CN101640051A - Copy control method - Google Patents
Copy control method Download PDFInfo
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- CN101640051A CN101640051A CN200910118348.XA CN200910118348A CN101640051A CN 101640051 A CN101640051 A CN 101640051A CN 200910118348 A CN200910118348 A CN 200910118348A CN 101640051 A CN101640051 A CN 101640051A
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- copy
- recording medium
- information
- digital content
- copy control
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
- G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
- G11B20/00753—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
- G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
- G11B20/00753—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
- G11B20/0076—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein the copy frequency, i.e. the number of copies in a given time period, is limited
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Multimedia (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Storage Device Security (AREA)
Abstract
The invention provides a copy control method of a receiver, which allows the digital playing program of the Copy One Generation, implements the copy control and improves the using state. In a reception apparatus for receiving digital content and a plurality of types of copy control information for controlling copying of the digital content, and recording the digital content on a recording medium according to the plurality of types of copy control information, when first information in the received plurality of types of copy control information shows copy generation information permitting one-generation copying, the digital content is allowed to be recorded in a state of being copyable up to a limited number in the case where second information in the received plurality of types of copy control information shows limited-number copy permission, and the digital content is recorded only once in a copy prohibited state in the case where the second information does not show limited-number copy permission.
Description
Technical field
The present invention relates to the copy control of content.
Background technology
About above-mentioned technical field, in patent documentation 1, with " raising will allow only to copy the information (Copy One Generation) of a generation to be rewritten as to forbid the information (Copy NoMore) of further copy and behaviour in service when writing down " will be problem, put down in writing following content as its solution, that is: in the schedule time behind record, permit only copying a generation (Copy OneGeneration), the part that the record that incomplete grade causes when compensating owing to record interrupts.Record two identical data stream (stream) on medium, one is used for common audiovisual, and another is transferred to other medium as required and preserves.
In recent years, along with the pen recorder that can write down digital broadcast has been popularized in the expansion of digital broadcast service.
When the record digital broadcast, be built in the digital broadcast that the last recorder of the HDD of pen recorder (hard disk drive) is arrived, when the program that can play from HDD toward other recording medium (for example CD, semiconductor memory, other HDD) copy digital, copy, when the program of digital broadcast allows a record generation, (mean and do not allow the copy (copies more than two generations) that copies, Copy One Generation) and move.
In the pen recorder of patent documentation 1, the program of above-mentioned digital broadcast is under the situation of a copy generation (Copy One Generation), as long as just can copy with interior at the fixed time, so can compensate when record interrupts.
But, in the pen recorder of patent document 1, if surpassed the schedule time then the same copy that do not allow with existing technology.For example consider following situation: the pen recorder that these two actions that copy CD toward the HDD program recording with from HDD to can not be carried out simultaneously, when wishing the more and central access HDD of recorded program, the copy that does not have to finish from HDD to the CD has but surpassed the schedule time.
Summary of the invention
Therefore, while the invention provides a kind of device or method that control realizes improving behaviour in service of when the program of record digital broadcast, implementing to copy.
Particularly, for example, a kind of copy control method of receiving trap, this receiving trap receiving digital contents and the multiple copy control information that the copy of this digital content is controlled, according to described copy control information described digital content is recorded in first recording medium and second recording medium, in described copy control method, the copy of representing to allow to copy a generation when the first information in the described copy control information that receives is from generation to generation during information, under the situation that limited to the number that second information representation in the described copy control information that receives allows copy first to copy number copies, can with the state that can copy in described first recording medium described digital content of record management till the second copy number, can with the state that can copy in described second recording medium described digital content of record management till the 3rd copy number, control make described second the copy number and described the 3rd the copy number and be no more than described first the copy number, under the output pathway during to first recording medium and the different situation of the output pathway during to second recording medium with described digital contents copy with described digital contents copy, the copy control that further has nothing in common with each other.
According to said method, under the situation of record digital broadcast program, can improve the behaviour in service of recorded content when implementing copy control.
Description of drawings
Fig. 1 is the block diagram that the system architecture example is shown.
Fig. 2 is the block diagram that the structure example of dispensing device 1 is shown.
Fig. 3 is that copy a kind of of control information is the example that content is utilized the structure of descriptor.
Fig. 4 records the example that content is utilized each field of descriptor.
Fig. 5 is that a kind of of copy control information is the example of the structure of digital copies control descriptor.
Fig. 6 is the example of control copy information from generation to generation.
Fig. 7 utilizes each field of descriptor to receive the example of processing to the content of sending from dispensing device 1 in the receiving trap 3.
Fig. 8 is that dispensing device 1 utilizes the copy control information to protect the application examples of programme content.
Fig. 9 is the control example that receiving trap 3 utilizes the copy control information to store (record) programme content.
Figure 10 is the block diagram that the structure example of receiving trap 3 is shown.
Figure 11 is the figure that the example of the transmission bag that has added timestamp is shown.
Figure 12 is the figure that is illustrated in the example that has write down programme content on the recording medium.
Figure 13 is the process flow diagram of example of the generation step of copy information that management information when record allows the programme content of a copy generation is shown, copy number.
Figure 14 is the process flow diagram of example that the step of copy program content is shown.
Figure 15 is the process flow diagram that the step of mobile programme content is shown.
Figure 16 is the example that the recording medium that can manage a plurality of copies is shown.
Figure 17 is the process flow diagram that is illustrated in copy information with the example of the generation step of copy number of management information when writing down the programme content that allows a copy generation.
Figure 18 is the figure that is used to understand the restriction that copies number.
Figure 19 is used for understanding the replacement output destination of the content of storing in " can limit number copies " mode and the figure of copy control thereof.
Label declaration
10, receiving record recapiulation; 101, tuning lsb decoder; 102, selector switch; 103, separated/extracted portion; 104, input buffer portion; 105, lsb decoder; 106, network interface portion; 107, buffer management portion; 108, clock recapiulation; 109, timestamp comparison/efferent; 110, timestamp appendix; 111, reading part; 112, write section; 113, built-in recording medium; 114, control part; 115, user interface part; 116, efferent; 117, fixed clock generating unit; 118, removable recording medium; 119, contents management information generating unit; 120, contents management information analysis unit; 121, pen recorder.
Embodiment
Below, the example (embodiment) of preferred implementation of the present invention is described.But, the invention is not restricted to present embodiment.Present embodiment relates generally to allowing the information processing of a copy generation.
＜system 〉
Fig. 1 is the block diagram that the system architecture example of present embodiment is shown.Example by playing information is received and dispatched and the situation of record-playback.
1 is arranged on the dispensing device that information such as playing the radio station provides the station, and 2 are arranged on relay station or send relay with satellite etc., and what be arranged on that the user waits within doors 3 is receiving traps, and the 10th, be built in the receiving record recapiulation of receiving trap 3.In receiving record recapiulation 10, can the information of having play be write down and reproduce.
Dispensing device 1 transmits signal wave after modulated via relay 2.Except satellite transmission as shown in the figure, can also use the transmission that cable for example transmits, telephone wire transmits, ground wave is play and carry out and utilize via the transmission of the IP (InternetProtocol) of networks such as internet etc.As described later, this signal wave that is received by receiving trap 3 becomes the signal that is suitable for writing down as required and is recorded after being demodulated to information signal.In addition, the user can be built-in with under the situation of display video-audio by this display audio-visual information signal indication at receiving trap 3, next in not built-in situation by connecting the video-audio that receiving trap 3 and not shown display come the audio-visual information signal indication
＜dispensing device 〉
Fig. 2 is the block diagram that the structure example of dispensing device 1 in the system of Fig. 1 is shown.
The 11st, the source generating unit, the 12nd, with MPEG or the encoding section that H.264 waits mode to compress, the 13rd, scrambled portion (scramble), the 14th, modulation portion, the 15th, transmitting antenna, the 16th, management information appendix.Information such as video-audio at the source generating unit 11 that is made of camera, record reproducing device etc. is produced transmit in order to utilize few band occupancy of trying one's best, and are come the compression of implementation data amount by encoding section 12.Encrypt by 13 pairs of transmission of scrambled portion as required, make that the hearer that looks of appointment can audiovisual.Be modulated into by modulation portion 14 and be suitable for the signal that OFDM, TC8PSK, QPSK etc. transmit, send as electric wave to relay 2 from transmitting antenna 15 afterwards.At this moment, the additional information that is used to control copy promptly copies information such as control information and current time in management information appendix 16.
In addition, often utilize methods such as timesharing, SPECTRAL DIFFUSION that an electric wave is multiplexed into a plurality of information.Be not documented among Fig. 2 for easy, but in this case, have the system of multiple source generating unit 11 and encoding section 12, between encoding section 12 and scrambled portion 13, be mounted with the multiplexed portion of multiplexing a plurality of information.
＜copy control information 〉
The copy control information is the information that control could copy and copy restrictions such as number of times, and is for example additional by management information appendix 16.Comprise that content utilizes descriptor and digital copies control descriptor etc.
Fig. 8 shows the application examples of utilizing the copy control information to protect programme content.
" can use " expression at the content corresponding with each method of service, transmitter side can be selected as the generation control of using the digital copies control information.For example, if " charge program (pay perview) " then expression can use any digital copies control information, on the other hand, if charges such as " play " monthly payments represents that then transmitter side can not select " forbidding copying ".
" state monopoly for marketing/distribution " is meant that gathering the signatory mode of a plurality of channels for charge broadcast etc. is called the state monopoly for marketing contract, and the mode signatory according to each channel is called the distribution contract.
" beyond above-mentioned " for example comprises the situation of " not being the program that content protecting was play, do not had in charge ".
Fig. 3 be illustrate the copy a kind of of control information be the example that content is utilized the structure of descriptor.It for example is to be generated by management information appendix 16 that content is utilized descriptor, additional, the PSI (Program Specific Information) that is stored in MPEG-TS (has PMT (Program Map Table: page map table) etc.) or SI (Service Information: information on services) (as example EIT (Event Information Table: Event Information Table) or among the SDT (Service Description Table: the service describing table)) etc. and the information that sends is arranged as example.
It is to be configured (sending) when related-program being recorded and narrated about the storage (record) or the control information of exporting that content is utilized the purposes of descriptor.When its declaration of will is " 1 " when 1 bit field of digital_recording_control_mode (digital copies pattern position), though the digital_recording_control_data of digital copies control descriptor illustrated in fig. 5 is " can copy a generation ", still can be recorded as " copying can limit number ".When being " 0 ", can not be recorded as " can limit number copies ".
In addition, when related-program is the object of output protection, must disposes (sending) content and utilize descriptor.This output protection means, uses content to utilize the output protection position (encryption_mode) of descriptor that protection is implemented in the high speed digital interface output of the content of " can need not restriction condition copies ".In other words, exporting by digital interface and when recording medium copies, encrypting, but to the number of times of copy and the system of not limiting from generation to generation.In fact can not send once more to network.Also can be described as " have the copy of output protection/free " or EPN (encryption plus non-assertion).
And, when the digital copies control information of related-program for " can copy a generation " and when not being the object of " can limit number copies ", must be configured (sending).
Fig. 4 illustrates the example of record content that content is utilized each field of descriptor.
In " descriptor_tag ", record and narrate the expression content and utilize " 0xDE " of descriptor.In " descriptor_length ", record and narrate the identifier length that content is utilized descriptor.In " digital_recording_control_mode ", record and narrate " 0 " for " can copy a generation " and when not being the object of " can limit number copies " in the digital copies control information.Record and narrate for " can copy a generation " and when being the object of " can limit number copies " when the digital copies control information and to be " 1 "
In " encryption_mode ", when the digital copies control information is protected for " can need not restriction condition copies " and to high speed digital interface output enforcement, record and narrate " 0 ".
" retention_mode " means interim control bit storage, record and narrate " 0 ", " 0 " is even expression is also can store in " forbidding copy " time when " digital_recording_control_data " (digital copies control information) of digital copies control descriptor temporarily." retention_state " means that interim storage allows the time, records and narrates " 111 ", should " 111 " expression can store 1 hour 30 minutes.In addition, the default setting of " image_constraint_token ", " retention_state " and " encryption_mode " is " 1 ".
The copy number quantitative limitation of the content of " can limit number copies " is to comprise copy source and copy destination and copy sum and be limited in 10.And, when existence records the writing function of removable recording medium and during via the locomotive function of high speed digital interface output, comprise above-mentioned functions and limit.Particularly, for example except analog image, voice output and digital audio output, the content of copy source and copy destination is limited number of copies respectively or forbids copy (forbidding copying again).If in above-mentioned restriction, then can move the content of copy source and copy destination.
In addition, situation about only being used for the Content Management purpose as thumbnail is not included in the copy.
For each field as the processing of receiver side aftermentioned in Fig. 7 also.
Fig. 5 is that a kind of of copy control information is shown is the example of the structure of digital copies control descriptor.Digital copies control descriptor is for example to be generated, add, be stored among the PSI (PMT etc. is arranged as example) of MPEG-TS or the SI (EIT or SDT etc. are arranged as example) and the information of sending by management information appendix 16.
Digital copies control descriptor is represented to control the information of copy from generation to generation by 2 bit fields of " digital_recording_control_data " (digital copies control information).
Fig. 6 shows the example of digital copies control information.The digital copies control information represents not have restriction condition ground to copy when " 00 ", ' represent to represent to copy a generation when " 10 " according to the definition of playing enterprise when " 01 ", when " 11 ", represent to forbid copy.In addition, but though copy a generation mean can write down received play signal (copy of the first generation) behind record reproducible (copy) play signal not.
The content of Fig. 3 and Fig. 4 utilizes descriptor to can be described as copy number restricted information, and the digital copies control information of Fig. 5 and Fig. 6 can be described as copy generation limit information.
＜receiving trap 〉
Figure 10 is the figure that the structure example of receiving trap 3 in the system of Fig. 1 is shown.In Figure 10, the place that the lines that flow to for expression information, PCR etc. intersect is made as and does not contact.But, for the part of having added stain, there is contact, expression is from beginning difference here.
Receiving trap 3 is the receiving traps that receive digital broadcast or write down and reproduce via IP (Internet Protocol) broadcast of network.The situation that explanation is handled following signal, this signal be as Image Compression encode by MPEG (Moving Picture Experts Group) mode and utilize the MPEG2-TS mode multiplexing after signal.
Receiving trap 3 comprises receiving record recapiulation 10, control part 114 (for example CPU (CentralProcessing Unit: central processing unit)), user interface part 115 keyboard, mouse or the telepilot etc. of input media (for example as).
This structure example is recited as hardware elements with each several part, but wherein a part also can realize with software.Also can be applicable to following situation, promptly to via designated users such as the VOD (Video OnDemand) of network and download transmitting-receiving presentation content and sound-content etc.
Receiving record recapiulation 10 comprises tuning lsb decoder 101, selector switch 102, separated/extracted portion 103 (for example demultplexer), input buffer 104, lsb decoder 105 (for example mpeg decode), network interface portion 106, buffer management portion 107, clock recapiulation 108, timestamp comparison/efferent 109, timestamp appendix 110, reading part 111, write section 112, built-in recording medium 113, efferent 116, fixed clock generating unit 117 (for example crystal oscillator), contents management information generating unit 1119 and contents management information analysis unit 120.
Built-in recording medium 113 (being also referred to as first recording medium) and removable recording medium 118 (being also referred to as second recording medium) for example be hard disk drive (HDD) but, the medium of random access such as semiconductor memory, disk, CD, magneto-optic disk.
Efferent 116 is to utilizing CRT (Cathode Ray Tube), LCD (Liquid CrystalDisplay), the display part of PDP (Plasma DISPLAY Panel) etc., the audio output unit of loudspeaker etc., perhaps other display device etc., the combination image output terminal of the image data/voice data of output simulation or numeral, S image output terminal (S terminal), D image output terminal (D terminal) (above is the analog image lead-out terminal), HDMI (High DefinitionMultimedia Interface) lead-out terminal (digitized video lead-out terminal), optoacoustic sound lead-out terminal (digital audio lead-out terminal) etc.Efferent 116 reproduces decoded image/sound by the display part/audio output unit as output unit.Perhaps via lead-out terminal (for example HDMI) etc. to image outputs such as other display device, audio reproducing apparatus/sound-content data etc.In image/sound-content data, carry out content protecting, for based on the form of the content protecting mode of separately output specification and export from this lead-out terminal.
Separated/extracted portion 103 separated/extracted from the MPEG2-TS of input goes out via user's operating portion such as the telepilot of user interface part 115 and control part 114 and the transmission bag of channel appointed (program), and the transmission bag that separated/extracted goes out is outputed to timestamp appendix 110 and network interface portion 106.And, separated/extracted portion 103 is from via user's operating portions such as the telepilot of user interface part 115 and control part 114 and the transmission bag of channel appointed (program), separated/extracted goes out the PES (Packetized Elementary Stream) or the ES (Elementary Stream) of image and sound, outputs to input buffer 104.
ES is meant the image/sound data after each compressed/encoded.PES is meant the stream that image ES or sound ES is divided into suitable size and divides into groups.And separated/extracted portion 103 outputs to clock recapiulation 108 from the transmission bag of channel appointed (program), extracting PCR (Program Clock Reference) via user's operating portion such as the telepilot of user interface part 115 and control part 114.
Separated/extracted portion 103 is according to via user's operating portion such as the telepilot of user interface part 115 and control part 114 and the transmission bag of channel appointed (program), the title of the channel (program) that detection is write down in built-in recording medium 113 or removable recording medium 118 or beginning/time Close Date of program, copy control information from generation to generation and expression could copy a plurality of information, and the generation data key outputs to contents management information generating unit 119.The beginning of above-mentioned title or program/time Close Date, copy control information from generation to generation and expression could copy a plurality of information, for example are stored among the PSI or SI information of MPEG-TS, send from dispensing device 1.
Figure 11 is the structure example that the transmission bag that has added timestamp is shown.The transmission bag (TSP) of 188 byte lengths of MPEG specification has added the timestamp (for example, receiver receives the moment of transmitting bag) of 4 bytes up front, becomes the packets of information of 192 byte lengths.Timestamp information when in timestamp, maintaining this transmission bag arrival.The TS of MPEG specification is made of with the Payload (perhaps adaptation field) of following 184 bytes thereafter the header of foremost 4 bytes.
Contents management information generating unit (content information generating unit) 119 generates management information based on beginning/time Close Date, copy control information from generation to generation and copy number control information (expression could copy a plurality of), the key information from the title or the program of separated/extracted portion 103, outputs to write section 112.Copy control information from generation to generation and the control information of copy number can be, the content that receives Fig. 3～Fig. 6 explanation from transmitter 1 is utilized descriptor and digital copies control descriptor and directly it is used as management information, also can generate new information according to above-mentioned two kinds of information.
In addition, timestamp can refer to the relevant temporal information of time location with the transmission bag that has added this stamp.For example, can be from moment of the time point of the transmission bag of separated/extracted portion 103 or can be and transmit mistiming between the bag (as example, front or top transmission bag) to timestamp appendix 110 input as certain of benchmark.This timestamp is different from the foregoing timestamp (for example PCR or DTS or PTS) that transmits in the bag that is included in advance.
Figure 12 is the example to built-in recording medium 113 or removable recording medium 118 recorded program contents.
To represent according to each programme content programme content particular content management information and record management information areas 501 and data area 502 respectively as the data (video-audio etc.) of the entity of programme content.In management information, file sequence number 503, the expression program that for example records the title of expression programme content begin/time in period 504 of time Close Date, the address, foremost of data area and record size 505, copy information 507, copy number 508, key information 506 etc.Address from being correlated with in the address, foremost 505 that is recorded in management information areas 501 writes data area 502 with programme content.When recorded program content again, log file sequence number 1, file sequence number 2...... file sequence number n and management information and programme content one by one.
Copy information 507 is included in the copy control information from generation to generation in the management information that is generated by contents management information generating unit 119, for example considers to utilize the signal of 2 bits, is appointed as
00=can copy (Copy Free)
10=allows a copy generation (Copy One Generation)
11=forbids copy (Copy Never)
In this case, at the programme content that in receiving trap 3, writes down, will copy content-defined one-tenth once in the mode of 01=Copy One Generation and can not further copy (No More Copies) in " Copy One Generation " mode.As appointed method, can use the identical information of digital copies control information that illustrates with Fig. 6, also can utilization alone in receiving trap 3.
Copy number 508 is the copy number control informations that management information comprised that generated by contents management information generating unit 119.Copy number 508 is based on that copy control information from generation to generation that contents management information generating unit 119 receives from separated/extracted portion 103 and expression could copy a plurality of information and the information that generates.When copy control information from generation to generation allow a record generation (Copy OneGeneration) and expression could copy a plurality of information for " can " time, programme content is recorded as " No More Copies ", on identical or different recording medium, be used to be provided with the information that the expression copy that can copy allows number with identical or different form storage, for example the input expression allows " 9 " of 9 in copy.This numerical value can be according to specification etc. as benchmark.On the other hand, when copy control information from generation to generation allows a record generation (Copy One Generation) and represents that could copy a plurality of information is "No", programme content is recorded as " No More Copies ", and input " 0 " (expression do not allow copy the meaning) is used to be provided with the information of the copy permission number that can not copy as expression.
In addition, be recorded as the data of entity of the programme content of " No MoreCopies " as programme content, promptly do not change among the PSI that is stored in MPEG-TS or the SI and could copy a plurality of information from copy control information from generation to generation and expression that dispensing device 1 is sent with " Copy One Generation ".
And, for example encrypt and make and to prevent that copy information 507, copy number 508 and key information 506 from illegally being distorted.
Turn back to the explanation of Figure 10, contents management information analysis unit 120 reads the management information that is stored in built-in recording medium 113 or the removable recording medium 118 via reading part 111, resolve the content of this management information, when reproduce being stored in programme content in built-in recording medium 113 or the removable recording medium 118, copy or when mobile, can select programme content via user's operating portions such as the telepilot of user interface part 115 and control part 114.To beginning/time Close Date of the title of control part 114 transmission programme contents or program, copy information, copy number etc.And, be used for the key information that enciphered data is decoded to reading part 111 transmission.
Reading part 111 is via buffer management portion 107 or control part 114 and Be Controlled, read management information from built-in recording medium 113 or removable recording medium 118, output to contents management information analysis unit 120, from built-in recording medium 113 or removable recording medium 118 reading encrypted data successively, based on key information, code data has been applied the transmission bag that has added timestamp after the decoding processing to 109 outputs of timestamp comparison/efferent from contents management information analysis unit 120.
Timestamp comparison/efferent 109 will with fixed clock recapiulations such as crystal oscillator 117 serve as the counter of basis operation count value, compare with the timestamp that has added the transmission bag of the timestamp that reads out by reading part 111, when both are consistent, from transmitting bag deletion (removing) timestamp, output to selector switch 102 and network interface portion 106.In addition, when monitoring the surplus of input buffer 104 by buffer management portion 107 as mentioned above and during according to this surplus control reading part 111, can not compare Counter Value and timestamp and, output to selector switch 102 and network interface portion 106 from transmitting bag deletion timestamp.Particularly when the reproduction except common reproduction (1 times of speed is reproduced), preferably utilize this method to export.
＜with copy control information relevant reception and recording processing
The detailed example of the processing of the receiving trap 3 relevant with copy control information 1 that send from dispensing device, explanation Fig. 3～6 is described.
Fig. 7 is an example of utilizing each field of descriptor to handle to content in the receiving trap 3.
When " descriptor_tag " is " 0xDE ", judge that this descriptor is that content is utilized descriptor.Utilize the descriptor length of descriptor according to " descriptor_length " judgement content.If " digital_recording_control_mode " is " 1 ", then when the digital copies control information was " can copy a generation ", being judged as was the object of " can limit number copies ".If " digital_recording_control_mode " is " 0 ", then when the digital copies control information is " can copy a generation ", be judged as the object that is not " can limit number copies ".For " image_constraint_token ", no matter any value of input all is judged as the resolution that does not limit signal of video signal output.For " retention_mode ", no matter any value of input all is judged as and can stores temporarily.For " retention_state ", it is 1 hour 30 minutes no matter any value of input all is judged as the interim storage permission time.If " encryption_mode " is " 1 ", then when the digital copies control information when " can need not restriction condition copies ", be judged as to high speed digital interface output and do not implement protection.If " encryption_mode " is " 0 ", then when the digital copies control information is " can need not restriction condition copies ", be judged as high speed digital interface output enforcement protection.
In addition, when because any former thereby be unworthy of putting (sending) when content is utilized descriptor, can be construed to each field is following numerical value.digital_recording_control_mode＝“1”，image_constraint_token＝“1”，retention_mode＝“0”，retention_state＝“111”，encryption_mode＝“1”。
Fig. 9 illustrates the control example that receiving trap 3 utilizes copy control information storage (record) programme content.
Content shown in Figure 9, for example when store program content, under the situation of digital copies control descriptor " digital_recording_control_data " for ' 10 ' expressions " can copy a generation ", the copy control information on the recording medium is stored as " forbidding copying " again.But, be under ' 1 ' the situation, to be stored as " can limit number copies " at " digital_recording_control_mode ".In addition, when storing, also can change the value of " digital_recording_control_data " of digital copies control descriptor in the mode of " forbidding copying again ".
And, under the situation of digital copies control descriptor " digital_recording_control_data ", can not generate a plurality of copies for ' 10 ' expressions " can copy a generation ".But, except the storage that to be purpose with the backup carry out toward the zone that the user can not visit.And above-mentioned restriction distributes according to each acceptance division of playing, when the acceptance division of playing exists when a plurality of, distributes above-mentioned restriction according to each acceptance division of a broadcast.
Copy for limiting number, can generate N copy according to the programme content that is stored as " can limit number copies ".The value of N for example can be according to specification as benchmark.Generating via high speed digital interface output under the situation of copy, when the number of copies that generates can be determined, can copy by using locomotive function etc.For example, can recognition interface be that IEEE1394 and output destination are the situations of the device corresponding with the DTPC specification.In addition, the copy of the generation state that is made as " forbidding copying again " or is equal to it.
When the programme content that is stored as " can limit number copies " being reproduced output, in high speed digital interface, execution is exported by the processing of the No More Copies of DTCP (Digital Transmission ContentProtection) regulation.For analog image output and digital audio output, may be output as " can copy a generation ".
Being restricted to of the number of copies of the content of " can limit number copies " comprises copy source and copy destination and copies sum and be limited in 10.And,, comprise these functions and limit when existing toward the writing function of removable recording medium and during via the locomotive function of high speed digital interface output.Particularly, the source that for example copies is limited number of copies and forbids copy (forbidding copying again) except analog image, voice output and digital audio output respectively with the content that copies the destination.If in above-mentioned restriction, then can move the content of copy source and copy destination.
About the content of storage (record) for " can limit number copies ", toward the digital recording (copy) of recording medium and the copy of exporting via high speed digital interface, except the original content of record (storage), can also generate 9 copies of as many as.But, except the record (storage) that to be purpose with the backup carry out toward the zone that the user can not visit of when record and record back.Identical can the moving of content of original content and " forbidding copying again " behind the copy that has generated specified quantity (9).
And, can under the state that on the recording medium built-in or that connected by numeral the number of copies that is managed for the content of " can limit number copies " by management is remained unchanged, move, but in these cases, make to move before and move after the total number of copies constant.
Toward the content of built-in recording medium copy " can limit number copies " with via the management of number of copies in the copy of high speed digital interface, with removable content be 10 situation equivalence.And, for analog image output and digital audio output, can export in the mode of " copying a generation only ", be not included in the copy number quantitative limitation.
For record toward removable recording medium, if can manage and the same number of copies of above-mentioned explanation, then can be with " can limit number copies " state recording content.But, when content being recorded simultaneously removable recording medium and storage medium or a plurality of removable recording medium, carry out Sharing Management and make the sum of the number of copies that each allowed of a plurality of above-mentioned removable recording mediums and storage medium be no more than the sum that each acceptance division allowed of a broadcast.
Keep moving under the state of number of copies of content of " can limit number copies " and be meant, move the whole of the number of copies of managing or it is a part of by moving source.In this case, make that the number of copies of mobile preceding and mobile back total is constant.Particularly, but the number of copies of content is m before moving, and when having moved n wherein, but the number of copies of the content of moving source is (m-n), but the number of copies of the content of mobile destination is (n-1).
In addition, situation about only being used for the Content Management purpose as thumbnail is not included in the copy.Situation about being used for the Content Management purpose for example can also be a situation of utilizing acoustic information except the thumbnail that generates according to image information, utilizes the situation of caption information.
Figure 18 is the figure that is used to understand by the copy number quantitative limitation of above-mentioned explanation, and receiving trap 3, network interface portion 106, built-in recording medium 113, removable recording medium 118, pen recorder 121 and pen recorder 122 are arranged.Pen recorder 121 for example is connected with network interface portion 106 via IEEE1394, utilizes DTCP as the copyright protection mode.Pen recorder 122 for example is connected with network interface portion 106 via wired lan or WLAN, utilizes DTCP-IP (Digital Transmission Content Protection over Internet Protocol) as the copyright protection mode.For example under situation about connecting like this, must be in 10 from the sum of content built-in recording medium 113, removable recording medium 118, pen recorder 121 and pen recorder 122 of playing " can limit number copies " that ripple receives.
In this case, the content of the state that can copy 4 is for example arranged in built-in recording medium 113, the content of the state that can copy 2 is arranged, 1 content is arranged in pen recorder 121,1 content is arranged in pen recorder 122 at removable recording medium 118.When writing down receiving the broadcast ripple, can carry out record to built-in recording medium 113, removable recording medium 118, pen recorder 121 and pen recorder 122 simultaneously, and record above-mentioned number, can also only be recorded at first in the built-in recording medium 113, record removable recording medium 118, pen recorder 121 and pen recorder 122 afterwards again.
Figure 19 is used to understand by the replacement output destination of the content of storing in " can limit number copies " mode of above-mentioned explanation and the figure of copy control thereof.As output source for example is the built-in recording medium 113 of receiving record recapiulation 10, the analog image output of efferent 116 (combination image output terminal, S terminal, D terminal etc.) is used CGMS-A (Copy Generation Management System-Analog) and Macro vision as copy control, the control of CGMS-A is made as and copies a generation only, and the value of APS (Analog Protection System) is inherited in the control of Macro vision.Digital audio output (optoacoustic electricity lead-out terminal etc.) uses SCMS (Serial Copy Management System) as copy control, and its control is made as and copies a generation only.And, the high speed digital interface of network interface portion 106 (IEEE1394 terminal etc.) uses DTCP (Digital Transmission Content Protection) as copy control, if this control is made as No More copies when reproducing, if be made as Move during copy.In removable recording medium 118, the copy control of forbidding copying again by the record destination.
By implementing suitable copy control according to different output destinations like this; thereby can on a plurality of recording mediums or pen recorder, write down a plurality of same program in the time of can writing down receiving the broadcast ripple, have the effect that can when improving user convenience, realize content protecting.
In addition, above-mentioned pen recorder 121, pen recorder 122 ways of connecting via IEEE1394, LAN respectively has been described, but to be not limited to must be IEEE1394 or LAN, can also connect by other method of attachment.
When recording medium is removable recording medium, except also there is other restriction in Fig. 9.For the programme content digital recording is arrived removable recording medium, in the digital recording of the digital recording of TV, data, services or voice service, when " digital_recording_control_data " to digital copies control descriptor represents that for ' 10 ' programme content of " can copy a generation " receives and writes down, even (for example do not allow to copy more than 3 for the content first generation that receives yet, when writing down, can not be recorded in simultaneously in the recording medium more than 3) receiving broadcast.This value (being exemplified as more than 3) can be according to specification as benchmark.And the copy of the generation that record format is identical can not generate a plurality of.But, except the storage that to be purpose with the backup carry out toward the zone that the user can not visit.And, distribute according to each acceptance division of playing to the restriction of the record of digital recording medium, when the acceptance division of playing exists when a plurality of, distribute above-mentioned restriction according to each acceptance division of above-mentioned broadcast.When receiving trap has been installed with the not corresponding recording mode of digital_recording_control_mode, for " copy_control_type " of digital copies control descriptor be ' 01 ', digital_recording_control_data is ' 10 ' programme content, utilizes descriptor digital_recording_control_mode irrespectively to carry out digital recording in " can copy a generation " mode with content.
Figure 13 is the example of the generation step of the copy information that is illustrated in the receiving trap 3 management information when record allows the programme content of a copy generation (Copy OneGeneration), copy number.
Contents management information generating unit 119 could copy a plurality of information according to copy control information from generation to generation and the expression from separated/extracted portion 103, when recognizing when having added expression and could copy the programme content of a plurality of information in the mode of " allow copy a generation (CopyOne Generation) ", input " 01 " promptly forbids copying (No More Copies) (SA01) as not copying later on again again in the copy information of management information.
Be built-in or mobile (SA02) to the recording medium of contents management information generating unit 119 Notification Record programme contents for example from control part 114.
When being removable, for example input " 0 " in the copy number of management information becomes that programme content can not copy and state (SA04) movably.In addition, with aforesaid not allow the relation of the application of the copy more than 3 be following difference: above-mentioned is for example to play and the copy control of (when generating the copy of the first generation) when writing down receiving, relative therewith, the explanation of Figure 13 is the copy of (after the copy that has generated the first generation) control after the record in recording medium.
When being built-in, contents management information generating unit 119 judge expression could copy a plurality of information be " can " or "No" (SA03).
When "No", for example input " 0 " in the copy number of management information becomes that programme content can not copy and state (SA04) movably.Certainly can also delete.
When " can " time, input " N " in the copy number of management information becomes the state (SA05) that programme content can copy N.
By as mentioned above, make the programme content of the permission copy generation (Copy OneGeneration) behind the record irrespectively to copy a plurality ofly with the time, have the effect that improves behaviour in service.And, by recording medium is built-in or mobile judging could copy a plurality of, thereby when built-in, local password is set in programme content as mentioned above, and key information, copy information, copy number program are provided with password and manage, thereby can prevent illegal rewriting in management information inside.On the other hand, when removable, consider various management methods, because there is the content that can not manage under the aforesaid built-in situation, consideration can not prevent illegal situation of rewriting.Thus, while have and to improve the effect that user convenience realizes content protecting.
＜with copy control information relevant copy process
Figure 14 is the process flow diagram that illustrates by the example of the step of receiving trap 3 copy program contents.
When the copy information to management information is that " 01 " (No More Copies), copy number are the programme content of " N " (N ≠ 0) when copying, monitor whether this copy process finishes (SB01).
When finishing, in the copy number of the management information that copies the source record medium, import " N-1 " (N ≠ 0) and become the state that programme content can copy N-1, input " 01 " (No More Copies) in the copy information of the management information of copy destination recording medium and becoming forbids the state that copies again, input " 0 " in the copy number of management information and become that programme content can not copy but state (SB04) movably.
When not finishing, monitor whether copy process interrupts (SB02).
When not interrupting, monitor whether copy process finishes (SB01).
When interrupting, input " N-1 " (N ≠ 0) in the copy number of the management information of copy source record medium and become the state that programme content can copy N-1 is deleted the programme content (SB03) that copies midway when a plurality of when the recording medium of copy destination can write down.But, when the recording medium that can only write down once, so owing to can not delete and do not carry out deletion and handle.
So, the effect that has the copy generational management of the programme content that can reliably must carry out the copy destination.And, even because any former thereby produce under the situation that copy process interrupts, because can residual needless programs content, so the operation of deletion after saving has the effect that improves behaviour in service in the copy destination.In addition, above-mentioned deletion is the data on the deletion record medium physically, thereby can not reproduce (deletion indirectly) even can also exist by the data on the deletion management information recording medium.
＜with copy control information relevant mobile processing
Figure 15 is the process flow diagram of step of programme content that the mobile receiving trap of embodiment is shown.
When being " 01 " (No More Copies), copy number, the copy information to management information carries out monitoring whether this mobile processing finishes (SC01) when mobile for the programme content of " 0 ".
When finishing, the programme content of the recording medium of deletion moving source and the management information that is associated with this programme content, input " 01 " (No More Copies) in the copy information of the management information of mobile destination recording medium and becoming forbids the state that copies again, input " 0 " in the copy number of management information and become that programme content can not copy but state movably.
When not finishing, monitor whether mobile processing interrupts (SC02).
When not interrupting, monitor whether mobile processing finishes (SC01).
When interrupting, that preserves the moving source recording medium also moves to the partial programme content of mobile destination recording medium and the management information that is associated with this programme content midway and not mobile, makes it and can not reproduce for the programme content that moves to mobile destination recording medium.Preserve the mobile programme content midway of mobile destination recording medium, input " 01 " (No More Copies) in the copy information of management information and be made as and forbid copy state again, input " 0 " becomes that programme content can not copy but state (SC03) movably in the copy number of management information.
So, the effect that has the copy generational management of the programme content that can reliably must carry out mobile destination.And, even, on moving source and mobile destination, preserve programme content respectively, can not make the programme content can not audiovisual because of interruption because any former thereby produce under the situation of mobile handling interrupt, therefore have the effect that improves behaviour in service.In addition, above-mentioned deletion is the data on the deletion record medium physically, thereby even can also can not reproduce (deletion indirectly) by there being data on the deletion management information recording medium.
In addition, in the above description, the recording medium of copy destination and mobile destination is can manage to forbidding copying the recording medium of (No More Copies) again.In the time can not managing, forbid copy or forbid moving processing.
And, in the above description, illustrated from playing the situation of the programme content of sending at station, for example can also be applied to the programme content that provides enterprise etc. to send from programme content standing except playing.
And removable recording medium has the independent mode that can take off from receiving trap, and means at other to have the recording medium that can reproduce in the device of representational role.
And, move and to be meant that the programme content that will be recorded in " forbidding copying again " (the No MoreCopies) in the recording medium carries out moving of programme content by making it to reproduce after copying other recording medium to.Here, can not reproduce the deletion that is meant by programme content self, the deletion of key or the deletion of management information makes and can not reproduce.Moving processing midway, preferably there is not the state that can reproduce the programme content that surpasses 1 minute length simultaneously in the both sides in moving source and mobile destination.
In the above description, at " allow copy a generation " (Copy One Generation) and expression could copy a plurality of information for " can " programme content, can copy a plurality of being judged as by recording medium is built-in or movably carries out, but can also be undertaken copying a plurality of judgements by the recording medium that can manage a plurality of copies and the recording medium that can not manage a plurality of copies.Here, the recording medium that can manage a plurality of copies is meant following medium: can manage and make and can not illegally rewrite by the information of copy information 507, copy number 508 and key information 506 in the management information of the particular content of the expression programme content of above-mentioned Figure 12 explanation (address, foremost of file sequence number 503, time on date 504, data area and the record size 505 etc. that can also comprise other).
Figure 16 is the structure example that the recording medium (secure removable media) that can manage above-mentioned a plurality of copy management (can be described as the control of copy number, number control copy) is shown.In a recording medium, merge the structure maintain the anti-tamper zone that standard area that the user can visit and user can not visit.The confidential information that is stored in anti-tamper zone is meant, becomes addressablely when can confirm authentication by carrying out authentication processing with the device that can use this recording medium the time, can carry out secret and manage.The information stores of above-mentioned copy information 507, copy number 508 and key information 506 is managed to this anti-tamper zone, thereby can not carry out illegal rewriting.
On the other hand, the recording medium that can not manage a plurality of copies is meant following recording medium: can not manage the information (address, foremost of file sequence number 503, time on date 504, data area and the record size 505 etc. that can also comprise other) of copy information 507, copy number 508 and key information 506 in the management information of the particular content that can not illegally rewrite the expression programme content.
Figure 17 is the process flow diagram of example that the generation step of the copy information of the management information of pen recorder when the programme content of the permission copy generation (Copy One Generation) of recorder device that expression can manage the pen recorder of a plurality of copies and can not manage a plurality of copies and copy number is shown.Be SD02 with the difference of Figure 13.In addition, can make up, can also for example utilize SA02 when " removable ", to carry out SD02 with Figure 13.
For example, judge that by control part 114 recording medium of recorded program content is the recording medium that can manage the recording medium of a plurality of copies or can not manage a plurality of copies, content of announcement management information generating unit 119 (SD02).
In the time can not managing the recording medium of a plurality of copies, for example input " 0 " in the copy number of management information becomes that programme content can not copy and state (SD04) movably.
In the time managing the recording medium of a plurality of copies, contents management information generating unit 119 judge expression could copy a plurality of information be " can " still "No" (SD03), when "No", in the copy number of management information, for example import " 0 " and be made as that programme content can not copy but state (SD04) movably.When " can " time copy number in management information in input " N " and be made as programme content and can copy N state (SD05).
So, make the programme content of the permission copy generation (Copy One Generation) behind the record irrespectively to copy a plurality ofly, have the effect that improves behaviour in service with the time.And; by recording medium be the recording medium that can manage the recording medium of a plurality of copies or can not manage a plurality of copies judge could copy a plurality of; thereby can avoid allowing a plurality of copies, have the effect that further to protect programme content reliably to the recording medium that can not manage a plurality of copies.
In the above description, in the digital copies control information is under the situation of " can copy a generation ", illustrated that being judged as is the object of " can limit number copies " when " digital_recording_control_mode " is " 1 ", when being " 0 ", " digital_recording_control_mode " be judged as the object that is not " can limit number copies ", but can also set the judgement of " 0 " and " 1 " on the contrary for example according to the system status of playing the station.
Promptly, in the digital copies control information is under the situation of " can copy a generation ", illustrated that being judged as is the object of " can limit number copies ", is judged as the object that is not " can limit number copies " when " digital_recording_control_mode " is " 1 " when " digital_recording_control_mode " is " 0 ".Equally, for the represented meaning of other descriptor, also can change over different settings according to situation.
And the meaning of the numerical value that each descriptor such as value of preferred " digital_recording_control_mode " is represented is well-determined by regulation.
And, content utilizes the title (" digital_recording_control_mode " and " digital_recording_control_data " etc.) of descriptor and digital copies control descriptor not need must to be the title among the embodiment, can also adopt other title.
Claims (10)
1. the copy control method of a receiving trap, this receiving trap receiving digital contents and the multiple copy control information that the copy of this digital content is controlled, according to described copy control information described digital content is recorded in first recording medium and second recording medium, described copy control method is characterised in that:
The copy of representing to allow to copy a generation when the first information in the described copy control information that receives is from generation to generation during information,
Under the situation that limited to the number that second information representation in the described copy control information that receives allows copy first to copy number copies,
Can with the state that can copy in described first recording medium described digital content of record management till the second copy number,
Can with the state that can copy in described second recording medium described digital content of record management till the 3rd copy number,
Control make described second the copy number and described the 3rd the copy number and be no more than described first the copy number,
Under the output pathway during to first recording medium and the different situation of the output pathway during to second recording medium with described digital contents copy with described digital contents copy, the copy control that further has nothing in common with each other.
2. copy control method according to claim 1 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the removable recording medium that the digital content local refinement is write down.
3. copy control method, this copy control method receiving digital contents and the multiple copy control information that the copy of this digital content is controlled, copy described digital content to second recording medium from first recording medium according to described copy control information, this copy control method is characterised in that:
The copy of representing to allow to copy a generation when the first information in the described copy control information that receives is from generation to generation during information,
Under the situation that limited to the number that second information representation in the described copy control information that receives allows copy to be scheduled to the copy number copies, can with the state that can copy in record management digital content on described first recording medium till described predetermined copy number, the digital content that will be recorded management under the state that keeps described predetermined copy number in described first recording medium moves to described second recording medium, and
Under the situation that the output pathway of described digital content when first recording medium copies second recording medium to is different, the copy control that has nothing in common with each other.
4. copy control method according to claim 3 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the removable recording medium that the digital content local refinement is write down.
5. copy control method according to claim 3 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the recording medium that connects via digital interface.
6. the copy control method of a receiving trap, this receiving trap receiving digital contents and the multiple copy control information that the copy of this digital content is controlled, according to described copy control information described digital content is recorded in first recording medium and second recording medium, described copy control method is characterised in that:
The copy of representing to allow to copy a generation when the first information in the described copy control information that receives is from generation to generation during information,
Under the situation that limited to the number that second information representation in the described copy control information that receives allows copy first to copy number copies,
Can with the state that can copy in described first recording medium described digital content of record management till the second copy number,
Can with the state that can copy in described second recording medium described digital content of record management till the 3rd copy number,
Control make described second the copy number and described the 3rd the copy number and be no more than described first the copy number.
7. copy control method according to claim 6 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the removable recording medium that the digital content local refinement is write down.
8. copy control method, this copy control method receiving digital contents and the multiple copy control information that the copy of this digital content is controlled, copy described digital content to second recording medium from first recording medium according to described copy control information, this copy control method is characterised in that:
The copy of representing to allow to copy a generation when the first information in the described copy control information that receives is from generation to generation during information,
Under the situation that limited to the number that second information representation in the described copy control information that receives allows copy to be scheduled to the copy number copies, can with the state that can copy in record management digital content on described first recording medium till described predetermined copy number, the digital content that will be recorded management under the state that keeps described predetermined copy number in described first recording medium moves to described second recording medium.
9. copy control method according to claim 8 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the removable recording medium that the digital content local refinement is write down.
10. copy control method according to claim 8 is characterized in that:
Described first recording medium is the built-in recording medium that the digital content local refinement is write down, and described second recording medium is the recording medium that connects via digital interface.
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| JP2002184114A (en) * | 2000-12-11 | 2002-06-28 | Toshiba Corp | System for recording and reproducing musical data, and musical data storage medium |
| JP2003016725A (en) * | 2001-06-27 | 2003-01-17 | Sony Corp | Device and method for transmitting contents data and device and method for processing contents data |
| JP4831890B2 (en) * | 2001-07-06 | 2011-12-07 | パナソニック株式会社 | Content management method and content management apparatus |
| JP4107281B2 (en) * | 2004-10-13 | 2008-06-25 | 株式会社日立製作所 | Digital information recording / reproducing apparatus |
| JP4283210B2 (en) * | 2004-11-30 | 2009-06-24 | パナソニック株式会社 | Content management apparatus, content management method, integrated circuit, and program |
| JP4508082B2 (en) * | 2005-10-31 | 2010-07-21 | ソニー株式会社 | Recording apparatus, recording method, providing apparatus, and information processing method |
| JP4625764B2 (en) * | 2005-12-20 | 2011-02-02 | 日立コンシューマエレクトロニクス株式会社 | Recording apparatus and recorded content management method |
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| CN102402991A (en) * | 2010-09-10 | 2012-04-04 | 日立民用电子株式会社 | Copy control method |
| CN102402991B (en) * | 2010-09-10 | 2014-11-12 | 日立民用电子株式会社 | Copy control method |
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