Host interface 47
Host interface
The Matrox RadientPro PCIe 2.0 Host interface is capable of high-speed DMA
transfers to Host memory, or other memory mapped onto the PCIe bus. The
DMA write engine of the Host interface is capable of performing the transfers
without the help of the Host CPU.
Matrox RadientPro uses PCIe 2.0 technology to communicate with the Host.
Under optimum conditions, Matrox RadientPro can send data to the Host at a
peak transfer rate of up to 3 Gbytes/sec. Optimum conditions include using the
board in a PCIe 2.x slot with 8 active lanes, using a 256-byte payload.
DMA write performance is chipset and computer dependent, and is slightly
affected by the image size and alignment in Host memory.
The Matrox RadientPro Host interface has four DMA write contexts, which act
independently, simulating four DMA write engines running in parallel. The
presence of multiple DMA contexts does not change the maximum bandwidth,
but can help reduce latency.
Bayer color decoder
The Bayer color decoder supports the color information of a single-band, Bayer
color-encoded image, in GBRG, GRBG, BGGR, and RGGB patterns. It uses a
2x2 neighborhood demosiacing algorithm.
