CN108235022A - A kind of computer video data processing method - Google Patents
A kind of computer video data processing method Download PDFInfo
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- CN108235022A CN108235022A CN201810084453.5A CN201810084453A CN108235022A CN 108235022 A CN108235022 A CN 108235022A CN 201810084453 A CN201810084453 A CN 201810084453A CN 108235022 A CN108235022 A CN 108235022A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
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- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of computer video data processing method, this method carries out compressed encoding to the video information of acquired original first, obtains the video data of high compression rate；This method treats transmitting video data using double-encryption, improves the difficulty of hack before transmitting video data：This method in the first re-encryption, treat enciphered video data element carry out displacement and the nonlinear transformation of certain number after, each unit as a result, obtaining the first re-encryption by inverible transform exports video data on obtained nonlinear shift register；The present invention is in the second re-encryption, using the last one ciphertext blocks in generated first re-encryption output video data as first object ciphertext blocks, first object ciphertext blocks are decrypted with the index value to obtain mark ciphertext blocks, the second re-encryption operation is carried out to the index value of the first re-encryption output video data.
Description
Technical field
The present invention relates to field of computer data processing, and in particular to a kind of computer video data processing method.
Background technology
With the development of information technology, video data increasingly becomes the main side that user in daily life obtains information
Formula, the data volume of usual video data is bigger (especially HD video etc.), in limited traffic channel characteristic requirements
Under carry out data transmission, be easy to cause channel block.In order to reduce the memory space of video data occupancy, and reduce transmission and regard
The transmission bandwidth that frequency occupies during can will be stored or be transmitted after video data compaction coding, be regarded playing this
Frequency according to when, then by video data decoding and play.
One is arranged in definite shape and with certain element number data set (such as：One frame image, a video
Sequence) when carrying out the coding of data compression, usually this data set is divided into the sons of several blocks with predetermined shape and size
Collection, referred to as encoding block, as unit of encoding and decoding block, one piece one piece is encoded or is decoded.
Video data is prevented by bootlegging broadcasting there are mainly two types of method at present：First, building video private network, carried out in network level
Isolation；But the construction cost of this method is too high, can not be promoted in commercial market.Second is that using privately owned transmission of video agreement, formulate
The people of transmission of video agreement, completely it can be seen that the video data of client；Privately owned transmission of video agreement can be cracked, after cracking
All video datas all may be big by bootlegging broadcasting and other video platforms docking difficulty, limits very much user and uses video data.
Video data is encrypted, and refers to that by Encryption Algorithm and encryption key ciphertext will be changed into plain text, and video data solution
It is close, refer to revert to ciphertext in plain text by decipherment algorithm and decruption key.Video data encryption is that video data is protected
Shield ensures a kind of reliable method of the privacy of data.In conventional cryptography processing, there are various Encryption Algorithm, but
Often all relatively simple, once the key that is cracked, all video datas are just all obtained by a hacker, so as to cause information security hardly possible
To be guaranteed.In this case, a kind of complicated, reversible, safe video data encryption method is particularly important.
Invention content
The present invention provides a kind of computer video data processing method, this method first to the video information of acquired original into
Row compressed encoding obtains the video data of high compression rate；This method treats transmitting video data use before transmitting video data
Double-encryption improves the difficulty of hack：In the first re-encryption, the element for treating enciphered video data carries out this method
After the displacement of certain number and nonlinear transformation, each unit as a result, by reversible on obtained nonlinear shift register
Transformation obtains the first re-encryption output video data, improves data encryption rank；The present invention will give birth in the second re-encryption
Into the first re-encryption output video data in the last one ciphertext blocks as first object ciphertext blocks, to first object ciphertext
The index value to obtain mark ciphertext blocks is decrypted in block, and default operation is then carried out to the index value of first object ciphertext blocks and is obtained
First re-encryption exports the index value of video data, and the second re-encryption is carried out to the index value of the first re-encryption output video data
Operation, the index ciphertext of generation the first re-encryption output video data；By the first re-encryption output video data and index ciphertext
Merge, generation the second re-encryption output video data further improves encryption level of confidentiality.
To achieve these goals, the present invention provides a kind of computer video data processing method, and this method specifically includes
Following steps：
S1. original video information is obtained；
S2. compressed encoding is carried out to original video information, obtains the video data of high compression rate；
S3. two re-encryptions are carried out to video data；
S4. the double encrypted video data is transmitted；
S5. encrypted video data is received, and is decrypted, the video data after being decrypted；
S6. the video data after decryption is decoded, obtains original video information.
Preferably, in the step S2, specifically comprise the following steps：
S21. sample format is selected, selects coding mode corresponding with the sample format；
S22. coding is carried out to the encoding block of video data using the sample format of selection and the coding mode of selection and generates high pressure
The video data of shrinkage, wherein, the video data of the high compression rate includes：Sample format and/or coding mode, with sampling lattice
Formula and/or the corresponding syntactic element of coding mode.
Preferably, the original video information includes the coding by R component, G components, the video that B component forms and data
Block.
Preferably, the encoding block is the coding region of image, wherein, the coding region includes at least one of：
The subgraph of image, macro block, maximum coding unit LCU, coding tree unit CTU, the subregion of coding unit CU, CU, prediction are single
First PU, converter unit TU.
Preferably, the sample format is 4:4:4 sample formats and 4:2:0 sample format；Alternatively, the multiple format is
4:4:4 sample formats and 4:2:2 sample formats；Alternatively, the sample format is 4:2:2 sample formats and 4:2:0 sample format.
Preferably, the coding mode includes at least one of：It is carried out in frame according to the neighborhood pixels of the encoding block
Prediction；Inter-prediction is carried out according to the adjacent image of the coded image；Frame is carried out according to the adjacent image of the coded image
Between convert；Quantization；General string prediction；Palette encodes.
Preferably, the step S3 specifically comprises the following steps：
S31. terminal treats enciphered video data and carries out the first re-encryption, obtains the first re-encryption output video data；
S32. Hash operation is carried out to the first re-encryption output video data, obtains the rope of the first re-encryption output video data
Draw key；
S33. the second re-encryption is carried out to the first encryption output video data, obtains the second encryption output video data；
Preferably, in the step S31, specifically comprise the following steps：
S311. video data to be encrypted is converted into array by inverible transform, the array element number with it is described to be encrypted
The data bits of video data is identical, and each element of the array is the binary number of identical digit；
S312., each element of the array is input to each unit of nonlinear shift register；
S313. the array is grouped Encryption Algorithm operation；
S314. the operation result of the block encryption algorithm is subjected to compressed transform by compression function, obtained and the array
The identical compression of each element digit, obtains compressed output video data；
S315. the array element of the spilling unit of the compressed output video data and the nonlinear shift register is into professional etiquette
Then operation, and operation result is input to compensating unit；
S316. the compressed output video data of the compensating unit being input to are obtained according to the inverse transformation of the inverible transform
First re-encryption exports video data.
Preferably, in the step S32, specifically comprise the following steps：
S321. using the last one ciphertext blocks in generated first re-encryption output video data as first object ciphertext
First object ciphertext blocks are decrypted the index value to obtain mark ciphertext blocks in block；
S322. default operation is carried out to the index value of first object ciphertext blocks and obtains the index of the first re-encryption output video data
Value carries out the index value of the first re-encryption output video data the second re-encryption operation, generation the first re-encryption output video
The index ciphertext of data；
S323. the first re-encryption output video data and index ciphertext are merged, generation the second re-encryption output video data.
Preferably, include step following steps in the step S5：
S51. it carries out first to the second re-encryption output video data to decrypt again, obtains first and decrypt output video data again；
S52. it decrypts output video data progress second again to first to decrypt again, obtains initial data.
Preferably, in the step S51, specifically comprise the following steps：
S511. operation is decrypted to the second re-encryption output video data using the preset security key, obtains first
The data of decryption output video data and index ciphertext again；
S512. the data for decrypting output video data again to first carry out Hash operation, obtain the first decryption output video data
Index key；
S513. the index that the index key pair first for decrypting output video data again using first decrypts output video data again is close
Operation is decrypted in text, obtains the first index value for decrypting output video data again；
S514. first is decrypted again the previous ciphertext blocks of output video data as the second target ciphertext blocks, to the second target
The index value to obtain the second target ciphertext blocks is decrypted in ciphertext blocks；
Whether the index value for S515. judging to treat the first index value for decrypting output video data again and the second target ciphertext blocks meets
Preset condition, to determine that first decrypts whether output video data and index value are valid data again；
If S516. first again decryption output video data and index value be valid data, output first again decryption output decryption
Data, subsequently into step S52.
Preferably, in the step S52, specifically comprise the following steps：
S521. the close output video data of first heavy-duty machine is inputted into the nonlinear displacement register identical with the first re-encryption
In, then nonlinear shift register is inversely shifted, obtains the close output video data of the first heavy-duty machine after upstream shift；
S522. by the spilling unit of the close output video data of the first heavy-duty machine after upstream shift and the nonlinear shift register
Element carry out the inverse operation of the regular operation, and operation result is input to compensating unit, after being compensated.
S523. it by the data in the nonlinear shift register unit, is obtained according to the inverse transformation of the inverible transform
To initial data.
The present invention has the following advantages and beneficial effect：
（1）This method carries out compressed encoding to the video information of acquired original first, obtains the video data of high compression rate, and solve
Determined in the prior art using it is single be decoded using form and decoding process when efficiency it is too low the technical issues of.
（2）This method, using double-encryption, improves the difficulty of hack in data encryption process.This method is
In one re-encryption, after displacement and the nonlinear transformation for the treatment of the certain number of element progress of enciphered video data, what is obtained is non-thread
Property shift register on each unit as a result, by inverible transform obtain the first re-encryption export video data, improve number
According to encryption level.The present invention exports the last one in video data in the second re-encryption, by generated first re-encryption
As first object ciphertext blocks first object ciphertext blocks are decrypted the index value to obtain mark ciphertext blocks, then in ciphertext blocks
Default operation is carried out to the index value of first object ciphertext blocks and obtains the index value of the first re-encryption output video data, to first
The index value of re-encryption output video data carries out the second re-encryption operation, the index of generation the first re-encryption output video data
Ciphertext；First re-encryption output video data and index ciphertext are merged, generation the second re-encryption output video data, further
Improve encryption level of confidentiality.
Description of the drawings
Fig. 1 shows a kind of flow chart of computer video data processing method of the present invention.
Specific embodiment
Fig. 1 shows a kind of flow chart of computer video data processing method of the present invention.This method specifically include as
Lower step：
S1. original video information is obtained；
S2. compressed encoding is carried out to original video information, obtains the video data of high compression rate；
S3. two re-encryptions are carried out to video data；
S4. the double encrypted video data is transmitted；
S5. encrypted video data is received, and is decrypted, the video data after being decrypted；
S6. the video data after decryption is decoded, obtains original video information.
In the step S2, specifically comprise the following steps：
S21. sample format is selected, selects coding mode corresponding with the sample format；S22. the sample format of selection is used
The video data of coding generation high compression rate is carried out to the encoding block of video data with the coding mode of selection, wherein, the height
The video data of compression ratio includes：Sample format and/or coding mode, grammer corresponding with sample format and/or coding mode
Element.
The original video information includes the encoding block by R component, G components, the video that B component forms and data.It is described
Encoding block is the coding region of image, wherein, the coding region includes at least one of：The subgraph of image, macro block, most
Big coding unit LCU, coding tree unit CTU, the subregion of coding unit CU, CU, predicting unit PU, converter unit TU.
The sample format is 4:4:4 sample formats and 4:2:0 sample format；Alternatively, the multiple format is 4:4:4 adopt
Sample form and 4:2:2 sample formats；Alternatively, the sample format is 4:2:2 sample formats and 4:2:0 sample format.
The coding mode includes at least one of：Intra prediction is carried out according to the neighborhood pixels of the encoding block；Root
Inter-prediction is carried out according to the adjacent image of the coded image；Inter-frame Transformation is carried out according to the adjacent image of the coded image；
Quantization；General string prediction；Palette encodes.
The step S3 specifically comprises the following steps：
S31. terminal treats enciphered video data and carries out the first re-encryption, obtains the first re-encryption output video data.
In the step S31, specifically comprise the following steps：
S311. video data to be encrypted is converted into array by inverible transform, the array element number with it is described to be encrypted
The data bits of video data is identical, and each element of the array is the binary number of identical digit.
Wherein, the form of video data to be encrypted can be number, letter and digits plus letters form or
Include the extended formatting of symbol etc..First inverible transform highlights conversion process and must be reversible, if mapping, then necessary
It is that injection and surjection just can be to can also be the transformation of other forms.
S312., each element of the array is input to each unit of nonlinear shift register.
Wherein, nonlinear shift register includes multiple units, and unit number can be by nonlinear shift register core
Piece determines, in order to each element for ensureing array can be input in the unit of nonlinear shift register, non-linear shifting
The use environment of the encryption method that the model of bit register can be provided according to embodiments of the present invention determines.
S313. the array is grouped Encryption Algorithm operation.
S314. by the operation result of the block encryption algorithm by compression function carry out compressed transform, obtain with it is described
The identical compression of each element digit of array, obtains compressed output video data.
S315. the array element of the spilling unit of the compressed output video data and the nonlinear shift register into
Line discipline operation, and operation result is input to compensating unit.Preferably, the regular operation can be add operation, multiplication
Operation, subtraction etc..For example, it may be compressed output video data and the spilling unit two of the nonlinear shift register
Addition between number rems process, and such as x+y=z mod L, wherein x is compressed output video data, and y is non-linear shift
The data of the spilling unit of register, z are the operation result of the first regular operation, and L is the element number of the first array.It overflows
Unit is the unit that is no longer stored in metadata after once shifting, compensating unit be after once shifting,
The unit being no longer stored in metadata.
S316. by the compressed output video data of the compensating unit being input to according to the inverse transformation of the inverible transform
Obtain the first re-encryption output video data.
S32. Hash operation is carried out to the first re-encryption output video data, obtains the first re-encryption output video data
Index key.
Preferably, in the step S32, specifically comprise the following steps：
S321. using the last one ciphertext blocks in generated first re-encryption output video data as first object ciphertext
First object ciphertext blocks are decrypted the index value to obtain mark ciphertext blocks in block；Preferably, in step S321, including：Profit
The first object ciphertext blocks are decrypted with preset security key, index ciphertext and the data for obtaining first object ciphertext blocks are bright
Text；Hash operation is carried out to the data clear text of first object ciphertext blocks, obtains the index key of first object ciphertext blocks；Utilize
The index ciphertext of the index secret key decryption first object ciphertext blocks of one target ciphertext blocks, obtains the index of first object ciphertext blocks
Value.
S322. default operation is carried out to the index value of first object ciphertext blocks and obtains the first re-encryption output video data
Index value carries out the index value of the first re-encryption output video data the second re-encryption operation, generation the first re-encryption output
The index ciphertext of video data；
S323. the first re-encryption output video data and index ciphertext are merged, generation the second re-encryption output video data.
S33. the second re-encryption is carried out to the first encryption output video data, obtains the second encryption output video data
Include step following steps in the step S5：
S51. it carries out first to the second re-encryption output video data to decrypt again, obtains first and decrypt output video data again；
S52. it decrypts output video data progress second again to first to decrypt again, obtains initial data.
Preferably, in the step S51, specifically comprise the following steps：
S511. operation is decrypted to the second re-encryption output video data using the preset security key, obtains first
The data of decryption output video data and index ciphertext again；
S512. the data for decrypting output video data again to first carry out Hash operation, obtain the first decryption output video data
Index key；
S513. the index that the index key pair first for decrypting output video data again using first decrypts output video data again is close
Operation is decrypted in text, obtains the first index value for decrypting output video data again；
S514. first is decrypted again the previous ciphertext blocks of output video data as the second target ciphertext blocks, to the second target
The index value to obtain the second target ciphertext blocks is decrypted in ciphertext blocks；
Whether the index value for S515. judging to treat the first index value for decrypting output video data again and the second target ciphertext blocks meets
Preset condition, to determine that first decrypts whether output video data and index value are valid data again；
If S516. first again decryption output video data and index value be valid data, output first again decryption output decryption
Data, subsequently into step S52.
In the step S52, specifically comprise the following steps：
S521. the close output video data of first heavy-duty machine is inputted into the nonlinear displacement register identical with the first re-encryption
In, then nonlinear shift register is inversely shifted, obtains the close output video data of the first heavy-duty machine after upstream shift；
S522. by the spilling unit of the close output video data of the first heavy-duty machine after upstream shift and the nonlinear shift register
Element carry out the inverse operation of the regular operation, and operation result is input to compensating unit, after being compensated.
S523. it by the data in the nonlinear shift register unit, is obtained according to the inverse transformation of the inverible transform
To initial data.
Although it as described above, is illustrated according to the embodiment and attached drawing that embodiment is limited, to the art
It can carry out various modifications and deform from above-mentioned record for technical staff with general knowledge.For example, according to explanation
Technology illustrated in the mutually different sequence of method carry out and/or according to system, structure, device, circuit with explanation etc.
The mutually different form of method illustrated by inscape is combined or combines or carried out according to other inscapes or equipollent
It replaces or displacement also may achieve appropriate effect.For those of ordinary skill in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, several equivalent substitute or obvious modifications are made, and performance or use is identical, should be all considered as
It belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of computer video data processing method, this method specifically comprise the following steps：
S1. original video information is obtained；
S2. compressed encoding is carried out to original video information, obtains the video data of high compression rate；
S3. two re-encryptions are carried out to video data；
S4. the double encrypted video data is transmitted；
S5. encrypted video data is received, and is decrypted, the video data after being decrypted；
S6. the video data after decryption is decoded, obtains original video information.
2. the method as described in claim 1, which is characterized in that in the step S2, specifically comprise the following steps：
S21. sample format is selected, selects coding mode corresponding with the sample format；
S22. coding is carried out to the encoding block of video data using the sample format of selection and the coding mode of selection and generates high pressure
The video data of shrinkage, wherein, the video data of the high compression rate includes：Sample format and/or coding mode, with sampling lattice
Formula and/or the corresponding syntactic element of coding mode.
3. method as claimed in claim 1 or 2, which is characterized in that the original video information is included by R component, G components, B
The video of component composition and the encoding block of data.
4. method as claimed in claim 3, which is characterized in that the encoding block is the coding region of image, wherein, the volume
Code region includes at least one of：Subgraph, macro block, maximum coding unit LCU, coding tree unit CTU, the coding of image are single
Subregion, predicting unit PU, the converter unit TU of first CU, CU.
5. method as claimed in claim 3, which is characterized in that the sample format is 4:4:4 sample formats and 4:2:0 sampling
Form；Alternatively, the multiple format is 4:4:4 sample formats and 4:2:2 sample formats；Alternatively, the sample format is 4:2:2
Sample format and 4:2:0 sample format.
6. the method as described in claim 2-5 is any, which is characterized in that the coding mode includes at least one of：Root
Intra prediction is carried out according to the neighborhood pixels of the encoding block；Inter-prediction is carried out according to the adjacent image of the coded image；Root
Inter-frame Transformation is carried out according to the adjacent image of the coded image；Quantization；General string prediction；Palette encodes.
7. the method as described in claim 1, which is characterized in that the step S3 specifically comprises the following steps：
S31. terminal treats enciphered video data and carries out the first re-encryption, obtains the first re-encryption output video data；
S32. Hash operation is carried out to the first re-encryption output video data, obtains the rope of the first re-encryption output video data
Draw key；
S33. the second re-encryption is carried out to the first encryption output video data, obtains the second encryption output video data.
8. the method for claim 7, which is characterized in that in the step S31, specifically comprise the following steps：
S311. video data to be encrypted is converted into array by inverible transform, the array element number with it is described to be encrypted
The data bits of video data is identical, and each element of the array is the binary number of identical digit；
S312., each element of the array is input to each unit of nonlinear shift register；
S313. the array is grouped Encryption Algorithm operation；
S314. the operation result of the block encryption algorithm is subjected to compressed transform by compression function, obtained and the array
The identical compression of each element digit, obtains compressed output video data；
S315. the array element of the spilling unit of the compressed output video data and the nonlinear shift register is into professional etiquette
Then operation, and operation result is input to compensating unit；
S316. the compressed output video data of the compensating unit being input to are obtained according to the inverse transformation of the inverible transform
First re-encryption exports video data.
9. method as claimed in claim 8, which is characterized in that in the step S32, specifically comprise the following steps：
S321. using the last one ciphertext blocks in generated first re-encryption output video data as first object ciphertext
Mark ciphertext blocks are decrypted the index value to obtain mark ciphertext blocks in block；
S322. default operation is carried out to the index value of first object ciphertext blocks and obtains the index of the first re-encryption output video data
Value carries out the index value of the first re-encryption output video data the second re-encryption operation, generation the first re-encryption output video
The index ciphertext of data；
S323. the first re-encryption output video data and index ciphertext are merged, generation the second re-encryption output video data.
10. method as claimed in claim 9, which is characterized in that include step following steps in the step S5：
S51. it carries out first to the second re-encryption output video data to decrypt again, obtains first and decrypt output video data again；
S52. it decrypts output video data progress second again to first to decrypt again, obtains initial data；
In the step S51, specifically comprise the following steps：
S511. operation is decrypted to the second re-encryption output video data using the preset security key, obtains first
The data of decryption output video data and index ciphertext again；
S512. the data for decrypting output video data again to first carry out Hash operation, obtain the first decryption output video data
Index key；
S513. the index that the index key pair first for decrypting output video data again using first decrypts output video data again is close
Operation is decrypted in text, obtains the first index value for decrypting output video data again；
S514. first is decrypted again the previous ciphertext blocks of output video data as the second target ciphertext blocks, to the second target
The index value to obtain the second target ciphertext blocks is decrypted in ciphertext blocks；
Whether the index value for S515. judging to treat the first index value for decrypting output video data again and the second target ciphertext blocks meets
Preset condition, to determine that first decrypts whether output video data and index value are valid data again；
If S516. first again decryption output video data and index value be valid data, output first again decryption output decryption
Data, subsequently into step S52；
In the step S52, specifically comprise the following steps：
S521. the close output video data of first heavy-duty machine is inputted into the nonlinear displacement register identical with the first re-encryption
In, then nonlinear shift register is inversely shifted, obtains the close output video data of the first heavy-duty machine after upstream shift；
S522. by the spilling unit of the close output video data of the first heavy-duty machine after upstream shift and the nonlinear shift register
Element carry out the inverse operation of the regular operation, and operation result is input to compensating unit, after being compensated；
S523. by the data in the nonlinear shift register unit, original is obtained according to the inverse transformation of the inverible transform
Beginning data.
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| CN201810084453.5A CN108235022A (en) | 2018-01-29 | 2018-01-29 | A kind of computer video data processing method |
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| CN201810084453.5A CN108235022A (en) | 2018-01-29 | 2018-01-29 | A kind of computer video data processing method |
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