CN109493875A - Addition, extracting method and the terminal device of audio frequency watermark - Google Patents
Addition, extracting method and the terminal device of audio frequency watermark Download PDFInfo
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- CN109493875A CN109493875A CN201811187250.5A CN201811187250A CN109493875A CN 109493875 A CN109493875 A CN 109493875A CN 201811187250 A CN201811187250 A CN 201811187250A CN 109493875 A CN109493875 A CN 109493875A
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- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention is suitable for technical field of data processing, provide the adding method and terminal device of a kind of audio frequency watermark, by in the adding procedure of audio frequency watermark, encryption is carried out to the data of audio frequency watermark and generates coded signal, shaping is carried out to coded signal according to the original audio signal got, generate standard signal, further according to the corresponding numerical value in position each in original audio signal and standard signal, standard signal is added in original audio signal, generate insertion signal, so that the data containing audio frequency watermark in insertion signal, it can be after insertion signal changes, it is compared by comparing the audio frequency watermark extracted from insertion signal with original audio frequency watermark, the case where original audio data is tampered is recognized accurately.
Description
Technical field
The invention belongs to technical field of data processing more particularly to a kind of additions of audio frequency watermark, extracting method and terminal
Equipment.
Background technique
The life that us are constantly penetrated into recently as mobile Internet, using audio, video, picture as the number of representative
Change information and obtained extreme enrichment, people can very easily create, obtain and propagate these digital informations.
But consequent is that the stolen risk of these digital informations greatly increases, therefore currently needs relevant skill
The copyright of art means protection creator.It is easy to be maliciously tampered currently, there is the label of legal audio, and is difficult to out
The problem of being tampered.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of addition of audio frequency watermark, extracting method and terminal device, with solution
Label certainly of the existing technology for legal audio, which exists, to be easy to be maliciously tampered, and be difficult to out be tampered asks
Topic.
The first aspect of the embodiment of the present invention provides a kind of adding method of audio frequency watermark, comprising:
The data of original audio signal and audio frequency watermark are obtained, and the data of the audio frequency watermark are encrypted, it is raw
At coded signal；
Shaping is carried out to the coded signal according to the original audio signal, generates standard signal；
According to the corresponding numerical value in position each in the original audio signal and the standard signal, by the standard signal
It is added in the original audio signal, generates the insertion signal for being added with the audio frequency watermark.
The second aspect of the embodiment of the present invention provides a kind of extracting method of audio frequency watermark, comprising:
Original audio signal and insertion signal are obtained, includes the data of audio frequency watermark in the insertion signal；According to institute
The corresponding numerical value in each position in original audio signal and the insertion signal is stated, standard letter is extracted from the insertion signal
Number；According to the original audio signal to the standard signal carry out shaping, generate coded signal, and to the coded signal into
Row decryption, obtains the data of audio frequency watermark.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory and processor, described to deposit
The computer program that can be run on the processor is stored in reservoir, when the processor executes the computer program,
Realize following steps:
The data of original audio signal and audio frequency watermark are obtained, and the data of the audio frequency watermark are encrypted, it is raw
At coded signal；Shaping is carried out to the coded signal according to the original audio signal, generates standard signal；According to the original
The corresponding numerical value in each position, is added to the original audio for the standard signal in beginning audio signal and the standard signal
In signal, the insertion signal for being added with the audio frequency watermark is generated.
The fourth aspect of the embodiment of the present invention provides a kind of terminal device, including memory and processor, described to deposit
The computer program that can be run on the processor is stored in reservoir, when the processor executes the computer program,
Realize following steps:
Original audio signal and insertion signal are obtained, includes the data of audio frequency watermark in the insertion signal；According to institute
The corresponding numerical value in each position in original audio signal and the insertion signal is stated, standard letter is extracted from the insertion signal
Number；According to the original audio signal to the standard signal carry out shaping, generate coded signal, and to the coded signal into
Row decryption, obtains the data of audio frequency watermark.
5th aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the computer program realizes following steps when being executed by processor:
The data of original audio signal and audio frequency watermark are obtained, and the data of the audio frequency watermark are encrypted, it is raw
At coded signal；Shaping is carried out to the coded signal according to the original audio signal, generates standard signal；According to the original
The corresponding numerical value in each position, is added to the original audio for the standard signal in beginning audio signal and the standard signal
In signal, the insertion signal for being added with the audio frequency watermark is generated.
6th aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the computer program realizes following steps when being executed by processor:
Original audio signal and insertion signal are obtained, includes the data of audio frequency watermark in the insertion signal；According to institute
The corresponding numerical value in each position in original audio signal and the insertion signal is stated, standard letter is extracted from the insertion signal
Number；According to the original audio signal to the standard signal carry out shaping, generate coded signal, and to the coded signal into
Row decryption, obtains the data of audio frequency watermark.
In embodiments of the present invention, by being encrypted to the data of audio frequency watermark in the adding procedure of audio frequency watermark
Coded signal is generated, shaping is carried out to coded signal according to the original audio signal got, standard signal is generated, further according to original
The corresponding numerical value in each position, standard signal is added in original audio signal in beginning audio signal and standard signal, is generated
Be embedded in signal so that insertion signal in the data containing audio frequency watermark, can insertion signal change after, by compare from
The audio frequency watermark extracted in insertion signal is compared with original audio frequency watermark, so that original audio number be recognized accurately
The case where according to being tampered.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation flow chart of the adding method of audio frequency watermark provided in an embodiment of the present invention；
Fig. 2 is the specific implementation flow chart of the adding method S101 of audio frequency watermark provided in an embodiment of the present invention；
Fig. 3 is the implementation flow chart of the extracting method of audio frequency watermark provided in an embodiment of the present invention；
Fig. 4 is the structural block diagram of the adding set of audio frequency watermark provided in an embodiment of the present invention；
Fig. 5 is the structural block diagram of the extraction element of audio frequency watermark provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of a terminal device provided in an embodiment of the present invention；
Fig. 7 is the schematic diagram of another terminal device provided in an embodiment of the present invention；
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Fig. 1 shows the implementation process of the adding method of audio frequency watermark provided in an embodiment of the present invention, this method process packet
Include step S101 to S103.The specific implementation principle of each step is as follows.
S101, obtains the data of original audio signal and audio frequency watermark, and adds to the data of the audio frequency watermark
It is close, generate coded signal.
In embodiments of the present invention, it is necessary first to obtain two data, respectively original audio signal and audio frequency watermark
Data, and the data of audio frequency watermark are added to original audio signal after series of computation, it generates and is added with audio frequency watermark
Insertion signal.
In embodiments of the present invention, it is contemplated that audio frequency watermark has stolen risk, any if audio frequency watermark is stolen
Usurping audio frequency watermark, the audio frequency watermark usurped can be added to the original sound after distorting after distorting original audio signal by person
Frequency signal, then the right-safeguarding person of legal original audio signal is difficult to judge or prove raw based on the original audio signal after being tampered
At insertion signal whether be legal insertion signal.Based on this, the embodiment of the present invention needs to be added according to distinctive preset first
Close algorithm encrypts the data of audio frequency watermark, to generate the coded signal that can be used for characterizing audio frequency watermark, to ensure sound
The safety of the data of frequency watermark.
Optionally, if after being encrypted according to data of the distinctive predetermined encryption algorithm to audio frequency watermark, generation is more
The matrix of dimension then needs to convert one-dimensional binary sequence as encryption for the matrix of multidimensional by principal component analytical method and believe
Number.
S102 carries out shaping to the coded signal according to the original audio signal, generates standard signal.
In embodiments of the present invention, original audio signal and the digital signal for frequency domain, coded signal be one-dimensional two into
Sequence processed, and the digit of the character of original audio signal is greater than character in the sequence of coded signal in embodiments of the present invention
Digit.
It is to be appreciated that facilitating that coded signal is added to original sound in subsequent steps to the shaping of coded signal
In frequency signal, specific reforming process includes:
In the end zero padding of the coded signal, until the digit of the coded signal after cover is believed equal to the original audio
Number digit；
Pass through preset shaping formula:Shaping is carried out to the coded signal,
Generate standard signal；The Sig ' [t] is t corresponding numerical value of the standard signal, describedFor the preset calculating factor；
The OriSig [t] is t corresponding numerical value of the original audio signal, and the Sig [t] is the encryption letter after the cover
Number t corresponding numerical value.
S103, according to the corresponding numerical value in position each in the original audio signal and the standard signal, by the mark
Calibration signal is added in the original audio signal, generates the insertion signal for being added with the audio frequency watermark.
Optionally, in embodiments of the present invention, pass through preset embedding formula:Calculate the insertion signal
In the corresponding numerical value in each position.Wherein, operatorIndicate that downward rounding operation, stepsize indicate preset quantization step, D
(i) the corresponding numerical value of i-th bit in the insertion signal is indicated, the F (i) indicates that i-th bit is corresponding in the original audio signal
Numerical value, the Sig ' [t] indicates the corresponding numerical value of i-th bit in the standard signal.
It is to be appreciated that the algorithm of signal is embedded according to above-mentioned generation, when the corresponding numerical value of i-th bit is 0 in standard signal
When, pass throughIt calculates insertion signal i-th bit and answers corresponding numerical value；
When the corresponding numerical value of i-th bit is 1 in standard signal, pass through Meter
It calculates insertion signal i-th bit and answers corresponding numerical value.
It is to be appreciated that in embodiments of the present invention, by the adding procedure of audio frequency watermark, to the number of audio frequency watermark
Coded signal is generated according to encryption is carried out, shaping is carried out to coded signal according to the original audio signal got, generates standard letter
Number, further according to the corresponding numerical value in position each in original audio signal and standard signal, standard signal is added to original audio
In signal, insertion signal is generated, so that the data containing audio frequency watermark in insertion signal, can change in insertion signal
Afterwards, it is compared by comparing the audio frequency watermark extracted from insertion signal with original audio frequency watermark, original is recognized accurately
The case where audio data of beginning is tampered.
As an embodiment of the present invention, as shown in Fig. 2, above-mentioned S101 includes:
S011 generates argument sequence by preset Serial No. formula.
Optionally, the preset Serial No. formula includes: seqn+1=index × seqn×(1-seqn), it is described
seqnFor n-th of number in the argument sequence, the index is the natural number greater than 1, wherein the 1st of the argument sequence
A number is greater than 0 and the natural number less than 1 to be preset.
It is to be appreciated that in setting index and seqnThe 1st number after, can be given birth to by above-mentioned Serial No. formula
At the multiple numbers being arranged successively, the Digital size thus one Serial No. of composition, and in the Serial No. is different and simultaneously
Without specific variation tendency.
S1012 intercepts the number equal with the character number that the data of the audio frequency watermark include from the argument sequence
Word, as selected sequence.
It is to be appreciated that the Serial No. of random length can be generated by above-mentioned Serial No. formula, and in this hair
It only needs to intercept the number equal with the character number that the data of the audio frequency watermark include in bright embodiment, as selected sequence
Column.
The data of the audio frequency watermark are converted to watermark matrix, and the selected sequence are converted to parameter square by S1013
Battle array, the watermark matrix are equal with the line number of the parameter matrix.
Illustratively, it is assumed that the data of audio frequency watermark and selected sequence include 10000 numbers, then according to preset
The number for including by the two that puts in order inserts matrix, and the watermark matrix and parameter matrix of 100 rows 100 column can be generated.
S1014 rearranges each element value according to the size of each element value in the parameter matrix, and generation is reflected
Matrix is penetrated, and according to the positional relationship of identical element value in the parameter matrix and the mapping matrix, generates position mapping
Rule.
Illustratively, in order to more clearly illustrate the generating process of position mapping ruler, the ginseng that is arranged herein with 3 rows 3
Matrix number citing, it is assumed that parameter matrix are as follows:If according to each element value size by each element value by it is small to
It rearranges greatly, then the mapping matrix generated are as follows:By by each element in parameter matrix and mapping matrix
Value compares, and the identical position of element value in two matrixes is mapped, it is known that in this example, the 1st row before conversion
The element value of 1st column is corresponding with the element value of the 3rd row the 2nd column after conversion；The element value and turn that the 1st row the 2nd before conversion arranges
The element value of the 3rd row the 1st column after changing is corresponding；The element value of the 1st row the 3rd column before conversion and the first row the 1st after conversion arrange
Element value it is corresponding, and so on, generate 9 position mapping rulers.
S1015 is rearranged each element value in the watermark matrix by the position mapping ruler, and
The element value in matrix generated after rearranging is sequentially output according to putting in order, and generates coded signal.
It is to be appreciated that generate position mapping ruler in example above, due in embodiments of the present invention, watermark
The row and column of matrix and parameter matrix is equal, therefore can will be each in watermark matrix by identical position mapping ruler
Element value is moved, to be rearranged, and the element of the matrix after rearranging is put in order according to preset
It is sequentially output, generates coded signal.
In embodiments of the present invention, it is encrypted by data of the above-mentioned encryption method to audio frequency watermark, so that unauthorized
User can not be accurately obtained coded signal knowing the data of audio frequency watermark, thus can not distort original audio letter
Original audio signal after distorting accurate coded signal filling after number is facilitated deciding on based on original audio signal generation
Whether insertion signal is tampered with.
Fig. 3 shows the implementation process of the extracting method of audio frequency watermark provided in an embodiment of the present invention, this method process packet
Include step S301 to S303.The specific implementation principle of each step is as follows.
S301, obtains original audio signal and insertion signal, includes the data of audio frequency watermark in the insertion signal.
In embodiments of the present invention, when need to verify one comprising audio frequency watermark data insertion signal whether once by
When distorting, the original audio signal being based on during generating the insertion signal can be transferred.
S302, according to the corresponding numerical value in position each in the original audio signal and the insertion signal, from described embedding
Enter and extracts standard signal in signal.
Optionally, pass through preset parameter calculation formula:Calculate institute
The corresponding discriminant parameter in each position in insertion signal is stated, the r (i) is the corresponding discriminant parameter of i-th bit in the insertion signal,
The F (i) is the corresponding numerical value of i-th bit in the original audio signal, and D (i) is the corresponding number of i-th bit in the insertion signal
Value, the stepsize are preset quantization step, operatorIndicate downward rounding operation；
Optionally, pass through preset watermark extracting formula:It calculates each
The corresponding numerical value of a discriminant parameter, and the corresponding numerical value of the discriminant parameter is arranged, standard signal is obtained, it is described
J (i) is the corresponding numerical value of the audio frequency watermark i-th bit.
It is to be appreciated that in embodiments of the present invention, if the corresponding discriminant parameter of i-th bit is greater than or equal in insertion signal
The corresponding numerical value of audio frequency watermark i-th bit is then designated as 1 by the half of quantization step, it is on the contrary then by the corresponding number of audio frequency watermark i-th bit
Value is designated as 0.
S303 carries out shaping to the standard signal according to the original audio signal, generates coded signal, and to described
Coded signal is decrypted, and obtains the data of audio frequency watermark.
In embodiments of the present invention, pass through preset shaping formula:Anti- behaviour
A signal is calculated as coded signal；The Sig ' [t] is t corresponding numerical value of the standard signal, describedFor
The preset calculating factor；The OriSig [t] is t corresponding numerical value of the original audio signal, and the Sig [t] is institute
T corresponding numerical value of coded signal after stating cover.
Implement kind in the present invention, coded signal is decrypted by preset decipherment algorithm, obtains the number of audio frequency watermark
According to.
Optionally, the corresponding preset position mapping ruler of the original audio signal, the position mapping ruler are transferred
In comprising matrix before switching after each element position mapping relations, and by numerical value each in the coded signal insert matrix
Middle generation scrambled matrix is adjusted the position of each element value in the scrambled matrix by the position mapping ruler
It is whole, generate watermark matrix；Finally each element value in watermark matrix is sequentially output, the data as audio frequency watermark.
In embodiments of the present invention, by extracting the data of audio frequency watermark from insertion signal, it is for verifying insertion signal
No be tampered provides data support, is conducive to the intellectual property for protecting original audio signal author.
Corresponding to the adding method of audio frequency watermark described in foregoing embodiments, Fig. 4 shows provided in an embodiment of the present invention
The structural block diagram of the adding set of audio frequency watermark, for ease of description, only parts related to embodiments of the present invention are shown.
Referring to Fig. 4, which includes:
Module 401 is obtained, for obtaining the data of original audio signal and audio frequency watermark, and to the audio frequency watermark
Data are encrypted, and coded signal is generated；
Shaping Module 402 generates standard letter for carrying out shaping to the coded signal according to the original audio signal
Number；
Adding module 403, for according to the corresponding number in position each in the original audio signal and the standard signal
Value, the standard signal is added in the original audio signal, generates the insertion signal for being added with the audio frequency watermark.
The data to the audio frequency watermark encrypt, and generate coded signal, comprising:
Pass through preset Serial No. formula: seqn+1=index × seqn×(1-seqn) argument sequence is generated, it is described
seqnFor n-th of number in the argument sequence, the index is the natural number greater than 1, wherein the 1st of the argument sequence
A number is greater than 0 and the natural number less than 1 to be preset；
The number equal with the character number that the data of the audio frequency watermark include is intercepted from the argument sequence, as
Selected sequence；
The data of the audio frequency watermark are converted into watermark matrix, and the selected sequence is converted into parameter matrix, institute
It is equal with the line number of the parameter matrix to state watermark matrix；
Each element value is rearranged according to the size of each element value in the parameter matrix, generates mapping square
Battle array, and according to the positional relationship of identical element value in the parameter matrix and the mapping matrix, generate position mapping ruler；
Each element value in the watermark matrix is rearranged by the position mapping ruler, and will again
The element value in matrix generated after arrangement is sequentially output according to putting in order, and generates coded signal.
It is described that shaping is carried out to the coded signal according to the original audio signal, generate standard signal, comprising:
In the end zero padding of the coded signal, until the digit of the coded signal after cover is believed equal to the original audio
Number digit；
Pass through preset shaping formula:Shaping is carried out to the coded signal,
Generate standard signal；The Sig ' [t] is t corresponding numerical value of the standard signal, describedFor the preset calculating factor；
The OriSig [t] is t corresponding numerical value of the original audio signal, and the Sig [t] is the encryption letter after the cover
Number t corresponding numerical value.
It is described according to the corresponding numerical value in position each in the original audio signal and the standard signal, by the standard
Signal is added in the original audio signal, generates the insertion signal for being added with the audio frequency watermark, comprising: by preset
Embedding formula:Calculate institute
State the corresponding numerical value in each position in insertion signal.Wherein, operatorIndicate that downward rounding operation, stepsize indicate preset
Quantization step, D (i) indicate the corresponding numerical value of i-th bit in the insertion signal, and the F (i) indicates in the original audio signal
The corresponding numerical value of i-th bit, the Sig ' [t] indicate the corresponding numerical value of i-th bit in the standard signal.
In embodiments of the present invention, by being encrypted to the data of audio frequency watermark in the adding procedure of audio frequency watermark
Coded signal is generated, shaping is carried out to coded signal according to the original audio signal got, standard signal is generated, further according to original
The corresponding numerical value in each position, standard signal is added in original audio signal in beginning audio signal and standard signal, is generated
Be embedded in signal so that insertion signal in the data containing audio frequency watermark, can insertion signal change after, by compare from
The audio frequency watermark extracted in insertion signal is compared with original audio frequency watermark, and original audio data quilt is recognized accurately
The case where distorting.
Corresponding to the extracting method of audio frequency watermark described in foregoing embodiments, Fig. 5 shows provided in an embodiment of the present invention
The structural block diagram of the extraction element of audio frequency watermark, for ease of description, only parts related to embodiments of the present invention are shown.
Referring to Fig. 5, which includes:
Module 501 is obtained, includes audio water in the insertion signal for obtaining original audio signal and insertion signal
The data of print；
Extraction module 502, for according to the corresponding number in position each in the original audio signal and the insertion signal
Value, extracts standard signal from the insertion signal；
Generation module 503 generates encryption letter for carrying out shaping to the standard signal according to the original audio signal
Number, and the coded signal is decrypted, obtain the data of audio frequency watermark.
It is described according to the corresponding numerical value in position each in the original audio signal and the insertion signal, from the insertion
Standard signal is extracted in signal, comprising:
Pass through preset parameter calculation formula:Calculate the insertion
The corresponding discriminant parameter in each position in signal, the r (i) are the corresponding discriminant parameter of i-th bit in the insertion signal, the F
It (i) is the corresponding numerical value of i-th bit in the original audio signal, D (i) is the corresponding numerical value of i-th bit in the insertion signal, institute
Stating stepsize is preset quantization step, operatorIndicate downward rounding operation；
Pass through preset watermark extracting formula:It calculates and each described sentences
The corresponding numerical value of other parameter, and the corresponding numerical value of the discriminant parameter is arranged, standard signal is obtained, the J (i) is institute
State the corresponding numerical value of audio frequency watermark i-th bit.
In embodiments of the present invention, by extracting the data of audio frequency watermark from insertion signal, it is for verifying insertion signal
No be tampered provides data support, is conducive to the intellectual property for protecting original audio signal author.
Fig. 6 is the schematic diagram of a terminal device provided in an embodiment of the present invention.As shown in fig. 6, the terminal of the embodiment
Equipment 6 includes: processor 60, memory 61 and is stored in the memory 61 and can run on the processor 60
Computer program 62, such as the addition program of audio frequency watermark.The processor 60 is realized when executing the computer program 62
State the step in the adding method embodiment of each audio frequency watermark, such as step 101 shown in FIG. 1 is to 103.Alternatively, the place
Reason device 60 realizes the function of each module/module in above-mentioned each Installation practice, such as Fig. 4 institute when executing the computer program 62
Show the function of module 401 to 403.
Fig. 7 is the schematic diagram of another terminal device provided in an embodiment of the present invention.As shown in fig. 7, the end of the embodiment
End equipment 7 includes: processor 70, memory 71 and is stored in the memory 71 and can run on the processor 70
Computer program 72, such as the addition program of audio frequency watermark.The realization when processor 70 executes the computer program 72
Step in the adding method embodiment of above-mentioned each audio frequency watermark, such as step 301 shown in FIG. 1 is to 303.Alternatively, described
Processor 70 realizes the function of each module/module in above-mentioned each Installation practice, such as Fig. 5 when executing the computer program 72
The function of shown module 501 to 503.
Illustratively, the computer program 62 can be divided into one or more module/modules, it is one or
Multiple module/modules are stored in the memory 61, and are executed by the processor 60, to complete the present invention.Described one
A or multiple module/modules can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 62 in the terminal device 6 is described.
The terminal device 6,7 can be the calculating such as desktop PC, notebook, palm PC and cloud terminal device
Equipment.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can module, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional module, module are completed, i.e., the internal structure of described device is divided into different functional module or module, more than completing
The all or part of function of description.Each functional module, module in embodiment can integrate in a processing module, can also
To be that modules physically exist alone, can also be integrated in two or more modules in a module, it is above-mentioned integrated
Module both can take the form of hardware realization, can also be realized in the form of software function module.In addition, each function mould
Block, module specific name be also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
Middle module, the specific work process of module, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
The module as illustrated by the separation member may or may not be physically separated, aobvious as module
The component shown may or may not be physical module, it can and it is in one place, or may be distributed over multiple
On network module.Some or all of the modules therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
If the integrated module/module realized in the form of software function module and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of adding method of audio frequency watermark characterized by comprising
The data of original audio signal and audio frequency watermark are obtained, and the data of the audio frequency watermark are encrypted, generates and adds
Secret letter number；
Shaping is carried out to the coded signal according to the original audio signal, generates standard signal；
According to the corresponding numerical value in position each in the original audio signal and the standard signal, the standard signal is added
Into in the original audio signal, the insertion signal for being added with the audio frequency watermark is generated.
2. the adding method of audio frequency watermark as described in claim 1, which is characterized in that the data to the audio frequency watermark
It is encrypted, generates coded signal, comprising:
Pass through preset Serial No. formula: seqn+1=index × seqn×(1-seqn) generate argument sequence, the seqnFor
N-th of number in the argument sequence, the index are the natural number greater than 1, wherein the 1st number of the argument sequence
It is greater than 0 and the natural number less than 1 to be preset；
The number equal with the character number that the data of the audio frequency watermark include is intercepted from the argument sequence, as selected
Sequence；
The data of the audio frequency watermark are converted into watermark matrix, and the selected sequence is converted into parameter matrix, the water
It is equal with the line number of the parameter matrix to print matrix；
Each element value is rearranged according to the size of each element value in the parameter matrix, generates mapping matrix, and
According to the positional relationship of identical element value in the parameter matrix and the mapping matrix, position mapping ruler is generated；
Each element value in the watermark matrix is rearranged by the position mapping ruler, and will be rearranged
The element value in matrix generated afterwards is sequentially output according to putting in order, and generates coded signal.
3. the adding method of audio frequency watermark as described in claim 1, which is characterized in that described according to the original audio signal
Shaping is carried out to the coded signal, generates standard signal, comprising:
In the end zero padding of the coded signal, until the digit of the coded signal after cover is equal to the original audio signal
Digit；
Pass through preset shaping formula:Shaping is carried out to the coded signal, is generated
Standard signal；The Sig ' [t] is t corresponding numerical value of the standard signal, describedFor the preset calculating factor；It is described
OriSig [t] is t corresponding numerical value of the original audio signal, and the Sig [t] is the coded signal after the cover the
T corresponding numerical value.
4. the adding method of audio frequency watermark as described in claim 1, which is characterized in that described according to the original audio signal
And the corresponding numerical value in each position in the standard signal, the standard signal is added in the original audio signal, it is raw
At the insertion signal for being added with the audio frequency watermark, comprising: pass through preset embedding formula:Calculate the insertion signal
In the corresponding numerical value in each position.Wherein, operatorIndicate that downward rounding operation, stepsize indicate preset quantization step,
D (i) indicates the corresponding numerical value of i-th bit in the insertion signal, and the F (i) indicates that i-th bit is corresponding in the original audio signal
Numerical value, the Sig ' [t] indicates the corresponding numerical value of i-th bit in the standard signal.
5. a kind of extracting method of audio frequency watermark characterized by comprising
Original audio signal and insertion signal are obtained, includes the data of audio frequency watermark in the insertion signal；
According to the corresponding numerical value in position each in the original audio signal and the insertion signal, mentioned from the insertion signal
Take out standard signal；
Shaping is carried out to the standard signal according to the original audio signal, generates coded signal, and to the coded signal
It is decrypted, obtains the data of audio frequency watermark.
6. the adding method of audio frequency watermark as described in claim 1, which is characterized in that described according to the original audio signal
And the corresponding numerical value in each position in the insertion signal, standard signal is extracted from the insertion signal, comprising:
Pass through preset parameter calculation formula:It calculates in the insertion signal
The corresponding discriminant parameter in each position, the r (i) are the corresponding discriminant parameter of i-th bit in the insertion signal, and the F (i) is institute
The corresponding numerical value of i-th bit in original audio signal is stated, D (i) is the corresponding numerical value of i-th bit in the insertion signal, described
Stepsize is preset quantization step, operatorIndicate downward rounding operation；
Pass through preset watermark extracting formula:Calculate each differentiation ginseng
The corresponding numerical value of number, and the corresponding numerical value of the discriminant parameter is arranged, standard signal is obtained, the J (i) is the sound
The corresponding numerical value of frequency watermark i-th bit.
7. a kind of terminal device, including memory and processor, it is stored with and can transports on the processor in the memory
Capable computer program, which is characterized in that when the processor executes the computer program, realize following steps:
The data of original audio signal and audio frequency watermark are obtained, and the data of the audio frequency watermark are encrypted, generates and adds
Secret letter number；
Shaping is carried out to the coded signal according to the original audio signal, generates standard signal；
According to the corresponding numerical value in position each in the original audio signal and the standard signal, the standard signal is added
Into in the original audio signal, the insertion signal for being added with the audio frequency watermark is generated.
8. a kind of terminal device, including memory and processor, it is stored with and can transports on the processor in the memory
Capable computer program, which is characterized in that when the processor executes the computer program, realize following steps:
Original audio signal and insertion signal are obtained, includes the data of audio frequency watermark in the insertion signal；
According to the corresponding numerical value in position each in the original audio signal and the insertion signal, mentioned from the insertion signal
Take out standard signal；
Shaping is carried out to the standard signal according to the original audio signal, generates coded signal, and to the coded signal
It is decrypted, generates the data of audio frequency watermark.
9. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as Claims 1-4 of realization the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 5 or 6 of realization the method.
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| CN201811187250.5A CN109493875B (en) | 2018-10-12 | 2018-10-12 | Audio watermark adding and extracting method and terminal equipment |
| PCT/CN2018/124303 WO2020073508A1 (en) | 2018-10-12 | 2018-12-27 | Method and device for adding and extracting audio watermark, electronic device and medium |
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| WO2020073508A1 (en) | 2020-04-16 |
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