JP2020005319A - Digital content reception device and digital content reception method - Google Patents

Abstract

To solve a problem that display of copy possible number information is not considered in a program list table.SOLUTION: A reception device comprises: reception means for receiving, for example, a program in a plurality of broadcast networks and data including program information about the program; program table creating means for creating a program table by using the program information about the program; and display control means for controlling display of the program table created by the program table creating means. The display control means controls so that information related to copy control according to the broadcast networks is displayed on the program table. According to this, copy possible number information can be displayed on the program table, and a user can select the program having a large copy possible number when performing program reservation.SELECTED DRAWING: Figure 14

Description

  The technical field relates to a program receiving device. In particular, the present invention relates to a technique of copy control in an apparatus.

  Regarding the above technical field, Patent Document 1 has an object to “provide an apparatus and a method capable of restricting recording of digital information to be copyright protected on a recording medium in a recording and reproducing apparatus.” When the copy control information is (Copy One Generation), the recording / reproduction control circuit records, together with the information, converted digital information obtained by converting the information to a predetermined bit rate and the copy number information on the recording medium. According to the copy control information, when the digital information or the converted digital information is moved to the recording medium of the recording device connected to the reproducing device while (Copy No More) is set, the possible number of times is reduced and the copy is performed. 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 times of copy information are again recorded on the recording medium. The digital information signal or the converted digital information is made unreproducible while being recorded on the body. "

  Patent Document 2 describes a method of providing a storage and recording device that achieves both user convenience and copyright holder rights protection for content of "one generation can be copied". A diagram is described in which copyright management information is described and displayed in a program information list to improve user convenience.

JP 2006-114090 A JP 2006-244603 A

  2. Description of the Related Art In recent years, with the spread of digital broadcasting, various recording media have been distributed, and the manner in which digital content is viewed has become diverse. Under such an environment, from the viewpoint of copyright protection, it is conceivable to control data transmission and reception between a plurality of recording / reproducing devices or recording media by using copy control information. However, the control based on the copy control information complicates the determination as to whether or not copying is possible between arbitrary devices, and reduces the usability of the user. In the digital information recording / reproducing method disclosed in Patent Literature 1, the copy control information manages the number of times that digital information can be copied, which is Copy Once Generation. are doing.

However, the digital information recording / reproducing apparatus disclosed in Patent Document 1 assumes only that copy control information of digital data recorded on a recording medium and / or the number of copies that can be made is displayed to the user. There is no description about the user display method in the reservation.
Further, the digital information recording / reproducing apparatus disclosed in Patent Document 2 assumes only copy generation management information as copy control information, and does not disclose means for displaying information on the number of copies that can be made to the user.

  In these cases, for example, when a plurality of digital data having the same content is broadcast, there is a possibility that inconveniences such as recording digital data that cannot be copied a plurality of times may occur.

  In order to solve the above problems, an embodiment of the present invention uses, for example, the technical idea described in the claims.

  According to the above means, for example, program reservation can be suitably performed.

FIG. 1 is a block diagram illustrating a configuration example of a system. FIG. 2 is a block diagram illustrating a configuration example of a transmission device 1. It is an example of the structure of the content use descriptor which is one of the copy control information. This is an example of description in each field of the content use descriptor. It is an example of the structure of the digital copy control descriptor which is one of the copy control information. It is an example of information for controlling the copy generation. 5 is an example of reception processing of each field of the content use descriptor transmitted from the transmission device 1 in the reception device 3. This is an operation example of protection of program content by the transmission device 1 using copy control information. This is an example of control in a case where the receiving device 3 accumulates (records) program content using copy control information. FIG. 2 is a block diagram illustrating a configuration example of a recording / reproducing device 10. FIG. 3 is a block diagram illustrating a configuration example of a recording / reproduction control unit 104. FIG. 4 is a schematic diagram illustrating a configuration example of information on a removable recording medium. FIG. 4 is a schematic diagram illustrating a configuration example of information on a removable recording medium. It is a schematic diagram which shows the example of a screen which displays a list of programs scheduled to be broadcast. It is a schematic diagram which shows the example of a screen which displays the detailed information of a program. It is a schematic diagram which shows the example of a screen which displays the setting of a program search. It is a schematic diagram which shows the example of a screen which displays the result of a program search in a list. It is a schematic diagram which shows the example of a screen which displays a list of programs scheduled to be broadcast. It is a schematic diagram which shows the example of a screen which displays the detailed information of a program. FIG. 14 is a schematic diagram illustrating an example of a screen that notifies a possibility that copy control information is changed. It is an example of a program content copy control table. FIG. 13 is a block diagram illustrating a configuration example of a system according to a third embodiment. FIG. 14 is a block diagram illustrating a configuration example of a recording / reproducing device 10 according to a fourth embodiment. FIG. 14 is a block diagram illustrating a configuration example of a recording / reproducing device 10 according to a fifth embodiment.

  Hereinafter, an example (example) of an embodiment suitable for 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 permitted to be copied for one generation.

This embodiment is an embodiment of the receiving apparatus of the present invention. The present embodiment will be described below with reference to the drawings separately for a system, a transmission device, copy control information, a reception device, a program guide, a screen display process of program details and a program search.
<System>
A system according to the present embodiment will be described with reference to FIG.
FIG. 1 is a block diagram illustrating a configuration example of a system according to the present embodiment. It illustrates a case in which information is transmitted / received by broadcasting and recorded / reproduced. However, the present invention is not limited to broadcasting, and may be VOD (Video On Demand) by communication, and is also collectively referred to as distribution.

  1 is a transmitting device installed in an information providing station such as a broadcasting station, 2 is a relay device installed in a relay station or a broadcasting satellite, etc., 3 is a receiving device installed in a user's home or the like, 10 is a receiving device 3 This is a receiving / recording / reproducing unit which is built in or externally attached to the device. The reception recording / reproduction unit 10 can record and reproduce the broadcast information.

The transmitting device 1 transmits a modulated signal radio wave via the relay device 2. For example, transmission by cable, transmission by telephone line, transmission by terrestrial broadcasting, and the like can be used. The signal radio wave received by the receiving device 3 is demodulated into an information signal and recorded as a signal suitable for recording as necessary, as described later. In addition, when the receiving device 3 has a built-in display, the user can connect the receiving device 3 to a display (not shown) to view the video and audio indicated by the information signal. Can be.
<Transmission device>
The transmitting device according to the present embodiment will be described with reference to FIG.
FIG. 2 is a block diagram showing 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 or the like, 13 denotes a scramble unit, 14 denotes a modulation unit, 15 denotes a transmission antenna, and 16 denotes a management information adding unit. Information such as video and audio generated by the source generation unit 11 including a camera and a recording / reproducing device is compressed by the encoding unit 12 so that the data amount can be transmitted with a smaller occupied band. If necessary, the data is transmitted and encrypted by the scrambler 13 so as to be viewable by a specific viewer. After being modulated so as to be a signal suitable for transmission by the modulator 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 copy control information as information for controlling copying, information such as current time, and information on a program to be broadcast. The information of the program to be broadcast includes not only the information of the program to be transmitted, but also the information of the program to be transmitted such as one week's worth of program information.

Note that a plurality of pieces of information are often multiplexed on 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 including a source generation unit 11 and an encoding unit 12, and a multiplex that multiplexes a plurality of pieces of information between the encoding unit 12 and the scramble unit 13. Section (multiplexing section).
<Copy control information>
The copy control information according to the present embodiment will be described with reference to FIGS.
The copy control information is information for controlling restrictions such as permission / prohibition of copying and the number of copies, and is added, for example, by the management information providing unit 16. The copy control information includes a content use descriptor, a digital copy control descriptor, and the like.

FIG. 3 is an example of the structure of a content use descriptor that is one of copy control information. The content use descriptor is generated and added by, for example, the management information adding unit 16, and is stored and transmitted in PSI (Progrm Specific Information) (eg, PMT (Program Map Table) or the like) or SI (Service Information) of MPEG-TS. Information. Note that the SI also includes program information to be broadcast, and the program list is created with reference to the SI.
The content usage descriptor is used (distributed) when describing control information related to accumulation (recording) and output for the program. The meaning is that when the 1-bit field of copy_restriction_mode is “1”, even if digital_recording_control_data of the digital copy control descriptor described in FIG. It is shown that. In the case of “0”, it is not possible to record as “number-limited copy permitted”.

  The content use descriptor is always arranged (transmitted) when the program is a target of output protection. This output protection means that protection is performed on the high-speed digital interface output of the content “copyable without restriction” using the output protection bit (encryption_mode) of the content use descriptor. In other words, the data is encrypted at the time of output on the digital interface or at the time of copying to a recording medium, but the number and generation of copies are not limited. Retransmission to the Internet is virtually impossible. Also called "copy free with output protection" or EPN (encryption plus non-assertion). In addition, if the digital copy control information of the program is “copy of one generation is permitted” and is not a target of “copy permitted with a limited number”, the program is always arranged (transmitted).

FIG. 4 is an example of the description contents of each field of the content use descriptor on the sending side.
In “descriptor_tag”, “0xDE” meaning a content use descriptor is described. “Descriptor_length” describes the descriptor length of the content use descriptor. In “copy_restriction_mode”, “0” is described when the digital copy control information is “copy of one generation is permitted” and is not a target of “copy permitted with a limited number of copies”. If the digital copy control information is “copy of one generation is permitted” and is a target of “copy permitted with limited number”, describe “1”. In “encryption_mode”, “0” is described when the digital copy control information is “copy permitted without restrictions” and protection is performed on the high-speed digital interface output. “Retention_mode” means a temporary storage control bit, and describes “0” indicating that temporary storage is possible even if “digital_recording_control_data” (digital copy control information) of the digital copy control descriptor is “copy prohibited”. I do. “Retention_state” means a temporary accumulation allowable time, and describes “111” indicating that accumulation for one hour and 30 minutes is possible. Note that “image_constraint_token”, “retention_state”, and “encryption_mode” are “1” in the default state. Each field is also described later in FIG. 7 as a process on the receiving side.

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

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

  FIG. 6 is an example of digital copy control information “digital_recording_control_data”. If the digital copy control information is "00", copying is permitted without any restriction, if "01", it is defined by the broadcaster, and if "10", only one generation is copied. Indicates that copying is permitted, and "11" indicates that copying is prohibited. The fact that only one generation can be copied 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 descriptor of FIGS. 3 and 4 is also called copy number restriction information, and the digital copy control information of FIGS. 5 and 6 is also called copy generation restriction information.

  A detailed example of the processing of the receiving device 3 related to the copy control information described in FIGS. 3 to 6 and transmitted from the transmitting device 1 will be described.

  FIG. 7 shows an example of processing for each field of the content use descriptor in the receiving device 3. If “descriptor_tag” is “0xDE”, it is determined that the descriptor is a content use descriptor. Based on “descriptor_length”, it is determined that it is the descriptor length of the content use descriptor. If “copy_restriction_mode” is “1”, if the digital copy control information is “copying is permitted for one generation”, it is determined that the digital copy control information is a target of “copying limited number”. If the digital copy control information is “0”, it is determined that the digital copy control information is not a target of “number-limited copy permitted” when the copy is permitted for one generation. Regarding “image_constraint_token”, it is determined that no limitation is imposed on the resolution of the video signal output regardless of any value. 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", and if the digital copy control information is "copy permitted without restrictions", it is determined that protection is not performed on the high-speed digital interface output. If the digital copy control information is “0”, it is determined that protection is to be performed on the high-speed digital interface output when the digital copy control information is “copy permitted without constraint”.

  If the content use descriptor is not placed (transmitted) for some reason, the fields may be interpreted as having the following values. copy_restriction_mode = ‘1’, image_constraint_token = ‘1’, retention_mode = ‘0’, retention_state = ‘111’, encryption_mode = ‘1’.

  FIG. 8 shows an example of operation related to protection of program content by using the above-described copy control information. “Operable” indicates that the transmission side can select the content corresponding to each service form as generation restriction using digital copy control information. For example, “pay-per-view” indicates that any digital copy control information may be used, while “transmit prohibited” indicates “copy prohibited” for “monthly pay broadcast”. Indicates that selection is not possible. The term "flat / tier" refers to a contract for a plurality of channels collectively for pay broadcasting or the like, which is referred to as a flat contract, and a contract for each channel is referred to as a tier contract. “Other than the above” includes, for example, “in the case of a program that is not pay broadcasting and does not involve content protection”.

  FIG. 9 is an example of control in which the receiving device 3 accumulates (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 "only one generation can be copied", the content shown in FIG. It is stored as "copy prohibited". However, when the copy_restriction_mode is “1”, it is stored as “number-limited copy permitted”. Note that the value of digital_recording_control_data of the digital copy control descriptor does not need to be changed even when accumulation is performed with “recopy prohibited”.

  Also, when digital_recording_control_data of the digital copy control descriptor is “10” and “only one generation can be copied”, a plurality of copies must not be generated. However, accumulation in an area that cannot be accessed by the user for backup purposes is excluded. In addition, it is assumed that the above-mentioned restriction is imposed on each broadcast receiving unit, and when there are a plurality of broadcast receiving units, the above-mentioned restriction is imposed on each broadcast receiving 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 conform to, for example, a standard. When a copy is generated via a high-speed digital interface output, copying may be performed when the number of copies to be generated can be determined by using a move function or the like. For example, when the interface is IEEE1394 and the output destination can be recognized as a device conforming to the DTCP (Digital Transmission Content Protection) standard. The generated copy is set to “re-copy prohibited” or a state equivalent thereto.

  When reproducing and outputting the program content stored as "number-limited copy permitted", the high-speed digital interface performs No More Copies processing specified in DTCP and outputs the result. The analog video output and the digital audio output can be output as "copy of one generation only".

When the recording medium is a removable recording medium, there is another restriction in addition to FIG. Regarding digital recording of program contents on removable recording media, in digital recording of TV, data service, or digital recording of audio service, digital copy control descriptor digital_recording_control_data is "10" and "one generation copy is permitted". When receiving and recording the content, no more than three copies of the received content are allowed, even in the first generation (for example, when receiving and recording a broadcast, the Not recorded). This value (for example, three or more) may conform to, for example, a standard. In addition, a plurality of copies of one generation having the same recording format are not generated. However, digital recording in an area that cannot be accessed by the user for backup purposes is excluded. Also, it is assumed that the recording restriction on the digital recording medium is imposed on each broadcast receiving unit, and when there are a plurality of broadcast receiving units, the above-mentioned restriction is imposed on each broadcast receiving unit. If the receiving device is equipped with a recording method that does not support copy_restriction_mode, the copy_control_type of the digital copy control descriptor is '01' and digital_recording_control_data is '10', regardless of the value of copy_restriction_mode of the content usage descriptor for the program content. First, digitally record with "Only one generation can be copied".
<Receiver>
The receiving apparatus according to the present embodiment will be described with reference to FIGS.

  FIG. 10 is a configuration example of a recording / reproducing device 100 as an example of the recording / reproducing device 10 in the receiving device 3. Note that the recording / reproducing device may be a device having only one of the functions of recording and reproducing.

  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 digital data received from the input terminal 101, and separates the multiplexed bit stream in one transponder into packets such as video and audio. Reference numeral 103 denotes a video / audio information processing unit which 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. A recording medium 105 records digital data, such as a hard disk drive. Reference numeral 106 denotes a display control unit that generates output data from video / audio data and display data of various application interfaces (IFs). For example, video data processed by the video / audio processing unit 103 is scaled as necessary, and image data such as an operation interface or a still image, such as a still image, provided by the recording / reproducing apparatus 100 is displayed by superimposing on the video data. Generate an image. An output terminal 107 transfers generated data to a display device (display unit) such as a display liquid crystal panel. Reference numeral 108 denotes a remote control IF used when the user performs an operation using the remote control. An input terminal 109 is a light receiving unit that receives a signal from a remote controller. An operation unit 110 is provided with a group of buttons for performing operations such as recording and reproduction, and controls the recording / reproduction device 100 by a user directly operating the buttons. A control unit 111 controls the operation of the recording / reproducing apparatus 100, and is configured by, for example, a CPU. Reference numeral 112 denotes a nonvolatile memory for recording information. Reference numeral 113 denotes a system bus for performing data communication between blocks connected to the control unit 111.

  Reference numeral 114 denotes a slot (also referred to as a detachable unit) that allows a detachable recording medium to be loaded. Reference numeral 115 denotes a removable recording medium that performs recording in the same recording format as the recording medium 105. Reference numeral 116 denotes a switch for selecting which data of the recording medium 105 or the removable recording medium 115 is to be output to the recording / reproduction control unit 104 or which data is to be input. Although only one switch is shown in FIG. 10, different switches for input and output may be prepared. Alternatively, a configuration is conceivable in which a recording / reproduction control unit is prepared for each of the recording medium 105 and the removable recording medium 115.

FIG. 11 is a configuration example of the recording / reproduction control unit 104.
An input / output terminal 201 is connected to the system bus 113 to transmit a control signal. An input terminal 202 receives digital data including video data and audio data to be recorded on a recording medium. A copy control information processing unit 203 analyzes copy control information included in digital data and updates the copy control information as necessary. Reference numeral 204 denotes an encryption unit that encrypts the 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. An output terminal 206 is connected to a recording medium. An input terminal 207 inputs digital data to be reproduced from a recording medium. A reproduction control unit 208 issues a command to a recording medium and reproduces desired digital data. A decryption unit 209 decrypts the read encrypted digital data using, for example, key information transmitted from the control unit 111. An output terminal 210 outputs decoded digital data. A system bus 211 performs data communication between each block connected to the control unit.

  When digital data is stored 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 is composed of, for example, a copy control type and digital recording control data, and the content use descriptor is represented by a signal composed of, for example, an encryption mode and a digital recording control mode. The control unit 111 instructs the copy control information processing unit 203 to update the copy control information of the digital data to be stored in the copy control information processing unit 203 and instructs the encryption unit 204 to encrypt / not encrypt according to the values of these descriptors.

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 follows. )
01 Cannot be copied again after recording (No-more-copies)
10 Recording of only one generation is possible (Copy-one-generation)
00 Copy-free
Such a specification is conceivable. It is conceivable that the number-of-copiable-number information is specified by an integer of 0 or more, and how many copies can be specified. Further, digital data whose copy generation management information is “copyable” may include digital data whose data is encrypted and output protected and digital data whose data is not encrypted and whose output is not protected.

  FIG. 12 shows an example of a preferable data structure of the removable recording medium 115 (for example, a removable hard disk). Reference numeral 301 denotes a management area to which the user cannot access. The confidentiality is maintained by storing key data for encrypting digital data and recording it in the data recording area 302 in the management area. Reference numeral 302 denotes a data recording area where a user can access internal data by a predetermined operation. In 301, key data is recorded. 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. Copy control information can be collectively recorded in the management area 301 on such a removable recording medium 115.

FIG. 13 shows another example of a preferable data structure of the recording medium of FIG. 12 in another expression. This recording medium is a recording medium (also referred to as a security removable medium) capable of copy control. The copy control here includes management of a plurality of copies (also referred to as copy number management, copy number control, and number control copy) and / or management of copy generation (copy generation management, copy generation control, and generation control copy). )including. A single recording medium has a normal area that can be accessed by the user and a tamper-resistant area that cannot be accessed by the user. The confidential information stored in the tamper-resistant area can be accessed if 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 / reproducing apparatus 100 shown in FIG. 10, unlike the recording medium 115 shown in FIGS. 12 and 13, the detachable recording medium 115 has a possibility that, for example, management information and program information relating to copy control may be tampered with. If the recording medium is a recording medium or a recording medium that cannot perform copy control (a recording medium that has not been certified by the standards or the like as being compatible with copy control), the recording medium 115 (non-secure recording medium) When recording the digital data input from the 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.
<Screen display processing of program guide, program details, and program search>
The screen display processing of the program guide, program details, and program search of the receiving apparatus in the present embodiment will be described with reference to FIGS.

  In the present embodiment, the case where the user uses the remote control or makes a recording reservation to the recording / reproducing apparatus 100 using the operation unit 110 (the reception unit and the operation unit 110 of the remote control are also collectively referred to as an operation input unit). Think. The digital data input from the input terminal 101 is, for example, a digital broadcast signal. When recording a digital broadcast, it is effective to improve the user's convenience to make a recording reservation using an electronic program guide created based on SI information transmitted from a broadcast station, and generally, it is effective. Recording reservations are often made using electronic program guides.

  When copy control information is added to program content, as described in <copy control information>, when recording and storing the program content, the content must be protected and recorded and stored. If the content usage descriptor and the digital copy control descriptor are inserted in the SI information, the copy generation management information and the number of copies that can be reserved for the program to be reserved at the time of reservation can be ascertained. If the SI information does not contain a content usage descriptor or a digital copy control descriptor, the copy generation management information of the program to be reserved at the time of reservation and the copyable program can be selected. Can't find the quantity information.

  Hereinafter, an example of a process of creating an electronic program guide when the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on copy control corresponding one-to-one with the copy_restriction_mode information will be described.

If the copy control method used for each broadcast network is uniquely determined, for example, if all terrestrial digital broadcasts are “one generation can be copied” and “multiple copies can be made”, all terrestrial digital broadcast programs must be “one copy”. "Only generations can be copied" and "multiple copies allowed" are displayed in the electronic program guide. The following is an example of a copy control method used for each broadcast network.
Digital terrestrial broadcasting: "Only one generation can be copied" and "Multiple copies can be made"
BS free broadcasting: "Only one generation can be copied" and "Multiple copies can be made"
CS free broadcast: "Only one generation can be copied" and "Multiple copies can be made"
BS pay broadcasting: "Copy for one generation only" (Copy-one-generation)
CS paid broadcasting: "Copy for one generation only" (Copy-one-generation)
Hereinafter, details of the electronic program guide creation processing in the receiver 3 will be described.
The digital data input to the input terminal 101 is separated by the receiving unit 102 into video / audio data, SI information, and the like. The control unit 111 creates an electronic program guide to be displayed on the screen based on the SI information (for example, EIT) separated by the receiving unit 102. At this time, copy generation management information and copyable number information (hereinafter collectively referred to as copy control information) are included in the electronic program guide for each broadcast network.

  FIG. 14 is an example of an electronic program guide including copy control information. Reference numeral 1401 denotes a date column indicating a date, and 1402 denotes a time column indicating time. The example of FIG. 14 is an example in which a program list from 5:00 PM to 7:00 PM on the 19th in BS free broadcasting is displayed. Reference numeral 1403 denotes a broadcast-scheduled program column for displaying a broadcast-scheduled program of each broadcasting station, which is separated by a scheduled broadcast time. Reference numeral 1404 denotes a detailed program information field for displaying detailed program information such as a channel, a broadcast date and time, a program name, and copy control information of a program selected by the user using the remote controller or the operation unit 110. In the example of FIG. 14, in the copy control information of the program detailed information column 1404, copy generation information and copyable number information are displayed as character strings. However, the display method may be a character string or an image such as an icon (the same applies to FIG. 15 and thereafter). Further, the copy control information may be only the copy generation information or only the copyable number information, but it is desirable to display the copyable number information (the same applies to FIG. 15 and thereafter).

  Although the copy control information is displayed in the detailed program information column 1404 in the example of FIG. 14, the copy control information may be displayed at each program break in the broadcast scheduled program column 1403. Thus, the copy control information can be identified even if the program list does not include the program detailed information column 1404.

  Also, in the case of the recording / reproducing apparatus 100 which allows the removable recording medium 115 having no management area inaccessible to the user, that is, in the case of the recording / reproducing apparatus 100 which performs recording on a medium which does not support copyright management, FIG. As shown in (1), copy control information in the case of "recording on a copyright management compatible medium" and copy control information in the case of "recording on a non-copyright management compatible medium" are displayed in the program detailed information column 1404. As a result, the convenience of the user can be improved for a recording / reproducing apparatus that can also perform recording on a medium that does not support copyright management.

  Although the copy control information is displayed in the detailed program information column 1404 in the example of FIG. 18, the copy control information may be displayed at each program break in the broadcast scheduled program column 1403. Thus, the copy control information can be identified even if the program list does not include the program detailed information column 1404.

  FIG. 15 shows an example of a detailed program information screen when the user uses the remote control or the operation unit 110 to display the detailed program information. An example of a process for creating a detailed program information screen when copy_restriction_mode information of a content usage descriptor or information on copy control corresponding one-to-one with the content use descriptor is not included in SI information is shown.

  The digital data input to the input terminal 101 is separated into video / audio data and SI information by the receiving unit 102. Based on the SI information separated by the receiving unit 102, the control unit 111 displays a program detail screen on the screen. At this time, copy control information of copy generation management information and copyable number information is included in the program detail screen for each broadcast network. The example of FIG. 15 is an example of a program detail screen of a program of BS free broadcast, in which copy control information is displayed as an icon. However, the display method may be a character string or an image other than an icon. You may.

  Note that, in the case of the recording / reproducing apparatus 100 that allows the removable recording medium 115 having no management area inaccessible to the user (that is, in the case of the recording / reproducing apparatus 100 that performs recording on a medium that does not support copyright management), FIG. As shown in (1), copy control information in the case of "recording on a copyright management compliant medium" and copy control information in the case of "recording on a non-copyright management compliant medium" are displayed. In the example of FIG. 19, icons are displayed. In the case of “recording on a copyright management compatible medium”, up to nine copies can be made, and in the case of “recording on a copyright non-compliant medium”, Indicates that copying is not possible. As a result, the convenience of the user can be improved for a recording / reproducing apparatus that can also perform recording on a medium that does not support copyright management.

  FIG. 16 shows an example of a program search screen when a user searches for a program from a program to be broadcast using the remote controller or the operation unit 110. Reference numeral 1601 denotes various setting columns for setting various settings in the program search. In the present embodiment, copy control information setting items are provided in various setting columns, so that a setting for inserting copy control information into a search target can be performed. In the copy control information setting shown in FIG. 16, "copy free", "(one generation) multiple copies permitted", and "no copy control" can be checked by a check button, and the user performs a search using the checked items. For example, when a search is performed with "(one generation) multiple copies allowed" checked, only the program "(one generation) multiple copies allowed" is displayed as the search result. Of course, a search by keyword and a search by genre can be performed at the same time. A plurality of copy control information settings can be made at the same time, and all the settings can be unchecked.

  When performing a search, the copy control used for each broadcasting network when the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on the copy control corresponding one-to-one with the SI item for the checked item When the system is uniquely determined, all the broadcast programs on the broadcast network are searched as the programs of the copy control information.

  FIG. 17 is an example of a program search result display screen when a program is searched from a program to be broadcast. A list of search results for the copy control information set in the copy control information setting items in FIG. 16 is displayed. Reference numeral 1701 denotes a search result list display field which displays copy control information for the program. The display method may be a character string or an image such as an icon. The copy control information may be only copy generation information or only copyable number information, but it is desirable to display the copyable number information.

  If the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on copy control corresponding one-to-one with the SI information and the copy control method to be used for each broadcast network is uniquely determined, Can be protected as a table, and the table can be stored in a tamper-resistant area that cannot be accessed by the user to protect the copyright.

  In the case where the future operation is uncertain, such as when the BS pay broadcast and CS pay broadcast are currently Copy-one-generation but in the future `` Only one generation can be copied '' and `` Multiple copies are possible '', When the user makes a recording reservation for a program on the broadcast network, a message indicating that there is a possibility of future change may be displayed as shown in FIG. Thereby, even if there is a possibility of change in the future, the user can recognize in advance, and the convenience for the user can be improved.

  Next, as a method of displaying the number-of-copiable-number information in the copy control information of the above embodiment, a case where a program has already been recorded will be considered. It is assumed that a program equivalent to the program to be broadcast is recorded on the removable recording medium 115 inserted in the recording medium 105 or the slot 114. Here, the equivalent program is, for example, a program recorded on different devices and broadcast on the same date and time, or a broadcasted program and a rebroadcasted program. Whether or not the program is equivalent is determined by, for example, a program title, a program number, a channel, a broadcast date and time, a broadcast area, and the like as program identification information. The length (time) of the program, the analysis result of the content of the program (video / audio data), and the like may be added to the factor for determining whether or not they are equivalent. The fact that the contents are equivalent in this way is also expressed as the fact that the contents of the program are duplicated. In the detection, it is not necessary that these pieces of information completely match to judge whether or not they are equivalent. If at least a part (for example, a title) matches, the information becomes equivalent (or not). What is necessary is just to make a judgment.

  A program whose content is equivalent to the program to be broadcast is recorded, and copy control information is added to a program whose content is equivalent to the program to be broadcast, and both pieces of copy control information are added. In this case, the total number of copies of the program scheduled to be broadcast and the number of copies of the program whose recorded contents are equivalent is displayed as the number of copies of the broadcast-scheduled program such as a program list. For example, when the number of copies of a recorded program is six and the number of copies of a program to be broadcast is nine, the number of copies of a program to be broadcast such as a program list is displayed as fifteen. In addition, when copy control information is not added to a program to be broadcast, even if the copy control information is added to a program whose content is equivalent to the recorded content, the copy information is added to the program to be broadcast and displayed. When making a recording reservation, a message is displayed to the effect that "a program whose copy is restricted has been recorded. Do you want to replace it?" As a result, the user can also know the information of the program whose recorded content is equivalent, and the user's convenience can be improved.

  In the present embodiment, the process in the case where the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on copy control corresponding one-to-one with the SI information in the first embodiment is performed according to another determination criterion. It is. Note that the system, transmitting apparatus, copy control information, and receiving apparatus in the present embodiment are the same as those in the first embodiment.

  Hereinafter, a screen display process of a program table, program details, and program search according to the second embodiment of the present invention will be described.

  Most of the screen display processing of the program table, program details, and program search in this embodiment is the same as that in the first embodiment. This is a case where the SI information does not include copy_restriction_mode information of the content usage descriptor or information on copy control corresponding one-to-one with it, and the copy control method used in the broadcast time zone for each channel is uniquely determined.

  When the copy control method to be used in the broadcasting time zone of each channel is uniquely determined, for example, all the weekdays 8:00 to 10:00 of 8 channels of terrestrial digital broadcasting are “one generation copy permitted” and “multiple copies permitted”. In this case, all the weekdays 8:00 to 10:00 of 8 channels of terrestrial digital broadcasting are displayed as "one generation copy permitted" and "multiple copies permitted" in the electronic program guide. Here, in the case of weekdays, all are set, but may be changed for each day of the week. Also, if the future operation is uncertain, such as “Copy all at once” and “Multiple copies allowed” in the future during the Copy-one-generation time zone, the program in the relevant time zone of the relevant channel When a user makes a recording reservation, a message indicating that there is a possibility of future change may be displayed as shown in FIG. Thereby, even if there is a possibility of change in the future, the user can recognize in advance, and the convenience for the user can be improved.

  Further, the copy control method may be uniquely determined for each program, not for the broadcast time zone for each channel. For example, when it is decided that a program such as a serial drama or news program is to be broadcast weekly or daily, the broadcast time zone of the program can be known on the receiver side, so the SI information includes copy_restriction_mode information of the content usage descriptor, or a pair with it. Even when the information about the corresponding copy control is not included, the copy control information of the program can be displayed on the electronic program guide, and the user can make a recording reservation based on the information.

  The screen display of the program details and the program search may be performed by using the same processing as the determination processing of the copy control information shown in the display processing of the electronic program guide, and the other processing is the same as that of the first embodiment. .

  In the present embodiment, the process in the case where the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on copy control corresponding one-to-one with the SI information in the first embodiment is performed according to another determination criterion. It is. Note that the system, transmitting apparatus, copy control information, and receiving apparatus in the present embodiment are the same as those in the first embodiment.

  Hereinafter, a screen display process of a program table, program details, and program search according to the third embodiment of the present invention will be described.

  Most of the screen display processing of the program table, program details, and program search in this embodiment is the same as that in the first embodiment.

  Prepares a program content copy control table that lists the program content that is currently being broadcasted and will be broadcasted on the transmitting side such as a broadcasting station and the copy_restriction_mode information of the content usage descriptor for the program content, or information on copy control that corresponds one-to-one with it. I do. FIG. 21 shows an example of the program content copy control table. In FIG. 21, the content ID (for example, event_id of MPEG-2 TS) for uniquely identifying the program content and the program name are listed, but only the content ID for uniquely identifying the program content may be used. In FIG. 21, only digital_recording_control_data of the digital copy control descriptor and copy_restriction_mode of the content use descriptor are described as copy control information, but the entire digital copy control descriptor and the entire content use descriptor may be described respectively. .

The broadcasting station creates the program content copy control table containing the program content copy control information for a certain period, and the multiplex section (multiplexing section) not shown in FIG. The signals are multiplexed and transmitted from the transmission antenna 15.
Hereinafter, processing in the receiving device 100 will be described.

  The digital data input to the input terminal 101 is separated by the receiving unit 102 into video / audio data, SI information, a program content copy control table multiplexed with broadcast waves on the transmission side, and the like. Based on the SI information (for example, EIT) separated by the receiving unit 102, the control unit 111 displays an electronic program guide on a screen. At this time, the copy control information (copy generation management information and copyable number) of the content ID that uniquely identifies the program content in the program content copy control table that matches the content ID that uniquely identifies the program content included in the SI information Information) in the electronic program guide. Note that the determination may be made based on the program name or the like instead of the content ID.

  As a result, even when the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on the copy control corresponding one-to-one with the SI, the copy control information for each program can be grasped, and the copy control information can be obtained electronically. The program can be displayed in a program guide, the user can select a program to be reserved for recording based on the copy control information, and user convenience can be improved.

  The screen display of the program details and the program search may be performed by using the same processing as the determination processing of the copy control information shown in the display processing of the electronic program guide, and the other processing is the same as that of the first embodiment. .

The present embodiment is a case where a network is used for the transmitting / receiving means of the program content copy control table in the third embodiment.
Hereinafter, different points from the third embodiment will be described.
<System>
A system according to the present embodiment will be described with reference to FIG.
FIG. 22 is a block diagram illustrating a configuration example of a system according to the present embodiment, in which a server connected to a network is added to the block diagram of FIG.

  Reference numeral 4 denotes a server installed at an information providing station such as a broadcasting station or a service provider, and is connected to a network such as the Internet.

The server 4 is a program content copy control that lists the program content currently being broadcasted and to be broadcasted shown in FIG. 21 and copy_restriction_mode information of the content use descriptor for the program content, or information on copy control corresponding one-to-one with the program content. Save the table. If there is a connection request and a program content copy control table request from the receiver side, the program content copy control table is transmitted via the network in response to the request. When the request is received, the request may be transmitted after performing authentication such as device authentication. In this case, more secure communication can be performed. Also, requests from anyone other than the service provider can be rejected, and the service supply range can be limited.
The other parts of the system according to the present embodiment are the same as those of the third embodiment.
<Transmission device>
The transmitting device according to the present embodiment is the same as that of the third embodiment.
<Copy control information>
The copy control information in the present embodiment is the same as in the third embodiment.
<Receiver>
The receiving apparatus according to the present embodiment is the same as the third embodiment, but may have a configuration as shown in FIG.

FIG. 23 is almost the same as the recording / reproducing apparatus shown in FIG. 10 except that input of copy control information to the recording / reproducing control unit 104 is different. Reference numeral 141 denotes a network transmission / reception terminal which transmits / receives data via a network such as the Internet. Reference numeral 142 denotes a network transmission / reception unit which analyzes data transmitted / received at the network transmission / reception terminal and performs protocol processing. 142 is controlled by the control unit 111 connected by a system bus. When data is transmitted, the data is transmitted from the network transmission / reception terminal 141. Enter
<Screen display processing of program guide, program details, and program search>
Most of the screen display processing of the program guide, program details, and program search of the receiving apparatus in the present embodiment is the same as that of the third embodiment. Hereinafter, portions different from the third embodiment will be described.

  In the third embodiment, the program content copy control table shown in FIG. 21 is multiplexed with the broadcast wave and transmitted. In this embodiment, the broadcast is transmitted via the network. Specifically, a program listing a program content that is currently being broadcast on or on the transmitting side such as a broadcasting station and copy_restriction_mode information of a content usage descriptor for the program content, or information on copy control corresponding one-to-one with the program content The content copy control table is prepared in the server 4 and is ready to be transmitted via the network at any time. On the receiver side, the same processing as in the third embodiment is performed on the broadcast wave. Also, a request instruction of the program content copy control table is requested to the server 4 via the network, and if necessary, the server side performs an authentication process such as device authentication to acquire the program content copy control table. When the user uses the remote control or uses the operation unit 110 to display the electronic program guide, the control unit 111 acquires SI information from the broadcast wave, and based on the SI information, the control unit 111 displays the electronic program guide on the screen. indicate. At this time, copy control information (copy generation management information and copy available information) of the content ID uniquely identifying the program content in the program content copy control table that matches the content ID uniquely identifying the program content included in the SI information. Number information) is included in the electronic program guide. Note that the determination may be made based on the program name or the like instead of the content ID.

  Thus, even when the SI information does not include copy_restriction_mode information of the content use descriptor or information on copy control corresponding to the content use descriptor on a one-to-one basis, the copy control information for each program is not multiplexed with the broadcast wave. Can be grasped, the copy control information can be displayed in an electronic program guide, the user can select a program to be reserved for recording based on the copy control information, and user convenience can be improved.

  The screen display of the program details and the program search may be performed by using the same processing as the determination processing of the copy control information shown in the display processing of the electronic program guide, and the other processing is the same as the third embodiment. .

  In the present embodiment, the processing in the case where the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information relating to the copy control corresponding one-to-one with the SI information in the first embodiment and is included in the PSI information. This is performed according to another criterion. Note that the system, transmitting device, and copy control information in the present embodiment are the same as those in the first embodiment.

  Hereinafter, the screen display processing of the receiving device, the program guide, the program details, and the program search in the third embodiment of the present invention will be described.

  The receiving apparatus in this embodiment is almost the same as that in the first embodiment, but includes a plurality of input terminals 101 and a plurality of receiving units 102 in FIG. Here, for the sake of simplicity, it is assumed that there are two input terminals and two receiving units, and FIG. 24 shows an example of the configuration of a recording / reproducing apparatus 150 in which the number of input terminals and receiving units is two in FIG.

  An input terminal 151 has the same function as the input terminal 101. A receiving unit 152 has the same function as the receiving unit 102. That is, frequency conversion, modulation operation, error correction, and the like are performed on digital data received from the input terminal 101 or the input terminal 151, and the multiplexed bit stream in one transponder is separated into packets such as video and audio. The video / audio separated by the receiving unit 102 or the receiving unit 152 is processed by the video / audio information processing unit 103. Similarly, the copy control information separated by the receiving unit 102 or the receiving unit 152 is processed by the recording / reproducing control unit 104. The details of the processing are the same as in the first embodiment.

Next, screen display processing of a program table, program details, and program search will be described.
Most of the screen display processing of the program table, program details, and program search in this embodiment is the same as that in the first embodiment.

  After the data received by the input unit 101 of the recording / reproducing device 150, which is a receiving device, is processed by the receiving unit 102 and the video / audio information processing unit 103, video / audio is output from the display control unit 106 via the output terminal 107. . At this time, the input terminal 151 and the receiving unit 152 that are not performing video / audio output circulate and receive broadcast waves of all channels being broadcast. That is, a broadcast wave of a certain channel is received at the input terminal 151, and copy control information included in the PSI information of the program and a content ID for uniquely identifying the program content (for example, event_id of MPEG-2 TS) are received by the receiving unit 152. To get. A program content copy control table listing the acquired content IDs and copy control information is created and recorded on the recording medium 105 or the removable recording medium 115. The program content copy control table is the same as that shown in FIG. 21. The program name may be listed, or only the program name may be used instead of the content ID. Preferably, the program content copy control table is recorded in the tamper-resistant area of the recording medium 105 and the removable recording medium 115. After adding the copy control information of the program to the program content copy control table, the other channel is selected and the same processing is performed to add the copy control information of the program to the program content copy control table.

  Next, processing when the user uses the remote control or the operation unit 110 to display the electronic program guide will be described. The digital data input to the input terminal 101 is separated into video / audio data, SI information, and the like by the receiving unit 102. Based on the SI information (for example, EIT) separated by the receiving unit 102, the control unit 111 displays an electronic program guide on a screen. At this time, if the copy control information of the content ID is included in the program content copy control table recorded on the recording medium 105 or the removable recording medium 115, the copy control information (copy generation management information and copyable number information ) Is included in the electronic program guide. Note that the determination may be made based on the program name or the like instead of the content ID.

  Accordingly, even when the SI information does not include the copy_restriction_mode information of the content use descriptor or the information on copy control corresponding to the content use descriptor on a one-to-one basis, a program broadcast regularly (eg, a news program or a serial drama) such as weekly or daily. ) Or copy control information of a program broadcast once in the past. Further, there is no need to create a program content copy control table on the transmission side, and it is not necessary to install a special device on the transmission side.

  As a result, the copy control information can be displayed in the electronic program guide, the user can select a program to be reserved for recording based on the copy control information, and user convenience can be improved.

  The screen display of the program details and the program search may be performed by using the same processing as the determination processing of the copy control information shown in the display processing of the electronic program guide, and the other processing is the same as that of the first embodiment. .

  The present embodiment is an embodiment in which the program content copy control table obtained by each means in the third to fifth embodiments is used for recording / reproduction control in another recording / reproduction device. The system, transmitting apparatus, copy control information, and receiving apparatus in the present embodiment are the same as those in the third, fourth, and fifth embodiments.

  Hereinafter, a screen display process of a program table, program details, and program search according to the sixth embodiment of the present invention will be described.

  Most of the screen display processing of the program table, program details, and program search in this embodiment is the same as the processing in each embodiment.

  First, the program content copy control table obtained in each embodiment is stored in the removable recording medium 115. Preferably, the program content copy control table is stored in a tamper-resistant area of the removable recording medium 115.

  The removable recording medium 115 storing the program content copy control table is inserted into the slot 114 of the recording / reproducing apparatus which is the receiving apparatus in the present embodiment. Note that the recording / reproducing apparatus in this embodiment is the same as that shown in FIG.

  The digital data input to the input terminal 101 is separated into video / audio data, SI information, and the like by the receiving unit 102. Based on the SI information (for example, EIT) separated by the receiving unit 102, the control unit 111 displays an electronic program guide on a screen. At this time, if the copy control information of the content ID is included in the program content copy control table recorded on the removable recording medium 115, the copy control information (copy generation management information and copyable number information) is stored in the electronic program. Include in table. Note that the determination may be made based on the program name or the like instead of the content ID.

When the SI information does not include the copy_restriction_mode information of the content usage descriptor or the information on copy control corresponding to the content use descriptor on a one-to-one basis, the recording / reproducing apparatus processes the program content copy control table multiplexed on the broadcast wave. When there is no function (Embodiment 3), or when the recording / reproducing apparatus does not have a function of processing the program content copy control table via the network (Embodiment 4), or when the program content is Even when there is no function of generating and processing a copy control table (Embodiment 5), copy control information for each program can be grasped.
As a result, the copy control information can be displayed in the electronic program guide, the user can select a program to be reserved for recording based on the copy control information, and user convenience can be improved.

  The screen display of the program details and the program search may be performed by using the same processing as the determination processing of the copy control information shown in the display processing of the electronic program guide, and the other processing is the same as that of the first embodiment. .

  DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus 2 ... Relay apparatus 3 ... Receiving apparatus 11 ... Source generation part 12 ... Encoding part 13 ... Scramble part 14 ... Modulation part 15 ... Transmission antenna 16 ... Management information adding unit 10, 100 ... Recording / reproducing device 101,109,201,202,207 ... Input terminal 102 ... Receiving unit 103 ... Image / audio signal processing unit 104 ... Recording / reproduction control unit 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 208 ・ ・ ・ Reproduction control Section 209 ... decoding unit 114 ... slot 115 ... removable recording medium 116 ... switch

Claims (2)

In a digital content receiving device that receives the transmitted digital content,
The digital content includes:
First copy control information used at the time of reservation for recording of the digital content,
Second copy control information which is information used when recording the digital content and has a state indicating that at least one generation copy is possible for the digital content;
And copy control mode information indicating whether or not the digital content received when the second copy control information is one-generation copyable is content with a limited number of copies,
A receiving unit that receives the transmitted digital content,
A first recording medium that is a recording medium corresponding to recording of the digital content based on the copy control mode information;
A reservation unit for making a reservation for recording the digital content on the first recording medium;
A recording unit that records the received digital content on the first recording medium;
A control unit that controls the reservation unit, the reception unit, and the recording unit,
In the control state in the control unit,
A first state in which a reservation for recording the digital content on the first recording medium is made using the first copy control information;
When the second copy control information indicates that the first generation copy is permitted, and the copy control mode information indicates that the received digital content is a number-limited copy-permitted content, A second state in which is recorded on the first recording medium, and the number of digital copies that can be generated from the recorded digital content is managed within a predetermined number;
When the second copy control information is copy permitted for one generation and the copy control mode information is not attached to the received digital content, the received digital content is recorded on the first recording medium. A third state of managing the number of digital copies that can be generated from the recorded digital content to be within the predetermined number;
Digital content receiving device characterized by the following. In a digital content receiving method for receiving transmitted digital content,
The digital content includes:
First copy control information used at the time of reservation for recording of the digital content,
Second copy control information which is information used when recording the digital content and has a state indicating that at least one generation copy is possible for the digital content;
And copy control mode information indicating whether or not the digital content received when the second copy control information is one-generation copyable is content with a limited number of copies,
A reservation step of making a reservation for recording the digital content on a first recording medium corresponding to recording of the digital content based on the copy control mode information,
A receiving step of receiving the transmitted digital content;
Recording the received digital content on the first recording medium,
In the reservation step,
Using the first copy control information, there is a first state of making a reservation for recording the digital content on the first recording medium,
In the recording step,
When the second copy control information indicates that the first generation copy is permitted, and the copy control mode information indicates that the received digital content is a number-limited copy-enabled content, A second state in which is recorded on the first recording medium, and the number of digital copies that can be generated from the recorded digital content is managed within a predetermined number;
When the second copy control information is copy permitted for one generation and the copy control mode information is not attached to the received digital content, the received digital content is recorded on the first recording medium. A third state of managing the number of digital copies that can be generated from the recorded digital content to be within the predetermined number;
A method for receiving digital content, comprising:

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