Abstract
Video has become the most important medium for communication among people. Video has become the most important medium for communication among people. Therefore, reversible data hiding technologies for video have been developed so that information can be hidden in the video without damaging the original video in order to be used in the copyright protection and distribution field of video. This paper proposes a practical and genuine reversible data hiding method by using a multi-dimensional histogram shifting scheme on QDCT coefficients in the H.264/AVC bitstream. The proposed method defines the vacant histogram bins as a set of n-dimensional vectors and finds the optimal vector space, which gives the best performance, in a 4 × 4 QDCT block. In addition, the secret message is mapped to the optimal vector space, which is equivalent to embedding the information into the QDCT block. The simulation results show that the data hiding efficiency is the highest among the compared five existing methods. In addition, the image distortion and maximum payload capacity are measured quite high.
Highlights
With the fast and inexpensive network environment and the increasing distribution of digital content, there is growing concern about copyright infringement as well
A specific position of the quantization table is divided by a constant k and the corresponding quantized discrete cosine transform (QDCT) value is multiplied by the same k to create k-array data hiding spaces
We propose a genuine reversible data hiding (RDH) technique that utilize a histogram shifting method on mid-frequency QDCT
Summary
With the fast and inexpensive network environment and the increasing distribution of digital content, there is growing concern about copyright infringement as well. One way to prevent copyright infringement is to hide copyright information such as copyright holders, camera source identification number, and distributors in the digital content, and use the secretly hidden information as evidence when the content is illegally used later. Such copyright information may change from time to time for various reasons, so it must be deleted and rewritten again and again. If you use reversible data hiding technology to hide the copyright or distribution information in your content, there is no need to worry about the content damage caused by frequent information modifications. Securing the originality and reliability of these images is an important issue [1] and can be achieved by reversibly hiding time stamp or hash information
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