High-throughput interpolation hardware architecture with coarse-grained reconfigurable datapaths for HEVC

Fractional-pel interpolation for motion estimation and motion compensation is one of the key computational hotspots in the new High Efficient Video Coding (HEVC) standard. This work presents a high-throughput interpolation hardware architecture to improve performance of HEVC encoding and decoding. It employs two acceleration engines for luma and chroma filtering, each with 12-pel-parallel coarse-grained reconfigurable interpolation datapaths. An adaptive scheduling scheme manages the operation of these interpolation datapaths in different ways depending upon the prediction unit (PU) size and the execution scenario (i.e. motion estimation or motion compensation). We have implemented our hardware architecture in 150 nm technology. Compared to state-of-the-art techniques [12], our architecture required 49% less hardware area, while processing QFHD (3840×2160) resolution @ 30 fps.