A unified and pipelined hardware architecture for implementing intra prediction in HEVC

Abstract

The High Efficiency Video Coding (HEVC) standard can achieve significant improvements in coding performance over H.264/AVC. To achieve significant coding improvements in intra-predictive coding, HEVC relies on the use of an extended set of intra-prediction modes and prediction block sizes. This paper presents a unified hardware architecture for implementing all 35 intra-prediction modes that include the planar mode, the DC mode, and all angular modes for all prediction unit (PU) sizes ranging from 4 × 4 to 64 × 64 pixels. We propose the use of a unified reference sample indexing scheme that avoids the need for sample re-arrangement suggested in the HEVC reference design. The hardware architecture is implemented on a Xilinx Virtex 5 device (XC5VLX110T) for which we report power measurements, resource utilization, and the average number of required cycles per pixel.