Design and Implementation of 5-D IIR Depth Velocity Filters for Light Field Video Processing

Abstract

The design and hardware implementation of a lowcomplexity signal processing algorithm is proposed for real-time depth-velocity filtering in 5-D light field videos (LFVs). The proposed design is based on a stable 5-D infinite impulse response (IIR) digital filter having three cascaded sections, each synthesized using the concept of multidimensional passive network resonance. A novel semi-systolic hardware implementation is proposed. Each section of the filter is implemented and tested on a Xilinx Virtex-7 FPGA platform using Matlab based hardware co-simulation with both synthetic and real LFV signals. A realtime processing throughput of 467 LFV frames/s is implied with each section of the filter operating at 204, 164 and 115 MHz for input LFV frames of size 9×9×220×360.