A method and a device for detecting hidden information of a video stream
A technology for hiding information and video streams, applied in the field of video processing, can solve the problems of high detection feature dimension, time-consuming and labor-intensive, complex video data structure, etc., to save time, improve detection efficiency, and improve the quality of detection results.
Active Publication Date: 2019-06-07
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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[0004] After research, the inventor found that the detection feature of the above method has limitations, and the detection feature is manually designed, which consumes time, energy and computing resources; the detection feature has a great impact on the detection results of hidden information in the video stream; The multimedia data structure is more complex, and the dimensionality of the required detection features is also higher. Manual design of detection features is more challenging.
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[0037] In order to enable those skilled in the art to better understand the solutions of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only It is a part of the embodiments of this application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.
[0038] At present, H.264 video streams with high compression efficiency and wide network adaptability have a large number of DCT coefficients, and the possibility of hiding information in the DCT coefficients is greater. Common methods for modifying hidden information based on DCT coefficients include Lin method, Ma method, Nakajima K method, Wong K method, etc. Although these method...
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The invention discloses a method and a device for detecting hidden information of a video stream. The method comprises the following steps: calling a decoding library to decompress the video stream tobe detected to obtain a plurality of video frames; Carrying out convolution operation on each video frame by utilizing the A preset convolution kernels to obtain A residual noise matrixes of each video frame; Performing quantitative truncation operation on the A residual noise matrixes of each video frame by utilizing the B different quantitative truncation parameters to obtain A * B quantitativeresidual noise matrixes of each video frame; And inputting the A * B quantized residual noise matrixes of each video frame into a preset convolutional neural network model for hidden information detection to obtain a detection result of the to-be-detected video stream. Therefore, after the operations of decompression, convolution, quantitative truncation and the like are carried out on the videostream, hidden information detection is carried out in combination with the preset convolutional neural network model, and the model can automatically extract detection characteristics in the quantitative residual noise matrix, so that time, energy and computing resources are saved, and the detection efficiency and the detection result quality are improved.
Description
Technical field [0001] This application relates to the field of video processing technology, and in particular to a method and device for detecting hidden information in a video stream. Background technique [0002] With the rapid development of science and technology, video technology has gradually been widely used in daily life, so it is easy for attackers to use video streams to hide information for attacks, causing security threats such as malicious code proliferation and information leakage. Especially the video stream using the H.264 encoding algorithm, because of its high compression efficiency, wide network adaptability and a large number of discrete cosine transform (English: Discrete Cosine Transform, abbreviation: DCT) coefficients, resulting in H.264 video The DCT coefficients in the stream are more likely to hide information. [0003] Since modifying the hidden information in the video stream based on the DCT coefficients will affect the spatial correlation of the dat...
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IPC IPC(8): H04N21/234H04N21/44H04N19/467
Inventor 陈性元杜学绘孙奕罗远焱秦若熙张东巍曹利峰
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU