Variable Block Size Transforms with Higher Order Kernels for (Ultra) High Definition Video Coding

摘要

In this paper, 16-order and 32-order integer transform kernels are designed for the HD video coding in H.264|MPEG-4 AVC and the performance analyses for large transforms are presented. An adaptive block size transform coding scheme is also proposed based on the proposed transform kernels. Thus, additional 16-order (16 × 16, 16 × 8 and 8 × 16) and 32-order (32 × 32, 32 × 16 and 16 × 32) transforms are performed in addition to 8 × 8 and 4×4 transforms which are exploited in the Fidelity Range Extension of H.264|MPEG-4 AVC. The experimental results show that the variable block size transforms with the proposed higher order transform kernels yields 14.96% of bit saving in maximum for HD video sequences.