WO2005034119A1 - 電子透かし情報付加装置、データ再生装置及びデータ記録装置 - Google Patents
電子透かし情報付加装置、データ再生装置及びデータ記録装置 Download PDFInfo
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- WO2005034119A1 WO2005034119A1 PCT/JP2003/012528 JP0312528W WO2005034119A1 WO 2005034119 A1 WO2005034119 A1 WO 2005034119A1 JP 0312528 W JP0312528 W JP 0312528W WO 2005034119 A1 WO2005034119 A1 WO 2005034119A1
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- 238000004891 communication Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 abstract description 48
- 238000009826 distribution Methods 0.000 abstract description 31
- 238000001514 detection method Methods 0.000 description 65
- 238000000034 method Methods 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 230000010076 replication Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/17—Arrangements for conditional access to broadcast information or to broadcast-related services on recording information
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/08—Insurance
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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
-
- 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
- G11B20/00681—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access
- G11B20/00702—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access said measures preventing that data are recorded on the recording medium
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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
- G11B20/00768—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 copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting 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
- G11B20/0084—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 time or date
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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
- G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
- H04N2201/3233—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of authentication information, e.g. digital signature, watermark
- H04N2201/3239—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of authentication information, e.g. digital signature, watermark using a plurality of different authentication information
Definitions
- the present invention relates to a digital watermark information adding device for adding digital watermark information to content data, a data reproducing device for reproducing content data, and a data recording device for recording content data.
- EMD Electronic Music Distribution
- SCMS Serial Copy Management System
- Digital Water Mark digital watermark
- the content industry which provides the content, is concerned about the possibility of unlimited repetition of piracy in the digital environment and the rapid distribution of copied content. Request for proper maintenance.
- CDR Compact Disk Recordable
- An object of the present invention is to detect first-generation recorded data based on information and the like. In both cases, it is possible to detect that the content has been distributed through a network that was not possible before, to prevent the recording of illegal content or the distribution of content illegally,
- the purpose is to provide an environment for using content data according to the intention.
- a digital watermark information adding apparatus has digital watermark information adding means for adding digital watermark information to a content to be broadcasted, In order to determine whether or not the content data is recordable by the terminal that has received the content data, time information indicating a broadcast time of the content overnight is added to the content data as digital watermark information. It is characterized by:
- the digital watermark information adding apparatus includes digital watermark information adding means for adding digital watermark information to content data to be broadcast, and the digital watermark information adding means includes the content data.
- the terminal In the event that an evening is redistributed via the network, the terminal that received it will be able to determine whether the received content is content data that is permitted to be recorded or is legitimate content. Time information indicating the broadcast time of the content data is added to the content data as digital watermark information. 4.
- the digital watermark information adding means adds digital watermark information indicating that the content is a content claiming copyright to the content. Is effective.
- the digital watermark information adding means adds digital watermark information indicating whether or not the content data to be broadcast is permitted to be distributed via a communication line.
- the invention according to claim 5 is a data reproducing apparatus that reproduces content data recorded on a recording medium, wherein a time information presence / absence determining means for determining whether or not time information is added to the recording medium is provided.
- a recording medium type discriminating means for discriminating whether the recording medium is a read-only recording medium or a recordable recording medium; a time measuring means for measuring a current time; and reproducing time information measured by the time measuring means.
- the data reproducing apparatus further comprising: a copyright claim information determining unit configured to determine whether information indicating that a copyright is claimed or other equivalent information is added to the content.
- the time information presence / absence determining means determines that no time information is recorded
- the recording medium type determining means determines that the recording medium is a read-only recording medium
- the copyright claim information determining means determines If it is determined that there is no information indicating that the content data is claimed, it can be interpreted as copy-free content with no restrictions on recording or playback. Outputting is effective.
- the data reproducing apparatus wherein the time information presence / absence determining unit determines that no time information is recorded, and the recording medium type determining unit determines that the recording medium is a recordable recording medium.
- the time information presence / absence determining unit determines that no time information is recorded
- the recording medium type determining unit determines that the recording medium is a recordable recording medium.
- it since it can be interpreted as content that has been conventionally distributed, it is effective to output the content data from the output means without adding time information to the content data to be reproduced in order to obtain compatibility.
- a copyright claim information discriminating means for discriminating whether or not information indicating that a copyright is claimed or other equivalent information is added to the content.
- the time information presence / absence determining means determines that no time information is recorded
- the recording medium type determining means determines that the recording medium is a read-only recording medium
- the copyright claim information determining means determines If it is determined that information indicating that the content is claimed or other equivalent information has been added, it is determined that the disc is a commercially available disc that requires copyright protection. It is effective to output the content data from the output unit with the added time information.
- the copyright claim information discriminating means for discriminating whether or not information indicating that a copyright is claimed or other equivalent information is added to the content content overnight.
- the time information presence / absence determining means determines that no time information is recorded
- the recording medium type determining means determines that the recording medium is a recordable recording medium
- the copyright claim information determining means determines the copyright. If it is determined that the information indicating the claim is added, the content is recorded by a device that does not support the content protection system according to the present invention. It is effective to prohibit playback of contente overnight.
- the copyright claim information discriminating means for discriminating whether or not information indicating that a copyright is claimed or other relevant information is added to the content data.
- the time information presence / absence determining means determines that no time information is recorded
- the recording medium type determining means determines that the recording medium is a recordable recording medium
- the copyright claim information determining means claims copyright. If it is determined that no information indicating that the content is to be copied is not added, it can be determined that content without copy restrictions has been recorded, and the time information is not added to the reproduced content data. It is effective to output the content from the output means.
- the time information presence / absence determining means determines that the time information is recorded, it is interpreted that the content once recorded is to be reproduced. In this case, it is effective to output the content data from the output means without adding new time information to the content to be played back in the present case, leaving the time information recorded on the disc as it is. . Further, in the data reproducing apparatus according to the invention, if the time information is added as digital watermark information, falsification becomes difficult, which is effective. Further, in the data reproducing apparatus according to the present invention, it is effective that information indicating that the copyright is claimed or other equivalent information is added as digital watermark information.
- the time measuring means measures the year, month, and day, and the time information includes only the year, month, and day. It is effective to include
- the time information adding means adds the year, month, and day to the content data to be reproduced in the order of day, month, and year. It is.
- the time data is divided into day, month, and year units, and the data for a shorter period is recorded first to reduce the time until detection. However, it is intended to reduce it.
- the dates are different, the different days are considered to be the most probable, both stochastically and in actual operation, so that a quick conclusion can be made by comparing these dates.
- the clock means sets a limit on the number of times the clock time can be set.
- the invention according to claim 17 is a data recording apparatus for recording input content data, wherein the time information identification means for identifying the time information added to the content overnight and the current time are measured. Time information means, and recording means for recording the content data on a recording medium, wherein it is determined that time information is added to the content data overnight, and the time information identified by the time information identification means is provided. If the current time measured by the clock means matches within a predetermined range, the input content data is currently being reproduced, and the content has not been copied. Since it can be interpreted, this is recorded on the recording medium.
- the data recording apparatus it is determined that time information is added to the content data, and the content data is identified. If the time information and the current time measured by the clocking means do not match within a predetermined range, it can be determined that the input content data is content that has already been recorded once or content that has been distributed over a network. However, it is effective to prohibit the recording of this input data on a recording medium.
- copyright claim information for judging whether or not information indicating that a copyright is claimed or other relevant information is added to the content overnight.
- the copyright claim information for judging whether or not information indicating that a copyright is claimed or other relevant information is added to the content is displayed.
- Determination means wherein it is determined that time information is not added to the content data, and when it is determined that information indicating that a copyright is claimed or other equivalent information is not added to the content data, Since the input content data can be interpreted as content that does not need to be subjected to copy restrictions, it is effective to record it on the recording medium. Further, in the data recording apparatus according to the present invention, it is effective that the time information is added as digital watermark information which is difficult to falsify. Further, in the data recording apparatus according to the invention of claim 22, it is effective that the information indicating that the copyright is claimed or other equivalent information is added as digital watermark information that is difficult to falsify.
- the clocking means can set the clocking time only when the data recording apparatus is manufactured.
- the time measuring means measures year, month, and day, and the time information includes only year, month, and day.
- the clock means sets a limit on the number of times that the clock time can be set.
- FIG. 1 is a block diagram showing a configuration of a data reproducing apparatus 1 according to an embodiment to which the present invention is applied.
- FIG. 2 is a block diagram showing a configuration of the data recording device 2 in one embodiment to which the present invention is applied.
- FIG. 3 is a flowchart showing a data reproduction process 1 executed by the reproduction control unit 106 of FIG.
- FIG. 4 is a flowchart showing a data reproduction process 2 executed by the reproduction control unit 106 of FIG.
- FIG. 5 is a flowchart showing the data recording process performed by the recording control unit 206 of FIG.
- the WM data corresponds to the electronic watermark information described in claims.
- FIG. 1 to FIG. 5 are diagrams showing an embodiment of a data reproducing apparatus and a data recording apparatus to which the present invention is applied.
- FIG. 1 is a diagram showing a functional configuration of the data reproducing device 1 in the present embodiment
- FIG. 2 is a diagram showing a functional configuration of the data recording device 2 in the present embodiment.
- the data reproducing device 1 drives a disk medium such as a CD (Compact Disk) or a DVD (Digital Versatile Disc), or a semiconductor memory medium having a built-in semiconductor memory, and reads data recorded on these various media. It is.
- the data recording device 2 is a device that records data on the various media.
- the media that can be used in the data reproducing device 1 and the data recording device 2 are not particularly limited, and can be applied to media similar to the media and those that will be put into practical use in the future. is there.
- SCMS Serial Copy Managemeni System
- the SCMS information is composed of two bits, and indicates three types of restrictions on copying digital music data.
- the SCMS information “0 0” indicates that there is no restriction on “Copy Free J”, that is, replication.
- the SCMS information “10” indicates “0ne Generation Copy Permitted”, ie, one generation of replication. Only, it indicates that the license is granted, and the SCMS information “11” indicates “No More Copy”, that is, copying is prohibited.
- the digital music data can be copied as digital data only for one generation.
- the digital music data can be copied as digital data only for one generation.
- digital copying of digital music data from the disk media / semiconductor memory media to other media is not licensed.
- digital music data recorded on a CD sold in a package contains electronic data claiming copyright as a 1-bit copyright information bit in the signal bit string. Difficult to falsify It can also be displayed by inserting specific data as digital watermark information.
- the state corresponding to “0 0” in the SCMS information corresponds to “1” in one bit of this copyright information, and the state corresponding to “10” corresponds to this copyright. Corresponds to a state where the bit is '0'.
- the state corresponding to “1 1” in the SCMS corresponds to a state in which 1 bit of this copyright information alternates with 1s and 0s with a cycle of about 1 second.
- the original bit structure of SCMS is used.
- the information in the SCMS includes both the information claiming the copyright and the information indicating the copy generation.
- the digital music data indicates content that is permitted to be freely digitally copied, and the digital music data has SCM S information “1”. If a “1” is added, the digital music data indicates content that has already been copied once, and further digital copies indicate content that is not licensed. It is to be noted that currently commercially available devices capable of digitally copying digital music data generally operate in accordance with the restrictions of the SCM information.
- WM Watermark
- the N-bit data is hereinafter referred to as “WM1 data, WM2 data”, and the configuration is shown in Tables 2 and 3.
- Table 2 Bit configuration of WIVII data
- the WM1 data consisting of 8 bits consists of the first bit, the second and third bits, the fourth bit,
- the first bit is a package containing digital music data with embedded WM1 data embedded in a CD or other store and sold as a package. It indicates whether the data is data for distribution or data for distribution distributed by an EMD (Electronic Music Distribution) service or the like. Specifically, if the first bit is “0”, the digital and audio data in which the embedded data is embedded are package media data, and if the first bit is “1”, The digital music data in which the embedded data is embedded is data for distribution.
- EMD Electronic Music Distribution
- the data for distribution refers to digital music data that is authorized to be distributed by EMD or the like, and that can be used for normal digital music data distribution by an authorized distribution device.
- the WM 1 de is embedded in the night. Therefore, not all digital music data distributed via a communication network is data for distribution.
- the data of the second and third bits shown in Table 2 are grouped into two bits, indicating three restrictions on the copying of digital music data.
- the data of the second and third bits is “00”, it indicates “CopyFree”, that is, there is no restriction on copying.
- the second and third bits of the data are “10”, it indicates “0ne Generation Copy Permitted”, that is, only one generation copy is permitted, and the second and third bits of the data are not permitted. If the value is "1 1”, it indicates "No More Copy”, that is, copying is prohibited.
- the fourth bit data shown in Table 2 is data for identifying whether the type of package media on which digital music data is recorded is a disc medium or a semiconductor memory medium, and is set to “0”. Indicates that it is a disk medium, and "1" indicates that it is a semiconductor Indicates a memory medium.
- the data of the 5th to 8th bits shown in Table 2 are grouped into 4 bits, and the contents of the package media on which the digital music data is recorded are indicated by the 4th bit. Following the type of media, the data is used to identify whether the media is playable or recordable.
- the fourth bit is “1”, indicating the semiconductor memory media, and when the fifth to eighth bits are “0000”, the CF (CompactFlash) memory is used. In this case, it can be expressed as SD (Secure Digital) memory.
- SD Secure Digital
- digital music data in which the WM1 data “0 1 0 0 0 0 0 0” is embedded is data that was recorded on package media, and only one generation can be copied as digital data.
- Possible CD—R ⁇ M can be identified.
- the WM1 data composed of 8 bits is data indicating the origin of digital music data, restrictions on digital copying defined for the digital music data, and the type and contents of each media. .
- the structure of the WM1 data is not limited to the 8-bit data shown in Table 2, but the number of bits / data allocation can be changed as appropriate according to the distribution method and media diversification. Of course, it may be possible.
- Table 3 Bit configuration of WM2 data
- the WM2 table consisting of 17 bits consists of the first to eighth bits, the ninth to 12th bits, and the The data content is divided into 13 to 17 bits and identified.
- This WM2 data is a time for indicating the distribution time at the time of data distribution and the recording time at the time of media recording as time information “year, month, day”.
- the 1st to 8th bits are data indicating the “year” of the time information, and ⁇ m * FF (m]? A) It is possible to set the year and night for 256 years with 8 bits. This takes into account that the rights of the copyright right will not be extended any longer in the future.
- the ninth to 12th bits are data indicating the “month” of the time information, and January to February can be set with 4 bits.
- the 13th to 17th bits are data indicating “date” of the time information, and 1 to 31 days can be set with 5 bits. These data can also be represented by BCD codes, in which case the number of bits is naturally different.
- the timing for recording WM2 data in digital music data includes the case of recording at the time of data distribution, the case of recording at the time of manufacture of a package media, and the data reproduction device 1.
- a case where digital music data read from a package media is added to playback data and output will be described in detail in an operation description to be described later.
- the configuration of WM2 data is not limited to the 17 bits shown in Table 3, but the number of bits divided by the data allocation contents may be appropriately adjusted in accordance with the diversification of digital music data usage.
- the time information may be changed. For example, time information of hours, minutes, and seconds may be added.
- the WM 1 and WM 2 data are embedded in digital music data by the so-called “Digital Water Mark (digital watermark)” technology, and are recorded so that they cannot be recorded or modified by ordinary consumers. is there.
- Digital Water Mark's recording technology for digital music data the ones that have already been used in general can be applied. Is possible.
- the first bit is set to “1”, and the second and third bits are based on the intention of the copyright holder.
- WM that sets the data corresponding to the 4th to 8th bits when the data for distribution is used from a disk medium on which the original data is recorded or from a semiconductor memory medium. 1 Data is embedded, WM with time information indicating the distribution time is set.2 Data is embedded, and the data is reproduced via a broadcasting station, network, and corresponding receiving device. Delivered to device 2.
- the first bit is set to “0” and the second to eighth bits are assigned to the copyright holder.
- Data based on the intention is set, and the reproduction process in the data reproducing device 1 and the recording process in the data recording device 2 are set to be controllable.
- the data reproducing apparatus 1 has a disk media reading unit 101, a semiconductor memory media reading unit 102, a media judging unit 103, a WM 1 detecting unit 104, and a WM 2 detecting unit. It comprises a unit 105, a playback control unit 106, a WM2 adding unit 107, a time code generator 108, and a DA converter 109.
- the disk media reading unit 101 reads digital music data from disk media (various CDs, various DVDs, etc.) on which digital music data is recorded, and determines the read digital music data as media. Output to the section 103 and the WM1 detection section 104.
- the semiconductor memory media reader 102 stores digital music data. Reads digital music data from recorded semiconductor memory media (various memory cards such as CF memory and SD memory) and outputs the read digital music data to the media determination unit 103 and the WM1 detection unit 104 .
- the media determination unit 103 determines the WM 1 data. Analyzes the setting contents, determines whether the disc media or semiconductor memory media on which digital music data is recorded is a playback type media or a recording type media, and outputs the media determination result to the playback control unit 106. I do.
- the detection unit 104 detects WM1 data from digital music data input from the disc media reading unit 101 and the semiconductor memory media reading unit 102, and detects the WM1 data detection result. It outputs to the playback control unit 106 and the digital music data after the detection processing to the WM2 detection unit 105.
- the WM2 detector 105 detects WM2 data from the digital music data input from the WM1 detector 104 and outputs the WM2 data detection result to the reproduction controller 106. At the same time, the digital music data after the detection processing is output to the WM2 adding unit 107.
- the playback control unit 106 includes a media determination result input from the media determination unit 103, a WM1 data detection result input from the WM1 detection unit 104, and a WM2 detection unit 105. Based on the WM2 data detection result input from the WM2, data reproduction processing 1 (see FIG. 3) and data reproduction processing 2 (see FIG. 4) described later are executed.
- the WM data is read from the data read from the disk media by the disk media reading unit 101 or from the data read from the semiconductor memory media by the semiconductor memory media reading unit 102. If the detection unit 104 does not detect the WM 1 data, the digital music data read is decoded and reproduced because the copyright protection according to the present invention is not necessary.
- the signal is output from the digital output terminal T1 or the analog reproduced signal after analog conversion is output from the analog output terminal T2.
- the WM1 data is detected from the reading data overnight, the second and third bits indicate “10” indicating that the first generation recording is possible, and the content detected by the media determination unit 103 is further included. If it is a recordable media, and if WM2 data is detected by the WM2 detection unit 105, it can be determined that the content has been recorded once correctly, so the playback control unit 106 Decodes and reproduces the read digital music data without exclusion, and outputs the digital playback signal including the recorded WM2 data directly to the digital output terminal T1 or the analog playback signal after analog conversion. Output from output terminal T2.
- the WM1 data is detected from the reading data overnight
- the second and third bits indicate “10” indicating that the first generation recording is possible
- the content detected by the media determination unit 103 is further included. If the WM2 data is not detected by the WM2 detection unit 105 on a playback-type medium, it can be determined that the content is commercial content claiming copyright protection corresponding to the legitimate invention,
- the playback control unit 106 converts the time code generated from the time code generator 108 into a digital playback signal obtained by decoding the read digital music data and reproducing it as new WM2 data.
- the digital playback signal to which the new WM2 data is added is output from the digital output terminal T1, or the analog playback signal after analog conversion is output from the analog output terminal T2.
- the medium determination unit 103 detects that the medium is a recordable medium, and the WM 2 detection unit 105 does not detect the WM 2 data, the playback control unit 100 6 judges that the digital music data is illegal recording media and stops playing the read digital music data.
- the playback control unit 106 converts the time code generated from the time code generator 108 into a digital playback signal obtained by decoding the read digital music data and playing back the new WM2.
- the digital playback signal to which the new WM2 data is added is output from the digital output terminal T1, or only the analog playback signal after analog conversion is output from the analog output terminal T2.
- the WM2 adding unit 107 receives the WM2 data input from the WM2 detecting unit 105 in response to the WM2 data adding instruction input from the playback control unit 105,
- the time code (see the bit configuration in Table 3) input from the time code generator 108 is added as new WM2 data to the digital music data converter on the digital Output to terminal T1.
- the time code generator 108 measures the date and adds the WM 2 as the time code (see the bit configuration in Table 3) to the time information. Output to section 107.
- the DA converter 109 converts the digital music data input from the WM2 adding section 107 into an analog signal, and outputs an analog reproduction signal to the analog output terminal T2.
- the overnight recording device 2 includes a WM 1 detection unit 201, a WM 2 detection unit 202, a time code comparison unit 203, a time code generation unit 204, and recording. It comprises a control unit 206, a disk media recording unit 210, and a semiconductor memory media recording unit 211.
- the WM 1 detection unit 201 digitizes an analog music signal input from an analog input terminal (not shown), detects WM 1 data from the digital music data, or is input from a digital input terminal (not shown). WM1 data is detected from the digital music data to be output, the WM1 data detection result is output to the recording control unit 206, and the digital music data after the detection processing is output to the WM2 detection unit 202. Output.
- the WM2 detection unit 202 detects WM2 data from the digital music data input from the WM1 detection unit 201, and records the WM2 data detection result in the recording control unit 206 and time code.
- the digital music data is output to the comparing section 203, and the digital music data after the detection processing is output to the disk media recording section 210 and the semiconductor memory media recording section 211.
- the time code comparison unit 203 matches the time code included in the WM 2 data input from the WM 2 detection unit 202 with the time code input from the time code generation unit 204. The result is compared to the recording control unit 206.
- the time code generator 204 measures the date and time, and uses the measured time information as a time code (see the bit configuration in Table 3) as a time code comparator 203 and a recording controller 204. Output to 6.
- the recording control unit 206 receives the WM 1 data detection result input from the WM 1 detection unit 201, the WM 2 data detection result input from the WM 2 detection unit 202, and the time code comparison unit 2
- a data recording process (see FIG. 5), which will be described later, is executed based on the time code comparison result input from 03 and the disc in the disk media recording unit 210 and the semiconductor memory media recording unit 211 is executed. It controls the recording of digital music data on media and semiconductor memory media.
- the recording control unit 206 determines that the copy is free, and the digital music data is used as it is by the disc media recording unit 210 for disc recording. Recording on a medium or recording on a semiconductor memory medium by a semiconductor memory medium recording unit 211.
- the recording control unit 206 detects the WM 1 data by the WM 1 detection unit 201, detects the WM 2 data by the WM 2 detection unit 202, and sets the time code comparison unit 20 If the comparison result of the time code (year / month / day data) according to 3 matches the current time, it is determined that the digital music data is being played on the original commercial disc, and the disc media recording section is left as it is.
- the sound is recorded on the disk medium by 210 or the semiconductor memory medium is recorded by the semiconductor memory medium recording section 211.
- the recording control unit 206 detects the WM 1 data by the WM 1 detection unit 201, detects the WM 2 data by the WM 2 detection unit 202, and sets the time code comparison unit 20 If the time code (year / month / day data) comparison result by step 3 does not match the current time, it is determined that the output is already recorded content and the input digital music data is recorded. Ban.
- the recording control unit 206 sets the protection system of the present invention when the WM 1 detection unit 201 detects WM 1 data and the WM 2 detection unit 202 does not detect WM 2 data. It is judged that the digital music data is being played back on a device that does not support the protection system or that the digital music data was recorded on a device that does not support the protection system of the present invention. Ban.
- the disk media recording unit 210 records the digital music data input from the WM2 detection unit 202 on the disk media according to the recording control signal input from the recording control unit 206.
- the semiconductor memory media recording unit 211 records digital music data input from the WM2 detection unit 202 on the semiconductor memory medium according to a recording control signal input from the recording control unit 206.
- the playback control unit 106 does not judge the illegally recorded media based on the media judgment result.
- the reproduction control unit 106 discs the disc based on the detected WM1 data and WM2 data. Executes playback control of digital music data read from the media or semiconductor memory media.
- the reproduction control unit 106 first receives data read from the disk medium by the disk medium reading unit 101 or the semiconductor memory medium by the semiconductor memory medium reading unit 102. It is determined whether or not WM 1 data has been detected by the WM 1 detection unit 104 from the data read from (step SI, S 2) o
- the playback control unit 106 decodes and reproduces the read digital music data, and outputs only the digital reproduction signal to the digital output terminal T1, Alternatively, only the analog reproduction signal after the analog conversion is output from the analog output terminal T2 (steps S4 and S5).
- the playback control unit 106 When WM1 data is detected from the read data, the playback control unit 106 further determines whether or not WM2 data has been detected by the WM2 detection unit 105 ( Step S3).
- the playback controller 106 decodes and plays the read digital music data, and outputs only the digital playback signal to the digital output terminal. Only T1, or the analog converted signal after analog conversion is output from the analog output terminal T2 (steps S4, S5).
- the playback control unit 106 If WM1 data is detected after reading data and no WM2 data is detected by the WM2 detection unit 105, the playback control unit 106 generates the WM1 data from the time code generator 108.
- the time code is added to the digital playback signal obtained by decoding the read digital music data and played back as a new WM 2 data by the WM 2 adding section 206 (steps S 6 and S 7). Only the digital reproduction signal to which the new WM2 data has been added is output from the digital output terminal T1, or only the analog reproduction signal after analog conversion is output from the analog output terminal T2 (step S8).
- the playback control unit 106 determines that the media to be played back corresponds to the protection system of the present invention based on the media determination result and the detected WM1 data and WM2 data. Determines whether it is a recording medium and, based on the result of determining whether to add WM2 to the playback data, executes playback control of the digital music data read from the disc media or semiconductor memory media. .
- the reproduction control unit 106 first reads the data read from the disk medium by the disk media reading unit 101 or the semiconductor memory media read by the semiconductor memory media reading unit 102. Based on the data, it is determined whether or not WM 1 data has been detected by the WM 1 detection unit 104 (steps S 101 and S 102).
- the playback controller 106 determines that the content does not require copyright protection and decodes the read digital music data.
- the digital reproduction signal is reproduced and output from the digital output terminal T1 or the analog reproduction signal after analog conversion from the analog output terminal T2 (steps S105 and S106).
- the reproduction control unit 106 When WM1 data is detected from the read data, the reproduction control unit 106 further determines whether or not the medium is a recordable medium by the media determination unit 103 (step S103). If it is determined that the medium is a recordable media, the playback control unit 106 further determines whether or not WM2 data is detected by the WM2 detection unit 105 (step S104).
- the reproduction control unit 106 determines that the recording medium is the regular recording medium, decodes and reproduces the read digital music data, and outputs the digital reproduction signal to the digital output terminal T. 1. Or, output the analog playback signal after analog conversion from the analog output terminal T2 (steps S105, S106).
- the medium determination unit 103 determines that the medium is a recordable medium, and the WM2 detection unit 105 does not detect WM2 data (step S102). , S103, S104), the playback control unit 106 determines that the recording medium is an illegal recording medium, and stops the reproduction of the read digital music data.
- the playback control unit 106 Adds the time code generated by the time code generator 108 as new WM2 data to the digital playback signal decoded from the read digital music data and played back (step S108). , S109), and outputs the digital playback signal to which the new WM2 data is added from the digital output terminal T1 or the analog playback signal after analog conversion from the analog output terminal T2.
- WM 1 data and WM 2 data are prepared as two types of WM (Watermark) data in order to embed them in the input digital music data.
- WM Watermark
- the date is set as time information indicating the recording time.
- the data reproducing device 1 controls the reproduction of the digital recording data recorded on the disk media and the semiconductor memory media based on the WM 1 data and the WM 2 data.
- digital music data recorded on each media can be optimally controlled for reproduction according to the intention of the copyright holder.
- Condition 1 Commercial content requiring original copyright protection. In this content, W M1 data is added, and W M2 data is not added.
- the data reproducing device 1 decodes and reproduces the digital music data read from the medium, and outputs the reproduced data with a new WM2 data set with a time code added thereto. .
- WM2Data is added and output to the output destination.
- WM 2 is recorded along with the music data on the media. For this reason, the time at the time of recording is recorded as W M 2 on the media once recorded.
- the presence of WM 2 can determine that the input data is the content that has already been recorded once. , Commercial containers that require copyright protection of the original You can restrict more than one copy of a print.
- WM1 data is added to the media that is properly recorded according to the protection system of the present invention, and WM2 data is further added.
- the data reproducing device 1 decodes the digital music data read from the recording medium recorded according to the protection system of the present invention, and reproduces the digital music data without changing or adding a new WM 2. You.
- the output destination is a data recording device compatible with the protection system of the present invention
- the content already recorded once in the presence of WM 2 Since it can be determined that the reproduction is over night, the second copy of the reproduction can be restricted.
- Condition 3 In the case of media recorded by a device that does not support the protection system of the present invention, WM1 data is added, but WM2 data is not added regardless of the recording media.
- the playback of the digital music data read from the media recorded by the device that does not support the protection system of the present invention is stopped.
- Condition 4 In the case of copy free media, W M1 and W M2 data are not added in any case.
- the digital music reproducing device 1 decrypts the digital music data read from the medium and reproduces the data as it is. Therefore, it can be played back in accordance with copy-free playback media or recordable media.
- the recording control unit 206 receives the WM 1 data detection result input from the WM 1 detection unit 201, the WM 2 data detection result input from the WM 2 detection unit 202, Based on the time code comparison result input from the time code comparison unit 203 and the mutual authentication result input from the mutual authentication / decryption unit 205, the disk media recording unit 210 and the semiconductor It controls the recording of digital music data on the disk media and semiconductor memory media in the memory media recording unit 211.
- the recording control unit 206 first receives a WM 1 data detection result from the input music signal or digital music data by the WM 1 detection unit 201 (step S 200). 1).
- the recording control unit 206 determines whether or not WM1 data has been detected by the WM1 detection unit 201 (step S202). If no WM1 data is detected, the recording control unit 206 determines that the copy is free, and causes the digital music data to be directly recorded on the disk media by the disk media recording unit 210, or a semiconductor memory media. The recording is performed on the semiconductor memory medium by the recording unit 211 (step S205).
- the recording control unit 206 When the WM 1 detection unit 201 detects the WM 1 data over time (step S 202), the recording control unit 206 further operates the WM 2 detection unit 2. It is determined whether or not WM2 data has been detected based on 02 (step S203).
- the recording control unit 206 determines the time code comparison result of the time code comparison unit 203 (the time code of the current time generated by the time code generation unit 203 (year / month Day data) and the time code (year, month, day, day, evening) included in the detected WM 2 data) (step S204) StammCheck whether the WM 2 data If the time coincides with the current time, it can be determined that the input music signal is currently playing a commercially available original disc on a playback device compatible with the protection system of the present invention. Is to record the digital music data together with WM 2 indicating the current time on the disk media by the disk media recording unit 210 as it is, or to store the semiconductor memo in the semiconductor memory media recording unit 211. To be recorded on the media (step S 2 0 5).
- the recording control unit 206 detects the WM 1 data by the WM 1 detection unit 201 (step S 202), and detects the WM 2 data by the WM 2 detection unit 202 (step S 202). If the comparison result of the time code (year / month / day data) by the time code comparison unit 203 does not match the current time (step S 204), the content file already recorded before is output. Since it is possible to determine that the content is distributed via a network, the recording of digital music data that has been input is prohibited so as to prevent unauthorized recording (step S206).
- the recording control unit 206 detects the WM 1 data by the WM 1 detection unit 201 (step S 202) when the WM 2 data is not detected by the WM 2 detection unit 202 (step S 200). 203), protection of the present invention Since it can be determined that the signal is from a playback device that is not compatible with the system, the recording of the digital music data input to protect the content is stopped (step S206).
- the recording control unit 206 of the data recording device 2 of the present embodiment includes the WM1 data detection result input from the WM1 detection unit 201 and the WM2 detection unit 202 Based on the WM2 data detection result input from the WM2 and the time code comparison result input from the time code comparison unit 203, the disk media in the disk media recording unit 210 and the semiconductor memory media recording unit 211 Since digital music data recording to semiconductor memory media is controlled, for example, input from each media in accordance with the following conditions P ⁇ ⁇ ⁇ ⁇ ⁇ to P4 for package media and conditions N1 to N ⁇ for broadcast distribution media is as follows.
- the optimal recording control can be executed for the music signal or digital music data according to the intention of the copyright holder.
- the data recording device 2 encodes the input digital music data or music signal as determined to be data corresponding to the protection system of the present invention, and as it is, the disk media or semiconductor memory Recorded on media.
- the first-generation recording of the reproduction signal can be executed in accordance with the original recording medium, and the subsequent second-generation illegal copying can be restricted.
- ' Condition P2 When a commercially available original media reproduces media recorded in accordance with the protection system of the present invention using a data reproducing apparatus compatible with the protection system of the present invention, digital music data or a music signal to be reproduced is not reproduced. WM 1 data and WM 2 data are added. However, in this case, the data of WM 2 indicates the past time and does not match the current time.
- the recording device 2 can determine that the input signal has already been recorded for the first generation or is the content distributed over the network, so the right holder removes the signal. If desired, these can be stopped by the recorder.
- Condition P3 Digital music data or a music signal played back by a data playback device that is not compatible with the protection system of the present invention has WM1 data added, but WM2 data is not added.
- the digital recording device 2 can determine that the input is from a playback device that does not support the protection system of the present invention. Stop recording music or recording music overnight.
- Condition P4 When copy-free media is played, W M1 and W M data are not added.
- the digital music recording device 2 When such a signal is input, the digital music recording device 2 records the input digital music data or music signal as it is.
- Condition N1 W M1 and W M2 data indicating the broadcast time are added to the broadcast content requiring copyright protection. When this is received by the tuner, W M1 data and W M2 data are added to the output. (Current time information)
- Condition N2 When content is broadcast without restrictions on copying, it is broadcast without adding WM1 and WM2.
- the W M1 and W M2 data are of course not added to the output of the tuner that receives this.
- the above condition N1 corresponds to the output when the playback device corresponding to the protection system of the present invention plays the commercial original media.
- the above condition N2 corresponds to the case where copy-free content is reproduced.
- the recording device corresponding to the protection system of the present invention can perform recording for time shift, but can prevent recording of the second generation which records the data again.
- time code generator 108 described in the above embodiment may be configured such that the clock time can be set only at the time of manufacturing the data reproducing apparatus 1.
- the time code generator 108 may be configured to generate a time code by measuring the world standard time. In the time code generator 108, the date was measured, but the time code generator 108 may be configured to measure the time to hours, minutes, and seconds.
- time code generation section 204 shown in the above embodiment may be configured such that the clock time can be set only at the time of manufacturing the recording device 2. Further, the time code generation section 204 may be configured to measure the world standard time and generate the time code. In addition, in the evening code generation section 204, the date was measured, but It may be configured to count down to seconds.
- time code generator 108 and the time code generator 204 are configured so that the user can set them, a limit may be imposed on the settable number of times.
- the WM2 adding unit 107 may add a time code including the date, hour, minute, and second input from the time code generator 108 as WM2 data.
- the WM2 adding unit 208 may add a time code including the year, month, day, hour, minute, and second input from the time code generating unit 204 as WM2 data.
- the control for broadcasting or distributing the content may be performed, for example, in accordance with the flowchart shown in FIG. 3 described above. It will be delivered. In other words, when the content provider adds the WM2 data according to the timing of the provision, the broadcaster / distributor may simply play back the content, and the addition of the WM2 data is left to the broadcaster / distributor.
- the broadcaster / distributor adds WM2 data at the broadcast / distribution timing.
- terminals that directly receive broadcasts and distributions can record content based on the match between the time information of the timekeeping means and the WM2 data.
- the terminal that receives the redistributed content must record the content data due to the discrepancy between the WM2 data included in the content and the time information clocked by the timer. Can't. This prevents inexhaustible copying.
- the reproduction time is written in the reproduced content. Be included. If an individual attempts to record it directly on a recording device, the present invention enables recording as before. (As a first generation recording)
- the reproduced content is distributed over the network, for example, if the data is once recorded on the HDD of a PC and the data is uploaded to a homepage or an FTP site, the data is downloaded. If you try to record, this time should be quite different from the time the data was played. Then, in the present invention, since the time code of WM2 is different from the recording time, the recording is automatically prohibited. In other words, the network distribution data is exactly the same as the data recorded for one generation, which is eliminated by the function that prevents the recording of the second generation.
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Abstract
Description
Claims
Priority Applications (6)
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EP03818818A EP1669993A4 (en) | 2003-09-30 | 2003-09-30 | DIGITAL FILIGRINE INFORMATION ADDITION DEVICE, DATA REPRODUCTION DEVICE, AND DATA RECORDING DEVICE |
PCT/JP2003/012528 WO2005034119A1 (ja) | 2003-09-30 | 2003-09-30 | 電子透かし情報付加装置、データ再生装置及びデータ記録装置 |
US10/573,673 US20070088954A1 (en) | 2003-09-30 | 2003-09-30 | Digital watermark information adding device, data reproduction device and data recording device |
CN03827138.9A CN1839438A (zh) | 2003-09-30 | 2003-09-30 | 数字水印信息附加设备、数据再现设备以及数据记录设备 |
DE03818818T DE03818818T1 (de) | 2003-09-30 | 2003-09-30 | Einrichtung zum hinzufügen digitaler wasserzeichen-informationen, datenwiedergabeeinrichtung und datenaufzeichnungseinrichtung |
US12/243,119 US20090031160A1 (en) | 2003-09-30 | 2008-10-01 | Digital watermark information adding device, data reproduction device and data recording device |
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PCT/JP2003/012528 WO2005034119A1 (ja) | 2003-09-30 | 2003-09-30 | 電子透かし情報付加装置、データ再生装置及びデータ記録装置 |
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US12/243,119 Division US20090031160A1 (en) | 2003-09-30 | 2008-10-01 | Digital watermark information adding device, data reproduction device and data recording device |
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CN101093677B (zh) * | 2003-07-07 | 2012-09-19 | Lg电子株式会社 | 记录介质、在记录介质上记录控制信息的方法及其装置 |
US7564760B2 (en) * | 2003-07-09 | 2009-07-21 | Lg Electronics, Inc. | Recording medium, method of configuring disc control information thereof, recording and reproducing method using the same, and apparatus thereof |
KR101024904B1 (ko) * | 2003-08-14 | 2011-03-31 | 엘지전자 주식회사 | 기록매체, 기록방법, 기록장치 및 기록재생시스템 |
MXPA06001715A (es) * | 2003-08-14 | 2006-05-19 | Lg Electronics Inc | Medio de grabacion, metodo de configuracion de la informacion de control del mismo medio, metodo de grabacion y reproduccion utilizando el mismo y aparato para el mismo medio. |
EP1751749B1 (en) * | 2004-05-13 | 2014-12-17 | LG Electronics Inc. | Recording medium, read/write method thereof and read/write apparatus thereof |
KR101041809B1 (ko) * | 2004-07-27 | 2011-06-17 | 엘지전자 주식회사 | 광디스크 및 광디스크 제어정보 구성방법 및 이를 이용한광디스크 기록재생방법과 장치 |
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US20090031160A1 (en) | 2009-01-29 |
EP1669993A4 (en) | 2011-11-23 |
CN1839438A (zh) | 2006-09-27 |
DE03818818T1 (de) | 2006-11-30 |
EP1669993A1 (en) | 2006-06-14 |
US20070088954A1 (en) | 2007-04-19 |
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