Intra-predictive transforms for image coding

摘要

This paper presents a new transform framework, intra-predictive transforms, for block-based image coding. The proposed framework unifies cross-block prediction and transforms within a block. Thus, it can exploit both the intra- and inter- block correlations. The intra-prediction in H.264 can be viewed as a special case of intra-predictive transforms. The new framework provides more flexibility to design new transform for coding. As an example, a new intra-predictive transform based on frequency domain prediction is also presented to show the advantages of the proposed framework.