CN110149521B - Data processing method and system - Google Patents
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- CN110149521B CN110149521B CN201910279484.0A CN201910279484A CN110149521B CN 110149521 B CN110149521 B CN 110149521B CN 201910279484 A CN201910279484 A CN 201910279484A CN 110149521 B CN110149521 B CN 110149521B
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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
- H04N19/46—Embedding additional information in the video signal during the compression process
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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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Abstract
The present disclosure provides a data processing method and system, which relates to the technical field of electronic information and can solve the problem of large resource consumption in the data encryption and decryption processes. The specific technical scheme is as follows: the data processing method is applied to a data encryption device, and at least one I frame in an image frame sequence is searched by acquiring the image frame sequence; and encrypting the at least one I frame according to a preset encryption algorithm, and generating an encrypted image frame sequence according to the encrypted at least one target frame image and other unencrypted frame images in the image frame sequence. According to the method and the device, when the image frame sequence is encrypted, the selective encryption is carried out according to the content of the frame image, so that the consumption of data processing resources of data encryption equipment is reduced, especially when the image frame sequence is transmitted in real time, the reduction of the encrypted data volume can effectively reduce transmission delay, and the display effect of real-time transmission is improved. The present disclosure is used for data encryption and decryption.
Description
Technical Field
The present disclosure relates to the field of electronic information technologies, and in particular, to a data processing method and system.
Background
In order to ensure the safety of data, an encryption mode is adopted for transmission in the data processing process.
In the prior art, a data encryption transmission scheme is as follows: after encrypting each piece of source data, the data processing system sends the encrypted source data to the receiving end of the data decryption device through the sending end of the data encryption device, and the data decryption device decrypts the encrypted source data. In this process, since the data encryption device needs to encrypt each piece of data, and correspondingly, the data decryption device needs to decrypt each piece of encrypted data, the resources of data processing of the data encryption device and the data decryption device are very consumed. Especially for the application of transmitting real-time pictures, the resource consumption of encrypting or decrypting at two ends is further increased, and the time delay of image transmission is increased.
Disclosure of Invention
The embodiment of the disclosure provides a data processing method and system, which can solve the problem of resource consumption caused by encrypted data transmission. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, there is provided a data processing method applied to a data encryption apparatus, the method including:
acquiring an image frame sequence, and finding at least one I frame in the image frame sequence;
encrypting at least one I frame according to a preset encryption algorithm;
an encrypted image frame sequence is generated from the encrypted at least one I frame and other image frames of the image frame sequence that are not encrypted.
In one embodiment, the method for encrypting at least one I frame according to a preset encryption algorithm includes:
identifying at least one macro block in the target frame image, and determining the type corresponding to the at least one macro block in the I frame according to the identification result, wherein the type comprises the following steps: a text type or an image type;
and encrypting at least one I frame according to the type corresponding to at least one macro block in the I frame.
In one embodiment, the method for encrypting at least one I frame according to a preset encryption algorithm includes:
when the type corresponding to at least one macro block in the frame is an image type, acquiring a target pixel value corresponding to at least one image type macro block;
determining at least one image type macro block to be an effective macro block or an invalid macro block according to a comparison result of a target pixel value corresponding to the at least one image type macro block and a preset pixel value;
and encrypting the at least one I frame by encrypting the at least one valid macro block and the macro block corresponding to the character type and not encrypting the at least one invalid macro block.
In one embodiment, the method for encrypting at least one I frame according to a preset encryption algorithm includes:
at least one I frame is encrypted by a macro block corresponding to the encrypted character type and a macro block corresponding to the unencrypted image type.
In one embodiment, the method of generating an encrypted sequence of image frames comprises:
generating encryption information corresponding to at least one image frame in the image frame sequence according to an encryption algorithm and an encryption state corresponding to at least one image frame in the image frame sequence;
after at least one image frame in the image frame sequence is marked according to the encryption information, an encrypted image frame sequence is generated.
The data processing method provided by the embodiment of the disclosure is applied to a data encryption device, and at least one I frame in an image frame sequence is found by acquiring the image frame sequence; and encrypting at least one I frame according to a preset encryption algorithm, and generating an encrypted image frame sequence according to at least one encrypted target frame image and other unencrypted frame images in the image frame sequence. According to the method and the device, when the image frame sequence is encrypted, the selective encryption is carried out according to the content of the frame image, so that the consumption of data processing resources of data encryption equipment is reduced, especially when the image frame sequence is transmitted in real time, the reduction of the encrypted data volume can effectively reduce transmission delay, and the display effect of real-time transmission is improved.
According to a second aspect of the embodiments of the present disclosure, there is provided a data processing method applied to a data decryption apparatus, the method including:
acquiring an image frame sequence, and finding at least one I frame in the image frame sequence;
decrypting at least one I frame according to a preset decryption algorithm;
and generating a decrypted image frame sequence based on the decrypted at least one I frame and other frame images in the image frame sequence which are not decrypted.
In one embodiment, the method for decrypting at least one I-frame image according to a preset decryption algorithm includes:
acquiring code stream structure information corresponding to at least one I frame, wherein the code stream structure information comprises parameter information and encryption information corresponding to at least one macro block in the I frame;
and determining a decryption sequence corresponding to at least one macro block in the I frame according to the code stream structure information.
In one embodiment, the method for decrypting at least one I frame according to a preset decryption algorithm further includes:
determining at least one encrypted macro block in at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the at least one I frame is encrypted or not;
the at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I-frame that are not encrypted.
The data processing method provided by the embodiment of the disclosure is applied to a data decryption device, and at least one I frame in an image frame sequence is found by acquiring the image frame sequence; and decrypting at least one I frame according to a preset decryption algorithm, and generating a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted frame images in the image frame sequence. According to the method and the device, when the image frame sequence is decrypted, the image frame sequence is selectively decrypted according to the content of the image frame, so that the consumption of data processing resources in the data decryption process is reduced, especially when the image frame sequence is transmitted in real time, the decryption data volume is reduced, the transmission delay can be effectively reduced, and the display effect of real-time transmission is improved.
According to a third aspect of embodiments of the present disclosure, there is provided a data processing system, the system comprising: data encryption means and data decryption means; the data encryption device is connected with the data decryption device;
the data encryption device is used for acquiring an image frame sequence and searching at least one I frame in the image frame sequence;
encrypting the at least one I frame according to a preset encryption algorithm;
generating an encrypted image frame sequence according to the encrypted at least one I frame and other image frames in the image frame sequence which are not encrypted, and sending the encrypted image frame sequence to the data decryption device;
the data decryption device is used for acquiring the encrypted image frame sequence and finding out at least one I frame in the target video;
decrypting the at least one I frame according to a preset decryption algorithm;
and generating a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted image frames in the target video.
In one embodiment, the data encryption apparatus in the system is further configured to,
identifying at least one macro block in the target frame image, and determining the type corresponding to the at least one macro block in the I frame according to the identification result, wherein the type comprises the following steps: a text type or an image type;
and encrypting at least one I frame according to the type corresponding to at least one macro block in the I frame.
In one embodiment, the data decryption means in the system is further adapted to,
determining at least one encrypted macro block in the at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the at least one I frame is encrypted or not;
decrypting the at least one I-frame by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I-frame that are not encrypted.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flowchart of a data processing method provided by an embodiment of the present disclosure;
fig. 2 is a flowchart 1 of a data processing method provided by an embodiment of the present disclosure;
FIG. 3 is a block diagram of a data processing system according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The embodiment of the present disclosure provides a data processing method, which is used for a data encryption device, and as shown in fig. 1, the data processing method includes the following steps:
101. the method comprises the steps of obtaining an image frame sequence and finding at least one I frame in the image frame sequence.
In an alternative embodiment, the sequence of image frames may be generated from the target video data.
The sequence of image frames is classified according to the highly compressed digital video codec standard h.264/AVC (Advanced video Coding) as: carrying out coding and decoding processing on I frame image data, P frame image data and B frame image data; the I frame refers to a complete coding frame image, namely a reference frame for coding processing; the P frame refers to a frame image generated with reference to the previous I frame and containing only the difference portion code; the B frame refers to a frame image encoded with reference to frames before and after.
Therefore, when the image frame sequence is encrypted, at least one I frame in the image frame sequence is screened out firstly, so that the quality of data processing can be ensured, and the safety of data can be ensured.
102. And encrypting the at least one I frame according to a preset encryption algorithm.
In an alternative embodiment, encrypting the at least one I frame according to a preset encryption algorithm includes:
identifying at least one macro block in the target frame image, and determining that the corresponding at least one macro block in the I frame is a character type macro block or an image type macro block according to the identification result;
and encrypting at least one I frame according to the type corresponding to at least one macro block in the I frame.
In the specific encryption processing, at least one I frame is encrypted according to the type corresponding to at least one macro block in the I frame, and the encryption comprises the step of encrypting the macro block corresponding to at least one image type or the macro block corresponding to at least one character type in the I frame according to a preset encryption algorithm. Two specific examples are set forth below for illustration:
in a first example, encrypting at least one I frame by encrypting all macroblocks corresponding to a text type and a portion of macroblocks corresponding to an encrypted image type, wherein encrypting valid macroblocks corresponding to an image type comprises:
when the type corresponding to at least one macro block in the frame is an image type, acquiring a target pixel value corresponding to at least one image macro block;
determining at least one image macro block to be an effective macro block or an invalid macro block according to a comparison result of a target pixel value corresponding to the at least one image macro block and a preset pixel value;
encrypting the at least one I-frame by encrypting the at least one valid macroblock, the macroblock corresponding to the literal type, and not encrypting the at least one invalid macroblock.
A specific example is set forth here to illustrate how a macroblock is divided into active image macroblocks or inactive image macroblocks: the method comprises the following steps:
firstly, determining a preset pixel value, and selecting the pixel value of a target pixel point as the preset pixel value in a current macro block; the target pixel point can be a pixel point at any position in the current macro block or a pixel point at a specified position.
Secondly, calculating a difference value between a target pixel value corresponding to at least one image type macro block and a preset pixel value;
and finally, when the difference value between the target pixel value corresponding to the image type macro block and the preset pixel value is within the preset value, determining the image macro block as an invalid macro block, otherwise, considering the current image block as an effective image block. For example, the color value corresponding to the preset pixel value is 200, and if the difference value between the pixel values corresponding to the other macroblocks and 200 is within the range of 0-3, the difference value between the target pixel value corresponding to the image macroblock and the preset pixel value is within the preset value, and the image macroblock can be regarded as a pure color block without encryption processing.
In this example, since, in the image data processing process, for a macroblock of a pure color, that is, all pixel values are the same color value, it can be considered that there is no image block containing valid content; on the basis, the judgment condition is expanded, for example, when the difference values of the color values of all pixels in a macro block are within a preset value, for example, the 8-bit color depth has 256 color values, and the difference values cannot be identified by naked eyes when the difference values are 1-2, the judgment condition can also be judged to be a pure color block. The method comprises the steps of directly encrypting an effective image block, and directly transmitting an invalid image block without encryption; resources for encryption processing can be saved.
In a second example, at least one I frame is encrypted by encrypting only all macroblocks corresponding to a text type and not encrypting macroblocks corresponding to an image type. The method comprises the following specific steps:
firstly, acquiring an I frame, and dividing the I frame into M multiplied by N macro blocks, wherein M is not less than 1, and N is not less than 1;
secondly, identifying each macro block, and dividing each macro block into a character type macro block or an image type macro block according to an identification result;
and finally, only encrypting the character type macro block and not encrypting the image type macro block.
In the step, all macro blocks corresponding to the character types are directly encrypted to obtain type macro blocks corresponding to the encrypted characters; the macro block corresponding to the image type is directly transmitted without being encrypted.
In this example, after each macro block is classified into an image type or a text type, only the macro blocks corresponding to all the text types are encrypted, and the macro blocks corresponding to the image type are directly transmitted without being encrypted. The scheme is relatively suitable for office occasions and is characterized in that: the transmitted image has more character information and more important key information is involved, and the image information does not need an encrypted scene.
In an alternative embodiment, the present disclosure encrypts the at least one I-frame according to a predetermined encryption algorithm, wherein the predetermined encryption algorithm includes a plurality of encryption algorithms.
The first alternative is as follows: the preset encryption algorithm may include a symmetric encryption algorithm and an asymmetric encryption algorithm.
Alternative two: the preset encryption algorithm can be selected by presetting an encryption algorithm pool and determining the preset encryption algorithm through the encryption algorithm pool; the encryption algorithm pool comprises a preset number of encryption algorithms, and the encryption algorithms are sequentially selected in sequence when the macro block to be encrypted is encrypted, or one encryption algorithm is randomly selected from the encryption algorithm pool for encrypting the current macro block during each encryption.
Further, specific examples are listed to illustrate how the predetermined encryption algorithm is determined by the pool of encryption algorithms. Including selecting the encryption algorithm in a preset order or in a random order.
An example one, selecting a preset encryption algorithm according to a preset sequence includes: the encryption algorithm pool comprises 8 encryption algorithms, a preset sequence is set for the 8 encryption algorithms, for example, numbering is carried out according to 1-8, the encryption algorithms in the encryption algorithm pool are polled in sequence during each encryption, the encryption algorithm used at present is determined, the current macro block to be encrypted is encrypted, the next encryption algorithm is selected during the next encryption, if the last encryption algorithm is 3, the current encryption algorithm is 4, the next encryption algorithm is 5, and the like, and when the last encryption algorithm, namely, the 8 th encryption algorithm is adopted for encryption and then encryption is carried out again, the encryption algorithms are selected from the first encryption algorithm in sequence.
Example two, the preset encryption algorithm is selected according to a random order, namely: the preset encryption algorithm can also be selected to randomly select an encryption algorithm from the encryption algorithm pool when the macro block to be encrypted is encrypted each time, so as to encrypt the current macro block to be encrypted. Presetting a random number generator with a value range from 1 to 8, randomly generating a number by the random number generator during each encryption, and determining an encryption algorithm corresponding to the number as the encryption algorithm used at the time, for example, when the generated number is 7, selecting the 7 th encryption algorithm.
According to the method and the device, when at least one macro block in the I frame is encrypted, a plurality of encryption algorithms are adopted for encryption, so that the difficulty of data decryption is greatly improved, and the security of data encryption is improved.
103. An encrypted image frame sequence is generated from the encrypted at least one I frame and other image frames of the image frame sequence that are not encrypted.
In an alternative embodiment, generating a sequence of encrypted image frames comprises:
generating encryption information corresponding to at least one image frame in the image frame sequence according to an encryption algorithm and an encryption state corresponding to at least one image frame in the image frame sequence;
after at least one image frame in the image frame sequence is marked according to the encryption information, an encrypted image frame sequence is generated.
Specifically, in the process of encrypting the image frame, header information corresponding to at least one macroblock in the image frame is obtained, the header information is used for indicating encryption information of the macroblock, and the header information includes two data bits, one of the data bits is used for indicating an encryption state, that is, whether the current macroblock is encrypted, and the other data bit is used for indicating an encryption algorithm, that is, encryption algorithm information of the current macroblock.
Specific examples are listed here to illustrate: generating two data bits in the header information of the macroblock, where a length corresponding to a data bit in the header information of the macroblock for indicating the encryption status of the current macroblock may be 1bit (bit), that is, indicating whether the macroblock is encrypted by 0 or 1, for example, setting a bit value of the data bit to 0 when the macroblock is encrypted, and setting a bit value of the data bit to 1 when the macroblock is encrypted. The length corresponding to the data bits in the header information of the macroblock for indicating the encryption algorithm of the current macroblock depends on the kind of encryption algorithms in the pool of encryption algorithms, for example, when the number of encryption algorithms is 8, the data bits may be set to at least 3 bits.
In an alternative embodiment, the present disclosure transmits to a receiving device of a sequence of image frames after generating the sequence of encrypted image frames.
The data processing method provided by the embodiment of the disclosure is applied to a data encryption device, and at least one I frame in an image frame sequence is found by acquiring the image frame sequence; and encrypting at least one I frame according to a preset encryption algorithm, and generating an encrypted image frame sequence according to at least one encrypted target frame image and other unencrypted frame images in the image frame sequence. According to the method and the device, when the image frame sequence is encrypted, the selective encryption is carried out according to the content of the frame image, so that the consumption of data processing resources of data encryption equipment is reduced, especially when the image frame sequence is transmitted in real time, the reduction of the encrypted data volume can effectively reduce transmission delay, and the display effect of real-time transmission is improved.
Example two
Based on the data processing method provided by the embodiment corresponding to fig. 1, another embodiment of the present disclosure provides a data processing method, which may be applied to a data decryption device, for example, the data decryption device may be a terminal device or a network server, and the present disclosure is not limited thereto. Referring to fig. 2, the data processing method provided in this embodiment includes the following steps:
201. the method comprises the steps of obtaining an image frame sequence and finding at least one I frame in the image frame sequence.
In an alternative embodiment, decrypting the at least one I-frame image according to a preset decryption algorithm includes:
acquiring code stream structure information corresponding to at least one I frame, wherein the code stream structure information comprises parameter information and encryption information corresponding to at least one macro block in the I frame;
and determining a decryption sequence corresponding to at least one macro block in the I frame according to the code stream structure information.
Further, the code stream structure information corresponding to the I frame is that when the present disclosure obtains the image frame sequence, the present disclosure obtains the data packet header information of at least one macro block by reading the code stream data corresponding to the encoded image frame sequence, where the packet header information is used to identify the type and length of the corresponding macro block, and is also used to identify whether the current macro block is encrypted and the corresponding encryption algorithm. And generating code stream structure information of the I frame according to the packet headers corresponding to all the macro blocks in the I frame.
Therefore, the code stream structure information corresponding to at least one I frame comprises parameter information and encryption information corresponding to at least one macro block in the I frame;
the parameter information comprises the type of the macro block, the setting of the macro block and the corresponding frame;
the encryption information includes whether the macro block is encrypted and the corresponding encryption algorithm
In the specific embodiment, according to the code stream structure information, the sequence of each macro block in the current I frame is confirmed, and the macro blocks are combined into a complete frame picture according to the sequence, including
During transmission, a frame image in an image frame sequence is encoded into at least one macroblock, for example, an I frame includes four macroblocks, which are in turn: the macro blocks A, B, C and D correspond to a preset sequence as follows: the macro blocks A, B, C and D are sequentially transmitted according to a preset sequence; however, due to the influence of network resources, the order of the macroblocks in the frame image acquired by the data decryption device may be disturbed, for example, the macroblocks a, B, D, and C; if the decoded and decrypted image is decoded according to the wrong macro block sequence, the image may have larger deviation with the source image, and the display effect is influenced.
Therefore, when the image frame sequence is obtained, the processing sequence of at least one macro block in the received frame image is adjusted according to the preset sequence, and then decryption and decoding are performed, so that the quality and the efficiency of decryption are further improved.
202. And decrypting the at least one I frame image according to a preset decryption algorithm.
In an alternative embodiment, decrypting the at least one I frame image data is performed, the method further comprising:
determining at least one encrypted macro block in at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the I frame is encrypted or not;
the at least one I frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I frame that are not encrypted.
In a specific embodiment, the encrypted macro block in the I frame can be found according to the encryption identification information in the code stream structure information corresponding to the I frame.
Further, when decrypting the encrypted macroblock, the encryption information of the encrypted macroblock can be further parsed,
if the encryption information comprises the encryption algorithm corresponding to the encryption macro block, selecting a corresponding decryption algorithm to decrypt the current macro block according to the encryption algorithm corresponding to the macro block;
if the encrypted information does not include the encryption algorithm corresponding to the encrypted macroblock, a default decryption algorithm may be used for decryption.
According to the method and the device, the encrypted at least one macro block in the I frame is determined through the encryption information corresponding to the at least one I frame, and only the encrypted macro block is decrypted, so that the data size for decryption is reduced, and the technical effect of improving the data decryption efficiency is achieved.
203. A decrypted image frame sequence is generated based on the decrypted at least one I frame and other image frames of the image frame sequence that are not decrypted.
In the encryption algorithm, only the I frame is encrypted, so that only the I frame is decrypted during decryption, and the decryption efficiency is improved.
The data processing method provided by the embodiment of the disclosure is applied to a data decryption device, and at least one I frame in an image frame sequence is found by acquiring the image frame sequence; and decrypting at least one I frame according to a preset decryption algorithm, and generating a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted frame images in the image frame sequence. According to the method and the device, when the image frame sequence is decrypted, the image frame sequence is selectively decrypted according to the content of the image frame, so that the consumption of data processing resources in the data decryption process is reduced, especially when the image frame sequence is transmitted in real time, the decryption data volume is reduced, the transmission delay can be effectively reduced, and the display effect of real-time transmission is improved.
EXAMPLE III
Based on the data processing method described in the embodiments corresponding to fig. 1 and fig. 2, the following is an embodiment of the system of the present disclosure, which can be used to execute an embodiment of the method of the present disclosure.
The embodiment of the present disclosure provides a data processing system, as shown in fig. 3, the data processing apparatus 30 includes: a data encryption device 301 and a data decryption device 302;
the data encryption device is connected with the data decryption device;
the data encryption device is used for acquiring the image frame sequence and searching at least one I frame in the image frame sequence;
encrypting at least one I frame according to a preset encryption algorithm;
generating an encrypted image frame sequence according to the encrypted at least one I frame and other image frames in the image frame sequence which are not encrypted, and sending the encrypted image frame sequence to a data decryption device;
the data decryption device is used for acquiring the encrypted image frame sequence and searching at least one I frame in the target video;
decrypting at least one I frame according to a preset decryption algorithm;
and generating a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted image frames in the target video.
In an alternative embodiment, the data encryption device 301 is further configured to,
identifying at least one macro block in the target frame image, and determining the type corresponding to the at least one macro block in the I frame according to the identification result, wherein the type comprises the following steps: a text or an image;
and encrypting at least one I frame according to the type corresponding to at least one macro block in the I frame.
In an optional embodiment, the data encryption apparatus 301 further includes: a receiver, a processor and a transmitter,
the receiver, is used for receiving the image frame sequence;
the processor is used for encrypting at least one I frame according to a preset encryption algorithm;
generating an encrypted image frame sequence from the encrypted at least one I frame and other image frames of the image frame sequence that are not encrypted;
the transmitter is configured to transmit the sequence of encrypted image frames to the data decryption device.
In an alternative embodiment, the data decryption means 302 is also adapted to,
determining at least one encrypted macro block in at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the at least one I frame is encrypted or not;
the at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I-frame that are not encrypted.
In an alternative embodiment, the data decryption apparatus 302 further includes: a receiver, a processor and a transmitter,
the receiver for receiving an encrypted sequence of image frames;
the processor is used for decrypting at least one I frame according to a preset encryption algorithm;
generating a decrypted image frame sequence from the decrypted at least one I frame and other image frames of the image frame sequence that are not decrypted;
the transmitter is configured to transmit the decrypted image frame sequence to a data display device.
The data processing system provided by the embodiment of the disclosure comprises a data encryption device and a data decryption device, and the system obtains an image frame sequence and finds at least one I frame in the image frame sequence in the process of processing data; encrypting and decrypting at least one I frame according to a preset encryption and decryption algorithm, and generating an encrypted image frame sequence according to the encrypted at least one I frame and other unencrypted frame images in the image frame sequence; or generating an encrypted image frame sequence according to the encrypted at least one I frame and other frame images which are not encrypted in the image frame sequence; the method selectively encrypts and decrypts the image frame sequence according to the content of the frame image when encrypting and decrypting the image frame sequence, thereby reducing the consumption of data processing resources of a data processing system, and particularly reducing the amount of encrypted data when transmitting the image frame sequence in real time, effectively reducing transmission delay and improving the display effect of real-time transmission.
Based on the data processing method described in the embodiment corresponding to fig. 1 and fig. 2, an embodiment of the present disclosure further provides a computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be a Read Only Memory (ROM), a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. The storage medium stores computer instructions for executing the data processing method described in the embodiment corresponding to fig. 1 and fig. 2, which is not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (9)
1. A data processing method applied to a data encryption apparatus, the method comprising:
acquiring an image frame sequence, and finding at least one I frame in the image frame sequence;
encrypting the at least one I frame according to a preset encryption algorithm;
generating a sequence of encrypted image frames from the encrypted at least one I frame and other image frames of the sequence of image frames that are not encrypted;
wherein encrypting the at least one I-frame comprises at least:
identifying at least one macro block in a target frame image, acquiring an identification result, and determining a type corresponding to the at least one macro block in the I frame according to the identification result, wherein the type comprises: a text type or an image type;
and according to the type corresponding to at least one macro block in the I frame, carrying out non-encryption processing on an invalid macro block in the I frame, wherein the invalid macro block is determined according to a comparison result of a target pixel value corresponding to the macro block and a preset pixel value.
2. The method according to claim 1, wherein said encrypting said at least one I-frame according to a predetermined encryption algorithm comprises:
when the type corresponding to at least one macro block in the frame is an image type, acquiring a target pixel value corresponding to the at least one image type macro block;
determining that the at least one image type macro block is an effective macro block or an invalid macro block according to a comparison result of a target pixel value corresponding to the at least one image type macro block and a preset pixel value;
and encrypting the at least one I frame by encrypting the at least one effective macro block and the macro block corresponding to the character type and not encrypting the at least one invalid macro block.
3. The method according to claim 1, wherein said encrypting said at least one I-frame according to a predetermined encryption algorithm comprises:
and encrypting the at least one I frame by encrypting the macro block corresponding to the character type and not encrypting the macro block corresponding to the image type.
4. The method of claim 1, wherein the generating the sequence of encrypted image frames comprises:
generating encryption information corresponding to at least one image frame in the image frame sequence according to an encryption algorithm and an encryption state corresponding to at least one image frame in the image frame sequence;
and marking at least one image frame in the image frame sequence according to the encryption information to generate the encrypted image frame sequence.
5. A data processing method applied to a data decryption apparatus, the method comprising:
decrypting at least one I frame according to a preset decryption algorithm;
and generating a decrypted image frame sequence based on the decrypted at least one I frame and other frame images in the image frame sequence which are not decrypted.
6. The method according to claim 5, wherein before decrypting said at least one I-frame image according to a predetermined decryption algorithm, further comprising:
acquiring code stream structure information corresponding to the at least one I frame, wherein the code stream structure information comprises parameter information and encryption information corresponding to at least one macro block in the I frame;
and determining a decryption sequence corresponding to at least one macro block in the I frame according to the code stream structure information.
7. The method of claim 6, wherein the decrypting the at least one I-frame according to a preset decryption algorithm, the method further comprising:
determining at least one encrypted macro block in the at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the at least one I frame is encrypted or not;
decrypting the at least one I-frame by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I-frame that are not encrypted.
8. A data processing system, comprising: data encryption means and data decryption means;
the data encryption device is connected with the data decryption device;
the data encryption device is used for acquiring an image frame sequence and finding at least one I frame in the image frame sequence, and the image frame sequence is generated at least according to a target video;
generating an encrypted image frame sequence according to the encrypted at least one I frame and other image frames in the image frame sequence which are not encrypted, and sending the encrypted image frame sequence to the data decryption device;
wherein encrypting the at least one I-frame comprises at least:
identifying at least one macro block in a target frame image, acquiring an identification result, and determining a type corresponding to the at least one macro block in the I frame according to the identification result, wherein the type comprises: a text type or an image type;
according to the type corresponding to at least one macro block in the I frame, carrying out non-encryption processing on an invalid macro block in the I frame, wherein the invalid macro block is determined according to a comparison result of a target pixel value corresponding to the macro block and a preset pixel value;
the data decryption device is used for acquiring the encrypted image frame sequence and finding out at least one I frame in the target video;
and generating a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted image frames in the target video.
9. The system of claim 8, wherein the data decryption device is further configured to,
determining at least one encrypted macro block in the at least one I frame according to encryption information corresponding to the at least one I frame, wherein the encryption information is used for indicating whether the at least one macro block in the at least one I frame is encrypted or not;
decrypting the at least one I-frame by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks of the at least one I-frame that are not encrypted.
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| CN111800634A (en) * | 2020-06-30 | 2020-10-20 | 西安万像电子科技有限公司 | Image processing method and device |
| CN115278311A (en) * | 2022-07-26 | 2022-11-01 | 中国工商银行股份有限公司 | Video encryption method and device based on macro block |
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