Information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation

An information hiding and coefficient technology, applied in the field of information hiding, can solve the problems of large carrier capacity, large code rate increase, and low embedding efficiency

Active Publication Date: 2015-06-03
INST OF ACOUSTICS CHINESE ACAD OF SCI +1
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Problems solved by technology

[0004] The above several information hiding methods have the following problems: intra-frame prediction mode modulation only appears in I frame; motion vector modulation can only be applied when there is inter-frame estimation; entropy coding directly modifies code stream elements will introduce large video distortion ; while integer transforms appear in all types of coded frames, the large capacity of the carrier means large embedding capacity. In addition, information hiding algorithms based on modulation of integer transform coefficients generally have low complexity and do not require re-encoding, which is more suitable for real-time coding process, has the advantage of a wider utilization of space
However, the existing integer transform coefficient modulation information hiding methods have problems such as low embedding efficiency and large increase in code rate introduced.

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  • Information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation
  • Information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation
  • Information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation

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Embodiment Construction

[0056] An information hiding and extraction method based on integer DCT coefficient modulation according to the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0057] Such as figure 1 As shown, a kind of information hiding method based on integer DCT coefficient modulation of the present invention, described information hiding method comprises:

[0058] Step 1) Construct an N-dimensional 2N+1-order Rubik's Cube matrix, which satisfies that each dimension has 2N+1 coordinates, and has (2N+1)N elements in total, and each element has a value range of [0,2N ] between 2N+1 base numbers, with any element as the center, together with the values ​​of 2N adjacent elements in the remaining dimensions, constitute a continuous integer from 0 to 2N;

[0059] Step 2), in the macroblock process of H.264 / AVC encoded video, calculate the texture complexity of the current macroblock according to the average texture complexity (...

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Abstract

The invention provides an information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation. An N-dimensional 2N+1-order magic cube matrix is constructed, carrier coefficients are respectively mapped in the N-dimensional 2N+1-order magic cube matrix by taking N carrier coefficients as a group, so as to obtain a mapping value, a value of to-be-embedded 2N+1 system number secret information is compared with the mapping value, if the two values are equal, the group of the carrier coefficients do not need to be modified, if the two values are not equal, only one carrier coefficient needs to be modified, so that the mapping value is equal to the to-be-embedded value, one carrier coefficient is modified, so that the embedding of formula bits of the secret information is completed, the embedding efficiency reaches up to formula, and the modification rate of the carrier coefficient is only 1/N, so that a computing process is simple, and the information hiding and extracting efficiency is improved.

Description

technical field [0001] The invention relates to the field of information hiding, in particular to an information hiding and extracting method based on integer DCT coefficient modulation. Background technique [0002] The continuous development of information technology has brought convenience to people's life, but it has also brought many problems such as information authentication, copyright protection, and secret communication. Information hiding technology can solve these problems well. It is a technology that embeds secret information into common carriers, and achieves the purpose of transmitting secret information by hiding the secret communication itself. [0003] The increasingly mature Internet and digital multimedia application technology make the transmission and exchange of audio, image, video and other multimedia information very convenient. Because of its intuition, determinism, and high efficiency, video information, especially the continuous development of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N19/176
Inventor 李松斌付江云刘鹏戴琼兴邓浩江
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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