Classifications

• • 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]
  • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
  • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
  • H04N21/835—Generation of protective data, e.g. certificates
  • H04N21/8358—Generation of protective data, e.g. certificates involving watermark
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
  • G06T1/00—General purpose image data processing
  • G06T1/0021—Image watermarking
  • G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
  • G06T1/0071—Robust watermarking, e.g. average attack or collusion attack resistant using multiple or alternating watermarks
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/32—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
  • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
  • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/32—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
  • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
  • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
  • H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
  • H04N1/32288—Multiple embedding, e.g. cocktail embedding, or redundant embedding, e.g. repeating the additional information at a plurality of locations in the image
  • H04N1/32299—Multiple embedding, e.g. cocktail embedding, or redundant embedding, e.g. repeating the additional information at a plurality of locations in the image using more than one embedding method
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
  • G06T2201/00—General purpose image data processing
  • G06T2201/005—Image watermarking
  • G06T2201/0065—Extraction of an embedded watermark; Reliable detection

Definitions

• the present invention relates to the field of the fight against the reproduction, representation or any other illicit use of multimedia data. It relates more particularly to the tattoo control (in English "watermark”) of multimedia data.
• watermarking of multimedia data consists in inserting into this data information which is not or hardly perceptible. This information may concern in particular copying rights or prohibitions.
• tattooing techniques evolve over time without compatibility being guaranteed between generations of tattooing. This poses two problems: - first generation multimedia data readers cannot control the copying of data containing only second generation tattoos;
• the object of the present invention is to solve the above problems.
• one of the objectives of the present invention is to allow a method and / or device for controlling watermarking of multimedia data to perform certain operations, in particular: the detection of several types of watermarking,
• the invention also aims to allow the tattoo control methods and devices to update tattoo or operation parameters as described above.
• Another objective of the invention is the implementation of tattoo parameters corresponding to a new type of tattoo and / or new operations as described above.
• the invention provides a watermarking control method for a set of multimedia data comprising a step of implementing a first detection operation capable of detecting a first type of watermarking remarkable in that it comprises a stage of implementation of at least a second detection operation capable of detecting at least a second type of tattoo.
• the invention allows the implementation of tattoo detection operations corresponding to at least two different types.
• One can thus advantageously detect tattoos of different generations and / or offered by different manufacturers.
• the watermarking control method is remarkable in that it comprises a step of implanting detection information necessary for the implementation of at least one of the second detection operations.
• the invention allows an evolution of the tattoo detection methods or means which can thus adapt to new generations of tattoos without losing the ability to detect older generations.
• the watermarking control method is remarkable in that it further comprises an operation for updating at least one of the detection operations.
• the invention makes it possible to update or replace an existing tattoo detection method or means capable of detecting a first or a second type of tattoo according to any criteria.
• the invention advantageously allows great flexibility of use while allowing relatively economical implementation.
• the tattoo control method is remarkable in that at least one of the detection operations implemented is followed, when a tattoo is detected, by an operation for extracting information from the detected tattoo. .
• the invention allows the extraction of relatively rich information which can subsequently be used to authorize or inhibit the use of multimedia data for playing, recording and / or any processing.
• the watermarking control method is remarkable in that with each of the detection operations, a generation operation of at least one is associated authorization or partial inhibition parameter taking into account the result of the detection operation.
• the invention takes advantage of the detection of each type of watermarking and of the possible information extracted to generate an authorization or inhibition parameter.
• the watermarking control method is remarkable in that the generation operation also takes into account at least one parameter external to the detection operation which is associated with it. .
• the watermarking control method is remarkable in that the external parameter comprises a validation of signature and / or information of the presence or not of an encryption and / or information identifying a type of recording medium or not .
• this characteristic is particularly advantageous since it allows taking into account not only characteristics specific to watermarking but also external parameters which may be important for the allocation of authorizations or inhibitions.
• the watermarking control method is remarkable in that it further comprises a step of updating at least one of the generation operations and / or of implementing a new generation operation d '' at least one authorization or partial inhibition parameter.
• the invention advantageously allows an evolution of the methods or means for generating parameters.
• the watermarking control method is remarkable in that it further comprises at least one operation for generating at least one authorization or final inhibition parameter, each final authorization parameter taking into account has at least some of the authorization or partial inhibition parameters.
• the tattoo control method is remarkable in that the operation for generating a final authorization or inhibition parameter includes a Boolean operation of all the authorization or partial inhibition parameters.
• the invention is advantageously particularly simple to implement.
• the watermarking control method is remarkable in that the operation of generating a final authorization or inhibition parameter also takes into account a priority associated with at least one parameter among the parameters d authorization or partial inhibition.
• the invention makes it possible to take advantage in a very complete and fine manner of the parameters of authorizations or partial inhibitions.
• the watermarking control method is remarkable in that it further comprises an operation for updating at least one of the operations for generating a final authorization or inhibition parameter and / or implantation of at least one new operation for generating a final authorization or inhibition parameter.
• the watermarking control method is remarkable in that at least one of the final authorization or inhibition parameters belongs to the group comprising:
• the invention advantageously makes it possible to particularize each authorization parameter according to a use of the multimedia data by a receiver.
• the watermarking control method is remarkable in that it comprises a step of transmitting authorized and / or uninhibited data among the multimedia data set.
• the invention advantageously allows the transmission of authorized multimedia data.
• the watermarking control method is remarkable in that it comprises a step of downloading, via at least one download channel of the multimedia data set, at least one of the information belonging to the group:
• the invention also proposes a multimedia terminal remarkable in that it comprises tattoo control means implementing a tattoo control method as described above.
• the invention further provides a device for controlling watermarking of a multimedia data set comprising a first detection means capable of detecting a first type of watermarking and intended to cooperate with a multimedia terminal remarkable in that it comprises at least a second detection means capable of detecting at least a second type of tattoo.
• a device for controlling watermarking of a multimedia data set comprising a first detection means capable of detecting a first type of watermarking and intended to cooperate with a multimedia terminal remarkable in that it comprises at least a second detection means capable of detecting at least a second type of tattoo.
• the invention also provides a means of storing information readable by a computer or a microprocessor remarkable in that it retains instructions from a computer program.
• the invention also provides a removable information storage means, partially or totally readable by a computer or a microprocessor, remarkable in that it comprises sequences of instructions suitable for implementing a watermarking control method. as previously described.
• the invention can be advantageously implemented in a hardware or software form.
• FIG. 1 schematically shows a home network or device comprising a source and several receivers according to the present invention in a particular embodiment
• FIG. 2 schematically shows a home network or device comprising several sources and several receivers according to the present invention in a particular embodiment
• FIG. 3 shows in the form of a block diagram a watermarking controller according to the present invention in a particular embodiment
• FIG. 4 shows in the form of a block diagram a watermarking controller further comprising an external parameter analyzer according to a first variant according to the present invention in a particular embodiment
• - Figure 5 schematically shows a tattoo control device according to the present invention in a particular embodiment
• FIG. 6 is a flow diagram of a watermarking control method according to the present invention in a particular embodiment
• FIG. 7 is a flowchart detailing a watermarking control method further comprising an operation of analyzing external parameters according to a first variant according to the present invention in a particular embodiment
• FIG. 8 is a flowchart detailing a tattoo detection operation and tattoo information extraction
• FIG. 9 is a flowchart for updating the parameters corresponding to a given type of watermarking or for adding one or more modules in accordance with the present invention in a particular embodiment.
• One of the general principles of the invention is based on operations carried out from a set of multimedia data, in particular the detection of several types of watermarking, the extraction of watermarking information, the taking into account of external parameters, the generation of authorizations or partial or final inhibitions and / or the emission of all or part of multimedia data for an authorized use.
• Another general principle of the invention is based on updating the operations described above or on implementing new operations as described above.
• FIG. 1 schematically illustrates a multimedia home network or appliance 100.
• the network or device 100 includes in particular:
• the source is a network or device element whose role is to control the watermarking of multimedia data in order to deliver only authorized data to receivers suitable for playing (i.e. for example to represent or display) , to record and / or in general to process multimedia data.
• the source 110 accepts Dext 101 data as input having in particular:
• the source 110 provides data with authorization Dp, Dr on outputs 102, 103, ... 104 respectively inputs of the receivers 106, 107 ... 108.
• the source 110 is for example a digital multimedia decoder (in English "set top box") connected to several receivers 106 to 108 of peripheral type such as in particular televisions, video recorders, DVD recorder.
• the source 110 and the receivers 106 to 108 are integrated in the same appliance.
• FIG. 2 schematically illustrates a multimedia home network or appliance 200 comprising several sources.
• the network or device 200 includes in particular:
• the source 210 accepts as input Dext data 201 similar to the data 101 mentioned with reference to FIG. 1 and provides data with authorization Dp, Dr on outputs 202 to 204 (respectively 212 to 214).
• the receiver 206 accepts as input the data with Dp, Dr 202 and 212 authorizations.
• the receiver 207 accepts as input the data with permissions Dp, Dr 213. (Note that all the receivers and sources are not necessarily connected)
• the receiver 208 accepts as input the data with permissions Dp, Dr 204 and 214.
• the sources 210 to 211 may be of the same type as the source 110 (respectively the receivers 106 to 108) illustrated with reference to FIG. 1.
• the figure 3 describes a general diagram of a controller or watermarking control device 315 as it is installed in a source 110, 210 or 211.
• the tattoo controller 315 notably comprises:
• the input / output port 316 accepts as input multimedia data Dext 301 of the same type as the data 101 and 201 described with reference to FIGS. 1 and 2.
• the WD1 317 detection module (resp. WDn 318) accepts Din 304 data as input, detects the possible presence of a first (resp. A7 , th ) type of watermarking in a multimedia data sequence and, if necessary, extracted information from the tattoo.
• the WD1 317 detection module (resp. WDn 318) provides output
• the module for generating partial authorization F1 319 accepts the information H 305 (resp. In 306) as input and, from this information, generates a partial clearance authorization or inhibition.
• Fp1 (l1) (resp. Fpn (ln)) that it presents on an output 307 (resp. 309) or of recording Fr1 (l1) (resp. Frn (ln)) presented on an output 308 (resp. 310 ).
• the game is considered for example as an operation of representation or display of multimedia data.
• the Dplay 321 final game decision module accepts as input the partial game authorizations or inhibitions Fp1 (H) 307 to Fpn (ln) 309. It generates a final game authorization or inhibition signal Fp on an output 311 .
• the Drec 322 final recording decision module accepts as input the partial authorization or inhibition of recording Fr1 (l1) 308 to Frn (ln) 310. It generates a signal of authorization or final recording inhibition Fr on an exit 312.
• the game switch Splay 323 accepts as input the multimedia data Din 302 and the authorization or final game inhibition signal Fp 311. If the game authorization signal 311 is valid or in an equivalent manner if the game inhibition signal is invalid and only in these cases, the game switch 323 has on its output 313 a multimedia data sequence Dp, coming from the input sequence Din 302.
• the game switch Srec 324 accepts as input the multimedia data Din 303 and the signal for authorization or final inhibition of recording Fr 312. If the signal for final authorization of recording 312 is valid or in a way equivalent if the recording inhibition signal is invalid and only in these cases, the recording switch 324 has on its output 314 a multimedia data sequence Dr, coming from the input sequence Din 303.
• the add and update control module 330 includes a data entry 334.
• the control module 330 puts update this module by means of its output Cwd 331.
• the control module 330 updates this module by via its output Cf 332.
• the control module 330 updates this module via its output Cd 333.
• the control module 330 is responsible for adding additional modules to the watermarking controller 315 when the data 330 at input comprises data for adding the corresponding modules.
• the control module 330 can in particular add:
• control module 330 will make the necessary input / output connections according to the modules added.
• FIG. 4 describes a general block diagram of a first variant 415 of a tattoo controller as it is installed in a source 110, 210 or 211.
• the tattoo controller 415 comprises elements similar to those of FIG. 3 previously described which bear the same reference numbers and will not be described further.
• the watermarking controller 415 includes an analyzer 426 of external parameters. These external parameters may in particular be of the signature validation type and / or presence of encrypted data and / or presence of data identifying a recordable medium or not.
• This 426 analyzer takes into account:
• the analyzer 426 provides on an output 427 an analysis result A1.
• This output 427 is connected to an input of each of the partial authorization generation modules Fi 319 to 320 (/ ' being an integer between 1 and n).
• each of the modules Fi not only takes into account the information //, result of the operation carried out by the module Wdi but also a parameter external to the watermarking.
• FIG. 5 schematically illustrates a watermarking detector 500.
• This detector is integrated into the source 110 described with reference to FIG. 1 or to each of the sources 210 to 211 described with regard to FIG. 2.
• the detector 500 comprises, linked together by an address and data bus 503:
• DSP Digital Signal Processor
• the input / output port 501 is adapted to accept incoming signals representative of multimedia data coming from an external transmitter not shown, such as in particular a television program broadcaster, a DVD player, an audio CD player. or CD-ROM.
• the port 501 is in particular adapted to format these signals in the form of binary sequences usable by the processor 502.
• the port 501 is adapted to accept outgoing authorized binary sequences and to put them in the form of outgoing signals representative of multimedia data and intended for a receiver as described with reference to FIGS. 1 or 2.
• the word “register” used in the description designates, in each of the memories 504 and 505, both a low-capacity memory area (some binary data) and a high-capacity memory area (allowing storage an entire program or an entire multimedia data sequence).
• the random access memory 505 stores data, variables and intermediate processing results, in memory registers bearing in the description, the same names as the data whose values they store.
• the RAM 505 includes in particular:
• the “data” register 520 further comprises external parameters and the “res” register 521 retains A1.
• the non-volatile memory 504 stores in registers which, for convenience, have the same names as the data they store:
• the parameters 510 of the different tattoos used by the different modules described with reference to FIGS. 3 and 4 such as in particular the n detection modules WD1 317 to WDn 318, the n modules for generating partial authorizations F1 319 to
• Drec 322 the two switches SPlay 323 and Srec 324 and the add and update control module 330 and, if present, the analyzer module 426.
• the non-volatile memory 504 is preferably of the type
• the external parameters come from an external entity which is not shown.
• This entity could for example be a means of signature validation and / or detection of the presence of encrypted data and / or detection of the presence of data identifying a recordable medium or not.
• FIG. 6 which shows the operation of a watermarking control device such as that included in the electronic device illustrated in FIG. 5, it is observed that after an initialization operation 600 during which the registers of the RAM 505 are initialized, during a waiting operation 601 the processor 502 waits to receive then receives a sequence of multimedia data.
• the authorization or partial inhibition to play Fpi (li) is a Boolean variable which indicates whether the multimedia data sequence considered can be played, i.e. in particular if it can be displayed (if it is a question of 'an image) or broadcast.
• Fpi (li) will be true if the game is legal or if no tattoo has been detected by WDi. In the second variant, Fpi (li) will be true if the game is legal and if a tattoo has been detected by WDi.
• the processor 502 updates the authorization or partial inhibition to copy Fri (li) for each type of watermarking likely to be detected as a function of the type of information extracted // ' : Fri (li) is a boolean variable which indicates whether the multimedia data sequence in question can be copied. Fri (li) will be true if registration is legal or if no tattoo has been detected by WDi. In the third variant, Fri (li) will be true if the registration is legal and if a tattoo has been detected by WDi
• the processor 502 generates the final authorizations or inhibitions Fp and Fr.
• the final authorization or inhibition to play Fp will in particular be obtained by means of a Boolean operation performed on all of the partial authorizations or inhibitions to play.
• this function will be of the logical “and” type denoted “&&” in the following.
• Fp Fp1 (H) && Fp2 (l2) && .... && Fpn (ln).
• this function will be of the logical “and” type denoted “&&” in the following.
• Fr Fr1 (l1) && Fr2 (l2) && .... && Fm (in).
• any other type of Boolean function can be used.
• Fr Fr1 (l1) OUFr2 (l2) OR .... OUFrn (ln).
• the processor 502 checks whether the final authorization to play Fp is valid. If so, during a data transmission operation for game 606, it authorizes the transmission and transmits the data Dp intended to be played.
• the processor 502 checks whether the final authorization to record Fr is valid. If so, during a data transmission operation for recording 608, it authorizes the transmission and transmits the data Dr intended to be recorded.
• FIG 7 shows the operation of a tattoo control device such as that included in the electronic device illustrated in Figure 5, according to the first variant of the invention.
• FIG. 7 comprises operations similar to those of FIG. 6 previously described which bear the same reference numbers and will not be described further.
• an analysis of external parameters is carried out. It will be recalled that these external parameters may in particular be of the signature validation type and / or the presence of encrypted data and / or the presence of data identifying a medium. recordable or not.
• the processor 502 takes into account the result of this analysis to generate an analysis result information A.
• the authorization or partial inhibition operation 604 described above can also take into account the result of A1 analysis for example by performing a Boolean operation between part of the information // ' and the A1 analysis result.
• Fri (li) will prohibit copying whatever the information /.
• FIG. 8 details the detection operation 602 mentioned with reference to FIGS. 6 and 7 and symbolized by dotted lines in FIG. 8.
• a counter / is initialized to 0.
• the processor 502 attempts to detect in the data sequence 520 in the RAM 505 the presence of a tattoo / erne type known to him according to the parameters 510 present in the ROM 504. If the result of the test 802 is negative, that is to say if no watermarking of the type f TM is detected, during an update operation 803, the processor 502 updates the information // ' to indicate then that no tattoo of the? me type was not detected.
• the processor 502 extracts the watermarking information of the / ⁇ type according to the parameters 510 present in the ROM 504 and sets to update this information in //.
• the processor 502 After one of the operations 803 or 804, during a test 805, the processor 502 checks whether the counter / has reached the value of n kept in memory. If / ' and n are equal, operation 602 is terminated. Otherwise, the increment operation 801 is repeated.
• FIG. 9 describes a function for updating the parameters or adding (also called implantation) one or more modules such as for example a tattoo detection module, an analyzer, a module for generating authorizations or d 'partial inhibitions, a module for generating authorizations or final inhibitions, a switch.
• a tattoo detection module for example a tattoo detection module, an analyzer, a module for generating authorizations or d 'partial inhibitions, a module for generating authorizations or final inhibitions, a switch.
• the processor 502 is put on hold for update or addition data.
• These data pass through the interface 501. They preferentially use the same channel as the multimedia data but may come from various origins according to procedures well known to those skilled in the art of data downloads.
• the processor 502 checks whether the data corresponds to a simple update of one or more modules already installed such as a module of watermarking detection WDi and / or a module for generating partial authorizations Fi and / or a module for final decisions Dp or Dr and or a switch Sp or Sr.
• the processor 502 updates the module or modules to which the update data correspond.
• the processor 502 checks whether the data received corresponds to an addition function.
• the processor 502 adds the module or modules to which the update data correspond as well as the new connections between modules required. Note that if a new tattoo detection module
• WD (n + 1) is added, this implies the installation of a new authorization generation or partial inhibition module F (n + 1), an update of the final authorization modules and the establishment of connections between input / output port 316 and WD (n + 1), between WD (n + 1) and F (n + 1), between F (n + 1), DPlay and DRec and between if is present the analyzer 426 and F (n + 1).
• the person skilled in the art may make any variant in the definition of the types of operations liable to be authorized by a watermarking of data or external parameters, in the very definition of these external parameters and in the operations making it possible to obtain final authorizations or inhibitions from partial authorizations or inhibitions.
• the invention is not limited to simple authorizations or inhibitions of reading or recording but can be applied by particularizing certain types of reading or recording. It should also be noted that the invention can be applied to authorizations or inhibitions of any type of processing on multimedia data such as filtering, modifications of the original data sequences, extraction of part of the data sequences. It should also be noted that the invention relates to digital multimedia and / or analog data.
• the invention is not limited to a purely material installation but that it can also be implemented in the form of a sequence of instructions of a computer program or any form mixing a material part and a part software.
• the corresponding sequence of instructions may be stored in a removable storage means (such as for example a floppy disk, a CD-ROM or a DVD-ROM) or no, this storage means being partially or totally readable by a computer or a microprocessor.

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• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Editing Of Facsimile Originals (AREA)
• Storage Device Security (AREA)
• Image Processing (AREA)
• Television Systems (AREA)
• Signal Processing For Digital Recording And Reproducing (AREA)
• Television Signal Processing For Recording (AREA)

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