Research on a robust reversible steganography method based on BCH code

摘要

Aiming at the phenomenon of permanent distortion of the original carrier in the H.264/AVC video steganography process, the paper proposes a robust reversible steganography method based on BCH code. The method not only can effectively restore the secret information, but also can make the original carrier recovery. Before the information is embedded, the secret information is encoded by BCH, and then the special embedded blocks are selected by prediction mode to control the frame distortion drift. When embedding the information, the absolute value of the modified coefficient is larger than that of the set value by using the single coefficient. When the secret information is extracted, the error correction is carried out first, and then the coefficient value of DCT modified when embedded secret information is restored according to the algorithm. Experimental results show that the proposed method has good robustness and good visual effect, and is reversible.