HEVC Information-Hiding Algorithm Based on Intra-Prediction and Matrix Coding

Aiming at the problem that the data-hiding algorithm of high efficiency video coding (HEVC) has great influence on the video bit rate and visual quality, an information-hiding algorithm based on intra-prediction mode and matrix coding is proposed. Firstly, eight prediction modes are selected from 4x4 luminance blocks in I frame to embed the hidden information. Then, the least significant bit (LSB) algorithm is used to modulate the LSB of the last prediction mode. Finally, the modulated luminance block is re-encoded to embed four bits secret information. Experimental results show that the algorithm improves the embedding capacity, guarantees the subjective and objective quality of the video, and the bit rate increases by 1.14% on average.