If you want high quality SDI capture and play with SDI specific solutions, the DeckLink SDI 4K is the best choice. You can use amazing quality 6G-SDI on PCI Express enabled Mac, Windows, and Linux computers. DeckLink SDI 4K is the world's smallest and most affordable multi-rate SD/HD/Ultra HD SDI video card that connects to any SD/HD-SDI, 2K, or Ultra HD devices. It also supports RS422 deck controls, built-in keyers, and reference inputs to create the perfect solution for editing, painting, and design.