CN114640855A - Data processing method and system - Google Patents

Abstract

The invention provides a data processing method and a data processing system, relates to the technical field of electronic information, and can solve the problem of high 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

Data processing method and system

This application is a divisional application of a Chinese patent with the application date of April 9, 2019, and the application number is 2019102794840 and the application name is "Data Transmission Method and System".

technical field

The present disclosure relates to the field of electronic information technology, and in particular, to a data processing method and system.

Background technique

In order to ensure the security of data, encryption is used for transmission during data processing.

In the prior art, the data encryption transmission scheme is as follows: after the data processing system encrypts each piece of source data, it is sent to the receiving end of the data decryption device through the sending end of the data encryption device, and the data decryption device performs encryption on the encrypted source data. decrypt. In this process, because the data encryption device needs to encrypt each piece of data, and correspondingly, the data decryption device also needs to decrypt each encrypted data, therefore, the data encryption device and the data decryption device The resource consumption of processing is very high. Especially for applications that transmit real-time images, it will further increase the resource consumption of encryption or decryption at both ends and increase the delay of image transmission.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a data processing method and system, which can solve the problem of resource consumption caused by transmitting encrypted data. The technical solution is as follows:

According to a first aspect of the embodiments of the present disclosure, a data processing method is provided, which is applied to a data encryption device, and the method includes:

Obtain a sequence of image frames, and find at least one I frame in the sequence of image frames;

Encrypt at least one I frame according to a preset encryption algorithm;

An encrypted sequence of image frames is generated from the encrypted at least one I-frame and other unencrypted image frames in the sequence of image frames.

In one embodiment, the method encrypts at least one I frame according to a preset encryption algorithm, including:

Identify at least one macroblock in the target frame image, and determine the type corresponding to at least one macroblock in the I frame according to the identification result, and the type includes: text type or image type;

At least one I frame is encrypted according to the type corresponding to at least one macroblock in the I frame.

In one embodiment, the method encrypts at least one I frame according to a preset encryption algorithm, including:

When the type corresponding to at least one macroblock in the frame is an image type, obtain the target pixel value corresponding to the at least one image type macroblock;

According to the comparison result between the target pixel value corresponding to the at least one image type macroblock and the preset pixel value, it is determined that the at least one image type macroblock is a valid macroblock or an invalid macroblock;

At least one I-frame is encrypted by encrypting at least one valid macroblock and a macroblock corresponding to a literal type, and not encrypting at least one invalid macroblock.

In one embodiment, the method encrypts at least one I frame according to a preset encryption algorithm, including:

At least one I-frame is encrypted by encrypting the macroblock corresponding to the text type and the macroblock corresponding to the unencrypted image type.

In one embodiment, generating a sequence of encrypted image frames in the method includes:

generating encryption information corresponding to at least one image frame in the image frame sequence according to the encryption algorithm and encryption state corresponding to at least one image frame in the image frame sequence;

After marking at least one image frame in the image frame sequence according to the encryption information, an encrypted image frame sequence is generated.

The data processing method provided by the embodiment of the present disclosure is applied to a data encryption device, by 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, and An encrypted image frame sequence is generated according to the encrypted at least one target frame image and other unencrypted frame images in the image frame sequence. When encrypting the image frame sequence, the present disclosure selectively encrypts according to the content of the frame image, thereby reducing the data processing resource consumption of the data encryption device, especially when the image frame sequence is transmitted in real time, the amount of encrypted data is reduced , which can effectively reduce the transmission delay and improve the display effect of real-time transmission.

According to a second aspect of the embodiments of the present disclosure, there is provided a data processing method, which is applied to a data decryption device, and the method includes:

Obtain a sequence of image frames, and find at least one I frame in the sequence of image frames;

Decrypt at least one I frame according to a preset decryption algorithm;

A sequence of decrypted image frames is generated from the decrypted at least one I-frame and other undecrypted frame images in the sequence of image frames.

In one embodiment, the method decrypts at least one I-frame image according to a preset decryption algorithm, including:

Acquire code stream structure information corresponding to at least one I frame, where the code stream structure information includes parameter information and encryption information corresponding to at least one macroblock in the I frame;

According to the code stream structure information, the decryption sequence corresponding to at least one macroblock in the I frame is determined.

In one embodiment, the method decrypts at least one I frame according to a preset decryption algorithm, further comprising:

Determine at least one encrypted macroblock in the at least one I frame according to encryption information corresponding to the at least one I frame, where the encryption information is used to indicate whether the at least one macroblock in the at least one I frame is encrypted;

The at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks in the at least one I-frame that are not encrypted.

The data processing method provided by the embodiment of the present disclosure is applied to a data decryption device. By acquiring an image frame sequence, at least one I frame in the image frame sequence is found; according to a preset decryption algorithm, the at least one I frame is decrypted, and A sequence of decrypted image frames is generated from the decrypted at least one I-frame and other undecrypted frame images in the sequence of image frames. In the present disclosure, when the image frame sequence is decrypted, it is selectively decrypted according to the content of the frame image, thereby reducing the consumption of data processing resources in the data decryption process, especially when the image frame sequence is transmitted in real time, the amount of decrypted data is reduced. It can effectively reduce the transmission delay and improve the display effect of real-time transmission.

According to a third aspect of the embodiments of the present disclosure, a data processing system is provided, the system comprising: a data encryption device and a data decryption device; the data encryption device and the data decryption device are connected;

The data encryption device is used to obtain an image frame sequence, and find 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 unencrypted image frames in the image frame sequence and sending it to the data decryption device;

The data decryption device is used to obtain the encrypted image frame sequence, and find at least one I frame in the target video;

Decrypt the at least one I frame according to a preset decryption algorithm;

A sequence of decrypted image frames is generated from the decrypted at least one I-frame and other undecrypted image frames in the target video.

In one embodiment, the data encryption device in the system is further configured to:

Identify at least one macroblock in the target frame image, and determine the type corresponding to at least one macroblock in the I frame according to the identification result, and the type includes: text type or image type;

At least one I frame is encrypted according to the type corresponding to at least one macroblock in the I frame.

In one embodiment, the data decryption device in the system is also used to:

determining at least one encrypted macroblock in the at least one I frame according to encryption information corresponding to the at least one I frame, where the encryption information is used to indicate whether at least one macroblock in the at least one I frame is encrypted;

The at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks in the at least one I-frame that are not encrypted.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

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 structural diagram of a data processing system provided by an embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

An embodiment of the present disclosure provides a data processing method for a data encryption device. As shown in FIG. 1 , the data processing method includes the following steps:

101. Acquire a sequence of image frames, and find at least one I frame in the sequence of image frames.

In an alternative embodiment, the sequence of image frames may be generated from the target video data.

According to the highly compressed digital video codec standard H.264/AVC (Advanced Video Coding, Advanced Video Coding), the image frame sequence is classified into: I frame image data, P frame image data, B frame image data and then encoding and decoding processing; The I frame refers to the complete coded frame image, which is the reference frame for the coding process; the P frame refers to the frame image generated by referring to the previous I frame and only contains the coding of the difference part; the B frame refers to the frame image coded by the frames before and after the reference.

Therefore, in the present disclosure, when encrypting a sequence of image frames, at least one I frame in the sequence of image frames is first screened, which can not only ensure the quality of data processing, but also ensure the security of data.

102. Encrypt at least one I frame according to a preset encryption algorithm.

In an optional embodiment, encrypting at least one I frame according to a preset encryption algorithm, including:

Identify at least one macroblock in the target frame image, and according to the identification result, determine that at least one macroblock corresponding to the I frame is a text type macroblock or an image type macroblock;

At least one I frame is encrypted according to the type corresponding to at least one macroblock in the I frame.

In a specific encryption process, encrypting at least one I-frame according to a type corresponding to at least one macroblock in the I-frame, including, according to a preset encryption algorithm, encrypting a macroblock or at least one image type corresponding to at least one image type in the I-frame. A macroblock corresponding to a literal type is encrypted. Two specific embodiments are listed below to illustrate respectively:

In the first example, at least one I-frame is encrypted by encrypting all macroblocks corresponding to the text type and some macroblocks corresponding to the encrypted image type, wherein the valid macroblocks corresponding to the encrypted image type include:

When the type corresponding to at least one macroblock in the frame is an image type, obtain the target pixel value corresponding to at least one image macroblock;

According to the comparison result between the target pixel value corresponding to the at least one image macroblock and the preset pixel value, it is determined that the at least one image macroblock is a valid macroblock or an invalid macroblock;

At least one I-frame is encrypted by encrypting at least one valid macroblock, a macroblock corresponding to a literal type, and not encrypting at least one invalid macroblock.

Here are specific examples to illustrate how to divide macroblocks into valid image macroblocks or invalid image macroblocks: including:

First, the preset pixel value is determined, and in the current macroblock, the pixel value of a target pixel is selected as the preset pixel value; the target pixel can be a pixel at any position in the current macroblock or a pixel at a specified position point.

Second, calculating the difference between the target pixel value corresponding to the at least one image type macroblock and the preset pixel value;

Finally, when the difference between the target pixel value corresponding to the image type macroblock and the preset pixel value is within the preset value, the image macroblock is determined to be an invalid macroblock, otherwise, the current image block is considered to be a valid image block. For example, the color value corresponding to the preset pixel value is 200. If the difference between the pixel values corresponding to the remaining macroblocks and 200 is in the range of 0 to 3, the target pixel value corresponding to the image macroblock and the preset pixel value are assigned. The difference is within the preset value, that is, it can be considered as a pure color block without encryption processing.

In this example, because in the process of image data processing, for a macroblock of solid 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 this basis, the judgment condition is expanded. , for example, when the difference between the color values of all pixels in a macroblock is within the preset value, for example, there are 256 color values in 8-bit color depth, and when the difference is 1 to 2, it can also be judged It is a solid color block. Directly encrypts valid image blocks, and directly transmits without encrypting invalid image blocks, which can save encryption processing resources.

In the second example, at least one I-frame is encrypted by encrypting only all macroblocks corresponding to text types and not encrypting macroblocks corresponding to picture types. Specific steps include:

First, obtain an I frame and divide it into M×N macroblocks, where M is not less than 1 and N is not less than 1;

Second, identify each macroblock, and classify each macroblock into a text type macroblock or an image type macroblock according to the recognition result;

Finally, only text-type macroblocks are encrypted, and picture-type macroblocks are not encrypted.

In this step, the macroblocks corresponding to all character types are directly encrypted to obtain the typed macroblocks corresponding to the encrypted characters; the macroblocks corresponding to the image types are directly transmitted without being encrypted.

In this example, after each macroblock is classified into an image type or a text type, only the macroblocks corresponding to all text types are encrypted, and the macroblocks corresponding to the image type are not encrypted, but are directly sent. This scheme is more suitable for office situations, and its characteristics are: the transmitted image contains a lot of text information and involves more important key information, and the image information does not need to be encrypted.

In an optional embodiment, the present disclosure encrypts at least one I-frame according to a preset encryption algorithm, wherein the preset encryption algorithm includes multiple encryption algorithms.

Option 1: preset encryption algorithms, which may include symmetric encryption algorithms and asymmetric encryption algorithms.

Option 2: The selection of the preset encryption algorithm can be performed by presetting the encryption algorithm pool and determining the preset encryption algorithm through the encryption algorithm pool; wherein the encryption algorithm pool includes a preset number of encryption algorithms, and is performed on the macroblock to be encrypted. During encryption, the encryption algorithms are selected in sequence, or, during each encryption, an encryption algorithm pool is randomly selected for encrypting the current macroblock.

Further, specific examples are given to illustrate how to determine the preset encryption algorithm through the encryption algorithm pool. This includes selecting encryption algorithms in a preset order, or selecting encryption algorithms in random order.

Example 1, selecting a preset encryption algorithm according to a preset order, including: the encryption algorithm pool includes 8 encryption algorithms, and the preset order is set for these 8 encryption algorithms. During encryption, poll the encryption algorithms in the encryption algorithm pool in order to determine the currently used encryption algorithm to encrypt the current macroblock to be encrypted. In the next encryption, select the next encryption algorithm, such as the last encryption. If algorithm 3 is used, the current encryption uses algorithm 4, the next encryption uses algorithm 5, and so on. , and then select.

Example 2: The preset encryption algorithm is selected according to random order, that is, the selection of the preset encryption algorithm can also randomly select an encryption algorithm from the encryption algorithm pool each time the macroblock to be encrypted is encrypted, and the current macroblock to be encrypted is selected. Blocks are encrypted. A random number generator with a value range of 1-8 is preset in advance. When encrypting each time, the random number generator randomly generates a number, and confirms the encryption algorithm corresponding to the number as the encryption algorithm used at that time. For example, When the generated number is 7, the seventh encryption algorithm is selected.

The present disclosure adopts multiple encryption algorithms for encryption when encrypting at least one macroblock in an I frame, thereby greatly improving the difficulty of data being cracked and improving the security of data encryption.

103. Generate an encrypted image frame sequence according to the encrypted at least one I frame and other unencrypted image frames in the image frame sequence.

In an alternative embodiment, generating a sequence of encrypted image frames includes:

generating encryption information corresponding to at least one image frame in the image frame sequence according to the encryption algorithm and encryption state corresponding to at least one image frame in the image frame sequence;

After marking at least one image frame in the image frame sequence according to the encryption information, an encrypted image frame sequence is generated.

Specifically, in the process of encrypting the image frame, the packet header information corresponding to at least one macroblock in the image frame is obtained, and the packet header information is used to indicate the encryption information of the macroblock. The packet header information includes two data bits, one of which is a data bit. It is used to indicate the encryption state, that is, whether the current macroblock is encrypted, and another data bit is used to indicate the encryption algorithm, that is, the encryption algorithm information of the current macroblock.

Here is a specific example to illustrate: the generation of two data bits in the header information of the macroblock, wherein the length corresponding to the data bits used to indicate the encryption state of the current macroblock in the header information of the macroblock can be 1 bit (binary digit, bit), that is, whether the macroblock is encrypted is indicated by 0 or 1, for example, when the macroblock is encrypted, the bit value of the data bit is set to 0, and when the macroblock is encrypted, the bit value of the data bit is set to 0. bit value is set to 1. The length corresponding to the data bits used to indicate the encryption algorithm of the current macroblock in the header information of the macroblock depends on the type of encryption algorithm in the encryption algorithm pool. For example, when there are 8 encryption algorithms, the data Bits are set to at least 3bit.

In an optional embodiment, the present disclosure sends the encrypted image frame sequence to a receiving apparatus of the image frame sequence after generating the encrypted image frame sequence.

The data processing method provided by the embodiment of the present disclosure is applied to a data encryption device, by 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, and An encrypted image frame sequence is generated according to the encrypted at least one target frame image and other unencrypted frame images in the image frame sequence. When encrypting the image frame sequence, the present disclosure selectively encrypts according to the content of the frame image, thereby reducing the data processing resource consumption of the data encryption device, especially when the image frame sequence is transmitted in real time, the amount of encrypted data is reduced , which can effectively reduce the transmission delay and improve the display effect of real-time transmission.

Embodiment 2

Based on the data processing method provided by the above-mentioned embodiment corresponding to FIG. 1 , another embodiment of the present disclosure provides a data processing method, which can be applied to a data decryption apparatus. For example, the data decryption apparatus may be a terminal device or a network server, etc., It is not intended that the present disclosure be limited thereto. 2, the data processing method provided by this embodiment includes the following steps:

201. Acquire a sequence of image frames, and find at least one I frame in the sequence of image frames.

In an optional embodiment, decrypting at least one I-frame image according to a preset decryption algorithm includes:

Acquire code stream structure information corresponding to at least one I frame, where the code stream structure information includes parameter information and encryption information corresponding to at least one macroblock in the I frame;

According to the code stream structure information, the decryption sequence corresponding to at least one macroblock in the I frame is determined.

Further, the code stream structure information corresponding to the I frame is the data packet header information of at least one macroblock obtained by reading the code stream data corresponding to the encoded image frame sequence when the image frame sequence is obtained in the present disclosure. Used to identify the type and length of the corresponding macroblock, and also used to identify whether the current macroblock is encrypted and the corresponding encryption algorithm. According to the packet headers corresponding to all macroblocks in the I frame, the code stream structure information of the I frame is generated.

Therefore, the code stream structure information corresponding to at least one I frame includes parameter information and encryption information corresponding to at least one macroblock in the I frame;

The parameter information, including the type of the macroblock, the setting of the macroblock and the corresponding frame;

The encryption information, including whether the macroblock is encrypted and the corresponding encryption algorithm

In a specific embodiment, according to the code stream structure information, the order of each macroblock in the current I frame is confirmed, and combined into a complete frame of pictures in sequence, including

During the transmission process, the frame images in the image frame sequence are encoded into at least one macroblock. For example, an I frame contains four macroblocks, which are: A macroblock, B macroblock, C macroblock, D macroblock, The corresponding preset order is: A macroblock, B macroblock, C macroblock, D macroblock, and the four macroblocks are transmitted in sequence according to the preset order; The sequence of macroblocks in a frame image may be disrupted, such as A macroblock, B macroblock, D macroblock, and C macroblock; if the decoded image is decoded in the wrong macroblock sequence, it may be larger than the source image. Deviation, affecting the display effect.

Therefore, when obtaining the image frame sequence, the present disclosure adjusts the processing sequence of at least one macroblock in the received frame image according to the preset sequence, and then performs decryption and decoding, thereby further improving the quality and efficiency of decryption.

202. Decrypt at least one I-frame image according to a preset decryption algorithm.

In an optional embodiment, decrypting at least one I frame of image data, the method further includes:

Determine at least one encrypted macroblock in the at least one I frame according to encryption information corresponding to the at least one I frame, where the encryption information is used to indicate whether the at least one macroblock in the I frame is encrypted;

The at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks in the at least one I-frame that are not encrypted.

In a specific embodiment, according to the encrypted identification information in the code stream structure information corresponding to the I frame, the encrypted macroblock in the I frame can be found.

Further, when decrypting the encrypted macroblock, the encrypted information of the encrypted macroblock can be further parsed,

If the encrypted information includes an encryption algorithm corresponding to the encrypted macroblock, select a corresponding decryption algorithm to decrypt the current macroblock according to the encryption algorithm corresponding to the macroblock;

If the encrypted information does not include the encryption algorithm corresponding to the encrypted macroblock, the default decryption algorithm can be used for decryption.

The present disclosure determines at least one encrypted macroblock in the I frame by using the encryption information corresponding to at least one I frame, and decrypts only at least one encrypted macroblock, thereby reducing the amount of data to be decrypted, and realizing the improvement of data decryption efficiency. technical effect.

203. Generate a decrypted image frame sequence according to the decrypted at least one I frame and other undecrypted image frames in the image frame sequence.

For the encryption algorithm, only the I frame is encrypted, so only the I frame is decrypted during decryption, which improves the decryption efficiency.

The data processing method provided by the embodiment of the present disclosure is applied to a data decryption device. By acquiring an image frame sequence, at least one I frame in the image frame sequence is found; according to a preset decryption algorithm, the at least one I frame is decrypted, and A sequence of decrypted image frames is generated from the decrypted at least one I-frame and other undecrypted frame images in the sequence of image frames. In the present disclosure, when the image frame sequence is decrypted, it is selectively decrypted according to the content of the frame image, thereby reducing the consumption of data processing resources in the data decryption process, especially when the image frame sequence is transmitted in real time, the amount of decrypted data is reduced. It can effectively reduce the transmission delay and improve the display effect of real-time transmission.

Embodiment 3

Based on the data processing methods described in the embodiments corresponding to FIG. 1 and FIG. 2 , the following system embodiments of the present disclosure can be used to execute the method embodiments of the present disclosure.

An embodiment of the present disclosure provides a data processing system. As shown in FIG. 3 , the data processing apparatus 30 includes: a data encryption apparatus 301 and a data decryption apparatus 302;

The data encryption device is connected with the data decryption device;

A data encryption device, used for acquiring an image frame sequence, and finding at least one I frame in the image frame sequence;

Encrypt at least one I frame according to a preset encryption algorithm;

According to the encrypted at least one I frame and other unencrypted image frames in the image frame sequence, generate an encrypted image frame sequence and send it to the data decryption device;

A data decryption device for obtaining an encrypted image frame sequence and finding at least one I frame in the target video;

Decrypt at least one I frame according to a preset decryption algorithm;

A sequence of decrypted image frames is generated from the decrypted at least one I-frame and other undecrypted image frames in the target video.

In an optional embodiment, the data encryption apparatus 301 is further configured to:

Identify at least one macroblock in the target frame image, and determine the type corresponding to at least one macroblock in the I frame according to the identification result, and the type includes: text or image;

At least one I frame is encrypted according to the type corresponding to at least one macroblock in the I frame.

In an optional embodiment, the data encryption apparatus 301 further includes: a receiver, a processor and a transmitter,

the receiver, for receiving the sequence of image frames;

The processor is configured to encrypt at least one I frame according to a preset encryption algorithm;

generating a sequence of encrypted image frames according to the encrypted at least one I frame and other unencrypted image frames in the sequence of image frames;

The transmitter is used for sending the encrypted image frame sequence to the data decryption device.

In an optional embodiment, the data decryption apparatus 302 is further configured to:

Determine at least one encrypted macroblock in the at least one I frame according to encryption information corresponding to the at least one I frame, where the encryption information is used to indicate whether the at least one macroblock in the at least one I frame is encrypted;

The at least one I-frame is decrypted by decrypting the at least one encrypted macroblock and not decrypting the remaining macroblocks in the at least one I-frame that are not encrypted.

In an optional embodiment, the data decryption apparatus 302 further includes: a receiver, a processor and a transmitter,

The receiver is used to receive the sequence of encrypted image frames;

The processor is configured to decrypt at least one I frame according to a preset encryption algorithm;

generating a sequence of decrypted image frames according to the decrypted at least one I frame and other undecrypted image frames in the sequence of image frames;

The transmitter is used for sending the decrypted image frame sequence to the data display device.

In the data processing system provided by the embodiment of the present disclosure, the system includes a data encryption device and a data decryption device, and in the process of processing data, the system obtains an image frame sequence and finds at least one I frame in the image frame sequence; Preset encryption and decryption algorithms, encrypt and decrypt at least one I frame, and generate 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 At least one I frame and other unencrypted frame images in the image frame sequence generate an encrypted image frame sequence; when the present disclosure encrypts and decrypts the image frame sequence, selectively encrypts and decrypts according to the content of the frame image, Therefore, the data processing resource consumption of the data processing system is reduced, especially when the image frame sequence is transmitted in real time, the amount of encrypted data is reduced, the transmission delay can be effectively reduced, and the display effect of real-time transmission can be improved.

Based on the data processing methods described in the embodiments 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 (English). : Read Only Memory, ROM), random access memory (English: Random Access Memory, RAM), CD-ROM, magnetic tape, floppy disk and optical data storage devices, etc. The storage medium stores computer instructions for executing the data processing methods described in the embodiments corresponding to FIG. 1 and FIG. 2 , and details are not repeated here.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A data processing method applied to a data encryption apparatus, the method comprising:

acquiring an image frame sequence, and identifying at least one I frame and at least one other image frame in the image frame sequence, wherein the other image frame is a P frame or a B frame;

the at least one I-frame is encrypted while the at least one non-I-frame is unencrypted, thereby generating a sequence of encrypted image frames.

2. The method according to claim 1, wherein said encrypting said at least one I frame comprises:

determining a type corresponding to each macro block in the I frame image, wherein the type comprises: a text type or an image type;

when the I frame image comprises at least one image type macro block, determining whether each image type macro block is a valid macro block or an invalid macro block; encrypting the determined effective macro block, and simultaneously, carrying out non-encryption processing on the ineffective macro block; or, the whole image type macro block is encrypted.

3. The method of claim 2, wherein said encrypting said at least one I frame further comprises:

and when the I frame image comprises at least one character type macro block, encrypting the at least one character type macro block.

4. The method of claim 2, wherein said determining whether each of said picture type macroblocks is a valid macroblock or an invalid macroblock comprises:

acquiring a target pixel value corresponding to each image type macro block;

and determining that each image type macro block is an effective macro block or an invalid macro block according to a comparison result of a target pixel value and a preset pixel value corresponding to each image type macro block.

5. 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 according to an encryption algorithm and an encryption state corresponding to at least one image frame in the image frame sequence;

generating the sequence of encrypted image frames after marking the at least one image frame according to the encryption information.

6. The method according to any of claims 1 to 5, wherein said encrypting said at least one I-frame comprises:

and determining an encryption algorithm corresponding to the at least one I frame from an encryption algorithm pool, and encrypting the at least one I frame based on the determined encryption algorithm.

7. A data processing method applied to a data decryption apparatus, the method comprising:

acquiring an encrypted image frame sequence;

decrypting an encrypted image corresponding to an I frame in the encrypted image frame to obtain an I frame image;

and generating a decrypted image frame sequence according to the I frame image obtained by decryption and the unencrypted image corresponding to other frames in the encrypted image frame, wherein the other frames are P frames or B frames.

8. The method according to claim 7, wherein before performing the decryption process on the encrypted image data corresponding to the I-frame in the encrypted image frame, the method further comprises:

acquiring code stream structure information of an encrypted image corresponding to the 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.

9. An image encryption apparatus characterized by comprising: a receiver and a processor; wherein

The receiver is connected with the processor;

the receiver is used for acquiring an image frame sequence and identifying at least one I frame and at least one other image frame in the image frame sequence, wherein the other image frame is a P frame or a B frame;

the processor is configured to encrypt the at least one I frame and to un-encrypt the at least one non-I frame, thereby generating a sequence of encrypted image frames.

10. An image decryption apparatus, comprising: a receiver and a processor; wherein,

the receiver is connected with the processor;

the receiver is used for acquiring the encrypted image frame sequence;

the processor is used for decrypting an encrypted image corresponding to an I frame in the encrypted image frame to obtain an I frame image;

and generating a decrypted image frame sequence according to the I frame image obtained by decryption and the unencrypted image corresponding to other frames in the encrypted image frame, wherein the other frames are P frames or B frames.

Images