Modified Pixel Value Ordering-based Predictor for Reversible Data Hiding on Video

Abstract

Communication security has become an issue where massive data exchanges take place. Hiding personal data in a particular file during transmission can be a possible way to protect those data. Nevertheless, some parameters, such as stego file quality and the data capacity, are still challenging. In this paper, a method that modified Pixel-based Pixel Value Ordering (PPVO) Predictor is proposed for reversible data hiding on video. PPVO can embed the payload into a pixel whose value equals the maximum or minimum context pixel. To increase the number of payloads embedded, we modify the PPVO method by using only both right and bottom pixels to develop the predictors. The embedding process is carried out if the considered pixel has the same value as that in the right or bottom. The experimental result shows that this method has a significant increase in the embedding capacity and quality. Nevertheless, the overall maximum capacity of each cover is less than some other methods, while its corresponding quality is still the highest.