An Improved Digital Raster Map Data Hiding Algorithm Based on H.264/AVC Intra Prediction

To comply with the security and high efficiency requirements for network based publishing of digital raster maps, this paper proposes a data hiding algorithm based on H.264/AVC. Firstly, by adopting the characteristics of H.264 intra frame encoding, we divided nine intra prediction modes of H.264 video (derived from 4×4 luminance blocks) into groups according to the directional approximation. Then, we established the mapping relationship between digital raster data and the prediction model, based on an analysis of the current block prediction mode and digital raster map data characteristics, and hid digital raster map data using this mapping. Experiments verified that the proposed method effectively reduces video distortion caused by embedding data and effectively limited aincrease in the video bit rate. At the same time, this embedding and extraction process was simple and fast.