A programmable concurrent video signal processor

The video signal processor (VSP) is very suitable for various video standards and provides high flexibility for system development. To offer high throughput and hardware efficiency, we propose a concurrent VSP architecture. Our VSP contains three vector function units that work in parallel. The vector function units adopt a vector-pipeline architecture to increase the throughput and reduce the clock cycle time. To take full advantage of the parallel function units, we design a concurrent control unit which eliminates hazards and schedules instructions. The control unit uses the techniques of reservation stations, renaming buffer, out-of-order execution and in-order completion. With these design considerations, our VSP can encode the full-CIF H.261 video with 30 frames/s at an operation frequency of 47 MHz in the Verilog simulation. We have mapped the design on Xilinx FPGA devices and verified it in a logic analyzer.