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Hevc Video Data Hiding Method in Encrypted Domain Based on Residual Coefficient Modulation

A technology of video data and residual coefficients, which is used in digital video signal modification, image communication, electrical components, etc.

Active Publication Date: 2020-04-10
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to realize data hiding under the premise of ciphertext, how to ensure that encryption and data hiding are compatible with codec, and how to ensure that encrypted and embedded data does not affect the coding efficiency of HEVC, there are no related literature reports at home and abroad.

Method used

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  • Hevc Video Data Hiding Method in Encrypted Domain Based on Residual Coefficient Modulation
  • Hevc Video Data Hiding Method in Encrypted Domain Based on Residual Coefficient Modulation
  • Hevc Video Data Hiding Method in Encrypted Domain Based on Residual Coefficient Modulation

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Embodiment 1

[0108] This embodiment proposes a method for hiding HEVC video data in an encrypted domain based on residual coefficient modulation, which includes three parts: HEVC video encryption, HEVC video data hiding in the encrypted domain, and secret data extraction.

[0109] In this specific embodiment, in order to reduce the computational complexity, keep the code rate of the encrypted HEVC video code stream unchanged, and have high perceptual security, the method of the present invention selects the motion vector difference (MVD) symbol The CABAC binary string (bin string) and the CABAC binary string of the quantized residual coefficient sign are encrypted, such as Figure 1a As shown, the HEVC video encryption process is as follows: For the original HEVC video, for all macroblocks whose prediction mode is inter prediction mode and whose motion vector difference is not 0, use the binary pseudo-random sequence pair generated by the first key The CABAC binary string of the motion vect...

Embodiment 2

[0190] A method for hiding HEVC video data in an encrypted domain based on residual coefficient modulation proposed in this embodiment includes three parts: HEVC video encryption, HEVC video data hiding in the encrypted domain, and secret data extraction, wherein HEVC video encryption and HEVC in the encrypted domain The two parts of video data hiding are the same as the HEVC video encryption in the first embodiment and the two parts of the HEVC video data hiding in the encrypted domain are correspondingly the same, but the secret data extraction part of this embodiment is different from the secret data extraction of the first embodiment. The secret data extraction of the above is completed in the encrypted domain, and the secret data extraction in this embodiment is completed in the decrypted domain. In some cases, the user needs to decrypt the encrypted video first, and then extract the secret information from the decrypted video. ) authorized users receive encrypted videos ...

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Abstract

The invention discloses an encryption domain HEVC video data hiding method based on a residual coefficient modulation. The method comprises three parts of HEVC video encryption, HEVC video data hidingand secret data extraction; a syntax element of a bypass coding mode in CABAC is selected to perform equal-length binary string replacement operation to realize video encryption, a residual coefficient modulation method is used for performing data hiding, encryption and data hiding generate no change to the code rate of the HEVC video code stream, and the problem of data expansion in video encryption and data hiding is solved; the video encryption and data hiding are all done under CABAC entropy coding, and are fully compatible with CABAC entropy coding, and the standard HEVC video decoder can be used for decoding the encrypted and data-hiding video code stream; and the secret data can be effectively extracted in the encryption domain, and the secret data can also be effectively extractedin a decryption domain, that is, the data extraction is completely separate from the decryption, so that the practicability is higher.

Description

technical field [0001] The present invention relates to a method for hiding video data, in particular to a method for hiding HEVC video data in an encrypted domain based on residual coefficient modulation. Background technique [0002] With the rapid development of network and multimedia technology, video data is growing explosively. Massive video processing requires corresponding storage and computing platforms. Cloud computing and cloud storage technology provide the most effective solution for big data processing and related applications. Program. In order to ensure content security and privacy protection in the cloud computing environment, the content owner encrypts the original video data and uploads it to the cloud. All processing and calculations in the cloud are performed in the encrypted domain, ensuring the security of sensitive video data. [0003] In many application scenarios, some cloud service managers without decryption authority need to embed some additiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/13H04N19/176H04N19/467H04N19/70
CPCH04N19/13H04N19/176H04N19/467H04N19/70
Inventor 徐达文
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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