
When the setting unit receives a dubbing request in which 1 is added to the copyable number analyzed by the analyzing unit, the setting unit outputs an inquiry as to whether the digital data may be deleted from the dubbing source recording medium. The dubbing apparatus according to claim 1,
The setting unit prohibits dubbing by the number obtained by adding 2 to the copyable number analyzed by the analysis unit. The dubbing apparatus according to claim 1,
The setting unit sets the number of copies depending on whether or not the recording medium supports a plurality of copy controls. A copy control information reading unit for reading copy control information related to digital data from a recording medium;
A copy information analysis unit for analyzing the copy control information;
A dubbing type setting unit for setting whether the user performs copying or moving in the dubbing operation;
An executable dubbing type determination unit that determines a currently executable dubbing type among the dubbing operations;
A dubbing apparatus that determines an executable dubbing type based on the copy generation information and the number of copies that can be included in the copy control information, and notifies the user of the result. A move type determination unit that analyzes information and determines a corresponding move type of the recording medium;
A move condition display unit for displaying the move condition corresponding to the recording medium,
A dubbing device that displays a move condition supported by each recording medium to a user when a move operation is received.

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