H.265 inverse transform FPGA implementation in Impulse C

Abstract

High Efficiency Video Coding (HEVC), a modern video compression standard, exceeds the predecessor H.264 in efficiency by 50%, but with cost of increased complexity. It is one of main research topics for FPGA engineers working on image compression algorithms. On the other hand high-level synthesis tools after few years of lower interest from the industry and academic research, started to gain more of it recently. This paper presents FPGA implementation of HEVC 2D Inverse DCT transform implemented on Xilinx Virtex-6 using Impulse C high level language. Achieved results exceed 1080p@30fps with relatively high FPGA clock frequency and moderate resource usage.