JP6602991B2 - Digital content receiving apparatus and digital content receiving method - Google Patents

Description

  The technical field relates to a program receiving apparatus. 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 ".

  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 that can be copied by only one generation. The figure which describes and displays copyright management information in the program information list to improve user convenience is described.

JP 2006-1114090 A JP 2006-244603 A

  In recent years, with the widespread use of digital broadcasting, various recording media have been distributed, and various forms of viewing digital content have become available. Under such circumstances, from the viewpoint of copyright protection, it is conceivable to control data transmission / reception among a plurality of recording / reproducing apparatuses or recording media by using copy control information. However, the control based on the copy control information makes it difficult to determine whether or not copying is possible between arbitrary devices, thus reducing the usability of the user. The digital information recording / reproducing method disclosed in Patent Document 1 improves the usability by managing the number of 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, it is assumed that only copy control information and / or the number of times of copying of digital data recorded on a recording medium is displayed to the user. There is no description up to the user display method in the reservation.
Further, in the digital information recording / reproducing apparatus disclosed in Patent Document 2, only copy generation management information is assumed as copy control information, and means for displaying copyable number information to the user is not disclosed.

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

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

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

It is a block diagram which shows the structural example of a system. 3 is a block diagram illustrating a configuration example of a transmission device 1. FIG. It is an example of the structure of the content use descriptor which is one of copy control information. This is a description example for each field of the content usage descriptor. It is an example of the structure of the digital copy control descriptor which is one of copy control information. It is an example of the information which controls a copy generation. It is an example of the reception process in the receiver 3 of each field of the content use descriptor sent from the transmitter 1. This is an operation example of protection of program content by using the copy control information by the transmission apparatus 1. This is an example of control when the receiving device 3 stores (records) program content using copy control information. 2 is a block diagram illustrating a configuration example of a recording / reproducing apparatus 10. FIG. 3 is a block diagram illustrating a configuration example of a recording / playback control unit 104. FIG. It is a schematic diagram which shows the 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 the example of a screen which displays a list of the broadcast schedule programs. 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 list of the result of a program search. It is a schematic diagram which shows the example of a screen which displays a list of the broadcast schedule programs. 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 notifies the possibility that copy control information will be changed. It is an example of a program content copy control table. It is a block diagram which shows the structural example of the system in a 3rd Example. It is a block diagram which shows the structural example of the recording / reproducing apparatus 10 in a 4th Example. It is a block diagram which shows the structural example of the recording / reproducing apparatus 10 in a 5th Example.

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

This embodiment is an embodiment of the receiving apparatus of the present invention. Hereinafter, the present embodiment will be described with reference to the drawings, divided into a system, a transmission device, copy control information, a reception device, a program guide, program details, and program search screen display processing.
<System>
The system in the present embodiment will be described with reference to FIG.
FIG. 1 is a block diagram illustrating a configuration example of a system in 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 (Video On Demand) by communication, and is also collectively referred to as distribution.

  1 is a transmission device installed in an information providing station such as a broadcasting station, 2 is a relay device installed in a relay station, a broadcasting satellite, or the like, 3 is a receiving device installed in a user's home, etc. 10 is a receiving device 3 This is a reception recording / reproducing unit that is built in or externally attached. 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>
A transmission apparatus according to this embodiment will be described with reference to FIG.
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 using the MPEG method, 13 denotes a scrambling unit, 14 denotes a modulation unit, 15 denotes a transmission antenna, and 16 denotes a management information addition unit. Information such as video and audio generated by the source generation unit 11 including a camera and a recording / playback device is compressed by the encoding unit 12 so that it can be transmitted in a smaller occupied band. If necessary, the scrambler 13 performs transmission encryption so that a specific viewer can view. After modulation to be a signal suitable for transmission by the modulation unit 14, the signal is transmitted from the transmission antenna 15 to the relay device 2 as a radio wave. At this time, the management information adding unit 16 adds copy control information that is information for controlling copying, information such as the current time, and broadcast program information. This broadcast program information includes not only program information to be transmitted but also program information to be transmitted such as one week of program information.

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>
Copy control information in this embodiment will be described with reference to FIGS.
The copy control information is information for controlling restrictions such as whether or not copying is possible, and is added by the management information adding unit 16, for example. The copy control information includes a content use descriptor and a digital copy control descriptor.

FIG. 3 shows an example of the structure of a content usage descriptor that is one of copy control information. The content usage descriptor is generated and added by, for example, the management information adding unit 16 and is stored and transmitted in MPEG-TS PSI (Progrm Specific Information) (for example, PMT (Program Map Table)) or SI (Service Information). Information. The SI also includes program information scheduled to be broadcast, and the program list is created by referring to the SI.
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 copy_restriction_mode is “1”, even if digital_recording_control_data of the digital copy control descriptor described in FIG. Indicates that 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 encryption is performed at the time of output at a digital interface or copying to a recording medium, the number of copies and generation are not limited. 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 “copyable for only one generation” and is not a target of “number limited copy is possible”.

FIG. 4 is an example of the description contents of each field of the content use descriptor on the transmission side.
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 “copy_restriction_mode”, “0” is described when the digital copy control information is “copyable for only one generation” and is not the target of “number limited copy allowed”. When the digital copy control information is “copying is possible for only one generation” and the target is “copying limited number of copies”, “1” is described. In “encryption_mode”, “0” is described in the case where the digital copy control information is “copying possible without constraint” 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, which is one piece of copy control information. The digital copy control descriptor is, for example, information generated and added by 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 is an example of digital copy control information “digital_recording_control_data”. If the digital copy control information is “00”, it indicates that copying is possible without restriction, “01” indicates that it is defined by the broadcaster, and if “10”, only one generation is copied. “11” indicates that copying is prohibited. Note 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 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 is an example of processing for each field of the content usage descriptor in the reception 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 as the descriptor length of the content use descriptor. If “copy_restriction_mode” is “1”, when the digital copy control information is “copying is possible for only one generation”, it is determined that it is a target of “number-restricted copying is possible”. If it is “0”, if the digital copy control information is “copying is possible for only one generation”, it is determined that it is not the target of “number limited copying is possible”. 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. 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 copy control information described above. “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. 9 is 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, when digital_recording_control_data of the digital copy control descriptor is “10” and “only one generation can be copied”, the content shown in FIG. Accumulate as "copy prohibited". However, when copy_restriction_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.

  Also, when the 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, 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 IEEE1394 and the output destination is a device compatible with the DTCP (Digital Transmission Content Protection) standard. The generated copy is set to “recopy prohibited” or an equivalent state.

  In addition, when reproducing and outputting program content stored as “Number Limited Copy Allowed”, the high-speed digital interface performs processing of No More Copies defined in DTCP and outputs it. The analog video output and digital audio output can be output as “one generation can be copied”.

When the recording medium is a removable recording medium, there is another limitation in addition to FIG. For digital recording of program content to removable recording media, for digital recording of TV, data service, or audio service, the digital copy control descriptor digital_recording_control_data is '10' and "only one generation can be copied" When receiving and recording content, even if it is the first generation of the received content, 3 or more copies are not allowed (for example, when 3 or more recording media are received simultaneously when receiving and recording a broadcast) Do not record). 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 copy_restriction_mode, the program content whose copy_control_type in the digital copy control descriptor is '01' and whose digital_recording_control_data is '10' depends on the copy_restriction_mode value in the content usage descriptor. First of all, digital recording is performed by handling "one generation can be copied".
<Receiving device>
A receiving apparatus according to this embodiment will be described with reference to FIGS.

  FIG. 10 is a configuration example of a recording / reproducing apparatus 100 as an example of the recording / reproducing apparatus 10 in the receiving apparatus 3. The recording / reproducing apparatus may be an apparatus having only one function of recording and reproduction.

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

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
The specification like this is considered. 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. Copy control information can also be recorded in the management area 301 collectively on such a removable recording medium 115.

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 / reproducing apparatus 100 shown in FIG. 10, the detachable recording medium 115 is different from those shown in FIGS. 12 and 13, for example, management information and program information related to copy control may be tampered with. If it is a certain recording medium or a recording medium that cannot be copy-controlled (recording medium that is not certified by the standard as being compatible with copy control), input to this 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.
<Program display, program details, program search screen display processing>
Screen display processing of the program table, program details, and program search of the receiving apparatus in this embodiment will be described with reference to FIGS.

  In this embodiment, a case where the user uses a remote controller or makes a recording reservation in the recording / reproducing apparatus 100 using the operation unit 110 (the reception unit and the operation unit 110 of the remote control are collectively referred to as an operation input unit). Think. The digital data input from the input terminal 101 is assumed to be a digital broadcast signal, for example. When recording digital broadcasts, it is effective to improve the convenience for users to make recording reservations using an electronic program guide created based on SI information sent from broadcast stations. Recording reservations are often made using an electronic program guide.

  When copy control information is attached 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 a content usage descriptor or digital copy control descriptor is inserted in the SI information, the copy generation management information and copyable number information of the program reserved at the time of reservation can be grasped, so that the recording destination can be a corresponding storage medium. , You can select and reserve a program that can be copied multiple times, but if the SI information does not have a content usage descriptor or digital copy control descriptor, you can copy the copy generation management information of the program reserved at the time of reservation or copy it I can not grasp the number information.

  Hereinafter, an example of processing for creating an electronic program guide in the case where copy_restriction_mode information of a content usage descriptor or information regarding copy control corresponding to the content usage descriptor is not included in SI information will be described.

When the copy control method to be used for each broadcast network is uniquely determined, for example, when all terrestrial digital broadcasting is “copyable for only one generation” and “multiple copies are possible”, all terrestrial digital broadcast programs are “one copy”. “Only generations can be copied” and “multiple copies are possible” are displayed on the electronic program guide. The following is an example of a copy control method used for each broadcast network.
Terrestrial digital broadcasting: “Copying is possible for one generation” and “Multiple copies are possible”
BS free broadcast: "Only one generation can be copied" and "Multiple copies are possible"
CS free broadcast: "Only one generation can be copied" and "Multiple copies are possible"
BS pay broadcasting: "Copyable for one generation only" (Copy-one-generation)
CS paid broadcasting: “Copying for one generation only” (Copy-one-generation)
Details of the electronic program guide creation process in the receiver 3 will be described below.
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 creates an electronic program guide to be displayed on the screen. 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 representing a date, and reference numeral 1402 denotes a time column representing a time. In the example of FIG. 14, a list of programs from 19 pm to 5 pm on BS free broadcast is displayed. Reference numeral 1403 denotes a broadcast schedule program column for displaying a broadcast schedule program of each broadcast station, which is divided by the scheduled broadcast time. Reference numeral 1404 denotes a program detailed information column for displaying program detailed information such as the channel of the program selected by the user using the remote controller or the operation unit 110, broadcast date and time, program name, and copy control information. In the example of FIG. 14, the copy generation information and copyable number information are displayed as character strings in the copy control information in the program details information field 1404. However, the display method may be displayed as a character string or may be displayed as an image such as an icon (the same applies to FIG. 15 and subsequent figures). 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 (the same applies to FIG. 15 and subsequent figures).

  In the example of FIG. 14, the copy control information is displayed in the program detailed information column 1404. However, the copy control information may be displayed at each program break in the broadcast scheduled program column 1403. As a result, the copy control information can be identified without the program detail information column 1404 in the program list.

  Further, in the case of the recording / reproducing apparatus 100 that allows a removable recording medium 115 that does not have a management area that cannot be accessed by 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 FIG. 4, the program detailed information column 1404 displays 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 copyright management-incompatible medium”. As a result, the convenience of the user can also be improved with respect to a recording / reproducing apparatus capable of recording on a copyright management non-compliant medium.

  In the example of FIG. 18, the copy control information is displayed in the program detailed information column 1404. However, the copy control information may be displayed at each program break in the broadcast scheduled program column 1403. As a result, the copy control information can be identified without the program detail information column 1404 in the program list.

  FIG. 15 is an example of a program detailed information screen when the user uses the remote control or displays the detailed information of the program using the operation unit 110. An example of the process which produces the program detailed information screen when copy_restriction_mode information of a content use descriptor or information regarding copy control corresponding to the content usage 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 generation management information and copy control information of copyable number information are included in the program detail screen for each broadcast network. The example of FIG. 15 is an example of a program details screen of a BS free broadcast program, and the copy control information is displayed as an icon. However, the display method may be a character string or an image other than an icon. May be.

  In the case of the recording / reproducing apparatus 100 that allows a detachable recording medium 115 that does not have a management area that cannot be accessed by the user (that is, the recording / reproducing apparatus 100 that performs recording on a medium that does not support copyright management), FIG. As shown, the copy control information in the case of “recording on a copyright management-compatible medium” and the copy control information in the case of “recording on a medium not compatible with copyright management” 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. In the case of “recording on a medium not supporting copyright management”, Indicates that copying is not possible. As a result, the convenience of the user can also be improved with respect to a recording / reproducing apparatus capable of recording on a copyright management non-compliant medium.

  FIG. 16 shows an example of a program search screen when the user searches for a program from a program scheduled to be broadcast using the remote controller or using the operation unit 110. Reference numeral 1601 denotes various setting fields for setting various settings for program search. In this embodiment, copy control information setting items are provided in various setting fields so that the copy control information can be set to be searched. In the copy control information setting of FIG. 16, “copy free”, “(one generation) multiple copies allowed”, “no copy control” can be checked with check buttons, and a search is performed with the items checked by the user. For example, when a search is made with “(one generation) multiple copy allowed” checked, only the program “(one generation) multiple copy allowed” is displayed as the search result. Of course, keyword search and genre search can be performed simultaneously. Note that a plurality of settings can be made at the same time for the copy control information setting, and all can be unchecked.

  When performing a search, copy control to be used for each broadcast network when SI_information does not include copy_restriction_mode information in the content usage descriptor or one-to-one copy control information corresponding to the checked item. When the system is uniquely determined, all broadcast programs on the broadcast network are searched as the program 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 scheduled to be broadcast. The search results for the copy control information set in the copy control information setting item of FIG. 16 are displayed in a list. Reference numeral 1701 denotes a search result list display field, which is displayed including copy control information for the program. The display method may be displayed as a character string or may be displayed as 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 copy control method to be used for each broadcast network is uniquely determined when the SI information does not include the copy_restriction_mode information of the content usage descriptor or the copy control information corresponding to the content usage descriptor, it is determined for each broadcast network. The copy control method can be managed as a table, and the copyright can be protected by storing the table in a tamper-resistant area that the user cannot access.

  In addition, if 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 it is possible to copy only one generation and multiple copies are possible, When a user makes a recording reservation for a program on the broadcast network, as shown in FIG. 20, a message indicating that there is a possibility of future change may be displayed. Thereby, even when there is a possibility of future changes, the user can recognize in advance, and the convenience of the user can be improved.

  Next, let us consider a case where a program has already been recorded as a method of displaying copyable number information in the copy control information of the above embodiment. It is assumed that a program equivalent in content to the program scheduled to be broadcast is recorded on the recording medium 105 or the removable recording medium 115 inserted in the slot 114. Here, the program having the same content is, for example, a program broadcast on the same date and time recorded by different devices, or a broadcast program and a rebroadcast program. Whether or not it is an equivalent program is determined, for example, by using the program title, program number, channel, broadcast date and time, broadcast area, etc. as program identification information. The program length (time), the analysis result of the contents of the program (video / audio data), and the like may be added to the determination factors as to whether they are equivalent. The fact that the contents are equivalent in this way is also expressed as overlapping contents of the program. The detection does not require that these pieces of information completely match in order to determine whether they are equivalent, but is equivalent (isn't it) because at least a part (for example, title) matches? Judgment should be made.

  A program equivalent in content to the program scheduled to be broadcast is recorded, and copy control information is added to the program equivalent to the program scheduled to be broadcast and the recorded content, both of which are provided with copyable number information. In this case, the total number of copies of programs scheduled to be broadcast and the total number of copies of programs whose recorded contents are equivalent are displayed as the number of copies of programs scheduled to be broadcast 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 scheduled to be broadcast is nine, the number of copies of a program scheduled to be broadcast such as a program list is displayed as fifteen. In addition, when copy control information is not added to a program scheduled to be broadcast, even if copy control information is added to a program whose recorded content is equivalent, the copy information is added to the program scheduled to be broadcast and displayed. However, when a recording reservation is made, a message saying “A program with restricted copy has been recorded. Do you want to replace it?” Is displayed so that the user can select it. Thereby, the user can know the information of the program whose recorded contents are equivalent together, and the convenience of the user can be improved.

  In the present embodiment, the processing when the SI information does not include copy_restriction_mode information in the content usage descriptor or one-to-one copy control information corresponding to the SI information in the first embodiment is performed based on another criterion. It is. The system, transmission device, copy control information, and reception device in this embodiment are the same as those in the first embodiment.

  The screen display processing for program guide, program details, and program search in the second embodiment of the present invention will be described below.

  Most of the screen display processing of the program guide, 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 to the content usage descriptor, and the copy control method used in the broadcast time zone for each channel is uniquely determined.

  If the copy control method to be used in the broadcast time zone for each channel is uniquely determined, for example, all terrestrial digital broadcasting 8ch weekdays from 8:00 to 10:00 are “only one generation can be copied” and “multiple copies can be made” In this case, all terrestrial digital broadcast 8ch weekdays from 8:00 to 10:00 are displayed on the electronic program guide as “one generation can be copied” and “multiple copies are possible”. Here, it is all on weekdays, but may be changed every day of the week. Also, if the future operation is uncertain, such as the copy-one-generation time zone or the future when it is possible to copy only at the same time and “multiple copies are possible”, the program for the time zone of the channel When the user makes a recording reservation, as shown in FIG. 20, a message indicating that there is a possibility of change in the future may be displayed. Thereby, even when there is a possibility of future changes, the user can recognize in advance, and the convenience of 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 determined that a series drama or news program is broadcast every week or every day, the broadcast time zone of the program is known on the receiver side, so copy_restriction_mode information in the content usage descriptor or paired with the SI information. Even when the information regarding the copy control corresponding to one is not included, the copy control information of the program can be displayed in the electronic program guide, and the user can make a recording reservation based on the information.

  The program details and the program search screen display may be equivalent to the copy control information determination process shown in the electronic program guide display process, and the other processes are the same as those in the first embodiment. .

  In the present embodiment, the processing when the SI information does not include copy_restriction_mode information in the content usage descriptor or one-to-one copy control information corresponding to the SI information in the first embodiment is performed based on another criterion. It is. The system, transmission device, copy control information, and reception device in this embodiment are the same as those in the first embodiment.

  The screen display processing for program guide, program details, and program search in the third embodiment of the present invention will be described below.

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

  A program content copy control table that lists copy_restriction_mode information of the program content currently being broadcast on the transmission side such as a broadcasting station and the content usage descriptor for the program content, or information related to copy control corresponding to the content, is prepared. To do. FIG. 21 shows an example of the program content copy control table. In FIG. 21, a content ID for uniquely identifying program content (for example, event_id of MPEG-2 TS) and a program name are included in the list, but only a content ID for uniquely identifying 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 usage descriptor are described as copy control information. However, the entire digital copy control descriptor and the entire content usage descriptor may be described, respectively. .

The broadcast station creates the program content copy control table containing the program content copy control information for a certain period, and the program content copy control table is added to the broadcast wave by a multiplex unit (multiplexing unit) not shown in FIG. Multiplexed and transmitted from the transmitting antenna 15.
Hereinafter, processing in the receiving apparatus 100 will be described.

  The digital data input to the input terminal 101 is separated into video / audio data, SI information, and a program content copy control table multiplexed on a broadcast wave on the transmission side by the receiving unit 102. Based on the SI information (for example, EIT) separated by the receiving unit 102, the control unit 111 displays the electronic program guide on the screen. At this time, copy control information (copy generation management information and the number of copies that can be copied) 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. The determination may be made not by the content ID but by the program name.

  As a result, even if the SI information does not include copy_restriction_mode information in the content usage descriptor, or information related to copy control corresponding to it, copy control information for each program can be grasped, and copy control information can be electronically stored. The program can be displayed on the program guide, and the user can select the program to be reserved for recording based on the copy control information, so that the convenience for the user can be improved.

  The program details and the program search screen display may be equivalent to the copy control information determination process shown in the electronic program guide display process, and the other processes are the same as those in the first embodiment. .

This embodiment is a case where a network is used as the transmission / reception means of the program content copy control table in the third embodiment.
Hereinafter, differences from the third embodiment will be described.
<System>
The system in the present embodiment will be described with reference to FIG.
FIG. 22 is a block diagram illustrating a system configuration example 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 in an information providing station such as a broadcasting station or a service provider, which is connected to a network such as the Internet.

The server 4 is a program content copy control that lists copy_restriction_mode information of content contents descriptors for the program content currently being broadcasted and broadcasted in the future and the program content shown in FIG. 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, it may be transmitted after performing authentication such as device authentication. In this case, more secure communication can be performed. Further, requests from other than the service provider can be rejected, and the service supply range can be limited.
About the system in a present Example, about parts other than the above, it is the same as that of a 3rd Example.
<Transmitter>
The transmission apparatus in this embodiment is the same as that in the third embodiment.
<Copy control information>
The copy control information in this embodiment is the same as that in the third embodiment.
<Receiving device>
The receiving apparatus according to this embodiment is the same as that of the third embodiment, but may be configured as shown in FIG.

FIG. 23 is almost the same as the recording / reproducing apparatus shown in FIG. 10 except that the 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 and receives data via a network such as the Internet. Reference numeral 142 denotes a network transmission / reception unit that performs analysis and protocol processing of data transmitted / received by a network transmission / reception terminal. Reference numeral 142 is controlled by the control unit 111 connected by the system bus. When data is transmitted, the data is transmitted from the network transmission / reception terminal 141. The data received from the network transmission / reception terminal 141 is subjected to protocol processing, and then the copy control information is sent to the recording control unit 104. Enter.
<Program display, program details, program search screen display processing>
Most of the screen display processing of the program table, program details, and program search of the receiving apparatus in this embodiment is the same as that of the third embodiment. Hereinafter, a different part from Example 3 is demonstrated.

  In the third embodiment, the program content copy control table shown in FIG. 21 is multiplexed with a broadcast wave and transmitted. In the present embodiment, the program content copy control table is transmitted via a network. Specifically, the program contents that are currently being broadcast on the transmitting side such as a broadcasting station, and the program contents to be broadcast and the copy_restriction_mode information of the content usage descriptor for the program contents, or the copy control information corresponding to the program contents are listed in a list. A content copy control table is prepared in the server 4 so that it can be transmitted via the network at any time. On the receiver side, the same processing as in the third embodiment is performed for the broadcast wave. Further, a request instruction for the program content copy control table is requested to the server 4 via the network, and if the server side is necessary, an authentication process such as device authentication is performed to obtain 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 SI information is acquired 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 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 (copy generation management information and copying is possible) Number information) is included in the electronic program guide. The determination may be made not by the content ID but by the program name.

  As a result, even if the SI information does not include copy_restriction_mode information in the content usage descriptor or one-to-one copy control information, copy control information for each program without multiplexing special information on the broadcast wave. Thus, the copy control information can be displayed on the electronic program guide, and the user can select the program to be reserved for recording based on the copy control information, thereby improving user convenience.

  The program details and the program search screen display may be the same as the copy control information determination process shown in the electronic program guide display process, and the other processes are the same as those in the third embodiment. .

  In this embodiment, the SI information in the first embodiment does not include the copy_restriction_mode information of the content usage descriptor or the copy control information corresponding to the content usage descriptor. It is carried out based on another criterion. The system, transmission device, and copy control information in this embodiment are the same as those in the first embodiment.

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

  The receiving apparatus in the present embodiment is substantially the same as that in the first embodiment, but includes a plurality of input terminals 101 and receiving sections 102 in FIG. Here, for the sake of simplicity, it is assumed that there are two input terminals and two reception units, and FIG. 24 shows a configuration example of the recording / reproducing apparatus 150 having two input terminals and two reception units with respect to 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, the digital data received from the input terminal 101 or the input terminal 151 is subjected to frequency conversion, modulation operation, error correction, etc., and the multiplexed bit stream in one transponder is separated into packets such as video and audio. The video / audio information processing unit 103 processes the video / audio separated by the reception unit 102 or the reception unit 152. Similarly, the copy control information separated by the receiving unit 102 or the receiving unit 152 is processed by the recording / playback control unit 104. The contents of the processing are the same as in the first embodiment.

Next, screen display processing for program guide, program details, and program search will be described.
Most of the screen display processing of the program guide, 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 / playback device 150 as a receiving device is processed by the receiving unit 102 and the video / audio information processing unit 103, the 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 by the input terminal 151, and the content ID (for example, event_id of MPEG-2 TS) uniquely identifying the copy control information and the program content included in the PSI information of the program 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 in 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, and the program name may be included in the list, or only the program name may be used instead of the content ID. The program content copy control table is preferably recorded in the tamper-resistant area of the recording medium 105 and the removable recording medium 115. After the copy control information of the program is added to the program content copy control table, it is tuned to another channel 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 a remote control or uses the operation unit 110 to display an 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 the electronic program guide on the screen. At this time, when the program content copy control table recorded on the recording medium 105 or the removable recording medium 115 includes copy control information of the content ID, the copy control information (copy generation management information and copyable number information) ) In the electronic program guide. The determination may be made not by the content ID but by the program name.

  As a result, even if the SI information does not contain copy_restriction_mode information in the content usage descriptor or one-to-one copy control information, programs that are broadcast regularly such as weekly or daily (for example, news programs or continuous dramas) Etc.) or copy control information such as a program broadcast once in the past. Further, it is not necessary 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 on the electronic program guide, and the user can select a program to be reserved for recording based on the copy control information, thereby improving user convenience.

  The program details and the program search screen display may be equivalent to the copy control information determination process shown in the electronic program guide display process, and the other processes are the same as those in the first embodiment. .

  The present embodiment is an embodiment in which the program content copy control table acquired by each means in the third to fifth embodiments is used for recording / playback control in another recording / playback apparatus. The system, transmission device, copy control information, and reception device in this embodiment are the same as those in the third, fourth, and fifth embodiments, respectively.

  The screen display processing for program guide, program details, and program search in the sixth embodiment of the present invention will be described below.

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

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

  A detachable recording medium 115 storing this program content copy control table is loaded in the slot 114 of the recording / reproducing apparatus which is the receiving apparatus in this embodiment. The recording / reproducing apparatus in the present 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 the electronic program guide on the screen. At this time, if the program content copy control table recorded on the removable recording medium 115 includes copy control information of the content ID, the copy control information (copy generation management information and copyable number information) is stored in the electronic program. Include in table. The determination may be made not by the content ID but by the program name.

As a result, when the SI information does not include copy_restriction_mode information of the content usage descriptor or information regarding copy control corresponding to the content usage descriptor, the program content copy control table multiplexed on the broadcast wave is processed in the recording / reproducing apparatus. When there is no function (Example 3), or when the recording / playback apparatus does not have a function (Example 4) for processing a program content copy control table via a network, or program contents using a plurality of input terminals and receiving units Even when there is no function (Example 5) for generating and processing a copy control table, it is possible to grasp copy control information for each program.
As a result, the copy control information can be displayed on the electronic program guide, and the user can select a program to be reserved for recording based on the copy control information, thereby improving user convenience.

  The program details and the program search screen display may be equivalent to the copy control information determination process shown in the electronic program guide display process, and the other processes are the same as those in the first embodiment. .

  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 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 / playback 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 system Section 209 ... decoding unit 114 ... slot 115 ... removable recording medium 116 ... switch

Claims (2)

In a digital content transmission / reception system that transmits digital content from a transmission device and receives the digital content in a reception device,
The transmitter is
A content generation unit for generating the digital content;
The first copy control information used at the time of recording reservation of the digital content and the information used at the time of recording the digital content, the state showing that at least one generation copy of the digital content can be made Copy control indicating whether or not the digital content is a predetermined number of copy-limited content of a predetermined number of two or more when the second copy control information and the second copy control information are one-generation copyable A management information generation unit capable of generating mode information;
Transmitting the digital content generated by the content generation unit and the first copy control information, the second copy control information, and the copy control mode information generated by the management information generation unit, or Transmission that transmits the digital content generated by the content generation unit, the first copy control information and the second copy control information generated by the management information generation unit without accompanying the copy control mode information With
The receiving device is:
A first recording medium that is a recording medium corresponding to the recording of the digital content based on the copy control mode information;
A reservation unit for making a reservation for recording the digital content in the first recording medium;
A receiving unit for receiving the transmitted digital content;
A recording unit for recording 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 reservation is made to record the digital content on the first recording medium using the first copy control information;
The received digital content when the second copy control information indicates that one generation copy is possible and the copy control mode information indicates that the received digital content is content that can be copied with a limited number of copies. A second state in which 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 capable of one-generation copying 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 so that the number of digital copies that can be generated from the recorded digital content is within the predetermined number;
A digital content transmission / reception system characterized by that. In a digital content transmission / reception method for transmitting digital content from a transmission device and receiving the digital content in a reception device,
In the transmitter,
A content generation step of generating the digital content;
The generated digital content, first copy control information used when recording the digital content is recorded, and information used when recording the digital content, and at least one generation copy of the digital content is allowed. The second copy control information having a state indicating that the digital content is one-generation copyable when the second copy control information is one-generation copyable, and the digital content is a predetermined number of copy-capable content of a predetermined number of two or more. A management information generating step for generating copy control mode information indicating whether or not;
The generated digital content, the first copy control information, the second copy control information, and the copy control mode information are transmitted, or the generated digital content and the first copy control information are transmitted. Transmitting the second copy control information without accompanying the copy control mode information,
In the receiving device,
A reservation step for making a reservation for recording the digital content on a first recording medium corresponding to the recording of the digital content based on the copy control mode information;
Receiving the transmitted digital content; and
Recording the received digital content on the first recording medium,
The reservation step includes
Using the first copy control information, there is a first state for making a reservation for recording the digital content on the first recording medium;
In the recording step,
The received digital content when the second copy control information indicates that one generation copy is possible and the copy control mode information indicates that the received digital content is content that can be copied with a limited number of copies. A second state in which 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 capable of one-generation copying 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 so that the number of digital copies that can be generated from the recorded digital content is within the predetermined number;
A digital content transmission / reception method characterized by comprising:

Images