Predictive Coding In Video Coding

Aimed at the higher coding efficiency of video compression, this paper proposes a novel concept named "Secondary Prediction" onto the traditional hybrid video coding scheme. To achieve higher efficiency of predictive coding, "Secondary Prediction" combins multiple high efficient prediction techniques together, thus enables a kind of spatio-temporal three-dimensional prediction into the hybrid coding scheme and can benefit from latest developments of both intra-prediction and inter-prediction technique.Along with the detailed design and implementation of two sets of "Secondary Prediction" system, this paper provides innovative key techniques for the secondary prediction such as the non-squared intra-frame prediction, predictor of Most Probable Secondary Mode under directional criteria from imge predictor and the dynamic updating of mode indicator. Experimental results show significant BD bit rate saving among test sequences whose sizes are from QCIF to 720p, which is 2%-7% for different sequences and 4.05% (equivalent 0.14dB of BD PSNR gain) in average among high-definition (720p) test sequences for the propsed technique compared to H.264/AVC: At last, 17 potential development and optimization possibilities of the "Secondary Prediction" systems are listed and described for future work.