Method for hiding HEVC video information

An information hiding and video technology, applied in the field of information hiding, can solve the problems of low information embedding rate, general applicability, and inability to directly apply HEVC video.

CN104159117AActive Publication Date: 2014-11-19NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-11-19

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Abstract

The invention provides a method for hiding HEVC (High Efficiency Video Coding) video information. The method comprises two steps of secret information embedding and secret information extracting; during secret information embedding, a prediction model is modulated in an intra-frame prediction coding process aiming at 4*4 prediction units by analyzing an HEVC coding and decoding structure, an intra-frame coding mode is selected in a self-adapting manner by using a Lagrangian rate-distortion model to decide whether to embed secret information; a corresponding relation between two bits of information to be embedded and angle difference intervals of the prediction model, completed information embedding of the prediction model is corrected according to the two bits of information to be embedded, a prediction model of only one prediction unit in the two continuous 4*4 prediction units in most cases is required to be corrected, so that correction bits is reduced under the same hiding capacity, and influence on the video quality, which is caused by the embedded secret information is reduced; objective and subjective video quality can be well ensured, and influence on a video bitstream, which is caused by the embedded secret information is greatly reduced.
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Description

technical field

[0001] The present invention relates to an information hiding technology, in particular to an information hiding method for HEVC (High Efficiency Video Coding) video. Background technique

[0002] With the wide application of multimedia and the rapid development of network technology, the application and dissemination of digital information has become an indispensable part of people's life. At the same time, the phenomenon of counterfeiting, tampering and attacking of digital information is becoming more and more serious, and the problem of information security is becoming more and more prominent. Information hiding technology helps to curb the illegal use of digital multimedia. At present, information hiding technology has become a research hotspot in the field of information security.

[0003] HEVC is a new-generation video compression coding standard formulated by the International Telecommunication Organization and the Mobile Video Expert Group. It is a ...

Examples

Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0052] There are three basic units introduced in HEVC video, namely coding unit (CU), prediction unit (PU) and transform unit (TU). There are four sizes of coding units, namely 64×64, 32×32, 16×16, 8×8, such as figure 2As shown, a coding unit with a size of 64×64 can be divided into four coding units with a size of 32×32 using a quadtree structure, and a coding unit with a size of 32×32 can be divided into four coding units with a size of 16×16. Coding unit, a coding unit with a size of 16×16 can be divided into four coding units with a size of 8×8. In the quadtree structure, a coding unit with a size of 64×64 has a depth of 0 and a size of 32×32 The depth of the coding unit is 1, the depth of the coding unit with the size of 16×16 is 2, and the depth of the coding unit with the size of 8×8 is 3; the prediction unit is the unit that transfer...