CN107358571A - Watermark embedding method and device - Google Patents
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- CN107358571A CN107358571A CN201710569141.9A CN201710569141A CN107358571A CN 107358571 A CN107358571 A CN 107358571A CN 201710569141 A CN201710569141 A CN 201710569141A CN 107358571 A CN107358571 A CN 107358571A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0053—Embedding of the watermark in the coding stream, possibly without decoding; Embedding of the watermark in the compressed domain
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Abstract
The embodiment of the present invention proposes a kind of watermark embedding method and device, is related to digital watermark technology field.The watermark embedding method and device by video source, watermark data by being converted to transform domain image and transform domain watermark respectively, transform domain watermark is embedded in transform domain image so as to obtain the changing image of embedded watermark again, so as to during embedded watermark, avoid prediction and quantify that the two amounts of calculation are larger, time-consuming step more, complexity is higher；Simultaneously during the changing image of embedded watermark is converted into output video, equally no longer need to predict and quantify the two steps, so as to substantially increase the speed of embedded watermark and efficiency, saved processing time.
Description
Technical field
The present invention relates to digital watermark technology field, in particular to a kind of watermark embedding method and device.
Background technology
Digital watermark technology is that some identification informations (i.e. digital watermarking) are directly embedded among digital carrier to (including more matchmakers
Body, document, software etc.) or secondary indication (structure of modification specific region), and the use value of original vector is not influenceed, also not
Easily it is ascertained and changes again, but can be identified and recognized by producer., can be with by these insertion information in the carrier
Reach and confirm creator of content, buyer, transmission secret information or judge the purpose of whether carrier is tampered.Digital watermarking is
Protection information safely, realize it is false proof trace to the source, the effective way of copyright protection, be Investigation of Information Hiding Technology field important branch
And research direction.
In the prior art, during visible watermark is embedded in video file, need to carry out successively mostly to decapsulate-
The work of decoding-insertion watermark-coding-encapsulation, and in an encoding process, it usually needs picture signal is predicted so as to obtain
Obtain residual error；Then need into line translation；Then quantization operation is carried out again to reduce the scale of transform domain image；Finally carry out entropy volume
Code is operated the further Lossless Compression of data after quantization, generates bitstream data.Decoding process is with cataloged procedure on the contrary, and pre-
The process surveyed and quantified is more complicated, it is necessary to expend the more time, thus the speed of embedded watermark is slower, less efficient.
The content of the invention
It is an object of the invention to provide a kind of watermark embedding method and device, to accelerate the speed of embedded watermark, improves
The operating efficiency of embedded watermark.
To achieve these goals, the technical scheme that the embodiment of the present invention uses is as follows：
In a first aspect, the embodiments of the invention provide a kind of watermark embedding method, the watermark embedding method includes：
Input video source is converted into multiple transform domain images；
The watermark data of input is converted into transform domain watermark；
The transform domain watermark is embedded in the transform domain image so as to obtain the changing image of embedded watermark；
The changing image of the embedded watermark is converted into output video.
Second aspect, the embodiment of the present invention additionally provide a kind of watermark embedding device, and the watermark embedding device includes：
Converting unit, input video source is converted into multiple transform domain images；
The converting unit is additionally operable to the watermark data of input being converted to transform domain watermark；
Watermark embedder unit, for the transform domain watermark to be embedded in into the transform domain image so as to obtain embedded watermark
Changing image；
Inverse transform unit, for the changing image of the embedded watermark to be converted into output video.
Watermark embedding method and device provided by the invention, by the way that video source, watermark data are converted into transform domain respectively
Image and transform domain watermark, then transform domain watermark is embedded in transform domain image so as to obtain the changing image of embedded watermark, so as to
During embedded watermark, avoid prediction and quantify that the two amounts of calculation are larger, time-consuming step more, complexity is higher
Suddenly；Simultaneously during the changing image of embedded watermark is converted into output video, equally no longer need to predict and quantify this two
Individual step, so as to substantially increase the speed of embedded watermark and efficiency, processing time is saved.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows the functional block diagram of watermark embedded system provided in an embodiment of the present invention.
Fig. 2 shows the functional block diagram of watermark embedding device provided in an embodiment of the present invention.
Fig. 3 shows the submodule schematic diagram of converting unit provided in an embodiment of the present invention.
Fig. 4 shows the further submodule schematic diagram of converting unit provided in an embodiment of the present invention.
Fig. 5 shows the submodule schematic diagram of watermark embedder unit provided in an embodiment of the present invention.
Fig. 6 shows the submodule schematic diagram of inverse transform unit provided in an embodiment of the present invention.
Fig. 7 shows the flow chart of watermark embedding method provided in an embodiment of the present invention.
Fig. 8 shows the further flow chart of step S701 in Fig. 7.
Fig. 9 shows the further flow chart of step S702 in Fig. 7.
Figure 10 shows the further flow chart of step S703 in Fig. 7.
Figure 11 shows the further flow chart of step S704 in Fig. 7.
Icon：100- watermark embedded systems；101- memories；102- storage controls；103- processors；104- peripheral hardwares connect
Mouthful；105- radio frequency units；200- watermark embedding devices；210- converting units；211- decapsulates subelement；212- solution entropy code
Unit；213- inverse quantization subelements；214- watermarking images generate subelement；The watermark of 215- transform domains generates subelement；220- water
Print embedded unit；222- pixel values obtain subelement；224- judgment sub-units；226- pixel value determination subelements；230- is reversed
Change unit；232- quantifies subelement；234- coded sub-units；236- encapsulates subelement.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.Meanwhile the present invention's
In description, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Referring to Fig. 1, Fig. 1 shows a kind of function for the watermark embedded system 100 that can be applied in the embodiment of the present invention
Block diagram.As shown in figure 1, watermark embedded system 100 include watermark embedding device 200, memory 101, storage control 102, one
Individual or multiple (one is only shown in figure) processor 103, Peripheral Interface 104, radio frequency unit 105 etc..These components pass through one
Or a plurality of communication bus/signal wire is in communication with each other.The watermark embedding device 200 include it is at least one can be with software or firmware
(firmware) form is stored in the memory 101 or is solidificated in the operating system of the watermark embedded system 100
SFU software functional unit in (operating system, OS).
Memory 101 can be used for storage software program and unit, such as the watermark embedding device in the embodiment of the present invention and
Programmed instruction/unit corresponding to method, processor 103 are stored in software program and list in memory 101 by operation
Member, so as to perform various function application and data processing, such as watermark embedding method provided in an embodiment of the present invention.Memory
101 may include high speed random access memory 101, may also include nonvolatile memory 101, as one or more magnetic storage fills
Put, flash memory or other non-volatile solid state memories 101.Processor 103 and other possible components are to memory 101
Access can be carried out under the control of storage control 102.
It should be noted that in a kind of preferred embodiment, processor 103 includes CPU and GPU two parts.Due to GPU
Concurrency it is stronger, there is substantial amounts of parallel computation unit, multiple calculating tasks can be handled simultaneously.Thus by by CPU and GPU
Isomery, the computing capability of processor 103 can be improved, realize that multichannel watermark is embedded in.
Various input/output devices are coupled to processor 103 and memory 101 by Peripheral Interface 104.In some implementations
In example, Peripheral Interface 104, processor 103 and storage control 102 can be realized in one single chip.In some other reality
In example, they can be realized by independent chip respectively.
Radio frequency unit 105 is used to receiving and sending electromagnetic wave, realizes the mutual conversion of electromagnetic wave and electric signal, so that with
Communication network or other equipment are communicated.
It is appreciated that the structure shown in Fig. 1 is only to illustrate, watermark embedded system 100 may also include more more than shown in Fig. 1
Either less component or there is the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can use hardware, software
Or its combination is realized.
First embodiment
The embodiments of the invention provide a kind of watermark embedding device 200, for being embedded in watermark to video source.Referring to Fig. 2,
The watermark embedding device 200 includes converting unit 210, watermark embedder unit 220 and inverse transform unit 230.
Converting unit 210 is used to input video source being converted to multiple transform domain images.
In a kind of preferred embodiment, referring to Fig. 3, converting unit 210 includes decapsulation subelement 211, solution entropy is compiled
Numeral unit 212 and inverse quantization subelement 213.
Wherein, subelement 211 is decapsulated to be used to decapsulate input video source and generate multiple video codeword data streams
Bag.
It is to be appreciated that input video source generally has certain encapsulation format, directly can be broadcast by associated video playout software
Put；The encapsulation format can be but be not limited only to AVI, MP4 or MKV etc..
Due to can not directly handle the video file of encapsulation, thus needs first pass through decapsulation subelement 211 and input are regarded
Frequency source carries out decapsulation operation, so as to first obtain video codeword data stream bag, is easy to processor 103 to be further processed.
Solution entropy code subelement 212 is used to each video codeword data stream bag is carried out to solve entropy code operation.
Video codeword data stream bag solve entropy code and operate and is：Pair anti-entropy code is carried out to video codeword data stream, i.e.,
Video codeword data stream bag is decompressed, and video codeword data stream bag is changed into the data after quantifying.
Inverse quantization subelement 213 is used to carry out inverse quantization operation to the video codeword data stream bag after each solution entropy code
So as to generate the transform domain image.
By carrying out inverse quantization to the data after quantization, the higher order accuracy of data can be increased, increase the scale of data, together
When obtain transform domain image.
Converting unit 210 is additionally operable to the watermark data of input being converted to transform domain watermark.
By the way that watermark data is converted into transform domain watermark, so that transform domain watermark and transform domain image form phase
Together, it is easy to transform domain watermark and transform domain image the operation such as to be overlapped.
In a kind of preferred embodiment, referring to Fig. 4, converting unit 210 also includes watermarking images generation subelement 214
And transform domain watermark generation subelement 215.
Watermarking images generation subelement 214 is used for according to watermark data generation watermarking images.
For example, watermark data includes text information " XX products ", then generating subelement 214 by watermarking images can be according to
A watermarking images are generated according to the text information of " XX products ", and the content of image then includes " XX products ".
It should be noted that the watermarking images of generation include background parts and watermarking section.Wherein, background parts have been
All-transparent, watermarking section is opaque, it is possible to understand that ground, above-mentioned described " XX products " are then properly termed as watermarking section.
It should also be noted that, the watermarking images are to be transformed into the image after YUV color spaces.
In addition it is also necessary to explanation, it can also be multiple that the watermarking section that the watermarking images include, which can be 1,；Water
Print part has multiple, then multiple watermarking sections can arrange according to modes such as four palace lattice, nine grids, 16 palace lattice.
Transform domain watermark generates subelement 215, and transform domain water is generated for carrying out discrete cosine transform to watermarking images
Print.
It is identical with transform domain image form by the transform domain watermark generation transform domain watermark of subelement 215, it is easy to become
Change domain watermark and transform domain image and the operation such as be overlapped.
Watermark embedder unit 220 is used to transform domain watermark being embedded in each transform domain image so as to obtain the change of embedded watermark
Change image.
In a kind of preferred embodiment, referring to Fig. 5, watermark embedder unit 220, which includes pixel value, obtains subelement
222nd, judgment sub-unit 224 and pixel value determination subelement 226.
Pixel value obtains the first pixel value that subelement 222 is used to obtain transform domain watermark one by one.
Judgment sub-unit 224 is used to judge whether first pixel value is 0.
If pixel value determination subelement 226 be used for the first pixel value be 0 when, keep transform domain image corresponding points pixel value
It is constant.
If the first pixel value is 0, it is transparent, as background parts to show the pixel, now need not be to conversion
The corresponding pixel points of area image do any processing, keep the pixel value of transform domain image corresponding points constant.
If pixel value determination subelement 226 be additionally operable to the first pixel value for 1 when, by the first pixel value and transform domain image pair
The pixel value that should be put, which is added, obtains the second pixel value, and the second pixel value is assigned into transform domain image corresponding points.
If the first pixel value is 1, it is not transparent, as watermarking section to show the pixel, is now needed the point
Pixel value be added with the pixel value of transform domain image corresponding points, and corresponding points of the assignment transform domain image.
After aforesaid operations are carried out to each point of transform domain image, it just can obtain being embedded in the Transformation Graphs of watermark
Picture.
In addition, in a kind of preferred embodiment, watermark embedder unit 220 is additionally operable to simultaneously that transform domain watermark difference is embedding
Enter each transform domain image so as to obtain the changing image of embedded watermark.
By the way that multiple transform domain images simultaneously be embedded in the processing of watermark data, embedded watermark can be greatly improved
Efficiency, realize multichannel watermark while insertion.
Inverse transform unit 230 is used to the changing image of embedded watermark being converted to output video.
Specifically, referring to Fig. 6, inverse transform unit 230 includes encapsulation subelement 236, entropy code subelement 234 and amount
Beggar's unit 232.
Quantify subelement 232 to be used to carry out quantization operation to the changing image of embedded watermark.
Entropy code subelement 234 is used for the changing image progress entropy code operation to the insertion watermark after quantization and generates and regard
Frequency code stream packets.
By carrying out entropy code to the changing image of embedded watermark again, nothing can be carried out to the changing image of embedded watermark
Damage compression, reduce the scale of the changing image of embedded watermark.
Encapsulation subelement 236 is used to be packaged video codeword data stream bag and generate output video.
The output video that can be embedded in watermark again by encapsulating subelement 236 has certain encapsulation format, can be straight
Connect and played by associated video playout software.
Second embodiment
A kind of watermark embedding method provided in an embodiment of the present invention, applied to watermark embedded system 100.Need what is illustrated
It is the watermark embedding method that the present embodiment is provided, its general principle and caused technique effect are identical with above-described embodiment, are
Briefly describe, the present embodiment part does not refer to part, refers to corresponding contents in the above embodiments.Referring to Fig. 7, the water
Print embedding grammar includes：
Step S701：Input video source is converted into multiple transform domain images.
It is to be appreciated that step S701 can be performed by converting unit 210.
In a kind of preferred embodiment, referring to Fig. 8, step S701 includes following sub-step：
Sub-step S7011：Input video source is decapsulated and generates multiple video codeword data stream bags.
It is to be appreciated that sub-step S7011 can be performed by decapsulating subelement 211.
Sub-step S7012：Each video codeword data stream bag is carried out to solve entropy code operation.
It is to be appreciated that sub-step S7012 can be performed by solving entropy code subelement 212.
Sub-step S7013：Inverse quantization operation is carried out so as to raw to the video codeword data stream bag after each solution entropy code
Into the transform domain image.
It is to be appreciated that sub-step S7013 can be performed by inverse quantization subelement 213.
Step S702：The watermark data of input is converted into transform domain watermark.
It is to be appreciated that step S702 can be performed by converting unit 210.
In a kind of preferred embodiment, referring to Fig. 9, step S702 includes following sub-step：
Sub-step S7021：According to watermark data generation watermarking images.
It is to be appreciated that sub-step S7021 can be performed by generating subelement 214 by watermarking images.
Sub-step S7022：Discrete cosine transform is carried out to watermarking images and generates transform domain watermark.
It is to be appreciated that sub-step S7022 can be performed by generating subelement 215 by transform domain watermark.
Step S703：Transform domain watermark is embedded in each transform domain image so as to obtain the changing image of embedded watermark.
It is to be appreciated that step S703 can be performed by watermark embedder unit 220.
In a kind of preferred embodiment, referring to Fig. 10, step S703 includes following sub-step：
Sub-step S7031：The first pixel value of transform domain watermark is obtained one by one.
It is to be appreciated that sub-step S7031 can be performed by obtaining subelement 222 by pixel value.
Sub-step S7032：Judge whether first pixel value is 0, if it is, performing sub-step S7033；If
It is no, then perform sub-step S7034.
It is to be appreciated that sub-step S7032 can be performed by judgment sub-unit 224.
Sub-step S7033：Keep the pixel value of transform domain image corresponding points constant.
It is to be appreciated that sub-step S7033 can be performed by pixel value determination subelement 226.
Sub-step S7034：First pixel value is added with the pixel value of transform domain image corresponding points and obtains the second pixel value,
And the second pixel value is assigned to transform domain image corresponding points.
It is to be appreciated that sub-step S7034 can be performed by pixel value determination subelement 226.
Step S704：The changing image of embedded watermark is converted into output video.
It is to be appreciated that step S704 can be performed by inverse transform unit 230.
In a kind of preferred embodiment, Figure 11 is referred to, step S704 includes following sub-step：
Sub-step S7041：Quantization operation is carried out to the changing image of embedded watermark.
It is to be appreciated that throughput beggar unit 232 can perform sub-step S7041.
Sub-step S7042：Entropy code operation is carried out to the changing image of the insertion watermark after quantization and generates video code flow
Packet.
It is to be appreciated that sub-step S7042 can be performed by entropy code subelement 234.
Sub-step S7043：Video codeword data stream bag is packaged and generates output video.
It is to be appreciated that sub-step S7043 can be performed by encapsulating subelement 236.
In summary, watermark embedding method and device provided by the invention, by respectively changing video source, watermark data
For transform domain image and transform domain watermark, then transform domain watermark is embedded in transform domain image so as to obtain the Transformation Graphs of embedded watermark
Picture, so as to during embedded watermark, avoid prediction and quantify the two amounts of calculation are larger, take more, complexity compared with
High step；Simultaneously during the changing image of embedded watermark is converted into output video, equally no longer need to predict and measure
Change the two steps, so as to substantially increase the speed of embedded watermark and efficiency, save processing time.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, can also pass through
Other modes are realized.Device embodiment described above is only schematical, for example, flow chart and block diagram in accompanying drawing
Show the device of multiple embodiments according to the present invention, method and computer program product architectural framework in the cards,
Function and operation.At this point, each square frame in flow chart or block diagram can represent the one of a unit, program segment or code
Part, a part for the unit, program segment or code include one or more and are used to realize holding for defined logic function
Row instruction.It should also be noted that at some as in the implementation replaced, the function that is marked in square frame can also with different from
The order marked in accompanying drawing occurs.For example, two continuous square frames can essentially perform substantially in parallel, they are sometimes
It can perform in the opposite order, this is depending on involved function.It is it is also noted that every in block diagram and/or flow chart
The combination of individual square frame and block diagram and/or the square frame in flow chart, function or the special base of action as defined in performing can be used
Realize, or can be realized with the combination of specialized hardware and computer instruction in the system of hardware.
In addition, each functional unit in each embodiment of the present invention can integrate to form an independent portion
Point or unit individualism, can also two or more units be integrated to form an independent part.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to be contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are causing a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.It should be noted that：Similar label and letter exists
Similar terms is represented in following accompanying drawing, therefore, once being defined in a certain Xiang Yi accompanying drawing, is then not required in subsequent accompanying drawing
It is further defined and explained.
Claims (10)
1. a kind of watermark embedding method, it is characterised in that the watermark embedding method includes：
Input video source is converted into multiple transform domain images；
The watermark data of input is converted into transform domain watermark；
The transform domain watermark is embedded in the transform domain image so as to obtain the changing image of embedded watermark；
The changing image of the embedded watermark is converted into output video.
2. watermark embedding method as claimed in claim 1, it is characterised in that described that input video source is converted into multiple conversion
The step of area image, includes：
The input video source is decapsulated and generates multiple video codeword data stream bags；
Each video codeword data stream bag is carried out simultaneously to solve entropy code operation；
Inverse quantization operation is carried out so as to generate the transform domain image to the video codeword data stream bag after each solution entropy code.
3. watermark embedding method as claimed in claim 1, it is characterised in that described that the watermark data of input is converted into conversion
The step of domain watermark, includes：
Watermarking images are generated according to the watermark data；
Discrete cosine transform is carried out to the watermarking images and generates the transform domain watermark.
4. watermark embedding method as claimed in claim 1, it is characterised in that described that the transform domain watermark is embedded in the change
Change area image includes so as to obtain the step of the changing image of embedded watermark：
The first pixel value of the transform domain watermark is checked one by one；
If first pixel value is 0, keep the pixel value of the transform domain image corresponding points constant；
If first pixel value is 1, first pixel value is added with the pixel value of the transform domain image corresponding points
The second pixel value is obtained, and second pixel value is assigned to the transform domain image corresponding points.
5. watermark embedding method as claimed in claim 1, it is characterised in that the watermark embedding method also includes：
It is described to wrap the transform domain watermark insertion transform domain image the step of changing image of embedded watermark so as to obtain
Include：
The transform domain watermark is respectively embedded into each transform domain image so as to obtain the changing image of embedded watermark simultaneously；
The changing image of multiple embedded watermarks is reversed to the output video for being changed to embedded watermark simultaneously.
6. a kind of watermark embedding device, it is characterised in that the watermark embedding device includes：
Converting unit, input video source is converted into multiple transform domain images；
The converting unit is additionally operable to the watermark data of input being converted to transform domain watermark；
Watermark embedder unit, for the transform domain watermark to be embedded in into the transform domain image so as to obtain the conversion of embedded watermark
Image；
Inverse transform unit, for the changing image of the embedded watermark to be converted into output video.
7. watermark embedding device as claimed in claim 6, it is characterised in that the converting unit includes：
Subelement is decapsulated, multiple video codeword data stream bags are generated for being decapsulated to the input video source；
Entropy code subelement is solved, for carrying out solving entropy code operation to each video codeword data stream bag simultaneously；
Inverse quantization subelement, for carrying out inverse quantization operation to the video codeword data stream bag after each solution entropy code so as to raw
Into the transform domain image.
8. watermark embedding device as claimed in claim 6, it is characterised in that the converting unit includes：
Watermarking images generate subelement, for generating watermarking images according to the watermark data；
Transform domain watermark generates subelement, and the transform domain water is generated for carrying out discrete cosine transform to the watermarking images
Print.
9. watermark embedding device as claimed in claim 6, it is characterised in that the watermark embedder unit includes：
Pixel value obtains subelement, for obtaining the first pixel value of the transform domain watermark one by one；
Pixel value determination subelement, if be 0 for first pixel value, keep the pixel of the transform domain image corresponding points
It is worth constant；
If the pixel value determination subelement be additionally operable to first pixel value for 1 when, by first pixel value and the change
The pixel value for changing area image corresponding points is added the second pixel value of acquisition, and second pixel value is assigned into the transform domain figure
As corresponding points.
10. watermark embedding device as claimed in claim 6, it is characterised in that the watermark embedding device also includes：
The watermark embedder unit be additionally operable to simultaneously by the transform domain watermark be respectively embedded into multiple transform domain images so as to
Obtain the changing image of embedded watermark；
The inverse transform unit, which is additionally operable to simultaneously reverse the changing image of multiple embedded watermarks, is changed to the defeated of embedded watermark
Go out video.
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| CN113012016A (en) * | 2021-03-25 | 2021-06-22 | 北京有竹居网络技术有限公司 | Watermark embedding method, device, equipment and storage medium |
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