CN105100959A - Evidence-obtaining marking method and device and digital home theater - Google Patents
Evidence-obtaining marking method and device and digital home theater Download PDFInfo
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Abstract
The invention provides an evidence-obtaining marking method based on an invisible information embedding module arranged on a digital home theater receiving terminal server. The method comprises that the invisible information embedding module acquires a digital movie video and embeds invisible evidence obtaining mark information in the digital movie video in order to provide a basis for pirate fountainhead discrimination. As a result, a pirate fountainhead can be found out according to the invisible evidence obtaining mark information so that a basis is provided for a digital movie copyright party offering the digital home theater the service to maintain the benefit of the digital movie copyright party.
Description
Technical field
The application relates to digital cinema technology field, particularly a kind of forensic marking method, device and digital home cinema.
Background technology
Along with the raising of living standard and science and technology, increasing family brings into use digital home cinema, the home-confined world of wonders can enjoyed digital movie and present.
Meanwhile produced problem is, use the user of digital home cinema may carry out illicit distributions by modes such as recording, shooting, downloads to the digital movie watched, the interests of behavior to digital filmization power side of this piracy cause infringement.Therefore, when pirate phenomenon occurs, search the strong demand that pirate source is copyright side in time, accurately.
But at present, when the domestic digital movie play by digital home cinema occurs pirate, but can not find pirate source, cause digital movie copyright side cannot get the foundation safeguarding number one.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of forensic marking method, device and digital home cinema, pirate source is found according to invisible forensic marking information to reach, thus for providing the digital movie copyright side of service to safeguard that number one provides the object of foundation to digital home cinema, technical scheme is as follows:
A kind of forensic marking method, based on the invisible information merge module that digital home cinema receiving terminal server installs additional, described method comprises:
Described invisible information merge module obtains digital film video; And,
Invisible forensic marking information is embedded, for differentiating that pirate source provides evidence obtaining foundation in described digital movie video.
Preferably, the described process embedding invisible label information in described digital movie video, comprising:
Obtain copyright information and the sound picture metadata information of described digital movie video, and described copyright information and sound picture metadata information are converted to digital watermarking;
Described digital movie video is decoded, and embed described digital watermarking in decoded digital movie video.
Preferably, described copyright information at least comprises: the provider of film service or operator's numbering, subscriber information numbering and reproduction time;
Described sound picture metadata information at least comprises: film video format, film video resolution, film video code rate, film audio format, film audio code rate, film audio track information, reservation position and data check value.
Preferably, the described process embedding invisible forensic marking information in described digital movie video, comprising:
Described digital watermarking is embedded to the I frame in described digital movie compressed video stream.
Preferably, described digital movie video is being decoded, and embed described digital watermarking in decoded digital movie video after, is also comprising:
To the digital movie video embedded after described digital watermarking, carry out watermark extracting.
Preferably, described digital movie video comprises: H.264 compressed format be and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p;
Or compressed format is MPEG-2 and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p.
A kind of forensic mark device, be installed in digital home cinema receiving terminal server, described forensic mark device comprises:
Acquisition module, for obtaining digital film video;
Merge module, for embedding invisible forensic marking information in described digital movie video, for differentiating that pirate source provides evidence obtaining foundation.
Preferably, described merge module comprises:
Acquiring unit, for obtaining copyright information and the sound picture metadata information of described digital movie video;
Converting unit, for being converted to digital watermarking by described copyright information and sound picture metadata information;
Decoding unit, for decoding to described digital movie video;
Embedded unit, for embedding described digital watermarking in decoded digital movie video.
A kind of digital home cinema, comprises the digital home cinema receiving terminal server, projecting apparatus and the movie screen that add described forensic mark device.
A kind of digital home cinema, comprises the digital home cinema receiving terminal server and television set that add described forensic mark device.
Compared with prior art, the beneficial effect of the application is:
In this application, by installing invisible information merge module additional at digital home cinema receiving terminal server, digital film video is obtained by invisible information merge module, then in described digital movie video, invisible forensic marking information is embedded, containing invisible forensic marking information in the film video making digital home cinema play, when user is again by recording, shooting, when the modes such as download carry out illicit distributions (namely occurring pirate phenomenon) to film, pirate source can be found according to invisible forensic marking information, thus for providing the digital movie copyright side of service to safeguard that number one provides foundation to digital home cinema.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of the forensic marking method that the application provides;
Fig. 2 is a kind of sub-process figure of the forensic marking method that the application provides;
Fig. 3 is the another kind of flow chart of the forensic marking method that the application provides;
Fig. 4 is a kind of structural representation of the forensic mark device that the application provides;
Fig. 5 is a kind of structural representation of the merge module that the application provides;
Fig. 6 is a kind of structural representation of the digital home cinema that the application provides;
Fig. 7 is the another kind of structural representation of the digital home cinema that the application provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Before the forensic marking method that execution the application provides, need to install invisible information merge module additional in digital home cinema receiving terminal server.Wherein, digital home cinema receiving terminal server is a part for digital home cinema.
Embodiment one
Refer to Fig. 1, it illustrates a kind of flow chart of the forensic marking method that the application provides, can comprise the following steps:
Step S11: described invisible information merge module obtains digital film video.
In the present embodiment, invisible information merge module obtains the digital movie video that belonging to invisible information merge module, digital home cinema is to be played.
In the present embodiment, the digital movie video that invisible information merge module gets is specifically as follows: H.264 compressed format be and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p;
Or compressed format is MPEG-2 and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p.
Step S12: described invisible information merge module embeds invisible forensic marking information in described digital movie video, for differentiating that pirate source provides evidence obtaining foundation.
After embed invisible forensic marking information in described digital movie video, obtain the digital movie video embedding invisible forensic marking information, the front end of digital home cinema belonging to the digital movie video frequency output that embedded in invisible forensic marking information to described invisible information merge module is play.When occurring that user carries out illicit distributions by modes such as recording, shooting, downloads to the digital movie that front end is play, according to the invisible forensic marking information in digital movie, pirate source can be found.
The front end of digital home cinema is specially projecting apparatus and the movie screen corresponding with described projecting apparatus;
Or, television set.
In this application, by installing invisible information merge module additional at digital home cinema receiving terminal server, digital film video is obtained by invisible information merge module, then in described digital movie video, invisible forensic marking information is embedded, containing invisible forensic marking information in the film video making digital home cinema play, when user is again by recording, shooting, when the modes such as download carry out illicit distributions (namely occurring pirate phenomenon) to film, pirate source can be found according to invisible forensic marking information, thus for providing the digital movie copyright side of service to safeguard that number one provides foundation to digital home cinema.
Further, digital home cinema belongs to civilian goods equipment, and user base number is large, is domestic independent research product, and independent intellectual property right is therefore lower at the cost of the digital home cinema receiving terminal server integrated invisible information merge module of digital home cinema.
In the present embodiment, H.264 invisible information merge module can be to compressed format specifically and resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video embeds invisible forensic marking information.
Certainly, invisible information merge module also can be MPEG-2 to compressed format and resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video embeds invisible forensic marking information.
In the present embodiment, the physical aspect of invisible information merge module is embedded IC board, and core calculations unit is FPGA processor, and the embedding of invisible forensic marking information has been calculated by FPGA.The acquisition of digital movie video is completed by the video input physical interface IP of embedded IC board.The digital movie video that embedded in invisible forensic marking information is outputted to the front end of digital home cinema belonging to invisible information merge module by video frequency output physical interface HDMI.
The concrete workflow of embedded IC board is:
Steps A 11: obtain digital film video by video input network physical interface, and transfer to FPGA (Field-ProgrammableGateArray, field programmable gate array) processor.
Steps A 12:FPGA processor calculates digital film video, embeds invisible forensic marking information.
Concrete, H.264 FPGA processor to compressed format is and resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video calculates.
Or FPGA processor is MPEG-2 to compressed format and resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video calculates.
Steps A 13: the front end being exported to digital home cinema belonging to described invisible information merge module by video frequency output HDMI (HDMI (High Definition Multimedia Interface), HighDefinitionMultimediaInterface).
Embodiment two
In the present embodiment, show the detailed process that described invisible information merge module embeds invisible forensic marking information in described digital movie video, refer to Fig. 2, it illustrates a kind of sub-process figure of the forensic marking method that the application provides, can comprise the following steps:
Step S21: invisible information merge module obtains copyright information and the sound picture metadata information of described digital movie video, and described copyright information and described sound picture metadata information are converted to digital watermarking.
In the present embodiment, invisible information merge module obtains copyright information and the sound picture metadata information of digital film video, and described copyright information and sound picture metadata information are converted to digital watermarking.
In the present embodiment, described copyright information at least comprises: the provider of film service or operator's numbering, subscriber information numbering and reproduction time.
Described sound picture metadata information at least comprises: film video format, film video resolution, film video code rate, film audio format, film audio code rate, film audio track information, reservation position and data check value.
The information capacity size of the specifying information included by described copyright information and the specifying information included by described sound picture metadata information can see table 1.
Table 1
Described copyright information and described sound picture metadata information are converted to digital watermarking, digital watermark data form can but to be not limited in random sequence, pseudo random sequence, character, grid, bianry image, gray level image, coloured image and 3D rendering any one.
Described copyright information and described sound picture metadata information are converted to digital watermarking specifically to be realized by pseudorandom number generator; Or, realized by the watermark generation method based on chaos.Wherein, the watermark generation method based on chaos has good confidential nature.
Step S22: invisible information merge module is decoded to described digital movie video, and described digital watermarking is embedded in decoded digital movie video.
Because the video data volume usually first carries out compressed encoding to video greatly, therefore in storage, propagation.Invisible information merge module, after getting digital movie video, is decoded to the digital movie video got, and then in decoded digital movie video, embeds described digital watermarking.
From table 1, the capacity of the digital watermarking embedded in digital movie video is 130 bits, and watermark information capacity is high.
In the present embodiment, invisible information merge module can to compressed format be H.264, resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video is decoded.
Certainly, invisible information merge module can also be MPEG-2 to compressed format, resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video is decoded.
Certainly, after decoded digital movie video embed digital watermark, by decoded embedded in the digital movie video frequency output of digital watermarking before, need to encode to the decoded digital movie video that embedded in digital watermarking.Wherein, the decoding that the digital movie video of invisible information merge module to which kind of compressed format, which kind of resolution carries out, compressed format corresponding time namely to decode and resolution are encoded to digital film video.
Concrete, invisible information merge module can to compressed format be H.264, resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video is encoded.
Certainly, invisible information merge module can also be MPEG-2 to compressed format, resolution is that in 4k, 2k, 1080P, 1080i, 720p, any one digital movie video is encoded.
Before embed described digital watermarking in decoded digital movie video, the digital watermarking that double secret key can be used to embed is encrypted, and ensure in extreme circumstances, if watermark information is extracted, digital watermark information is not exposed.
Concrete, the digital watermarking that a double secret key can be used to embed is encrypted, and the combination of multiple key can certainly be used to be encrypted digital watermarking, realizes repeatedly encrypting.
In the present embodiment, due to for each family, subscriber information numbering in the copyright information of described digital movie video is unique, therefore digital movie video is when being sent to digital home cinema, invisible merge module in digital home cinema receiving terminal server is also unique to the digital watermarking that described digital movie video embeds, therefore, when occurring pirate, by extracting the digital watermarking in digital movie video, pirate source can be found accurately and rapidly.
Embed described digital watermarking in decoded digital movie video before, can select embedding point in advance, in the present embodiment, as follows about the particular content embedding point selection:
The I frame in film video compressed bit stream is selected to carry out the embedding of watermark.Due in compressed bit stream, I frame is comparatively independent, and its each pixel take part in coding, and the reconstruction of P frame and B two field picture also all be unable to do without I frame data, so generally directly can not delete I frame in H.264 code stream or MPEG-2 code stream, it is more sane to attack some frame deletions and frame-skip; Simultaneously because P frame and B frame are predicted by I frame, so the watermark energy of adding in I frame is gone by inevitably extending in P frame and B frame to, therefore also there is certain robustness for some with the attack that P frame (or the B frame) data of rebuilding replace former I frame data.
The DC component DC coefficient in I two field picture DCT (DiscreteCosineTransform, discrete cosine transform) coefficient is selected to embed.Because compressed bit stream is brightness and colourity separately coding to each macro block, consider that human visual system is more more responsive than colourity change to brightness change, although so luminance factor is quantitatively more more than chromaticity coefficent, select on chroma DC coefficients, to add digital watermarking, to avoid producing large impact to visual effect.Watermarked rear mute quality and audio quality can not affect normal listen to be watched, and sound picture metadata information can not change.
In the present embodiment, invisible information merge module can embed described digital watermarking according to following steps in decoded digital movie video:
Steps A 21: digital movie video compression video flowing is read in step-by-step;
Steps A 22: embedding number of times mark is set to 0 when reading I frame header information.
Steps A 23: when picture format be I frame and embed number of times be less than 127 time, according to intra-frame macro block coding/decoding method, VLC decoding is carried out to the chrominance block in the macro block read, obtains chroma DC coefficients v
iwith chrominance AC coefficients ac
[1-63].
Steps A 24: the quadratic sum calculating chrominance AC coefficients:
Steps A 25: if Eac is more than or equal to the threshold value of setting, carries out a digital watermark embedding, and embedding number of times is added 1; If do not meet embedding condition, then to next chrominance block carry out steps A 23 to steps A 25 repeat judge.
The embedding grammar of watermark is: v
i'=v
i+ aw
i=v
i+ a
i.b
kp
i.
Wherein: v
i' represent the chroma DC coefficients after embed digital watermark; v
ifor former chroma DC coefficients; b
kfor a kth digital watermark bit, value is-1 or 1; a
ifor the intensity of embed digital watermark, p
ifor the corresponding positions of watermark sequence.
Steps A 26: VLC coding is carried out to the chroma DC coefficients after embed digital watermark, and replace original chroma DC coefficients VLC and encode, the VLC coding of alternating current component AC coefficient then remains unchanged.
Steps A 27: repeat steps A 21 to steps A 26, until digital watermark embedding is complete.
Further, based on test, execution above-mentioned steps can reach every 10 seconds, and 130 Bit datas embed.
In the present embodiment, the digital watermarking embedded in decoded digital movie video only comprises the digital watermark embedding of copyright information compared to prior art, add sound picture metadata information, makes digital watermarking capacity large.And in the application, as shown in Table 1, the capacity of each digital watermarking of embedding is 130 bits, and watermark information capacity is high.
Adopt the technology of the embed digital watermark of steps A 21-steps A 27 for be the video that digital home cinema is play, because the digital home cinema receiving terminal server provided in the application supports that H.264 compressed format be and resolution is 4k, 2k, 1080P, 1080i, in 720p any one digital movie video and compressed format is MPEG-2 and resolution is 4k, 2k, 1080P, 1080i, any one digital movie video in 720p, therefore for 1080P, 1080i, the video that the resolution such as 720p are not high, still can embed digital watermark, to ensure from 1080P, 1080i, digital watermark information is extracted in the video that the resolution such as 720p are not high, compared in prior art only to the technology of the video embed digital watermark of 4k and 2k, improve watermark recall rate.
Because digital home cinema receiving terminal server has carried out embedding algorithm to digital film video, therefore, for the shooting of the video screen of digital home cinema, the shooting of recording the movie screen of attack or digital home cinema, recording attack provide evidence obtaining foundation.
In this application, the digital watermarking embedded in decoded digital movie video is no longer only as the foundation of searching pirate source, as the foundation of the essential information of digital movie video belonging to the described digital watermarking of understanding, can also apply for other and data message basis be provided.Such as, according to the film video resolution in described digital watermarking, the distribution channel of the digital movie video of different resolution can be differentiated.
In the present embodiment, also show the another kind of forensic marking method of the forensic marking method that the application provides, refer to Fig. 3, Fig. 3 shows the another kind of flow chart of the forensic marking method that the application provides, and can comprise the following steps:
Step S31: invisible information merge module obtains copyright information and the sound picture metadata information of described digital movie video, and described copyright information and described sound picture metadata information are converted to digital watermarking.
Step S32: invisible information merge module is decoded to described digital movie video, and described digital watermarking is embedded in decoded digital movie video.
Step S21 in forensic marking method shown in step S31 with step S32 and Fig. 2 is identical with step S22, does not repeat them here.
Step S33: external detection equipment, to the digital movie video embedded after described digital watermarking, carries out watermark extracting.
For the above-mentioned video that embedded in digital watermarking, the process of carrying out watermark extracting is specifically as follows:
When having initial carrier data I, adopt
formula carries out watermark detection.
Or, when having original watermark W, adopt
formula carries out watermark detection.
Or, when there is no raw information, adopt
formula carries out watermark detection.
Wherein,
represent and estimate watermark, D is watermark detection algorithms,
represent under attack in transmitting procedure after watermark carrier data.The means detecting watermark can be divided into two kinds: one to be when there being raw information, can do the extraction or relevance verification that embed signal; Two is do not having in raw information situation, must do full search or Testing Statistical Hypotheses etc. to embedding information.If signal is random signal or pseudo-random signal, prove that detection signal be the method for watermark signal is exactly generally do similarity examination.The general formula of watermark similarity examination is:
or
Its
represent and estimate watermark, W represents original watermark, and Sim represents the similarity of unlike signal.
In this application, for the digital watermark embed process of steps A 21 to steps A 27, this application provides corresponding digital watermark detecting process, be specially:
Steps A 31: watermarked compressing video frequency flow is read in step-by-step.
Steps A 32: number of times mark is set to 0 when reading I frame header information.
Steps A 33: when picture format is I frame and number of times mark is less than 127, according to intra-frame macro block coding/decoding method, VLC decoding is carried out to the chrominance block in the macro block read, obtain chroma DC coefficients v "
iwith chrominance AC coefficients ac
[1-63].
Steps A 34: the quadratic sum calculating chrominance AC coefficients:
Steps A 35: if Eac is more than or equal to the threshold value of setting, then add 1 by number of times mark, and calculate s
i=v "
ip
i.If do not satisfied condition, then to next chrominance block carry out steps A 33 to steps A 35 repeat judge.
Wherein, p
ifor the corresponding positions of watermark sequence, s
ifor the watermark of extracting.
Steps A 36: repeat steps A 31 to steps A 35, until watermark information extracts complete.
In this application, perform step S31 to step S36 and carry out watermark detection, repeat to extract to watermark information, and by multiple watermark sequence bit-wise addition extracted, if a certain position watermark bit sum is greater than 0, represent that this watermark bit is final 1, otherwise be-1, Corpus--based Method, repeats the accuracy rate that extraction can improve watermark extracting (namely detecting).Based on the testing mechanism of step S31 to step S36, watermark detection success rate can reach more than 90%.
For aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the application is not by the restriction of described sequence of movement, because according to the application, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the application is necessary.
Embodiment three
This application provides a kind of forensic mark device, refer to Fig. 4, Fig. 4 shows a kind of structural representation of the forensic mark device that the application provides, and forensic mark device comprises: acquisition module 41 and merge module 42.
Wherein, the forensic mark device described in the present embodiment is the invisible information merge module in said method embodiment.Forensic mark device is specifically realized by embedded IC board.
Acquisition module 41, for obtaining digital film video.
Merge module 42, for embedding invisible forensic marking information in described digital movie video, for differentiating that pirate source provides evidence obtaining foundation.
The concrete structure of merge module 42 can show a kind of structural representation of the merge module that the application provides see Fig. 5, Fig. 5, merge module 42 comprises: acquiring unit 51, converting unit 52, decoding unit 53 and embedded unit 54.
Acquiring unit 51, for obtaining copyright information and the sound picture metadata information of described digital movie video.
The copyright information that acquiring unit 51 gets at least comprises provider or operator's numbering, subscriber information numbering and the reproduction time of film service.
The sound picture metadata information that acquiring unit 51 gets at least comprises: film video format, film video resolution, film video code rate, film audio format, film audio code rate, film audio track information, reservation position and data check value.
Converting unit 52, for being converted to digital watermarking by described copyright information and sound picture metadata information.
Decoding unit 53, for decoding to described digital movie video.
Embedded unit 54, for embedding described digital watermarking in decoded digital movie video.
Present invention also provides a kind of digital home cinema, refer to Fig. 6, it illustrates a kind of structural representation of the digital home cinema that the application provides, digital home cinema comprises: digital home cinema receiving terminal server 61, projecting apparatus 62 and movie screen 63.
Digital home cinema receiving terminal server 61 has installed above-mentioned forensic mark device additional.
Present invention also provides another digital home cinema, refer to Fig. 7, it illustrates the another kind of structural representation of the digital home cinema that the application provides, digital home cinema comprises: digital home cinema receiving terminal server 71 and television set 72.
Digital home cinema receiving terminal server 71 has installed above-mentioned forensic mark device additional.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.For device class embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
For convenience of description, various unit is divided into describe respectively with function when describing above device.Certainly, the function of each unit can be realized in same or multiple software and/or hardware when implementing the application.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add required general hardware platform by software and realizes.Based on such understanding, the technical scheme of the application can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the application or embodiment.
Above a kind of forensic marking method, device and digital home cinema that the application provides are described in detail, apply specific case herein to set forth the principle of the application and execution mode, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. a forensic marking method, is characterized in that, based on the invisible information merge module that digital home cinema receiving terminal server installs additional, described method comprises:
Described invisible information merge module obtains digital film video; And,
Invisible forensic marking information is embedded, for differentiating that pirate source provides evidence obtaining foundation in described digital movie video.
2. method according to claim 1, is characterized in that, the described process embedding invisible label information in described digital movie video, comprising:
Obtain copyright information and the sound picture metadata information of described digital movie video, and described copyright information and sound picture metadata information are converted to digital watermarking;
Described digital movie video is decoded, and embed described digital watermarking in decoded digital movie video.
3. method according to claim 2, is characterized in that, described copyright information at least comprises: the provider of film service or operator's numbering, subscriber information numbering and reproduction time;
Described sound picture metadata information at least comprises: film video format, film video resolution, film video code rate, film audio format, film audio code rate, film audio track information, reservation position and data check value.
4. method according to claim 2, is characterized in that, the described process embedding invisible forensic marking information in described digital movie video, comprising:
Described digital watermarking is embedded to the I frame in described digital movie compressed video stream.
5. method according to claim 2, is characterized in that, is decoding to described digital movie video, and embed described digital watermarking in decoded digital movie video after, also comprises:
To the digital movie video embedded after described digital watermarking, carry out watermark extracting.
6. the method according to claim 1-5 any one, is characterized in that, described digital movie video comprises: H.264 compressed format be and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p;
Or compressed format is MPEG-2 and resolution is any one digital movie video in 4k, 2k, 1080P, 1080i, 720p.
7. a forensic mark device, is characterized in that, is installed in digital home cinema receiving terminal server, and described forensic mark device comprises:
Acquisition module, for obtaining digital film video;
Merge module, for embedding invisible forensic marking information in described digital movie video, for differentiating that pirate source provides evidence obtaining foundation.
8. forensic mark device according to claim 7, is characterized in that, described merge module comprises:
Acquiring unit, for obtaining copyright information and the sound picture metadata information of described digital movie video;
Converting unit, for being converted to digital watermarking by described copyright information and sound picture metadata information;
Decoding unit, for decoding to described digital movie video;
Embedded unit, for embedding described digital watermarking in decoded digital movie video.
9. a digital home cinema, is characterized in that, comprises the digital home cinema receiving terminal server, projecting apparatus and the movie screen that add described forensic mark device.
10. a digital home cinema, is characterized in that, comprises the digital home cinema receiving terminal server and television set that add described forensic mark device.
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