Lightware has announced a new 3G-SDI board, the MX-3GSDI-IB, which accepts SD-SDI, HD-SDI and 3G-SDI video signals with embedded audio on BNC connectors (remember those?). Each channel also incorporates an SDI/HDSDI/3GSDI to HDMI/DVI conversion for switching and processing in the router frame and the SDI input signals are equalized and reclocked. The card also has an additional digital audio input connector (RCA) accepting AES/EBU or S/PDIF digital audio per channel. Both Stereo PCM and 5.1 AC3 encoded formats are supported and are embedded into the video stream. Each input port contains a mini 16×8 channel audio crosspoint that allows de-embedding of up to 16 PCM audio channels from the SDI signal, switching them and re-embedding up to 8 audio channels onto the HDMI stream. Either SDI audio or S/PDIF audio can be embedded, although converting or mixing them is not possible.

Here are the complete specs: http://www.lightwareusa.com/products/by-function/modular-matrix-boards/734-mx-3gsdi-ib