A 590MDE/s semi-global matching processor with lossless data compression

A tile-based semi-global matching (SGM) processor with lossless data compression is proposed. The 8×8 tile-base processing and the P2-less data compression can reduce the external memory access by 85% without any change in the processing result. In addition, the P2-less data compression can decrease on-chip SRAM size by 50%. Implemented in 65nm CMOS technology, the 6.3mm
²
chip consumes 288mW and supports 590MDE/s (million disparity estimation per second) when processing 640×360 resolution with 64-disparity range at 40fps real-time operation.