CN102402542A - Video tagging method and system - Google Patents

Video tagging method and system Download PDF

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Publication number
CN102402542A
CN102402542A CN2010102825392A CN201010282539A CN102402542A CN 102402542 A CN102402542 A CN 102402542A CN 2010102825392 A CN2010102825392 A CN 2010102825392A CN 201010282539 A CN201010282539 A CN 201010282539A CN 102402542 A CN102402542 A CN 102402542A
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China
Prior art keywords
file
video
video file
watermark information
label data
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CN2010102825392A
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Chinese (zh)
Inventor
李大龙
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Tencent Technology Shenzhen Co Ltd
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Tencent Technology Shenzhen Co Ltd
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Priority to CN2010102825392A priority Critical patent/CN102402542A/en
Publication of CN102402542A publication Critical patent/CN102402542A/en
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Abstract

The invention provides a video tagging method and system. The method comprises the steps of: establishing a congruent relationship between tag data and a file identifier of a video file in advance; and processing the field identifier of the video file into watermark information and embedding the watermark information into the video file, and then releasing the video file. The method provided by the invention is completely free from the influence of a video file format, the damages to the tag data in the network propagation and secondary processing processes of the video file are effectively avoided, thus, a high-efficiency and robust video tagging scheme is provided, and the possibility is provided for mass video indexing and fast retrieve. Meanwhile, the user can also access stable and correct tag data to master more information besides film content, and thus, the multiaspect multimedia entertainment requirements of a user are met, and the user experience is improved.

Description

A kind of video tab method and system
Technical field
The present invention relates to the multimedia treatment technology, refer to a kind of video tab method and system especially.
Background technology
Along with popularizing of internet, it is more and more abundanter that the user obtains the channel of video or film.In the face of magnanimity information, to the interested video key word of user oneself, seek the film that satisfies own demand through search engine, be most of Internet user's behavior.Further; In order to improve search precision and efficient; Need carry out data directory to the video file of magnanimity handles; Be about to film information, carry out relatedly such as information such as director, protagonist, style, duration and video file, the key word that then user is provided matees in these information and the video file that returns Satisfying Matching Conditions supplies user's selection.Aforesaid film information such as director, protagonist, style, duration etc. are called the label data of video.
The video tab data have comprised the information of video file self, generally include: the director of film, creator in chief, publisher, age, duration, style, classification and image resolution ratio, aspect ratio, video code rate etc.The existence of label data can be applied to: the many view classifications of media file, video database, video search service etc.
From above-mentioned user's request and application scenarios, at present industry defined ID3 ( Http:// www.id3.org/) standard is as the label data form of MP3 music file, has benefited from the most shares of MP3 format in music market, the ID3 standard has also obtained the large tracts of land promotion and application.
But different with music market, video format is of a great variety, and all released one after another oneself media file format such as all big enterprises such as Microsoft, RealNetworks, apple still has no a kind of form can occupy the principal market share fully.So the label data agreement unified for the video file definition is comparatively difficult.On the other hand; Along with the more and more polynary change of multimedia digital product; The user can make it to adapt to the hardware product of oneself to existing video file through processing such as format conversion, second-compressed; For example: some mobile phone is only supported the video file of MP4 form, so the user need can watch on mobile phone for corresponding MP4 file existing Audio Video Interleaved form (AVI, Audio VideoInterleaved) formatted file transcoding.Like this, even source document has comprised certain label data, after through processing such as format conversion, label data information also can be lost along with the change of file layout.
With the QuickTime file is example, the QuickTime file layout is that Apple is the tissue, storage of its multi-medium data and the file/Container Format of issue definition, and its body design theory is based on the metadata structure of a kind of Atom by name.Wherein, User Data Atoms is specifically designed to definition and deposits label data; In the Atom structure, user data tabulation (User data list) is used for concentrating describes the information relevant with film, promptly in the QuickTime file; Adopt User data list to carry out video tab, in table 1, provided the partial key definition in detail.
Table 1
Visible from table 1, the QuickTime file can comprise the label data of almost containing film each side information, but nonetheless, still there is following problem in this video tab mode:
Label data information shown in the table 1 is as user data (User data); Only belong to the QuickTime optional data; It is the normal the operation whether existence of User data can't influence QuickTime file player or related application; So, do not exist mandatory mechanism to guarantee the existence and the correctness of above-mentioned label data;
After QuickTime gets into the consumer market; The user carries out operations such as format conversion, second-compressed issue probably to it; Owing in the file layout of other manufacturer's definition above-mentioned data area might not be arranged also; Perhaps the label data project of definition can't be corresponding one by one with the definition among the QuickTime, loses easily so handle the label data shown in the table 1 of back through multimedias such as similar format conversion.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of video tab method and system, can avoid video file broken ring to label data in Internet communication and dual-spectrum process effectively, and a kind of video tab scheme of efficient, robustness is provided.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of video tab method comprises: the corresponding relation of setting up the file identification of label data and video file in advance;
After the file identification of video file is treated to watermark information and embeds in the corresponding video file, issue this video file.
This method also comprises: from the video file of said issue, obtain watermark information, and obtain label data through the inquiry of the file identification in the watermark information.
Saidly from the video file of issue, obtain before the watermark information, this method also comprises: the said video file that receives is carried out the user side multimedia handle.
The corresponding relation of the file identification of said label data and video file is stored in the film label information database.
The file identification of said video file is and video file characteristic of correspondence sign indicating number.
The file identification of said video file is the character string that the plaintext form exists;
Said file identification with video file is treated to watermark information and comprises: said file identification is carried out Signal Pretreatment to form the watermark information that is fit to watermarking algorithm.
Said Signal Pretreatment comprises: said character string is converted into 0/1 bit stream or uses pseudo-random sequence that said character string is carried out spread spectrum or used fault-tolerant encoding that said character string is added redundant information.
A kind of video tab system comprises label data and representation of file generation module, watermark generation module and merge module at least, wherein,
Label data and file identification generation module are used for the label data of recording of video file and the corresponding relation between file identification;
Watermark generation module is used for the file identification of video file is treated to watermark information;
Merge module is used for the watermark information that generates is embedded into video file, and the video file of embed watermark information is issued.
This system also comprises: watermark extracting module and label data acquisition module, wherein,
The watermark extracting module is used to extract the watermark information that embeds the video file that receives;
The label data acquisition module is used for through inquiry tag data and file identification generation module, obtaining the label data of the corresponding video file of this document sign from the watermark information extraction document sign that obtains.
This system also comprises the multimedia processing module, is used for that the video file that receives is carried out the user side multimedia and handles, and the processed video file is exported to said watermark extracting module.
Can find out from the technical scheme that the invention described above provides; The inventive method is before the video file issue; The video tab data are recorded in the server database with a corresponding unique file identification, again video file are carried out Web publishing and propagation after simultaneously this document sign being embedded into video file with the mode of digital watermarking.Because digital watermarking is after embedding video file; Become the part of video data; Therefore, the instant video file is handled through complicated multimedia, after format conversion, second-compressed; Still can be through extracting the file identification that video watermark obtain this video file, and finally arrived the label data that sign is therewith bound mutually through the querying server database access.
The inventive method does not receive the influence of video file format fully; Avoided video file broken ring to label data in Internet communication and dual-spectrum process effectively; Thereby a kind of video tab scheme of efficient, robustness is provided, for magnanimity video index and retrieval fast provide maybe.Simultaneously, that the user also can have access to is stable, label data accurately, grasps more information except that substance film, thereby has satisfied the multi-faceted multimedia recreation demand of user, has improved user experience.
Description of drawings
Fig. 1 is the synoptic diagram of the general implementation model of existing digital watermarking;
Fig. 2 is the process flow diagram of video tab method of the present invention;
Fig. 3 is the composition synoptic diagram of video tab of the present invention system.
Embodiment
At first, digital watermarking (Digital Watermarking) technology is briefly introduced.Digital watermarking is meant Information hiding with high level of security in other Digital Media of low level security (comprising text, sound, image etc.), and openly transmits to realize the method for secret communication through dangerous channel.Implementation model is as shown in Figure 1 as the one of which; Wherein classified information (Secret Message) is the claimed object of secret communication; Carrier (Cover) is to liking host (Host) supplier of classified information; Realize that from present technology classified information and carrier both can be any type of numerical informations such as character string, text, image, sound, video.
At transmitting terminal, before the classified information embedding, when perhaps other require from the robustness that improves message, can carry out pre-service to form watermark information (Watermark) to classified information, for example use that error correction coding, use m-sequence are modulated etc.Especially,, can before classified information embeds, encrypt (Encryption) and handle, then ciphertext is hidden in the carrier object it in order to improve the security of Information hiding system.Information embeds (Embedding) stage; (if being necessary) is under user key control; System is hidden in watermark information according to the embedding algorithm and forms camouflaging object (Stego-Cover also claims to shelter object) in the carrier object, and final camouflaging object transmits through dangerous channel.At receiving end, can from camouflaging object, isolate carrier object, watermark information according to key and extraction algorithm, and finally reconstruct classified information.
Fig. 2 is for the process flow diagram of video tab method of the present invention, and is as shown in Figure 2, may further comprise the steps:
Step 200: the corresponding relation of setting up the file identification of label data and video file in advance.
In this step, the label data and the file identification of video file carried out record in film label information database, label data and file identification must be one to one here.File identification is used for video file of unique identification.
The corresponding relation of the file identification of label data and video file can be recorded in the film label information database.Film label information database is a record body based on list structure; Its concrete realization can be by the database product of present any main flow; Such as MySQL (is a small-sized Relational DBMS; The developer is a Sweden MySQLAB company) etc., and the difference of these database products obviously can not have influence on realization of the present invention.Database is made up of a tables of data, and what each bar record item of this table was preserved is the file identification a series of label datas corresponding with this video file of a video file.Specifically, the information that comprises of every record is following:
File identification is promptly with video file characteristic of correspondence sign indicating number.Can use the file identification of SHA 1 (SHA1) value of present main flow among the present invention as video file, like this can video file of unique identification.How to calculate the SHA1 value and belong to general knowledge as well known to those skilled in the art, and its concrete implementation method is not used in qualification protection scope of the present invention, repeat no more here.
Label data: film file self information is more, contain from film director, protagonist, publisher to cine-oriented image parameter or the like more, concrete data item setting can reference table 1 shown in, or according to concrete applying flexible decision.The concrete definition of label data item also is not used in qualification protection scope of the present invention.
Step 201: after the file identification of video file is treated to watermark information and embeds in the video file, issue this video file.
In this step, can file identification with the form of one section character string, be embedded in the video file data as classified information; Here, the video file before the embed watermark is carrier, in case embed watermark information is prepared promptly to become camouflaging object after issue gets into the consumer market.In order to guarantee the commercial value of film self, after watermark information embedded video file, significant change should not take place in the video image subjective visual quality do, promptly guarantees the transparency of watermarking algorithm, and this has also guaranteed not cause assailant's attention.
In this step; Because file identification is the character string that the plaintext form exists; If directly embed the multimedia signal dispose (like transcoding, compression etc.) of video file when being difficult to resist subsequent user receiver, video file, so often need carry out some Signal Pretreatment to form the watermark information that is fit to watermarking algorithm.Common processing means comprise: character string is converted into 0/1 bit stream or uses pseudo-random sequence said character string to be carried out spread spectrum or used fault-tolerant encoding that said character string is added redundant information, the verification when extracting with realization.Deng, the generation of watermark information is relevant with concrete watermarking algorithm, and belongs to technology as well known to those skilled in the art, and its concrete implementation method is not used in qualification protection scope of the present invention, repeats no more here.
One skilled in the art will appreciate that and use suitable digital watermarking algorithm, can the watermark information energy reasonably be distributed in the carrier data, and make watermark information can resist signal Processing attacks such as filtering, cutting, compression effectively.Like this, even the video file of embed watermark experiences processing such as coded format conversion, second-compressed again after issue, watermark information still can reside in the video file effectively.
Research to digital watermarking and Information hiding belongs to technology as well known to those skilled in the art, and existing at present ripe algorithm is suggested and widespread use, and the present invention repeats no more with its concrete realization.
The inventive method is step 202 also: from video file, obtain watermark information, and obtain label data through the inquiry of the file identification in the watermark information.
In this step, need obtain the user of label data, use watermark information and embed algorithm enforcement reverse process, from video file, obtain watermark signal; Again the watermark information that obtains is carried out contrary operation, obtain the file identification of this video file, the corresponding label data of file identification of this video file is inquired about and obtained to the one-to-one relationship of the file identification through setting up label data and video file in advance.
Also comprise before the step 202: the user side multimedia to the video file that receives carries out is handled.Modal multimedia is handled and is comprised: a kind of file layout is converted into make again after the parameters such as another kind of file layout, the image resolution ratio that changes original film, code check with compress, in film, insert advertisement or caption information after carry out through network that secondary is propagated, intercepting part video segment carries out that network is shared etc.After the processing through the multimedia processing module, very big conversion takes place at aspects such as file layout, coding parameter, effective durations in video file that receives and processed video file.The existing mode of utilizing file format protocol definition respective field to write down label data obviously can be handled the back in multimedia and lose; And the representation of file that comprises in the watermark information in the video file of the present invention; Can resist multimedia and handle the loss of data that possibly bring; Guaranteed follow-up effective extraction, thereby finally guaranteed through the querying server database access to identifying corresponding label data with this document to watermark information.
Visible from the inventive method; The label data of video file and unique file identification one to one are recorded in the server database, again video file are carried out Web publishing and propagation after simultaneously this document sign being embedded into video file with the mode of digital watermarking.Because digital watermarking is after embedding video file; Become the part of video data; Therefore; Even handle as after format conversion, the second-compressed, still can obtain the file identification of this video file, and finally arrive the label data of binding mutually with this document sign through the querying server database access through the extraction video watermark through complicated multimedia.
To the inventive method, a kind of video tab system also is provided, as shown in Figure 3, comprise label data and representation of file generation module, watermark generation module and merge module at least, wherein,
Label data and file identification generation module are used for the label data of recording of video file and the corresponding relation between file identification, and only, the unique file identification of video file is corresponding with this video file.
Watermark generation module is used for the file identification of video file is treated to watermark information.
Merge module is used for the watermark information that generates is embedded into video file, forms and shelters carrier, and the video file of embed watermark information is issued.The present invention is embedded into watermark information in the video file; Can not receive the restriction of video file Container Format, audio/video coding form; In addition; The more data redundant space is arranged in the video file, can be effectively embedded the algorithm utilization improving the stability and the robustness of watermark signal, still can extract watermark information effectively after handling thereby make film after the issue can resist complicated multimedia by digital watermarking.Digital watermarking embeds algorithm and belongs to mature technology, not in scope according to the invention, so the back literary composition repeats no more.
System of the present invention also comprises: watermark extracting module and label data acquisition module, wherein,
The watermark extracting module; Be used for when receiving the video file of issue; Extract the watermark information that embeds video file, such as adopting the inverse operation that embeds algorithm to realize that the realization of specific algorithm belongs to technology as well known to those skilled in the art; And and be not used in qualification protection scope of the present invention, not liquor-saturated giving unnecessary details here.
The label data acquisition module is used for through inquiry tag data and file identification generation module, obtaining the label data of the corresponding video file of this document sign from the watermark information extraction document sign that obtains.
System of the present invention also comprises the multimedia processing module, is used for that the video file that receives is carried out the user side multimedia and handles, and the processed video file is exported to the watermark extracting module.Modal multimedia is handled and is comprised: a kind of file layout is converted into make again after the parameters such as another kind of file layout, the image resolution ratio that changes original film, code check with compress, in film, insert advertisement or caption information after carry out through network that secondary is propagated, intercepting part video segment carries out that network is shared etc.After the processing through the multimedia processing module, very big conversion takes place at aspects such as file layout, coding parameter, effective durations in video file that receives and processed video file.The existing mode of utilizing file format protocol definition respective field to write down label data obviously can be handled the back in multimedia and lose; And the representation of file that comprises in the watermark information in the video file of the present invention; Can resist multimedia and handle the loss of data that possibly bring; Guaranteed follow-up effective extraction, thereby finally guaranteed through the querying server database access to identifying corresponding label data with this document to watermark information.
The present invention is before the video file issue; A unique file identification corresponding with the video tab data is recorded in the server database, again video file carried out Web publishing and propagation after simultaneously this document sign being embedded into video file with the mode of digital watermarking.Because digital watermarking is after embedding video file; Become the part of video data; Therefore, the instant video file is handled through complicated multimedia, after format conversion, second-compressed; Still can be through extracting the file identification that video watermark obtain this video file, and finally arrived the label data that sign is therewith bound mutually through the querying server database access.
The inventive method does not receive the influence of video file format fully; Avoided video file broken ring to label data in Internet communication and dual-spectrum process effectively; Thereby a kind of video tab scheme of efficient, robustness is provided, for magnanimity video index and retrieval fast provide maybe.Simultaneously, that the user also can have access to is stable, label data accurately, grasps more information except that substance film, thereby has satisfied the multi-faceted multimedia recreation demand of user, has improved user experience.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a video tab method is characterized in that, comprising: the corresponding relation of setting up the file identification of label data and video file in advance;
After the file identification of video file is treated to watermark information and embeds in the corresponding video file, issue this video file.
2. video tab method according to claim 1 is characterized in that, this method also comprises: from the video file of said issue, obtain watermark information, and obtain label data through the inquiry of the file identification in the watermark information.
3. video tab method according to claim 2 is characterized in that, saidly from the video file of issue, obtains before the watermark information, and this method also comprises: the said video file that receives is carried out the user side multimedia handle.
4. according to claim 1,2 or 3 described video tab methods, it is characterized in that the corresponding relation of the file identification of said label data and video file is stored in the film label information database.
5. method according to claim 4 is characterized in that, the file identification of said video file is and video file characteristic of correspondence sign indicating number.
6. video tab method according to claim 1 is characterized in that, the file identification of said video file is the character string that the plaintext form exists;
Said file identification with video file is treated to watermark information and comprises: said file identification is carried out Signal Pretreatment to form the watermark information that is fit to watermarking algorithm.
7. video tab method according to claim 6; It is characterized in that said Signal Pretreatment comprises: said character string is converted into 0/1 bit stream or uses pseudo-random sequence that said character string is carried out spread spectrum or used fault-tolerant encoding that said character string is added redundant information.
8. a video tab system is characterized in that, comprises label data and representation of file generation module, watermark generation module and merge module at least, wherein,
Label data and file identification generation module are used for the label data of recording of video file and the corresponding relation between file identification;
Watermark generation module is used for the file identification of video file is treated to watermark information;
Merge module is used for the watermark information that generates is embedded into video file, and the video file of embed watermark information is issued.
9. video tab according to claim 8 system is characterized in that this system also comprises: watermark extracting module and label data acquisition module, wherein,
The watermark extracting module is used to extract the watermark information that embeds the video file that receives;
The label data acquisition module is used for through inquiry tag data and file identification generation module, obtaining the label data of the corresponding video file of this document sign from the watermark information extraction document sign that obtains.
10. video tab according to claim 9 system; It is characterized in that; This system also comprises the multimedia processing module, is used for that the video file that receives is carried out the user side multimedia and handles, and the processed video file is exported to said watermark extracting module.
CN2010102825392A 2010-09-14 2010-09-14 Video tagging method and system Pending CN102402542A (en)

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CN106792088A (en) * 2016-12-15 2017-05-31 北京奇艺世纪科技有限公司 The encryption and decryption method and system of a kind of plug-in captions, plug-in caption system
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CN104737121B (en) * 2012-09-04 2018-06-22 谷歌有限责任公司 Video playing is multiplexed and is demultiplexed in a browser
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CN106792088A (en) * 2016-12-15 2017-05-31 北京奇艺世纪科技有限公司 The encryption and decryption method and system of a kind of plug-in captions, plug-in caption system
CN106792088B (en) * 2016-12-15 2020-06-30 北京奇艺世纪科技有限公司 Plug-in subtitle encryption and decryption method and system and plug-in subtitle system
CN106855919A (en) * 2016-12-22 2017-06-16 广东清立方科技有限公司 A kind of surgical operation images acquisition management method and a kind of surgical operation images harvester
CN111199745A (en) * 2018-11-20 2020-05-26 尼尔森网联媒介数据服务有限公司 Advertisement identification method, equipment, media platform, terminal, server and medium
CN109598231A (en) * 2018-12-03 2019-04-09 广州市百果园信息技术有限公司 A kind of recognition methods of video watermark, device, equipment and storage medium

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