WO2021196960A1 - 加密视频通话方法、装置、设备和存储介质 - Google Patents

加密视频通话方法、装置、设备和存储介质 Download PDF

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Publication number
WO2021196960A1
WO2021196960A1 PCT/CN2021/078843 CN2021078843W WO2021196960A1 WO 2021196960 A1 WO2021196960 A1 WO 2021196960A1 CN 2021078843 W CN2021078843 W CN 2021078843W WO 2021196960 A1 WO2021196960 A1 WO 2021196960A1
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Prior art keywords
video
encoding
parameter
data
index
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PCT/CN2021/078843
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English (en)
French (fr)
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刘清
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百果园技术(新加坡)有限公司
刘清
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Publication of WO2021196960A1 publication Critical patent/WO2021196960A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working

Definitions

  • the embodiments of the present application relate to the technical field of video image processing, for example, to an encrypted video call method, device, device, and storage medium.
  • Video call is a common application scenario of the mobile Internet.
  • the ability of Internet communication lines to respond to threats is very low, and they are easily attacked by illegal users.
  • the communication lines of video calls can be physically damaged and wiretapping can be conducted, which poses a great threat to users' private data.
  • the video encoding data transmitted by the user is often encrypted to achieve the purpose of protecting the privacy of the user.
  • Common video encoding data encryption methods mainly use video encoding data as ordinary data for full encryption, for example, using secure socket layer protocol to transmit video encoding data, or before and after video encoding data transmission through a custom encryption method to encrypt, improve
  • the security of video calls due to the large amount of video encoded data, full encryption of the encoded data requires a large amount of resources and has an impact on the real-time nature of the video call.
  • the embodiments of the present application provide an encrypted video call method, device, equipment, and storage medium to realize the security of the video call, reduce the calculation overhead of the video encoding data encryption process, and improve the real-time performance of the video call.
  • an embodiment of the present application provides an encrypted video call method, which is applied to the sending end, and the method includes:
  • an embodiment of the present application provides an encrypted video call method, which is applied to the receiving end, and the method includes:
  • an embodiment of the present application provides an encrypted video call device, which is applied to the sending end, and the device includes:
  • An index determination module configured to determine the coding parameter of the video image, and determine the coding parameter index corresponding to the coding parameter according to a preset index information set;
  • An encoding processing module configured to perform encoding processing on the video image to generate video encoding data
  • the data sending module is configured to send the coding parameter index and the video coding data.
  • an encrypted video call device which is applied to a receiving end, and the device includes:
  • the data receiving module is set to receive video encoding data and encoding parameter index
  • the parameter determination module is configured to determine the decoding parameter in a preset encoding index set according to the encoding parameter index;
  • the video restoration module is configured to restore the video encoding data according to the decoding parameters to generate a call video.
  • an embodiment of the present application provides a device, which includes:
  • At least one processor At least one processor
  • Memory set to store at least one program
  • the at least one processor When the at least one program is executed by the at least one processor, the at least one processor implements the encrypted video call method according to any one of the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the encrypted video call method as described in any of the embodiments of the present application is implemented.
  • the video encoding data of the video image after the encoding process is obtained, and the encoding is passed through Parameter index and video encoding data realize the transmission of video images.
  • the attacker cannot restore the video encoding data to video images using only the encoding parameter index, which improves the security of video calls. Only the encoding parameter index of the video image is generated during the video call. There is no need to perform full encryption on the video image, which reduces the computational overhead of the video call and can improve the real-time performance of the video call.
  • FIG. 1 is a flowchart of an encrypted video call method provided in Embodiment 1 of the present application;
  • FIG. 2 is a flowchart of an encrypted video call method provided in Embodiment 2 of the present application.
  • FIG. 3 is a flowchart of an encrypted video call method provided in Embodiment 3 of the present application.
  • FIG. 4 is a flowchart of an encrypted video call method provided in the fourth embodiment of the present application.
  • FIG. 5 is an exemplary diagram of an encrypted video call method provided in the fourth embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an encrypted video call device provided by Embodiment 5 of the present application.
  • FIG. 7 is a schematic structural diagram of an encrypted video call device provided by Embodiment 6 of the present application.
  • FIG. 8 is a schematic structural diagram of a device provided in Embodiment 7 of the present application.
  • the sending end needs to process the video image into video encoding data and encoding parameters according to the encoding rules, and then the sending end sends the video encoding data and encoding parameters to the receiving end, where the encoding parameters can be to restore the video encoding data to video
  • the parameter set of the image for example, in the advanced video coding (MPEG-4 Part 10, Advanced Video Coding) rules, the coding parameters can include sequence parameter set (Sequence Paramater Set, SPS) and picture parameter set (Picture Paramater Set, PPS) .
  • the coding parameters can include information such as profile parameters, level parameters, image width, image height, and Deblock filter for processing video images, and the video coding data can be restored to video images through the coding parameters.
  • the video encoding data of the video is fully encrypted, which reduces the computational overhead of the video call process and can improve the real-time performance of the video call.
  • Fig. 1 is a flowchart of an encrypted video call method provided in the first embodiment of the present application. This embodiment is applicable to situations where the security of a video call is enhanced.
  • the method can be executed by an encrypted video call device, which can use hardware It can be implemented in at least one way among software and software.
  • the device can be applied to the sending end, the sending end can be a smart terminal, and the sending end can be set to make a video call.
  • the encrypted video call method of the embodiment of the present application includes Step 101 to step 103.
  • Step 101 Determine the coding parameter of the video image, and determine the coding parameter index corresponding to the coding parameter according to a preset index information set.
  • the video image may be a component of the call video, for example, it may be one frame of image or several frames of the call video, and the video image may be collected and obtained by the camera of the receiving end.
  • the preset index information set may be a data set that stores related parameters for processing video images, and may include encoding parameters and encoding parameter indexes for processing video images.
  • the preset index information set may be a collection of video images with different bit rates. Commonly used coding parameter generation, the coding parameter and the coding parameter index in the preset index information set can be stored in association, and the coding parameter index can be a unique identification number of the coding parameter.
  • the coding parameters required for encoding the video image during transmission can be selected according to the information such as the bit rate or resolution of the video image. It is understandable that the coding parameters can include information related to the organization of video encoding data, and can include Profile parameters, Information such as level parameter, image width, image height, Deblock filter, maximum available reference frame number and entropy coding type, etc.
  • the coding parameter index of the coding parameter can be determined in the preset index information set. The parameter index can indicate the encoding parameter during the transmission process, ensuring the safe transmission of the encoding parameter, and preventing the attacker from obtaining the restoration information of the video image.
  • the encoding parameter index and the encoding parameter in the preset index information set can be stored in association
  • a group of encoding parameters can correspond to an encoding parameter index.
  • the encoding parameter index can also be stored corresponding to the preset encoding parameter set code stream, and the corresponding parameter set code stream can be found through the encoding parameter index.
  • the parameter set code stream is a parameter set (such as SPS and PPS) that is compressed in a specific manner and stored in a binary form.
  • Step 102 Perform encoding processing on the video image to generate video encoding data.
  • the encoding processing can be the processing of data compression on the video image. Due to the redundant data such as spatial redundancy and temporal redundancy in the video image, the data volume of the video image is extremely large and cannot be transmitted through the transmission channel. It can be processed through encoding. Reduce the proportion of redundant data such as spatial redundancy and temporal redundancy in the video image, and achieve the effect of compressing the data.
  • Exemplary, common encoding processing methods can include H.261, H.263, and H.263 specified by the ITU. Coding rules such as H.264 and H.265, M-JPEG coding rules of the Motion Picture Experts Group, MPEG coding rules of the International Organization for Standardization Motion Picture Experts Group, etc.
  • the video encoding data can be a video image that has been encoded
  • the data amount of the video encoding data can be less than the original data amount of the video image
  • the video encoding data can be a binary data string.
  • the restoration of the video encoding data requires the assistance of encoding parameters. Analyze the meaning of the binary data string.
  • the video image may be encoded according to a determined encoding rule, and the encoded data may be used as video encoded data.
  • the encoding parameters can be used to initialize the encoder used in the encoding process and obtain the SPS data or PPS data used in the encoding process.
  • the SPS data or PPS data can be used to store and analyze the video encoding.
  • Data parameters can include the Profile parameter, level parameter, image width, image height, Deblock filter, maximum available reference frame number, and entropy coding type for parsing video encoding data, etc., which can be used after the initialization of the encoder is completed
  • the initialized encoder performs encoding processing on the video image to obtain video encoding data.
  • Step 103 Send the coding parameter index and the video coding data.
  • the encoding parameter index and video encoding data can be sent.
  • the encoding parameter index can be sent together with the video encoding data.
  • the encoding parameter index can also be sent
  • the video coded data is sent through a different channel.
  • the receiver can restore the video image after receiving the encoding parameter index and the video encoding data.
  • the technical solution of the embodiment of the present application determines the encoding parameter of the video image, and determines the encoding parameter index of the encoding parameter in the preset index information set, obtains the video encoding data of the video image, and sends the encoding parameter index and the video encoding data ,
  • To achieve encrypted video calls improve the security of video calls, reduce the computational overhead of the video call process, improve the real-time performance of video calls, and enhance the user experience.
  • the encrypted video call method provided in Embodiment 1 of the present application further includes:
  • At least one of the coding parameter and the coding parameter index in the preset index information set is updated regularly.
  • the preset index information set may also be updated regularly to prevent the corresponding encoding parameter from being inferred from the transmitted encoding parameter index.
  • the updating method may include updating the encoding parameters in the preset index information set, for example, the encoding parameters may be increased, decreased or updated, and may also include updating the encoding parameter index in the preset index information set, for example, the encoding parameters and the encoding parameters may be changed. Correspondence of the index.
  • FIG. 2 is a flowchart of an encrypted video call method provided in the second embodiment of the application.
  • the embodiment of the application is a refinement of the above-mentioned embodiment.
  • the transmission capacity of the transmission channel that carries the video image and the terminal device that carries the video image are used At least one of the processing capabilities of, determines the encoding parameters, and removes the video encoding file that generates at least one of the sequence parameter set and the image parameter set during encoding processing, and uses it as the video encoding data for transmission.
  • the encrypted video call method provided by the embodiment of the present application includes step 201 to step 206.
  • Step 201 Send a preset index information set.
  • the sending end may send the preset index information set to the receiving end before transmitting the image and video. It can be understood that the sending of the preset index information set is in an isolated state from the sending of the video image. The two do not affect each other.
  • the method of sending the preset index information set may include sending the preset index information set using a dedicated transmission channel, or by copying the preset index information set to a USB flash drive, and a dedicated person transfers the USB flash drive storing the preset index information set to Receiving end.
  • the receiving end obtains the preset index information set, the video call can be made.
  • the preset index information set can be sent only once before the video call.
  • the subsequent video call process can all use the preset index information set.
  • the encoding parameter index in the preset index information set may be stored in association with the encoding parameter and the parameter set code stream, where the encoding parameter may be parameter information for initializing the preset encoder, and the parameter set code stream may be the parameter information for initializing the preset decoder.
  • the parameter set code stream may include video parameter set (Video Parameter Set, VPS) data, SPS data, PPS data, and so on.
  • Step 202 Determine an encoding parameter according to at least one of the transmission capability of the transmission channel that carries the video image and the processing capability of the terminal device that carries the video image.
  • the transmission channel may be a channel for transmitting video images, and the transmission channel may have different transmission capabilities according to the quality of the network. If the network quality is better, the transmission capability of the transmission channel may be stronger.
  • the processing capability can be the ability of the terminal device to display or display video images. For example, if the device terminal can support video images in high-definition 4K mode, the processing capabilities of the device terminal can include support for high-definition 4K mode. It is understandable that the processing capabilities of the terminal device It can be the ability of the terminal device to display video images.
  • the current network quality can be determined to determine the transmission capacity of the transmission channel that transmits the video image, and the ability of the terminal device at the sending or receiving end to display the video image can be obtained.
  • the transmission capacity of the transmission channel is stronger, you can choose to improve the definition of the video image.
  • Coding parameters or when the processing capacity of the terminal device that displays the video image is stronger, you can choose the coding parameter that improves the definition of the video image. For example, you can also consider the transmission capacity of the transmission channel and the processing capacity of the terminal device.
  • the parameter for example, can select the coding parameter corresponding to the maximum processing capacity of the terminal device under the premise of ensuring that the transmission capacity of the transmission channel is satisfied.
  • Step 203 Search for the coding parameter index corresponding to the coding parameter in the preset index information set.
  • the encoding parameter and the encoding parameter index can be stored in association, and the association relationship between the encoding parameter and the encoding parameter index can be one-to-one correspondence, and a set of encoding parameters can have a unique encoding parameter index, and the encoding parameter index can be An identification symbol composed of letters, numbers or special symbols, for example, in order to improve security, coding parameter indexes may have a low degree of discrimination, so as to prevent attackers from inferring the corresponding coding parameters according to the coding parameter indexes.
  • the corresponding coding parameter index can be found in the preset index information set according to the coding parameter.
  • Step 204 Input the encoding parameters and the video image into a preset encoder and obtain original encoded data.
  • the preset encoder may be a device that performs encoding processing according to preset encoding rules, which may be implemented by at least one of software and hardware, and a variety of video encoding rules may be set in the preset encoder to realize video images.
  • the original encoded data may be data information generated by encoding a video image according to the encoding parameters.
  • the original encoded data may include video encoding data and auxiliary data for parsing the video encoded data, and the auxiliary data for parsing the video encoding data may include a sequence parameter set or an image parameter set. Wait.
  • the encoding parameters and the video image to be processed can be input into the preset encoder as input information, and the preset encoder compresses and encodes the video image according to the encoding parameters to reduce redundant information in the video image data, and the preset encoder It is assumed that the data output by the encoder is stored as the original encoded data. It is understandable that because different encoders have different preset encoding rules, different encoders can be used in this application.
  • the preset encoder includes at least one of an H.264 encoder and an H.265 encoder.
  • the preset encoder includes at least H.264 or H.265 encoding rules, and the preset encoder can generate different original encoded data according to different encoding rules.
  • the original encoded data can be It consists of two parts, one part may include video encoding data, and the other part may include sequence parameter set and image parameter set.
  • Step 205 Remove at least one of the sequence parameter set and the image parameter set in the original encoded data, and use the encoded data after removing at least one of the sequence parameter set and the image parameter set in the original encoded data as the actual Video encoding data sent.
  • the sequence parameter set may be a global parameter of a coded video sequence (Coded Video Sequence) in which the video image is stored, and the coded video sequence may be a sequence composed of the original video image frame by frame of pixel data after being encoded. It can describe the coding structure of the video coded data.
  • the image parameter set can be a dependent parameter of the video coded data generated after parsing and encoding of the original video image, and can describe the data content of the coded data.
  • At least one of the sequence parameter set used to assist in restoring the video image and the image parameter set used in assisting in restoring the video image may not be transmitted when the video image is transmitted, which can ensure that the encoded video image is attacked by the attacker.
  • the interception cannot be restored to normal video images.
  • the data used to assist in restoring the video image in the original encoded data can be deleted, the storage location of at least one of the sequence parameter set and the image parameter set in the video encoding file can be obtained, and the data at this location can be cleared Or overwrite to ensure that at least one of the sequence parameter set and the image parameter set cannot be recovered from the video encoding file after being deleted.
  • the video encoding file with at least one of the sequence parameter set and the image parameter set removed can be used as the video encoding data.
  • the transmitted video coded data may be the original coded data obtained by removing at least one of the sequence parameter data set and the image parameter set.
  • Step 206 Send the coding parameter index and the video coding data.
  • the encoding parameter index and video encoding data can be sent.
  • the encoding parameter index can be sent together with the video encoding data.
  • the encoding parameter index can also be sent
  • the video coded data is sent through a different channel.
  • the receiving end can restore the video image after receiving the encoding parameter index and the video encoding data.
  • the video coded data can be transmitted in plain text without the need to encrypt the video coded data, causing additional encryption and decryption performance overhead.
  • the encoding parameters are determined by the transmission capacity of the transmission channel corresponding to the video image and the processing capacity of the terminal device corresponding to the video image, Determine the encoding parameter index corresponding to the encoding parameter in the preset index information set, process the video image through the preset encoder and the encoding parameter to generate original encoded data, and remove at least one of the sequence parameter set and the image parameter set from the original encoded data Delete, and use the original encoded data of at least one of the deleted sequence parameter set and the image parameter set as the video encoded data, and send the video encoded data and the encoding parameter index.
  • the embodiments of the present application implement an encrypted call for a video call to ensure the security of video image transmission.
  • the encoding parameter index to identify the encryption parameter, there is no need to perform full encryption on the video image, which reduces the computational overhead and transmission load of the video call process. It can improve the real-time of the video call process and enhance the user experience.
  • the method before sending the preset index information set, the method further includes:
  • the preset encryption rule may be a rule for encrypting a preset index information set, and may include a symmetric encryption rule or an asymmetric encryption rule.
  • the preset index information set that stores the encoding parameters and the encoding parameter index can also be encrypted to ensure that the attacker cannot obtain the encoding parameters of the restored video image.
  • the preset index information set can be checked before sending the preset index information set.
  • the preset index information set is encrypted. For example, you can use the key set by the user to encrypt all the content in the preset index information set according to encryption rules such as RSA or Elliptic Curve Cryptography (ECC), or just
  • ECC Elliptic Curve Cryptography
  • Fig. 3 is a flowchart of an encrypted video call method provided in the third embodiment of the present application.
  • This embodiment can be applied to the situation of enhancing the security of video calls.
  • the method can be executed by an encrypted video call device, which can use hardware And software.
  • the device can be applied to the receiving end, the receiving end can be a smart terminal, and the receiving end can be set to make a video call.
  • the receiving end and sending The terminal can be located in the same smart terminal.
  • the encrypted video call method of the embodiment of the present application includes steps 301 to 303.
  • Step 301 Receive video encoding data and encoding parameter indexes.
  • the video encoded data may be a video image after encoding processing
  • the data amount of the video encoded data may be less than the original data amount of the video image
  • the video encoded data may be a binary data string.
  • the encoding parameter index may be information used to assist in restoring video encoded data, or may be identification information of decoding parameters for restoring video encoded data.
  • the video encoding data and the encoding parameter index can be received, the video encoding data and the encoding parameter index can be transmitted through the same channel, and the video encoding data and the encoding parameter index can also be transmitted through different channels.
  • the video encoding data and the encoding parameter index may have an association relationship. It can be understood that there is an association relationship between the received video encoding data and the encoding parameter index, for example, a video encoding
  • the data can correspond to a unique encoding parameter index.
  • Step 302 Determine a decoding parameter in a preset coding index set according to the coding parameter index.
  • the preset encoding index set may be a data set that stores related parameters for restoring video encoding data, and may include decoding parameters for restoring video encoding data, and the preset index information set may be commonly used by counting video images with different bit rates.
  • the encoding parameter index in the preset encoding index set can be stored in association with the decoding parameter.
  • the decoding parameter can include the parameter set code stream.
  • the parameter set code stream can be used to initialize the decoder that restores the video coded data.
  • the decoding parameter can also include the coded data generation decoder.
  • the coding parameters can be stored in a corresponding relationship with the parameter set code stream, and the corresponding parameter data set code stream can be obtained through the coding parameters to realize the initialization of the decoder. It is understandable that the decoding parameters can also include coding parameters and parameters For the set code stream, the coding parameter index can be stored in association with the coding parameters and the parameter set code stream.
  • the preset encoding index set can be stored in association with the decoding parameter and the encoding parameter index, and the corresponding decoding parameter can be found through the encoding parameter index.
  • the encoding parameter can be used to restore the video encoding data related information.
  • the decoding parameter can include VPS data.
  • At least two parameter set code streams in SPS data and PPS data, and the decoding parameters may also include parameter set code streams other than VPS data, SPS data and PPS data.
  • the parameter set code stream can be used to initialize the decoder, and the initialized decoder can restore the encoded video encoding data to the call video.
  • Step 303 Restore the video encoding data according to the decoding parameters to generate a call video.
  • the call video may be a video image generated after the video encoding data is restored, and the call video may be composed of one frame of video image or multiple frames of video image.
  • the video coded data can be restored through the decoding parameters.
  • the video coded data can be compressed and coded data, and can only include binary data. Each binary data in the video coded data needs to be decoded to assist in the analysis to obtain the meaning of each binary data. And can restore the video encoding data to the video image through the corresponding meaning, for example, the image height and image width of the encoding parameter, the video encoding data can be filled into the video image corresponding to the image height and image width, and fill according to the encoding parameters In this way, the video coded data is filled one by one to realize the restoration process of the video image, and the restored one or more frames of video images can be arranged in order in chronological order to generate the call video.
  • the decoding parameters can be input to the decoder to realize the initialization of the decoder, and the video coded data can be restored to the call video through the initialized decoder.
  • the technical solution of the embodiment of the present application receives the video encoding data and the encoding parameter index, and determines the decoding parameter corresponding to the encoding parameter index in the preset encoding index set according to the encoding parameter index, and restores the video encoding data through the decoding parameter to generate
  • the encoding parameter index is used to replace the encoding parameters for transmission during the video call, which can prevent the leakage of the encoding parameters of the restored video encoding data, improve the security of the video call process, reduce the encryption and decryption process of the video encoding data, and reduce the video call
  • the computational cost of the process improves the real-time performance of video calls and enhances the user experience.
  • the encrypted video call method provided in Embodiment 3 of the present application further includes: receiving and storing the preset encoding index set.
  • the preset encoding index set of the sender may be received, and the preset encoding index set may be stored locally. It is understandable that the way that the preset index information set is transmitted at the receiving end and the sending end can include using a dedicated transmission channel to transmit the preset index information set, or copy the preset index information set to a USB flash drive, and a dedicated person will store it.
  • the U disk with the preset index information set is transmitted to the receiving end.
  • Fig. 4 is a flowchart of an encrypted video call method provided in the fourth embodiment of the present application.
  • the embodiment of the present application is refined based on the above-mentioned embodiment, and can generally be integrated in the receiving end. See Fig. 4, the present application
  • the encrypted video call method provided by the embodiment includes steps 401 to 405.
  • Step 401 Receive video encoding data and encoding parameter indexes.
  • Step 402 Obtain a decryption key and decrypt a preset encoding index set according to the decrypted key.
  • the decryption key can be used to decrypt the data in the preset index set.
  • the decryption key can be a string composed of special characters, numbers and letters.
  • the decryption key can be pre-stored at the receiving end or input by the user.
  • the preset index information set storing the decoding parameter and the encoding parameter index may be in an encrypted state at the receiving end, and a decryption key may be obtained to decrypt the preset index information set during a video call.
  • the way of encrypting the preset index information set may include encrypting all content in the preset index information set, or it may include encrypting only the decoding parameters in the preset index information set, so that the decryption key cannot be obtained without obtaining the decryption key.
  • Set index information collection may include encrypting all content in the preset index information set, or it may include encrypting only the decoding parameters in the preset index information set, so that the decryption key cannot be obtained without obtaining the decryption key.
  • Step 403 Search for a decoding parameter in a preset encoding index set after decryption according to the encoding parameter index, where the decoding parameter includes at least one of a sequence parameter set and an image parameter set.
  • the decoding parameter and the encoding parameter index in the preset index information set may be stored in association, and the encoding parameter index may be an identification symbol composed of letters, numbers, or words.
  • the decoding parameter may be a parameter set code stream, and may include a sequence parameter set and an image parameter set. The corresponding sequence parameter set and image parameter set can be searched in the decrypted preset index information set according to the received encoding parameter index.
  • the coding parameter index can have a low degree of discrimination, so as to prevent the attacker from inferring the corresponding coding parameter according to the coding parameter index.
  • Step 404 Input at least one of the sequence parameter set and the image parameter set in the decoding parameters into a preset decoder, so as to realize the initialization of the preset decoder.
  • the preset decoder can restore the video coded data to the video image according to the preset decoding rules, which can be implemented by at least one of software and hardware, and the preset decoder can be provided with a variety of video decoding rules. , You can restore the decoded video encoding data.
  • the preset decoder may be initialized according to at least one of the generated sequence parameter set and the image parameter set to determine auxiliary information for restoring the video encoded data, and the preset decoder may be set to restore the corresponding video encoded data.
  • the initialized preset decoder can sequentially fill the video encoding data into the video image according to the data content and encoding structure in the auxiliary information.
  • Step 405 Input the video coding data into the initialized preset decoder for decoding and restoration, so as to generate a call video.
  • the video encoding data can be input into the initialized preset decoder, and the unreadable binary data state can be restored to the video image through the initialized preset decoder.
  • Multiple video images can be connected in chronological order to generate the call video, Realize the restoration of video coded data.
  • the preset encoding index set is decrypted according to the decryption key, and the sequence parameter set and the sequence parameter set in the decoding parameter corresponding to the encoding parameter index are searched in the decrypted preset encoding index set.
  • Image parameter set initialize the preset decoder according to the sequence parameter set and the image parameter set and decode the video encoding data to generate the call video, and use the encoding parameter index to replace the encoding parameter for transmission during the video call, which can prevent the leakage of the encoding parameter of the restored video encoding data , Improve the security of the video call process, reduce the computing overhead of the video call process, improve the real-time performance of the video call, and enhance the user experience.
  • FIG. 5 is an example diagram of an encrypted video call method provided in the fourth embodiment of the present application. See FIG. Appropriate encoding parameters and initialize the H.264 encoder.
  • the H.264 encoder encodes and processes the video image to generate video encoding data.
  • the video encoding data may not include the SPS data describing the encoding structure and the PPS data describing the encoding content.
  • the coding parameter determines the coding parameter index, and the coding parameter index and video coding data can be sent from the sending end A to the receiving end B.
  • Receiving end B can receive video encoding data and encoding parameter index, and search the plaintext of SPS and PPS data built in receiver B from the encoding parameter index.
  • the SPS and PPS data are encrypted when stored, and the decryption key can be built into the receiver.
  • terminal B it can also be input by the user, and the H.264 decoder can be started through the SPS and PPS data, and the video coded data can be decoded and restored according to the decoder, and the decoded and restored call video can be displayed.
  • Fig. 6 is a schematic structural diagram of an encrypted video call device provided in the fifth embodiment of the present application, which can execute the encrypted video call method provided in any embodiment of the present application, and has functional modules corresponding to the execution method.
  • the device can be implemented by at least one of software and hardware, and generally can be integrated in a smart terminal at the sending end, including: an index determination module 410, an encoding processing module 420, and a data sending module 430.
  • the index determining module 410 is configured to determine the encoding parameter of the video image, and determine the encoding parameter index corresponding to the encoding parameter according to a preset index information set.
  • the encoding processing module 420 is configured to perform encoding processing on the video image to generate video encoded data.
  • the data sending module 430 is configured to send the coding parameter index and the video coding data.
  • the encoding parameter of the video image is determined by the index determination module, and the encoding parameter index of the encoding parameter is determined in the preset index information set
  • the encoding processing module obtains the video encoding data of the video image
  • the data sending module indexes the encoding parameter Send with the video coded data to realize encrypted video calls, improve the security of video calls, reduce the computational overhead of the video call process, improve the real-time performance of video calls, and enhance the user experience.
  • FIG. 7 is a schematic structural diagram of an encrypted video call device provided in the sixth embodiment of the present application, which can execute the encrypted video call method provided in any embodiment of the present application, and has functional modules corresponding to the execution method.
  • the device can be implemented by at least one of software and hardware, and generally can be integrated into a smart terminal at the sending end, including: a data receiving module 510, a parameter determination module 520, and a video restoration module 530.
  • the data receiving module 510 is configured to receive video encoding data and encoding parameter indexes.
  • the parameter determination module 520 is configured to determine the decoding parameter in a preset encoding index set according to the encoding parameter index.
  • the video restoration module 530 is configured to restore the video encoding data according to the decoding parameters to generate a call video.
  • the video encoding data and the encoding parameter index are received through the data receiving module, the parameter determination module determines the corresponding decoding parameter in the preset encoding index set according to the encoding parameter index, and the video restoration module restores the video encoding data through the decoding parameter.
  • Generate call video use encoding parameter index instead of encoding parameter to be transmitted during the video call, which can prevent the leakage of the encoding parameter of the restored video encoding data, improve the security of the video call process, reduce the encryption and decryption process of video encoding data, and reduce the video
  • the calculation overhead of the call process improves the real-time performance of the video call and enhances the user experience.
  • FIG. 8 is a schematic structural diagram of a device provided in Embodiment 7 of the present application.
  • the device includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the device may be At least one, one processor 70 is taken as an example in FIG. 8; the processor 70, the memory 71, the input device 72, and the output device 73 in the device may be connected by a bus or other means. In FIG. 8, a bus connection is taken as an example.
  • the memory 71 can be configured to store software programs, computer-executable programs, and modules, such as the program modules corresponding to the encrypted video call method in the embodiment of the present application (for example, the index in the encrypted video call device).
  • the processor 70 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 71, that is, realizes the aforementioned encrypted video call method.
  • the memory 71 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal.
  • the memory 71 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the memory 71 may include a memory remotely provided with respect to the processor 70, and these remote memories may be connected to the device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • the input device 72 may be configured to receive input numeric or character information, and generate key signal input related to user settings and function control of the device.
  • the output device 73 may include a display device such as a display screen.
  • the eighth embodiment of the present application also provides a storage medium containing computer-executable instructions, when the computer-executable instructions are executed by a computer processor, they are used to execute an encrypted video call method, and the method includes at least one of the following:
  • Determine the encoding parameter of the video image determine the encoding parameter index corresponding to the encoding parameter according to the preset index information set, perform encoding processing on the video image to generate video encoding data, and send the encoding parameter index and the video encoding data;
  • a storage medium containing computer-executable instructions provided in the embodiments of the present application and the computer-executable instructions are not limited to the method operations described above, and can also execute the encrypted video call method provided in any embodiment of the present application. Related operations.
  • the present application can be implemented by software and necessary general-purpose hardware, and of course, it can also be implemented by hardware.
  • the technical solution of this application essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, Read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including several instructions to make a computer device (which can be a personal computer, A server, or a network device, etc.) executes the method described in each embodiment of the present application.
  • a computer device which can be a personal computer, A server, or a network device, etc.
  • the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding function can be realized; in addition, The names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present application.

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Abstract

本申请公开了一种加密视频通话方法、装置、设备和存储介质，其中，该方法包括：确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引；对所述视频图像进行编码处理以生成视频编码数据；发送所述编码参数索引和所述视频编码数据。

Description

加密视频通话方法、装置、设备和存储介质
本申请要求在2020年3月31日提交中国专利局、申请号为202010244156.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及视频图像处理技术领域，例如涉及一种加密视频通话方法、装置、设备和存储介质。
背景技术
视频通话是移动互联网的常见应用场景。互联网通信线路应对威胁的能力非常低，极容易被非法用户攻击，例如可以对视频通话的通信线路进行物理破坏并通过搭线的方式进行窃听，对用户的隐私数据具有极大的威胁。
相关技术中常对用户传输的视频编码数据进行加密达到保护用户隐私的目的。常见的视频编码数据加密的方式主要将视频编码数据作为普通数据进行全量加密，例如，使用安全套接层协议传输视频编码数据，又或者在视频编码数据传输前后通过自定义的加密方式进行加密，提高视频通话的安全性，然而，由于视频编码数据的数据量较大，对编码数据进行全量加密需要消耗较大的资源，且对视频通话的实时性产生影响。
发明内容
本申请实施例提供一种加密视频通话方法、装置、设备和存储介质，实现视频通话的安全性，降低视频编码数据加密过程的计算开销，提高视频通话的实时性。
第一方面，本申请实施例提供了一种加密视频通话方法，应用于发送端，该方法包括：
确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对 应的编码参数索引；
对所述视频图像进行编码处理以生成视频编码数据；
发送所述编码参数索引和所述视频编码数据。
第二方面，本申请实施例提供了一种加密视频通话方法，应用于接收端，该方法包括：
接收视频编码数据和编码参数索引；
根据所述编码参数索引，在预设编码索引集合中确定解码参数；
根据所述解码参数还原所述视频编码数据，以生成通话视频。
第三方面，本申请实施例提供了一种加密视频通话装置，应用于发送端，该装置包括：
索引确定模块，设置为确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引；
编码处理模块，设置为对所述视频图像进行编码处理以生成视频编码数据；
数据发送模块，设置为发送所述编码参数索引和所述视频编码数据。
第四方面，本申请实施例提供了一种加密视频通话装置，应用于接收端，该装置包括：
数据接收模块，设置为接收视频编码数据和编码参数索引；
参数确定模块，设置为根据所述编码参数索引，在预设编码索引集合中确定解码参数；
视频还原模块，设置为根据所述解码参数还原所述视频编码数据，以生成通话视频。
第五方面，本申请实施例提供了一种设备，该设备包括：
至少一个处理器；
存储器，设置为存储至少一个程序，
当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如本申请实施例中任一所述的加密视频通话方法。
第六方面，本申请实施例提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如本申请实施例中任一所述的加密视频通话方法。
本申请实施例的技术方案，通过确定视频图像的编码参数，并在预设编码参数索引中确定所述编码参数对应的编码参数索引，获取视频图像经过编码处理后的视频编码数据，通过传递编码参数索引和视频编码数据，实现视频图像的传输，攻击方无法仅使用编码参数索引将视频编码数据还原为视频图像，提高了视频通话的安全性，视频通话过程仅生成视频图像的编码参数索引，无需对视频图像进行全量加密，降低了视频通话的计算开销，可提高视频通话的实时性。
附图说明
图1是本申请实施例一提供的一种加密视频通话方法的流程图；
图2是本申请实施例二提供的一种加密视频通话方法的流程图；
图3是本申请实施例三提供的一种加密视频通话方法的流程图；
图4是本申请实施例四提供的一种加密视频通话方法的流程图；
图5是本申请实施例四提供的一种加密视频通话方法的示例图；
图6是本申请实施例五提供的一种加密视频通话装置的结构示意图；
图7是本申请实施例六提供的一种加密视频通话装置的结构示意图；
图8是本申请实施例七提供的一种设备的结构示意图。
具体实施方式
视频通话时，发送端需要根据编码规则将视频图像处理为视频编码数据和编码参数，再由发送端发送视频编码数据和编码参数到接收端，其中，编码参数可以是将视频编码数据还原为视频图像的参数集合，例如，在高级视频编码(MPEG-4 Part 10,Advanced Video Coding)规则中，编码参数可以包括序列参数 集(Sequence Paramater Set,SPS)和图像参数集(Picture Paramater Set,PPS)。编码参数中可以包括处理视频图像的Profile参数、level参数、图像宽度、图像高度和Deblock滤波器等信息，可以通过编码参数将视频编码数据还原为视频图像。本申请实施例中在传输视频图像时，仅传输视频图像的编码参数索引和视频编码数据，使得攻击者无法根据传输的信息还原视频图像，保障了视频通话的安全性，视频通话过程无需对传输的视频编码数据进行全量加密，减少了视频通话过程的计算开销，可提高视频通话的实时性。
实施例一
图1是本申请实施例一提供的一种加密视频通话方法的流程图，本实施例可适用于增强视频通话安全性的情况，该方法可以由加密视频通话装置来执行，该装置可以采用硬件和软件中的至少一种方式来实现，通常该装置可以应用于发送端，发送端可以是智能终端，发送端可以设置为进行视频通话，参见图1，本申请实施例的加密视频通话方法包括步骤101至步骤103。
步骤101、确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引。
其中，视频图像可以是通话视频的组成部分，例如，可以是通话视频的一帧图像或者几帧图像，视频图像可以由接收端的摄像头采集并获取。预设索引信息集合可以是存储用于处理视频图像的相关参数的数据集合，可以包括用于处理视频图像的编码参数和编码参数索引，预设索引信息集合可以是通过统计不同码率的视频图像常用的编码参数生成，预设索引信息集合中编码参数和编码参数索引可以关联存储，编码参数索引可以是编码参数的唯一标识号。
可以根据视频图像的码率或者分辨率等信息选择该视频图像在进行传输时编码视频图像需要的编码参数，可以理解的是，编码参数可以包括组织视频编码数据的相关信息，可以包括Profile参数、level参数、图像宽度、图像高度、Deblock滤波器、最大可用参考帧数和熵编码类型等信息，确定视频图像的编码 参数后可以在预设索引信息集合中确定该编码参数的编码参数索引，编码参数索引可以在传输过程中表示编码参数，确保编码参数的安全传输，可以防止攻击方获取到视频图像的还原信息，可以理解的是，预设索引信息集合中编码参数索引和编码参数可以关联存储，一组编码参数可以对应一个编码参数索引，可以理解的是，编码参数索引还可以与预设的编码参数集码流对应存储，可以通过编码参数索引查找到的对应的参数集码流。需要说明的是，参数集码流为参数集(比如SPS和PPS)经过特定方式压缩，并以二进制的形式存储得到。
步骤102、对所述视频图像进行编码处理以生成视频编码数据。
其中，编码处理可以是对视频图像进行数据压缩的处理，由于视频图像中存在空间冗余和时间冗余等冗余数据，视频图像的数据量极大无法通过传输信道进行传输，可以通过编码处理降低空间冗余和时间冗余等冗余数据在视频图像中的比例，起到压缩数据的效果，示例性的，常见的编码处理方式可以包括国际电联制定的H.261、H.263、H.264和H.265等编码规则，运动静止图像专家组的M-JPEG编码规则，国际标准化组织运动图像专家组的MPEG编码规则等。其中，视频编码数据可以是经过编码处理后的视频图像，视频编码数据的数据量可以小于视频图像的原始数据量，视频编码数据可以是二进制数据串，视频编码数据的还原需要编码参数的协助以解析二进制数据串的含义。
在本申请实施例中，可以通过确定的编码规则对视频图像进行编码处理，可以将经过编码处理后的数据作为视频编码数据。示例性的，可以在确定视频图像的编码参数后，使用编码参数初始化编码处理使用的编码器并获取编码处理过程使用的SPS数据或者PPS数据，SPS数据或者PPS数据为可以用于存储解析视频编码数据的参数，例如，可以包括解析视频编码数据的Profile参数、level参数、图像宽度、图像高度、Deblock滤波器、最大可用参考帧数和熵编码类型等，可以在完成编码器的初始化后，使用初始化后的编码器对视频图像进行编码处理获取视频编码数据。
步骤103发送所述编码参数索引和所述视频编码数据。
在获取到视频图像对应的编码参数索引和视频编码数据后，可以将编码参数索引和视频编码数据进行发送，编码参数索引可以与视频编码数据一同发送，为了提高安全性，也可以将编码参数索引与视频编码数据通过不同的信道发送。接收方可以在接收到编码参数索引和视频编码数据后还原出视频图像。
本申请实施例的技术方案，通过确定视频图像的编码参数，并在预设索引信息集合中确定编码参数的编码参数索引，获取视频图像的视频编码数据，将编码参数索引和视频编码数据进行发送，实现加密视频通话，提高视频通话的安全性，减少视频通话过程的计算开销，提高视频通话的实时性，增强了用户的体验程度。
可选的，本申请实施例一提供的加密视频通话方法，还包括：
定时更新所述预设索引信息集合中的编码参数和编码参数索引中的至少之一。
在本申请实施例中，为了提高视频通话的安全性，还可以定时对预设索引信息集合进行更新，防止通过传输的编码参数索引推测出对应的编码参数。更新的方式可以包括更新预设索引信息集合中的编码参数，例如，可以增加、减少或者更新编码参数，还可以包括更新预设索引信息集合中编码参数索引，例如，可以更改编码参数与编码参数索引的对应关系。
实施例二
图2是本申请实施例二提供的一种加密视频通话方法的流程图，本申请实施例是对上述实施例的细化，通过承载视频图像的传输信道的传输能力和承载视频图像的终端设备的处理能力中的至少之一，确定编码参数，并在编码处理时将去除生成序列参数集和图像参数集中的至少之一的视频编码文件，作为传输使用的视频编码数据。参见图2，本申请实施例提供的加密视频通话方法包括步骤201至步骤206。
步骤201、发送预设索引信息集合。
在本申请实施例中，发送端在进行图像视频的传输之前，可以将预设索引信息集合发送到接收端，可以理解的是，预设索引信息集合的发送与视频图像的发送处于隔离状态，两者之间互不影响。
发送预设索引信息集合的方式可以包括使用专用传输信道发送预设索引信息集合，也可以通过将预设索引信息集合拷入U盘，由专人将存储有预设索引信息集合的U盘传递给接收端。当接收端获取到预设索引信息集合后可以在进行视频通话，预设索引信息集合可以在视频通话之前仅发送一次，后续视频通话过程可以均使用该预设索引信息集合，可以理解的是，预设索引信息集中编码参数索引可以与编码参数和参数集码流关联存储，其中，编码参数可以是初始化预设编码器的参数信息，参数集码流可以是初始化预设解码器的参数信息，参数集码流可以包括视频参数集(Video Parameter Set，VPS)数据、SPS数据和PPS数据等。
步骤202、根据承载视频图像的传输信道的传输能力和承载视频图像的终端设备的处理能力中的至少之一，确定编码参数。
其中，传输信道可以是传输视频图像的信道，传输信道可以根据网络质量的好坏具有不同的传输能力，网络质量较好是，传输信道的传输能力可以更强。处理能力可以是终端设备显示或者展示视频图像的能力，例如，设备终端可以支持高清4K模式的视频图像，则设备终端的处理能力可以包括支持高清4K模式，可以理解的是，终端设备的处理能力可以是终端设备展示视频图像的能力。
可以确定当前网络质量以确定传递视频图像的传输信道的传输能力，可以获取发送端或者接收端的终端设备展示视频图像的能力，当传输信道的传输能力更强时，可以选择提高视频图像清晰度的编码参数，或者当展示视频图像的终端设备的处理能力更强时，可以选择提高视频图像清晰度的编码参数，示例性的，还可以同时考虑传输信道的传输能力和终端设备的处理能力选择编码参 数，例如，可以在保证满足传输信道的传输能力的前提下，选择终端设备最大处理能力对应的编码参数。
步骤203、在所述预设索引信息集合中查找所述编码参数对应的编码参数索引。
预设索引信息集合中可以将编码参数和编码参数索引关联存储，编码参数与编码参数索引的关联关系可以为一一对应，一组编码参数可以存在唯一的一个编码参数索引，编码参数索引可以为字母、数字或者特殊符号组成的标识符号，示例性的，为提高安全性，编码参数索引之间可以具有低区分度，避免攻击方根据编码参数索引推测到对应的编码参数。可以根据编码参数在预设索引信息集合查找到对应的编码参数索引。
步骤204、将所述编码参数和所述视频图像输入预设编码器并获取原始编码数据。
其中，预设编码器可以是按照预设的编码规则进行编码处理的装置，可以通过软件和硬件中的至少一种方式实现，预设编码器内部可以设置有多种视频编码规则以实现视频图像的编码处理。原始编码数据可以是视频图像按照编码参数进行编码生成的数据信息，原始编码数据可以包括视频编码数据和解析视频编码数据的辅助数据，解析视频编码数据的辅助数据可以包括序列参数集或者图像参数集等。
可以将编码参数和待进行处理的视频图像作为输入信息输入到预设编码器中，由预设编码器根据编码参数对视频图像进行压缩编码，减少视频图像数据中的冗余信息，可以将预设编码器输出的数据存储为原始编码数据。可以理解的是，由于不同编码器预设的编码规则不同，因此，本申请可以采用不同的编码器。
可选的，预设编码器至少包括H.264编码器和H.265编码器中一种。
在本申请实施例中，预设编码器中至少包括H.264或者H.265编码规则， 预设编码器可以根据不同的编码规则生成不同的原始编码数据，可以理解的是，原始编码数据可以包括两部分，一部分可以包括视频编码数据，另一部分可以包括序列参数集和图像参数集。
步骤205、去除所述原始编码数据内的序列参数集和图像参数集中的至少之一，将去除所述原始编码数据内的序列参数集和图像参数集中的至少之一后的编码数据，作为实际发送的视频编码数据。
其中，序列参数集可以是保存有视频图像的编码视频序列(Coded Video Sequence)的全局参数，编码视频序列可以由原始的视频图像的一帧一帧的像素数据经过编码后的结构组成的序列，可以描述视频编码数据的编码结构，图像参数集可以是保存原始的视频图像的解析经编码后生成的视频编码数据的依赖参数，可以描述编码数据的数据内容。
在本申请实施例中，传输视频图像时可以不传输用于辅助还原视频图像的序列参数集和用于辅助还原视频图像的图像参数集中的至少之一，可保证编码后的视频图像被攻击方拦截也无法还原为正常的视频图像。示例性的，可以将原始编码数据中用于辅助还原视频图像的数据删除，可以获取序列参数集和图像参数集中的至少之一在视频编码文件中的存储位置，可以将该位置上的数据清除或者覆盖，保证序列参数集和图像参数集中的至少之一被删除后无法从视频编码文件中恢复，可以将去除序列参数集和图像参数集中的至少之一的视频编码文件作为视频编码数据，实际发送的视频编码数据可以是原始编码数据去除序列参数据集和图像参数集中的至少之一得到的原始。
步骤206、发送所述编码参数索引和所述视频编码数据。
在获取到视频图像对应的编码参数索引和视频编码数据后，可以将编码参数索引和视频编码数据进行发送，编码参数索引可以与视频编码数据一同发送，为了提高安全性，也可以将编码参数索引与视频编码数据通过不同的信道发送。接收端可以在接收到编码参数索引和视频编码数据后还原出视频图像。在本申 请实施例中，视频编码数据可以明文传输，无需对视频编码数据进行加密，造成额外的加解密性能开销。
本申请实施例的技术方案，通过将预设索引信息集合发送到接收端，在进行视频通话时，通过视频图像对应的传输信道的传输能力和视频图像对应的终端设备的处理能力确定编码参数，在预设索引信息集合中确定编码参数对应的编码参数索引，通过预设编码器和编码参数处理视频图像生成原始编码数据，并将序列参数集和图像参数集中的至少之一从原始编码数据中删除，并将删除序列参数集和图像参数集中的至少之一的原始编码数据作为视频编码数据，将视频编码数据和编码参数索引发送。本申请实施例实现了视频通话的加密通话，保证视频图像传输的安全性，通过使用编码参数索引标识加密参数，无需对视频图像进行全量加密，减少了视频通话过程的计算开销和传输负荷量，可提高视频通话过程的实时性，增强了用户的体验程度。
可选的，在发送所述预设索引信息集合之前，还包括：
根据预设加密规则加密所述预设索引信息集合。
其中，预设加密规则可以是对预设索引信息集合进行加密的规则，可以包括对称加密规则或者非对称加密规则。
为了提高视频通话的安全性，还可以对存储编码参数和编码参数索引的预设索引信息集合进行加密，保证攻击方无法获取到还原视频图像的编码参数，可以在发送预设索引信息集合之前对预设索引信息集合进行加密，例如，可以使用用户设定的密钥按照RSA或者椭圆曲线加密(Elliptic Curves Cryptography，ECC)等加密规则对预设索引信息集合中所有内容进行加密，也可以仅对预设索引信息集合中的编码参数进行加密，使得没有得到授权的接收端无法根据编码参数索引还原视频图像。
实施例三
图3是本申请实施例三提供的一种加密视频通话方法的流程图，本实施例 可适用于增强视频通话安全性的情况，该方法可以由加密视频通话装置来执行，该装置可以采用硬件和软件中的至少一种方式来实现，通常该装置可以应用于接收端，接收端可以是智能终端，接收端可以设置为进行视频通话，示例性的，本申请实施例中的接收端和发送端可以位于相同的智能终端。参见图3，本申请实施例的加密视频通话方法包括步骤301至步骤303。
步骤301、接收视频编码数据和编码参数索引。
其中，视频编码数据可以是经过编码处理后的视频图像，视频编码数据的数据量可以小于视频图像的原始数据量，视频编码数据可以是二进制数据串。编码参数索引可以是用于辅助还原视频编码数据的信息，可以是还原视频编码数据的解码参数的标识信息。
可以接收视频编码数据和编码参数索引，视频编码数据和编码参数索引可以通过相同信道传输，视频编码数据和编码参数索引也可以通过不同信道传输。当视频编码数据和编码参数索引通过不同信道传输时，视频编码数据和编码参数索引可以存在关联关系，可以理解的是，接收到的视频编码数据和编码参数索引存在关联关系，例如，一个视频编码数据可以对应唯一的一个编码参数索引。
步骤302、根据所述编码参数索引，在预设编码索引集合中确定解码参数。
其中，预设编码索引集合可以是存储还原视频编码数据的相关参数的数据集合，可以包括用于还原视频编码数据的解码参数，预设索引信息集合可以是通过统计不同码率的视频图像常用的编码参数生成，可以理解的是，接收端和发送端内的预设编码索引集合可以相同，也可以不同。预设编码索引集合中编码参数索引可以与解码参数关联存储，解码参数可以包括参数集码流，参数集码流可以用于初始化还原视频编码数据的解码器，解码参数也可以包括生成编码数据的编码参数，编码参数可以与参数集码流按照对应关系存储，可以通过编码参数获取到对应的参数据集码流实现对解码器的初始化，可以理解的是， 解码参数还可以包括编码参数和参数集码流，编码参数索引可以与编码参数和参数集码流关联存储。
预设编码索引集合中可以关联存储有解码参数和编码参数索引，可以通过编码参数索引查找到对应的解码参数，编码参数可以是用于还原视频编码数据相关信息，例如，解码参数可以包括VPS数据、SPS数据和PPS数据中的至少两种参数集码流，解码参数的还可以包括除VPS数据、SPS数据和PPS数据之外的参数集码流。参数集码流可以用于初始化解码器，初始化后的解码器可以将编码视频编码数据还原为通话视频。
步骤303、根据所述解码参数还原所述视频编码数据，以生成通话视频。
其中，通话视频可以是视频编码数据还原后生成的视频图像，通话视频可以由一帧视频图像或者多帧视频图像构成。
可以通过解码参数还原视频编码数据，视频编码数据可以是经过压缩编码后的数据，可以仅包括二进制数据，视频编码数据中的每个二进制数据需要解码参数辅助解析获取到每个二进制数据的含义，并可以通过相应的含义将视频编码数据还原为视频图像，例如，编码参数的图像高度和图像宽度，可以将视频编码数据填充到对应图像高度和图像宽度的视频图像中，并根据编码参数规定填充方式将视频编码数据一一填充实现视频图像的还原过程，可以将还原后的一帧或者多帧视频图像按照时间顺序依次排列生成通话视频。例如，可以将解码参数输入到解码器实现对解码器的初始化，可以将视频编码数据通过初始化后的解码器还原为通话视频。
本申请实施例的技术方案，通过接收视频编码数据和编码参数索引，并根据编码参数索引在预设编码索引集合中确定编码参数索引对应的解码参数，通过解码参数对视频编码数据进行还原以生成通话视频，利用编码参数索引替代编码参数在视频通话过程中传输，可防止还原视频编码数据的编码参数泄露，提高视频通话过程的安全性，减少了视频编码数据的加解密过程，减少了视频 通话过程的计算开销，提高视频通话的实时性，增强了用户的体验。
可选的，本申请实施例三提供的加密视频通话方法，还包括：接收并存储所述预设编码索引集合。
在本申请实施例中，在进行视频通话之前可以接收发送端的预设编码索引集合，并将该预设编码索引集合存储在本地。可以理解的是，预设索引信息集合在接收端和发送端传输的方式可以包括使用专用传输信道传输预设索引信息集合，也可以通过将预设索引信息集合拷入U盘，由专人将存储有预设索引信息集合的U盘传输给接收端。
实施例四
图4是本申请实施例四提供的一种加密视频通话方法的流程图，本申请实施例是以上述实施例为基础进行的细化，一般可以集成在接收端中，参见图4，本申请实施例提供的加密视频通话方法包括步骤401至步骤405。
步骤401、接收视频编码数据和编码参数索引。
步骤402、获取解密密钥并根据所解密密钥解密预设编码索引集合。
其中，解密密钥可以用于解密预设索引集合中的数据，解密密钥可以是特殊字符、数字和字母组成的字符串，解密密钥可以预先存储在接收端，也可以由用户输入。
存储解码参数和编码参数索引的预设索引信息集合在接收端可以处于加密状态，在进行视频通话时，可以获取解密密钥对预设索引信息集合进行解密。预设索引信息集合加密的方式可以包括使用对预设索引信息集合中所有内容进行加密，也可以包括仅对预设索引信息集合中的解码参数进行加密，使得没有得到解密密钥无法获取到预设索引信息集合。
步骤403、根据所述编码参数索引在解密后的预设编码索引集合查找解码参数，其中，所述解码参数包括序列参数集和图像参数集中的至少一种。
本申请实施例中，预设索引信息集合中解码参数和编码参数索引可以关联存储，编码参数索引可以为字母、数字或者文字组成的标识符号。解码参数可以是参数集码流，可以包括序列参数集和图像参数集。可以根据接收到的编码参数索引在解密后的预设索引信息集中查找对应的序列参数集和图像参数集。为提高安全性，编码参数索引之间可以具有低区分度，避免攻击方根据编码参数索引推测到对应的编码参数。
步骤404、将所述解码参数中的序列参数集和图像参数集中的至少之一输入预设解码器，以实现所述预设解码器的初始化。
其中，预设解码器可以按照预设的解码规则将视频编码数据还原为视频图像的装置，可以通过软件和硬件中的至少一种方式实现，预设解码器内部可以设置有多种视频解码规则，可以还原解码视频编码数据。
预设解码器可以根据生成的序列参数集和图像参数集中的至少之一进行初始化，确定还原视频编码数据的辅助信息，可以设置预设解码器用于对应的还原视频编码数据。例如，初始化后的预设解码器可以根据辅助信息中的数据内容和编码结构将视频编码数据依次填充到视频图像。
步骤405、将视频编码数据输入初始化后的预设解码器进行解码还原，以生成通话视频。
可以将视频编码数据输入到初始化后的预设解码器中，通过初始化后的预设解码器从不可读的二进制数据状态还原为视频图像，可以将多个视频图像按照时间顺序连接生成通话视频，实现对视频编码数据的还原。
本申请实施例，通过接收视频编码数据和编码参数索引，根据解密密钥解密预设编码索引集合，在解密后的预设编码索引集合中查找编码参数索引对应的解码参数中的序列参数集和图像参数集，依据序列参数集和图像参数集初始化预设解码器并解码视频编码数据生成通话视频，利用编码参数索引替代编码参数在视频通话过程中传输，可防止还原视频编码数据的编码参数泄露，提高 视频通话过程的安全性，减少了视频通话过程的计算开销，提高视频通话的实时性，增强了用户的体验。
示例性的，图5是本申请实施例四提供的一种加密视频通话方法的示例图，参见图5，加密视频通话方法包括发送端A和接收端B，发送端A可以采集视频图像，选择合适的编码参数并初始化H.264编码器，由H.264编码器编码处理视频图像，生成视频编码数据，视频编码数据中可以不包括描述编码结构的SPS数据和描述编码内容的PPS数据，由编码参数确定编码参数索引，可以将编码参数索引和视频编码数据由发送端A发到接收端B。接收端B可以接收视频编码数据和编码参数索引，由编码参数索引查找内置在接收端B中的SPS和PPS数据明文，其中SPS和PPS数据在存储时为加密状态，解密密钥可以内置在接收端B中，也可以由用户输入，可以通过SPS和PPS数据启动H.264解码器，根据解码器对视频编码数据进行解码还原，可以将解码还原后的通话视频进行显示。
实施例五
图6是本申请实施例五提供的一种加密视频通话装置的结构示意图，可执行本申请任意实施例提供的加密视频通话方法，具备执行方法相应的功能模块。该装置可以由软件和硬件中的至少一种方式实现，一般可以集成在发送端的智能终端，包括：索引确定模块410、编码处理模块420和数据发送模块430。
索引确定模块410，设置为确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引。
编码处理模块420，设置为对所述视频图像进行编码处理以生成视频编码数据。
数据发送模块430，设置为发送所述编码参数索引和所述视频编码数据。
本申请实施例，通过索引确定模块确定视频图像的编码参数，并在预设索引信息集合中确定编码参数的编码参数索引，编码处理模块获取视频图像的视 频编码数据，数据发送模块将编码参数索引和视频编码数据进行发送，实现加密视频通话，提高视频通话的安全性，减少视频通话过程的计算开销，提高视频通话的实时性，增强了用户的体验程度。
实施例六
图7是本申请实施例六提供的一种加密视频通话装置的结构示意图，可执行本申请任意实施例提供的加密视频通话方法，具备执行方法相应的功能模块。该装置可以由软件和硬件中的至少一种方式实现，一般可以集成在发送端的智能终端，包括：数据接收模块510、参数确定模块520和视频还原模块530。
数据接收模块510，设置为接收视频编码数据和编码参数索引。
参数确定模块520，设置为根据所述编码参数索引，在预设编码索引集合中确定解码参数。
视频还原模块530，设置为根据所述解码参数还原所述视频编码数据，以生成通话视频。
本申请实施例，通过数据接收模块接收视频编码数据和编码参数索引，参数确定模块根据编码参数索引在预设编码索引集合确定对应的解码参数，视频还原模块通过解码参数对视频编码数据进行还原以生成通话视频，利用编码参数索引替代编码参数在视频通话过程中传输，可防止还原视频编码数据的编码参数泄露，提高视频通话过程的安全性，减少了视频编码数据的加解密过程，减少了视频通话过程的计算开销，提高视频通话的实时性，增强了用户的体验程度。
实施例七
图8是本申请实施例七提供的一种设备的结构示意图，如图8所示，该设备包括处理器70、存储器71、输入装置72和输出装置73；设备中处理器70的数量可以是至少一个，图8中以一个处理器70为例；设备中的处理器70、存储器71、输入装置72和输出装置73可以通过总线或其他方式连接，图8中以通 过总线连接为例。
存储器71作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请实施例中的加密视频通话方法对应的程序模块(例如，加密视频通话装置中的索引确定模块410、编码处理模块420和数据发送模块430，或者，数据接收模块510、参数确定模块520和视频还原模块530)。处理器70通过运行存储在存储器71中的软件程序、指令以及模块，从而执行设备的各种功能应用以及数据处理，即实现上述的加密视频通话方法。
存储器71可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器71可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器71可包括相对于处理器70远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
输入装置72可设置为接收输入的数字或字符信息，以及产生与设备的用户设置以及功能控制有关的键信号输入。输出装置73可包括显示屏等显示设备。
实施例八
本申请实施例八还提供一种包含计算机可执行指令的存储介质，所述计算机可执行指令在由计算机处理器执行时，用于执行一种加密视频通话方法，该方法包括以下至少之一：
确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引，对所述视频图像进行编码处理以生成视频编码数据，发送所述编码参数索引和所述视频编码数据；
接收视频编码数据和编码参数索引，根据所述编码参数索引在预设编码索 引集合确定解码参数，根据所述解码参数还原所述视频编码数据以生成通话视频。
当然,本申请实施例所提供的一种包含计算机可执行指令的存储介质,其计算机可执行指令不限于如上所述的方法操作,还可以执行本申请任意实施例所提供的加密视频通话方法中的相关操作。
通过以上关于实施方式的描述，所属领域的技术人员可以清楚地了解到，本申请可借助软件及必需的通用硬件来实现，当然也可以通过硬件实现。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、闪存(FLASH)、硬盘或光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
值得注意的是，上述加密视频通话装置的实施例中，所包括的各个单元和模块只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；另外，各功能单元的名称也只是为了便于相互区分，并不用于限制本申请的保护范围。

Claims (14)

  1. 一种加密视频通话方法，应用于发送端，所述方法包括：
    确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引；
    对所述视频图像进行编码处理以生成视频编码数据；
    发送所述编码参数索引和所述视频编码数据。
  2. 根据权利要求1所述的方法，其中，所述确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引，包括：
    根据承载所述视频图像的传输信道的传输能力和承载所述视频图像的终端设备的处理能力中的至少之一，确定编码参数；
    在所述预设索引信息集合中查找所述编码参数对应的编码参数索引。
  3. 根据权利要求1或2所述的方法，其中，所述对所述视频图像进行编码处理以生成视频编码数据，包括：
    将所述编码参数和所述视频图像输入预设编码器并获取原始编码数据；
    去除所述原始编码数据内的序列参数集和图像参数集中的至少之一，将去除所述原始编码数据内的序列参数集和图像参数集中的至少之一后的编码数据，作为实际发送的视频编码数据。
  4. 根据权利要求1所述的方法，还包括：
    定时更新所述预设索引信息集合中的编码参数和编码参数索引中的至少之一。
  5. 根据权利要求3所述的方法，还包括：
    发送所述预设索引信息集合。
  6. 根据权利要求5所述的方法，在发送所述预设索引信息集合之前，还包括：
    根据预设加密规则加密所述预设索引信息集合。
  7. 一种加密视频通话方法，应用于接收端，所述方法包括：
    接收视频编码数据和编码参数索引；
    根据所述编码参数索引，在预设编码索引集合中确定解码参数；
    根据所述解码参数还原所述视频编码数据，以生成通话视频。
  8. 根据权利要求7所述的方法，还包括：
    接收并存储所述预设编码索引集合。
  9. 根据权利要求7所述的方法，其中，所述根据所述编码参数索引，在预设编码索引集合中确定解码参数，包括：
    获取解密密钥并根据所述解密密钥解密所述预设编码索引集合；
    根据所述编码参数索引在解密后的所述预设编码索引集合中查找解码参数，其中，所述解码参数包括序列参数集和图像参数集中的至少一种。
  10. 根据权利要求7或9所述的方法，其中，所述根据所述解码参数还原所述视频编码数据，以生成通话视频，包括：
    将所述解码参数中的序列参数集和图像参数集中的至少之一，输入预设解码器以实现所述预设解码器的初始化；
    将视频编码数据输入初始化后的预设解码器进行解码还原，以生成通话视频。
  11. 一种加密视频通话装置，应用于发送端，所述装置包括：
    索引确定模块，设置为确定视频图像的编码参数，并根据预设索引信息集合确定所述编码参数对应的编码参数索引；
    编码处理模块，设置为对所述视频图像进行编码处理以生成视频编码数据；
    数据发送模块，设置为发送所述编码参数索引和所述视频编码数据。
  12. 一种加密视频通话装置，应用于接收端，所述装置包括：
    数据接收模块，设置为接收视频编码数据和编码参数索引；
    参数确定模块，设置为根据所述编码参数索引，在预设编码索引集合中确定解码参数；
    视频还原模块，设置为根据所述解码参数还原所述视频编码数据，以生成通话视频。
  13. 一种设备，包括：
    至少一个处理器；
    存储器，设置为存储至少一个程序，
    当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-10中任一所述的加密视频通话方法。
  14. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时，实现如权利要求1-10中任一所述的加密视频通话方法。
PCT/CN2021/078843 2020-03-31 2021-03-03 加密视频通话方法、装置、设备和存储介质 WO2021196960A1 (zh)

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