CN103458320B - Realize the method that video adds digital watermarking - Google Patents
Realize the method that video adds digital watermarking Download PDFInfo
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Abstract
The present invention relates to a kind of method realizing video interpolation digital watermarking, wherein copyright control system based on digital watermark includes that module, DBM and memory module are added in front page layout module, scheduler module, streaming media module, transcoding and watermark, described scheduler module is in order to receive the mission bit stream of described front page layout module transmission and to determine execution corresponding strategy scheduling transcoding and streaming media service, and described transcoding and watermark interpolation module in order to become the picture of YUV vector format and to add the watermark information represented with 0,1 bit signal by video conversion.This kind is used to realize the method that video adds digital watermarking, simplicity can be realized and add watermark the most in video, better control over video copy by watermark, improve batch and add efficiency and the effectiveness of Detection and Extraction watermark of watermark, there is broader applications scope.
Description
Technical field
The present invention relates to digital watermarking field, particularly relate to copyright control field based on digital watermark technology, specifically refer to one
The method that copyright control system based on digital watermark and video add digital watermarking.
Background technology
Along with the high speed development of information industry, the generation of digitized information, transmission get more and more.Especially video information, closely
Within several years, create volatile growth.The problems such as network for free is downloaded, piracy floods market, related management Institutional Sluggish are led
The interests causing copyright owner sustain damage.In order to promote the exchange of copyright information, the relevant benefit of protection copyright owner, gather around
It is in demand that the copyright trading platform having video watermark adding technique is undoubtedly market today.
For increasing digital product, copyright trading platform facilitates the exchange of digital product.Effective in order to effectively take precautions against
Bootlegging and propagation to information, the legitimate interests of protection intellectual property owner, digital watermark provides a kind of protection knowledge
The effective ways of copyright.
Copyright trading system can significantly facilitate the exchange of copyright information, and copyright owner easier can sell out the version of oneself
Power product, operator can easier purchase copyrighted product.Exchange facilitates, and various copyright programme are issued also can be more smooth,
And be eventually that vast user is benefited.
In order to be collected evidence copyright information by piracy, preventing copyright interest from being encroached on, we need to use in copyright trading system
Digital watermark technology.Digital watermark technology is to be directly embedded in the middle of digital carrier by some identification informations (i.e. digital watermarking), and
Do not affect the use value of original vector, be not easy to be ascertained yet and again revise.But can be by producer identification and identification.Pass through
These information hidden in the carrier, can reach confirm creator of content, buyer, transmission secret information or judge carrier
The purpose such as whether it is tampered.Digital watermarking is the effective way realizing copyright protection, is the important of Investigation of Information Hiding Technology field
Branch and research direction.At present, constantly there is the new method adding watermark to be found out, but many methods often perform
The most complicated, do not possess industrialized practicality.The mode such as taking wavelet transformation processes original image, then at wavelet transformation
After frequency domain add information to be added.This watermark adding method is the most computationally intensive, and programming process is complicated,
Reduce the efficiency of mass disposal video, add the cost of copyright control, and general copyright protection application be not required to as
The program of this complexity adds watermark.
Summary of the invention
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that one is capable of simplicity the most in video
Add watermark, better controled over video copy, the raising batch interpolation efficiency of watermark and having of Detection and Extraction watermark by watermark
The method that effect property, the copyright control system based on digital watermark with broader applications scope and video add digital watermarking.
To achieve these goals, the method that the copyright control system based on digital watermark of the present invention and video add digital watermarking
Have and constitute as follows:
Being somebody's turn to do copyright control system based on digital watermark, it is mainly characterized by, and described system includes:
Front page layout module, in order to be supplied to user by socket by transaction control information and to obtain the operation information of user；
Scheduler module, refers in order to the mission bit stream transmission corresponding strategy scheduling transcoding receiving described front page layout module transmission
Order and streaming media service instruct；
Streaming media module, performs video playback, the dragging of video playback progress and video in order to the instruction according to described scheduler module
Play the Streaming Media action stopped；
Transcoding and watermark add module, in order to video conversion to become the picture of YUV vector format and adds with 0,1 bit signal
The watermark information represented, this transcoding and watermark are added module and are connected with described scheduler module；
DBM, in order to receive user profile, operation note information and the rights file that described front page layout module obtains
Recommended information also preserves；
Memory module, in order to the video data after storing video data and transcoding that user uploads and adding watermark, this memory module
Add module with described transcoding and watermark respectively and streaming media module is connected.
Include it is preferred that module is added in described transcoding and watermark:
Decompression converting unit, in order to be converted into the image data of YUV vector format by video data decompression；
Watermark adding device, in order to add to the watermark information represented with 0,1 bit signal in the macro zone block of designated frame picture；
Compression memory element, re-compresses into video data in order to the image data after adding watermark information and sends to described
Memory module.
The invention still further relates to a kind of method realizing video interpolation digital watermarking based on described system, it is mainly characterized by, described
Method comprise the following steps:
(1) transcoding and watermark described in are added module and the watermark information added will be needed to change into 1,0 bit signal represented；
(2) transcoding and watermark described in are added module and the video data decompression of watermark to be added are converted to YUV vector format
Image data；
(3) transcoding and watermark described in add what the brightness value of each macro zone block in designated frame picture was added as needed on by module
The bit signal of watermark information is modified；
(4) transcoding and watermark described in are added the video data after module will add watermark and are re-compressed and send to described storage
Module.
It is preferred that described decompresses the image data being converted to YUV vector format by the video data of watermark to be added, including
Following steps:
(21) video data of watermark to be added is decompressed as image data；
(22) judge the type of the image data after decompression, if the picture of RGB vector format, then continue step (23),
If the picture of YUV vector format, then continue step (3)；
(23) picture of described RGB vector format is converted into the picture of YUV vector format, then proceedes to step (3).
It is preferred that the bit of watermark information that the described brightness value by each macro zone block in designated frame picture is added as needed on
Signal is modified, and comprises the following steps:
(31) value of the bit signal of watermark information corresponding to each macro zone block is judged, if 1, then continue step (32),
If 0, then continue step (33)；
(32) by the brightness value of pixel all of in macro zone block corresponding for this bit signal plus systemic presupposition brightness flop value,
Then proceed to step (4)；
(33) brightness value of pixel all of in macro zone block corresponding for this bit signal is deducted systemic presupposition brightness flop value,
Then proceed to step (4).
More preferably, the described brightness value by pixel all of in macro zone block corresponding for this bit signal adds systemic presupposition brightness
Changing value, comprises the following steps:
(321) brightness value of each pixel in the macro zone block that this bit signal is corresponding is judged successively, if greater than 255 and system
The difference of predetermined luminance changing value, then continue step (322), otherwise continues step (323)；
(322) brightness value of this pixel is set to 255；
(323) by the brightness value of this pixel plus systemic presupposition brightness flop value.
Further, between described step (323) and (4), further comprising the steps of:
(324) absolute value of the brightness value increment sum of all pixels in this macro zone block after brightness value is revised in judgement, if greatly
In 100 × systemic presupposition brightness flop value, then continue step (4), otherwise continue step (325)；
(325) the former brightness value of all pixels in this macro zone block is deducted the systemic presupposition brightness flop value of 2 times as new brightness
Value.
More preferably, the described brightness value by pixel all of in macro zone block corresponding for this bit signal deducts systemic presupposition brightness
Changing value, comprises the following steps:
(331) brightness value of each pixel in the macro zone block that this bit signal is corresponding is judged successively, bright if less than systemic presupposition
Degree changing value, then continue step (332), otherwise continue step (333)；
(332) brightness value of this pixel is set to 0；
(333) brightness value of this pixel is deducted systemic presupposition brightness flop value.
Further, between described step (333) and (4), further comprising the steps of:
(334) absolute value of the brightness value reduction amount sum of all pixels in macro zone block after brightness value is revised in judgement, if greater than
100 × systemic presupposition brightness flop value, then continue step (4), otherwise continues step (335)；
(335) using the former brightness value of all pixels of this macro zone block plus the systemic presupposition brightness flop value of 2 times as new bright
Angle value.
It is preferred that after described step (4), further comprising the steps of:
(5) transcoding and watermark described in are added module and are extracted the watermark information in video data.
More preferably, the described watermark information extracted in video data, comprise the following steps:
(51) the video data decompression by watermark to be extracted is converted to the image data of YUV vector format；
(52) each of brightness value sum macro zone block corresponding with original video of each pixel of the macro zone block of watermark will be added
The brightness value sum of pixel subtract each other compare and according to the size of difference determine correspondence with 0,1 bit signal represented；
(53) described is converted into corresponding watermark information with 0,1 bit signal represented.
Further, the described size according to difference determine correspondence with 0,1 bit signal represented, comprise the following steps:
(521) judge described in difference as on the occasion of or negative value, if on the occasion of, then continue step (522), if negative value,
Then continue step (523)；
(522) numerical values recited of the difference described in judgement, if the numerical value of described difference becomes less than or equal to systemic presupposition brightness
The value of pixel quantity product in change value and this macro zone block, then the bit signal of the watermark information that this macro zone block is corresponding is 1, otherwise,
The bit signal of the watermark information that this macro zone block is corresponding is 0；
(523) order of magnitude of the difference described in judgement, if the absolute value of described difference is bright less than or equal to systemic presupposition
The value of pixel quantity product in degree changing value and this macro zone block, then the bit signal of the watermark information that this macro zone block is corresponding is 0,
Otherwise, the bit signal of the watermark information that this block is corresponding is 1.
Have employed the copyright control system based on digital watermark in this invention and the method for video interpolation digital watermarking, have as follows
Beneficial effect:
To add the method for watermark simple and practical for the video that realizes of the present invention, and either coding still adds watermark and is quite convenient to,
And watermark is difficult to discover, there is good disguise, can extract well.Watermark adding technique is incorporated by the present invention simultaneously
In copyright trading control system, play its practicality, it is ensured that copyright control efficiently performs, better controled over by watermark
Video copy, improves batch and adds efficiency and the effectiveness of Detection and Extraction watermark of watermark, have broader applications scope.
Accompanying drawing explanation
Fig. 1 is the structural representation of the copyright control system based on digital watermark of the present invention.
Fig. 2 is that the copyright control systematic difference based on digital watermark of the present invention is in the detailed construction schematic diagram of embodiment.
Fig. 3 is the adding procedure schematic diagram of the method realizing video interpolation watermark of the present invention.
Fig. 4 be the present invention extract the flow chart of the method for watermark in video.
Fig. 5 is the detail flowchart of the method realizing video interpolation watermark of the present invention.
Detailed description of the invention
In order to more clearly describe the technology contents of the present invention, conduct further description below in conjunction with specific embodiment.
The present invention is based on copyright trading system, it is proposed that the addition manner of a kind of simple and practical video watermark.The present invention can be successful
Watermark is added among video, and is not only that the stage is added in the watermark resting on single image.Watermark is added by the present invention simultaneously
Technology incorporates copyright trading system, and to play its practicality, amount of calculation is not too large simultaneously, and programming is the simplest, permissible
Effectively add among Practical Project.This invention elaborates how digital watermark is effectively held among copyright trading system simultaneously
OK.
For realizing above-mentioned task, following technical solution is taked in this invention:
The structural representation of the copyright control system based on digital watermark of the present invention it is shown such as Fig. 1～2.
A kind of copyright trading system adding digital watermarking based on video, it is characterised in that this system includes:
Front page layout module, is responsible for providing information mutual with user.On the one hand front page layout module is provided by the interface on network
To the various Transaction Information of user, the various operation information the operation to user that on the other hand accept user's offer are fed back.
Scheduler module, scheduler module is mainly responsible for accepting the task requests that front page layout issues, and takes appropriate strategy scheduling transcoding
And streaming media service.
Front page layout needs task to be processed to be divided into three kinds:
One, user's uploaded videos；
Two, video code conversion and watermark task scheduling, according to demand, is converted into corresponding form and adds watermark；
Three, response video preview request, according to the video file plug-flow of type selecting a certain kind code check of user's request.
Streaming media module, streaming media module is mainly responsible for providing streaming media service, including video playback, is dragged and stop.
Module is added in transcoding and watermark, processes video by the way of transcoding and interpolation watermark.This module except transcoding with
Outward, watermarking algorithm can be completed, embedding and the extraction of watermark information can be carried out.
Transcoding and watermark are added module and are included:
Decompression converting unit, in order to be converted into the image data of YUV vector format by video data decompression；
Watermark adding device, in order to add to the watermark information represented with 0,1 bit signal in the macro zone block of designated frame picture；
Compression memory element, re-compresses into video data in order to the image data after adding watermark information and sends to described
Memory module.
DBM, preserves the information such as user profile, operation note, rights file introduction.
Memory module, the data that memory module is mainly responsible for uploading user store.Including the number after transcoding and interpolation watermark
According to.
Front page layout module is responsible for mutual with the buyer and the seller, and seller's uploaded videos, buyer's preview video, is all by foreground page
Face.Front page layout also returns to buyer's video address and identity verifying information.Front page layout except with customer interaction information, also
It is connected with scheduler module and DBM.
DBM preserves various information during System Operation, believes including user profile, operation note, rights file introduction etc.
Breath.Scheduler module obtains user's operation information from foreground page module and carries out relevant scheduling.When user's uploaded videos, scheduling
Video is stored in memory module by module.The busy degree adding module according to transcoding and watermark arranges transcoding and watermark interpolation to appoint
Business.When transcoding and watermark interpolation module are the most busy, are issued transcoding by the video information in memory module for scheduler module and watermark adds
Add module to process.In the process, need to determine the content that watermark is added.Video after transcoding and interpolation watermark is placed into
Memory module.
When user wants preview video, first sending the requirement of preview video to desk module, front page layout returns to buyer's video ground
Location and identity verifying information.The buyer utilizes video address and identity verifying information to send preview request to streaming media server,
Scheduler module now authentication, after being verified, the preview video request of the streaming media server response buyer.
Memory module is connected with streaming media module.When the buyer has preview request, scheduler module carries out proof of identity.Verification is passed through
After, the information of scheduler module scheduling memory module, by streaming media module, video code flow is pushed.
Adding among module at transcoding and watermark, we take a kind of simple watermark to add algorithm.This watermarking algorithm is to 16 × 16
The macro zone block (Macroblock) of pixel operates.Because essentially all of compression algorithm is all single with macro zone block for operation
Position.So even across compression, the watermark that this algorithm adds also can be retained.
The pixel value of one pixel can represent with YUV (YUV).Wherein Y is luminance signal, UV
It it is carrier chrominance signal.We take the mode to Y value change to add watermark.One is because not interfering with for the change of brightness
The character of image.Another reason be major part compression algorithm by chromatic value UV high compression, the often pigment of 4 pixels
It is worth and replaces by a value.Watermark is added in brightness value Y and can the most well preserve information.
In article [1], image is carried out DCT (Discrete Cosine Transformation, discrete cosine transform) by block, so
After by Information hiding among the DC component of DCT coefficient, picture quality will not be made a significant impact by this method, and phase
For by Information hiding among the AC component of DCT coefficient, this method robustness is higher.
([1] Jiwu Huang, Yun Q.Shi, and Yi Shi, " Embedding Image WatermarKs in DC
Components ", IEEE Transactions on Circuits and SYstems for Video TechnologY, Vol.10, No.6,
September 2000)
Article [1] carries out DCT frequency domain transform to the block of pixels of image, and then the DC to frequency domain measures and processes.The most this place
Reason method can be carried out in time domain completely, is directly modified the value of the block of pixels of time domain, is equivalent to the DC component to frequency domain
It is modified, saves the time of dct transform, and programming is also greatly simplified.
The present invention realizes adding in video the way of watermark, takes following steps.
It is illustrated in figure 3 the adding procedure schematic diagram realizing adding in video the method for watermark of the present invention.
(1) signal added will be needed to represent with the bit signal of 1,0
(2) by video compression, decompress as YUV vector.If RGB (RGB color representation) is vectorial, it is converted into
YUV vector.
It is illustrated in figure 5 the detail flowchart realizing adding in video the method for watermark of the present invention.
(3) Y value of each macro zone block is changed.For a macro zone block, if (in an experiment, all pixels add K
K is taken 5 by us), if all pixel values of representation signal 1. subtract K, representation signal 0. is changed according to be inputted 1,0 signal
The value of macro zone block.
(4) video signal that pixel value is changed is re-compressed preservation.
The method either coding is also carried out the simplest, can be effectively saved among video by signal,
And the signal that extracts preservation is the simplest.
When needs embed watermark, the information that we first will embed encodes with 0,1.The video compression of watermark will be embedded simultaneously
Become a frame frame picture, every frame picture YUV vector representation.We are the Y-direction of the macro zone block of information designated frame to be embedded
Amount changing value represents.For a macro zone block, we change the luminance y value in this macro block district.For signal 1, we
The Y value of one macro zone block pixel adds K.For signal 0, we subtract K the Y value of a macro zone block pixel.By this
The mode of kind, we add watermark signal among video.Finally video signal compression is preserved by we.
We represent the pixel value YUV vector of video signal, and wherein Y represents luminance signal, and UV represents carrier chrominance signal.
The span of Y is 0～255.Thus there will be a problem.If among a macro zone block, Y value may be the biggest,
It is all 255 or close to 255.Now signal 1 be difficult to use among mode that Y value is added represent.In like manner, Y
Value may be the least, is all 0 or close to 0.Now signal 0 be difficult to use among mode that Y value is reduced represent.
In order to solve this problem, we take following method to represent.
For signal 1, we add K the Y value of all pixels among a macro zone block.When Y value is that (255-K) is to 255
Between, we are set to 255 Y value.If for a macro zone block, Y value increases less than 100 × K, and we are changing one
Mode represents signal 1.We subtract 2K the Y value of all pixels among a macro zone block.
For signal 0, we subtract K the Y value of all pixels among a macro zone block.When Y value be K to 0 between, we
Y value is set to 0.If for a macro zone block, Y value reduces less than 100 × K, and we alternatively represent signal 0.
We add 2K the Y value of all pixels among a macro zone block.
If Fig. 4 is to realize extracting the flow chart of the method for watermark in video in the present invention.
When needs extract watermark, we choose the frame of video adding watermark, regard with original by the Y value of the macro zone block adding watermark
The Y value of the corresponding macro zone block of frequency is subtracted each other and is compared.When difference is more than certain threshold, it is believed that be signal 1.When difference is little
In certain threshold, it is believed that be signal 0.Finally, we utilize the 1 of acquisition, 0 signal to be to judge concrete watermark signal
What is.
When judging signal 1, if the Y value of the pixel of one macro zone block of watermark video is a lot of the biggest, close to 255.Add water
The Y of pixel of the relatively primitive video of Y value of the pixel of print video is little a lot, (because the Y value of pixel subtracts 2K) then
For signal 1.For a macro zone block, if Y value less, then be signal 0.(because the Y value of pixel subtracts K)
When judging signal 0, if the Y value of the pixel of one macro zone block of watermark video is the least, close to 0.Watermarking
The Y of the pixel of the relatively primitive video of Y value of the pixel of video is big a lot, and (because the Y value of pixel adds 2K) is then
Signal 0.For a macro zone block, if Y value bigger, then be signal 0.(because the Y value of pixel adds K).
Have employed the copyright control system based on digital watermark in this invention and the method for video interpolation digital watermarking, have as follows
Beneficial effect:
To add the method for watermark simple and practical for the video that realizes of the present invention, and either coding still adds watermark and is quite convenient to,
And watermark is difficult to discover, there is good disguise, can extract well.Watermark adding technique is incorporated by the present invention simultaneously
In copyright trading control system, play its practicality, it is ensured that copyright control efficiently performs, better controled over by watermark
Video copy, improves batch and adds efficiency and the effectiveness of Detection and Extraction watermark of watermark, have broader applications scope.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that still may be made that various
Amendment and conversion are without departing from the spirit and scope of the present invention.Therefore, specification and drawings is considered as illustrative rather than limits
Property processed.
Claims (9)
1. one kind realizes the method that video adds digital watermarking, it is characterised in that copyright control system based on digital watermark includes:
Front page layout module, in order to be supplied to user by socket by transaction control information and to obtain the operation information of user；
Scheduler module, refers in order to the mission bit stream transmission corresponding strategy scheduling transcoding receiving described front page layout module transmission
Order and streaming media service instruct；
Streaming media module, performs video playback, the dragging of video playback progress and video in order to the instruction according to described scheduler module
Play the Streaming Media action stopped；
Transcoding and watermark add module, in order to video conversion to become the picture of YUV vector format and adds with 0,1 bit signal
The watermark information represented, this transcoding and watermark are added module and are connected with described scheduler module；
DBM, in order to receive user profile, operation note information and the rights file that described front page layout module obtains
Recommended information also preserves；
Memory module, in order to the video data after storing video data and transcoding that user uploads and adding watermark, this memory module
Add module with described transcoding and watermark respectively and streaming media module is connected；
Described method comprises the following steps:
(1) transcoding and watermark described in are added module and the watermark information added will be needed to change into 1,0 bit signal represented；
(2) transcoding and watermark described in are added module and the video data decompression of watermark to be added are converted to YUV vector format
Image data；
(3) transcoding and watermark described in add what the brightness value of each macro zone block in designated frame picture was added as needed on by module
The bit signal of watermark information is modified；
(4) transcoding and watermark described in are added the video data after module will add watermark and are re-compressed and send to described storage
Module；
The bit signal of the watermark information that the described brightness value by each macro zone block in designated frame picture is added as needed on is carried out
Change, comprises the following steps:
(31) value of the bit signal of watermark information corresponding to each macro zone block is judged, if 1, then continue step (32),
If 0, then continue step (33)；
(32) by the brightness value of pixel all of in macro zone block corresponding for this bit signal plus systemic presupposition brightness flop value,
Then proceed to step (4)；
(33) brightness value of pixel all of in macro zone block corresponding for this bit signal is deducted systemic presupposition brightness flop value,
Then proceed to step (4).
The most according to claim 1 realize the method that video adds digital watermarking, it is characterised in that described by be added
The video data decompression of watermark is converted to the image data of YUV vector format, comprises the following steps:
(21) video data of watermark to be added is decompressed as image data；
(22) judge the type of the image data after decompression, if the picture of RGB vector format, then continue step (23),
If the picture of YUV vector format, then continue step (3)；
(23) picture of described RGB vector format is converted into the picture of YUV vector format, then proceedes to step (3).
The most according to claim 1 realize the method that video adds digital watermarking, it is characterised in that described by this bit
In the macro zone block that signal is corresponding, the brightness value of all of pixel adds systemic presupposition brightness flop value, comprises the following steps:
(321) brightness value of each pixel in the macro zone block that this bit signal is corresponding is judged successively, if greater than 255 and system
The difference of predetermined luminance changing value, then continue step (322), otherwise continues step (323)；
(322) brightness value of this pixel is set to 255；
(323) by the brightness value of this pixel plus systemic presupposition brightness flop value.
The method realizing video interpolation digital watermarking the most according to claim 3, it is characterised in that described step (323)
(4) between, further comprising the steps of:
(324) absolute value of the brightness value increment sum of all pixels in this macro zone block after brightness value is revised in judgement, if greatly
In 100 × systemic presupposition brightness flop value, then continue step (4), otherwise continue step (325)；
(325) the former brightness value of all pixels in this macro zone block is deducted the systemic presupposition brightness flop value of 2 times as new brightness
Value.
The most according to claim 1 realize the method that video adds digital watermarking, it is characterised in that described by this bit
In the macro zone block that signal is corresponding, the brightness value of all of pixel deducts systemic presupposition brightness flop value, comprises the following steps:
(331) brightness value of each pixel in the macro zone block that this bit signal is corresponding is judged successively, bright if less than systemic presupposition
Degree changing value, then continue step (332), otherwise continue step (333)；
(332) brightness value of this pixel is set to 0；
(333) brightness value of this pixel is deducted systemic presupposition brightness flop value.
The method realizing video interpolation digital watermarking the most according to claim 5, it is characterised in that described step (333)
(4) between, further comprising the steps of:
(334) absolute value of the brightness value reduction amount sum of all pixels in macro zone block after brightness value is revised in judgement, if greater than
100 × systemic presupposition brightness flop value, then continue step (4), otherwise continues step (335)；
(335) using the former brightness value of all pixels of this macro zone block plus the systemic presupposition brightness flop value of 2 times as new bright
Angle value.
The method realizing video interpolation digital watermarking the most according to claim 1, it is characterised in that described step (4)
Afterwards, further comprising the steps of:
(5) transcoding and watermark described in are added module and are extracted the watermark information in video data.
The method realizing video interpolation digital watermarking the most according to claim 7, it is characterised in that described extraction video
Watermark information in data, comprises the following steps:
(51) the video data decompression by watermark to be extracted is converted to the image data of YUV vector format；
(52) each of brightness value sum macro zone block corresponding with original video of each pixel of the macro zone block of watermark will be added
The brightness value sum of pixel subtract each other compare and according to the size of difference determine correspondence with 0,1 bit signal represented；
(53) described is converted into corresponding watermark information with 0,1 bit signal represented.
The most according to claim 7 realize the method that video adds digital watermarking, it is characterised in that described according to difference
Size determine correspondence with 0,1 bit signal represented, comprise the following steps:
(521) judge described in difference as on the occasion of or negative value, if on the occasion of, then continue step (522), if negative value,
Then continue step (523)；
(522) numerical values recited of the difference described in judgement, if the numerical value of described difference becomes less than or equal to systemic presupposition brightness
The value of pixel quantity product in change value and this macro zone block, then the bit signal of the watermark information that this macro zone block is corresponding is 1, otherwise,
The bit signal of the watermark information that this macro zone block is corresponding is 0；
(523) order of magnitude of the difference described in judgement, if the absolute value of described difference is bright less than or equal to systemic presupposition
The value of pixel quantity product in degree changing value and this macro zone block, then the bit signal of the watermark information that this macro zone block is corresponding is 0,
Otherwise, the bit signal of the watermark information that this block is corresponding is 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386395.9A CN103458320B (en) | 2013-08-29 | 2013-08-29 | Realize the method that video adds digital watermarking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386395.9A CN103458320B (en) | 2013-08-29 | 2013-08-29 | Realize the method that video adds digital watermarking |
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| Publication Number | Publication Date |
|---|---|
| CN103458320A CN103458320A (en) | 2013-12-18 |
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| CN110971931A (en) * | 2018-09-30 | 2020-04-07 | 北京微播视界科技有限公司 | Video watermark adding method and device, electronic equipment and storage medium |
| CN112040336B (en) * | 2019-06-03 | 2023-03-14 | 中兴通讯股份有限公司 | Method, device and equipment for adding and extracting video watermark |
| CN111510776A (en) * | 2020-05-11 | 2020-08-07 | 知安视娱(南京)科技有限公司 | Method and system for inserting and extracting watermark identification |
| CN112511836A (en) * | 2020-11-10 | 2021-03-16 | 北京达佳互联信息技术有限公司 | Transcoding method, device, server and storage medium of watermark file |
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