Adaptive Quadrilateral-Shape Block Partitioning for Effective Bit-Reduced Intra-Prediction in Next-Step of H.265/HEVC

We present a new image compression or intra-frame coding approach, which is based on a quadrilateral-shape polygon unit for reducing spatial redundancies. The proposed method partitions raw video frame data to quadrilateral-shape polygon unit first, and then predicts, transforms, quantizes and compresses the partitioned quadrilateral polygon. Performance evaluations have shown that the proposed method achieves 25% of bit-savings compared to the current intra-frame encoding method of H.265.